Commit | Line | Data |
---|---|---|
6e90668e | 1 | # B::Deparse.pm |
4ca8de37 SM |
2 | # Copyright (c) 1998-2000, 2002, 2003, 2004, 2005, 2006 Stephen McCamant. |
3 | # All rights reserved. | |
6e90668e SM |
4 | # This module is free software; you can redistribute and/or modify |
5 | # it under the same terms as Perl itself. | |
6 | ||
7 | # This is based on the module of the same name by Malcolm Beattie, | |
8 | # but essentially none of his code remains. | |
9 | ||
a798dbf2 | 10 | package B::Deparse; |
ff97752d | 11 | use Carp; |
51a5edaf | 12 | use B qw(class main_root main_start main_cv svref_2object opnumber perlstring |
bd0865ec | 13 | OPf_WANT OPf_WANT_VOID OPf_WANT_SCALAR OPf_WANT_LIST |
c8ec376c | 14 | OPf_KIDS OPf_REF OPf_STACKED OPf_SPECIAL OPf_MOD OPf_PARENS |
ac1e5644 DM |
15 | OPpLVAL_INTRO OPpOUR_INTRO OPpENTERSUB_AMPER OPpSLICE OPpKVSLICE |
16 | OPpCONST_BARE | |
3ed82cfc | 17 | OPpTRANS_SQUASH OPpTRANS_DELETE OPpTRANS_COMPLEMENT OPpTARGET_MY |
5e462669 | 18 | OPpEXISTS_SUB OPpSORT_NUMERIC OPpSORT_INTEGER OPpREPEAT_DOLIST |
fedf30e1 | 19 | OPpSORT_REVERSE OPpMULTIDEREF_EXISTS OPpMULTIDEREF_DELETE |
5012eebe | 20 | OPpSPLIT_ASSIGN OPpSPLIT_LEX |
748f2c65 | 21 | OPpPADHV_ISKEYS OPpRV2HV_ISKEYS |
4b75096e | 22 | OPpCONCAT_NESTED |
e839e6ed | 23 | OPpMULTICONCAT_APPEND OPpMULTICONCAT_STRINGIFY OPpMULTICONCAT_FAKE |
7e8d786b | 24 | OPpTRUEBOOL OPpINDEX_BOOLNEG |
d989cdac | 25 | SVf_IOK SVf_NOK SVf_ROK SVf_POK SVpad_OUR SVf_FAKE SVs_RMG SVs_SMG |
03b8f76d | 26 | SVs_PADTMP SVpad_TYPED |
e95ab0c0 | 27 | CVf_METHOD CVf_LVALUE |
2be95ceb | 28 | PMf_KEEP PMf_GLOBAL PMf_CONTINUE PMf_EVAL PMf_ONCE |
fedf30e1 | 29 | PMf_MULTILINE PMf_SINGLELINE PMf_FOLD PMf_EXTENDED PMf_EXTENDED_MORE |
bb9bfaa4 | 30 | PADNAMEt_OUTER |
fedf30e1 DM |
31 | MDEREF_reload |
32 | MDEREF_AV_pop_rv2av_aelem | |
33 | MDEREF_AV_gvsv_vivify_rv2av_aelem | |
34 | MDEREF_AV_padsv_vivify_rv2av_aelem | |
35 | MDEREF_AV_vivify_rv2av_aelem | |
36 | MDEREF_AV_padav_aelem | |
37 | MDEREF_AV_gvav_aelem | |
38 | MDEREF_HV_pop_rv2hv_helem | |
39 | MDEREF_HV_gvsv_vivify_rv2hv_helem | |
40 | MDEREF_HV_padsv_vivify_rv2hv_helem | |
41 | MDEREF_HV_vivify_rv2hv_helem | |
42 | MDEREF_HV_padhv_helem | |
43 | MDEREF_HV_gvhv_helem | |
44 | MDEREF_ACTION_MASK | |
45 | MDEREF_INDEX_none | |
46 | MDEREF_INDEX_const | |
47 | MDEREF_INDEX_padsv | |
48 | MDEREF_INDEX_gvsv | |
49 | MDEREF_INDEX_MASK | |
50 | MDEREF_FLAG_last | |
51 | MDEREF_MASK | |
52 | MDEREF_SHIFT | |
53 | ); | |
54 | ||
852c1a84 | 55 | $VERSION = '1.60'; |
a798dbf2 | 56 | use strict; |
1218f5ba | 57 | our $AUTOLOAD; |
34a48b4b | 58 | use warnings (); |
149758b3 | 59 | require feature; |
a798dbf2 | 60 | |
6d63cc8e DM |
61 | use Config; |
62 | ||
aa381260 | 63 | BEGIN { |
ff0cf12f | 64 | # List version-specific constants here. |
2be95ceb NC |
65 | # Easiest way to keep this code portable between version looks to |
66 | # be to fake up a dummy constant that will never actually be true. | |
67 | foreach (qw(OPpSORT_INPLACE OPpSORT_DESCEND OPpITER_REVERSED OPpCONST_NOVER | |
ff0cf12f | 68 | OPpPAD_STATE PMf_SKIPWHITE RXf_SKIPWHITE |
dc6dfd62 | 69 | PMf_CHARSET PMf_KEEPCOPY PMf_NOCAPTURE CVf_ANONCONST |
24fcb59f | 70 | CVf_LOCKED OPpREVERSE_INPLACE OPpSUBSTR_REPL_FIRST |
8a38acca | 71 | PMf_NONDESTRUCT OPpEVAL_BYTES |
9187b6e4 FC |
72 | OPpLVREF_TYPE OPpLVREF_SV OPpLVREF_AV OPpLVREF_HV |
73 | OPpLVREF_CV OPpLVREF_ELEM SVpad_STATE)) { | |
dc6dfd62 | 74 | eval { B->import($_) }; |
2be95ceb NC |
75 | no strict 'refs'; |
76 | *{$_} = sub () {0} unless *{$_}{CODE}; | |
77 | } | |
aa381260 NC |
78 | } |
79 | ||
6e90668e | 80 | # Todo: |
2a9e2f8a RH |
81 | # (See also BUGS section at the end of this file) |
82 | # | |
f4a44678 SM |
83 | # - finish tr/// changes |
84 | # - add option for even more parens (generalize \&foo change) | |
90be192f | 85 | # - left/right context |
58cccf98 | 86 | # - copy comments (look at real text with $^P?) |
f5aa8f4e | 87 | # - avoid semis in one-statement blocks |
9d2c6865 | 88 | # - associativity of &&=, ||=, ?: |
6e90668e SM |
89 | # - ',' => '=>' (auto-unquote?) |
90 | # - break long lines ("\r" as discretionary break?) | |
f4a44678 SM |
91 | # - configurable syntax highlighting: ANSI color, HTML, TeX, etc. |
92 | # - more style options: brace style, hex vs. octal, quotes, ... | |
93 | # - print big ints as hex/octal instead of decimal (heuristic?) | |
e38ccfd9 | 94 | # - handle 'my $x if 0'? |
6e90668e SM |
95 | # - version using op_next instead of op_first/sibling? |
96 | # - avoid string copies (pass arrays, one big join?) | |
9d2c6865 | 97 | # - here-docs? |
6e90668e | 98 | |
d989cdac | 99 | # Current test.deparse failures |
d989cdac SM |
100 | # comp/hints 6 - location of BEGIN blocks wrt. block openings |
101 | # run/switchI 1 - missing -I switches entirely | |
102 | # perl -Ifoo -e 'print @INC' | |
103 | # op/caller 2 - warning mask propagates backwards before warnings::register | |
104 | # 'use warnings; BEGIN {${^WARNING_BITS} eq "U"x12;} use warnings::register' | |
105 | # op/getpid 2 - can't assign to shared my() declaration (threads only) | |
106 | # 'my $x : shared = 5' | |
c4a6f826 | 107 | # op/override 7 - parens on overridden require change v-string interpretation |
d989cdac SM |
108 | # 'BEGIN{*CORE::GLOBAL::require=sub {}} require v5.6' |
109 | # c.f. 'BEGIN { *f = sub {0} }; f 2' | |
110 | # op/pat 774 - losing Unicode-ness of Latin1-only strings | |
111 | # 'use charnames ":short"; $x="\N{latin:a with acute}"' | |
112 | # op/recurse 12 - missing parens on recursive call makes it look like method | |
113 | # 'sub f { f($x) }' | |
114 | # op/subst 90 - inconsistent handling of utf8 under "use utf8" | |
115 | # op/taint 29 - "use re 'taint'" deparsed in the wrong place wrt. block open | |
116 | # op/tiehandle compile - "use strict" deparsed in the wrong place | |
117 | # uni/tr_ several | |
118 | # ext/B/t/xref 11 - line numbers when we add newlines to one-line subs | |
119 | # ext/Data/Dumper/t/dumper compile | |
120 | # ext/DB_file/several | |
121 | # ext/Encode/several | |
122 | # ext/Ernno/Errno warnings | |
123 | # ext/IO/lib/IO/t/io_sel 23 | |
124 | # ext/PerlIO/t/encoding compile | |
125 | # ext/POSIX/t/posix 6 | |
126 | # ext/Socket/Socket 8 | |
127 | # ext/Storable/t/croak compile | |
128 | # lib/Attribute/Handlers/t/multi compile | |
129 | # lib/bignum/ several | |
130 | # lib/charnames 35 | |
131 | # lib/constant 32 | |
132 | # lib/English 40 | |
133 | # lib/ExtUtils/t/bytes 4 | |
134 | # lib/File/DosGlob compile | |
135 | # lib/Filter/Simple/t/data 1 | |
136 | # lib/Math/BigInt/t/constant 1 | |
137 | # lib/Net/t/config Deparse-warning | |
138 | # lib/overload compile | |
139 | # lib/Switch/ several | |
140 | # lib/Symbol 4 | |
141 | # lib/Test/Simple several | |
142 | # lib/Term/Complete | |
143 | # lib/Tie/File/t/29_downcopy 5 | |
144 | # lib/vars 22 | |
f5aa8f4e | 145 | |
fb0be344 | 146 | # Object fields: |
6e90668e | 147 | # |
de4fa237 FC |
148 | # in_coderef2text: |
149 | # True when deparsing via $deparse->coderef2text; false when deparsing the | |
150 | # main program. | |
151 | # | |
6e90668e SM |
152 | # avoid_local: |
153 | # (local($a), local($b)) and local($a, $b) have the same internal | |
154 | # representation but the short form looks better. We notice we can | |
155 | # use a large-scale local when checking the list, but need to prevent | |
d989cdac | 156 | # individual locals too. This hash holds the addresses of OPs that |
6e90668e SM |
157 | # have already had their local-ness accounted for. The same thing |
158 | # is done with my(). | |
159 | # | |
160 | # curcv: | |
161 | # CV for current sub (or main program) being deparsed | |
162 | # | |
8510e997 | 163 | # curcvlex: |
415d4c68 FC |
164 | # Cached hash of lexical variables for curcv: keys are |
165 | # names prefixed with "m" or "o" (representing my/our), and | |
56cd2ef8 FC |
166 | # each value is an array with two elements indicating the cop_seq |
167 | # of scopes in which a var of that name is valid and a third ele- | |
168 | # ment referencing the pad name. | |
8510e997 | 169 | # |
34a48b4b RH |
170 | # curcop: |
171 | # COP for statement being deparsed | |
172 | # | |
6e90668e SM |
173 | # curstash: |
174 | # name of the current package for deparsed code | |
175 | # | |
176 | # subs_todo: | |
c310a5ab FC |
177 | # array of [cop_seq, CV, is_format?, name] for subs and formats we still |
178 | # want to deparse. The fourth element is a pad name thingy for lexical | |
179 | # subs or a string for special blocks. For other subs, it is undef. For | |
180 | # lexical subs, CV may be undef, indicating a stub declaration. | |
6e90668e | 181 | # |
f5aa8f4e SM |
182 | # protos_todo: |
183 | # as above, but [name, prototype] for subs that never got a GV | |
184 | # | |
6e90668e SM |
185 | # subs_done, forms_done: |
186 | # keys are addresses of GVs for subs and formats we've already | |
187 | # deparsed (or at least put into subs_todo) | |
9d2c6865 | 188 | # |
0ca62a8e RH |
189 | # subs_declared |
190 | # keys are names of subs for which we've printed declarations. | |
4a1ac32e FC |
191 | # That means we can omit parentheses from the arguments. It also means we |
192 | # need to put CORE:: on core functions of the same name. | |
0ca62a8e | 193 | # |
9f125c4a FC |
194 | # in_subst_repl |
195 | # True when deparsing the replacement part of a substitution. | |
196 | # | |
c8ec376c FC |
197 | # in_refgen |
198 | # True when deparsing the argument to \. | |
199 | # | |
9d2c6865 | 200 | # parens: -p |
f5aa8f4e | 201 | # linenums: -l |
bd0865ec | 202 | # unquote: -q |
e38ccfd9 | 203 | # cuddle: ' ' or '\n', depending on -sC |
f4a44678 SM |
204 | # indent_size: -si |
205 | # use_tabs: -sT | |
206 | # ex_const: -sv | |
9d2c6865 SM |
207 | |
208 | # A little explanation of how precedence contexts and associativity | |
209 | # work: | |
210 | # | |
211 | # deparse() calls each per-op subroutine with an argument $cx (short | |
212 | # for context, but not the same as the cx* in the perl core), which is | |
213 | # a number describing the op's parents in terms of precedence, whether | |
f5aa8f4e | 214 | # they're inside an expression or at statement level, etc. (see |
9d2c6865 SM |
215 | # chart below). When ops with children call deparse on them, they pass |
216 | # along their precedence. Fractional values are used to implement | |
e38ccfd9 | 217 | # associativity ('($x + $y) + $z' => '$x + $y + $y') and related |
9d2c6865 SM |
218 | # parentheses hacks. The major disadvantage of this scheme is that |
219 | # it doesn't know about right sides and left sides, so say if you | |
220 | # assign a listop to a variable, it can't tell it's allowed to leave | |
221 | # the parens off the listop. | |
222 | ||
223 | # Precedences: | |
224 | # 26 [TODO] inside interpolation context ("") | |
225 | # 25 left terms and list operators (leftward) | |
226 | # 24 left -> | |
227 | # 23 nonassoc ++ -- | |
228 | # 22 right ** | |
229 | # 21 right ! ~ \ and unary + and - | |
230 | # 20 left =~ !~ | |
231 | # 19 left * / % x | |
232 | # 18 left + - . | |
233 | # 17 left << >> | |
234 | # 16 nonassoc named unary operators | |
235 | # 15 nonassoc < > <= >= lt gt le ge | |
236 | # 14 nonassoc == != <=> eq ne cmp | |
237 | # 13 left & | |
238 | # 12 left | ^ | |
239 | # 11 left && | |
240 | # 10 left || | |
241 | # 9 nonassoc .. ... | |
242 | # 8 right ?: | |
243 | # 7 right = += -= *= etc. | |
244 | # 6 left , => | |
245 | # 5 nonassoc list operators (rightward) | |
246 | # 4 right not | |
247 | # 3 left and | |
248 | # 2 left or xor | |
249 | # 1 statement modifiers | |
d989cdac | 250 | # 0.5 statements, but still print scopes as do { ... } |
9d2c6865 | 251 | # 0 statement level |
93a8ff62 | 252 | # -1 format body |
9d2c6865 SM |
253 | |
254 | # Nonprinting characters with special meaning: | |
255 | # \cS - steal parens (see maybe_parens_unop) | |
256 | # \n - newline and indent | |
257 | # \t - increase indent | |
e38ccfd9 | 258 | # \b - decrease indent ('outdent') |
f5aa8f4e | 259 | # \f - flush left (no indent) |
9d2c6865 | 260 | # \cK - kill following semicolon, if any |
6e90668e | 261 | |
ddb55548 FC |
262 | # Semicolon handling: |
263 | # - Individual statements are not deparsed with trailing semicolons. | |
264 | # (If necessary, \cK is tacked on to the end.) | |
265 | # - Whatever code joins statements together or emits them (lineseq, | |
266 | # scopeop, deparse_root) is responsible for adding semicolons where | |
267 | # necessary. | |
268 | # - use statements are deparsed with trailing semicolons because they are | |
269 | # immediately concatenated with the following statement. | |
270 | # - indent() removes semicolons wherever it sees \cK. | |
a7fd8ef6 DM |
271 | |
272 | ||
5e8c3db2 | 273 | BEGIN { for (qw[ const stringify rv2sv list glob pushmark null aelem |
4df85778 | 274 | kvaslice kvhslice padsv argcheck |
ac1e5644 | 275 | nextstate dbstate rv2av rv2hv helem custom ]) { |
76e14ed3 S |
276 | eval "sub OP_\U$_ () { " . opnumber($_) . "}" |
277 | }} | |
a7fd8ef6 DM |
278 | |
279 | # _pessimise_walk(): recursively walk the optree of a sub, | |
280 | # possibly undoing optimisations along the way. | |
281 | ||
f34acfec | 282 | sub DEBUG { 0 } |
8914f6f0 | 283 | use if DEBUG, 'Data::Dumper'; |
f34acfec | 284 | |
a7fd8ef6 DM |
285 | sub _pessimise_walk { |
286 | my ($self, $startop) = @_; | |
287 | ||
288 | return unless $$startop; | |
289 | my ($op, $prevop); | |
290 | for ($op = $startop; $$op; $prevop = $op, $op = $op->sibling) { | |
291 | my $ppname = $op->name; | |
292 | ||
293 | # pessimisations start here | |
294 | ||
295 | if ($ppname eq "padrange") { | |
296 | # remove PADRANGE: | |
d5524600 | 297 | # the original optimisation either (1) changed this: |
a7fd8ef6 | 298 | # pushmark -> (various pad and list and null ops) -> the_rest |
d5524600 DM |
299 | # or (2), for the = @_ case, changed this: |
300 | # pushmark -> gv[_] -> rv2av -> (pad stuff) -> the_rest | |
a7fd8ef6 DM |
301 | # into this: |
302 | # padrange ----------------------------------------> the_rest | |
303 | # so we just need to convert the padrange back into a | |
d5524600 DM |
304 | # pushmark, and in case (1), set its op_next to op_sibling, |
305 | # which is the head of the original chain of optimised-away | |
306 | # pad ops, or for (2), set it to sibling->first, which is | |
307 | # the original gv[_]. | |
a7fd8ef6 DM |
308 | |
309 | $B::overlay->{$$op} = { | |
76e14ed3 | 310 | type => OP_PUSHMARK, |
a7fd8ef6 DM |
311 | name => 'pushmark', |
312 | private => ($op->private & OPpLVAL_INTRO), | |
a7fd8ef6 DM |
313 | }; |
314 | } | |
315 | ||
316 | # pessimisations end here | |
317 | ||
b814db67 DM |
318 | if (class($op) eq 'PMOP') { |
319 | if (ref($op->pmreplroot) | |
320 | && ${$op->pmreplroot} | |
321 | && $op->pmreplroot->isa( 'B::OP' )) | |
322 | { | |
323 | $self-> _pessimise_walk($op->pmreplroot); | |
324 | } | |
325 | ||
326 | # pessimise any /(?{...})/ code blocks | |
327 | my ($re, $cv); | |
328 | my $code_list = $op->code_list; | |
329 | if ($$code_list) { | |
330 | $self->_pessimise_walk($code_list); | |
331 | } | |
332 | elsif (${$re = $op->pmregexp} && ${$cv = $re->qr_anoncv}) { | |
333 | $code_list = $cv->ROOT # leavesub | |
334 | ->first # qr | |
335 | ->code_list; # list | |
336 | $self->_pessimise_walk($code_list); | |
337 | } | |
338 | } | |
a7fd8ef6 DM |
339 | |
340 | if ($op->flags & OPf_KIDS) { | |
341 | $self-> _pessimise_walk($op->first); | |
342 | } | |
343 | ||
344 | } | |
345 | } | |
346 | ||
347 | ||
348 | # _pessimise_walk_exe(): recursively walk the op_next chain of a sub, | |
349 | # possibly undoing optimisations along the way. | |
350 | ||
351 | sub _pessimise_walk_exe { | |
352 | my ($self, $startop, $visited) = @_; | |
353 | ||
f7f169a8 DM |
354 | no warnings 'recursion'; |
355 | ||
a7fd8ef6 DM |
356 | return unless $$startop; |
357 | return if $visited->{$$startop}; | |
358 | my ($op, $prevop); | |
359 | for ($op = $startop; $$op; $prevop = $op, $op = $op->next) { | |
360 | last if $visited->{$$op}; | |
361 | $visited->{$$op} = 1; | |
362 | my $ppname = $op->name; | |
363 | if ($ppname =~ | |
364 | /^((and|d?or)(assign)?|(map|grep)while|range|cond_expr|once)$/ | |
365 | # entertry is also a logop, but its op_other invariably points | |
366 | # into the same chain as the main execution path, so we skip it | |
367 | ) { | |
368 | $self->_pessimise_walk_exe($op->other, $visited); | |
369 | } | |
370 | elsif ($ppname eq "subst") { | |
371 | $self->_pessimise_walk_exe($op->pmreplstart, $visited); | |
372 | } | |
373 | elsif ($ppname =~ /^(enter(loop|iter))$/) { | |
374 | # redoop and nextop will already be covered by the main block | |
375 | # of the loop | |
376 | $self->_pessimise_walk_exe($op->lastop, $visited); | |
377 | } | |
378 | ||
379 | # pessimisations start here | |
380 | } | |
381 | } | |
382 | ||
e63cc694 | 383 | # Go through an optree and "remove" some optimisations by using an |
a7fd8ef6 DM |
384 | # overlay to selectively modify or un-null some ops. Deparsing in the |
385 | # absence of those optimisations is then easier. | |
386 | # | |
387 | # Note that older optimisations are not removed, as Deparse was already | |
388 | # written to recognise them before the pessimise/overlay system was added. | |
389 | ||
390 | sub pessimise { | |
391 | my ($self, $root, $start) = @_; | |
392 | ||
097e9660 | 393 | no warnings 'recursion'; |
a7fd8ef6 DM |
394 | # walk tree in root-to-branch order |
395 | $self->_pessimise_walk($root); | |
396 | ||
397 | my %visited; | |
398 | # walk tree in execution order | |
399 | $self->_pessimise_walk_exe($start, \%visited); | |
400 | } | |
401 | ||
402 | ||
6e90668e SM |
403 | sub null { |
404 | my $op = shift; | |
405 | return class($op) eq "NULL"; | |
406 | } | |
407 | ||
097e9660 DM |
408 | |
409 | # Add a CV to the list of subs that still need deparsing. | |
410 | ||
6e90668e SM |
411 | sub todo { |
412 | my $self = shift; | |
c310a5ab | 413 | my($cv, $is_form, $name) = @_; |
62ae7cfb FC |
414 | my $cvfile = $cv->FILE//''; |
415 | return unless ($cvfile eq $0 || exists $self->{files}{$cvfile}); | |
6e90668e | 416 | my $seq; |
d989cdac SM |
417 | if ($cv->OUTSIDE_SEQ) { |
418 | $seq = $cv->OUTSIDE_SEQ; | |
419 | } elsif (!null($cv->START) and is_state($cv->START)) { | |
6e90668e SM |
420 | $seq = $cv->START->cop_seq; |
421 | } else { | |
422 | $seq = 0; | |
423 | } | |
a9cafc78 FC |
424 | my $stash = $cv->STASH; |
425 | if (class($stash) eq 'HV') { | |
426 | $self->{packs}{$stash->NAME}++; | |
427 | } | |
c310a5ab | 428 | push @{$self->{'subs_todo'}}, [$seq, $cv, $is_form, $name]; |
6e90668e SM |
429 | } |
430 | ||
097e9660 DM |
431 | |
432 | # Pop the next sub from the todo list and deparse it | |
433 | ||
6e90668e SM |
434 | sub next_todo { |
435 | my $self = shift; | |
436 | my $ent = shift @{$self->{'subs_todo'}}; | |
c80ee1fe DM |
437 | my ($seq, $cv, $is_form, $name) = @$ent; |
438 | ||
e276dec7 DM |
439 | # any 'use strict; package foo' that should come before the sub |
440 | # declaration to sync with the first COP of the sub | |
441 | my $pragmata = ''; | |
442 | if ($cv and !null($cv->START) and is_state($cv->START)) { | |
443 | $pragmata = $self->pragmata($cv->START); | |
444 | } | |
445 | ||
c80ee1fe | 446 | if (ref $name) { # lexical sub |
bc304ab2 | 447 | # emit the sub. |
d4f1bfe7 | 448 | my @text; |
c80ee1fe | 449 | my $flags = $name->FLAGS; |
d4f1bfe7 | 450 | push @text, |
c80ee1fe | 451 | !$cv || $seq <= $name->COP_SEQ_RANGE_LOW |
d4f1bfe7 FC |
452 | ? $self->keyword($flags & SVpad_OUR |
453 | ? "our" | |
454 | : $flags & SVpad_STATE | |
455 | ? "state" | |
456 | : "my") . " " | |
457 | : ""; | |
458 | # XXX We would do $self->keyword("sub"), but ‘my CORE::sub’ | |
459 | # doesn’t work and ‘my sub’ ignores a &sub in scope. I.e., | |
460 | # we have a core bug here. | |
c80ee1fe | 461 | push @text, "sub " . substr $name->PVX, 1; |
d4f1bfe7 FC |
462 | if ($cv) { |
463 | # my sub foo { } | |
464 | push @text, " " . $self->deparse_sub($cv); | |
465 | $text[-1] =~ s/ ;$/;/; | |
466 | } | |
467 | else { | |
468 | # my sub foo; | |
469 | push @text, ";\n"; | |
470 | } | |
e276dec7 | 471 | return $pragmata . join "", @text; |
d4f1bfe7 | 472 | } |
bc304ab2 | 473 | |
34a48b4b | 474 | my $gv = $cv->GV; |
c80ee1fe DM |
475 | $name //= $self->gv_name($gv); |
476 | if ($is_form) { | |
e276dec7 | 477 | return $pragmata . $self->keyword("format") . " $name =\n" |
c80ee1fe | 478 | . $self->deparse_format($cv). "\n"; |
6e90668e | 479 | } else { |
d98ae4a6 | 480 | my $use_dec; |
34a48b4b | 481 | if ($name eq "BEGIN") { |
d98ae4a6 | 482 | $use_dec = $self->begin_is_use($cv); |
d989cdac | 483 | if (defined ($use_dec) and $self->{'expand'} < 5) { |
e276dec7 | 484 | return $pragmata if 0 == length($use_dec); |
80719733 DM |
485 | |
486 | # XXX bit of a hack: Test::More's use_ok() method | |
487 | # builds a fake use statement which deparses as, e.g. | |
488 | # use Net::Ping (@{$args[0];}); | |
489 | # As well as being superfluous (the use_ok() is deparsed | |
490 | # too) and ugly, it fails under use strict and otherwise | |
491 | # makes use of a lexical var that's not in scope. | |
492 | # So strip it out. | |
493 | return $pragmata | |
7a4a81c9 DM |
494 | if $use_dec =~ |
495 | m/ | |
496 | \A | |
497 | use \s \S+ \s \(\@\{ | |
498 | ( | |
499 | \s*\#line\ \d+\ \".*"\s* | |
500 | )? | |
501 | \$args\[0\];\}\); | |
502 | \n | |
503 | \Z | |
504 | /x; | |
80719733 | 505 | |
7741ceed | 506 | $use_dec =~ s/^(use|no)\b/$self->keyword($1)/e; |
0e7fe0f0 | 507 | } |
34a48b4b | 508 | } |
a0035eb8 RH |
509 | my $l = ''; |
510 | if ($self->{'linenums'}) { | |
511 | my $line = $gv->LINE; | |
512 | my $file = $gv->FILE; | |
513 | $l = "\n\f#line $line \"$file\"\n"; | |
514 | } | |
127212b2 | 515 | my $p = ''; |
d49c3562 | 516 | my $stash; |
127212b2 | 517 | if (class($cv->STASH) ne "SPECIAL") { |
d49c3562 | 518 | $stash = $cv->STASH->NAME; |
127212b2 | 519 | if ($stash ne $self->{'curstash'}) { |
7741ceed | 520 | $p = $self->keyword("package") . " $stash;\n"; |
127212b2 DM |
521 | $name = "$self->{'curstash'}::$name" unless $name =~ /::/; |
522 | $self->{'curstash'} = $stash; | |
523 | } | |
127212b2 | 524 | } |
d98ae4a6 | 525 | if ($use_dec) { |
e276dec7 | 526 | return "$pragmata$p$l$use_dec"; |
d98ae4a6 | 527 | } |
d49c3562 FC |
528 | if ( $name !~ /::/ and $self->lex_in_scope("&$name") |
529 | || $self->lex_in_scope("&$name", 1) ) | |
530 | { | |
531 | $name = "$self->{'curstash'}::$name"; | |
532 | } elsif (defined $stash) { | |
533 | $name =~ s/^\Q$stash\E::(?!\z|.*::)//; | |
534 | } | |
e276dec7 | 535 | my $ret = "$pragmata${p}${l}" . $self->keyword("sub") . " $name " |
7741ceed | 536 | . $self->deparse_sub($cv); |
f518ad75 FC |
537 | $self->{'subs_declared'}{$name} = 1; |
538 | return $ret; | |
34a48b4b RH |
539 | } |
540 | } | |
541 | ||
c80ee1fe | 542 | |
34a48b4b RH |
543 | # Return a "use" declaration for this BEGIN block, if appropriate |
544 | sub begin_is_use { | |
545 | my ($self, $cv) = @_; | |
546 | my $root = $cv->ROOT; | |
80dc0729 | 547 | local @$self{qw'curcv curcvlex'} = ($cv); |
a7fd8ef6 DM |
548 | local $B::overlay = {}; |
549 | $self->pessimise($root, $cv->START); | |
34a48b4b RH |
550 | #require B::Debug; |
551 | #B::walkoptree($cv->ROOT, "debug"); | |
552 | my $lineseq = $root->first; | |
553 | return if $lineseq->name ne "lineseq"; | |
554 | ||
555 | my $req_op = $lineseq->first->sibling; | |
556 | return if $req_op->name ne "require"; | |
557 | ||
0a30b526 DM |
558 | # maybe it's C<require expr> rather than C<require 'foo'> |
559 | return if ($req_op->first->name ne 'const'); | |
560 | ||
34a48b4b RH |
561 | my $module; |
562 | if ($req_op->first->private & OPpCONST_BARE) { | |
563 | # Actually it should always be a bareword | |
564 | $module = $self->const_sv($req_op->first)->PV; | |
565 | $module =~ s[/][::]g; | |
566 | $module =~ s/.pm$//; | |
567 | } | |
568 | else { | |
d989cdac | 569 | $module = $self->const($self->const_sv($req_op->first), 6); |
34a48b4b RH |
570 | } |
571 | ||
572 | my $version; | |
573 | my $version_op = $req_op->sibling; | |
574 | return if class($version_op) eq "NULL"; | |
575 | if ($version_op->name eq "lineseq") { | |
576 | # We have a version parameter; skip nextstate & pushmark | |
577 | my $constop = $version_op->first->next->next; | |
578 | ||
579 | return unless $self->const_sv($constop)->PV eq $module; | |
580 | $constop = $constop->sibling; | |
a58644de | 581 | $version = $self->const_sv($constop); |
d989cdac SM |
582 | if (class($version) eq "IV") { |
583 | $version = $version->int_value; | |
584 | } elsif (class($version) eq "NV") { | |
585 | $version = $version->NV; | |
586 | } elsif (class($version) ne "PVMG") { | |
587 | # Includes PVIV and PVNV | |
a58644de RGS |
588 | $version = $version->PV; |
589 | } else { | |
590 | # version specified as a v-string | |
591 | $version = 'v'.join '.', map ord, split //, $version->PV; | |
592 | } | |
34a48b4b RH |
593 | $constop = $constop->sibling; |
594 | return if $constop->name ne "method_named"; | |
b46e009d | 595 | return if $self->meth_sv($constop)->PV ne "VERSION"; |
34a48b4b RH |
596 | } |
597 | ||
598 | $lineseq = $version_op->sibling; | |
599 | return if $lineseq->name ne "lineseq"; | |
600 | my $entersub = $lineseq->first->sibling; | |
601 | if ($entersub->name eq "stub") { | |
602 | return "use $module $version ();\n" if defined $version; | |
603 | return "use $module ();\n"; | |
604 | } | |
605 | return if $entersub->name ne "entersub"; | |
606 | ||
607 | # See if there are import arguments | |
608 | my $args = ''; | |
609 | ||
6ec152c3 RH |
610 | my $svop = $entersub->first->sibling; # Skip over pushmark |
611 | return unless $self->const_sv($svop)->PV eq $module; | |
34a48b4b RH |
612 | |
613 | # Pull out the arguments | |
7d6c333c | 614 | for ($svop=$svop->sibling; index($svop->name, "method_") != 0; |
6ec152c3 | 615 | $svop = $svop->sibling) { |
34a48b4b | 616 | $args .= ", " if length($args); |
6ec152c3 | 617 | $args .= $self->deparse($svop, 6); |
34a48b4b RH |
618 | } |
619 | ||
620 | my $use = 'use'; | |
6ec152c3 | 621 | my $method_named = $svop; |
34a48b4b | 622 | return if $method_named->name ne "method_named"; |
b46e009d | 623 | my $method_name = $self->meth_sv($method_named)->PV; |
34a48b4b RH |
624 | |
625 | if ($method_name eq "unimport") { | |
626 | $use = 'no'; | |
627 | } | |
628 | ||
629 | # Certain pragmas are dealt with using hint bits, | |
630 | # so we ignore them here | |
631 | if ($module eq 'strict' || $module eq 'integer' | |
0ced6c29 RGS |
632 | || $module eq 'bytes' || $module eq 'warnings' |
633 | || $module eq 'feature') { | |
34a48b4b RH |
634 | return ""; |
635 | } | |
636 | ||
637 | if (defined $version && length $args) { | |
638 | return "$use $module $version ($args);\n"; | |
639 | } elsif (defined $version) { | |
640 | return "$use $module $version;\n"; | |
641 | } elsif (length $args) { | |
642 | return "$use $module ($args);\n"; | |
643 | } else { | |
644 | return "$use $module;\n"; | |
6e90668e SM |
645 | } |
646 | } | |
647 | ||
6e90668e | 648 | sub stash_subs { |
894e98ac | 649 | my ($self, $pack, $seen) = @_; |
34a48b4b RH |
650 | my (@ret, $stash); |
651 | if (!defined $pack) { | |
652 | $pack = ''; | |
653 | $stash = \%::; | |
f5aa8f4e | 654 | } |
34a48b4b RH |
655 | else { |
656 | $pack =~ s/(::)?$/::/; | |
657 | no strict 'refs'; | |
d1dc589d | 658 | $stash = \%{"main::$pack"}; |
34a48b4b | 659 | } |
894e98ac FC |
660 | return |
661 | if ($seen ||= {})->{ | |
662 | $INC{"overload.pm"} ? overload::StrVal($stash) : $stash | |
663 | }++; | |
7d9a919c DM |
664 | my $stashobj = svref_2object($stash); |
665 | my %stash = $stashobj->ARRAY; | |
34a48b4b | 666 | while (my ($key, $val) = each %stash) { |
de001ba0 FC |
667 | my $flags = $val->FLAGS; |
668 | if ($flags & SVf_ROK) { | |
03b8f76d FC |
669 | # A reference. Dump this if it is a reference to a CV. If it |
670 | # is a constant acting as a proxy for a full subroutine, then | |
671 | # we may or may not have to dump it. If some form of perl- | |
672 | # space visible code must have created it, be it a use | |
67359f08 | 673 | # statement, or some direct symbol-table manipulation code that |
03b8f76d FC |
674 | # we will deparse, then we don’t want to dump it. If it is the |
675 | # result of a declaration like sub f () { 42 } then we *do* | |
676 | # want to dump it. The only way to distinguish these seems | |
677 | # to be the SVs_PADTMP flag on the constant, which is admit- | |
678 | # tedly a hack. | |
679 | my $class = class(my $referent = $val->RV); | |
680 | if ($class eq "CV") { | |
681 | $self->todo($referent, 0); | |
682 | } elsif ( | |
5e965771 | 683 | $class !~ /^(AV|HV|CV|FM|IO|SPECIAL)\z/ |
03b8f76d FC |
684 | # A more robust way to write that would be this, but B does |
685 | # not provide the SVt_ constants: | |
686 | # ($referent->FLAGS & B::SVTYPEMASK) < B::SVt_PVAV | |
687 | and $referent->FLAGS & SVs_PADTMP | |
688 | ) { | |
689 | push @{$self->{'protos_todo'}}, [$pack . $key, $val]; | |
67359f08 | 690 | } |
de001ba0 | 691 | } elsif ($flags & (SVf_POK|SVf_IOK)) { |
a0035eb8 RH |
692 | # Just a prototype. As an ugly but fairly effective way |
693 | # to find out if it belongs here is to see if the AUTOLOAD | |
694 | # (if any) for the stash was defined in one of our files. | |
695 | my $A = $stash{"AUTOLOAD"}; | |
696 | if (defined ($A) && class($A) eq "GV" && defined($A->CV) | |
697 | && class($A->CV) eq "CV") { | |
698 | my $AF = $A->FILE; | |
699 | next unless $AF eq $0 || exists $self->{'files'}{$AF}; | |
700 | } | |
de001ba0 FC |
701 | push @{$self->{'protos_todo'}}, |
702 | [$pack . $key, $flags & SVf_POK ? $val->PV: undef]; | |
703 | } elsif (class($val) eq "GV") { | |
34a48b4b | 704 | if (class(my $cv = $val->CV) ne "SPECIAL") { |
f5aa8f4e | 705 | next if $self->{'subs_done'}{$$val}++; |
7d9a919c DM |
706 | |
707 | # Ignore imposters (aliases etc) | |
708 | my $name = $cv->NAME_HEK; | |
709 | if(defined $name) { | |
710 | # avoid using $cv->GV here because if the $val GV is | |
711 | # an alias, CvGV() could upgrade the real stash entry | |
712 | # from an RV to a GV | |
713 | next unless $name eq $key; | |
714 | next unless $$stashobj == ${$cv->STASH}; | |
715 | } | |
716 | else { | |
717 | next if $$val != ${$cv->GV}; | |
718 | } | |
719 | ||
8510e997 | 720 | $self->todo($cv, 0); |
f5aa8f4e | 721 | } |
e31885a0 | 722 | if (class(my $cv = $val->FORM) ne "SPECIAL") { |
f5aa8f4e | 723 | next if $self->{'forms_done'}{$$val}++; |
e31885a0 RH |
724 | next if $$val != ${$cv->GV}; # Ignore imposters |
725 | $self->todo($cv, 1); | |
f5aa8f4e | 726 | } |
34a48b4b | 727 | if (class($val->HV) ne "SPECIAL" && $key =~ /::$/) { |
74cd21ba | 728 | $self->stash_subs($pack . $key, $seen); |
34a48b4b | 729 | } |
6e90668e SM |
730 | } |
731 | } | |
732 | } | |
a798dbf2 | 733 | |
f5aa8f4e SM |
734 | sub print_protos { |
735 | my $self = shift; | |
736 | my $ar; | |
737 | my @ret; | |
738 | foreach $ar (@{$self->{'protos_todo'}}) { | |
a9cafc78 FC |
739 | if (ref $ar->[1]) { |
740 | # Only print a constant if it occurs in the same package as a | |
741 | # dumped sub. This is not perfect, but a heuristic that will | |
742 | # hopefully work most of the time. Ideally we would use | |
743 | # CvFILE, but a constant stub has no CvFILE. | |
744 | my $pack = ($ar->[0] =~ /(.*)::/)[0]; | |
745 | next if $pack and !$self->{packs}{$pack} | |
746 | } | |
03b8f76d FC |
747 | my $body = defined $ar->[1] |
748 | ? ref $ar->[1] | |
749 | ? " () {\n " . $self->const($ar->[1]->RV,0) . ";\n}" | |
750 | : " (". $ar->[1] . ");" | |
751 | : ";"; | |
752 | push @ret, "sub " . $ar->[0] . "$body\n"; | |
f5aa8f4e SM |
753 | } |
754 | delete $self->{'protos_todo'}; | |
755 | return @ret; | |
756 | } | |
757 | ||
9d2c6865 SM |
758 | sub style_opts { |
759 | my $self = shift; | |
760 | my $opts = shift; | |
761 | my $opt; | |
762 | while (length($opt = substr($opts, 0, 1))) { | |
763 | if ($opt eq "C") { | |
764 | $self->{'cuddle'} = " "; | |
f4a44678 SM |
765 | $opts = substr($opts, 1); |
766 | } elsif ($opt eq "i") { | |
767 | $opts =~ s/^i(\d+)//; | |
768 | $self->{'indent_size'} = $1; | |
769 | } elsif ($opt eq "T") { | |
770 | $self->{'use_tabs'} = 1; | |
771 | $opts = substr($opts, 1); | |
772 | } elsif ($opt eq "v") { | |
773 | $opts =~ s/^v([^.]*)(.|$)//; | |
774 | $self->{'ex_const'} = $1; | |
9d2c6865 | 775 | } |
9d2c6865 SM |
776 | } |
777 | } | |
778 | ||
f4a44678 SM |
779 | sub new { |
780 | my $class = shift; | |
781 | my $self = bless {}, $class; | |
f4a44678 | 782 | $self->{'cuddle'} = "\n"; |
d989cdac SM |
783 | $self->{'curcop'} = undef; |
784 | $self->{'curstash'} = "main"; | |
785 | $self->{'ex_const'} = "'???'"; | |
793e2a70 | 786 | $self->{'expand'} = 0; |
d989cdac | 787 | $self->{'files'} = {}; |
a9cafc78 | 788 | $self->{'packs'} = {}; |
d989cdac | 789 | $self->{'indent_size'} = 4; |
793e2a70 RH |
790 | $self->{'linenums'} = 0; |
791 | $self->{'parens'} = 0; | |
d989cdac SM |
792 | $self->{'subs_todo'} = []; |
793 | $self->{'unquote'} = 0; | |
794 | $self->{'use_dumper'} = 0; | |
795 | $self->{'use_tabs'} = 0; | |
08c6f5ec | 796 | |
e31885a0 | 797 | $self->{'ambient_warnings'} = undef; # Assume no lexical warnings |
a0405c92 | 798 | $self->{'ambient_hints'} = 0; |
0ced6c29 | 799 | $self->{'ambient_hinthash'} = undef; |
08c6f5ec RH |
800 | $self->init(); |
801 | ||
f4a44678 | 802 | while (my $arg = shift @_) { |
d989cdac SM |
803 | if ($arg eq "-d") { |
804 | $self->{'use_dumper'} = 1; | |
805 | require Data::Dumper; | |
806 | } elsif ($arg =~ /^-f(.*)/) { | |
34a48b4b | 807 | $self->{'files'}{$1} = 1; |
d989cdac SM |
808 | } elsif ($arg eq "-l") { |
809 | $self->{'linenums'} = 1; | |
f4a44678 SM |
810 | } elsif ($arg eq "-p") { |
811 | $self->{'parens'} = 1; | |
acaaef34 RGS |
812 | } elsif ($arg eq "-P") { |
813 | $self->{'noproto'} = 1; | |
f4a44678 SM |
814 | } elsif ($arg eq "-q") { |
815 | $self->{'unquote'} = 1; | |
816 | } elsif (substr($arg, 0, 2) eq "-s") { | |
817 | $self->style_opts(substr $arg, 2); | |
58cccf98 SM |
818 | } elsif ($arg =~ /^-x(\d)$/) { |
819 | $self->{'expand'} = $1; | |
f4a44678 SM |
820 | } |
821 | } | |
822 | return $self; | |
823 | } | |
824 | ||
810aef70 RH |
825 | { |
826 | # Mask out the bits that L<warnings::register> uses | |
827 | my $WARN_MASK; | |
828 | BEGIN { | |
829 | $WARN_MASK = $warnings::Bits{all} | $warnings::DeadBits{all}; | |
830 | } | |
831 | sub WARN_MASK () { | |
832 | return $WARN_MASK; | |
833 | } | |
34a48b4b RH |
834 | } |
835 | ||
08c6f5ec RH |
836 | # Initialise the contextual information, either from |
837 | # defaults provided with the ambient_pragmas method, | |
838 | # or from perl's own defaults otherwise. | |
839 | sub init { | |
840 | my $self = shift; | |
841 | ||
e31885a0 RH |
842 | $self->{'warnings'} = defined ($self->{'ambient_warnings'}) |
843 | ? $self->{'ambient_warnings'} & WARN_MASK | |
844 | : undef; | |
d5ec2987 | 845 | $self->{'hints'} = $self->{'ambient_hints'}; |
0ced6c29 | 846 | $self->{'hinthash'} = $self->{'ambient_hinthash'}; |
217aba5d RH |
847 | |
848 | # also a convenient place to clear out subs_declared | |
849 | delete $self->{'subs_declared'}; | |
08c6f5ec RH |
850 | } |
851 | ||
a798dbf2 | 852 | sub compile { |
6e90668e | 853 | my(@args) = @_; |
d989cdac | 854 | return sub { |
f4a44678 | 855 | my $self = B::Deparse->new(@args); |
d2bc402e RGS |
856 | # First deparse command-line args |
857 | if (defined $^I) { # deparse -i | |
51a5edaf | 858 | print q(BEGIN { $^I = ).perlstring($^I).qq(; }\n); |
d2bc402e RGS |
859 | } |
860 | if ($^W) { # deparse -w | |
861 | print qq(BEGIN { \$^W = $^W; }\n); | |
862 | } | |
863 | if ($/ ne "\n" or defined $O::savebackslash) { # deparse -l and -0 | |
51a5edaf RGS |
864 | my $fs = perlstring($/) || 'undef'; |
865 | my $bs = perlstring($O::savebackslash) || 'undef'; | |
d2bc402e RGS |
866 | print qq(BEGIN { \$/ = $fs; \$\\ = $bs; }\n); |
867 | } | |
34a48b4b | 868 | my @BEGINs = B::begin_av->isa("B::AV") ? B::begin_av->ARRAY : (); |
676456c2 AG |
869 | my @UNITCHECKs = B::unitcheck_av->isa("B::AV") |
870 | ? B::unitcheck_av->ARRAY | |
871 | : (); | |
ece599bd | 872 | my @CHECKs = B::check_av->isa("B::AV") ? B::check_av->ARRAY : (); |
34a48b4b RH |
873 | my @INITs = B::init_av->isa("B::AV") ? B::init_av->ARRAY : (); |
874 | my @ENDs = B::end_av->isa("B::AV") ? B::end_av->ARRAY : (); | |
c310a5ab FC |
875 | my @names = qw(BEGIN UNITCHECK CHECK INIT END); |
876 | my @blocks = \(@BEGINs, @UNITCHECKs, @CHECKs, @INITs, @ENDs); | |
877 | while (@names) { | |
878 | my ($name, $blocks) = (shift @names, shift @blocks); | |
879 | for my $block (@$blocks) { | |
880 | $self->todo($block, 0, $name); | |
881 | } | |
34a48b4b RH |
882 | } |
883 | $self->stash_subs(); | |
d989cdac SM |
884 | local($SIG{"__DIE__"}) = |
885 | sub { | |
886 | if ($self->{'curcop'}) { | |
887 | my $cop = $self->{'curcop'}; | |
888 | my($line, $file) = ($cop->line, $cop->file); | |
889 | print STDERR "While deparsing $file near line $line,\n"; | |
890 | } | |
891 | }; | |
6e90668e | 892 | $self->{'curcv'} = main_cv; |
8510e997 | 893 | $self->{'curcvlex'} = undef; |
f5aa8f4e | 894 | print $self->print_protos; |
6e90668e | 895 | @{$self->{'subs_todo'}} = |
f4a44678 | 896 | sort {$a->[0] <=> $b->[0]} @{$self->{'subs_todo'}}; |
a7fd8ef6 DM |
897 | my $root = main_root; |
898 | local $B::overlay = {}; | |
899 | unless (null $root) { | |
d4f1bfe7 | 900 | $self->pad_subs($self->{'curcv'}); |
6436970c FC |
901 | # Check for a stub-followed-by-ex-cop, resulting from a program |
902 | # consisting solely of sub declarations. For backward-compati- | |
903 | # bility (and sane output) we don’t want to emit the stub. | |
904 | # leave | |
905 | # enter | |
906 | # stub | |
907 | # ex-nextstate (or ex-dbstate) | |
908 | my $kid; | |
909 | if ( $root->name eq 'leave' | |
910 | and ($kid = $root->first)->name eq 'enter' | |
911 | and !null($kid = $kid->sibling) and $kid->name eq 'stub' | |
912 | and !null($kid = $kid->sibling) and $kid->name eq 'null' | |
913 | and class($kid) eq 'COP' and null $kid->sibling ) | |
914 | { | |
915 | # ignore | |
916 | } else { | |
917 | $self->pessimise($root, main_start); | |
918 | print $self->indent($self->deparse_root($root)), "\n"; | |
919 | } | |
a7fd8ef6 | 920 | } |
6e90668e SM |
921 | my @text; |
922 | while (scalar(@{$self->{'subs_todo'}})) { | |
923 | push @text, $self->next_todo; | |
924 | } | |
6f611a1a | 925 | print $self->indent(join("", @text)), "\n" if @text; |
e31885a0 RH |
926 | |
927 | # Print __DATA__ section, if necessary | |
928 | no strict 'refs'; | |
96c57f7e RGS |
929 | my $laststash = defined $self->{'curcop'} |
930 | ? $self->{'curcop'}->stash->NAME : $self->{'curstash'}; | |
931 | if (defined *{$laststash."::DATA"}{IO}) { | |
7741ceed | 932 | print $self->keyword("package") . " $laststash;\n" |
127212b2 | 933 | unless $laststash eq $self->{'curstash'}; |
7741ceed | 934 | print $self->keyword("__DATA__") . "\n"; |
96c57f7e | 935 | print readline(*{$laststash."::DATA"}); |
e31885a0 | 936 | } |
a798dbf2 | 937 | } |
a798dbf2 MB |
938 | } |
939 | ||
f4a44678 SM |
940 | sub coderef2text { |
941 | my $self = shift; | |
942 | my $sub = shift; | |
0853f172 | 943 | croak "Usage: ->coderef2text(CODEREF)" unless UNIVERSAL::isa($sub, "CODE"); |
08c6f5ec RH |
944 | |
945 | $self->init(); | |
de4fa237 | 946 | local $self->{in_coderef2text} = 1; |
f4a44678 SM |
947 | return $self->indent($self->deparse_sub(svref_2object($sub))); |
948 | } | |
949 | ||
415d4c68 | 950 | my %strict_bits = do { |
d1718a7c | 951 | local $^H; |
415d4c68 FC |
952 | map +($_ => strict::bits($_)), qw/refs subs vars/ |
953 | }; | |
954 | ||
08c6f5ec RH |
955 | sub ambient_pragmas { |
956 | my $self = shift; | |
8a38acca | 957 | my ($hint_bits, $warning_bits, $hinthash) = (0); |
08c6f5ec RH |
958 | |
959 | while (@_ > 1) { | |
960 | my $name = shift(); | |
961 | my $val = shift(); | |
962 | ||
963 | if ($name eq 'strict') { | |
964 | require strict; | |
965 | ||
966 | if ($val eq 'none') { | |
415d4c68 | 967 | $hint_bits &= $strict_bits{$_} for qw/refs subs vars/; |
08c6f5ec RH |
968 | next(); |
969 | } | |
970 | ||
971 | my @names; | |
972 | if ($val eq "all") { | |
973 | @names = qw/refs subs vars/; | |
974 | } | |
975 | elsif (ref $val) { | |
976 | @names = @$val; | |
977 | } | |
978 | else { | |
a0405c92 | 979 | @names = split' ', $val; |
08c6f5ec | 980 | } |
415d4c68 | 981 | $hint_bits |= $strict_bits{$_} for @names; |
08c6f5ec RH |
982 | } |
983 | ||
a0405c92 RH |
984 | elsif ($name eq 'integer' |
985 | || $name eq 'bytes' | |
986 | || $name eq 'utf8') { | |
987 | require "$name.pm"; | |
08c6f5ec | 988 | if ($val) { |
a0405c92 RH |
989 | $hint_bits |= ${$::{"${name}::"}{"hint_bits"}}; |
990 | } | |
991 | else { | |
992 | $hint_bits &= ~${$::{"${name}::"}{"hint_bits"}}; | |
993 | } | |
994 | } | |
995 | ||
996 | elsif ($name eq 're') { | |
997 | require re; | |
998 | if ($val eq 'none') { | |
2570cdf1 | 999 | $hint_bits &= ~re::bits(qw/taint eval/); |
a0405c92 RH |
1000 | next(); |
1001 | } | |
1002 | ||
1003 | my @names; | |
1004 | if ($val eq 'all') { | |
2570cdf1 | 1005 | @names = qw/taint eval/; |
a0405c92 RH |
1006 | } |
1007 | elsif (ref $val) { | |
1008 | @names = @$val; | |
08c6f5ec RH |
1009 | } |
1010 | else { | |
a0405c92 | 1011 | @names = split' ',$val; |
08c6f5ec | 1012 | } |
a0405c92 | 1013 | $hint_bits |= re::bits(@names); |
08c6f5ec RH |
1014 | } |
1015 | ||
1016 | elsif ($name eq 'warnings') { | |
08c6f5ec | 1017 | if ($val eq 'none') { |
810aef70 | 1018 | $warning_bits = $warnings::NONE; |
08c6f5ec RH |
1019 | next(); |
1020 | } | |
1021 | ||
1022 | my @names; | |
1023 | if (ref $val) { | |
1024 | @names = @$val; | |
1025 | } | |
1026 | else { | |
1027 | @names = split/\s+/, $val; | |
1028 | } | |
1029 | ||
810aef70 | 1030 | $warning_bits = $warnings::NONE if !defined ($warning_bits); |
08c6f5ec RH |
1031 | $warning_bits |= warnings::bits(@names); |
1032 | } | |
1033 | ||
1034 | elsif ($name eq 'warning_bits') { | |
1035 | $warning_bits = $val; | |
1036 | } | |
1037 | ||
1038 | elsif ($name eq 'hint_bits') { | |
1039 | $hint_bits = $val; | |
1040 | } | |
1041 | ||
0ced6c29 RGS |
1042 | elsif ($name eq '%^H') { |
1043 | $hinthash = $val; | |
1044 | } | |
1045 | ||
08c6f5ec RH |
1046 | else { |
1047 | croak "Unknown pragma type: $name"; | |
1048 | } | |
1049 | } | |
1050 | if (@_) { | |
1051 | croak "The ambient_pragmas method expects an even number of args"; | |
1052 | } | |
1053 | ||
08c6f5ec | 1054 | $self->{'ambient_warnings'} = $warning_bits; |
a0405c92 | 1055 | $self->{'ambient_hints'} = $hint_bits; |
0ced6c29 | 1056 | $self->{'ambient_hinthash'} = $hinthash; |
08c6f5ec RH |
1057 | } |
1058 | ||
d989cdac | 1059 | # This method is the inner loop, so try to keep it simple |
6e90668e SM |
1060 | sub deparse { |
1061 | my $self = shift; | |
d989cdac | 1062 | my($op, $cx) = @_; |
34a48b4b RH |
1063 | |
1064 | Carp::confess("Null op in deparse") if !defined($op) | |
1065 | || class($op) eq "NULL"; | |
3f872cb9 | 1066 | my $meth = "pp_" . $op->name; |
9d2c6865 | 1067 | return $self->$meth($op, $cx); |
a798dbf2 MB |
1068 | } |
1069 | ||
6e90668e | 1070 | sub indent { |
f4a44678 | 1071 | my $self = shift; |
6e90668e | 1072 | my $txt = shift; |
5e617af5 FC |
1073 | # \cK also swallows a preceding line break when followed by a |
1074 | # semicolon. | |
1075 | $txt =~ s/\n\cK;//g; | |
6e90668e SM |
1076 | my @lines = split(/\n/, $txt); |
1077 | my $leader = ""; | |
f4a44678 | 1078 | my $level = 0; |
6e90668e SM |
1079 | my $line; |
1080 | for $line (@lines) { | |
f4a44678 SM |
1081 | my $cmd = substr($line, 0, 1); |
1082 | if ($cmd eq "\t" or $cmd eq "\b") { | |
1083 | $level += ($cmd eq "\t" ? 1 : -1) * $self->{'indent_size'}; | |
1084 | if ($self->{'use_tabs'}) { | |
1085 | $leader = "\t" x ($level / 8) . " " x ($level % 8); | |
1086 | } else { | |
1087 | $leader = " " x $level; | |
1088 | } | |
6e90668e SM |
1089 | $line = substr($line, 1); |
1090 | } | |
f2734596 HE |
1091 | if (index($line, "\f") > 0) { |
1092 | $line =~ s/\f/\n/; | |
1093 | } | |
f5aa8f4e SM |
1094 | if (substr($line, 0, 1) eq "\f") { |
1095 | $line = substr($line, 1); # no indent | |
1096 | } else { | |
1097 | $line = $leader . $line; | |
1098 | } | |
9d2c6865 | 1099 | $line =~ s/\cK;?//g; |
6e90668e SM |
1100 | } |
1101 | return join("\n", @lines); | |
1102 | } | |
1103 | ||
d4f1bfe7 FC |
1104 | sub pad_subs { |
1105 | my ($self, $cv) = @_; | |
1106 | my $padlist = $cv->PADLIST; | |
1107 | my @names = $padlist->ARRAYelt(0)->ARRAY; | |
1108 | my @values = $padlist->ARRAYelt(1)->ARRAY; | |
1109 | my @todo; | |
2c5ddcd3 | 1110 | PADENTRY: |
d4f1bfe7 FC |
1111 | for my $ix (0.. $#names) { for $_ ($names[$ix]) { |
1112 | next if class($_) eq "SPECIAL"; | |
1113 | my $name = $_->PVX; | |
679f2252 | 1114 | if (defined $name && $name =~ /^&./) { |
d4f1bfe7 FC |
1115 | my $low = $_->COP_SEQ_RANGE_LOW; |
1116 | my $flags = $_->FLAGS; | |
494a4b9c | 1117 | my $outer = $flags & PADNAMEt_OUTER; |
d4f1bfe7 | 1118 | if ($flags & SVpad_OUR) { |
bb9bfaa4 | 1119 | push @todo, [$low, undef, 0, $_] |
d4f1bfe7 | 1120 | # [seq, no cv, not format, padname] |
494a4b9c | 1121 | unless $outer; |
d4f1bfe7 FC |
1122 | next; |
1123 | } | |
1124 | my $protocv = $flags & SVpad_STATE | |
1125 | ? $values[$ix] | |
97d78f94 | 1126 | : $_->PROTOCV; |
2c5ddcd3 FC |
1127 | if (class ($protocv) ne 'CV') { |
1128 | my $flags = $flags; | |
1129 | my $cv = $cv; | |
1130 | my $name = $_; | |
1131 | while ($flags & PADNAMEt_OUTER && class ($protocv) ne 'CV') | |
1132 | { | |
1133 | $cv = $cv->OUTSIDE; | |
1134 | next PADENTRY if class($cv) eq 'SPECIAL'; # XXX freed? | |
1135 | my $padlist = $cv->PADLIST; | |
1136 | my $ix = $name->PARENT_PAD_INDEX; | |
1137 | $name = $padlist->NAMES->ARRAYelt($ix); | |
1138 | $flags = $name->FLAGS; | |
1139 | $protocv = $flags & SVpad_STATE | |
1140 | ? $padlist->ARRAYelt(1)->ARRAYelt($ix) | |
1141 | : $name->PROTOCV; | |
1142 | } | |
1143 | } | |
494a4b9c FC |
1144 | my $defined_in_this_sub = ${$protocv->OUTSIDE} == $$cv || do { |
1145 | my $other = $protocv->PADLIST; | |
1146 | $$other && $other->outid == $padlist->id; | |
1147 | }; | |
bb9bfaa4 | 1148 | if ($flags & PADNAMEt_OUTER) { |
494a4b9c | 1149 | next unless $defined_in_this_sub; |
bb9bfaa4 FC |
1150 | push @todo, [$protocv->OUTSIDE_SEQ, $protocv, 0, $_]; |
1151 | next; | |
1152 | } | |
d4f1bfe7 FC |
1153 | my $outseq = $protocv->OUTSIDE_SEQ; |
1154 | if ($outseq <= $low) { | |
1155 | # defined before its name is visible, so it’s gotta be | |
1156 | # declared and defined at once: my sub foo { ... } | |
1157 | push @todo, [$low, $protocv, 0, $_]; | |
1158 | } | |
1159 | else { | |
1160 | # declared and defined separately: my sub f; sub f { ... } | |
494a4b9c FC |
1161 | push @todo, [$low, undef, 0, $_]; |
1162 | push @todo, [$outseq, $protocv, 0, $_] | |
1163 | if $defined_in_this_sub; | |
d4f1bfe7 FC |
1164 | } |
1165 | } | |
1166 | }} | |
1167 | @{$self->{'subs_todo'}} = | |
1168 | sort {$a->[0] <=> $b->[0]} @{$self->{'subs_todo'}}, @todo | |
1169 | } | |
1170 | ||
60f638af DM |
1171 | |
1172 | # deparse_argops(): deparse, if possible, a sequence of argcheck + argelem | |
1173 | # ops into a subroutine signature. If successful, return the first op | |
1174 | # following the signature ops plus the signature string; else return the | |
1175 | # empty list. | |
1176 | # | |
1177 | # Normally a bunch of argelem ops will have been generated by the | |
1178 | # signature parsing, but it's possible that ops have been added manually | |
894f226e | 1179 | # or altered. In this case we return "()" and fall back to general |
60f638af DM |
1180 | # deparsing of the individual sigelems as 'my $x = $_[N]' etc. |
1181 | # | |
4df85778 DM |
1182 | # We're only called if the top is an ex-argcheck, which is a placeholder |
1183 | # indicating a signature subtree. | |
1184 | # | |
1185 | # Return a signature string, or an empty list if no deparseable as a | |
1186 | # signature | |
60f638af DM |
1187 | |
1188 | sub deparse_argops { | |
4df85778 | 1189 | my ($self, $topop, $cv) = @_; |
60f638af DM |
1190 | |
1191 | my @sig; | |
4df85778 DM |
1192 | |
1193 | ||
1194 | $topop = $topop->first; | |
1195 | return unless $$topop and $topop->name eq 'lineseq'; | |
1196 | ||
1197 | ||
1198 | # last op should be nextstate | |
1199 | my $last = $topop->last; | |
1200 | return unless $$last | |
1201 | and ( _op_is_or_was($last, OP_NEXTSTATE) | |
1202 | or _op_is_or_was($last, OP_DBSTATE)); | |
1203 | ||
1204 | # first OP_NEXTSTATE | |
1205 | ||
1206 | my $o = $topop->first; | |
1207 | return unless $$o; | |
1208 | return if $o->label; | |
60f638af DM |
1209 | |
1210 | # OP_ARGCHECK | |
1211 | ||
1212 | $o = $o->sibling; | |
4df85778 DM |
1213 | return unless $$o and $o->name eq 'argcheck'; |
1214 | ||
60f638af DM |
1215 | my ($params, $opt_params, $slurpy) = $o->aux_list($cv); |
1216 | my $mandatory = $params - $opt_params; | |
1217 | my $seen_slurpy = 0; | |
1218 | my $last_ix = -1; | |
1219 | ||
4df85778 DM |
1220 | # keep looking for valid nextstate + argelem pairs, terminated |
1221 | # by a final nextstate | |
60f638af DM |
1222 | |
1223 | while (1) { | |
60f638af | 1224 | $o = $o->sibling; |
4df85778 DM |
1225 | return unless $$o; |
1226 | ||
1227 | # skip trailing nextstate | |
1228 | last if $$o == $$last; | |
1229 | ||
1230 | # OP_NEXTSTATE | |
1231 | return unless $o->name =~ /^(next|db)state$/; | |
1232 | return if $o->label; | |
60f638af DM |
1233 | |
1234 | # OP_ARGELEM | |
4df85778 DM |
1235 | $o = $o->sibling; |
1236 | last unless $$o; | |
60f638af | 1237 | |
4df85778 DM |
1238 | if ($o->name eq 'argelem') { |
1239 | my $ix = $o->string($cv); | |
60f638af DM |
1240 | while (++$last_ix < $ix) { |
1241 | push @sig, $last_ix < $mandatory ? '$' : '$='; | |
1242 | } | |
4df85778 | 1243 | my $var = $self->padname($o->targ); |
60f638af DM |
1244 | if ($var =~ /^[@%]/) { |
1245 | return if $seen_slurpy; | |
1246 | $seen_slurpy = 1; | |
1247 | return if $ix != $params or !$slurpy | |
1248 | or substr($var,0,1) ne $slurpy; | |
1249 | } | |
1250 | else { | |
1251 | return if $ix >= $params; | |
1252 | } | |
4df85778 DM |
1253 | if ($o->flags & OPf_KIDS) { |
1254 | my $kid = $o->first; | |
60f638af DM |
1255 | return unless $$kid and $kid->name eq 'argdefelem'; |
1256 | my $def = $self->deparse($kid->first, 7); | |
1257 | $def = "($def)" if $kid->first->flags & OPf_PARENS; | |
1258 | $var .= " = $def"; | |
1259 | } | |
1260 | push @sig, $var; | |
1261 | } | |
4df85778 DM |
1262 | elsif ($o->name eq 'null' |
1263 | and ($o->flags & OPf_KIDS) | |
1264 | and $o->first->name eq 'argdefelem') | |
60f638af DM |
1265 | { |
1266 | # special case - a void context default expression: $ = expr | |
1267 | ||
4df85778 | 1268 | my $defop = $o->first; |
60f638af DM |
1269 | my $ix = $defop->targ; |
1270 | while (++$last_ix < $ix) { | |
1271 | push @sig, $last_ix < $mandatory ? '$' : '$='; | |
1272 | } | |
1273 | return if $last_ix >= $params | |
1274 | or $last_ix < $mandatory; | |
1275 | my $def = $self->deparse($defop->first, 7); | |
1276 | $def = "($def)" if $defop->first->flags & OPf_PARENS; | |
1277 | push @sig, '$ = ' . $def; | |
1278 | } | |
1279 | else { | |
4df85778 | 1280 | return; |
60f638af DM |
1281 | } |
1282 | ||
60f638af DM |
1283 | } |
1284 | ||
1285 | while (++$last_ix < $params) { | |
1286 | push @sig, $last_ix < $mandatory ? '$' : '$='; | |
1287 | } | |
1288 | push @sig, $slurpy if $slurpy and !$seen_slurpy; | |
1289 | ||
4df85778 | 1290 | return (join(', ', @sig)); |
60f638af DM |
1291 | } |
1292 | ||
4df85778 | 1293 | |
097e9660 DM |
1294 | # Deparse a sub. Returns everything except the 'sub foo', |
1295 | # e.g. ($$) : method { ...; } | |
894f226e | 1296 | # or : prototype($$) lvalue ($a, $b) { ...; }; |
60f638af | 1297 | |
6e90668e SM |
1298 | sub deparse_sub { |
1299 | my $self = shift; | |
1300 | my $cv = shift; | |
9fe5784b | 1301 | my @attrs; |
894f226e DM |
1302 | my $proto; |
1303 | my $sig; | |
9fe5784b | 1304 | |
ce4e655d | 1305 | Carp::confess("NULL in deparse_sub") if !defined($cv) || $cv->isa("B::NULL"); |
34a48b4b RH |
1306 | Carp::confess("SPECIAL in deparse_sub") if $cv->isa("B::SPECIAL"); |
1307 | local $self->{'curcop'} = $self->{'curcop'}; | |
9fe5784b DM |
1308 | |
1309 | my $has_sig = $self->{hinthash}{feature_signatures}; | |
6e90668e | 1310 | if ($cv->FLAGS & SVf_POK) { |
894f226e | 1311 | my $myproto = $cv->PV; |
9fe5784b | 1312 | if ($has_sig) { |
894f226e | 1313 | push @attrs, "prototype($myproto)"; |
9fe5784b DM |
1314 | } |
1315 | else { | |
894f226e | 1316 | $proto = $myproto; |
9fe5784b | 1317 | } |
6e90668e | 1318 | } |
b77472f9 | 1319 | if ($cv->CvFLAGS & (CVf_METHOD|CVf_LOCKED|CVf_LVALUE|CVf_ANONCONST)) { |
9fe5784b | 1320 | push @attrs, "lvalue" if $cv->CvFLAGS & CVf_LVALUE; |
9fe5784b DM |
1321 | push @attrs, "method" if $cv->CvFLAGS & CVf_METHOD; |
1322 | push @attrs, "const" if $cv->CvFLAGS & CVf_ANONCONST; | |
6aaf4108 SC |
1323 | } |
1324 | ||
6e90668e | 1325 | local($self->{'curcv'}) = $cv; |
8510e997 | 1326 | local($self->{'curcvlex'}); |
0ced6c29 RGS |
1327 | local(@$self{qw'curstash warnings hints hinthash'}) |
1328 | = @$self{qw'curstash warnings hints hinthash'}; | |
ce4e655d | 1329 | my $body; |
a7fd8ef6 DM |
1330 | my $root = $cv->ROOT; |
1331 | local $B::overlay = {}; | |
1332 | if (not null $root) { | |
d4f1bfe7 | 1333 | $self->pad_subs($cv); |
a7fd8ef6 DM |
1334 | $self->pessimise($root, $cv->START); |
1335 | my $lineseq = $root->first; | |
4df85778 DM |
1336 | |
1337 | # stub sub may have single op rather than list of ops | |
1338 | my $is_list = ($lineseq->name eq "lineseq"); | |
1339 | my $firstop = $is_list ? $lineseq->first : $lineseq; | |
1340 | ||
1341 | # Try to deparse first subtree as a signature if possible. | |
1342 | # Top of signature subtree has an ex-argcheck as a placeholder | |
1343 | if ( $has_sig | |
1344 | and $$firstop | |
1345 | and $firstop->name eq 'null' | |
1346 | and $firstop->targ == OP_ARGCHECK | |
1347 | ) { | |
1348 | my ($mysig) = $self->deparse_argops($firstop, $cv); | |
1349 | if (defined $mysig) { | |
1350 | $sig = $mysig; | |
1351 | $firstop = $is_list ? $firstop->sibling : undef; | |
60f638af | 1352 | } |
4df85778 | 1353 | } |
60f638af | 1354 | |
4df85778 | 1355 | if ($is_list && $firstop) { |
60f638af DM |
1356 | my @ops; |
1357 | for (my $o = $firstop; $$o; $o=$o->sibling) { | |
ce4e655d RH |
1358 | push @ops, $o; |
1359 | } | |
93a8ff62 | 1360 | $body = $self->lineseq(undef, 0, @ops).";"; |
60f638af | 1361 | if (!$has_sig and $ops[-1]->name =~ /^(next|db)state$/) { |
4fa06845 DM |
1362 | # this handles void context in |
1363 | # use feature signatures; sub ($=1) {} | |
1364 | $body .= "\n()"; | |
1365 | } | |
ce4e655d RH |
1366 | my $scope_en = $self->find_scope_en($lineseq); |
1367 | if (defined $scope_en) { | |
1368 | my $subs = join"", $self->seq_subs($scope_en); | |
1369 | $body .= ";\n$subs" if length($subs); | |
1370 | } | |
1371 | } | |
4df85778 | 1372 | elsif ($firstop) { |
a7fd8ef6 | 1373 | $body = $self->deparse($root->first, 0); |
ce4e655d | 1374 | } |
4df85778 DM |
1375 | else { |
1376 | $body = ';'; # stub sub | |
1377 | } | |
bce0f226 DM |
1378 | |
1379 | my $l = ''; | |
1380 | if ($self->{'linenums'}) { | |
1381 | # a glob's gp_line is set from the line containing a | |
1382 | # sub's closing '}' if the CV is the first use of the GV. | |
1383 | # So make sure the linenum is set correctly for '}' | |
1384 | my $gv = $cv->GV; | |
1385 | my $line = $gv->LINE; | |
1386 | my $file = $gv->FILE; | |
1387 | $l = "\f#line $line \"$file\"\n"; | |
1388 | } | |
1389 | $body = "{\n\t$body\n$l\b}"; | |
de3f1649 | 1390 | } |
ce4e655d RH |
1391 | else { |
1392 | my $sv = $cv->const_sv; | |
1393 | if ($$sv) { | |
1394 | # uh-oh. inlinable sub... format it differently | |
9fe5784b | 1395 | $body = "{ " . $self->const($sv, 0) . " }\n"; |
ce4e655d | 1396 | } else { # XSUB? (or just a declaration) |
9fe5784b | 1397 | $body = ';' |
ce4e655d | 1398 | } |
6e90668e | 1399 | } |
894f226e DM |
1400 | $proto = defined $proto ? "($proto) " : ""; |
1401 | $sig = defined $sig ? "($sig) " : ""; | |
9fe5784b DM |
1402 | my $attrs = ''; |
1403 | $attrs = ': ' . join('', map "$_ ", @attrs) if @attrs; | |
894f226e | 1404 | return "$proto$attrs$sig$body\n"; |
6e90668e SM |
1405 | } |
1406 | ||
1407 | sub deparse_format { | |
1408 | my $self = shift; | |
1409 | my $form = shift; | |
1410 | my @text; | |
1411 | local($self->{'curcv'}) = $form; | |
8510e997 | 1412 | local($self->{'curcvlex'}); |
67fc2416 | 1413 | local($self->{'in_format'}) = 1; |
0ced6c29 RGS |
1414 | local(@$self{qw'curstash warnings hints hinthash'}) |
1415 | = @$self{qw'curstash warnings hints hinthash'}; | |
6e90668e | 1416 | my $op = $form->ROOT; |
a7fd8ef6 DM |
1417 | local $B::overlay = {}; |
1418 | $self->pessimise($op, $form->START); | |
6e90668e | 1419 | my $kid; |
fb725297 RGS |
1420 | return "\f." if $op->first->name eq 'stub' |
1421 | || $op->first->name eq 'nextstate'; | |
6e90668e SM |
1422 | $op = $op->first->first; # skip leavewrite, lineseq |
1423 | while (not null $op) { | |
1424 | $op = $op->sibling; # skip nextstate | |
1425 | my @exprs; | |
1426 | $kid = $op->first->sibling; # skip pushmark | |
a5b0cd91 | 1427 | push @text, "\f".$self->const_sv($kid)->PV; |
6e90668e SM |
1428 | $kid = $kid->sibling; |
1429 | for (; not null $kid; $kid = $kid->sibling) { | |
93a8ff62 | 1430 | push @exprs, $self->deparse($kid, -1); |
31c26a0a | 1431 | $exprs[-1] =~ s/;\z//; |
6e90668e | 1432 | } |
a5b0cd91 | 1433 | push @text, "\f".join(", ", @exprs)."\n" if @exprs; |
6e90668e SM |
1434 | $op = $op->sibling; |
1435 | } | |
a5b0cd91 | 1436 | return join("", @text) . "\f."; |
6e90668e SM |
1437 | } |
1438 | ||
6e90668e | 1439 | sub is_scope { |
a798dbf2 | 1440 | my $op = shift; |
3f872cb9 GS |
1441 | return $op->name eq "leave" || $op->name eq "scope" |
1442 | || $op->name eq "lineseq" | |
d989cdac | 1443 | || ($op->name eq "null" && class($op) eq "UNOP" |
3f872cb9 | 1444 | && (is_scope($op->first) || $op->first->name eq "enter")); |
6e90668e SM |
1445 | } |
1446 | ||
1447 | sub is_state { | |
3f872cb9 GS |
1448 | my $name = $_[0]->name; |
1449 | return $name eq "nextstate" || $name eq "dbstate" || $name eq "setstate"; | |
6e90668e SM |
1450 | } |
1451 | ||
e38ccfd9 | 1452 | sub is_miniwhile { # check for one-line loop ('foo() while $y--') |
6e90668e | 1453 | my $op = shift; |
d989cdac | 1454 | return (!null($op) and null($op->sibling) |
3f872cb9 GS |
1455 | and $op->name eq "null" and class($op) eq "UNOP" |
1456 | and (($op->first->name =~ /^(and|or)$/ | |
1457 | and $op->first->first->sibling->name eq "lineseq") | |
1458 | or ($op->first->name eq "lineseq" | |
6e90668e | 1459 | and not null $op->first->first->sibling |
3f872cb9 | 1460 | and $op->first->first->sibling->name eq "unstack") |
6e90668e SM |
1461 | )); |
1462 | } | |
1463 | ||
d989cdac SM |
1464 | # Check if the op and its sibling are the initialization and the rest of a |
1465 | # for (..;..;..) { ... } loop | |
1466 | sub is_for_loop { | |
1467 | my $op = shift; | |
1468 | # This OP might be almost anything, though it won't be a | |
1469 | # nextstate. (It's the initialization, so in the canonical case it | |
eae48c89 Z |
1470 | # will be an sassign.) The sibling is (old style) a lineseq whose |
1471 | # first child is a nextstate and whose second is a leaveloop, or | |
1472 | # (new style) an unstack whose sibling is a leaveloop. | |
d989cdac | 1473 | my $lseq = $op->sibling; |
eae48c89 Z |
1474 | return 0 unless !is_state($op) and !null($lseq); |
1475 | if ($lseq->name eq "lineseq") { | |
d989cdac SM |
1476 | if ($lseq->first && !null($lseq->first) && is_state($lseq->first) |
1477 | && (my $sib = $lseq->first->sibling)) { | |
1478 | return (!null($sib) && $sib->name eq "leaveloop"); | |
1479 | } | |
eae48c89 Z |
1480 | } elsif ($lseq->name eq "unstack" && ($lseq->flags & OPf_SPECIAL)) { |
1481 | my $sib = $lseq->sibling; | |
1482 | return $sib && !null($sib) && $sib->name eq "leaveloop"; | |
d989cdac SM |
1483 | } |
1484 | return 0; | |
1485 | } | |
1486 | ||
6e90668e SM |
1487 | sub is_scalar { |
1488 | my $op = shift; | |
3f872cb9 GS |
1489 | return ($op->name eq "rv2sv" or |
1490 | $op->name eq "padsv" or | |
1491 | $op->name eq "gv" or # only in array/hash constructs | |
bd0865ec | 1492 | $op->flags & OPf_KIDS && !null($op->first) |
3f872cb9 | 1493 | && $op->first->name eq "gvsv"); |
6e90668e SM |
1494 | } |
1495 | ||
9d2c6865 SM |
1496 | sub maybe_parens { |
1497 | my $self = shift; | |
1498 | my($text, $cx, $prec) = @_; | |
1499 | if ($prec < $cx # unary ops nest just fine | |
1500 | or $prec == $cx and $cx != 4 and $cx != 16 and $cx != 21 | |
1501 | or $self->{'parens'}) | |
1502 | { | |
1503 | $text = "($text)"; | |
1504 | # In a unop, let parent reuse our parens; see maybe_parens_unop | |
1505 | $text = "\cS" . $text if $cx == 16; | |
1506 | return $text; | |
1507 | } else { | |
1508 | return $text; | |
1509 | } | |
1510 | } | |
1511 | ||
e38ccfd9 | 1512 | # same as above, but get around the 'if it looks like a function' rule |
9d2c6865 SM |
1513 | sub maybe_parens_unop { |
1514 | my $self = shift; | |
1515 | my($name, $kid, $cx) = @_; | |
1516 | if ($cx > 16 or $self->{'parens'}) { | |
a0035eb8 RH |
1517 | $kid = $self->deparse($kid, 1); |
1518 | if ($name eq "umask" && $kid =~ /^\d+$/) { | |
1519 | $kid = sprintf("%#o", $kid); | |
1520 | } | |
4a1ac32e | 1521 | return $self->keyword($name) . "($kid)"; |
9d2c6865 SM |
1522 | } else { |
1523 | $kid = $self->deparse($kid, 16); | |
a0035eb8 RH |
1524 | if ($name eq "umask" && $kid =~ /^\d+$/) { |
1525 | $kid = sprintf("%#o", $kid); | |
1526 | } | |
4a1ac32e | 1527 | $name = $self->keyword($name); |
9d2c6865 SM |
1528 | if (substr($kid, 0, 1) eq "\cS") { |
1529 | # use kid's parens | |
1530 | return $name . substr($kid, 1); | |
1531 | } elsif (substr($kid, 0, 1) eq "(") { | |
1532 | # avoid looks-like-a-function trap with extra parens | |
e38ccfd9 | 1533 | # ('+' can lead to ambiguities) |
9d2c6865 SM |
1534 | return "$name(" . $kid . ")"; |
1535 | } else { | |
1536 | return "$name $kid"; | |
1537 | } | |
1538 | } | |
1539 | } | |
1540 | ||
1541 | sub maybe_parens_func { | |
1542 | my $self = shift; | |
1543 | my($func, $text, $cx, $prec) = @_; | |
1544 | if ($prec <= $cx or substr($text, 0, 1) eq "(" or $self->{'parens'}) { | |
1545 | return "$func($text)"; | |
1546 | } else { | |
1547 | return "$func $text"; | |
1548 | } | |
1549 | } | |
1550 | ||
56cd2ef8 FC |
1551 | sub find_our_type { |
1552 | my ($self, $name) = @_; | |
1553 | $self->populate_curcvlex() if !defined $self->{'curcvlex'}; | |
5afbd733 | 1554 | my $seq = $self->{'curcop'} ? $self->{'curcop'}->cop_seq : 0; |
56cd2ef8 FC |
1555 | for my $a (@{$self->{'curcvlex'}{"o$name"}}) { |
1556 | my ($st, undef, $padname) = @$a; | |
5afbd733 | 1557 | if ($st >= $seq && $padname->FLAGS & SVpad_TYPED) { |
56cd2ef8 FC |
1558 | return $padname->SvSTASH->NAME; |
1559 | } | |
1560 | } | |
1561 | return ''; | |
1562 | } | |
1563 | ||
6e90668e SM |
1564 | sub maybe_local { |
1565 | my $self = shift; | |
9d2c6865 | 1566 | my($op, $cx, $text) = @_; |
c8ec376c | 1567 | my $name = $op->name; |
9187b6e4 FC |
1568 | my $our_intro = ($name =~ /^(?:(?:gv|rv2)[ash]v|split|refassign |
1569 | |lv(?:av)?ref)$/x) | |
de183bbb FC |
1570 | ? OPpOUR_INTRO |
1571 | : 0; | |
1572 | my $lval_intro = $name eq 'split' ? 0 : OPpLVAL_INTRO; | |
c8ec376c FC |
1573 | # The @a in \(@a) isn't in ref context, but only when the |
1574 | # parens are there. | |
1575 | my $need_parens = $self->{'in_refgen'} && $name =~ /[ah]v\z/ | |
1576 | && ($op->flags & (OPf_PARENS|OPf_REF)) == OPf_PARENS; | |
de183bbb | 1577 | if ((my $priv = $op->private) & ($lval_intro|$our_intro)) { |
f3515641 | 1578 | my @our_local; |
de183bbb | 1579 | push @our_local, "local" if $priv & $lval_intro; |
f3515641 | 1580 | push @our_local, "our" if $priv & $our_intro; |
3188a821 | 1581 | my $our_local = join " ", map $self->keyword($_), @our_local; |
f3515641 | 1582 | if( $our_local[-1] eq 'our' ) { |
640d5d41 FC |
1583 | if ( $text !~ /^\W(\w+::)*\w+\z/ |
1584 | and !utf8::decode($text) || $text !~ /^\W(\w+::)*\w+\z/ | |
1585 | ) { | |
1586 | die "Unexpected our($text)\n"; | |
1587 | } | |
d989cdac | 1588 | $text =~ s/(\w+::)+//; |
56cd2ef8 FC |
1589 | |
1590 | if (my $type = $self->find_our_type($text)) { | |
1591 | $our_local .= ' ' . $type; | |
1592 | } | |
8e3542b6 | 1593 | } |
c8ec376c FC |
1594 | return $need_parens ? "($text)" : $text |
1595 | if $self->{'avoid_local'}{$$op}; | |
1596 | if ($need_parens) { | |
1597 | return "$our_local($text)"; | |
d2a5d473 | 1598 | } elsif (want_scalar($op) || $our_local eq 'our') { |
ce4e655d | 1599 | return "$our_local $text"; |
e8d3f51b | 1600 | } else { |
ce4e655d | 1601 | return $self->maybe_parens_func("$our_local", $text, $cx, 16); |
e8d3f51b | 1602 | } |
6e90668e | 1603 | } else { |
c8ec376c | 1604 | return $need_parens ? "($text)" : $text; |
a798dbf2 | 1605 | } |
a798dbf2 MB |
1606 | } |
1607 | ||
3ed82cfc GS |
1608 | sub maybe_targmy { |
1609 | my $self = shift; | |
1610 | my($op, $cx, $func, @args) = @_; | |
1611 | if ($op->private & OPpTARGET_MY) { | |
1612 | my $var = $self->padname($op->targ); | |
1613 | my $val = $func->($self, $op, 7, @args); | |
1614 | return $self->maybe_parens("$var = $val", $cx, 7); | |
1615 | } else { | |
1616 | return $func->($self, $op, $cx, @args); | |
1617 | } | |
1618 | } | |
1619 | ||
6e90668e SM |
1620 | sub padname_sv { |
1621 | my $self = shift; | |
1622 | my $targ = shift; | |
d989cdac | 1623 | return $self->{'curcv'}->PADLIST->ARRAYelt(0)->ARRAYelt($targ); |
6e90668e SM |
1624 | } |
1625 | ||
1626 | sub maybe_my { | |
1627 | my $self = shift; | |
8db6f480 | 1628 | my($op, $cx, $text, $padname, $forbid_parens) = @_; |
c8ec376c FC |
1629 | # The @a in \(@a) isn't in ref context, but only when the |
1630 | # parens are there. | |
1631 | my $need_parens = !$forbid_parens && $self->{'in_refgen'} | |
1632 | && $op->name =~ /[ah]v\z/ | |
1633 | && ($op->flags & (OPf_PARENS|OPf_REF)) == OPf_PARENS; | |
0ed5b3c8 FC |
1634 | # The @a in \my @a must not have parens. |
1635 | if (!$need_parens && $self->{'in_refgen'}) { | |
1636 | $forbid_parens = 1; | |
1637 | } | |
4c1f658f | 1638 | if ($op->private & OPpLVAL_INTRO and not $self->{'avoid_local'}{$$op}) { |
bcff4148 FC |
1639 | # Check $padname->FLAGS for statehood, rather than $op->private, |
1640 | # because enteriter ops do not carry the flag. | |
3188a821 | 1641 | my $my = |
bcff4148 | 1642 | $self->keyword($padname->FLAGS & SVpad_STATE ? "state" : "my"); |
56cd2ef8 FC |
1643 | if ($padname->FLAGS & SVpad_TYPED) { |
1644 | $my .= ' ' . $padname->SvSTASH->NAME; | |
1645 | } | |
c8ec376c FC |
1646 | if ($need_parens) { |
1647 | return "$my($text)"; | |
1648 | } elsif ($forbid_parens || want_scalar($op)) { | |
3462b4ac | 1649 | return "$my $text"; |
e8d3f51b | 1650 | } else { |
3462b4ac | 1651 | return $self->maybe_parens_func($my, $text, $cx, 16); |
e8d3f51b | 1652 | } |
6e90668e | 1653 | } else { |
c8ec376c | 1654 | return $need_parens ? "($text)" : $text; |
6e90668e SM |
1655 | } |
1656 | } | |
1657 | ||
9d2c6865 SM |
1658 | # The following OPs don't have functions: |
1659 | ||
1660 | # pp_padany -- does not exist after parsing | |
9d2c6865 | 1661 | |
2ae48fff RGS |
1662 | sub AUTOLOAD { |
1663 | if ($AUTOLOAD =~ s/^.*::pp_//) { | |
5e8c3db2 FC |
1664 | warn "unexpected OP_". |
1665 | ($_[1]->type == OP_CUSTOM ? "CUSTOM ($AUTOLOAD)" : uc $AUTOLOAD); | |
2ae48fff RGS |
1666 | return "XXX"; |
1667 | } else { | |
1668 | die "Undefined subroutine $AUTOLOAD called"; | |
1669 | } | |
9d2c6865 | 1670 | } |
6e90668e | 1671 | |
611c1e95 IZ |
1672 | sub DESTROY {} # Do not AUTOLOAD |
1673 | ||
ce4e655d RH |
1674 | # $root should be the op which represents the root of whatever |
1675 | # we're sequencing here. If it's undefined, then we don't append | |
1676 | # any subroutine declarations to the deparsed ops, otherwise we | |
1677 | # append appropriate declarations. | |
58cccf98 | 1678 | sub lineseq { |
93a8ff62 | 1679 | my($self, $root, $cx, @ops) = @_; |
58cccf98 | 1680 | my($expr, @exprs); |
ce4e655d RH |
1681 | |
1682 | my $out_cop = $self->{'curcop'}; | |
1683 | my $out_seq = defined($out_cop) ? $out_cop->cop_seq : undef; | |
1684 | my $limit_seq; | |
1685 | if (defined $root) { | |
1686 | $limit_seq = $out_seq; | |
76df5e8f DM |
1687 | my $nseq; |
1688 | $nseq = $self->find_scope_st($root->sibling) if ${$root->sibling}; | |
ce4e655d RH |
1689 | $limit_seq = $nseq if !defined($limit_seq) |
1690 | or defined($nseq) && $nseq < $limit_seq; | |
1691 | } | |
1692 | $limit_seq = $self->{'limit_seq'} | |
1693 | if defined($self->{'limit_seq'}) | |
1694 | && (!defined($limit_seq) || $self->{'limit_seq'} < $limit_seq); | |
1695 | local $self->{'limit_seq'} = $limit_seq; | |
09d856fb CK |
1696 | |
1697 | $self->walk_lineseq($root, \@ops, | |
1698 | sub { push @exprs, $_[0]} ); | |
1699 | ||
93a8ff62 FC |
1700 | my $sep = $cx ? '; ' : ";\n"; |
1701 | my $body = join($sep, grep {length} @exprs); | |
ce4e655d | 1702 | my $subs = ""; |
67fc2416 | 1703 | if (defined $root && defined $limit_seq && !$self->{'in_format'}) { |
ce4e655d RH |
1704 | $subs = join "\n", $self->seq_subs($limit_seq); |
1705 | } | |
93a8ff62 | 1706 | return join($sep, grep {length} $body, $subs); |
6e90668e SM |
1707 | } |
1708 | ||
58cccf98 | 1709 | sub scopeop { |
d989cdac | 1710 | my($real_block, $self, $op, $cx) = @_; |
58cccf98 SM |
1711 | my $kid; |
1712 | my @kids; | |
a0405c92 | 1713 | |
0ced6c29 RGS |
1714 | local(@$self{qw'curstash warnings hints hinthash'}) |
1715 | = @$self{qw'curstash warnings hints hinthash'} if $real_block; | |
58cccf98 SM |
1716 | if ($real_block) { |
1717 | $kid = $op->first->sibling; # skip enter | |
1718 | if (is_miniwhile($kid)) { | |
1719 | my $top = $kid->first; | |
1720 | my $name = $top->name; | |
1721 | if ($name eq "and") { | |
7741ceed | 1722 | $name = $self->keyword("while"); |
58cccf98 | 1723 | } elsif ($name eq "or") { |
7741ceed | 1724 | $name = $self->keyword("until"); |
58cccf98 | 1725 | } else { # no conditional -> while 1 or until 0 |
7741ceed FC |
1726 | return $self->deparse($top->first, 1) . " " |
1727 | . $self->keyword("while") . " 1"; | |
58cccf98 SM |
1728 | } |
1729 | my $cond = $top->first; | |
1730 | my $body = $cond->sibling->first; # skip lineseq | |
1731 | $cond = $self->deparse($cond, 1); | |
1732 | $body = $self->deparse($body, 1); | |
1733 | return "$body $name $cond"; | |
6e90668e | 1734 | } |
58cccf98 SM |
1735 | } else { |
1736 | $kid = $op->first; | |
1737 | } | |
1738 | for (; !null($kid); $kid = $kid->sibling) { | |
1739 | push @kids, $kid; | |
6e90668e | 1740 | } |
d989cdac | 1741 | if ($cx > 0) { # inside an expression, (a do {} while for lineseq) |
73582821 | 1742 | my $body = $self->lineseq($op, 0, @kids); |
3188a821 FC |
1743 | return is_lexical_subs(@kids) |
1744 | ? $body | |
1745 | : ($self->lex_in_scope("&do") ? "CORE::do" : "do") | |
1746 | . " {\n\t$body\n\b}"; | |
9d2c6865 | 1747 | } else { |
93a8ff62 | 1748 | my $lineseq = $self->lineseq($op, $cx, @kids); |
7a9b44b9 | 1749 | return (length ($lineseq) ? "$lineseq;" : ""); |
6e90668e | 1750 | } |
6e90668e SM |
1751 | } |
1752 | ||
ce4e655d | 1753 | sub pp_scope { scopeop(0, @_); } |
58cccf98 SM |
1754 | sub pp_lineseq { scopeop(0, @_); } |
1755 | sub pp_leave { scopeop(1, @_); } | |
9d2c6865 | 1756 | |
d989cdac SM |
1757 | # This is a special case of scopeop and lineseq, for the case of the |
1758 | # main_root. The difference is that we print the output statements as | |
1759 | # soon as we get them, for the sake of impatient users. | |
1760 | sub deparse_root { | |
1761 | my $self = shift; | |
1762 | my($op) = @_; | |
0ced6c29 RGS |
1763 | local(@$self{qw'curstash warnings hints hinthash'}) |
1764 | = @$self{qw'curstash warnings hints hinthash'}; | |
d989cdac | 1765 | my @kids; |
4ca8de37 | 1766 | return if null $op->first; # Can happen, e.g., for Bytecode without -k |
d989cdac SM |
1767 | for (my $kid = $op->first->sibling; !null($kid); $kid = $kid->sibling) { |
1768 | push @kids, $kid; | |
1769 | } | |
09d856fb | 1770 | $self->walk_lineseq($op, \@kids, |
4b1385ee | 1771 | sub { return unless length $_[0]; |
5e617af5 | 1772 | print $self->indent($_[0].';'); |
4b1385ee | 1773 | print "\n" |
5e617af5 | 1774 | unless $_[1] == $#kids; |
09d856fb CK |
1775 | }); |
1776 | } | |
1777 | ||
1778 | sub walk_lineseq { | |
1779 | my ($self, $op, $kids, $callback) = @_; | |
1780 | my @kids = @$kids; | |
d989cdac SM |
1781 | for (my $i = 0; $i < @kids; $i++) { |
1782 | my $expr = ""; | |
1783 | if (is_state $kids[$i]) { | |
09d856fb | 1784 | $expr = $self->deparse($kids[$i++], 0); |
d989cdac | 1785 | if ($i > $#kids) { |
09d856fb | 1786 | $callback->($expr, $i); |
d989cdac SM |
1787 | last; |
1788 | } | |
1789 | } | |
1790 | if (is_for_loop($kids[$i])) { | |
eae48c89 Z |
1791 | $callback->($expr . $self->for_loop($kids[$i], 0), |
1792 | $i += $kids[$i]->sibling->name eq "unstack" ? 2 : 1); | |
d989cdac SM |
1793 | next; |
1794 | } | |
6b6b21da | 1795 | my $expr2 = $self->deparse($kids[$i], (@kids != 1)/2); |
34b54951 | 1796 | $expr2 =~ s/^sub :(?!:)/+sub :/; # statement label otherwise |
6b6b21da | 1797 | $expr .= $expr2; |
09d856fb | 1798 | $callback->($expr, $i); |
d989cdac SM |
1799 | } |
1800 | } | |
1801 | ||
6e90668e SM |
1802 | # The BEGIN {} is used here because otherwise this code isn't executed |
1803 | # when you run B::Deparse on itself. | |
1804 | my %globalnames; | |
1805 | BEGIN { map($globalnames{$_}++, "SIG", "STDIN", "STDOUT", "STDERR", "INC", | |
1806 | "ENV", "ARGV", "ARGVOUT", "_"); } | |
1807 | ||
1808 | sub gv_name { | |
1809 | my $self = shift; | |
1810 | my $gv = shift; | |
b89b7257 | 1811 | my $raw = shift; |
32cc5cd1 FC |
1812 | #Carp::confess() unless ref($gv) eq "B::GV"; |
1813 | my $cv = $gv->FLAGS & SVf_ROK ? $gv->RV : 0; | |
1814 | my $stash = ($cv || $gv)->STASH->NAME; | |
1815 | my $name = $raw | |
1816 | ? $cv ? $cv->NAME_HEK || $cv->GV->NAME : $gv->NAME | |
1817 | : $cv | |
1818 | ? B::safename($cv->NAME_HEK || $cv->GV->NAME) | |
1819 | : $gv->SAFENAME; | |
8b2d6640 FC |
1820 | if ($stash eq 'main' && $name =~ /^::/) { |
1821 | $stash = '::'; | |
1822 | } | |
b861b87f FC |
1823 | elsif (($stash eq 'main' |
1824 | && ($globalnames{$name} || $name =~ /^[^A-Za-z_:]/)) | |
8b2d6640 FC |
1825 | or ($stash eq $self->{'curstash'} && !$globalnames{$name} |
1826 | && ($stash eq 'main' || $name !~ /::/)) | |
b861b87f | 1827 | ) |
9d2c6865 | 1828 | { |
6e90668e SM |
1829 | $stash = ""; |
1830 | } else { | |
1831 | $stash = $stash . "::"; | |
a798dbf2 | 1832 | } |
b89b7257 | 1833 | if (!$raw and $name =~ /^(\^..|{)/) { |
083bda02 | 1834 | $name = "{$name}"; # ${^WARNING_BITS}, etc and ${ |
6e90668e SM |
1835 | } |
1836 | return $stash . $name; | |
a798dbf2 MB |
1837 | } |
1838 | ||
8510e997 | 1839 | # Return the name to use for a stash variable. |
415d4c68 FC |
1840 | # If a lexical with the same name is in scope, or |
1841 | # if strictures are enabled, it may need to be | |
8510e997 RH |
1842 | # fully-qualified. |
1843 | sub stash_variable { | |
bb8996b8 | 1844 | my ($self, $prefix, $name, $cx) = @_; |
8510e997 | 1845 | |
dd666160 | 1846 | return $prefix.$self->maybe_qualify($prefix, $name) if $name =~ /::/; |
8510e997 | 1847 | |
d49c3562 | 1848 | unless ($prefix eq '$' || $prefix eq '@' || $prefix eq '&' || #' |
8510e997 RH |
1849 | $prefix eq '%' || $prefix eq '$#') { |
1850 | return "$prefix$name"; | |
1851 | } | |
1852 | ||
b6bba886 | 1853 | if ($name =~ /^[^[:alpha:]_+-]$/) { |
61154ac0 FC |
1854 | if (defined $cx && $cx == 26) { |
1855 | if ($prefix eq '@') { | |
bb8996b8 HY |
1856 | return "$prefix\{$name}"; |
1857 | } | |
61154ac0 FC |
1858 | elsif ($name eq '#') { return '${#}' } # "${#}a" vs "$#a" |
1859 | } | |
1860 | if ($prefix eq '$#') { | |
6ec73527 | 1861 | return "\$#{$name}"; |
61154ac0 | 1862 | } |
6ec73527 | 1863 | } |
bb8996b8 | 1864 | |
415d4c68 | 1865 | return $prefix . $self->maybe_qualify($prefix, $name); |
8510e997 RH |
1866 | } |
1867 | ||
93e453e2 KW |
1868 | my %unctrl = # portable to EBCDIC |
1869 | ( | |
dd405ed7 KW |
1870 | "\c@" => '@', # unused |
1871 | "\cA" => 'A', | |
1872 | "\cB" => 'B', | |
1873 | "\cC" => 'C', | |
1874 | "\cD" => 'D', | |
1875 | "\cE" => 'E', | |
1876 | "\cF" => 'F', | |
1877 | "\cG" => 'G', | |
1878 | "\cH" => 'H', | |
1879 | "\cI" => 'I', | |
1880 | "\cJ" => 'J', | |
1881 | "\cK" => 'K', | |
1882 | "\cL" => 'L', | |
1883 | "\cM" => 'M', | |
1884 | "\cN" => 'N', | |
1885 | "\cO" => 'O', | |
1886 | "\cP" => 'P', | |
1887 | "\cQ" => 'Q', | |
1888 | "\cR" => 'R', | |
1889 | "\cS" => 'S', | |
1890 | "\cT" => 'T', | |
1891 | "\cU" => 'U', | |
1892 | "\cV" => 'V', | |
1893 | "\cW" => 'W', | |
1894 | "\cX" => 'X', | |
1895 | "\cY" => 'Y', | |
1896 | "\cZ" => 'Z', | |
1897 | "\c[" => '[', # unused | |
1898 | "\c\\" => '\\', # unused | |
1899 | "\c]" => ']', # unused | |
1900 | "\c_" => '_', # unused | |
93e453e2 KW |
1901 | ); |
1902 | ||
be6cf5cf FC |
1903 | # Return just the name, without the prefix. It may be returned as a quoted |
1904 | # string. The second return value is a boolean indicating that. | |
1905 | sub stash_variable_name { | |
1906 | my($self, $prefix, $gv) = @_; | |
1907 | my $name = $self->gv_name($gv, 1); | |
415d4c68 | 1908 | $name = $self->maybe_qualify($prefix,$name); |
be6cf5cf | 1909 | if ($name =~ /^(?:\S|(?!\d)[\ca-\cz]?(?:\w|::)*|\d+)\z/) { |
dd405ed7 | 1910 | $name =~ s/^([\ca-\cz])/'^' . $unctrl{$1}/e; |
be6cf5cf FC |
1911 | $name =~ /^(\^..|{)/ and $name = "{$name}"; |
1912 | return $name, 0; # not quoted | |
1913 | } | |
1914 | else { | |
7741ceed | 1915 | single_delim("q", "'", $name, $self), 1; |
be6cf5cf FC |
1916 | } |
1917 | } | |
1918 | ||
415d4c68 FC |
1919 | sub maybe_qualify { |
1920 | my ($self,$prefix,$name) = @_; | |
1921 | my $v = ($prefix eq '$#' ? '@' : $prefix) . $name; | |
dd666160 Z |
1922 | if ($prefix eq "") { |
1923 | $name .= "::" if $name =~ /(?:\ACORE::[^:]*|::)\z/; | |
1924 | return $name; | |
1925 | } | |
1926 | return $name if $name =~ /::/; | |
415d4c68 FC |
1927 | return $self->{'curstash'}.'::'. $name |
1928 | if | |
36727b53 FC |
1929 | $name =~ /^(?!\d)\w/ # alphabetic |
1930 | && $v !~ /^\$[ab]\z/ # not $a or $b | |
257296eb | 1931 | && $v =~ /\A[\$\@\%\&]/ # scalar, array, hash, or sub |
415d4c68 FC |
1932 | && !$globalnames{$name} # not a global name |
1933 | && $self->{hints} & $strict_bits{vars} # strict vars | |
1934 | && !$self->lex_in_scope($v,1) # no "our" | |
1935 | or $self->lex_in_scope($v); # conflicts with "my" variable | |
1936 | return $name; | |
1937 | } | |
1938 | ||
8510e997 | 1939 | sub lex_in_scope { |
415d4c68 FC |
1940 | my ($self, $name, $our) = @_; |
1941 | substr $name, 0, 0, = $our ? 'o' : 'm'; # our/my | |
8510e997 RH |
1942 | $self->populate_curcvlex() if !defined $self->{'curcvlex'}; |
1943 | ||
6ec152c3 | 1944 | return 0 if !defined($self->{'curcop'}); |
8510e997 RH |
1945 | my $seq = $self->{'curcop'}->cop_seq; |
1946 | return 0 if !exists $self->{'curcvlex'}{$name}; | |
1947 | for my $a (@{$self->{'curcvlex'}{$name}}) { | |
1948 | my ($st, $en) = @$a; | |
1949 | return 1 if $seq > $st && $seq <= $en; | |
1950 | } | |
1951 | return 0; | |
1952 | } | |
1953 | ||
1954 | sub populate_curcvlex { | |
1955 | my $self = shift; | |
ce4e655d | 1956 | for (my $cv = $self->{'curcv'}; class($cv) eq "CV"; $cv = $cv->OUTSIDE) { |
7dafbf52 DM |
1957 | my $padlist = $cv->PADLIST; |
1958 | # an undef CV still in lexical chain | |
1959 | next if class($padlist) eq "SPECIAL"; | |
1960 | my @padlist = $padlist->ARRAY; | |
8510e997 RH |
1961 | my @ns = $padlist[0]->ARRAY; |
1962 | ||
1963 | for (my $i=0; $i<@ns; ++$i) { | |
1964 | next if class($ns[$i]) eq "SPECIAL"; | |
0f2fe21d RH |
1965 | if (class($ns[$i]) eq "PV") { |
1966 | # Probably that pesky lexical @_ | |
1967 | next; | |
1968 | } | |
8510e997 | 1969 | my $name = $ns[$i]->PVX; |
679f2252 | 1970 | next unless defined $name; |
7dafbf52 DM |
1971 | my ($seq_st, $seq_en) = |
1972 | ($ns[$i]->FLAGS & SVf_FAKE) | |
1973 | ? (0, 999999) | |
809abb02 | 1974 | : ($ns[$i]->COP_SEQ_RANGE_LOW, $ns[$i]->COP_SEQ_RANGE_HIGH); |
8510e997 | 1975 | |
415d4c68 FC |
1976 | push @{$self->{'curcvlex'}{ |
1977 | ($ns[$i]->FLAGS & SVpad_OUR ? 'o' : 'm') . $name | |
56cd2ef8 | 1978 | }}, [$seq_st, $seq_en, $ns[$i]]; |
8510e997 RH |
1979 | } |
1980 | } | |
1981 | } | |
1982 | ||
ce4e655d RH |
1983 | sub find_scope_st { ((find_scope(@_))[0]); } |
1984 | sub find_scope_en { ((find_scope(@_))[1]); } | |
1985 | ||
1986 | # Recurses down the tree, looking for pad variable introductions and COPs | |
1987 | sub find_scope { | |
1988 | my ($self, $op, $scope_st, $scope_en) = @_; | |
ff97752d | 1989 | carp("Undefined op in find_scope") if !defined $op; |
ce4e655d RH |
1990 | return ($scope_st, $scope_en) unless $op->flags & OPf_KIDS; |
1991 | ||
b6b46d6f AB |
1992 | my @queue = ($op); |
1993 | while(my $op = shift @queue ) { | |
1994 | for (my $o=$op->first; $$o; $o=$o->sibling) { | |
1995 | if ($o->name =~ /^pad.v$/ && $o->private & OPpLVAL_INTRO) { | |
1996 | my $s = int($self->padname_sv($o->targ)->COP_SEQ_RANGE_LOW); | |
1997 | my $e = $self->padname_sv($o->targ)->COP_SEQ_RANGE_HIGH; | |
1998 | $scope_st = $s if !defined($scope_st) || $s < $scope_st; | |
1999 | $scope_en = $e if !defined($scope_en) || $e > $scope_en; | |
2000 | return ($scope_st, $scope_en); | |
2001 | } | |
2002 | elsif (is_state($o)) { | |
2003 | my $c = $o->cop_seq; | |
2004 | $scope_st = $c if !defined($scope_st) || $c < $scope_st; | |
2005 | $scope_en = $c if !defined($scope_en) || $c > $scope_en; | |
2006 | return ($scope_st, $scope_en); | |
2007 | } | |
2008 | elsif ($o->flags & OPf_KIDS) { | |
2009 | unshift (@queue, $o); | |
2010 | } | |
34a48b4b RH |
2011 | } |
2012 | } | |
ce4e655d RH |
2013 | |
2014 | return ($scope_st, $scope_en); | |
34a48b4b RH |
2015 | } |
2016 | ||
2017 | # Returns a list of subs which should be inserted before the COP | |
2018 | sub cop_subs { | |
2019 | my ($self, $op, $out_seq) = @_; | |
2020 | my $seq = $op->cop_seq; | |
34a48b4b RH |
2021 | $seq = $out_seq if defined($out_seq) && $out_seq < $seq; |
2022 | return $self->seq_subs($seq); | |
2023 | } | |
2024 | ||
2025 | sub seq_subs { | |
2026 | my ($self, $seq) = @_; | |
2027 | my @text; | |
2028 | #push @text, "# ($seq)\n"; | |
2029 | ||
ce4e655d | 2030 | return "" if !defined $seq; |
d88d1fe0 | 2031 | my @pending; |
34a48b4b RH |
2032 | while (scalar(@{$self->{'subs_todo'}}) |
2033 | and $seq > $self->{'subs_todo'}[0][0]) { | |
d88d1fe0 | 2034 | my $cv = $self->{'subs_todo'}[0][1]; |
d4f1bfe7 FC |
2035 | # Skip the OUTSIDE check for lexical subs. We may be deparsing a |
2036 | # cloned anon sub with lexical subs declared in it, in which case | |
2037 | # the OUTSIDE pointer points to the anon protosub. | |
c310a5ab | 2038 | my $lexical = ref $self->{'subs_todo'}[0][3]; |
d4f1bfe7 FC |
2039 | my $outside = !$lexical && $cv && $cv->OUTSIDE; |
2040 | if (!$lexical and $cv | |
2041 | and ${$cv->OUTSIDE || \0} != ${$self->{'curcv'}}) | |
2042 | { | |
d88d1fe0 FC |
2043 | push @pending, shift @{$self->{'subs_todo'}}; |
2044 | next; | |
2045 | } | |
34a48b4b RH |
2046 | push @text, $self->next_todo; |
2047 | } | |
d88d1fe0 | 2048 | unshift @{$self->{'subs_todo'}}, @pending; |
34a48b4b RH |
2049 | return @text; |
2050 | } | |
2051 | ||
95c04cde NC |
2052 | sub _features_from_bundle { |
2053 | my ($hints, $hh) = @_; | |
1873980a | 2054 | foreach (@{$feature::feature_bundle{@feature::hint_bundles[$hints >> $feature::hint_shift]}}) { |
95c04cde NC |
2055 | $hh->{$feature::feature{$_}} = 1; |
2056 | } | |
2057 | return $hh; | |
2058 | } | |
2059 | ||
d5994d07 DM |
2060 | # generate any pragmas, 'package foo' etc needed to synchronise |
2061 | # with the given cop | |
2062 | ||
2063 | sub pragmata { | |
6e90668e | 2064 | my $self = shift; |
d5994d07 DM |
2065 | my($op) = @_; |
2066 | ||
6e90668e | 2067 | my @text; |
bc304ab2 | 2068 | |
11faa288 | 2069 | my $stash = $op->stashpv; |
6e90668e | 2070 | if ($stash ne $self->{'curstash'}) { |
7741ceed | 2071 | push @text, $self->keyword("package") . " $stash;\n"; |
6e90668e SM |
2072 | $self->{'curstash'} = $stash; |
2073 | } | |
08c6f5ec | 2074 | |
7a9b44b9 RH |
2075 | my $warnings = $op->warnings; |
2076 | my $warning_bits; | |
2077 | if ($warnings->isa("B::SPECIAL") && $$warnings == 4) { | |
810aef70 | 2078 | $warning_bits = $warnings::Bits{"all"} & WARN_MASK; |
7a9b44b9 | 2079 | } |
e31885a0 | 2080 | elsif ($warnings->isa("B::SPECIAL") && $$warnings == 5) { |
810aef70 | 2081 | $warning_bits = $warnings::NONE; |
7a9b44b9 | 2082 | } |
e31885a0 RH |
2083 | elsif ($warnings->isa("B::SPECIAL")) { |
2084 | $warning_bits = undef; | |
2085 | } | |
7a9b44b9 | 2086 | else { |
34a48b4b | 2087 | $warning_bits = $warnings->PV & WARN_MASK; |
7a9b44b9 RH |
2088 | } |
2089 | ||
e31885a0 RH |
2090 | if (defined ($warning_bits) and |
2091 | !defined($self->{warnings}) || $self->{'warnings'} ne $warning_bits) { | |
7741ceed FC |
2092 | push @text, |
2093 | $self->declare_warnings($self->{'warnings'}, $warning_bits); | |
7a9b44b9 RH |
2094 | $self->{'warnings'} = $warning_bits; |
2095 | } | |
2096 | ||
843835bc | 2097 | my $hints = $op->hints; |
0bb01b05 | 2098 | my $old_hints = $self->{'hints'}; |
2be95ceb | 2099 | if ($self->{'hints'} != $hints) { |
7741ceed | 2100 | push @text, $self->declare_hints($self->{'hints'}, $hints); |
2be95ceb | 2101 | $self->{'hints'} = $hints; |
a0405c92 RH |
2102 | } |
2103 | ||
0bb01b05 | 2104 | my $newhh; |
843835bc | 2105 | $newhh = $op->hints_hash->HASH; |
0bb01b05 | 2106 | |
843835bc | 2107 | { |
0bb01b05 | 2108 | # feature bundle hints |
149758b3 NC |
2109 | my $from = $old_hints & $feature::hint_mask; |
2110 | my $to = $ hints & $feature::hint_mask; | |
0bb01b05 | 2111 | if ($from != $to) { |
149758b3 | 2112 | if ($to == $feature::hint_mask) { |
0bb01b05 FC |
2113 | if ($self->{'hinthash'}) { |
2114 | delete $self->{'hinthash'}{$_} | |
2115 | for grep /^feature_/, keys %{$self->{'hinthash'}}; | |
2116 | } | |
2117 | else { $self->{'hinthash'} = {} } | |
95c04cde NC |
2118 | $self->{'hinthash'} |
2119 | = _features_from_bundle($from, $self->{'hinthash'}); | |
0bb01b05 FC |
2120 | } |
2121 | else { | |
2122 | my $bundle = | |
2123 | $feature::hint_bundles[$to >> $feature::hint_shift]; | |
2124 | $bundle =~ s/(\d[13579])\z/$1+1/e; # 5.11 => 5.12 | |
7741ceed | 2125 | push @text, |
127ce1cd | 2126 | $self->keyword("no") . " feature ':all';\n", |
7741ceed | 2127 | $self->keyword("use") . " feature ':$bundle';\n"; |
0bb01b05 FC |
2128 | } |
2129 | } | |
2130 | } | |
2131 | ||
843835bc | 2132 | { |
7741ceed | 2133 | push @text, $self->declare_hinthash( |
0bb01b05 FC |
2134 | $self->{'hinthash'}, $newhh, |
2135 | $self->{indent_size}, $self->{hints}, | |
2136 | ); | |
2137 | $self->{'hinthash'} = $newhh; | |
0ced6c29 RGS |
2138 | } |
2139 | ||
d5994d07 DM |
2140 | return join("", @text); |
2141 | } | |
2142 | ||
2143 | ||
2144 | # Notice how subs and formats are inserted between statements here; | |
2145 | # also $[ assignments and pragmas. | |
2146 | sub pp_nextstate { | |
2147 | my $self = shift; | |
2148 | my($op, $cx) = @_; | |
2149 | $self->{'curcop'} = $op; | |
2150 | ||
e276dec7 | 2151 | my @text; |
d5994d07 | 2152 | |
bc304ab2 DM |
2153 | my @subs = $self->cop_subs($op); |
2154 | if (@subs) { | |
2155 | # Special marker to swallow up the semicolon | |
2156 | push @subs, "\cK"; | |
2157 | } | |
2158 | push @text, @subs; | |
2159 | ||
e276dec7 | 2160 | push @text, $self->pragmata($op); |
d5994d07 | 2161 | |
bc304ab2 | 2162 | |
d989cdac SM |
2163 | # This should go after of any branches that add statements, to |
2164 | # increase the chances that it refers to the same line it did in | |
2165 | # the original program. | |
e56a605e | 2166 | if ($self->{'linenums'} && $cx != .5) { # $cx == .5 means in a format |
d989cdac SM |
2167 | push @text, "\f#line " . $op->line . |
2168 | ' "' . $op->file, qq'"\n'; | |
2169 | } | |
2170 | ||
98a1a137 Z |
2171 | push @text, $op->label . ": " if $op->label; |
2172 | ||
6e90668e SM |
2173 | return join("", @text); |
2174 | } | |
2175 | ||
08c6f5ec | 2176 | sub declare_warnings { |
7741ceed | 2177 | my ($self, $from, $to) = @_; |
66cc68c1 DM |
2178 | $from //= ''; |
2179 | my $all = (warnings::bits("all") & WARN_MASK); | |
2180 | unless ((($from & WARN_MASK) & ~$all) =~ /[^\0]/) { | |
2181 | # no FATAL bits need turning off | |
2182 | if ( ($to & WARN_MASK) eq $all) { | |
2183 | return $self->keyword("use") . " warnings;\n"; | |
2184 | } | |
2185 | elsif (($to & WARN_MASK) eq ("\0"x length($to) & WARN_MASK)) { | |
2186 | return $self->keyword("no") . " warnings;\n"; | |
2187 | } | |
a0405c92 | 2188 | } |
66cc68c1 | 2189 | |
74b899ae KW |
2190 | return "BEGIN {\${^WARNING_BITS} = \"" |
2191 | . join("", map { sprintf("\\x%02x", ord $_) } split "", $to) | |
2192 | . "\"}\n\cK"; | |
a0405c92 RH |
2193 | } |
2194 | ||
2195 | sub declare_hints { | |
7741ceed | 2196 | my ($self, $from, $to) = @_; |
a0035eb8 RH |
2197 | my $use = $to & ~$from; |
2198 | my $no = $from & ~$to; | |
2199 | my $decls = ""; | |
2200 | for my $pragma (hint_pragmas($use)) { | |
7741ceed | 2201 | $decls .= $self->keyword("use") . " $pragma;\n"; |
a0035eb8 RH |
2202 | } |
2203 | for my $pragma (hint_pragmas($no)) { | |
7741ceed | 2204 | $decls .= $self->keyword("no") . " $pragma;\n"; |
a0035eb8 RH |
2205 | } |
2206 | return $decls; | |
2207 | } | |
2208 | ||
493c23c6 NC |
2209 | # Internal implementation hints that the core sets automatically, so don't need |
2210 | # (or want) to be passed back to the user | |
2211 | my %ignored_hints = ( | |
2212 | 'open<' => 1, | |
2213 | 'open>' => 1, | |
dca6062a | 2214 | ':' => 1, |
1c74777c FC |
2215 | 'strict/refs' => 1, |
2216 | 'strict/subs' => 1, | |
2217 | 'strict/vars' => 1, | |
17446f3b | 2218 | 'feature/bits' => 1, |
2e8342de | 2219 | ); |
493c23c6 | 2220 | |
a8095af7 FC |
2221 | my %rev_feature; |
2222 | ||
0ced6c29 | 2223 | sub declare_hinthash { |
7741ceed | 2224 | my ($self, $from, $to, $indent, $hints) = @_; |
a8095af7 | 2225 | my $doing_features = |
149758b3 | 2226 | ($hints & $feature::hint_mask) == $feature::hint_mask; |
0ced6c29 | 2227 | my @decls; |
a8095af7 FC |
2228 | my @features; |
2229 | my @unfeatures; # bugs? | |
0bb01b05 | 2230 | for my $key (sort keys %$to) { |
493c23c6 | 2231 | next if $ignored_hints{$key}; |
843835bc | 2232 | my $is_feature = $key =~ /^feature_/; |
a8095af7 | 2233 | next if $is_feature and not $doing_features; |
04be0204 | 2234 | if (!exists $from->{$key} or $from->{$key} ne $to->{$key}) { |
a8095af7 | 2235 | push(@features, $key), next if $is_feature; |
035146a3 | 2236 | push @decls, |
7741ceed | 2237 | qq(\$^H{) . single_delim("q", "'", $key, $self) . qq(} = ) |
035146a3 FC |
2238 | . ( |
2239 | defined $to->{$key} | |
7741ceed | 2240 | ? single_delim("q", "'", $to->{$key}, $self) |
035146a3 FC |
2241 | : 'undef' |
2242 | ) | |
04be0204 | 2243 | . qq(;); |
0ced6c29 RGS |
2244 | } |
2245 | } | |
0bb01b05 | 2246 | for my $key (sort keys %$from) { |
493c23c6 | 2247 | next if $ignored_hints{$key}; |
843835bc | 2248 | my $is_feature = $key =~ /^feature_/; |
a8095af7 | 2249 | next if $is_feature and not $doing_features; |
0ced6c29 | 2250 | if (!exists $to->{$key}) { |
a8095af7 | 2251 | push(@unfeatures, $key), next if $is_feature; |
0ced6c29 RGS |
2252 | push @decls, qq(delete \$^H{'$key'};); |
2253 | } | |
2254 | } | |
a8095af7 FC |
2255 | my @ret; |
2256 | if (@features || @unfeatures) { | |
a8095af7 FC |
2257 | if (!%rev_feature) { %rev_feature = reverse %feature::feature } |
2258 | } | |
2259 | if (@features) { | |
7741ceed | 2260 | push @ret, $self->keyword("use") . " feature " |
a8095af7 FC |
2261 | . join(", ", map "'$rev_feature{$_}'", @features) . ";\n"; |
2262 | } | |
2263 | if (@unfeatures) { | |
7741ceed | 2264 | push @ret, $self->keyword("no") . " feature " |
a8095af7 FC |
2265 | . join(", ", map "'$rev_feature{$_}'", @unfeatures) |
2266 | . ";\n"; | |
2267 | } | |
2268 | @decls and | |
2269 | push @ret, | |
5e617af5 | 2270 | join("\n" . (" " x $indent), "BEGIN {", @decls) . "\n}\n\cK"; |
a8095af7 | 2271 | return @ret; |
0ced6c29 RGS |
2272 | } |
2273 | ||
a0035eb8 RH |
2274 | sub hint_pragmas { |
2275 | my ($bits) = @_; | |
415d4c68 | 2276 | my (@pragmas, @strict); |
a0035eb8 | 2277 | push @pragmas, "integer" if $bits & 0x1; |
415d4c68 FC |
2278 | for (sort keys %strict_bits) { |
2279 | push @strict, "'$_'" if $bits & $strict_bits{$_}; | |
2280 | } | |
2281 | if (@strict == keys %strict_bits) { | |
2282 | push @pragmas, "strict"; | |
2283 | } | |
2284 | elsif (@strict) { | |
2285 | push @pragmas, "strict " . join ', ', @strict; | |
2286 | } | |
a0035eb8 RH |
2287 | push @pragmas, "bytes" if $bits & 0x8; |
2288 | return @pragmas; | |
08c6f5ec RH |
2289 | } |
2290 | ||
6e90668e | 2291 | sub pp_dbstate { pp_nextstate(@_) } |
3f872cb9 | 2292 | sub pp_setstate { pp_nextstate(@_) } |
6e90668e SM |
2293 | |
2294 | sub pp_unstack { return "" } # see also leaveloop | |
2295 | ||
80e3f4ad FC |
2296 | my %feature_keywords = ( |
2297 | # keyword => 'feature', | |
2298 | state => 'state', | |
2299 | say => 'say', | |
2300 | given => 'switch', | |
7896dde7 Z |
2301 | when => 'switch', |
2302 | default => 'switch', | |
2303 | break => 'switch', | |
7d789282 | 2304 | evalbytes=>'evalbytes', |
84ed0108 | 2305 | __SUB__ => '__SUB__', |
838f2281 | 2306 | fc => 'fc', |
a1325b90 PE |
2307 | try => 'try', |
2308 | catch => 'try', | |
f79e2ff9 | 2309 | defer => 'defer', |
80e3f4ad FC |
2310 | ); |
2311 | ||
3ac5308a DM |
2312 | # keywords that are strong and also have a prototype |
2313 | # | |
2314 | my %strong_proto_keywords = map { $_ => 1 } qw( | |
3ac5308a DM |
2315 | pos |
2316 | prototype | |
2317 | scalar | |
2318 | study | |
2319 | undef | |
2320 | ); | |
2321 | ||
a958cfbb FC |
2322 | sub feature_enabled { |
2323 | my($self,$name) = @_; | |
223b1722 | 2324 | my $hh; |
149758b3 NC |
2325 | my $hints = $self->{hints} & $feature::hint_mask; |
2326 | if ($hints && $hints != $feature::hint_mask) { | |
1873980a | 2327 | $hh = _features_from_bundle($hints); |
223b1722 FC |
2328 | } |
2329 | elsif ($hints) { $hh = $self->{'hinthash'} } | |
a958cfbb FC |
2330 | return $hh && $hh->{"feature_$feature_keywords{$name}"} |
2331 | } | |
2332 | ||
2333 | sub keyword { | |
2334 | my $self = shift; | |
2335 | my $name = shift; | |
2336 | return $name if $name =~ /^CORE::/; # just in case | |
2337 | if (exists $feature_keywords{$name}) { | |
2338 | return "CORE::$name" if not $self->feature_enabled($name); | |
80e3f4ad | 2339 | } |
7741ceed FC |
2340 | # This sub may be called for a program that has no nextstate ops. In |
2341 | # that case we may have a lexical sub named no/use/sub in scope but | |
a3815e44 | 2342 | # $self->lex_in_scope will return false because it depends on the |
7741ceed FC |
2343 | # current nextstate op. So we need this alternate method if there is |
2344 | # no current cop. | |
2345 | if (!$self->{'curcop'}) { | |
2346 | $self->populate_curcvlex() if !defined $self->{'curcvlex'}; | |
2347 | return "CORE::$name" if exists $self->{'curcvlex'}{"m&$name"} | |
2348 | || exists $self->{'curcvlex'}{"o&$name"}; | |
2349 | } elsif ($self->lex_in_scope("&$name") | |
2350 | || $self->lex_in_scope("&$name", 1)) { | |
3188a821 FC |
2351 | return "CORE::$name"; |
2352 | } | |
3ac5308a DM |
2353 | if ($strong_proto_keywords{$name} |
2354 | || ($name !~ /^(?:chom?p|do|exec|glob|s(?:elect|ystem))\z/ | |
2355 | && !defined eval{prototype "CORE::$name"}) | |
4a1ac32e FC |
2356 | ) { return $name } |
2357 | if ( | |
2358 | exists $self->{subs_declared}{$name} | |
2359 | or | |
2360 | exists &{"$self->{curstash}::$name"} | |
2361 | ) { | |
2362 | return "CORE::$name" | |
2363 | } | |
2364 | return $name; | |
2365 | } | |
2366 | ||
6e90668e SM |
2367 | sub baseop { |
2368 | my $self = shift; | |
9d2c6865 | 2369 | my($op, $cx, $name) = @_; |
4a1ac32e | 2370 | return $self->keyword($name); |
6e90668e SM |
2371 | } |
2372 | ||
ddb55548 | 2373 | sub pp_stub { "()" } |
6e90668e SM |
2374 | sub pp_wantarray { baseop(@_, "wantarray") } |
2375 | sub pp_fork { baseop(@_, "fork") } | |
3ed82cfc GS |
2376 | sub pp_wait { maybe_targmy(@_, \&baseop, "wait") } |
2377 | sub pp_getppid { maybe_targmy(@_, \&baseop, "getppid") } | |
2378 | sub pp_time { maybe_targmy(@_, \&baseop, "time") } | |
6e90668e SM |
2379 | sub pp_tms { baseop(@_, "times") } |
2380 | sub pp_ghostent { baseop(@_, "gethostent") } | |
2381 | sub pp_gnetent { baseop(@_, "getnetent") } | |
2382 | sub pp_gprotoent { baseop(@_, "getprotoent") } | |
2383 | sub pp_gservent { baseop(@_, "getservent") } | |
2384 | sub pp_ehostent { baseop(@_, "endhostent") } | |
2385 | sub pp_enetent { baseop(@_, "endnetent") } | |
2386 | sub pp_eprotoent { baseop(@_, "endprotoent") } | |
2387 | sub pp_eservent { baseop(@_, "endservent") } | |
2388 | sub pp_gpwent { baseop(@_, "getpwent") } | |
2389 | sub pp_spwent { baseop(@_, "setpwent") } | |
2390 | sub pp_epwent { baseop(@_, "endpwent") } | |
2391 | sub pp_ggrent { baseop(@_, "getgrent") } | |
2392 | sub pp_sgrent { baseop(@_, "setgrent") } | |
2393 | sub pp_egrent { baseop(@_, "endgrent") } | |
2394 | sub pp_getlogin { baseop(@_, "getlogin") } | |
2395 | ||
2396 | sub POSTFIX () { 1 } | |
2397 | ||
9d2c6865 SM |
2398 | # I couldn't think of a good short name, but this is the category of |
2399 | # symbolic unary operators with interesting precedence | |
2400 | ||
2401 | sub pfixop { | |
2402 | my $self = shift; | |
2403 | my($op, $cx, $name, $prec, $flags) = (@_, 0); | |
2404 | my $kid = $op->first; | |
2405 | $kid = $self->deparse($kid, $prec); | |
843b15cc FC |
2406 | return $self->maybe_parens(($flags & POSTFIX) |
2407 | ? "$kid$name" | |
2408 | # avoid confusion with filetests | |
2409 | : $name eq '-' | |
2410 | && $kid =~ /^[a-zA-Z](?!\w)/ | |
2411 | ? "$name($kid)" | |
2412 | : "$name$kid", | |
9d2c6865 SM |
2413 | $cx, $prec); |
2414 | } | |
2415 | ||
2416 | sub pp_preinc { pfixop(@_, "++", 23) } | |
2417 | sub pp_predec { pfixop(@_, "--", 23) } | |
3ed82cfc GS |
2418 | sub pp_postinc { maybe_targmy(@_, \&pfixop, "++", 23, POSTFIX) } |
2419 | sub pp_postdec { maybe_targmy(@_, \&pfixop, "--", 23, POSTFIX) } | |
9d2c6865 SM |
2420 | sub pp_i_preinc { pfixop(@_, "++", 23) } |
2421 | sub pp_i_predec { pfixop(@_, "--", 23) } | |
3ed82cfc GS |
2422 | sub pp_i_postinc { maybe_targmy(@_, \&pfixop, "++", 23, POSTFIX) } |
2423 | sub pp_i_postdec { maybe_targmy(@_, \&pfixop, "--", 23, POSTFIX) } | |
68cc8748 | 2424 | sub pp_complement { maybe_targmy(@_, \&pfixop, "~", 21) } |
27f31adf FC |
2425 | *pp_ncomplement = *pp_complement; |
2426 | sub pp_scomplement { maybe_targmy(@_, \&pfixop, "~.", 21) } | |
9d2c6865 | 2427 | |
3ed82cfc GS |
2428 | sub pp_negate { maybe_targmy(@_, \&real_negate) } |
2429 | sub real_negate { | |
9d2c6865 SM |
2430 | my $self = shift; |
2431 | my($op, $cx) = @_; | |
3f872cb9 | 2432 | if ($op->first->name =~ /^(i_)?negate$/) { |
9d2c6865 SM |
2433 | # avoid --$x |
2434 | $self->pfixop($op, $cx, "-", 21.5); | |
2435 | } else { | |
2436 | $self->pfixop($op, $cx, "-", 21); | |
2437 | } | |
2438 | } | |
2439 | sub pp_i_negate { pp_negate(@_) } | |
2440 | ||
2441 | sub pp_not { | |
2442 | my $self = shift; | |
2443 | my($op, $cx) = @_; | |
2444 | if ($cx <= 4) { | |
1cabb3b3 | 2445 | $self->listop($op, $cx, "not", $op->first); |
9d2c6865 SM |
2446 | } else { |
2447 | $self->pfixop($op, $cx, "!", 21); | |
2448 | } | |
2449 | } | |
2450 | ||
6e90668e SM |
2451 | sub unop { |
2452 | my $self = shift; | |
9c56d9ea | 2453 | my($op, $cx, $name, $nollafr) = @_; |
6e90668e | 2454 | my $kid; |
9d2c6865 | 2455 | if ($op->flags & OPf_KIDS) { |
aaf643ce | 2456 | $kid = $op->first; |
1c85afce YO |
2457 | if (not $name) { |
2458 | # this deals with 'boolkeys' right now | |
2459 | return $self->deparse($kid,$cx); | |
2460 | } | |
deb20ba3 RGS |
2461 | my $builtinname = $name; |
2462 | $builtinname =~ /^CORE::/ or $builtinname = "CORE::$name"; | |
2463 | if (defined prototype($builtinname) | |
9cef6114 | 2464 | && $builtinname ne 'CORE::readline' |
deb20ba3 | 2465 | && prototype($builtinname) =~ /^;?\*/ |
e31885a0 RH |
2466 | && $kid->name eq "rv2gv") { |
2467 | $kid = $kid->first; | |
2468 | } | |
2469 | ||
9c56d9ea | 2470 | if ($nollafr) { |
917a8f4f FC |
2471 | if (($kid = $self->deparse($kid, 16)) !~ s/^\cS//) { |
2472 | # require foo() is a syntax error. | |
2473 | $kid =~ /^(?!\d)\w/ and $kid = "($kid)"; | |
2474 | } | |
9c56d9ea FC |
2475 | return $self->maybe_parens( |
2476 | $self->keyword($name) . " $kid", $cx, 16 | |
2477 | ); | |
23f1d933 | 2478 | } |
9d2c6865 | 2479 | return $self->maybe_parens_unop($name, $kid, $cx); |
6e90668e | 2480 | } else { |
4d8ac5c7 FC |
2481 | return $self->maybe_parens( |
2482 | $self->keyword($name) . ($op->flags & OPf_SPECIAL ? "()" : ""), | |
2483 | $cx, 16, | |
2484 | ); | |
6e90668e | 2485 | } |
6e90668e SM |
2486 | } |
2487 | ||
3ed82cfc GS |
2488 | sub pp_chop { maybe_targmy(@_, \&unop, "chop") } |
2489 | sub pp_chomp { maybe_targmy(@_, \&unop, "chomp") } | |
2490 | sub pp_schop { maybe_targmy(@_, \&unop, "chop") } | |
2491 | sub pp_schomp { maybe_targmy(@_, \&unop, "chomp") } | |
6e90668e SM |
2492 | sub pp_defined { unop(@_, "defined") } |
2493 | sub pp_undef { unop(@_, "undef") } | |
2494 | sub pp_study { unop(@_, "study") } | |
6e90668e SM |
2495 | sub pp_ref { unop(@_, "ref") } |
2496 | sub pp_pos { maybe_local(@_, unop(@_, "pos")) } | |
2497 | ||
3ed82cfc GS |
2498 | sub pp_sin { maybe_targmy(@_, \&unop, "sin") } |
2499 | sub pp_cos { maybe_targmy(@_, \&unop, "cos") } | |
2500 | sub pp_rand { maybe_targmy(@_, \&unop, "rand") } | |
6e90668e | 2501 | sub pp_srand { unop(@_, "srand") } |
3ed82cfc GS |
2502 | sub pp_exp { maybe_targmy(@_, \&unop, "exp") } |
2503 | sub pp_log { maybe_targmy(@_, \&unop, "log") } | |
2504 | sub pp_sqrt { maybe_targmy(@_, \&unop, "sqrt") } | |
2505 | sub pp_int { maybe_targmy(@_, \&unop, "int") } | |
2506 | sub pp_hex { maybe_targmy(@_, \&unop, "hex") } | |
2507 | sub pp_oct { maybe_targmy(@_, \&unop, "oct") } | |
2508 | sub pp_abs { maybe_targmy(@_, \&unop, "abs") } | |
2509 | ||
2510 | sub pp_length { maybe_targmy(@_, \&unop, "length") } | |
2511 | sub pp_ord { maybe_targmy(@_, \&unop, "ord") } | |
2512 | sub pp_chr { maybe_targmy(@_, \&unop, "chr") } | |
6e90668e SM |
2513 | |
2514 | sub pp_each { unop(@_, "each") } | |
2515 | sub pp_values { unop(@_, "values") } | |
2516 | sub pp_keys { unop(@_, "keys") } | |
09dcfa7d | 2517 | { no strict 'refs'; *{"pp_r$_"} = *{"pp_$_"} for qw< keys each values >; } |
23f1d933 | 2518 | sub pp_boolkeys { |
1c85afce YO |
2519 | # no name because its an optimisation op that has no keyword |
2520 | unop(@_,""); | |
2521 | } | |
644741fd NC |
2522 | sub pp_aeach { unop(@_, "each") } |
2523 | sub pp_avalues { unop(@_, "values") } | |
2524 | sub pp_akeys { unop(@_, "keys") } | |
6e90668e SM |
2525 | sub pp_pop { unop(@_, "pop") } |
2526 | sub pp_shift { unop(@_, "shift") } | |
2527 | ||
2528 | sub pp_caller { unop(@_, "caller") } | |
2529 | sub pp_reset { unop(@_, "reset") } | |
2530 | sub pp_exit { unop(@_, "exit") } | |
2531 | sub pp_prototype { unop(@_, "prototype") } | |
2532 | ||
2533 | sub pp_close { unop(@_, "close") } | |
2534 | sub pp_fileno { unop(@_, "fileno") } | |
2535 | sub pp_umask { unop(@_, "umask") } | |
6e90668e SM |
2536 | sub pp_untie { unop(@_, "untie") } |
2537 | sub pp_tied { unop(@_, "tied") } | |
2538 | sub pp_dbmclose { unop(@_, "dbmclose") } | |
2539 | sub pp_getc { unop(@_, "getc") } | |
2540 | sub pp_eof { unop(@_, "eof") } | |
2541 | sub pp_tell { unop(@_, "tell") } | |
2542 | sub pp_getsockname { unop(@_, "getsockname") } | |
2543 | sub pp_getpeername { unop(@_, "getpeername") } | |
2544 | ||
0175f038 FC |
2545 | sub pp_chdir { |
2546 | my ($self, $op, $cx) = @_; | |
3c4a43a5 | 2547 | if (($op->flags & (OPf_SPECIAL|OPf_KIDS)) == (OPf_SPECIAL|OPf_KIDS)) { |
0175f038 FC |
2548 | my $kw = $self->keyword("chdir"); |
2549 | my $kid = $self->const_sv($op->first)->PV; | |
2550 | my $code = $kw | |
2551 | . ($cx >= 16 || $self->{'parens'} ? "($kid)" : " $kid"); | |
2552 | maybe_targmy(@_, sub { $_[3] }, $code); | |
2553 | } else { | |
2554 | maybe_targmy(@_, \&unop, "chdir") | |
2555 | } | |
2556 | } | |
2557 | ||
3ed82cfc | 2558 | sub pp_chroot { maybe_targmy(@_, \&unop, "chroot") } |
6e90668e | 2559 | sub pp_readlink { unop(@_, "readlink") } |
3ed82cfc | 2560 | sub pp_rmdir { maybe_targmy(@_, \&unop, "rmdir") } |
6e90668e SM |
2561 | sub pp_readdir { unop(@_, "readdir") } |
2562 | sub pp_telldir { unop(@_, "telldir") } | |
2563 | sub pp_rewinddir { unop(@_, "rewinddir") } | |
2564 | sub pp_closedir { unop(@_, "closedir") } | |
3ed82cfc | 2565 | sub pp_getpgrp { maybe_targmy(@_, \&unop, "getpgrp") } |
6e90668e SM |
2566 | sub pp_localtime { unop(@_, "localtime") } |
2567 | sub pp_gmtime { unop(@_, "gmtime") } | |
2568 | sub pp_alarm { unop(@_, "alarm") } | |
3ed82cfc | 2569 | sub pp_sleep { maybe_targmy(@_, \&unop, "sleep") } |
6e90668e | 2570 | |
94bb57f9 | 2571 | sub pp_dofile { |
9c56d9ea | 2572 | my $code = unop(@_, "do", 1); # llafr does not apply |
8b46c09b | 2573 | if ($code =~ s/^((?:CORE::)?do) \{/$1({/) { $code .= ')' } |
94bb57f9 FC |
2574 | $code; |
2575 | } | |
7d789282 FC |
2576 | sub pp_entereval { |
2577 | unop( | |
2578 | @_, | |
c7c39989 | 2579 | $_[1]->private & OPpEVAL_BYTES ? 'evalbytes' : "eval" |
7d789282 FC |
2580 | ) |
2581 | } | |
6e90668e SM |
2582 | |
2583 | sub pp_ghbyname { unop(@_, "gethostbyname") } | |
2584 | sub pp_gnbyname { unop(@_, "getnetbyname") } | |
2585 | sub pp_gpbyname { unop(@_, "getprotobyname") } | |
2586 | sub pp_shostent { unop(@_, "sethostent") } | |
2587 | sub pp_snetent { unop(@_, "setnetent") } | |
2588 | sub pp_sprotoent { unop(@_, "setprotoent") } | |
2589 | sub pp_sservent { unop(@_, "setservent") } | |
2590 | sub pp_gpwnam { unop(@_, "getpwnam") } | |
2591 | sub pp_gpwuid { unop(@_, "getpwuid") } | |
2592 | sub pp_ggrnam { unop(@_, "getgrnam") } | |
2593 | sub pp_ggrgid { unop(@_, "getgrgid") } | |
2594 | ||
2595 | sub pp_lock { unop(@_, "lock") } | |
2596 | ||
0d863452 | 2597 | sub pp_continue { unop(@_, "continue"); } |
7896dde7 | 2598 | sub pp_break { unop(@_, "break"); } |
0d863452 | 2599 | |
7896dde7 Z |
2600 | sub givwhen { |
2601 | my $self = shift; | |
2602 | my($op, $cx, $givwhen) = @_; | |
0d863452 RH |
2603 | |
2604 | my $enterop = $op->first; | |
7896dde7 Z |
2605 | my ($head, $block); |
2606 | if ($enterop->flags & OPf_SPECIAL) { | |
2607 | $head = $self->keyword("default"); | |
2608 | $block = $self->deparse($enterop->first, 0); | |
0d863452 | 2609 | } |
7896dde7 Z |
2610 | else { |
2611 | my $cond = $enterop->first; | |
2612 | my $cond_str = $self->deparse($cond, 1); | |
2613 | $head = "$givwhen ($cond_str)"; | |
2614 | $block = $self->deparse($cond->sibling, 0); | |
2615 | } | |
2616 | ||
2617 | return "$head {\n". | |
2618 | "\t$block\n". | |
2619 | "\b}\cK"; | |
0d863452 RH |
2620 | } |
2621 | ||
7896dde7 Z |
2622 | sub pp_leavegiven { givwhen(@_, $_[0]->keyword("given")); } |
2623 | sub pp_leavewhen { givwhen(@_, $_[0]->keyword("when")); } | |
2624 | ||
6e90668e SM |
2625 | sub pp_exists { |
2626 | my $self = shift; | |
9d2c6865 | 2627 | my($op, $cx) = @_; |
34a48b4b | 2628 | my $arg; |
3188a821 | 2629 | my $name = $self->keyword("exists"); |
34a48b4b RH |
2630 | if ($op->private & OPpEXISTS_SUB) { |
2631 | # Checking for the existence of a subroutine | |
3188a821 | 2632 | return $self->maybe_parens_func($name, |
34a48b4b RH |
2633 | $self->pp_rv2cv($op->first, 16), $cx, 16); |
2634 | } | |
2635 | if ($op->flags & OPf_SPECIAL) { | |
2636 | # Array element, not hash element | |
3188a821 | 2637 | return $self->maybe_parens_func($name, |
34a48b4b RH |
2638 | $self->pp_aelem($op->first, 16), $cx, 16); |
2639 | } | |
3188a821 | 2640 | return $self->maybe_parens_func($name, $self->pp_helem($op->first, 16), |
9d2c6865 | 2641 | $cx, 16); |
6e90668e SM |
2642 | } |
2643 | ||
6e90668e SM |
2644 | sub pp_delete { |
2645 | my $self = shift; | |
9d2c6865 | 2646 | my($op, $cx) = @_; |
6e90668e | 2647 | my $arg; |
3188a821 | 2648 | my $name = $self->keyword("delete"); |
ac1e5644 | 2649 | if ($op->private & (OPpSLICE|OPpKVSLICE)) { |
34a48b4b RH |
2650 | if ($op->flags & OPf_SPECIAL) { |
2651 | # Deleting from an array, not a hash | |
3188a821 | 2652 | return $self->maybe_parens_func($name, |
34a48b4b RH |
2653 | $self->pp_aslice($op->first, 16), |
2654 | $cx, 16); | |
2655 | } | |
3188a821 | 2656 | return $self->maybe_parens_func($name, |
9d2c6865 SM |
2657 | $self->pp_hslice($op->first, 16), |
2658 | $cx, 16); | |
6e90668e | 2659 | } else { |
34a48b4b RH |
2660 | if ($op->flags & OPf_SPECIAL) { |
2661 | # Deleting from an array, not a hash | |
3188a821 | 2662 | return $self->maybe_parens_func($name, |
34a48b4b RH |
2663 | $self->pp_aelem($op->first, 16), |
2664 | $cx, 16); | |
2665 | } | |
3188a821 | 2666 | return $self->maybe_parens_func($name, |
9d2c6865 SM |
2667 | $self->pp_helem($op->first, 16), |
2668 | $cx, 16); | |
6e90668e | 2669 | } |
6e90668e SM |
2670 | } |
2671 | ||
6e90668e SM |
2672 | sub pp_require { |
2673 | my $self = shift; | |
9d2c6865 | 2674 | my($op, $cx) = @_; |
d5889722 | 2675 | my $opname = $op->flags & OPf_SPECIAL ? 'CORE::require' : 'require'; |
5e7acd25 FC |
2676 | my $kid = $op->first; |
2677 | if ($kid->name eq 'const') { | |
2678 | my $priv = $kid->private; | |
2679 | my $sv = $self->const_sv($kid); | |
2680 | my $arg; | |
2681 | if ($priv & OPpCONST_BARE) { | |
2682 | $arg = $sv->PV; | |
2683 | $arg =~ s[/][::]g; | |
2684 | $arg =~ s/\.pm//g; | |
2685 | } elsif ($priv & OPpCONST_NOVER) { | |
2686 | $opname = $self->keyword('no'); | |
2687 | $arg = $self->const($sv, 16); | |
2688 | } elsif ((my $tmp = $self->const($sv, 16)) =~ /^v/) { | |
2689 | $arg = $tmp; | |
2690 | } | |
2691 | if ($arg) { | |
2692 | return $self->maybe_parens("$opname $arg", $cx, 16); | |
2693 | } | |
2694 | } | |
2695 | $self->unop( | |
41df74e3 | 2696 | $op, $cx, |
5e7acd25 | 2697 | $opname, |
41df74e3 | 2698 | 1, # llafr does not apply |
5e7acd25 | 2699 | ); |
6e90668e SM |
2700 | } |
2701 | ||
d989cdac | 2702 | sub pp_scalar { |
9d2c6865 | 2703 | my $self = shift; |
d9002312 | 2704 | my($op, $cx) = @_; |
9d2c6865 SM |
2705 | my $kid = $op->first; |
2706 | if (not null $kid->sibling) { | |
2707 | # XXX Was a here-doc | |
2708 | return $self->dquote($op); | |
2709 | } | |
2710 | $self->unop(@_, "scalar"); | |
2711 | } | |
2712 | ||
2713 | ||
6e90668e SM |
2714 | sub padval { |
2715 | my $self = shift; | |
2716 | my $targ = shift; | |
d989cdac | 2717 | return $self->{'curcv'}->PADLIST->ARRAYelt(1)->ARRAYelt($targ); |
6e90668e SM |
2718 | } |
2719 | ||
78c72037 NC |
2720 | sub anon_hash_or_list { |
2721 | my $self = shift; | |
d9002312 | 2722 | my($op, $cx) = @_; |
78c72037 NC |
2723 | |
2724 | my($pre, $post) = @{{"anonlist" => ["[","]"], | |
2725 | "anonhash" => ["{","}"]}->{$op->name}}; | |
2726 | my($expr, @exprs); | |
2727 | $op = $op->first->sibling; # skip pushmark | |
2728 | for (; !null($op); $op = $op->sibling) { | |
2729 | $expr = $self->deparse($op, 6); | |
2730 | push @exprs, $expr; | |
2731 | } | |
d9002312 SM |
2732 | if ($pre eq "{" and $cx < 1) { |
2733 | # Disambiguate that it's not a block | |
2734 | $pre = "+{"; | |
2735 | } | |
78c72037 NC |
2736 | return $pre . join(", ", @exprs) . $post; |
2737 | } | |
2738 | ||
2739 | sub pp_anonlist { | |
d9002312 SM |
2740 | my $self = shift; |
2741 | my ($op, $cx) = @_; | |
78c72037 | 2742 | if ($op->flags & OPf_SPECIAL) { |
d9002312 | 2743 | return $self->anon_hash_or_list($op, $cx); |
78c72037 NC |
2744 | } |
2745 | warn "Unexpected op pp_" . $op->name() . " without OPf_SPECIAL"; | |
2746 | return 'XXX'; | |
2747 | } | |
2748 | ||
2749 | *pp_anonhash = \&pp_anonlist; | |
2750 | ||
6e90668e SM |
2751 | sub pp_refgen { |
2752 | my $self = shift; | |
9d2c6865 | 2753 | my($op, $cx) = @_; |
6e90668e | 2754 | my $kid = $op->first; |
3f872cb9 | 2755 | if ($kid->name eq "null") { |
01762542 | 2756 | my $anoncode = $kid = $kid->first; |
b77472f9 FC |
2757 | if ($anoncode->name eq "anonconst") { |
2758 | $anoncode = $anoncode->first->first->sibling; | |
2759 | } | |
01762542 FC |
2760 | if ($anoncode->name eq "anoncode" |
2761 | or !null($anoncode = $kid->sibling) and | |
2762 | $anoncode->name eq "anoncode") { | |
2763 | return $self->e_anoncode({ code => $self->padval($anoncode->targ) }); | |
3f872cb9 GS |
2764 | } elsif ($kid->name eq "pushmark") { |
2765 | my $sib_name = $kid->sibling->name; | |
c8ec376c | 2766 | if ($sib_name eq 'entersub') { |
c8c62db7 AD |
2767 | my $text = $self->deparse($kid->sibling, 1); |
2768 | # Always show parens for \(&func()), but only with -p otherwise | |
2769 | $text = "($text)" if $self->{'parens'} | |
2770 | or $kid->sibling->private & OPpENTERSUB_AMPER; | |
2771 | return "\\$text"; | |
2772 | } | |
2773 | } | |
6e90668e | 2774 | } |
c8ec376c | 2775 | local $self->{'in_refgen'} = 1; |
9d2c6865 | 2776 | $self->pfixop($op, $cx, "\\", 20); |
6e90668e SM |
2777 | } |
2778 | ||
09d856fb CK |
2779 | sub e_anoncode { |
2780 | my ($self, $info) = @_; | |
2781 | my $text = $self->deparse_sub($info->{code}); | |
7741ceed | 2782 | return $self->keyword("sub") . " $text"; |
09d856fb CK |
2783 | } |
2784 | ||
6e90668e SM |
2785 | sub pp_srefgen { pp_refgen(@_) } |
2786 | ||
2787 | sub pp_readline { | |
2788 | my $self = shift; | |
9d2c6865 | 2789 | my($op, $cx) = @_; |
6e90668e | 2790 | my $kid = $op->first; |
18371617 LM |
2791 | if (is_scalar($kid) |
2792 | and $op->flags & OPf_SPECIAL | |
2793 | and $self->deparse($kid, 1) eq 'ARGV') | |
2794 | { | |
2795 | return '<<>>'; | |
65ef2c3e | 2796 | } |
e31885a0 | 2797 | return $self->unop($op, $cx, "readline"); |
6e90668e SM |
2798 | } |
2799 | ||
ad8caead RGS |
2800 | sub pp_rcatline { |
2801 | my $self = shift; | |
2802 | my($op) = @_; | |
d989cdac | 2803 | return "<" . $self->gv_name($self->gv_or_padgv($op)) . ">"; |
ad8caead RGS |
2804 | } |
2805 | ||
bd0865ec GS |
2806 | # Unary operators that can occur as pseudo-listops inside double quotes |
2807 | sub dq_unop { | |
2808 | my $self = shift; | |
2809 | my($op, $cx, $name, $prec, $flags) = (@_, 0, 0); | |
2810 | my $kid; | |
2811 | if ($op->flags & OPf_KIDS) { | |
2812 | $kid = $op->first; | |
2813 | # If there's more than one kid, the first is an ex-pushmark. | |
2814 | $kid = $kid->sibling if not null $kid->sibling; | |
2815 | return $self->maybe_parens_unop($name, $kid, $cx); | |
2816 | } else { | |
d989cdac | 2817 | return $name . ($op->flags & OPf_SPECIAL ? "()" : ""); |
bd0865ec GS |
2818 | } |
2819 | } | |
2820 | ||
2821 | sub pp_ucfirst { dq_unop(@_, "ucfirst") } | |
2822 | sub pp_lcfirst { dq_unop(@_, "lcfirst") } | |
2823 | sub pp_uc { dq_unop(@_, "uc") } | |
2824 | sub pp_lc { dq_unop(@_, "lc") } | |
3ed82cfc | 2825 | sub pp_quotemeta { maybe_targmy(@_, \&dq_unop, "quotemeta") } |
838f2281 | 2826 | sub pp_fc { dq_unop(@_, "fc") } |
bd0865ec | 2827 | |
6e90668e SM |
2828 | sub loopex { |
2829 | my $self = shift; | |
9d2c6865 | 2830 | my ($op, $cx, $name) = @_; |
6e90668e | 2831 | if (class($op) eq "PVOP") { |
41df74e3 | 2832 | $name .= " " . $op->pv; |
9d2c6865 | 2833 | } elsif (class($op) eq "OP") { |
41df74e3 | 2834 | # no-op |
6e90668e | 2835 | } elsif (class($op) eq "UNOP") { |
1eb0b7be | 2836 | (my $kid = $self->deparse($op->first, 7)) =~ s/^\cS//; |
df465735 FC |
2837 | # last foo() is a syntax error. |
2838 | $kid =~ /^(?!\d)\w/ and $kid = "($kid)"; | |
41df74e3 | 2839 | $name .= " $kid"; |
6e90668e | 2840 | } |
1eb0b7be | 2841 | return $self->maybe_parens($name, $cx, 7); |
6e90668e SM |
2842 | } |
2843 | ||
2844 | sub pp_last { loopex(@_, "last") } | |
2845 | sub pp_next { loopex(@_, "next") } | |
2846 | sub pp_redo { loopex(@_, "redo") } | |
2847 | sub pp_goto { loopex(@_, "goto") } | |
266da325 | 2848 | sub pp_dump { loopex(@_, "CORE::dump") } |
6e90668e SM |
2849 | |
2850 | sub ftst { | |
2851 | my $self = shift; | |
9d2c6865 | 2852 | my($op, $cx, $name) = @_; |
6e90668e | 2853 | if (class($op) eq "UNOP") { |
e38ccfd9 | 2854 | # Genuine '-X' filetests are exempt from the LLAFR, but not |
5830412d FC |
2855 | # l?stat() |
2856 | if ($name =~ /^-/) { | |
2857 | (my $kid = $self->deparse($op->first, 16)) =~ s/^\cS//; | |
2858 | return $self->maybe_parens("$name $kid", $cx, 16); | |
2859 | } | |
9d2c6865 | 2860 | return $self->maybe_parens_unop($name, $op->first, $cx); |
d989cdac | 2861 | } elsif (class($op) =~ /^(SV|PAD)OP$/) { |
9d2c6865 | 2862 | return $self->maybe_parens_func($name, $self->pp_gv($op, 1), $cx, 16); |
6e90668e | 2863 | } else { # I don't think baseop filetests ever survive ck_ftst, but... |
9d2c6865 | 2864 | return $name; |
6e90668e | 2865 | } |
6e90668e SM |
2866 | } |
2867 | ||
d989cdac SM |
2868 | sub pp_lstat { ftst(@_, "lstat") } |
2869 | sub pp_stat { ftst(@_, "stat") } | |
2870 | sub pp_ftrread { ftst(@_, "-R") } | |
6e90668e | 2871 | sub pp_ftrwrite { ftst(@_, "-W") } |
d989cdac SM |
2872 | sub pp_ftrexec { ftst(@_, "-X") } |
2873 | sub pp_fteread { ftst(@_, "-r") } | |
e31885a0 | 2874 | sub pp_ftewrite { ftst(@_, "-w") } |
d989cdac SM |
2875 | sub pp_fteexec { ftst(@_, "-x") } |
2876 | sub pp_ftis { ftst(@_, "-e") } | |
6e90668e SM |
2877 | sub pp_fteowned { ftst(@_, "-O") } |
2878 | sub pp_ftrowned { ftst(@_, "-o") } | |
d989cdac SM |
2879 | sub pp_ftzero { ftst(@_, "-z") } |
2880 | sub pp_ftsize { ftst(@_, "-s") } | |
2881 | sub pp_ftmtime { ftst(@_, "-M") } | |
2882 | sub pp_ftatime { ftst(@_, "-A") } | |
2883 | sub pp_ftctime { ftst(@_, "-C") } | |
2884 | sub pp_ftsock { ftst(@_, "-S") } | |
2885 | sub pp_ftchr { ftst(@_, "-c") } | |
2886 | sub pp_ftblk { ftst(@_, "-b") } | |
2887 | sub pp_ftfile { ftst(@_, "-f") } | |
2888 | sub pp_ftdir { ftst(@_, "-d") } | |
2889 | sub pp_ftpipe { ftst(@_, "-p") } | |
2890 | sub pp_ftlink { ftst(@_, "-l") } | |
2891 | sub pp_ftsuid { ftst(@_, "-u") } | |
2892 | sub pp_ftsgid { ftst(@_, "-g") } | |
2893 | sub pp_ftsvtx { ftst(@_, "-k") } | |
2894 | sub pp_fttty { ftst(@_, "-t") } | |
2895 | sub pp_fttext { ftst(@_, "-T") } | |
6e90668e SM |
2896 | sub pp_ftbinary { ftst(@_, "-B") } |
2897 | ||
a798dbf2 | 2898 | sub SWAP_CHILDREN () { 1 } |
6e90668e | 2899 | sub ASSIGN () { 2 } # has OP= variant |
7013e6ae | 2900 | sub LIST_CONTEXT () { 4 } # Assignment is in list context |
6e90668e | 2901 | |
9d2c6865 SM |
2902 | my(%left, %right); |
2903 | ||
2904 | sub assoc_class { | |
2905 | my $op = shift; | |
3f872cb9 GS |
2906 | my $name = $op->name; |
2907 | if ($name eq "concat" and $op->first->name eq "concat") { | |
e38ccfd9 | 2908 | # avoid spurious '=' -- see comment in pp_concat |
3f872cb9 | 2909 | return "concat"; |
9d2c6865 | 2910 | } |
3f872cb9 GS |
2911 | if ($name eq "null" and class($op) eq "UNOP" |
2912 | and $op->first->name =~ /^(and|x?or)$/ | |
9d2c6865 SM |
2913 | and null $op->first->sibling) |
2914 | { | |
2915 | # Like all conditional constructs, OP_ANDs and OP_ORs are topped | |
2916 | # with a null that's used as the common end point of the two | |
2917 | # flows of control. For precedence purposes, ignore it. | |
2918 | # (COND_EXPRs have these too, but we don't bother with | |
2919 | # their associativity). | |
2920 | return assoc_class($op->first); | |
2921 | } | |
2922 | return $name . ($op->flags & OPf_STACKED ? "=" : ""); | |
2923 | } | |
2924 | ||
e38ccfd9 | 2925 | # Left associative operators, like '+', for which |
9d2c6865 SM |
2926 | # $a + $b + $c is equivalent to ($a + $b) + $c |
2927 | ||
2928 | BEGIN { | |
3f872cb9 GS |
2929 | %left = ('multiply' => 19, 'i_multiply' => 19, |
2930 | 'divide' => 19, 'i_divide' => 19, | |
2931 | 'modulo' => 19, 'i_modulo' => 19, | |
2932 | 'repeat' => 19, | |
2933 | 'add' => 18, 'i_add' => 18, | |
2934 | 'subtract' => 18, 'i_subtract' => 18, | |
2935 | 'concat' => 18, | |
2936 | 'left_shift' => 17, 'right_shift' => 17, | |
27f31adf | 2937 | 'bit_and' => 13, 'nbit_and' => 13, 'sbit_and' => 13, |
3f872cb9 | 2938 | 'bit_or' => 12, 'bit_xor' => 12, |
27f31adf FC |
2939 | 'sbit_or' => 12, 'sbit_xor' => 12, |
2940 | 'nbit_or' => 12, 'nbit_xor' => 12, | |
3f872cb9 GS |
2941 | 'and' => 3, |
2942 | 'or' => 2, 'xor' => 2, | |
9d2c6865 SM |
2943 | ); |
2944 | } | |
2945 | ||
2946 | sub deparse_binop_left { | |
2947 | my $self = shift; | |
2948 | my($op, $left, $prec) = @_; | |
58231d39 | 2949 | if ($left{assoc_class($op)} && $left{assoc_class($left)} |
9d2c6865 SM |
2950 | and $left{assoc_class($op)} == $left{assoc_class($left)}) |
2951 | { | |
2952 | return $self->deparse($left, $prec - .00001); | |
2953 | } else { | |
2954 | return $self->deparse($left, $prec); | |
2955 | } | |
2956 | } | |
2957 | ||
e38ccfd9 | 2958 | # Right associative operators, like '=', for which |
9d2c6865 SM |
2959 | # $a = $b = $c is equivalent to $a = ($b = $c) |
2960 | ||
2961 | BEGIN { | |
3f872cb9 GS |
2962 | %right = ('pow' => 22, |
2963 | 'sassign=' => 7, 'aassign=' => 7, | |
2964 | 'multiply=' => 7, 'i_multiply=' => 7, | |
2965 | 'divide=' => 7, 'i_divide=' => 7, | |
2966 | 'modulo=' => 7, 'i_modulo=' => 7, | |
9187b6e4 | 2967 | 'repeat=' => 7, 'refassign' => 7, 'refassign=' => 7, |
3f872cb9 GS |
2968 | 'add=' => 7, 'i_add=' => 7, |
2969 | 'subtract=' => 7, 'i_subtract=' => 7, | |
2970 | 'concat=' => 7, | |
2971 | 'left_shift=' => 7, 'right_shift=' => 7, | |
27f31adf FC |
2972 | 'bit_and=' => 7, 'sbit_and=' => 7, 'nbit_and=' => 7, |
2973 | 'nbit_or=' => 7, 'nbit_xor=' => 7, | |
2974 | 'sbit_or=' => 7, 'sbit_xor=' => 7, | |
3f872cb9 GS |
2975 | 'andassign' => 7, |
2976 | 'orassign' => 7, | |
9d2c6865 SM |
2977 | ); |
2978 | } | |
2979 | ||
2980 | sub deparse_binop_right { | |
2981 | my $self = shift; | |
2982 | my($op, $right, $prec) = @_; | |
58231d39 | 2983 | if ($right{assoc_class($op)} && $right{assoc_class($right)} |
9d2c6865 SM |
2984 | and $right{assoc_class($op)} == $right{assoc_class($right)}) |
2985 | { | |
2986 | return $self->deparse($right, $prec - .00001); | |
2987 | } else { | |
2988 | return $self->deparse($right, $prec); | |
2989 | } | |
2990 | } | |
2991 | ||
a798dbf2 | 2992 | sub binop { |
6e90668e | 2993 | my $self = shift; |
9d2c6865 | 2994 | my ($op, $cx, $opname, $prec, $flags) = (@_, 0); |
a798dbf2 MB |
2995 | my $left = $op->first; |
2996 | my $right = $op->last; | |
9d2c6865 SM |
2997 | my $eq = ""; |
2998 | if ($op->flags & OPf_STACKED && $flags & ASSIGN) { | |
2999 | $eq = "="; | |
3000 | $prec = 7; | |
3001 | } | |
a798dbf2 MB |
3002 | if ($flags & SWAP_CHILDREN) { |
3003 | ($left, $right) = ($right, $left); | |
3004 | } | |
6a861075 | 3005 | my $leftop = $left; |
9d2c6865 | 3006 | $left = $self->deparse_binop_left($op, $left, $prec); |
90c0eb26 | 3007 | $left = "($left)" if $flags & LIST_CONTEXT |
c4874d8a | 3008 | and $left !~ /^(my|our|local|state|)\s*[\@%\(]/ |
6a861075 FC |
3009 | || do { |
3010 | # Parenthesize if the left argument is a | |
3011 | # lone repeat op. | |
3012 | my $left = $leftop->first->sibling; | |
3013 | $left->name eq 'repeat' | |
3014 | && null($left->sibling); | |
3015 | }; | |
9d2c6865 SM |
3016 | $right = $self->deparse_binop_right($op, $right, $prec); |
3017 | return $self->maybe_parens("$left $opname$eq $right", $cx, $prec); | |
3018 | } | |
3019 | ||
3ed82cfc GS |
3020 | sub pp_add { maybe_targmy(@_, \&binop, "+", 18, ASSIGN) } |
3021 | sub pp_multiply { maybe_targmy(@_, \&binop, "*", 19, ASSIGN) } | |
3022 | sub pp_subtract { maybe_targmy(@_, \&binop, "-",18, ASSIGN) } | |
3023 | sub pp_divide { maybe_targmy(@_, \&binop, "/", 19, ASSIGN) } | |
3024 | sub pp_modulo { maybe_targmy(@_, \&binop, "%", 19, ASSIGN) } | |
3025 | sub pp_i_add { maybe_targmy(@_, \&binop, "+", 18, ASSIGN) } | |
3026 | sub pp_i_multiply { maybe_targmy(@_, \&binop, "*", 19, ASSIGN) } | |
3027 | sub pp_i_subtract { maybe_targmy(@_, \&binop, "-", 18, ASSIGN) } | |
3028 | sub pp_i_divide { maybe_targmy(@_, \&binop, "/", 19, ASSIGN) } | |
3029 | sub pp_i_modulo { maybe_targmy(@_, \&binop, "%", 19, ASSIGN) } | |
3030 | sub pp_pow { maybe_targmy(@_, \&binop, "**", 22, ASSIGN) } | |
3031 | ||
3032 | sub pp_left_shift { maybe_targmy(@_, \&binop, "<<", 17, ASSIGN) } | |
3033 | sub pp_right_shift { maybe_targmy(@_, \&binop, ">>", 17, ASSIGN) } | |
3034 | sub pp_bit_and { maybe_targmy(@_, \&binop, "&", 13, ASSIGN) } | |
3035 | sub pp_bit_or { maybe_targmy(@_, \&binop, "|", 12, ASSIGN) } | |
3036 | sub pp_bit_xor { maybe_targmy(@_, \&binop, "^", 12, ASSIGN) } | |
27f31adf FC |
3037 | *pp_nbit_and = *pp_bit_and; |
3038 | *pp_nbit_or = *pp_bit_or; | |
3039 | *pp_nbit_xor = *pp_bit_xor; | |
3040 | sub pp_sbit_and { maybe_targmy(@_, \&binop, "&.", 13, ASSIGN) } | |
3041 | sub pp_sbit_or { maybe_targmy(@_, \&binop, "|.", 12, ASSIGN) } | |
3042 | sub pp_sbit_xor { maybe_targmy(@_, \&binop, "^.", 12, ASSIGN) } | |
9d2c6865 SM |
3043 | |
3044 | sub pp_eq { binop(@_, "==", 14) } | |
3045 | sub pp_ne { binop(@_, "!=", 14) } | |
3046 | sub pp_lt { binop(@_, "<", 15) } | |
3047 | sub pp_gt { binop(@_, ">", 15) } | |
3048 | sub pp_ge { binop(@_, ">=", 15) } | |
3049 | sub pp_le { binop(@_, "<=", 15) } | |
3050 | sub pp_ncmp { binop(@_, "<=>", 14) } | |
3051 | sub pp_i_eq { binop(@_, "==", 14) } | |
3052 | sub pp_i_ne { binop(@_, "!=", 14) } | |
3053 | sub pp_i_lt { binop(@_, "<", 15) } | |
3054 | sub pp_i_gt { binop(@_, ">", 15) } | |
3055 | sub pp_i_ge { binop(@_, ">=", 15) } | |
3056 | sub pp_i_le { binop(@_, "<=", 15) } | |
d1455c67 | 3057 | sub pp_i_ncmp { maybe_targmy(@_, \&binop, "<=>", 14) } |
9d2c6865 SM |
3058 | |
3059 | sub pp_seq { binop(@_, "eq", 14) } | |
3060 | sub pp_sne { binop(@_, "ne", 14) } | |
3061 | sub pp_slt { binop(@_, "lt", 15) } | |
3062 | sub pp_sgt { binop(@_, "gt", 15) } | |
3063 | sub pp_sge { binop(@_, "ge", 15) } | |
3064 | sub pp_sle { binop(@_, "le", 15) } | |
d1455c67 | 3065 | sub pp_scmp { maybe_targmy(@_, \&binop, "cmp", 14) } |
9d2c6865 | 3066 | |
813e85a0 PE |
3067 | sub pp_isa { binop(@_, "isa", 15) } |
3068 | ||
9d2c6865 | 3069 | sub pp_sassign { binop(@_, "=", 7, SWAP_CHILDREN) } |
7013e6ae | 3070 | sub pp_aassign { binop(@_, "=", 7, SWAP_CHILDREN | LIST_CONTEXT) } |
6e90668e | 3071 | |
7896dde7 Z |
3072 | sub pp_smartmatch { |
3073 | my ($self, $op, $cx) = @_; | |
3074 | if (($op->flags & OPf_SPECIAL) && $self->{expand} < 2) { | |
3075 | return $self->deparse($op->last, $cx); | |
3076 | } | |
3077 | else { | |
3078 | binop(@_, "~~", 14); | |
3079 | } | |
3080 | } | |
3081 | ||
e38ccfd9 | 3082 | # '.' is special because concats-of-concats are optimized to save copying |
6e90668e | 3083 | # by making all but the first concat stacked. The effect is as if the |
e38ccfd9 | 3084 | # programmer had written '($a . $b) .= $c', except legal. |
3ed82cfc GS |
3085 | sub pp_concat { maybe_targmy(@_, \&real_concat) } |
3086 | sub real_concat { | |
6e90668e | 3087 | my $self = shift; |
9d2c6865 | 3088 | my($op, $cx) = @_; |
6e90668e SM |
3089 | my $left = $op->first; |
3090 | my $right = $op->last; | |
3091 | my $eq = ""; | |
9d2c6865 | 3092 | my $prec = 18; |
4b75096e DM |
3093 | if (($op->flags & OPf_STACKED) and !($op->private & OPpCONCAT_NESTED)) { |
3094 | # '.=' rather than optimised '.' | |
6e90668e | 3095 | $eq = "="; |
9d2c6865 | 3096 | $prec = 7; |
6e90668e | 3097 | } |
9d2c6865 SM |
3098 | $left = $self->deparse_binop_left($op, $left, $prec); |
3099 | $right = $self->deparse_binop_right($op, $right, $prec); | |
3100 | return $self->maybe_parens("$left .$eq $right", $cx, $prec); | |
6e90668e SM |
3101 | } |
3102 | ||
6402d4ee FC |
3103 | sub pp_repeat { maybe_targmy(@_, \&repeat) } |
3104 | ||
e38ccfd9 | 3105 | # 'x' is weird when the left arg is a list |
6402d4ee | 3106 | sub repeat { |
6e90668e | 3107 | my $self = shift; |
9d2c6865 | 3108 | my($op, $cx) = @_; |
6e90668e SM |
3109 | my $left = $op->first; |
3110 | my $right = $op->last; | |
9d2c6865 SM |
3111 | my $eq = ""; |
3112 | my $prec = 19; | |
3113 | if ($op->flags & OPf_STACKED) { | |
3114 | $eq = "="; | |
3115 | $prec = 7; | |
3116 | } | |
6e90668e | 3117 | if (null($right)) { # list repeat; count is inside left-side ex-list |
5e462669 | 3118 | # in 5.21.5 and earlier |
6e90668e SM |
3119 | my $kid = $left->first->sibling; # skip pushmark |
3120 | my @exprs; | |
3121 | for (; !null($kid->sibling); $kid = $kid->sibling) { | |
9d2c6865 | 3122 | push @exprs, $self->deparse($kid, 6); |
6e90668e SM |
3123 | } |
3124 | $right = $kid; | |
3125 | $left = "(" . join(", ", @exprs). ")"; | |
3126 | } else { | |
5e462669 FC |
3127 | my $dolist = $op->private & OPpREPEAT_DOLIST; |
3128 | $left = $self->deparse_binop_left($op, $left, $dolist ? 1 : $prec); | |
3129 | if ($dolist) { | |
3130 | $left = "($left)"; | |
3131 | } | |
6e90668e | 3132 | } |
9d2c6865 SM |
3133 | $right = $self->deparse_binop_right($op, $right, $prec); |
3134 | return $self->maybe_parens("$left x$eq $right", $cx, $prec); | |
6e90668e SM |
3135 | } |
3136 | ||
3137 | sub range { | |
3138 | my $self = shift; | |
9d2c6865 | 3139 | my ($op, $cx, $type) = @_; |
6e90668e SM |
3140 | my $left = $op->first; |
3141 | my $right = $left->sibling; | |
9d2c6865 SM |
3142 | $left = $self->deparse($left, 9); |
3143 | $right = $self->deparse($right, 9); | |
3144 | return $self->maybe_parens("$left $type $right", $cx, 9); | |
6e90668e SM |
3145 | } |
3146 | ||
3147 | sub pp_flop { | |
3148 | my $self = shift; | |
9d2c6865 | 3149 | my($op, $cx) = @_; |
6e90668e SM |
3150 | my $flip = $op->first; |
3151 | my $type = ($flip->flags & OPf_SPECIAL) ? "..." : ".."; | |
9d2c6865 | 3152 | return $self->range($flip->first, $cx, $type); |
6e90668e SM |
3153 | } |
3154 | ||
3155 | # one-line while/until is handled in pp_leave | |
3156 | ||
3157 | sub logop { | |
3158 | my $self = shift; | |
9d2c6865 | 3159 | my ($op, $cx, $lowop, $lowprec, $highop, $highprec, $blockname) = @_; |
6e90668e SM |
3160 | my $left = $op->first; |
3161 | my $right = $op->first->sibling; | |
7741ceed | 3162 | $blockname &&= $self->keyword($blockname); |
d989cdac | 3163 | if ($cx < 1 and is_scope($right) and $blockname |
58cccf98 SM |
3164 | and $self->{'expand'} < 7) |
3165 | { # if ($a) {$b} | |
9d2c6865 SM |
3166 | $left = $self->deparse($left, 1); |
3167 | $right = $self->deparse($right, 0); | |
3168 | return "$blockname ($left) {\n\t$right\n\b}\cK"; | |
d989cdac | 3169 | } elsif ($cx < 1 and $blockname and not $self->{'parens'} |
58cccf98 | 3170 | and $self->{'expand'} < 7) { # $b if $a |
9d2c6865 SM |
3171 | $right = $self->deparse($right, 1); |
3172 | $left = $self->deparse($left, 1); | |
3173 | return "$right $blockname $left"; | |
3174 | } elsif ($cx > $lowprec and $highop) { # $a && $b | |
3175 | $left = $self->deparse_binop_left($op, $left, $highprec); | |
3176 | $right = $self->deparse_binop_right($op, $right, $highprec); | |
3177 | return $self->maybe_parens("$left $highop $right", $cx, $highprec); | |
3178 | } else { # $a and $b | |
3179 | $left = $self->deparse_binop_left($op, $left, $lowprec); | |
3180 | $right = $self->deparse_binop_right($op, $right, $lowprec); | |
d989cdac | 3181 | return $self->maybe_parens("$left $lowop $right", $cx, $lowprec); |
9d2c6865 SM |
3182 | } |
3183 | } | |
3184 | ||
3185 | sub pp_and { logop(@_, "and", 3, "&&", 11, "if") } | |
f4a44678 | 3186 | sub pp_or { logop(@_, "or", 2, "||", 10, "unless") } |
5b99f273 | 3187 | sub pp_dor { logop(@_, "//", 10) } |
3ed82cfc GS |
3188 | |
3189 | # xor is syntactically a logop, but it's really a binop (contrary to | |
3190 | # old versions of opcode.pl). Syntax is what matters here. | |
9d2c6865 | 3191 | sub pp_xor { logop(@_, "xor", 2, "", 0, "") } |
6e90668e SM |
3192 | |
3193 | sub logassignop { | |
3194 | my $self = shift; | |
9d2c6865 | 3195 | my ($op, $cx, $opname) = @_; |
6e90668e SM |
3196 | my $left = $op->first; |
3197 | my $right = $op->first->sibling->first; # skip sassign | |
9d2c6865 SM |
3198 | $left = $self->deparse($left, 7); |
3199 | $right = $self->deparse($right, 7); | |
3200 | return $self->maybe_parens("$left $opname $right", $cx, 7); | |
a798dbf2 MB |
3201 | } |
3202 | ||
6e90668e | 3203 | sub pp_andassign { logassignop(@_, "&&=") } |
c963b151 BD |
3204 | sub pp_orassign { logassignop(@_, "||=") } |
3205 | sub pp_dorassign { logassignop(@_, "//=") } | |
6e90668e | 3206 | |
02b85d3d Z |
3207 | my %cmpchain_cmpops = ( |
3208 | eq => ["==", 14], | |
3209 | i_eq => ["==", 14], | |
3210 | ne => ["!=", 14], | |
3211 | i_ne => ["!=", 14], | |
3212 | seq => ["eq", 14], | |
3213 | sne => ["ne", 14], | |
3214 | lt => ["<", 15], | |
3215 | i_lt => ["<", 15], | |
3216 | gt => [">", 15], | |
3217 | i_gt => [">", 15], | |
3218 | le => ["<=", 15], | |
3219 | i_le => ["<=", 15], | |
3220 | ge => [">=", 15], | |
3221 | i_ge => [">=", 15], | |
3222 | slt => ["lt", 15], | |
3223 | sgt => ["gt", 15], | |
3224 | sle => ["le", 15], | |
3225 | sge => ["ge", 15], | |
3226 | ); | |
3227 | sub pp_cmpchain_and { | |
3228 | my($self, $op, $cx) = @_; | |
3229 | my($prec, $dep); | |
3230 | while(1) { | |
3231 | my($thiscmp, $rightcond); | |
3232 | if($op->name eq "cmpchain_and") { | |
3233 | $thiscmp = $op->first; | |
3234 | $rightcond = $thiscmp->sibling; | |
3235 | } else { | |
3236 | $thiscmp = $op; | |
3237 | } | |
3238 | my $thiscmptype = $cmpchain_cmpops{$thiscmp->name} // (return "XXX"); | |
3239 | if(defined $prec) { | |
3240 | $thiscmptype->[1] == $prec or return "XXX"; | |
3241 | $thiscmp->first->name eq "null" && | |
3242 | !($thiscmp->first->flags & OPf_KIDS) | |
3243 | or return "XXX"; | |
3244 | } else { | |
3245 | $prec = $thiscmptype->[1]; | |
3246 | $dep = $self->deparse($thiscmp->first, $prec); | |
3247 | } | |
3248 | $dep .= " ".$thiscmptype->[0]." "; | |
3249 | my $operand = $thiscmp->last; | |
3250 | if(defined $rightcond) { | |
3251 | $operand->name eq "cmpchain_dup" or return "XXX"; | |
3252 | $operand = $operand->first; | |
3253 | } | |
3254 | $dep .= $self->deparse($operand, $prec); | |
3255 | last unless defined $rightcond; | |
3256 | if($rightcond->name eq "null" && ($rightcond->flags & OPf_KIDS) && | |
3257 | $rightcond->first->name eq "cmpchain_and") { | |
3258 | $rightcond = $rightcond->first; | |
3259 | } | |
3260 | $op = $rightcond; | |
3261 | } | |
3262 | return $self->maybe_parens($dep, $cx, $prec); | |
3263 | } | |
3264 | ||
b89b7257 FC |
3265 | sub rv2gv_or_string { |
3266 | my($self,$op) = @_; | |
3267 | if ($op->name eq "gv") { # could be open("open") or open("###") | |
be6cf5cf | 3268 | my($name,$quoted) = |
1db94eeb | 3269 | $self->stash_variable_name("", $self->gv_or_padgv($op)); |
be6cf5cf | 3270 | $quoted ? $name : "*$name"; |
b89b7257 FC |
3271 | } |
3272 | else { | |
3273 | $self->deparse($op, 6); | |
3274 | } | |
3275 | } | |
3276 | ||
6e90668e SM |
3277 | sub listop { |
3278 | my $self = shift; | |
9c56d9ea | 3279 | my($op, $cx, $name, $kid, $nollafr) = @_; |
9d2c6865 SM |
3280 | my(@exprs); |
3281 | my $parens = ($cx >= 5) || $self->{'parens'}; | |
24fcb59f | 3282 | $kid ||= $op->first->sibling; |
4d8ac5c7 FC |
3283 | # If there are no arguments, add final parentheses (or parenthesize the |
3284 | # whole thing if the llafr does not apply) to account for cases like | |
3285 | # (return)+1 or setpgrp()+1. When the llafr does not apply, we use a | |
3286 | # precedence of 6 (< comma), as "return, 1" does not need parentheses. | |
3287 | if (null $kid) { | |
3288 | return $nollafr | |
3289 | ? $self->maybe_parens($self->keyword($name), $cx, 7) | |
3290 | : $self->keyword($name) . '()' x (7 < $cx); | |
3291 | } | |
e31885a0 | 3292 | my $first; |
4a1ac32e | 3293 | my $fullname = $self->keyword($name); |
b72c97e8 | 3294 | my $proto = prototype("CORE::$name"); |
bc1cc2c3 DM |
3295 | if ( |
3296 | ( (defined $proto && $proto =~ /^;?\*/) | |
3297 | || $name eq 'select' # select(F) doesn't have a proto | |
3298 | ) | |
3299 | && $kid->name eq "rv2gv" | |
3300 | && !($kid->private & OPpLVAL_INTRO) | |
3301 | ) { | |
b89b7257 | 3302 | $first = $self->rv2gv_or_string($kid->first); |
e31885a0 RH |
3303 | } |
3304 | else { | |
3305 | $first = $self->deparse($kid, 6); | |
3306 | } | |
e99ebc55 | 3307 | if ($name eq "chmod" && $first =~ /^\d+$/) { |
a0035eb8 | 3308 | $first = sprintf("%#o", $first); |
e99ebc55 | 3309 | } |
9c56d9ea FC |
3310 | $first = "+$first" |
3311 | if not $parens and not $nollafr and substr($first, 0, 1) eq "("; | |
9d2c6865 SM |
3312 | push @exprs, $first; |
3313 | $kid = $kid->sibling; | |
564cd6cb FC |
3314 | if (defined $proto && $proto =~ /^\*\*/ && $kid->name eq "rv2gv" |
3315 | && !($kid->private & OPpLVAL_INTRO)) { | |
b89b7257 | 3316 | push @exprs, $first = $self->rv2gv_or_string($kid->first); |
b72c97e8 RGS |
3317 | $kid = $kid->sibling; |
3318 | } | |
9d2c6865 SM |
3319 | for (; !null($kid); $kid = $kid->sibling) { |
3320 | push @exprs, $self->deparse($kid, 6); | |
3321 | } | |
689e417f | 3322 | if ($name eq "reverse" && ($op->private & OPpREVERSE_INPLACE)) { |
4a1ac32e FC |
3323 | return "$exprs[0] = $fullname" |
3324 | . ($parens ? "($exprs[0])" : " $exprs[0]"); | |
689e417f | 3325 | } |
327088eb | 3326 | |
9c56d9ea FC |
3327 | if ($parens && $nollafr) { |
3328 | return "($fullname " . join(", ", @exprs) . ")"; | |
3329 | } elsif ($parens) { | |
4a1ac32e | 3330 | return "$fullname(" . join(", ", @exprs) . ")"; |
9d2c6865 | 3331 | } else { |
4a1ac32e | 3332 | return "$fullname " . join(", ", @exprs); |
6e90668e | 3333 | } |
6e90668e | 3334 | } |
a798dbf2 | 3335 | |
6e90668e | 3336 | sub pp_bless { listop(@_, "bless") } |
3ed82cfc | 3337 | sub pp_atan2 { maybe_targmy(@_, \&listop, "atan2") } |
24fcb59f FC |
3338 | sub pp_substr { |
3339 | my ($self,$op,$cx) = @_; | |
3340 | if ($op->private & OPpSUBSTR_REPL_FIRST) { | |
3341 | return | |
3342 | listop($self, $op, 7, "substr", $op->first->sibling->sibling) | |
3343 | . " = " | |
3344 | . $self->deparse($op->first->sibling, 7); | |
3345 | } | |
3346 | maybe_local(@_, listop(@_, "substr")) | |
3347 | } | |
7e8d786b DM |
3348 | |
3349 | sub pp_index { | |
3350 | # Also handles pp_rindex. | |
3351 | # | |
3352 | # The body of this function includes an unrolled maybe_targmy(), | |
3353 | # since the two parts of that sub's actions need to have have the | |
3354 | # '== -1' bit in between | |
3355 | ||
3356 | my($self, $op, $cx) = @_; | |
3357 | ||
3358 | my $lex = ($op->private & OPpTARGET_MY); | |
3359 | my $bool = ($op->private & OPpTRUEBOOL); | |
3360 | ||
3361 | my $val = $self->listop($op, ($bool ? 14 : $lex ? 7 : $cx), $op->name); | |
3362 | ||
3363 | # (index() == -1) has op_eq and op_const optimised away | |
3364 | if ($bool) { | |
3365 | $val .= ($op->private & OPpINDEX_BOOLNEG) ? " == -1" : " != -1"; | |
3366 | $val = "($val)" if ($op->flags & OPf_PARENS); | |
3367 | } | |
3368 | if ($lex) { | |
3369 | my $var = $self->padname($op->targ); | |
3370 | $val = $self->maybe_parens("$var = $val", $cx, 7); | |
3371 | } | |
3372 | $val; | |
3373 | } | |
3374 | ||
3375 | sub pp_rindex { pp_index(@_); } | |
6402d4ee | 3376 | sub pp_vec { maybe_targmy(@_, \&maybe_local, listop(@_, "vec")) } |
3ed82cfc | 3377 | sub pp_sprintf { maybe_targmy(@_, \&listop, "sprintf") } |
6e90668e | 3378 | sub pp_formline { listop(@_, "formline") } # see also deparse_format |
3ed82cfc | 3379 | sub pp_crypt { maybe_targmy(@_, \&listop, "crypt") } |
6e90668e SM |
3380 | sub pp_unpack { listop(@_, "unpack") } |
3381 | sub pp_pack { listop(@_, "pack") } | |
3ed82cfc | 3382 | sub pp_join { maybe_targmy(@_, \&listop, "join") } |
6e90668e | 3383 | sub pp_splice { listop(@_, "splice") } |
3ed82cfc GS |
3384 | sub pp_push { maybe_targmy(@_, \&listop, "push") } |
3385 | sub pp_unshift { maybe_targmy(@_, \&listop, "unshift") } | |
6e90668e SM |
3386 | sub pp_reverse { listop(@_, "reverse") } |
3387 | sub pp_warn { listop(@_, "warn") } | |
3388 | sub pp_die { listop(@_, "die") } | |
9c56d9ea | 3389 | sub pp_return { listop(@_, "return", undef, 1) } # llafr does not apply |
6e90668e SM |
3390 | sub pp_open { listop(@_, "open") } |
3391 | sub pp_pipe_op { listop(@_, "pipe") } | |
3392 | sub pp_tie { listop(@_, "tie") } | |
82bafd27 | 3393 | sub pp_binmode { listop(@_, "binmode") } |
6e90668e SM |
3394 | sub pp_dbmopen { listop(@_, "dbmopen") } |
3395 | sub pp_sselect { listop(@_, "select") } | |
3396 | sub pp_select { listop(@_, "select") } | |
3397 | sub pp_read { listop(@_, "read") } | |
3398 | sub pp_sysopen { listop(@_, "sysopen") } | |
3399 | sub pp_sysseek { listop(@_, "sysseek") } | |
3400 | sub pp_sysread { listop(@_, "sysread") } | |
3401 | sub pp_syswrite { listop(@_, "syswrite") } | |
3402 | sub pp_send { listop(@_, "send") } | |
3403 | sub pp_recv { listop(@_, "recv") } | |
3404 | sub pp_seek { listop(@_, "seek") } | |
6e90668e SM |
3405 | sub pp_fcntl { listop(@_, "fcntl") } |
3406 | sub pp_ioctl { listop(@_, "ioctl") } | |
3ed82cfc | 3407 | sub pp_flock { maybe_targmy(@_, \&listop, "flock") } |
6e90668e | 3408 | sub pp_socket { listop(@_, "socket") } |
5deb1341 | 3409 | sub pp_sockpair { listop(@_, "socketpair") } |
6e90668e SM |
3410 | sub pp_bind { listop(@_, "bind") } |
3411 | sub pp_connect { listop(@_, "connect") } | |
3412 | sub pp_listen { listop(@_, "listen") } | |
3413 | sub pp_accept { listop(@_, "accept") } | |
3414 | sub pp_shutdown { listop(@_, "shutdown") } | |
3415 | sub pp_gsockopt { listop(@_, "getsockopt") } | |
3416 | sub pp_ssockopt { listop(@_, "setsockopt") } | |
3ed82cfc GS |
3417 | sub pp_chown { maybe_targmy(@_, \&listop, "chown") } |
3418 | sub pp_unlink { maybe_targmy(@_, \&listop, "unlink") } | |
3419 | sub pp_chmod { maybe_targmy(@_, \&listop, "chmod") } | |
3420 | sub pp_utime { maybe_targmy(@_, \&listop, "utime") } | |
3421 | sub pp_rename { maybe_targmy(@_, \&listop, "rename") } | |
3422 | sub pp_link { maybe_targmy(@_, \&listop, "link") } | |
3423 | sub pp_symlink { maybe_targmy(@_, \&listop, "symlink") } | |
3424 | sub pp_mkdir { maybe_targmy(@_, \&listop, "mkdir") } | |
6e90668e SM |
3425 | sub pp_open_dir { listop(@_, "opendir") } |
3426 | sub pp_seekdir { listop(@_, "seekdir") } | |
3ed82cfc | 3427 | sub pp_waitpid { maybe_targmy(@_, \&listop, "waitpid") } |
9d52f6f3 FC |
3428 | sub pp_system { maybe_targmy(@_, \&indirop, "system") } |
3429 | sub pp_exec { maybe_targmy(@_, \&indirop, "exec") } | |
3ed82cfc GS |
3430 | sub pp_kill { maybe_targmy(@_, \&listop, "kill") } |
3431 | sub pp_setpgrp { maybe_targmy(@_, \&listop, "setpgrp") } | |
3432 | sub pp_getpriority { maybe_targmy(@_, \&listop, "getpriority") } | |
3433 | sub pp_setpriority { maybe_targmy(@_, \&listop, "setpriority") } | |
6e90668e SM |
3434 | sub pp_shmget { listop(@_, "shmget") } |
3435 | sub pp_shmctl { listop(@_, "shmctl") } | |
3436 | sub pp_shmread { listop(@_, "shmread") } | |
3437 | sub pp_shmwrite { listop(@_, "shmwrite") } | |
3438 | sub pp_msgget { listop(@_, "msgget") } | |
3439 | sub pp_msgctl { listop(@_, "msgctl") } | |
3440 | sub pp_msgsnd { listop(@_, "msgsnd") } | |
3441 | sub pp_msgrcv { listop(@_, "msgrcv") } | |
3442 | sub pp_semget { listop(@_, "semget") } | |
3443 | sub pp_semctl { listop(@_, "semctl") } | |
3444 | sub pp_semop { listop(@_, "semop") } | |
3445 | sub pp_ghbyaddr { listop(@_, "gethostbyaddr") } | |
3446 | sub pp_gnbyaddr { listop(@_, "getnetbyaddr") } | |
3447 | sub pp_gpbynumber { listop(@_, "getprotobynumber") } | |
3448 | sub pp_gsbyname { listop(@_, "getservbyname") } | |
3449 | sub pp_gsbyport { listop(@_, "getservbyport") } | |
3450 | sub pp_syscall { listop(@_, "syscall") } | |
3451 | ||
3452 | sub pp_glob { | |
3453 | my $self = shift; | |
9d2c6865 | 3454 | my($op, $cx) = @_; |
93860275 | 3455 | my $kid = $op->first->sibling; # skip pushmark |
a32fbbd8 FC |
3456 | my $keyword = |
3457 | $op->flags & OPf_SPECIAL ? 'glob' : $self->keyword('glob'); | |
fbe6adf2 | 3458 | my $text = $self->deparse($kid, $cx); |
18371617 LM |
3459 | return $cx >= 5 || $self->{'parens'} |
3460 | ? "$keyword($text)" | |
3461 | : "$keyword $text"; | |
6e90668e SM |
3462 | } |
3463 | ||
f5aa8f4e SM |
3464 | # Truncate is special because OPf_SPECIAL makes a bareword first arg |
3465 | # be a filehandle. This could probably be better fixed in the core | |
3466 | # by moving the GV lookup into ck_truc. | |
3467 | ||
3468 | sub pp_truncate { | |
3469 | my $self = shift; | |
3470 | my($op, $cx) = @_; | |
3471 | my(@exprs); | |
3472 | my $parens = ($cx >= 5) || $self->{'parens'}; | |
3473 | my $kid = $op->first->sibling; | |
acba1d67 | 3474 | my $fh; |
f5aa8f4e SM |
3475 | if ($op->flags & OPf_SPECIAL) { |
3476 | # $kid is an OP_CONST | |
18228111 | 3477 | $fh = $self->const_sv($kid)->PV; |
f5aa8f4e SM |
3478 | } else { |
3479 | $fh = $self->deparse($kid, 6); | |
3480 | $fh = "+$fh" if not $parens and substr($fh, 0, 1) eq "("; | |
3481 | } | |
3482 | my $len = $self->deparse($kid->sibling, 6); | |
4a1ac32e | 3483 | my $name = $self->keyword('truncate'); |
f5aa8f4e | 3484 | if ($parens) { |
4a1ac32e | 3485 | return "$name($fh, $len)"; |
f5aa8f4e | 3486 | } else { |
4a1ac32e | 3487 | return "$name $fh, $len"; |
f5aa8f4e | 3488 | } |
f5aa8f4e SM |
3489 | } |
3490 | ||
6e90668e SM |
3491 | sub indirop { |
3492 | my $self = shift; | |
9d2c6865 | 3493 | my($op, $cx, $name) = @_; |
6e90668e | 3494 | my($expr, @exprs); |
521795fe | 3495 | my $firstkid = my $kid = $op->first->sibling; |
6e90668e SM |
3496 | my $indir = ""; |
3497 | if ($op->flags & OPf_STACKED) { | |
3498 | $indir = $kid; | |
3499 | $indir = $indir->first; # skip rv2gv | |
3500 | if (is_scope($indir)) { | |
9d2c6865 | 3501 | $indir = "{" . $self->deparse($indir, 0) . "}"; |
d989cdac | 3502 | $indir = "{;}" if $indir eq "{}"; |
c73811ab RH |
3503 | } elsif ($indir->name eq "const" && $indir->private & OPpCONST_BARE) { |
3504 | $indir = $self->const_sv($indir)->PV; | |
6e90668e | 3505 | } else { |
9d2c6865 | 3506 | $indir = $self->deparse($indir, 24); |
6e90668e SM |
3507 | } |
3508 | $indir = $indir . " "; | |
3509 | $kid = $kid->sibling; | |
3510 | } | |
7e80da18 | 3511 | if ($name eq "sort" && $op->private & (OPpSORT_NUMERIC | OPpSORT_INTEGER)) { |
3ac6e0f9 | 3512 | $indir = ($op->private & OPpSORT_DESCEND) ? '{$b <=> $a} ' |
7e80da18 RH |
3513 | : '{$a <=> $b} '; |
3514 | } | |
3ac6e0f9 | 3515 | elsif ($name eq "sort" && $op->private & OPpSORT_DESCEND) { |
7e80da18 RH |
3516 | $indir = '{$b cmp $a} '; |
3517 | } | |
6e90668e | 3518 | for (; !null($kid); $kid = $kid->sibling) { |
521795fe | 3519 | $expr = $self->deparse($kid, !$indir && $kid == $firstkid && $name eq "sort" && $firstkid->name eq "entersub" ? 16 : 6); |
6e90668e SM |
3520 | push @exprs, $expr; |
3521 | } | |
4a1ac32e | 3522 | my $name2; |
3ac6e0f9 | 3523 | if ($name eq "sort" && $op->private & OPpSORT_REVERSE) { |
4a1ac32e | 3524 | $name2 = $self->keyword('reverse') . ' ' . $self->keyword('sort'); |
3ac6e0f9 | 3525 | } |
4a1ac32e | 3526 | else { $name2 = $self->keyword($name) } |
2b6e98cb | 3527 | if ($name eq "sort" && ($op->private & OPpSORT_INPLACE)) { |
3ac6e0f9 | 3528 | return "$exprs[0] = $name2 $indir $exprs[0]"; |
2b6e98cb DM |
3529 | } |
3530 | ||
d989cdac | 3531 | my $args = $indir . join(", ", @exprs); |
521795fe | 3532 | if ($indir ne "" && $name eq "sort") { |
d989cdac SM |
3533 | # We don't want to say "sort(f 1, 2, 3)", since perl -w will |
3534 | # give bareword warnings in that case. Therefore if context | |
3535 | # requires, we'll put parens around the outside "(sort f 1, 2, | |
3536 | # 3)". Unfortunately, we'll currently think the parens are | |
3c4b39be | 3537 | # necessary more often that they really are, because we don't |
d989cdac SM |
3538 | # distinguish which side of an assignment we're on. |
3539 | if ($cx >= 5) { | |
3ac6e0f9 | 3540 | return "($name2 $args)"; |
d989cdac | 3541 | } else { |
3ac6e0f9 | 3542 | return "$name2 $args"; |
d989cdac | 3543 | } |
521795fe FC |
3544 | } elsif ( |
3545 | !$indir && $name eq "sort" | |
ca331985 | 3546 | && !null($op->first->sibling) |
521795fe FC |
3547 | && $op->first->sibling->name eq 'entersub' |
3548 | ) { | |
3549 | # We cannot say sort foo(bar), as foo will be interpreted as a | |
3550 | # comparison routine. We have to say sort(...) in that case. | |
3551 | return "$name2($args)"; | |
d989cdac | 3552 | } else { |
9d52f6f3 FC |
3553 | return length $args |
3554 | ? $self->maybe_parens_func($name2, $args, $cx, 5) | |
3555 | : $name2 . '()' x (7 < $cx); | |
d989cdac SM |
3556 | } |
3557 | ||
6e90668e SM |
3558 | } |
3559 | ||
3560 | sub pp_prtf { indirop(@_, "printf") } | |
3561 | sub pp_print { indirop(@_, "print") } | |
9b08e3d3 | 3562 | sub pp_say { indirop(@_, "say") } |
6e90668e SM |
3563 | sub pp_sort { indirop(@_, "sort") } |
3564 | ||
3565 | sub mapop { | |
3566 | my $self = shift; | |
9d2c6865 | 3567 | my($op, $cx, $name) = @_; |
6e90668e SM |
3568 | my($expr, @exprs); |
3569 | my $kid = $op->first; # this is the (map|grep)start | |
3570 | $kid = $kid->first->sibling; # skip a pushmark | |
3571 | my $code = $kid->first; # skip a null | |
3572 | if (is_scope $code) { | |
f4a44678 | 3573 | $code = "{" . $self->deparse($code, 0) . "} "; |
6e90668e | 3574 | } else { |
6d08f7b3 DM |
3575 | $code = $self->deparse($code, 24); |
3576 | $code .= ", " if !null($kid->sibling); | |
6e90668e SM |
3577 | } |
3578 | $kid = $kid->sibling; | |
3579 | for (; !null($kid); $kid = $kid->sibling) { | |
9d2c6865 | 3580 | $expr = $self->deparse($kid, 6); |
9a58b761 | 3581 | push @exprs, $expr if defined $expr; |
6e90668e | 3582 | } |
3188a821 FC |
3583 | return $self->maybe_parens_func($self->keyword($name), |
3584 | $code . join(", ", @exprs), $cx, 5); | |
6e90668e SM |
3585 | } |
3586 | ||
d989cdac SM |
3587 | sub pp_mapwhile { mapop(@_, "map") } |
3588 | sub pp_grepwhile { mapop(@_, "grep") } | |
11e09183 SP |
3589 | sub pp_mapstart { baseop(@_, "map") } |
3590 | sub pp_grepstart { baseop(@_, "grep") } | |
6e90668e | 3591 | |
12cea2fa FC |
3592 | my %uses_intro; |
3593 | BEGIN { | |
3594 | @uses_intro{ | |
3595 | eval { require B::Op_private } | |
e58dedd3 | 3596 | ? @{$B::Op_private::ops_using{OPpLVAL_INTRO}} |
12cea2fa FC |
3597 | : qw(gvsv rv2sv rv2hv rv2gv rv2av aelem helem aslice |
3598 | hslice delete padsv padav padhv enteriter entersub padrange | |
3599 | pushmark cond_expr refassign list) | |
3600 | } = (); | |
bba4f5ff | 3601 | delete @uses_intro{qw( lvref lvrefslice lvavref entersub )}; |
12cea2fa FC |
3602 | } |
3603 | ||
82ab48fa | 3604 | |
4a4aa6e0 DM |
3605 | # Look for a my/state attribute declaration in a list or ex-list. |
3606 | # Returns undef if not found, 'my($x, @a) :Foo(bar)' etc otherwise. | |
82ab48fa DM |
3607 | # |
3608 | # There are three basic tree structs that are expected: | |
3609 | # | |
3610 | # my $x :foo; | |
3611 | # <1> ex-list vK/LVINTRO ->c | |
3612 | # <0> ex-pushmark v ->3 | |
3613 | # <1> entersub[t2] vKRS*/TARG ->b | |
3614 | # .... | |
3615 | # <0> padsv[$x:64,65] vM/LVINTRO ->c | |
3616 | # | |
3617 | # my @a :foo; | |
3618 | # my %h :foo; | |
3619 | # | |
3620 | # <1> ex-list vK ->c | |
3621 | # <0> ex-pushmark v ->3 | |
3622 | # <0> padav[@a:64,65] vM/LVINTRO ->4 | |
3623 | # <1> entersub[t2] vKRS*/TARG ->c | |
3624 | # .... | |
3625 | # | |
3626 | # my ($x,@a,%h) :foo; | |
3627 | # | |
3628 | # <;> nextstate(main 64 -e:1) v:{ ->3 | |
3629 | # <@> list vKP ->w | |
3630 | # <0> pushmark vM/LVINTRO ->4 | |
3631 | # <0> padsv[$x:64,65] vM/LVINTRO ->5 | |
3632 | # <0> padav[@a:64,65] vM/LVINTRO ->6 | |
3633 | # <0> padhv[%h:64,65] vM/LVINTRO ->7 | |
3634 | # <1> entersub[t4] vKRS*/TARG ->f | |
3635 | # .... | |
3636 | # <1> entersub[t5] vKRS*/TARG ->n | |
3637 | # .... | |
3638 | # <1> entersub[t6] vKRS*/TARG ->v | |
3639 | # .... | |
3640 | # where the entersub in all cases looks like | |
3641 | # <1> entersub[t2] vKRS*/TARG ->c | |
3642 | # <0> pushmark s ->5 | |
3643 | # <$> const[PV "attributes"] sM ->6 | |
3644 | # <$> const[PV "main"] sM ->7 | |
3645 | # <1> srefgen sKM/1 ->9 | |
3646 | # <1> ex-list lKRM ->8 | |
3647 | # <0> padsv[@a:64,65] sRM ->8 | |
3648 | # <$> const[PV "foo"] sM ->a | |
3649 | # <.> method_named[PV "import"] ->b | |
3650 | ||
4a4aa6e0 | 3651 | sub maybe_var_attr { |
82ab48fa DM |
3652 | my ($self, $op, $cx) = @_; |
3653 | ||
3654 | my $kid = $op->first->sibling; # skip pushmark | |
3655 | return if class($kid) eq 'NULL'; | |
3656 | ||
3657 | my $lop; | |
3658 | my $type; | |
3659 | ||
3660 | # Extract out all the pad ops and entersub ops into | |
3661 | # @padops and @entersubops. Return if anything else seen. | |
3662 | # Also determine what class (if any) all the pad vars belong to | |
3663 | my $class; | |
4a4aa6e0 | 3664 | my $decl; # 'my' or 'state' |
82ab48fa DM |
3665 | my (@padops, @entersubops); |
3666 | for ($lop = $kid; !null($lop); $lop = $lop->sibling) { | |
3667 | my $lopname = $lop->name; | |
3668 | my $loppriv = $lop->private; | |
3669 | if ($lopname =~ /^pad[sah]v$/) { | |
3670 | return unless $loppriv & OPpLVAL_INTRO; | |
82ab48fa DM |
3671 | |
3672 | my $padname = $self->padname_sv($lop->targ); | |
3673 | my $thisclass = ($padname->FLAGS & SVpad_TYPED) | |
3674 | ? $padname->SvSTASH->NAME : 'main'; | |
3675 | ||
3676 | # all pad vars must be in the same class | |
3677 | $class //= $thisclass; | |
3678 | return unless $thisclass eq $class; | |
3679 | ||
4a4aa6e0 DM |
3680 | # all pad vars must be the same sort of declaration |
3681 | # (all my, all state, etc) | |
3682 | my $this = ($loppriv & OPpPAD_STATE) ? 'state' : 'my'; | |
3683 | if (defined $decl) { | |
3684 | return unless $this eq $decl; | |
3685 | } | |
3686 | $decl = $this; | |
3687 | ||
82ab48fa DM |
3688 | push @padops, $lop; |
3689 | } | |
3690 | elsif ($lopname eq 'entersub') { | |
3691 | push @entersubops, $lop; | |
3692 | } | |
3693 | else { | |
3694 | return; | |
3695 | } | |
3696 | } | |
3697 | ||
3698 | return unless @padops && @padops == @entersubops; | |
3699 | ||
3700 | # there should be a balance: each padop has a corresponding | |
3701 | # 'attributes'->import() method call, in the same order. | |
3702 | ||
3703 | my @varnames; | |
3704 | my $attr_text; | |
3705 | ||
3706 | for my $i (0..$#padops) { | |
3707 | my $padop = $padops[$i]; | |
3708 | my $esop = $entersubops[$i]; | |
3709 | ||
3710 | push @varnames, $self->padname($padop->targ); | |
3711 | ||
3712 | return unless ($esop->flags & OPf_KIDS); | |
3713 | ||
3714 | my $kid = $esop->first; | |
3715 | return unless $kid->type == OP_PUSHMARK; | |
3716 | ||
3717 | $kid = $kid->sibling; | |
3718 | return unless $$kid && $kid->type == OP_CONST; | |
3719 | return unless $self->const_sv($kid)->PV eq 'attributes'; | |
3720 | ||
3721 | $kid = $kid->sibling; | |
3722 | return unless $$kid && $kid->type == OP_CONST; # __PACKAGE__ | |
3723 | ||
3724 | $kid = $kid->sibling; | |
3725 | return unless $$kid | |
3726 | && $kid->name eq "srefgen" | |
3727 | && ($kid->flags & OPf_KIDS) | |
3728 | && ($kid->first->flags & OPf_KIDS) | |
3729 | && $kid->first->first->name =~ /^pad[sah]v$/ | |
3730 | && $kid->first->first->targ == $padop->targ; | |
3731 | ||
3732 | $kid = $kid->sibling; | |
3733 | my @attr; | |
3734 | while ($$kid) { | |
3735 | last if ($kid->type != OP_CONST); | |
3736 | push @attr, $self->const_sv($kid)->PV; | |
3737 | $kid = $kid->sibling; | |
3738 | } | |
3739 | return unless @attr; | |
3740 | my $thisattr = ":" . join(' ', @attr); | |
3741 | $attr_text //= $thisattr; | |
3742 | # all import calls must have the same list of attributes | |
3743 | return unless $attr_text eq $thisattr; | |
3744 | ||
3745 | return unless $kid->name eq 'method_named'; | |
3746 | return unless $self->meth_sv($kid)->PV eq 'import'; | |
3747 | ||
3748 | $kid = $kid->sibling; | |
3749 | return if $$kid; | |
3750 | } | |
3751 | ||
4a4aa6e0 | 3752 | my $res = $decl; |
82ab48fa DM |
3753 | $res .= " $class " if $class ne 'main'; |
3754 | $res .= | |
3755 | (@varnames > 1) | |
3756 | ? "(" . join(', ', @varnames) . ')' | |
3757 | : " $varnames[0]"; | |
3758 | ||
3759 | return "$res $attr_text"; | |
3760 | } | |
3761 | ||
3762 | ||
6e90668e SM |
3763 | sub pp_list { |
3764 | my $self = shift; | |
9d2c6865 | 3765 | my($op, $cx) = @_; |
82ab48fa DM |
3766 | |
3767 | { | |
3768 | # might be my ($s,@a,%h) :Foo(bar); | |
4a4aa6e0 | 3769 | my $my_attr = maybe_var_attr($self, $op, $cx); |
82ab48fa DM |
3770 | return $my_attr if defined $my_attr; |
3771 | } | |
3772 | ||
6e90668e SM |
3773 | my($expr, @exprs); |
3774 | my $kid = $op->first->sibling; # skip pushmark | |
958ed56b | 3775 | return '' if class($kid) eq 'NULL'; |
6e90668e | 3776 | my $lop; |
3462b4ac | 3777 | my $local = "either"; # could be local(...), my(...), state(...) or our(...) |
56cd2ef8 | 3778 | my $type; |
6e90668e | 3779 | for ($lop = $kid; !null($lop); $lop = $lop->sibling) { |
3b4e80b8 | 3780 | my $lopname = $lop->name; |
5f4d8496 | 3781 | my $loppriv = $lop->private; |
56cd2ef8 | 3782 | my $newtype; |
12cea2fa | 3783 | if ($lopname =~ /^pad[ash]v$/ && $loppriv & OPpLVAL_INTRO) { |
5f4d8496 FC |
3784 | if ($loppriv & OPpPAD_STATE) { # state() |
3785 | ($local = "", last) if $local !~ /^(?:either|state)$/; | |
3462b4ac RGS |
3786 | $local = "state"; |
3787 | } else { # my() | |
5f4d8496 | 3788 | ($local = "", last) if $local !~ /^(?:either|my)$/; |
3462b4ac RGS |
3789 | $local = "my"; |
3790 | } | |
56cd2ef8 FC |
3791 | my $padname = $self->padname_sv($lop->targ); |
3792 | if ($padname->FLAGS & SVpad_TYPED) { | |
3793 | $newtype = $padname->SvSTASH->NAME; | |
3794 | } | |
3b4e80b8 | 3795 | } elsif ($lopname =~ /^(?:gv|rv2)([ash])v$/ |
5f4d8496 | 3796 | && $loppriv & OPpOUR_INTRO |
40ced2f4 FC |
3797 | or $lopname eq "null" && class($lop) eq 'UNOP' |
3798 | && $lop->first->name eq "gvsv" | |
b8e103fc | 3799 | && $lop->first->private & OPpOUR_INTRO) { # our() |
5f4d8496 FC |
3800 | my $newlocal = "local " x !!($loppriv & OPpLVAL_INTRO) . "our"; |
3801 | ($local = "", last) | |
3802 | if $local ne 'either' && $local ne $newlocal; | |
3803 | $local = $newlocal; | |
56cd2ef8 FC |
3804 | my $funny = !$1 || $1 eq 's' ? '$' : $1 eq 'a' ? '@' : '%'; |
3805 | if (my $t = $self->find_our_type( | |
3806 | $funny . $self->gv_or_padgv($lop->first)->NAME | |
3807 | )) { | |
3808 | $newtype = $t; | |
3809 | } | |
12cea2fa FC |
3810 | } elsif ($lopname ne 'undef' |
3811 | and !($loppriv & OPpLVAL_INTRO) | |
3812 | || !exists $uses_intro{$lopname eq 'null' | |
3813 | ? substr B::ppname($lop->targ), 3 | |
3814 | : $lopname}) | |
3815 | { | |
3816 | $local = ""; # or not | |
3817 | last; | |
3818 | } elsif ($lopname ne "undef") | |
3ac6e0f9 RGS |
3819 | { |
3820 | # local() | |
5f4d8496 | 3821 | ($local = "", last) if $local !~ /^(?:either|local)$/; |
6e90668e SM |
3822 | $local = "local"; |
3823 | } | |
56cd2ef8 FC |
3824 | if (defined $type && defined $newtype && $newtype ne $type) { |
3825 | $local = ''; | |
3826 | last; | |
3827 | } | |
3828 | $type = $newtype; | |
6e90668e SM |
3829 | } |
3830 | $local = "" if $local eq "either"; # no point if it's all undefs | |
5f4d8496 | 3831 | $local &&= join ' ', map $self->keyword($_), split / /, $local; |
56cd2ef8 | 3832 | $local .= " $type " if $local && length $type; |
f5aa8f4e | 3833 | return $self->deparse($kid, $cx) if null $kid->sibling and not $local; |
6e90668e SM |
3834 | for (; !null($kid); $kid = $kid->sibling) { |
3835 | if ($local) { | |
3f872cb9 | 3836 | if (class($kid) eq "UNOP" and $kid->first->name eq "gvsv") { |
6e90668e SM |
3837 | $lop = $kid->first; |
3838 | } else { | |
3839 | $lop = $kid; | |
3840 | } | |
3841 | $self->{'avoid_local'}{$$lop}++; | |
9d2c6865 | 3842 | $expr = $self->deparse($kid, 6); |
6e90668e SM |
3843 | delete $self->{'avoid_local'}{$$lop}; |
3844 | } else { | |
9d2c6865 | 3845 | $expr = $self->deparse($kid, 6); |
6e90668e SM |
3846 | } |
3847 | push @exprs, $expr; | |
3848 | } | |
9d2c6865 | 3849 | if ($local) { |
c4874d8a DM |
3850 | if (@exprs == 1 && ($local eq 'state' || $local eq 'CORE::state')) { |
3851 | # 'state @a = ...' is legal, while 'state(@a) = ...' currently isn't | |
3852 | return "$local $exprs[0]"; | |
3853 | } | |
9d2c6865 SM |
3854 | return "$local(" . join(", ", @exprs) . ")"; |
3855 | } else { | |
3856 | return $self->maybe_parens( join(", ", @exprs), $cx, 6); | |
3857 | } | |
6e90668e SM |
3858 | } |
3859 | ||
6f611a1a GS |
3860 | sub is_ifelse_cont { |
3861 | my $op = shift; | |
3862 | return ($op->name eq "null" and class($op) eq "UNOP" | |
3863 | and $op->first->name =~ /^(and|cond_expr)$/ | |
3864 | and is_scope($op->first->first->sibling)); | |
3865 | } | |
3866 | ||
6e90668e SM |
3867 | sub pp_cond_expr { |
3868 | my $self = shift; | |
9d2c6865 | 3869 | my($op, $cx) = @_; |
6e90668e SM |
3870 | my $cond = $op->first; |
3871 | my $true = $cond->sibling; | |
3872 | my $false = $true->sibling; | |
9d2c6865 | 3873 | my $cuddle = $self->{'cuddle'}; |
d989cdac | 3874 | unless ($cx < 1 and (is_scope($true) and $true->name ne "null") and |
58cccf98 SM |
3875 | (is_scope($false) || is_ifelse_cont($false)) |
3876 | and $self->{'expand'} < 7) { | |
f5aa8f4e | 3877 | $cond = $self->deparse($cond, 8); |
cfaba469 | 3878 | $true = $self->deparse($true, 6); |
9d2c6865 SM |
3879 | $false = $self->deparse($false, 8); |
3880 | return $self->maybe_parens("$cond ? $true : $false", $cx, 8); | |
6f611a1a GS |
3881 | } |
3882 | ||
f5aa8f4e | 3883 | $cond = $self->deparse($cond, 1); |
d989cdac | 3884 | $true = $self->deparse($true, 0); |
7741ceed | 3885 | my $head = $self->keyword("if") . " ($cond) {\n\t$true\n\b}"; |
6f611a1a | 3886 | my @elsifs; |
7741ceed | 3887 | my $elsif; |
6f611a1a GS |
3888 | while (!null($false) and is_ifelse_cont($false)) { |
3889 | my $newop = $false->first; | |
3890 | my $newcond = $newop->first; | |
3891 | my $newtrue = $newcond->sibling; | |
3892 | $false = $newtrue->sibling; # last in chain is OP_AND => no else | |
7ecdd211 PJ |
3893 | if ($newcond->name eq "lineseq") |
3894 | { | |
3895 | # lineseq to ensure correct line numbers in elsif() | |
3896 | # Bug #37302 fixed by change #33710. | |
3897 | $newcond = $newcond->first->sibling; | |
3898 | } | |
6f611a1a GS |
3899 | $newcond = $self->deparse($newcond, 1); |
3900 | $newtrue = $self->deparse($newtrue, 0); | |
7741ceed FC |
3901 | $elsif ||= $self->keyword("elsif"); |
3902 | push @elsifs, "$elsif ($newcond) {\n\t$newtrue\n\b}"; | |
6f611a1a | 3903 | } |
d989cdac | 3904 | if (!null($false)) { |
7741ceed | 3905 | $false = $cuddle . $self->keyword("else") . " {\n\t" . |
6f611a1a GS |
3906 | $self->deparse($false, 0) . "\n\b}\cK"; |
3907 | } else { | |
3908 | $false = "\cK"; | |
6e90668e | 3909 | } |
d989cdac | 3910 | return $head . join($cuddle, "", @elsifs) . $false; |
6e90668e SM |
3911 | } |
3912 | ||
95562366 NC |
3913 | sub pp_once { |
3914 | my ($self, $op, $cx) = @_; | |
3915 | my $cond = $op->first; | |
3916 | my $true = $cond->sibling; | |
3917 | ||
a1b22abd FC |
3918 | my $ret = $self->deparse($true, $cx); |
3919 | $ret =~ s/^(\(?)\$/$1 . $self->keyword("state") . ' $'/e; | |
3920 | $ret; | |
95562366 NC |
3921 | } |
3922 | ||
58cccf98 | 3923 | sub loop_common { |
6e90668e | 3924 | my $self = shift; |
58cccf98 | 3925 | my($op, $cx, $init) = @_; |
6e90668e SM |
3926 | my $enter = $op->first; |
3927 | my $kid = $enter->sibling; | |
0ced6c29 RGS |
3928 | local(@$self{qw'curstash warnings hints hinthash'}) |
3929 | = @$self{qw'curstash warnings hints hinthash'}; | |
6e90668e | 3930 | my $head = ""; |
9d2c6865 | 3931 | my $bare = 0; |
58cccf98 SM |
3932 | my $body; |
3933 | my $cond = undef; | |
22584011 | 3934 | my $name; |
d989cdac | 3935 | if ($kid->name eq "lineseq") { # bare or infinite loop |
241416b8 | 3936 | if ($kid->last->name eq "unstack") { # infinite |
e99ebc55 | 3937 | $head = "while (1) "; # Can't use for(;;) if there's a continue |
58cccf98 | 3938 | $cond = ""; |
9d2c6865 SM |
3939 | } else { |
3940 | $bare = 1; | |
6e90668e | 3941 | } |
58cccf98 | 3942 | $body = $kid; |
3f872cb9 | 3943 | } elsif ($enter->name eq "enteriter") { # foreach |
6e90668e SM |
3944 | my $ary = $enter->first->sibling; # first was pushmark |
3945 | my $var = $ary->sibling; | |
36d57d93 RGS |
3946 | if ($ary->name eq 'null' and $enter->private & OPpITER_REVERSED) { |
3947 | # "reverse" was optimised away | |
aae53c41 | 3948 | $ary = listop($self, $ary->first->sibling, 1, 'reverse'); |
36d57d93 | 3949 | } elsif ($enter->flags & OPf_STACKED |
f5aa8f4e SM |
3950 | and not null $ary->first->sibling->sibling) |
3951 | { | |
d7f5b6da SM |
3952 | $ary = $self->deparse($ary->first->sibling, 9) . " .. " . |
3953 | $self->deparse($ary->first->sibling->sibling, 9); | |
d8d95777 GA |
3954 | } else { |
3955 | $ary = $self->deparse($ary, 1); | |
3956 | } | |
bf6e71ff NC |
3957 | my $iter_targ = $kid->first->first->targ; |
3958 | if ($iter_targ) { | |
3959 | # for my ($foo, $bar) () stores the count (less 1) in the targ of | |
3960 | # the ITER op. | |
3961 | my @vars; | |
3962 | my $targ = $enter->targ; | |
3963 | while ($iter_targ-- >= 0) { | |
3964 | push @vars, $self->padname_sv($targ)->PVX; | |
3965 | ++$targ; | |
3966 | } | |
3967 | $var = 'my (' . join(', ', @vars) . ')'; | |
3968 | } elsif (null $var) { | |
dacd2ca7 | 3969 | $var = $self->pp_padsv($enter, 1, 1); |
3f872cb9 | 3970 | } elsif ($var->name eq "rv2gv") { |
9d2c6865 | 3971 | $var = $self->pp_rv2sv($var, 1); |
241416b8 DM |
3972 | if ($enter->private & OPpOUR_INTRO) { |
3973 | # our declarations don't have package names | |
3974 | $var =~ s/^(.).*::/$1/; | |
3975 | $var = "our $var"; | |
3976 | } | |
3f872cb9 | 3977 | } elsif ($var->name eq "gv") { |
9d2c6865 | 3978 | $var = "\$" . $self->deparse($var, 1); |
9187b6e4 FC |
3979 | } else { |
3980 | $var = $self->deparse($var, 1); | |
6e90668e | 3981 | } |
58cccf98 | 3982 | $body = $kid->first->first->sibling; # skip OP_AND and OP_ITER |
afb60448 | 3983 | if (!is_state $body->first and $body->first->name !~ /^(?:stub|leave|scope)$/) { |
cf24a840 SM |
3984 | confess unless $var eq '$_'; |
3985 | $body = $body->first; | |
7741ceed FC |
3986 | return $self->deparse($body, 2) . " " |
3987 | . $self->keyword("foreach") . " ($ary)"; | |
cf24a840 SM |
3988 | } |
3989 | $head = "foreach $var ($ary) "; | |
3f872cb9 | 3990 | } elsif ($kid->name eq "null") { # while/until |
6e90668e | 3991 | $kid = $kid->first; |
22584011 FC |
3992 | $name = {"and" => "while", "or" => "until"}->{$kid->name}; |
3993 | $cond = $kid->first; | |
58cccf98 | 3994 | $body = $kid->first->sibling; |
3f872cb9 | 3995 | } elsif ($kid->name eq "stub") { # bare and empty |
9d2c6865 | 3996 | return "{;}"; # {} could be a hashref |
6e90668e | 3997 | } |
58cccf98 | 3998 | # If there isn't a continue block, then the next pointer for the loop |
241416b8 | 3999 | # will point to the unstack, which is kid's last child, except |
58cccf98 | 4000 | # in a bare loop, when it will point to the leaveloop. When neither of |
241416b8 | 4001 | # these conditions hold, then the second-to-last child is the continue |
58cccf98 SM |
4002 | # block (or the last in a bare loop). |
4003 | my $cont_start = $enter->nextop; | |
4004 | my $cont; | |
22584011 FC |
4005 | my $precond; |
4006 | my $postcond; | |
241416b8 | 4007 | if ($$cont_start != $$op && ${$cont_start} != ${$body->last}) { |
58cccf98 SM |
4008 | if ($bare) { |
4009 | $cont = $body->last; | |
4010 | } else { | |
4011 | $cont = $body->first; | |
241416b8 | 4012 | while (!null($cont->sibling->sibling)) { |
58cccf98 SM |
4013 | $cont = $cont->sibling; |
4014 | } | |
4015 | } | |
4016 | my $state = $body->first; | |
4017 | my $cuddle = $self->{'cuddle'}; | |
4018 | my @states; | |
4019 | for (; $$state != $$cont; $state = $state->sibling) { | |
4020 | push @states, $state; | |
4021 | } | |
93a8ff62 | 4022 | $body = $self->lineseq(undef, 0, @states); |
58cccf98 | 4023 | if (defined $cond and not is_scope $cont and $self->{'expand'} < 3) { |
22584011 FC |
4024 | $precond = "for ($init; "; |
4025 | $postcond = "; " . $self->deparse($cont, 1) .") "; | |
58cccf98 SM |
4026 | $cont = "\cK"; |
4027 | } else { | |
4028 | $cont = $cuddle . "continue {\n\t" . | |
4029 | $self->deparse($cont, 0) . "\n\b}\cK"; | |
6e90668e | 4030 | } |
6e90668e | 4031 | } else { |
7a9b44b9 | 4032 | return "" if !defined $body; |
c73811ab | 4033 | if (length $init) { |
22584011 FC |
4034 | $precond = "for ($init; "; |
4035 | $postcond = ";) "; | |
c73811ab | 4036 | } |
9d2c6865 | 4037 | $cont = "\cK"; |
58cccf98 | 4038 | $body = $self->deparse($body, 0); |
6e90668e | 4039 | } |
22584011 | 4040 | if ($precond) { # for(;;) |
88a758b5 FC |
4041 | $cond &&= $name eq 'until' |
4042 | ? listop($self, undef, 1, "not", $cond->first) | |
4043 | : $self->deparse($cond, 1); | |
22584011 FC |
4044 | $head = "$precond$cond$postcond"; |
4045 | } | |
4046 | if ($name && !$head) { | |
4047 | ref $cond and $cond = $self->deparse($cond, 1); | |
4048 | $head = "$name ($cond) "; | |
4049 | } | |
7741ceed | 4050 | $head =~ s/^(for(?:each)?|while|until)/$self->keyword($1)/e; |
ce4e655d | 4051 | $body =~ s/;?$/;\n/; |
34a48b4b RH |
4052 | |
4053 | return $head . "{\n\t" . $body . "\b}" . $cont; | |
58cccf98 SM |
4054 | } |
4055 | ||
09d856fb | 4056 | sub pp_leaveloop { shift->loop_common(@_, "") } |
58cccf98 SM |
4057 | |
4058 | sub for_loop { | |
4059 | my $self = shift; | |
4060 | my($op, $cx) = @_; | |
4061 | my $init = $self->deparse($op, 1); | |
eae48c89 Z |
4062 | my $s = $op->sibling; |
4063 | my $ll = $s->name eq "unstack" ? $s->sibling : $s->first->sibling; | |
4064 | return $self->loop_common($ll, $cx, $init); | |
6e90668e SM |
4065 | } |
4066 | ||
4067 | sub pp_leavetry { | |
4068 | my $self = shift; | |
9d2c6865 | 4069 | return "eval {\n\t" . $self->pp_leave(@_) . "\n\b}"; |
bd0865ec | 4070 | } |
6e90668e | 4071 | |
683e0651 PE |
4072 | sub pp_leavetrycatch { |
4073 | my $self = shift; | |
4074 | my ($op) = @_; | |
4075 | ||
4076 | # Expect that the first three kids should be (entertrycatch, poptry, catch) | |
4077 | my $entertrycatch = $op->first; | |
4078 | $entertrycatch->name eq "entertrycatch" or die "Expected entertrycatch as first child of leavetrycatch"; | |
4079 | ||
4080 | my $tryblock = $entertrycatch->sibling; | |
4081 | $tryblock->name eq "poptry" or die "Expected poptry as second child of leavetrycatch"; | |
4082 | ||
4083 | my $catch = $tryblock->sibling; | |
4084 | $catch->name eq "catch" or die "Expected catch as third child of leavetrycatch"; | |
4085 | ||
4086 | my $catchblock = $catch->first->sibling; | |
846e32eb MH |
4087 | my $name = $catchblock->name; |
4088 | unless ($name eq "scope" || $name eq "leave") { | |
4089 | die "Expected scope or leave as second child of catch, got $name instead"; | |
4090 | } | |
683e0651 PE |
4091 | |
4092 | my $trycode = scopeop(0, $self, $tryblock); | |
4093 | my $catchvar = $self->padname($catch->targ); | |
846e32eb MH |
4094 | my $catchcode = $name eq 'scope' ? scopeop(0, $self, $catchblock) |
4095 | : scopeop(1, $self, $catchblock); | |
683e0651 PE |
4096 | |
4097 | return "try {\n\t$trycode\n\b}\n" . | |
4098 | "catch($catchvar) {\n\t$catchcode\n\b}\cK"; | |
4099 | } | |
4100 | ||
7d3c8a68 S |
4101 | sub _op_is_or_was { |
4102 | my ($op, $expect_type) = @_; | |
4103 | my $type = $op->type; | |
4104 | return($type == $expect_type | |
4105 | || ($type == OP_NULL && $op->targ == $expect_type)); | |
4106 | } | |
4107 | ||
a798dbf2 | 4108 | sub pp_null { |
34b54951 | 4109 | my($self, $op, $cx) = @_; |
82ab48fa DM |
4110 | |
4111 | # might be 'my $s :Foo(bar);' | |
4112 | if ($op->targ == OP_LIST) { | |
4a4aa6e0 | 4113 | my $my_attr = maybe_var_attr($self, $op, $cx); |
82ab48fa DM |
4114 | return $my_attr if defined $my_attr; |
4115 | } | |
4116 | ||
6e90668e | 4117 | if (class($op) eq "OP") { |
f4a44678 SM |
4118 | # old value is lost |
4119 | return $self->{'ex_const'} if $op->targ == OP_CONST; | |
619dadb5 | 4120 | } elsif (class ($op) eq "COP") { |
34b54951 | 4121 | return &pp_nextstate; |
7d3c8a68 S |
4122 | } elsif ($op->first->name eq 'pushmark' |
4123 | or $op->first->name eq 'null' | |
4124 | && $op->first->targ == OP_PUSHMARK | |
4125 | && _op_is_or_was($op, OP_LIST)) { | |
9d2c6865 | 4126 | return $self->pp_list($op, $cx); |
3f872cb9 | 4127 | } elsif ($op->first->name eq "enter") { |
9d2c6865 | 4128 | return $self->pp_leave($op, $cx); |
31c6271a RD |
4129 | } elsif ($op->first->name eq "leave") { |
4130 | return $self->pp_leave($op->first, $cx); | |
4131 | } elsif ($op->first->name eq "scope") { | |
4132 | return $self->pp_scope($op->first, $cx); | |
bd0865ec | 4133 | } elsif ($op->targ == OP_STRINGIFY) { |
6f611a1a | 4134 | return $self->dquote($op, $cx); |
f4002a4b FC |
4135 | } elsif ($op->targ == OP_GLOB) { |
4136 | return $self->pp_glob( | |
4137 | $op->first # entersub | |
4138 | ->first # ex-list | |
4139 | ->first # pushmark | |
4140 | ->sibling, # glob | |
4141 | $cx | |
4142 | ); | |
6e90668e | 4143 | } elsif (!null($op->first->sibling) and |
3f872cb9 | 4144 | $op->first->sibling->name eq "readline" and |
6e90668e | 4145 | $op->first->sibling->flags & OPf_STACKED) { |
9d2c6865 SM |
4146 | return $self->maybe_parens($self->deparse($op->first, 7) . " = " |
4147 | . $self->deparse($op->first->sibling, 7), | |
4148 | $cx, 7); | |
6e90668e | 4149 | } elsif (!null($op->first->sibling) and |
d52196e1 | 4150 | $op->first->sibling->name =~ /^transr?\z/ and |
6e90668e | 4151 | $op->first->sibling->flags & OPf_STACKED) { |
9d2c6865 SM |
4152 | return $self->maybe_parens($self->deparse($op->first, 20) . " =~ " |
4153 | . $self->deparse($op->first->sibling, 20), | |
4154 | $cx, 20); | |
d989cdac | 4155 | } elsif ($op->flags & OPf_SPECIAL && $cx < 1 && !$op->targ) { |
3188a821 FC |
4156 | return ($self->lex_in_scope("&do") ? "CORE::do" : "do") |
4157 | . " {\n\t". $self->deparse($op->first, $cx) ."\n\b};"; | |
ad8caead RGS |
4158 | } elsif (!null($op->first->sibling) and |
4159 | $op->first->sibling->name eq "null" and | |
4160 | class($op->first->sibling) eq "UNOP" and | |
4161 | $op->first->sibling->first->flags & OPf_STACKED and | |
4162 | $op->first->sibling->first->name eq "rcatline") { | |
4163 | return $self->maybe_parens($self->deparse($op->first, 18) . " .= " | |
4164 | . $self->deparse($op->first->sibling, 18), | |
4165 | $cx, 18); | |
6e90668e | 4166 | } else { |
9d2c6865 | 4167 | return $self->deparse($op->first, $cx); |
6e90668e | 4168 | } |
a798dbf2 MB |
4169 | } |
4170 | ||
6e90668e SM |
4171 | sub padname { |
4172 | my $self = shift; | |
4173 | my $targ = shift; | |
68223ea3 | 4174 | return $self->padname_sv($targ)->PVX; |
6e90668e SM |
4175 | } |
4176 | ||
4177 | sub padany { | |
4178 | my $self = shift; | |
4179 | my $op = shift; | |
4180 | return substr($self->padname($op->targ), 1); # skip $/@/% | |
4181 | } | |
4182 | ||
4183 | sub pp_padsv { | |
4184 | my $self = shift; | |
4da9a2ca | 4185 | my($op, $cx, $forbid_parens) = @_; |
8db6f480 FC |
4186 | my $targ = $op->targ; |
4187 | return $self->maybe_my($op, $cx, $self->padname($targ), | |
4188 | $self->padname_sv($targ), | |
4da9a2ca | 4189 | $forbid_parens); |
6e90668e SM |
4190 | } |
4191 | ||
4192 | sub pp_padav { pp_padsv(@_) } | |
748f2c65 | 4193 | |
ed34dca8 DM |
4194 | # prepend 'keys' where its been optimised away, with suitable handling |
4195 | # of CORE:: and parens | |
4196 | ||
4197 | sub add_keys_keyword { | |
4198 | my ($self, $str, $cx) = @_; | |
4199 | $str = $self->maybe_parens($str, $cx, 16); | |
4200 | # 'keys %h' versus 'keys(%h)' | |
4201 | $str = " $str" unless $str =~ /^\(/; | |
4202 | return $self->keyword("keys") . $str; | |
4203 | } | |
4204 | ||
748f2c65 | 4205 | sub pp_padhv { |
ed34dca8 DM |
4206 | my ($self, $op, $cx) = @_; |
4207 | my $str = pp_padsv(@_); | |
6f2dc9a6 DM |
4208 | # with OPpPADHV_ISKEYS the keys op is optimised away, except |
4209 | # in scalar context the old op is kept (but not executed) so its targ | |
4210 | # can be used. | |
ed34dca8 DM |
4211 | if ( ($op->private & OPpPADHV_ISKEYS) |
4212 | && !(($op->flags & OPf_WANT) == OPf_WANT_SCALAR)) | |
4213 | { | |
4214 | $str = $self->add_keys_keyword($str, $cx); | |
4215 | } | |
4216 | $str; | |
748f2c65 | 4217 | } |
6e90668e | 4218 | |
6f611a1a | 4219 | sub gv_or_padgv { |
18228111 GS |
4220 | my $self = shift; |
4221 | my $op = shift; | |
6f611a1a GS |
4222 | if (class($op) eq "PADOP") { |
4223 | return $self->padval($op->padix); | |
4224 | } else { # class($op) eq "SVOP" | |
4225 | return $op->gv; | |
18228111 | 4226 | } |
18228111 GS |
4227 | } |
4228 | ||
6e90668e SM |
4229 | sub pp_gvsv { |
4230 | my $self = shift; | |
9d2c6865 | 4231 | my($op, $cx) = @_; |
6f611a1a | 4232 | my $gv = $self->gv_or_padgv($op); |
8510e997 | 4233 | return $self->maybe_local($op, $cx, $self->stash_variable("\$", |
bb8996b8 | 4234 | $self->gv_name($gv), $cx)); |
6e90668e SM |
4235 | } |
4236 | ||
4237 | sub pp_gv { | |
4238 | my $self = shift; | |
9d2c6865 | 4239 | my($op, $cx) = @_; |
6f611a1a | 4240 | my $gv = $self->gv_or_padgv($op); |
dd666160 | 4241 | return $self->maybe_qualify("", $self->gv_name($gv)); |
6e90668e SM |
4242 | } |
4243 | ||
93bad3fd NC |
4244 | sub pp_aelemfast_lex { |
4245 | my $self = shift; | |
4246 | my($op, $cx) = @_; | |
4247 | my $name = $self->padname($op->targ); | |
4248 | $name =~ s/^@/\$/; | |
b024352e DM |
4249 | my $i = $op->private; |
4250 | $i -= 256 if $i > 127; | |
8a38acca | 4251 | return $name . "[$i]"; |
93bad3fd NC |
4252 | } |
4253 | ||
6e90668e SM |
4254 | sub pp_aelemfast { |
4255 | my $self = shift; | |
9d2c6865 | 4256 | my($op, $cx) = @_; |
93bad3fd NC |
4257 | # optimised PADAV, pre 5.15 |
4258 | return $self->pp_aelemfast_lex(@_) if ($op->flags & OPf_SPECIAL); | |
ce4e655d | 4259 | |
93bad3fd | 4260 | my $gv = $self->gv_or_padgv($op); |
be6cf5cf FC |
4261 | my($name,$quoted) = $self->stash_variable_name('@',$gv); |
4262 | $name = $quoted ? "$name->" : '$' . $name; | |
b024352e DM |
4263 | my $i = $op->private; |
4264 | $i -= 256 if $i > 127; | |
8a38acca | 4265 | return $name . "[$i]"; |
6e90668e SM |
4266 | } |
4267 | ||
4268 | sub rv2x { | |
4269 | my $self = shift; | |
9d2c6865 | 4270 | my($op, $cx, $type) = @_; |
90c0eb26 RH |
4271 | |
4272 | if (class($op) eq 'NULL' || !$op->can("first")) { | |
ff97752d | 4273 | carp("Unexpected op in pp_rv2x"); |
90c0eb26 RH |
4274 | return 'XXX'; |
4275 | } | |
6e90668e | 4276 | my $kid = $op->first; |
d989cdac | 4277 | if ($kid->name eq "gv") { |
dd666160 Z |
4278 | return $self->stash_variable($type, |
4279 | $self->gv_name($self->gv_or_padgv($kid)), $cx); | |
d989cdac SM |
4280 | } elsif (is_scalar $kid) { |
4281 | my $str = $self->deparse($kid, 0); | |
4282 | if ($str =~ /^\$([^\w\d])\z/) { | |
4283 | # "$$+" isn't a legal way to write the scalar dereference | |
4284 | # of $+, since the lexer can't tell you aren't trying to | |
4285 | # do something like "$$ + 1" to get one more than your | |
4286 | # PID. Either "${$+}" or "$${+}" are workable | |
4287 | # disambiguations, but if the programmer did the former, | |
4288 | # they'd be in the "else" clause below rather than here. | |
4289 | # It's not clear if this should somehow be unified with | |
4290 | # the code in dq and re_dq that also adds lexer | |
4291 | # disambiguation braces. | |
4292 | $str = '$' . "{$1}"; #' | |
4293 | } | |
4294 | return $type . $str; | |
4295 | } else { | |
4296 | return $type . "{" . $self->deparse($kid, 0) . "}"; | |
4297 | } | |
6e90668e SM |
4298 | } |
4299 | ||
4300 | sub pp_rv2sv { maybe_local(@_, rv2x(@_, "\$")) } | |
6e90668e SM |
4301 | sub pp_rv2gv { maybe_local(@_, rv2x(@_, "*")) } |
4302 | ||
748f2c65 | 4303 | sub pp_rv2hv { |
ed34dca8 DM |
4304 | my ($self, $op, $cx) = @_; |
4305 | my $str = rv2x(@_, "%"); | |
4306 | if ($op->private & OPpRV2HV_ISKEYS) { | |
4307 | $str = $self->add_keys_keyword($str, $cx); | |
4308 | } | |
4309 | return maybe_local(@_, $str); | |
748f2c65 DM |
4310 | } |
4311 | ||
6e90668e SM |
4312 | # skip rv2av |
4313 | sub pp_av2arylen { | |
4314 | my $self = shift; | |
9d2c6865 | 4315 | my($op, $cx) = @_; |
89a395f4 DM |
4316 | my $kid = $op->first; |
4317 | if ($kid->name eq "padav") { | |
4318 | return $self->maybe_local($op, $cx, '$#' . $self->padany($kid)); | |
6e90668e | 4319 | } else { |
89a395f4 DM |
4320 | my $kkid; |
4321 | if ( $kid->name eq "rv2av" | |
4322 | && ($kkid = $kid->first) | |
4323 | && $kkid->name !~ /^(scope|leave|gv)$/) | |
4324 | { | |
4325 | # handle (expr)->$#* postfix form | |
4326 | my $expr; | |
4327 | $expr = $self->deparse($kkid, 24); # 24 is '->' | |
4328 | $expr = "$expr->\$#*"; | |
4329 | # XXX maybe_local is probably wrong here: local($#-expression) | |
4330 | # doesn't "do" local (the is no INTRO flag set) | |
4331 | return $self->maybe_local($op, $cx, $expr); | |
4332 | } | |
4333 | else { | |
4334 | # handle $#{expr} form | |
4335 | # XXX see maybe_local comment above | |
4336 | return $self->maybe_local($op, $cx, $self->rv2x($kid, $cx, '$#')); | |
4337 | } | |
6e90668e SM |
4338 | } |
4339 | } | |
4340 | ||
4341 | # skip down to the old, ex-rv2cv | |
90c0eb26 RH |
4342 | sub pp_rv2cv { |
4343 | my ($self, $op, $cx) = @_; | |
4344 | if (!null($op->first) && $op->first->name eq 'null' && | |
76e14ed3 | 4345 | $op->first->targ == OP_LIST) |
90c0eb26 RH |
4346 | { |
4347 | return $self->rv2x($op->first->first->sibling, $cx, "&") | |
4348 | } | |
4349 | else { | |
4350 | return $self->rv2x($op, $cx, "") | |
4351 | } | |
4352 | } | |
6e90668e | 4353 | |
d989cdac SM |
4354 | sub list_const { |
4355 | my $self = shift; | |
4356 | my($cx, @list) = @_; | |
4357 | my @a = map $self->const($_, 6), @list; | |
4358 | if (@a == 0) { | |
4359 | return "()"; | |
4360 | } elsif (@a == 1) { | |
4361 | return $a[0]; | |
4362 | } elsif ( @a > 2 and !grep(!/^-?\d+$/, @a)) { | |
4363 | # collapse (-1,0,1,2) into (-1..2) | |
4364 | my ($s, $e) = @a[0,-1]; | |
4365 | my $i = $s; | |
4366 | return $self->maybe_parens("$s..$e", $cx, 9) | |
4367 | unless grep $i++ != $_, @a; | |
4368 | } | |
4369 | return $self->maybe_parens(join(", ", @a), $cx, 6); | |
4370 | } | |
4371 | ||
6e90668e SM |
4372 | sub pp_rv2av { |
4373 | my $self = shift; | |
9d2c6865 | 4374 | my($op, $cx) = @_; |
6e90668e | 4375 | my $kid = $op->first; |
3f872cb9 | 4376 | if ($kid->name eq "const") { # constant list |
18228111 | 4377 | my $av = $self->const_sv($kid); |
d989cdac | 4378 | return $self->list_const($cx, $av->ARRAY); |
6e90668e | 4379 | } else { |
9d2c6865 | 4380 | return $self->maybe_local($op, $cx, $self->rv2x($op, $cx, "\@")); |
6e90668e SM |
4381 | } |
4382 | } | |
4383 | ||
3ed82cfc GS |
4384 | sub is_subscriptable { |
4385 | my $op = shift; | |
fedf30e1 | 4386 | if ($op->name =~ /^([ahg]elem|multideref$)/) { |
3ed82cfc GS |
4387 | return 1; |
4388 | } elsif ($op->name eq "entersub") { | |
4389 | my $kid = $op->first; | |
4390 | return 0 unless null $kid->sibling; | |
4391 | $kid = $kid->first; | |
4392 | $kid = $kid->sibling until null $kid->sibling; | |
4393 | return 0 if is_scope($kid); | |
4394 | $kid = $kid->first; | |
73582821 | 4395 | return 0 if $kid->name eq "gv" || $kid->name eq "padcv"; |
3ed82cfc GS |
4396 | return 0 if is_scalar($kid); |
4397 | return is_subscriptable($kid); | |
4398 | } else { | |
4399 | return 0; | |
4400 | } | |
4401 | } | |
6e90668e | 4402 | |
21b7468a BL |
4403 | sub elem_or_slice_array_name |
4404 | { | |
6e90668e | 4405 | my $self = shift; |
21b7468a BL |
4406 | my ($array, $left, $padname, $allow_arrow) = @_; |
4407 | ||
3f872cb9 | 4408 | if ($array->name eq $padname) { |
21b7468a | 4409 | return $self->padany($array); |
6e90668e | 4410 | } elsif (is_scope($array)) { # ${expr}[0] |
21b7468a | 4411 | return "{" . $self->deparse($array, 0) . "}"; |
ce4e655d | 4412 | } elsif ($array->name eq "gv") { |
10e8e32b FC |
4413 | ($array, my $quoted) = |
4414 | $self->stash_variable_name( | |
4415 | $left eq '[' ? '@' : '%', $self->gv_or_padgv($array) | |
4416 | ); | |
4417 | if (!$allow_arrow && $quoted) { | |
4418 | # This cannot happen. | |
4419 | die "Invalid variable name $array for slice"; | |
ce4e655d | 4420 | } |
10e8e32b | 4421 | return $quoted ? "$array->" : $array; |
21b7468a BL |
4422 | } elsif (!$allow_arrow || is_scalar $array) { # $x[0], $$x[0], ... |
4423 | return $self->deparse($array, 24); | |
6e90668e | 4424 | } else { |
21b7468a | 4425 | return undef; |
6e90668e | 4426 | } |
21b7468a BL |
4427 | } |
4428 | ||
4429 | sub elem_or_slice_single_index | |
4430 | { | |
4431 | my $self = shift; | |
4432 | my ($idx) = @_; | |
4433 | ||
9d2c6865 | 4434 | $idx = $self->deparse($idx, 1); |
7a9b44b9 RH |
4435 | |
4436 | # Outer parens in an array index will confuse perl | |
4437 | # if we're interpolating in a regular expression, i.e. | |
4438 | # /$x$foo[(-1)]/ is *not* the same as /$x$foo[-1]/ | |
4439 | # | |
4440 | # If $self->{parens}, then an initial '(' will | |
4441 | # definitely be paired with a final ')'. If | |
4442 | # !$self->{parens}, the misleading parens won't | |
4443 | # have been added in the first place. | |
4444 | # | |
4445 | # [You might think that we could get "(...)...(...)" | |
4446 | # where the initial and final parens do not match | |
4447 | # each other. But we can't, because the above would | |
4448 | # only happen if there's an infix binop between the | |
4449 | # two pairs of parens, and *that* means that the whole | |
4450 | # expression would be parenthesized as well.] | |
4451 | # | |
4452 | $idx =~ s/^\((.*)\)$/$1/ if $self->{'parens'}; | |
4453 | ||
098251bc RH |
4454 | # Hash-element braces will autoquote a bareword inside themselves. |
4455 | # We need to make sure that C<$hash{warn()}> doesn't come out as | |
4456 | # C<$hash{warn}>, which has a quite different meaning. Currently | |
4457 | # B::Deparse will always quote strings, even if the string was a | |
4458 | # bareword in the original (i.e. the OPpCONST_BARE flag is ignored | |
4459 | # for constant strings.) So we can cheat slightly here - if we see | |
4460 | # a bareword, we know that it is supposed to be a function call. | |
4461 | # | |
4462 | $idx =~ s/^([A-Za-z_]\w*)$/$1()/; | |
4463 | ||
21b7468a BL |
4464 | return $idx; |
4465 | } | |
4466 | ||
4467 | sub elem { | |
4468 | my $self = shift; | |
4469 | my ($op, $cx, $left, $right, $padname) = @_; | |
4470 | my($array, $idx) = ($op->first, $op->first->sibling); | |
4471 | ||
4472 | $idx = $self->elem_or_slice_single_index($idx); | |
4473 | ||
4474 | unless ($array->name eq $padname) { # Maybe this has been fixed | |
4475 | $array = $array->first; # skip rv2av (or ex-rv2av in _53+) | |
4476 | } | |
4477 | if (my $array_name=$self->elem_or_slice_array_name | |
4478 | ($array, $left, $padname, 1)) { | |
bcbe2b27 FC |
4479 | return ($array_name =~ /->\z/ |
4480 | ? $array_name | |
4481 | : $array_name eq '#' ? '${#}' : "\$" . $array_name) | |
10e8e32b | 4482 | . $left . $idx . $right; |
21b7468a BL |
4483 | } else { |
4484 | # $x[20][3]{hi} or expr->[20] | |
4485 | my $arrow = is_subscriptable($array) ? "" : "->"; | |
4486 | return $self->deparse($array, 24) . $arrow . $left . $idx . $right; | |
4487 | } | |
4488 | ||
6e90668e SM |
4489 | } |
4490 | ||
fedf30e1 DM |
4491 | # a simplified version of elem_or_slice_array_name() |
4492 | # for the use of pp_multideref | |
4493 | ||
4494 | sub multideref_var_name { | |
4495 | my $self = shift; | |
4496 | my ($gv, $is_hash) = @_; | |
4497 | ||
4498 | my ($name, $quoted) = | |
4499 | $self->stash_variable_name( $is_hash ? '%' : '@', $gv); | |
4500 | return $quoted ? "$name->" | |
4501 | : $name eq '#' | |
4502 | ? '${#}' # avoid ${#}[1] => $#[1] | |
4503 | : '$' . $name; | |
4504 | } | |
4505 | ||
4506 | ||
e839e6ed DM |
4507 | # deparse an OP_MULTICONCAT. If $in_dq is 1, we're within |
4508 | # a double-quoted string, so for example. | |
4509 | # "abc\Qdef$x\Ebar" | |
4510 | # might get compiled as | |
4511 | # multiconcat("abc", metaquote(multiconcat("def", $x)), "bar") | |
4512 | # and the inner multiconcat should be deparsed as C<def$x> rather than | |
4513 | # the normal C<def . $x> | |
4514 | # Ditto if $in_dq is 2, handle qr/...\Qdef$x\E.../. | |
4515 | ||
4516 | sub do_multiconcat { | |
4517 | my $self = shift; | |
4518 | my($op, $cx, $in_dq) = @_; | |
4519 | ||
4520 | my $kid; | |
4521 | my @kids; | |
4522 | my $assign; | |
4523 | my $append; | |
4524 | my $lhs = ""; | |
4525 | ||
4526 | for ($kid = $op->first; !null $kid; $kid = $kid->sibling) { | |
4527 | # skip the consts and/or padsv we've optimised away | |
4528 | push @kids, $kid | |
4529 | unless $kid->type == OP_NULL | |
4530 | && ( $kid->targ == OP_PADSV | |
4531 | || $kid->targ == OP_CONST | |
4532 | || $kid->targ == OP_PUSHMARK); | |
4533 | } | |
4534 | ||
4535 | $append = ($op->private & OPpMULTICONCAT_APPEND); | |
4536 | ||
4537 | if ($op->private & OPpTARGET_MY) { | |
4538 | # '$lex = ...' or '$lex .= ....' or 'my $lex = ' | |
4539 | $lhs = $self->padname($op->targ); | |
4540 | $lhs = "my $lhs" if ($op->private & OPpLVAL_INTRO); | |
4541 | $assign = 1; | |
4542 | } | |
4543 | elsif ($op->flags & OPf_STACKED) { | |
4544 | # 'expr = ...' or 'expr .= ....' | |
4545 | my $expr = $append ? shift(@kids) : pop(@kids); | |
4546 | $lhs = $self->deparse($expr, 7); | |
4547 | $assign = 1; | |
4548 | } | |
4549 | ||
4550 | if ($assign) { | |
4551 | $lhs .= $append ? ' .= ' : ' = '; | |
4552 | } | |
4553 | ||
4554 | my ($nargs, $const_str, @const_lens) = $op->aux_list($self->{curcv}); | |
4555 | ||
4556 | my @consts; | |
4557 | my $i = 0; | |
4558 | for (@const_lens) { | |
4559 | if ($_ == -1) { | |
4560 | push @consts, undef; | |
4561 | } | |
4562 | else { | |
4563 | push @consts, substr($const_str, $i, $_); | |
4564 | my @args; | |
4565 | $i += $_; | |
4566 | } | |
4567 | } | |
4568 | ||
4569 | my $rhs = ""; | |
4570 | ||
4571 | if ( $in_dq | |
4572 | || (($op->private & OPpMULTICONCAT_STRINGIFY) && !$self->{'unquote'})) | |
4573 | { | |
4574 | # "foo=$foo bar=$bar " | |
4575 | my $not_first; | |
4576 | while (@consts) { | |
b2362f9c DM |
4577 | if ($not_first) { |
4578 | my $s = $self->dq(shift(@kids), 18); | |
4579 | # don't deparse "a${$}b" as "a$$b" | |
4580 | $s = '${$}' if $s eq '$$'; | |
4581 | $rhs = dq_disambiguate($rhs, $s); | |
4582 | } | |
e839e6ed DM |
4583 | $not_first = 1; |
4584 | my $c = shift @consts; | |
4585 | if (defined $c) { | |
4586 | if ($in_dq == 2) { | |
4587 | # in pattern: don't convert newline to '\n' etc etc | |
4588 | my $s = re_uninterp(escape_re(re_unback($c))); | |
4589 | $rhs = re_dq_disambiguate($rhs, $s) | |
4590 | } | |
4591 | else { | |
4592 | my $s = uninterp(escape_str(unback($c))); | |
4593 | $rhs = dq_disambiguate($rhs, $s) | |
4594 | } | |
4595 | } | |
4596 | } | |
4597 | return $rhs if $in_dq; | |
4598 | $rhs = single_delim("qq", '"', $rhs, $self); | |
4599 | } | |
4600 | elsif ($op->private & OPpMULTICONCAT_FAKE) { | |
4601 | # sprintf("foo=%s bar=%s ", $foo, $bar) | |
4602 | ||
4603 | my @all; | |
4604 | @consts = map { $_ //= ''; s/%/%%/g; $_ } @consts; | |
4605 | my $fmt = join '%s', @consts; | |
4606 | push @all, $self->quoted_const_str($fmt); | |
4607 | ||
4608 | # the following is a stripped down copy of sub listop {} | |
4609 | my $parens = $assign || ($cx >= 5) || $self->{'parens'}; | |
4610 | my $fullname = $self->keyword('sprintf'); | |
4611 | push @all, map $self->deparse($_, 6), @kids; | |
4612 | ||
4613 | $rhs = $parens | |
4614 | ? "$fullname(" . join(", ", @all) . ")" | |
4615 | : "$fullname " . join(", ", @all); | |
4616 | } | |
4617 | else { | |
4618 | # "foo=" . $foo . " bar=" . $bar | |
4619 | my @all; | |
4620 | my $not_first; | |
4621 | while (@consts) { | |
4622 | push @all, $self->deparse(shift(@kids), 18) if $not_first; | |
4623 | $not_first = 1; | |
4624 | my $c = shift @consts; | |
4625 | if (defined $c) { | |
4626 | push @all, $self->quoted_const_str($c); | |
4627 | } | |
4628 | } | |
4629 | $rhs .= join ' . ', @all; | |
4630 | } | |
4631 | ||
4632 | my $text = $lhs . $rhs; | |
4633 | ||
4634 | $text = "($text)" if ($cx >= (($assign) ? 7 : 18+1)) | |
4635 | || $self->{'parens'}; | |
4636 | ||
4637 | return $text; | |
4638 | } | |
4639 | ||
4640 | ||
4641 | sub pp_multiconcat { | |
4642 | my $self = shift; | |
4643 | $self->do_multiconcat(@_, 0); | |
4644 | } | |
4645 | ||
4646 | ||
fedf30e1 DM |
4647 | sub pp_multideref { |
4648 | my $self = shift; | |
4649 | my($op, $cx) = @_; | |
4650 | my $text = ""; | |
4651 | ||
4652 | if ($op->private & OPpMULTIDEREF_EXISTS) { | |
4653 | $text = $self->keyword("exists"). " "; | |
4654 | } | |
4655 | elsif ($op->private & OPpMULTIDEREF_DELETE) { | |
4656 | $text = $self->keyword("delete"). " "; | |
4657 | } | |
4658 | elsif ($op->private & OPpLVAL_INTRO) { | |
4659 | $text = $self->keyword("local"). " "; | |
4660 | } | |
4661 | ||
4662 | if ($op->first && ($op->first->flags & OPf_KIDS)) { | |
4663 | # arbitrary initial expression, e.g. f(1,2,3)->[...] | |
29e6e3b9 DM |
4664 | my $expr = $self->deparse($op->first, 24); |
4665 | # stop "exists (expr)->{...}" being interpreted as | |
4666 | #"(exists (expr))->{...}" | |
4667 | $expr = "+$expr" if $expr =~ /^\(/; | |
4668 | $text .= $expr; | |
fedf30e1 DM |
4669 | } |
4670 | ||
4671 | my @items = $op->aux_list($self->{curcv}); | |
4672 | my $actions = shift @items; | |
4673 | ||
4674 | my $is_hash; | |
4675 | my $derefs = 0; | |
4676 | ||
4677 | while (1) { | |
4678 | if (($actions & MDEREF_ACTION_MASK) == MDEREF_reload) { | |
4679 | $actions = shift @items; | |
4680 | next; | |
4681 | } | |
4682 | ||
4683 | $is_hash = ( | |
4684 | ($actions & MDEREF_ACTION_MASK) == MDEREF_HV_pop_rv2hv_helem | |
4685 | || ($actions & MDEREF_ACTION_MASK) == MDEREF_HV_gvsv_vivify_rv2hv_helem | |
4686 | || ($actions & MDEREF_ACTION_MASK) == MDEREF_HV_padsv_vivify_rv2hv_helem | |
4687 | || ($actions & MDEREF_ACTION_MASK) == MDEREF_HV_vivify_rv2hv_helem | |
4688 | || ($actions & MDEREF_ACTION_MASK) == MDEREF_HV_padhv_helem | |
4689 | || ($actions & MDEREF_ACTION_MASK) == MDEREF_HV_gvhv_helem | |
4690 | ); | |
4691 | ||
4692 | if ( ($actions & MDEREF_ACTION_MASK) == MDEREF_AV_padav_aelem | |
4693 | || ($actions & MDEREF_ACTION_MASK) == MDEREF_HV_padhv_helem) | |
4694 | { | |
4695 | $derefs = 1; | |
4696 | $text .= '$' . substr($self->padname(shift @items), 1); | |
4697 | } | |
4698 | elsif ( ($actions & MDEREF_ACTION_MASK) == MDEREF_AV_gvav_aelem | |
4699 | || ($actions & MDEREF_ACTION_MASK) == MDEREF_HV_gvhv_helem) | |
4700 | { | |
4701 | $derefs = 1; | |
4702 | $text .= $self->multideref_var_name(shift @items, $is_hash); | |
4703 | } | |
4704 | else { | |
4705 | if ( ($actions & MDEREF_ACTION_MASK) == | |
4706 | MDEREF_AV_padsv_vivify_rv2av_aelem | |
4707 | || ($actions & MDEREF_ACTION_MASK) == | |
4708 | MDEREF_HV_padsv_vivify_rv2hv_helem) | |
4709 | { | |
4710 | $text .= $self->padname(shift @items); | |
4711 | } | |
4712 | elsif ( ($actions & MDEREF_ACTION_MASK) == | |
4713 | MDEREF_AV_gvsv_vivify_rv2av_aelem | |
4714 | || ($actions & MDEREF_ACTION_MASK) == | |
4715 | MDEREF_HV_gvsv_vivify_rv2hv_helem) | |
4716 | { | |
4717 | $text .= $self->multideref_var_name(shift @items, $is_hash); | |
4718 | } | |
4719 | elsif ( ($actions & MDEREF_ACTION_MASK) == | |
4720 | MDEREF_AV_pop_rv2av_aelem | |
4721 | || ($actions & MDEREF_ACTION_MASK) == | |
4722 | MDEREF_HV_pop_rv2hv_helem) | |
4723 | { | |
4724 | if ( ($op->flags & OPf_KIDS) | |
4725 | && ( _op_is_or_was($op->first, OP_RV2AV) | |
4726 | || _op_is_or_was($op->first, OP_RV2HV)) | |
4727 | && ($op->first->flags & OPf_KIDS) | |
4728 | && ( _op_is_or_was($op->first->first, OP_AELEM) | |
4729 | || _op_is_or_was($op->first->first, OP_HELEM)) | |
4730 | ) | |
4731 | { | |
4732 | $derefs++; | |
4733 | } | |
4734 | } | |
4735 | ||
4736 | $text .= '->' if !$derefs++; | |
4737 | } | |
4738 | ||
4739 | ||
4740 | if (($actions & MDEREF_INDEX_MASK) == MDEREF_INDEX_none) { | |
4741 | last; | |
4742 | } | |
4743 | ||
4744 | $text .= $is_hash ? '{' : '['; | |
4745 | ||
4746 | if (($actions & MDEREF_INDEX_MASK) == MDEREF_INDEX_const) { | |
4747 | my $key = shift @items; | |
4748 | if ($is_hash) { | |
4749 | $text .= $self->const($key, $cx); | |
4750 | } | |
4751 | else { | |
4752 | $text .= $key; | |
4753 | } | |
4754 | } | |
4755 | elsif (($actions & MDEREF_INDEX_MASK) == MDEREF_INDEX_padsv) { | |
4756 | $text .= $self->padname(shift @items); | |
4757 | } | |
4758 | elsif (($actions & MDEREF_INDEX_MASK) == MDEREF_INDEX_gvsv) { | |
4759 | $text .= '$' . ($self->stash_variable_name('$', shift @items))[0]; | |
4760 | } | |
4761 | ||
4762 | $text .= $is_hash ? '}' : ']'; | |
4763 | ||
4764 | if ($actions & MDEREF_FLAG_last) { | |
4765 | last; | |
4766 | } | |
4767 | $actions >>= MDEREF_SHIFT; | |
4768 | } | |
4769 | ||
4770 | return $text; | |
4771 | } | |
4772 | ||
4773 | ||
3f872cb9 GS |
4774 | sub pp_aelem { maybe_local(@_, elem(@_, "[", "]", "padav")) } |
4775 | sub pp_helem { maybe_local(@_, elem(@_, "{", "}", "padhv")) } | |
6e90668e SM |
4776 | |
4777 | sub pp_gelem { | |
4778 | my $self = shift; | |
9d2c6865 | 4779 | my($op, $cx) = @_; |
6e90668e SM |
4780 | my($glob, $part) = ($op->first, $op->last); |
4781 | $glob = $glob->first; # skip rv2gv | |
3f872cb9 | 4782 | $glob = $glob->first if $glob->name eq "rv2gv"; # this one's a bug |
9d2c6865 SM |
4783 | my $scope = is_scope($glob); |
4784 | $glob = $self->deparse($glob, 0); | |
4785 | $part = $self->deparse($part, 1); | |
dd666160 | 4786 | $glob =~ s/::\z// unless $scope; |
6e90668e SM |
4787 | return "*" . ($scope ? "{$glob}" : $glob) . "{$part}"; |
4788 | } | |
4789 | ||
4790 | sub slice { | |
4791 | my $self = shift; | |
9d2c6865 | 4792 | my ($op, $cx, $left, $right, $regname, $padname) = @_; |
6e90668e SM |
4793 | my $last; |
4794 | my(@elems, $kid, $array, $list); | |
4795 | if (class($op) eq "LISTOP") { | |
4796 | $last = $op->last; | |
4797 | } else { # ex-hslice inside delete() | |
4798 | for ($kid = $op->first; !null $kid->sibling; $kid = $kid->sibling) {} | |
4799 | $last = $kid; | |
4800 | } | |
4801 | $array = $last; | |
4802 | $array = $array->first | |
3f872cb9 | 4803 | if $array->name eq $regname or $array->name eq "null"; |
21b7468a | 4804 | $array = $self->elem_or_slice_array_name($array,$left,$padname,0); |
6e90668e | 4805 | $kid = $op->first->sibling; # skip pushmark |
3f872cb9 | 4806 | if ($kid->name eq "list") { |
6e90668e SM |
4807 | $kid = $kid->first->sibling; # skip list, pushmark |
4808 | for (; !null $kid; $kid = $kid->sibling) { | |
9d2c6865 | 4809 | push @elems, $self->deparse($kid, 6); |
6e90668e SM |
4810 | } |
4811 | $list = join(", ", @elems); | |
4812 | } else { | |
21b7468a | 4813 | $list = $self->elem_or_slice_single_index($kid); |
6e90668e | 4814 | } |
ac1e5644 DM |
4815 | my $lead = ( _op_is_or_was($op, OP_KVHSLICE) |
4816 | || _op_is_or_was($op, OP_KVASLICE)) | |
4817 | ? '%' : '@'; | |
5cae3edb | 4818 | return $lead . $array . $left . $list . $right; |
6e90668e SM |
4819 | } |
4820 | ||
5cae3edb | 4821 | sub pp_aslice { maybe_local(@_, slice(@_, "[", "]", "rv2av", "padav")) } |
6dd3e0f2 | 4822 | sub pp_kvaslice { slice(@_, "[", "]", "rv2av", "padav") } |
5cae3edb RZ |
4823 | sub pp_hslice { maybe_local(@_, slice(@_, "{", "}", "rv2hv", "padhv")) } |
4824 | sub pp_kvhslice { slice(@_, "{", "}", "rv2hv", "padhv") } | |
6e90668e SM |
4825 | |
4826 | sub pp_lslice { | |
4827 | my $self = shift; | |
9d2c6865 | 4828 | my($op, $cx) = @_; |
6e90668e SM |
4829 | my $idx = $op->first; |
4830 | my $list = $op->last; | |
4831 | my(@elems, $kid); | |
9d2c6865 SM |
4832 | $list = $self->deparse($list, 1); |
4833 | $idx = $self->deparse($idx, 1); | |
4834 | return "($list)" . "[$idx]"; | |
6e90668e SM |
4835 | } |
4836 | ||
6e90668e SM |
4837 | sub want_scalar { |
4838 | my $op = shift; | |
4839 | return ($op->flags & OPf_WANT) == OPf_WANT_SCALAR; | |
4840 | } | |
4841 | ||
bd0865ec GS |
4842 | sub want_list { |
4843 | my $op = shift; | |
4844 | return ($op->flags & OPf_WANT) == OPf_WANT_LIST; | |
4845 | } | |
4846 | ||
09d856fb | 4847 | sub _method { |
6e90668e | 4848 | my $self = shift; |
9d2c6865 | 4849 | my($op, $cx) = @_; |
bd0865ec GS |
4850 | my $kid = $op->first->sibling; # skip pushmark |
4851 | my($meth, $obj, @exprs); | |
3f872cb9 | 4852 | if ($kid->name eq "list" and want_list $kid) { |
bd0865ec GS |
4853 | # When an indirect object isn't a bareword but the args are in |
4854 | # parens, the parens aren't part of the method syntax (the LLAFR | |
4855 | # doesn't apply), but they make a list with OPf_PARENS set that | |
4856 | # doesn't get flattened by the append_elem that adds the method, | |
4857 | # making a (object, arg1, arg2, ...) list where the object | |
d989cdac | 4858 | # usually is. This can be distinguished from |
e38ccfd9 | 4859 | # '($obj, $arg1, $arg2)->meth()' (which is legal if $arg2 is an |
bd0865ec GS |
4860 | # object) because in the later the list is in scalar context |
4861 | # as the left side of -> always is, while in the former | |
4862 | # the list is in list context as method arguments always are. | |
4863 | # (Good thing there aren't method prototypes!) | |
3ed82cfc | 4864 | $meth = $kid->sibling; |
bd0865ec GS |
4865 | $kid = $kid->first->sibling; # skip pushmark |
4866 | $obj = $kid; | |
6e90668e | 4867 | $kid = $kid->sibling; |
bd0865ec | 4868 | for (; not null $kid; $kid = $kid->sibling) { |
09d856fb | 4869 | push @exprs, $kid; |
6e90668e | 4870 | } |
bd0865ec GS |
4871 | } else { |
4872 | $obj = $kid; | |
4873 | $kid = $kid->sibling; | |
35a99a08 | 4874 | for (; !null ($kid->sibling) && $kid->name!~/^method(?:_named)?\z/; |
90c0eb26 | 4875 | $kid = $kid->sibling) { |
09d856fb | 4876 | push @exprs, $kid |
6e90668e | 4877 | } |
3ed82cfc | 4878 | $meth = $kid; |
bd0865ec | 4879 | } |
09d856fb | 4880 | |
3ed82cfc | 4881 | if ($meth->name eq "method_named") { |
b46e009d | 4882 | $meth = $self->meth_sv($meth)->PV; |
7d6c333c | 4883 | } elsif ($meth->name eq "method_super") { |
4884 | $meth = "SUPER::".$self->meth_sv($meth)->PV; | |
810bd8b7 | 4885 | } elsif ($meth->name eq "method_redir") { |
4886 | $meth = $self->meth_rclass_sv($meth)->PV.'::'.$self->meth_sv($meth)->PV; | |
4887 | } elsif ($meth->name eq "method_redir_super") { | |
4888 | $meth = $self->meth_rclass_sv($meth)->PV.'::SUPER::'. | |
4889 | $self->meth_sv($meth)->PV; | |
bd0865ec | 4890 | } else { |
3ed82cfc GS |
4891 | $meth = $meth->first; |
4892 | if ($meth->name eq "const") { | |
4893 | # As of 5.005_58, this case is probably obsoleted by the | |
4894 | # method_named case above | |
18228111 | 4895 | $meth = $self->const_sv($meth)->PV; # needs to be bare |
3ed82cfc | 4896 | } |
bd0865ec | 4897 | } |
09d856fb CK |
4898 | |
4899 | return { method => $meth, variable_method => ref($meth), | |
1bf8bbb0 FC |
4900 | object => $obj, args => \@exprs }, |
4901 | $cx; | |
09d856fb CK |
4902 | } |
4903 | ||
4904 | # compat function only | |
4905 | sub method { | |
4906 | my $self = shift; | |
4907 | my $info = $self->_method(@_); | |
4908 | return $self->e_method( $self->_method(@_) ); | |
4909 | } | |
4910 | ||
4911 | sub e_method { | |
1bf8bbb0 | 4912 | my ($self, $info, $cx) = @_; |
09d856fb CK |
4913 | my $obj = $self->deparse($info->{object}, 24); |
4914 | ||
4915 | my $meth = $info->{method}; | |
4916 | $meth = $self->deparse($meth, 1) if $info->{variable_method}; | |
4917 | my $args = join(", ", map { $self->deparse($_, 6) } @{$info->{args}} ); | |
1bf8bbb0 FC |
4918 | if ($info->{object}->name eq 'scope' && want_list $info->{object}) { |
4919 | # method { $object } | |
4920 | # This must be deparsed this way to preserve list context | |
4921 | # of $object. | |
4922 | my $need_paren = $cx >= 6; | |
4923 | return '(' x $need_paren | |
4924 | . $meth . substr($obj,2) # chop off the "do" | |
4925 | . " $args" | |
4926 | . ')' x $need_paren; | |
4927 | } | |
09d856fb | 4928 | my $kid = $obj . "->" . $meth; |
145eb477 | 4929 | if (length $args) { |
bd0865ec GS |
4930 | return $kid . "(" . $args . ")"; # parens mandatory |
4931 | } else { | |
4932 | return $kid; | |
4933 | } | |
4934 | } | |
4935 | ||
4936 | # returns "&" if the prototype doesn't match the args, | |
4937 | # or ("", $args_after_prototype_demunging) if it does. | |
4938 | sub check_proto { | |
4939 | my $self = shift; | |
acaaef34 | 4940 | return "&" if $self->{'noproto'}; |
bd0865ec GS |
4941 | my($proto, @args) = @_; |
4942 | my($arg, $real); | |
4943 | my $doneok = 0; | |
4944 | my @reals; | |
4945 | # An unbackslashed @ or % gobbles up the rest of the args | |
2ae48fff | 4946 | 1 while $proto =~ s/(?<!\\)([@%])[^\]]+$/$1/; |
c4cf781e | 4947 | $proto =~ s/^\s*//; |
bd0865ec | 4948 | while ($proto) { |
fd8be4a1 | 4949 | $proto =~ s/^(\\?[\$\@&%*_]|\\\[[\$\@&%*]+\]|;|)\s*//; |
bd0865ec GS |
4950 | my $chr = $1; |
4951 | if ($chr eq "") { | |
4952 | return "&" if @args; | |
4953 | } elsif ($chr eq ";") { | |
4954 | $doneok = 1; | |
4955 | } elsif ($chr eq "@" or $chr eq "%") { | |
4956 | push @reals, map($self->deparse($_, 6), @args); | |
4957 | @args = (); | |
6e90668e | 4958 | } else { |
bd0865ec GS |
4959 | $arg = shift @args; |
4960 | last unless $arg; | |
21b52158 | 4961 | if ($chr eq "\$" || $chr eq "_") { |
bd0865ec GS |
4962 | if (want_scalar $arg) { |
4963 | push @reals, $self->deparse($arg, 6); | |
4964 | } else { | |
4965 | return "&"; | |
4966 | } | |
4967 | } elsif ($chr eq "&") { | |
3f872cb9 | 4968 | if ($arg->name =~ /^(s?refgen|undef)$/) { |
bd0865ec GS |
4969 | push @reals, $self->deparse($arg, 6); |
4970 | } else { | |
4971 | return "&"; | |
4972 | } | |
4973 | } elsif ($chr eq "*") { | |
3f872cb9 GS |
4974 | if ($arg->name =~ /^s?refgen$/ |
4975 | and $arg->first->first->name eq "rv2gv") | |
bd0865ec GS |
4976 | { |
4977 | $real = $arg->first->first; # skip refgen, null | |
3f872cb9 | 4978 | if ($real->first->name eq "gv") { |
bd0865ec GS |
4979 | push @reals, $self->deparse($real, 6); |
4980 | } else { | |
4981 | push @reals, $self->deparse($real->first, 6); | |
4982 | } | |
4983 | } else { | |
4984 | return "&"; | |
4985 | } | |
4986 | } elsif (substr($chr, 0, 1) eq "\\") { | |
2ae48fff | 4987 | $chr =~ tr/\\[]//d; |
3f872cb9 | 4988 | if ($arg->name =~ /^s?refgen$/ and |
bd0865ec | 4989 | !null($real = $arg->first) and |
2ae48fff RGS |
4990 | ($chr =~ /\$/ && is_scalar($real->first) |
4991 | or ($chr =~ /@/ | |
4992 | && class($real->first->sibling) ne 'NULL' | |
3f872cb9 GS |
4993 | && $real->first->sibling->name |
4994 | =~ /^(rv2|pad)av$/) | |
2ae48fff RGS |
4995 | or ($chr =~ /%/ |
4996 | && class($real->first->sibling) ne 'NULL' | |
3f872cb9 GS |
4997 | && $real->first->sibling->name |
4998 | =~ /^(rv2|pad)hv$/) | |
2ae48fff | 4999 | #or ($chr =~ /&/ # This doesn't work |
3f872cb9 | 5000 | # && $real->first->name eq "rv2cv") |
2ae48fff | 5001 | or ($chr =~ /\*/ |
3f872cb9 | 5002 | && $real->first->name eq "rv2gv"))) |
bd0865ec GS |
5003 | { |
5004 | push @reals, $self->deparse($real, 6); | |
5005 | } else { | |
5006 | return "&"; | |
5007 | } | |
5008 | } | |
5009 | } | |
9d2c6865 | 5010 | } |
e38ccfd9 | 5011 | return "&" if $proto and !$doneok; # too few args and no ';' |
bd0865ec GS |
5012 | return "&" if @args; # too many args |
5013 | return ("", join ", ", @reals); | |
5014 | } | |
5015 | ||
c65b7c4d FC |
5016 | sub retscalar { |
5017 | my $name = $_[0]->name; | |
5018 | # XXX There has to be a better way of doing this scalar-op check. | |
5019 | # Currently PL_opargs is not exposed. | |
5020 | if ($name eq 'null') { | |
5021 | $name = substr B::ppname($_[0]->targ), 3 | |
5022 | } | |
5023 | $name =~ /^(?:scalar|pushmark|wantarray|const|gvsv|gv|padsv|rv2gv | |
5024 | |rv2sv|av2arylen|anoncode|prototype|srefgen|ref|bless | |
5025 | |regcmaybe|regcreset|regcomp|qr|subst|substcont|trans | |
5026 | |transr|sassign|chop|schop|chomp|schomp|defined|undef | |
5027 | |study|pos|preinc|i_preinc|predec|i_predec|postinc | |
5028 | |i_postinc|postdec|i_postdec|pow|multiply|i_multiply | |
5029 | |divide|i_divide|modulo|i_modulo|add|i_add|subtract | |
e839e6ed | 5030 | |i_subtract|concat|multiconcat|stringify|left_shift|right_shift|lt |
c65b7c4d | 5031 | |i_lt|gt|i_gt|le|i_le|ge|i_ge|eq|i_eq|ne|i_ne|ncmp|i_ncmp |
27f31adf FC |
5032 | |slt|sgt|sle|sge|seq|sne|scmp|[sn]?bit_(?:and|x?or)|negate |
5033 | |i_negate|not|[sn]?complement|smartmatch|atan2|sin|cos | |
c65b7c4d FC |
5034 | |rand|srand|exp|log|sqrt|int|hex|oct|abs|length|substr |
5035 | |vec|index|rindex|sprintf|formline|ord|chr|crypt|ucfirst | |
5036 | |lcfirst|uc|lc|quotemeta|aelemfast|aelem|exists|helem | |
5037 | |pack|join|anonlist|anonhash|push|pop|shift|unshift|xor | |
5038 | |andassign|orassign|dorassign|warn|die|reset|nextstate | |
5039 | |dbstate|unstack|last|next|redo|dump|goto|exit|open|close | |
5040 | |pipe_op|fileno|umask|binmode|tie|untie|tied|dbmopen | |
5041 | |dbmclose|select|getc|read|enterwrite|prtf|print|say | |
5042 | |sysopen|sysseek|sysread|syswrite|eof|tell|seek|truncate | |
5043 | |fcntl|ioctl|flock|send|recv|socket|sockpair|bind|connect | |
5044 | |listen|accept|shutdown|gsockopt|ssockopt|getsockname | |
5045 | |getpeername|ftrread|ftrwrite|ftrexec|fteread|ftewrite | |
5046 | |fteexec|ftis|ftsize|ftmtime|ftatime|ftctime|ftrowned | |
5047 | |fteowned|ftzero|ftsock|ftchr|ftblk|ftfile|ftdir|ftpipe | |
5048 | |ftsuid|ftsgid|ftsvtx|ftlink|fttty|fttext|ftbinary|chdir | |
5049 | |chown|chroot|unlink|chmod|utime|rename|link|symlink | |
5050 | |readlink|mkdir|rmdir|open_dir|telldir|seekdir|rewinddir | |
5051 | |closedir|fork|wait|waitpid|system|exec|kill|getppid | |
5052 | |getpgrp|setpgrp|getpriority|setpriority|time|alarm|sleep | |
5053 | |shmget|shmctl|shmread|shmwrite|msgget|msgctl|msgsnd | |
5054 | |msgrcv|semop|semget|semctl|hintseval|shostent|snetent | |
5055 | |sprotoent|sservent|ehostent|enetent|eprotoent|eservent | |
5056 | |spwent|epwent|sgrent|egrent|getlogin|syscall|lock|runcv | |
5057 | |fc)\z/x | |
5058 | } | |
5059 | ||
bd0865ec GS |
5060 | sub pp_entersub { |
5061 | my $self = shift; | |
5062 | my($op, $cx) = @_; | |
09d856fb CK |
5063 | return $self->e_method($self->_method($op, $cx)) |
5064 | unless null $op->first->sibling; | |
bd0865ec GS |
5065 | my $prefix = ""; |
5066 | my $amper = ""; | |
5067 | my($kid, @exprs); | |
90c0eb26 | 5068 | if ($op->flags & OPf_SPECIAL && !($op->flags & OPf_MOD)) { |
9d2c6865 SM |
5069 | $prefix = "do "; |
5070 | } elsif ($op->private & OPpENTERSUB_AMPER) { | |
5071 | $amper = "&"; | |
5072 | } | |
5073 | $kid = $op->first; | |
5074 | $kid = $kid->first->sibling; # skip ex-list, pushmark | |
5075 | for (; not null $kid->sibling; $kid = $kid->sibling) { | |
5076 | push @exprs, $kid; | |
5077 | } | |
bd0865ec GS |
5078 | my $simple = 0; |
5079 | my $proto = undef; | |
bb9bfaa4 | 5080 | my $lexical; |
9d2c6865 SM |
5081 | if (is_scope($kid)) { |
5082 | $amper = "&"; | |
5083 | $kid = "{" . $self->deparse($kid, 0) . "}"; | |
3f872cb9 | 5084 | } elsif ($kid->first->name eq "gv") { |
6f611a1a | 5085 | my $gv = $self->gv_or_padgv($kid->first); |
32cc5cd1 FC |
5086 | my $cv; |
5087 | if (class($gv) eq 'GV' && class($cv = $gv->CV) ne "SPECIAL" | |
5088 | || $gv->FLAGS & SVf_ROK && class($cv = $gv->RV) eq 'CV') { | |
5089 | $proto = $cv->PV if $cv->FLAGS & SVf_POK; | |
9d2c6865 | 5090 | } |
bd0865ec | 5091 | $simple = 1; # only calls of named functions can be prototyped |
257296eb | 5092 | $kid = $self->maybe_qualify("!", $self->gv_name($gv)); |
d49c3562 FC |
5093 | my $fq; |
5094 | # Fully qualify any sub name that conflicts with a lexical. | |
5095 | if ($self->lex_in_scope("&$kid") | |
5096 | || $self->lex_in_scope("&$kid", 1)) | |
5097 | { | |
5098 | $fq++; | |
5099 | } elsif (!$amper) { | |
8b2d6640 FC |
5100 | if ($kid eq 'main::') { |
5101 | $kid = '::'; | |
a958cfbb FC |
5102 | } |
5103 | else { | |
5104 | if ($kid !~ /::/ && $kid ne 'x') { | |
5105 | # Fully qualify any sub name that is also a keyword. While | |
5106 | # we could check the import flag, we cannot guarantee that | |
5107 | # the code deparsed so far would set that flag, so we qual- | |
5108 | # ify the names regardless of importation. | |
a958cfbb FC |
5109 | if (exists $feature_keywords{$kid}) { |
5110 | $fq++ if $self->feature_enabled($kid); | |
e54915d6 FC |
5111 | } elsif (do { local $@; local $SIG{__DIE__}; |
5112 | eval { () = prototype "CORE::$kid"; 1 } }) { | |
a958cfbb FC |
5113 | $fq++ |
5114 | } | |
a958cfbb FC |
5115 | } |
5116 | if ($kid !~ /^(?:\w|::)(?:[\w\d]|::(?!\z))*\z/) { | |
7741ceed | 5117 | $kid = single_delim("q", "'", $kid, $self) . '->'; |
a958cfbb | 5118 | } |
8b2d6640 FC |
5119 | } |
5120 | } | |
d49c3562 | 5121 | $fq and substr $kid, 0, 0, = $self->{'curstash'}.'::'; |
90c0eb26 | 5122 | } elsif (is_scalar ($kid->first) && $kid->first->name ne 'rv2cv') { |
9d2c6865 SM |
5123 | $amper = "&"; |
5124 | $kid = $self->deparse($kid, 24); | |
5125 | } else { | |
5126 | $prefix = ""; | |
bb9bfaa4 FC |
5127 | my $grandkid = $kid->first; |
5128 | my $arrow = ($lexical = $grandkid->name eq "padcv") | |
5129 | || is_subscriptable($grandkid) | |
5130 | ? "" | |
5131 | : "->"; | |
3ed82cfc | 5132 | $kid = $self->deparse($kid, 24) . $arrow; |
bb9bfaa4 FC |
5133 | if ($lexical) { |
5134 | my $padlist = $self->{'curcv'}->PADLIST; | |
5135 | my $padoff = $grandkid->targ; | |
5136 | my $padname = $padlist->ARRAYelt(0)->ARRAYelt($padoff); | |
5137 | my $protocv = $padname->FLAGS & SVpad_STATE | |
5138 | ? $padlist->ARRAYelt(1)->ARRAYelt($padoff) | |
5139 | : $padname->PROTOCV; | |
5140 | if ($protocv->FLAGS & SVf_POK) { | |
5141 | $proto = $protocv->PV | |
5142 | } | |
5143 | $simple = 1; | |
5144 | } | |
9d2c6865 | 5145 | } |
0ca62a8e RH |
5146 | |
5147 | # Doesn't matter how many prototypes there are, if | |
5148 | # they haven't happened yet! | |
bb9bfaa4 | 5149 | my $declared = $lexical || exists $self->{'subs_declared'}{$kid}; |
de4fa237 FC |
5150 | if (not $declared and $self->{'in_coderef2text'}) { |
5151 | no strict 'refs'; | |
5152 | no warnings 'uninitialized'; | |
5153 | $declared = | |
5154 | ( | |
5155 | defined &{ ${$self->{'curstash'}."::"}{$kid} } | |
5156 | && !exists | |
5157 | $self->{'subs_deparsed'}{$self->{'curstash'}."::".$kid} | |
5158 | && defined prototype $self->{'curstash'}."::".$kid | |
5159 | ); | |
5160 | } | |
f2279a62 FC |
5161 | if (!$declared && defined($proto)) { |
5162 | # Avoid "too early to check prototype" warning | |
5163 | ($amper, $proto) = ('&'); | |
e99ebc55 | 5164 | } |
0ca62a8e | 5165 | |
bd0865ec | 5166 | my $args; |
e16ceb94 | 5167 | my $listargs = 1; |
0ca62a8e | 5168 | if ($declared and defined $proto and not $amper) { |
bd0865ec | 5169 | ($amper, $args) = $self->check_proto($proto, @exprs); |
e16ceb94 FC |
5170 | $listargs = $amper; |
5171 | } | |
5172 | if ($listargs) { | |
c65b7c4d FC |
5173 | $args = join(", ", map( |
5174 | ($_->flags & OPf_WANT) == OPf_WANT_SCALAR | |
5175 | && !retscalar($_) | |
5176 | ? $self->maybe_parens_unop('scalar', $_, 6) | |
5177 | : $self->deparse($_, 6), | |
5178 | @exprs | |
5179 | )); | |
6e90668e | 5180 | } |
9d2c6865 | 5181 | if ($prefix or $amper) { |
1b38d782 | 5182 | if ($kid eq '&') { $kid = "{$kid}" } # &{&} cannot be written as && |
9d2c6865 SM |
5183 | if ($op->flags & OPf_STACKED) { |
5184 | return $prefix . $amper . $kid . "(" . $args . ")"; | |
5185 | } else { | |
5186 | return $prefix . $amper. $kid; | |
5187 | } | |
6e90668e | 5188 | } else { |
7969d523 | 5189 | # It's a syntax error to call CORE::GLOBAL::foo with a prefix, |
34a48b4b RH |
5190 | # so it must have been translated from a keyword call. Translate |
5191 | # it back. | |
5192 | $kid =~ s/^CORE::GLOBAL:://; | |
5193 | ||
d989cdac | 5194 | my $dproto = defined($proto) ? $proto : "undefined"; |
fd8be4a1 | 5195 | my $scalar_proto = $dproto =~ /^;*(?:[\$*_+]|\\.|\\\[[^]]\])\z/; |
0ca62a8e RH |
5196 | if (!$declared) { |
5197 | return "$kid(" . $args . ")"; | |
c4cf781e | 5198 | } elsif ($dproto =~ /^\s*\z/) { |
9d2c6865 | 5199 | return $kid; |
fd8be4a1 | 5200 | } elsif ($scalar_proto and is_scalar($exprs[0])) { |
d989cdac SM |
5201 | # is_scalar is an excessively conservative test here: |
5202 | # really, we should be comparing to the precedence of the | |
5203 | # top operator of $exprs[0] (ala unop()), but that would | |
5204 | # take some major code restructuring to do right. | |
9d2c6865 | 5205 | return $self->maybe_parens_func($kid, $args, $cx, 16); |
fd8be4a1 | 5206 | } elsif (not $scalar_proto and defined($proto) || $simple) { #' |
9d2c6865 SM |
5207 | return $self->maybe_parens_func($kid, $args, $cx, 5); |
5208 | } else { | |
5209 | return "$kid(" . $args . ")"; | |
5210 | } | |
6e90668e SM |
5211 | } |
5212 | } | |
5213 | ||
5214 | sub pp_enterwrite { unop(@_, "write") } | |
5215 | ||
5216 | # escape things that cause interpolation in double quotes, | |
5217 | # but not character escapes | |
5218 | sub uninterp { | |
5219 | my($str) = @_; | |
3f766ba3 | 5220 | $str =~ s/(^|\G|[^\\])((?:\\\\)*)([\$\@]|\\[uUlLQE])/$1$2\\$3/g; |
9d2c6865 SM |
5221 | return $str; |
5222 | } | |
5223 | ||
b7dad2dc RH |
5224 | { |
5225 | my $bal; | |
5226 | BEGIN { | |
cdf8218f RH |
5227 | use re "eval"; |
5228 | # Matches any string which is balanced with respect to {braces} | |
b7dad2dc | 5229 | $bal = qr( |
cdf8218f RH |
5230 | (?: |
5231 | [^\\{}] | |
5232 | | \\\\ | |
5233 | | \\[{}] | |
5234 | | \{(??{$bal})\} | |
5235 | )* | |
5236 | )x; | |
b7dad2dc RH |
5237 | } |
5238 | ||
5239 | # the same, but treat $|, $), $( and $ at the end of the string differently | |
ba0372a0 | 5240 | # and leave comments unmangled for the sake of /x and (?x). |
b7dad2dc RH |
5241 | sub re_uninterp { |
5242 | my($str) = @_; | |
cdf8218f RH |
5243 | |
5244 | $str =~ s/ | |
5245 | ( ^|\G # $1 | |
5246 | | [^\\] | |
5247 | ) | |
5248 | ||
5249 | ( # $2 | |
5250 | (?:\\\\)* | |
5251 | ) | |
5252 | ||
5253 | ( # $3 | |
b7dad2dc RH |
5254 | ( \(\?\??\{$bal\}\) # $4 (skip over (?{}) and (??{}) blocks) |
5255 | | \#[^\n]* # (skip over comments) | |
5256 | ) | |
5257 | | [\$\@] | |
9a58b761 | 5258 | (?!\||\)|\(|$|\s) |
b7dad2dc RH |
5259 | | \\[uUlLQE] |
5260 | ) | |
5261 | ||
c7de4c66 | 5262 | /defined($4) && length($4) ? "$1$2$4" : "$1$2\\$3"/xeg; |
b7dad2dc | 5263 | |
a9760014 RH |
5264 | return $str; |
5265 | } | |
b7dad2dc | 5266 | } |
a9760014 | 5267 | |
6e90668e | 5268 | # character escapes, but not delimiters that might need to be escaped |
746698c5 | 5269 | sub escape_str { # ASCII, UTF8 |
6e90668e | 5270 | my($str) = @_; |
cef22867 | 5271 | $str =~ s/(.)/ord($1) > 255 ? sprintf("\\x{%x}", ord($1)) : $1/eg; |
6e90668e | 5272 | $str =~ s/\a/\\a/g; |
78425176 KW |
5273 | # $str =~ s/\cH/\\b/g; # \b means something different in a regex; and \cH |
5274 | # isn't a backspace in EBCDIC | |
6e90668e SM |
5275 | $str =~ s/\t/\\t/g; |
5276 | $str =~ s/\n/\\n/g; | |
5277 | $str =~ s/\e/\\e/g; | |
5278 | $str =~ s/\f/\\f/g; | |
5279 | $str =~ s/\r/\\r/g; | |
dd405ed7 | 5280 | $str =~ s/([\cA-\cZ])/'\\c' . $unctrl{$1}/ge; |
2d5b99ed | 5281 | $str =~ s/([[:^print:]])/sprintf("\\%03o", ord($1))/age; |
6e90668e SM |
5282 | return $str; |
5283 | } | |
5284 | ||
ba0372a0 FC |
5285 | # For regexes. Leave whitespace unmangled in case of /x or (?x). |
5286 | sub escape_re { | |
a9760014 | 5287 | my($str) = @_; |
cef22867 | 5288 | $str =~ s/(.)/ord($1) > 255 ? sprintf("\\x{%x}", ord($1)) : $1/eg; |
aee8fd8d | 5289 | $str =~ s/([[:^print:]])/ |
2d5b99ed | 5290 | ($1 =~ y! \t\n!!) ? $1 : sprintf("\\%03o", ord($1))/age; |
a9760014 RH |
5291 | $str =~ s/\n/\n\f/g; |
5292 | return $str; | |
5293 | } | |
5294 | ||
9d2c6865 SM |
5295 | # Don't do this for regexen |
5296 | sub unback { | |
5297 | my($str) = @_; | |
5298 | $str =~ s/\\/\\\\/g; | |
5299 | return $str; | |
5300 | } | |
5301 | ||
08c6f5ec RH |
5302 | # Remove backslashes which precede literal control characters, |
5303 | # to avoid creating ambiguity when we escape the latter. | |
4d7ac81a DM |
5304 | # |
5305 | # Don't remove a backslash from escaped whitespace: where the T represents | |
5306 | # a literal tab character, /T/x is not equivalent to /\T/x | |
5307 | ||
08c6f5ec RH |
5308 | sub re_unback { |
5309 | my($str) = @_; | |
5310 | ||
5311 | # the insane complexity here is due to the behaviour of "\c\" | |
27daf566 DM |
5312 | $str =~ s/ |
5313 | # these two lines ensure that the backslash we're about to | |
5ab5717f | 5314 | # remove isn't preceded by something which makes it part |
27daf566 DM |
5315 | # of a \c |
5316 | ||
5317 | (^ | [^\\] | \\c\\) # $1 | |
5318 | (?<!\\c) | |
5319 | ||
5320 | # the backslash to remove | |
5321 | \\ | |
5322 | ||
5323 | # keep pairs of backslashes | |
5324 | (\\\\)* # $2 | |
5325 | ||
5326 | # only remove if the thing following is a control char | |
5327 | (?=[[:^print:]]) | |
4d7ac81a DM |
5328 | # and not whitespace |
5329 | (?=\S) | |
27daf566 | 5330 | /$1$2/xg; |
08c6f5ec RH |
5331 | return $str; |
5332 | } | |
5333 | ||
6e90668e SM |
5334 | sub balanced_delim { |
5335 | my($str) = @_; | |
5336 | my @str = split //, $str; | |
80b7d6d2 | 5337 | my($ar, $open, $close, $fail, $c, $cnt, $last_bs); |
6e90668e SM |
5338 | for $ar (['[',']'], ['(',')'], ['<','>'], ['{','}']) { |
5339 | ($open, $close) = @$ar; | |
80b7d6d2 | 5340 | $fail = 0; $cnt = 0; $last_bs = 0; |
6e90668e SM |
5341 | for $c (@str) { |
5342 | if ($c eq $open) { | |
80b7d6d2 | 5343 | $fail = 1 if $last_bs; |
6e90668e SM |
5344 | $cnt++; |
5345 | } elsif ($c eq $close) { | |
80b7d6d2 | 5346 | $fail = 1 if $last_bs; |
6e90668e SM |
5347 | $cnt--; |
5348 | if ($cnt < 0) { | |
bd0865ec | 5349 | # qq()() isn't ")(" |
6e90668e SM |
5350 | $fail = 1; |
5351 | last; | |
5352 | } | |
5353 | } | |
80b7d6d2 | 5354 | $last_bs = $c eq '\\'; |
6e90668e SM |
5355 | } |
5356 | $fail = 1 if $cnt != 0; | |
5357 | return ($open, "$open$str$close") if not $fail; | |
5358 | } | |
5359 | return ("", $str); | |
5360 | } | |
5361 | ||
5362 | sub single_delim { | |
7741ceed | 5363 | my($q, $default, $str, $self) = @_; |
90be192f | 5364 | return "$default$str$default" if $default and index($str, $default) == -1; |
7741ceed | 5365 | my $coreq = $self->keyword($q); # maybe CORE::q |
8347ad86 RGS |
5366 | if ($q ne 'qr') { |
5367 | (my $succeed, $str) = balanced_delim($str); | |
7741ceed | 5368 | return "$coreq$str" if $succeed; |
8347ad86 RGS |
5369 | } |
5370 | for my $delim ('/', '"', '#') { | |
7741ceed | 5371 | return "$coreq$delim" . $str . $delim if index($str, $delim) == -1; |
6e90668e | 5372 | } |
90be192f SM |
5373 | if ($default) { |
5374 | $str =~ s/$default/\\$default/g; | |
5375 | return "$default$str$default"; | |
5376 | } else { | |
5377 | $str =~ s[/][\\/]g; | |
7741ceed | 5378 | return "$coreq/$str/"; |
90be192f | 5379 | } |
6e90668e SM |
5380 | } |
5381 | ||
d989cdac SM |
5382 | my $max_prec; |
5383 | BEGIN { $max_prec = int(0.999 + 8*length(pack("F", 42))*log(2)/log(10)); } | |
5384 | ||
5385 | # Split a floating point number into an integer mantissa and a binary | |
5386 | # exponent. Assumes you've already made sure the number isn't zero or | |
5387 | # some weird infinity or NaN. | |
5388 | sub split_float { | |
5389 | my($f) = @_; | |
5390 | my $exponent = 0; | |
5391 | if ($f == int($f)) { | |
5392 | while ($f % 2 == 0) { | |
5393 | $f /= 2; | |
5394 | $exponent++; | |
5395 | } | |
5396 | } else { | |
5397 | while ($f != int($f)) { | |
5398 | $f *= 2; | |
5399 | $exponent--; | |
5400 | } | |
5401 | } | |
5402 | my $mantissa = sprintf("%.0f", $f); | |
5403 | return ($mantissa, $exponent); | |
5404 | } | |
5405 | ||
e839e6ed DM |
5406 | |
5407 | # suitably single- or double-quote a literal constant string | |
5408 | ||
5409 | sub quoted_const_str { | |
5410 | my ($self, $str) =@_; | |
5411 | if ($str =~ /[[:^print:]]/a) { | |
5412 | return single_delim("qq", '"', | |
5413 | uninterp(escape_str unback $str), $self); | |
5414 | } else { | |
5415 | return single_delim("q", "'", unback($str), $self); | |
5416 | } | |
5417 | } | |
5418 | ||
5419 | ||
6e90668e | 5420 | sub const { |
d989cdac SM |
5421 | my $self = shift; |
5422 | my($sv, $cx) = @_; | |
5423 | if ($self->{'use_dumper'}) { | |
5424 | return $self->const_dumper($sv, $cx); | |
5425 | } | |
6e90668e | 5426 | if (class($sv) eq "SPECIAL") { |
d989cdac | 5427 | # sv_undef, sv_yes, sv_no |
ea36157c FC |
5428 | return $$sv == 3 ? $self->maybe_parens("!1", $cx, 21) |
5429 | : ('undef', '1')[$$sv-1]; | |
805b1011 DM |
5430 | } |
5431 | if (class($sv) eq "NULL") { | |
7a9b44b9 | 5432 | return 'undef'; |
805b1011 | 5433 | } |
127212b2 DM |
5434 | # convert a version object into the "v1.2.3" string in its V magic |
5435 | if ($sv->FLAGS & SVs_RMG) { | |
5436 | for (my $mg = $sv->MAGIC; $mg; $mg = $mg->MOREMAGIC) { | |
5437 | return $mg->PTR if $mg->TYPE eq 'V'; | |
5438 | } | |
5439 | } | |
5440 | ||
5441 | if ($sv->FLAGS & SVf_IOK) { | |
d989cdac SM |
5442 | my $str = $sv->int_value; |
5443 | $str = $self->maybe_parens($str, $cx, 21) if $str < 0; | |
5444 | return $str; | |
6e90668e | 5445 | } elsif ($sv->FLAGS & SVf_NOK) { |
d989cdac SM |
5446 | my $nv = $sv->NV; |
5447 | if ($nv == 0) { | |
5448 | if (pack("F", $nv) eq pack("F", 0)) { | |
5449 | # positive zero | |
5450 | return "0"; | |
5451 | } else { | |
5452 | # negative zero | |
5453 | return $self->maybe_parens("-.0", $cx, 21); | |
5454 | } | |
5455 | } elsif (1/$nv == 0) { | |
5456 | if ($nv > 0) { | |
5457 | # positive infinity | |
5458 | return $self->maybe_parens("9**9**9", $cx, 22); | |
5459 | } else { | |
5460 | # negative infinity | |
5461 | return $self->maybe_parens("-9**9**9", $cx, 21); | |
5462 | } | |
5463 | } elsif ($nv != $nv) { | |
5464 | # NaN | |
5465 | if (pack("F", $nv) eq pack("F", sin(9**9**9))) { | |
5466 | # the normal kind | |
5467 | return "sin(9**9**9)"; | |
5468 | } elsif (pack("F", $nv) eq pack("F", -sin(9**9**9))) { | |
5469 | # the inverted kind | |
5470 | return $self->maybe_parens("-sin(9**9**9)", $cx, 21); | |
5471 | } else { | |
5472 | # some other kind | |
5473 | my $hex = unpack("h*", pack("F", $nv)); | |
5474 | return qq'unpack("F", pack("h*", "$hex"))'; | |
5475 | } | |
fecea806 | 5476 | } |
d989cdac SM |
5477 | # first, try the default stringification |
5478 | my $str = "$nv"; | |
5479 | if ($str != $nv) { | |
5480 | # failing that, try using more precision | |
5481 | $str = sprintf("%.${max_prec}g", $nv); | |
5482 | # if (pack("F", $str) ne pack("F", $nv)) { | |
5483 | if ($str != $nv) { | |
5484 | # not representable in decimal with whatever sprintf() | |
5485 | # and atof() Perl is using here. | |
5486 | my($mant, $exp) = split_float($nv); | |
5487 | return $self->maybe_parens("$mant * 2**$exp", $cx, 19); | |
5488 | } | |
5489 | } | |
5490 | $str = $self->maybe_parens($str, $cx, 21) if $nv < 0; | |
5491 | return $str; | |
7a9b44b9 | 5492 | } elsif ($sv->FLAGS & SVf_ROK && $sv->can("RV")) { |
d989cdac | 5493 | my $ref = $sv->RV; |
5e965771 FC |
5494 | my $class = class($ref); |
5495 | if ($class eq "AV") { | |
d989cdac | 5496 | return "[" . $self->list_const(2, $ref->ARRAY) . "]"; |
5e965771 | 5497 | } elsif ($class eq "HV") { |
d989cdac SM |
5498 | my %hash = $ref->ARRAY; |
5499 | my @elts; | |
5500 | for my $k (sort keys %hash) { | |
5501 | push @elts, "$k => " . $self->const($hash{$k}, 6); | |
5502 | } | |
5503 | return "{" . join(", ", @elts) . "}"; | |
5e965771 | 5504 | } elsif ($class eq "CV") { |
843835bc Z |
5505 | no overloading; |
5506 | if ($self->{curcv} && | |
1a35f9ff FC |
5507 | $self->{curcv}->object_2svref == $ref->object_2svref) { |
5508 | return $self->keyword("__SUB__"); | |
5509 | } | |
d989cdac SM |
5510 | return "sub " . $self->deparse_sub($ref); |
5511 | } | |
5e965771 | 5512 | if ($class ne 'SPECIAL' and $ref->FLAGS & SVs_SMG) { |
d989cdac SM |
5513 | for (my $mg = $ref->MAGIC; $mg; $mg = $mg->MOREMAGIC) { |
5514 | if ($mg->TYPE eq 'r') { | |
ba0372a0 | 5515 | my $re = re_uninterp(escape_re(re_unback($mg->precomp))); |
7741ceed | 5516 | return single_delim("qr", "", $re, $self); |
d989cdac SM |
5517 | } |
5518 | } | |
5519 | } | |
5520 | ||
9f125c4a FC |
5521 | my $const = $self->const($ref, 20); |
5522 | if ($self->{in_subst_repl} && $const =~ /^[0-9]/) { | |
5523 | $const = "($const)"; | |
5524 | } | |
5525 | return $self->maybe_parens("\\$const", $cx, 20); | |
34768ba5 | 5526 | } elsif ($sv->FLAGS & SVf_POK) { |
6e90668e | 5527 | my $str = $sv->PV; |
e839e6ed | 5528 | return $self->quoted_const_str($str); |
34768ba5 RH |
5529 | } else { |
5530 | return "undef"; | |
a798dbf2 MB |
5531 | } |
5532 | } | |
5533 | ||
d989cdac SM |
5534 | sub const_dumper { |
5535 | my $self = shift; | |
5536 | my($sv, $cx) = @_; | |
5537 | my $ref = $sv->object_2svref(); | |
5538 | my $dumper = Data::Dumper->new([$$ref], ['$v']); | |
5539 | $dumper->Purity(1)->Terse(1)->Deparse(1)->Indent(0)->Useqq(1)->Sortkeys(1); | |
5540 | my $str = $dumper->Dump(); | |
5541 | if ($str =~ /^\$v/) { | |
5542 | return '${my ' . $str . ' \$v}'; | |
5543 | } else { | |
5544 | return $str; | |
5545 | } | |
5546 | } | |
5547 | ||
18228111 GS |
5548 | sub const_sv { |
5549 | my $self = shift; | |
5550 | my $op = shift; | |
5551 | my $sv = $op->sv; | |
5552 | # the constant could be in the pad (under useithreads) | |
5553 | $sv = $self->padval($op->targ) unless $$sv; | |
5554 | return $sv; | |
5555 | } | |
5556 | ||
b46e009d | 5557 | sub meth_sv { |
5558 | my $self = shift; | |
5559 | my $op = shift; | |
5560 | my $sv = $op->meth_sv; | |
5561 | # the constant could be in the pad (under useithreads) | |
5562 | $sv = $self->padval($op->targ) unless $$sv; | |
5563 | return $sv; | |
5564 | } | |
5565 | ||
810bd8b7 | 5566 | sub meth_rclass_sv { |
5567 | my $self = shift; | |
5568 | my $op = shift; | |
5569 | my $sv = $op->rclass; | |
5570 | # the constant could be in the pad (under useithreads) | |
5571 | $sv = $self->padval($sv) unless ref $sv; | |
5572 | return $sv; | |
5573 | } | |
5574 | ||
6e90668e SM |
5575 | sub pp_const { |
5576 | my $self = shift; | |
9d2c6865 | 5577 | my($op, $cx) = @_; |
e38ccfd9 | 5578 | # if ($op->private & OPpCONST_BARE) { # trouble with '=>' autoquoting |
18228111 | 5579 | # return $self->const_sv($op)->PV; |
6e90668e | 5580 | # } |
18228111 | 5581 | my $sv = $self->const_sv($op); |
d989cdac | 5582 | return $self->const($sv, $cx); |
6e90668e SM |
5583 | } |
5584 | ||
e839e6ed DM |
5585 | |
5586 | # Join two components of a double-quoted string, disambiguating | |
5587 | # "${foo}bar", "${foo}{bar}", "${foo}[1]", "$foo\::bar" | |
5588 | ||
5589 | sub dq_disambiguate { | |
5590 | my ($first, $last) = @_; | |
5591 | ($last =~ /^[A-Z\\\^\[\]_?]/ && | |
5592 | $first =~ s/([\$@])\^$/${1}{^}/) # "${^}W" etc | |
5593 | || ($last =~ /^[:'{\[\w_]/ && #' | |
5594 | $first =~ s/([\$@])([A-Za-z_]\w*)$/${1}{$2}/); | |
5595 | return $first . $last; | |
5596 | } | |
5597 | ||
5598 | ||
5599 | # Deparse a double-quoted optree. For example, "$a[0]\Q$b\Efo\"o" gets | |
5600 | # compiled to concat(concat($[0],quotemeta($b)),const("fo\"o")), and this | |
5601 | # sub deparses it back to $a[0]\Q$b\Efo"o | |
5602 | # (It does not add delimiters) | |
5603 | ||
6e90668e SM |
5604 | sub dq { |
5605 | my $self = shift; | |
5606 | my $op = shift; | |
3f872cb9 GS |
5607 | my $type = $op->name; |
5608 | if ($type eq "const") { | |
f3402b25 | 5609 | return uninterp(escape_str(unback($self->const_sv($op)->as_string))); |
3f872cb9 | 5610 | } elsif ($type eq "concat") { |
e839e6ed DM |
5611 | return dq_disambiguate($self->dq($op->first), $self->dq($op->last)); |
5612 | } elsif ($type eq "multiconcat") { | |
5613 | return $self->do_multiconcat($op, 26, 1); | |
3f872cb9 | 5614 | } elsif ($type eq "uc") { |
6e90668e | 5615 | return '\U' . $self->dq($op->first->sibling) . '\E'; |
3f872cb9 | 5616 | } elsif ($type eq "lc") { |
6e90668e | 5617 | return '\L' . $self->dq($op->first->sibling) . '\E'; |
3f872cb9 | 5618 | } elsif ($type eq "ucfirst") { |
6e90668e | 5619 | return '\u' . $self->dq($op->first->sibling); |
3f872cb9 | 5620 | } elsif ($type eq "lcfirst") { |
6e90668e | 5621 | return '\l' . $self->dq($op->first->sibling); |
3f872cb9 | 5622 | } elsif ($type eq "quotemeta") { |
6e90668e | 5623 | return '\Q' . $self->dq($op->first->sibling) . '\E'; |
838f2281 BF |
5624 | } elsif ($type eq "fc") { |
5625 | return '\F' . $self->dq($op->first->sibling) . '\E'; | |
3f872cb9 | 5626 | } elsif ($type eq "join") { |
9d2c6865 | 5627 | return $self->deparse($op->last, 26); # was join($", @ary) |
a798dbf2 | 5628 | } else { |
9d2c6865 | 5629 | return $self->deparse($op, 26); |
6e90668e SM |
5630 | } |
5631 | } | |
5632 | ||
5633 | sub pp_backtick { | |
5634 | my $self = shift; | |
9d2c6865 | 5635 | my($op, $cx) = @_; |
85675c4c RGS |
5636 | # skip pushmark if it exists (readpipe() vs ``) |
5637 | my $child = $op->first->sibling->isa('B::NULL') | |
c53941b4 | 5638 | ? $op->first : $op->first->sibling; |
5d8c42c2 | 5639 | if ($self->pure_string($child)) { |
7741ceed | 5640 | return single_delim("qx", '`', $self->dq($child, 1), $self); |
5d8c42c2 FC |
5641 | } |
5642 | unop($self, @_, "readpipe"); | |
6e90668e SM |
5643 | } |
5644 | ||
5645 | sub dquote { | |
5646 | my $self = shift; | |
6f611a1a | 5647 | my($op, $cx) = @_; |
3ed82cfc GS |
5648 | my $kid = $op->first->sibling; # skip ex-stringify, pushmark |
5649 | return $self->deparse($kid, $cx) if $self->{'unquote'}; | |
5650 | $self->maybe_targmy($kid, $cx, | |
7741ceed FC |
5651 | sub {single_delim("qq", '"', $self->dq($_[1]), |
5652 | $self)}); | |
6e90668e SM |
5653 | } |
5654 | ||
bd0865ec | 5655 | # OP_STRINGIFY is a listop, but it only ever has one arg |
3b4e2a4d FC |
5656 | sub pp_stringify { |
5657 | my ($self, $op, $cx) = @_; | |
5658 | my $kid = $op->first->sibling; | |
5659 | while ($kid->name eq 'null' && !null($kid->first)) { | |
5660 | $kid = $kid->first; | |
5661 | } | |
fedf30e1 | 5662 | if ($kid->name =~ /^(?:const|padsv|rv2sv|av2arylen|gvsv|multideref |
3b4e2a4d FC |
5663 | |aelemfast(?:_lex)?|[ah]elem|join|concat)\z/x) { |
5664 | maybe_targmy(@_, \&dquote); | |
5665 | } | |
5666 | else { | |
5667 | # Actually an optimised join. | |
5668 | my $result = listop(@_,"join"); | |
5669 | $result =~ s/join([( ])/join$1$self->{'ex_const'}, /; | |
5670 | $result; | |
5671 | } | |
5672 | } | |
6e90668e SM |
5673 | |
5674 | # tr/// and s/// (and tr[][], tr[]//, tr###, etc) | |
5675 | # note that tr(from)/to/ is OK, but not tr/from/(to) | |
5676 | sub double_delim { | |
5677 | my($from, $to) = @_; | |
5678 | my($succeed, $delim); | |
5679 | if ($from !~ m[/] and $to !~ m[/]) { | |
5680 | return "/$from/$to/"; | |
5681 | } elsif (($succeed, $from) = balanced_delim($from) and $succeed) { | |
5682 | if (($succeed, $to) = balanced_delim($to) and $succeed) { | |
5683 | return "$from$to"; | |
5684 | } else { | |
6b0bcbb1 | 5685 | for $delim ('/', '"', '#') { # note no "'" -- s''' is special |
6e90668e SM |
5686 | return "$from$delim$to$delim" if index($to, $delim) == -1; |
5687 | } | |
5688 | $to =~ s[/][\\/]g; | |
5689 | return "$from/$to/"; | |
5690 | } | |
5691 | } else { | |
5692 | for $delim ('/', '"', '#') { # note no ' | |
5693 | return "$delim$from$delim$to$delim" | |
5694 | if index($to . $from, $delim) == -1; | |
5695 | } | |
5696 | $from =~ s[/][\\/]g; | |
5697 | $to =~ s[/][\\/]g; | |
5698 | return "/$from/$to/"; | |
5699 | } | |
5700 | } | |
5701 | ||
5a92c677 | 5702 | # Escape a characrter. |
2a9e2f8a | 5703 | # Only used by tr///, so backslashes hyphens |
5a92c677 | 5704 | |
664c1f42 | 5705 | sub pchr { |
6e90668e | 5706 | my($n) = @_; |
664c1f42 | 5707 | return sprintf("\\x{%X}", $n) if $n > 255; |
9b324f0c KW |
5708 | return '\\\\' if $n == ord '\\'; |
5709 | return "\\-" if $n == ord "-"; | |
5710 | # I'm presuming a regex is not ok here, otherwise we could have used | |
5711 | # /[[:print:]]/a to get here | |
5712 | return chr($n) if ( utf8::native_to_unicode($n) | |
5713 | >= utf8::native_to_unicode(ord(' ')) | |
5714 | and utf8::native_to_unicode($n) | |
5715 | <= utf8::native_to_unicode(ord('~'))); | |
5716 | ||
5717 | my $mnemonic_pos = index("\a\b\e\f\n\r\t", chr($n)); | |
5718 | return "\\" . substr("abefnrt", $mnemonic_pos, 1) if $mnemonic_pos >= 0; | |
5719 | ||
5720 | return '\\c' . $unctrl{chr $n} if $n >= ord("\cA") and $n <= ord("\cZ"); | |
5721 | # return '\x' . sprintf("%02x", $n); | |
5722 | return '\\' . sprintf("%03o", $n); | |
6e90668e SM |
5723 | } |
5724 | ||
5a92c677 DM |
5725 | # Convert a list of characters into a string suitable for tr/// search or |
5726 | # replacement, with suitable escaping and collapsing of ranges | |
5727 | ||
6e90668e SM |
5728 | sub collapse { |
5729 | my(@chars) = @_; | |
23db111c | 5730 | my($str, $c, $tr) = (""); |
6e90668e SM |
5731 | for ($c = 0; $c < @chars; $c++) { |
5732 | $tr = $chars[$c]; | |
5733 | $str .= pchr($tr); | |
5734 | if ($c <= $#chars - 2 and $chars[$c + 1] == $tr + 1 and | |
5735 | $chars[$c + 2] == $tr + 2) | |
5736 | { | |
f4a44678 SM |
5737 | for (; $c <= $#chars-1 and $chars[$c + 1] == $chars[$c] + 1; $c++) |
5738 | {} | |
6e90668e SM |
5739 | $str .= "-"; |
5740 | $str .= pchr($chars[$c]); | |
5741 | } | |
5742 | } | |
5743 | return $str; | |
5744 | } | |
5745 | ||
f4a44678 SM |
5746 | sub tr_decode_byte { |
5747 | my($table, $flags) = @_; | |
6d63cc8e | 5748 | my $ssize_t = $Config{ptrsize} == 8 ? 'q' : 'l'; |
0b9a13c3 | 5749 | my ($size, @table) = unpack("${ssize_t}s*", $table); |
0b9a13c3 | 5750 | pop @table; # remove the wildcard final entry |
c923a699 | 5751 | |
6e90668e | 5752 | my($c, $tr, @from, @to, @delfrom, $delhyphen); |
d989cdac | 5753 | if ($table[ord "-"] != -1 and |
6e90668e SM |
5754 | $table[ord("-") - 1] == -1 || $table[ord("-") + 1] == -1) |
5755 | { | |
5756 | $tr = $table[ord "-"]; | |
5757 | $table[ord "-"] = -1; | |
5758 | if ($tr >= 0) { | |
5759 | @from = ord("-"); | |
5760 | @to = $tr; | |
5761 | } else { # -2 ==> delete | |
5762 | $delhyphen = 1; | |
5763 | } | |
5764 | } | |
2a9e2f8a | 5765 | for ($c = 0; $c < @table; $c++) { |
6e90668e SM |
5766 | $tr = $table[$c]; |
5767 | if ($tr >= 0) { | |
5768 | push @from, $c; push @to, $tr; | |
5769 | } elsif ($tr == -2) { | |
5770 | push @delfrom, $c; | |
5771 | } | |
5772 | } | |
6e90668e | 5773 | @from = (@from, @delfrom); |
4fc9437a | 5774 | |
f4a44678 | 5775 | if ($flags & OPpTRANS_COMPLEMENT) { |
4fc9437a DM |
5776 | unless ($flags & OPpTRANS_DELETE) { |
5777 | @to = () if ("@from" eq "@to"); | |
5778 | } | |
5779 | ||
6e90668e SM |
5780 | my @newfrom = (); |
5781 | my %from; | |
5782 | @from{@from} = (1) x @from; | |
5783 | for ($c = 0; $c < 256; $c++) { | |
5784 | push @newfrom, $c unless $from{$c}; | |
5785 | } | |
5786 | @from = @newfrom; | |
5787 | } | |
56d8b52c | 5788 | unless ($flags & OPpTRANS_DELETE || !@to) { |
6e90668e SM |
5789 | pop @to while $#to and $to[$#to] == $to[$#to -1]; |
5790 | } | |
6e90668e SM |
5791 | my($from, $to); |
5792 | $from = collapse(@from); | |
5793 | $to = collapse(@to); | |
5794 | $from .= "-" if $delhyphen; | |
f4a44678 SM |
5795 | return ($from, $to); |
5796 | } | |
5797 | ||
8914f6f0 | 5798 | my $infinity = ~0 >> 1; # IV_MAX |
760febe4 | 5799 | |
8914f6f0 KW |
5800 | sub tr_append_to_invlist { |
5801 | my ($list_ref, $current, $next) = @_; | |
f4a44678 | 5802 | |
8914f6f0 | 5803 | # Appends the range $current..$next-1 to the inversion list $list_ref |
f34acfec | 5804 | |
8914f6f0 KW |
5805 | printf STDERR "%d: %d..%d %s", __LINE__, $current, $next, Dumper $list_ref if DEBUG; |
5806 | ||
5807 | if (@$list_ref && $list_ref->[-1] == $current) { | |
5808 | ||
5809 | # The new range extends the current final one. If it is a finite | |
5810 | # rane, replace the current final by the new ending. | |
5811 | if (defined $next) { | |
5812 | $list_ref->[-1] = $next; | |
f34acfec | 5813 | } |
8914f6f0 KW |
5814 | else { |
5815 | # The new range extends to infinity, which means the current end | |
5816 | # of the inversion list is dangling. Removing it causes things to | |
5817 | # work. | |
5818 | pop @$list_ref; | |
f34acfec | 5819 | } |
8914f6f0 KW |
5820 | } |
5821 | else { # The new range starts after the current final one; add it as a | |
5822 | # new range | |
5823 | push @$list_ref, $current; | |
5824 | push @$list_ref, $next if defined $next; | |
5825 | } | |
5826 | ||
5827 | print STDERR __LINE__, ": ", Dumper $list_ref if DEBUG; | |
5828 | } | |
5829 | ||
5830 | sub tr_invlist_to_string { | |
5831 | my ($list_ref, $to_complement) = @_; | |
5832 | ||
5833 | # Stringify the inversion list $list_ref, possibly complementing it first. | |
5834 | # CAUTION: this can modify $list_ref. | |
5835 | ||
5836 | print STDERR __LINE__, ": ", Dumper $list_ref if DEBUG; | |
5837 | ||
5838 | if ($to_complement) { | |
5839 | ||
5840 | # Complementing an inversion list is done by prepending a 0 if it | |
5841 | # doesn't have one there already; otherwise removing the leading 0. | |
5842 | if ($list_ref->[0] == 0) { | |
5843 | shift @$list_ref; | |
f34acfec KW |
5844 | } |
5845 | else { | |
8914f6f0 | 5846 | unshift @$list_ref, 0; |
f34acfec | 5847 | } |
8914f6f0 KW |
5848 | |
5849 | print STDERR __LINE__, ": ", Dumper $list_ref if DEBUG; | |
f4a44678 | 5850 | } |
f34acfec | 5851 | |
8914f6f0 KW |
5852 | my $output = ""; |
5853 | ||
5854 | # Every other element is in the list. | |
5855 | for (my $i = 0; $i < @$list_ref; $i += 2) { | |
5856 | my $base = $list_ref->[$i]; | |
5857 | $output .= pchr($base); | |
5858 | last unless defined $list_ref->[$i+1]; | |
5859 | ||
5860 | # The beginning of the next element starts the range of items not in | |
5861 | # the list. | |
5862 | my $upper = $list_ref->[$i+1] - 1; | |
5863 | my $range = $upper - $base; | |
5864 | $output .= '-' if $range > 1; # Adjacent characters don't have a | |
5865 | # minus, though it would be legal to do | |
5866 | # so | |
5867 | $output .= pchr($upper) if $range > 0; | |
5868 | } | |
5869 | ||
5870 | print STDERR __LINE__, ": tr_invlist_to_string() returning '$output'\n" | |
5871 | if DEBUG; | |
5872 | return $output; | |
f34acfec KW |
5873 | } |
5874 | ||
8914f6f0 KW |
5875 | my $unmapped = ~0; |
5876 | my $special_handling = ~0 - 1; | |
5877 | ||
a5158e4f KW |
5878 | sub dump_invmap { |
5879 | my ($invlist_ref, $map_ref) = @_; | |
5880 | ||
5881 | for my $i (0 .. @$invlist_ref - 1) { | |
5882 | printf STDERR "[%d]\t%x\t", $i, $invlist_ref->[$i]; | |
5883 | my $map = $map_ref->[$i]; | |
5884 | if ($map == $unmapped) { | |
5885 | print STDERR "TR_UNMAPPED\n"; | |
5886 | } | |
5887 | elsif ($map == $special_handling) { | |
5888 | print STDERR "TR_SPECIAL\n"; | |
5889 | } | |
5890 | else { | |
5891 | printf STDERR "%x\n", $map; | |
5892 | } | |
5893 | } | |
5894 | } | |
5895 | ||
f34acfec KW |
5896 | sub tr_decode_utf8 { |
5897 | my($tr_av, $flags) = @_; | |
8914f6f0 KW |
5898 | |
5899 | printf STDERR "\n%s: %d: flags=0x%x\n", __FILE__, __LINE__, $flags if DEBUG; | |
5900 | ||
f34acfec KW |
5901 | my $invlist = $tr_av->ARRAYelt(0); |
5902 | my @invlist = unpack("J*", $invlist->PV); | |
5903 | my @map = unpack("J*", $tr_av->ARRAYelt(1)->PV); | |
5904 | ||
a5158e4f | 5905 | dump_invmap(\@invlist, \@map) if DEBUG; |
f34acfec | 5906 | |
8914f6f0 KW |
5907 | my @from; |
5908 | my @to; | |
f34acfec | 5909 | |
8914f6f0 KW |
5910 | # Go through the whole map |
5911 | for (my $i = 0; $i < @invlist; $i++) { | |
5912 | my $map = $map[$i]; | |
5913 | printf STDERR "%d: i=%d, source=%x, map=%x\n", | |
5914 | __LINE__, $i, $invlist[$i], $map if DEBUG; | |
5915 | ||
5916 | # Ignore any lines that are unmapped | |
5917 | next if $map == $unmapped; | |
5918 | ||
5919 | # Calculate this component of the mapping; First the lhs | |
5920 | my $this_from = $invlist[$i]; | |
5921 | my $next_from = $invlist[$i+1] if $i < @invlist - 1; | |
5922 | ||
5923 | # The length of the rhs is the same as the lhs, except when special | |
5924 | my $next_map = $map - $this_from + $next_from | |
5925 | if $map != $special_handling && defined $next_from; | |
5926 | ||
5927 | if (DEBUG) { | |
5928 | printf STDERR "%d: i=%d, from=%x, to=%x", | |
5929 | __LINE__, $i, $this_from, $map; | |
5930 | printf STDERR ", next_from=%x,", $next_from if defined $next_from; | |
5931 | printf STDERR ", next_map=%x", $next_map if defined $next_map; | |
5932 | print STDERR "\n"; | |
5933 | } | |
5934 | ||
5935 | # Add the lhs. | |
5936 | tr_append_to_invlist(\@from, $this_from, $next_from); | |
5937 | ||
5938 | # And, the rhs; special handling doesn't get output as it really is an | |
5939 | # unmatched rhs | |
5940 | tr_append_to_invlist(\@to, $map, $next_map) if $map != $special_handling; | |
f4a44678 | 5941 | } |
f34acfec | 5942 | |
8914f6f0 KW |
5943 | # Done with the input. |
5944 | ||
5945 | my $to; | |
5946 | if (join("", @from) eq join("", @to)) { | |
5947 | ||
5948 | # the rhs is suppressed if identical to the left. That's because | |
5949 | # tr/ABC/ABC/ can be written as tr/ABC//. (Do this comparison before | |
5950 | # any complementing) | |
5951 | $to = ""; | |
5952 | } | |
5953 | else { | |
5954 | $to = tr_invlist_to_string(\@to, 0); # rhs not complemented | |
f4a44678 | 5955 | } |
8914f6f0 KW |
5956 | |
5957 | my $from = tr_invlist_to_string(\@from, | |
5958 | ($flags & OPpTRANS_COMPLEMENT) != 0); | |
5959 | ||
5960 | print STDERR "Returning ", escape_str($from), "/", | |
5961 | escape_str($to), "\n" if DEBUG; | |
f4a44678 SM |
5962 | return (escape_str($from), escape_str($to)); |
5963 | } | |
5964 | ||
5965 | sub pp_trans { | |
5966 | my $self = shift; | |
05a502dc | 5967 | my($op, $cx, $morflags) = @_; |
f4a44678 | 5968 | my($from, $to); |
cb8157e3 | 5969 | my $class = class($op); |
b031d0e6 | 5970 | my $priv_flags = $op->private; |
cb8157e3 | 5971 | if ($class eq "PVOP") { |
b031d0e6 | 5972 | ($from, $to) = tr_decode_byte($op->pv, $priv_flags); |
cb8157e3 FC |
5973 | } elsif ($class eq "PADOP") { |
5974 | ($from, $to) | |
f34acfec | 5975 | = tr_decode_utf8($self->padval($op->padix), $priv_flags); |
f4a44678 | 5976 | } else { # class($op) eq "SVOP" |
f34acfec | 5977 | ($from, $to) = tr_decode_utf8($op->sv, $priv_flags); |
f4a44678 SM |
5978 | } |
5979 | my $flags = ""; | |
42b824d2 FC |
5980 | $flags .= "c" if $priv_flags & OPpTRANS_COMPLEMENT; |
5981 | $flags .= "d" if $priv_flags & OPpTRANS_DELETE; | |
f4a44678 | 5982 | $to = "" if $from eq $to and $flags eq ""; |
42b824d2 | 5983 | $flags .= "s" if $priv_flags & OPpTRANS_SQUASH; |
05a502dc FC |
5984 | $flags .= $morflags if defined $morflags; |
5985 | my $ret = $self->keyword("tr") . double_delim($from, $to) . $flags; | |
5986 | if (my $targ = $op->targ) { | |
5987 | return $self->maybe_parens($self->padname($targ) . " =~ $ret", | |
5988 | $cx, 20); | |
5989 | } | |
5990 | return $ret; | |
6e90668e SM |
5991 | } |
5992 | ||
05a502dc | 5993 | sub pp_transr { push @_, 'r'; goto &pp_trans } |
bb16bae8 | 5994 | |
e839e6ed DM |
5995 | # Join two components of a double-quoted re, disambiguating |
5996 | # "${foo}bar", "${foo}{bar}", "${foo}[1]". | |
5997 | ||
03b22f1b RGS |
5998 | sub re_dq_disambiguate { |
5999 | my ($first, $last) = @_; | |
03b22f1b RGS |
6000 | ($last =~ /^[A-Z\\\^\[\]_?]/ && |
6001 | $first =~ s/([\$@])\^$/${1}{^}/) # "${^}W" etc | |
6002 | || ($last =~ /^[{\[\w_]/ && | |
6003 | $first =~ s/([\$@])([A-Za-z_]\w*)$/${1}{$2}/); | |
6004 | return $first . $last; | |
6005 | } | |
6006 | ||
6e90668e SM |
6007 | # Like dq(), but different |
6008 | sub re_dq { | |
6009 | my $self = shift; | |
ba0372a0 | 6010 | my ($op) = @_; |
a9760014 | 6011 | |
3f872cb9 GS |
6012 | my $type = $op->name; |
6013 | if ($type eq "const") { | |
a9760014 | 6014 | my $unbacked = re_unback($self->const_sv($op)->as_string); |
ba0372a0 | 6015 | return re_uninterp(escape_re($unbacked)); |
3f872cb9 | 6016 | } elsif ($type eq "concat") { |
ba0372a0 FC |
6017 | my $first = $self->re_dq($op->first); |
6018 | my $last = $self->re_dq($op->last); | |
03b22f1b | 6019 | return re_dq_disambiguate($first, $last); |
e839e6ed DM |
6020 | } elsif ($type eq "multiconcat") { |
6021 | return $self->do_multiconcat($op, 26, 2); | |
3f872cb9 | 6022 | } elsif ($type eq "uc") { |
ba0372a0 | 6023 | return '\U' . $self->re_dq($op->first->sibling) . '\E'; |
3f872cb9 | 6024 | } elsif ($type eq "lc") { |
ba0372a0 | 6025 | return '\L' . $self->re_dq($op->first->sibling) . '\E'; |
3f872cb9 | 6026 | } elsif ($type eq "ucfirst") { |
ba0372a0 | 6027 | return '\u' . $self->re_dq($op->first->sibling); |
3f872cb9 | 6028 | } elsif ($type eq "lcfirst") { |
ba0372a0 | 6029 | return '\l' . $self->re_dq($op->first->sibling); |
3f872cb9 | 6030 | } elsif ($type eq "quotemeta") { |
ba0372a0 | 6031 | return '\Q' . $self->re_dq($op->first->sibling) . '\E'; |
838f2281 | 6032 | } elsif ($type eq "fc") { |
ba0372a0 | 6033 | return '\F' . $self->re_dq($op->first->sibling) . '\E'; |
3f872cb9 | 6034 | } elsif ($type eq "join") { |
9d2c6865 | 6035 | return $self->deparse($op->last, 26); # was join($", @ary) |
6e90668e | 6036 | } else { |
337d7381 | 6037 | my $ret = $self->deparse($op, 26); |
3f193e55 FC |
6038 | $ret =~ s/^\$([(|)])\z/\${$1}/ # $( $| $) need braces |
6039 | or $ret =~ s/^\@([-+])\z/\@{$1}/; # @- @+ need braces | |
337d7381 | 6040 | return $ret; |
6e90668e SM |
6041 | } |
6042 | } | |
6043 | ||
a9760014 RH |
6044 | sub pure_string { |
6045 | my ($self, $op) = @_; | |
64b007ad | 6046 | return 0 if null $op; |
a9760014 RH |
6047 | my $type = $op->name; |
6048 | ||
36727b53 | 6049 | if ($type eq 'const' || $type eq 'av2arylen') { |
a9760014 RH |
6050 | return 1; |
6051 | } | |
838f2281 | 6052 | elsif ($type =~ /^(?:[ul]c(first)?|fc)$/ || $type eq 'quotemeta') { |
a9760014 RH |
6053 | return $self->pure_string($op->first->sibling); |
6054 | } | |
6055 | elsif ($type eq 'join') { | |
6056 | my $join_op = $op->first->sibling; # Skip pushmark | |
76e14ed3 | 6057 | return 0 unless $join_op->name eq 'null' && $join_op->targ == OP_RV2SV; |
a9760014 RH |
6058 | |
6059 | my $gvop = $join_op->first; | |
6060 | return 0 unless $gvop->name eq 'gvsv'; | |
6061 | return 0 unless '"' eq $self->gv_name($self->gv_or_padgv($gvop)); | |
6062 | ||
6063 | return 0 unless ${$join_op->sibling} eq ${$op->last}; | |
21b7468a | 6064 | return 0 unless $op->last->name =~ /^(?:[ah]slice|(?:rv2|pad)av)$/; |
a9760014 RH |
6065 | } |
6066 | elsif ($type eq 'concat') { | |
6067 | return $self->pure_string($op->first) | |
6068 | && $self->pure_string($op->last); | |
6069 | } | |
e839e6ed DM |
6070 | elsif ($type eq 'multiconcat') { |
6071 | my ($kid, @kids); | |
6072 | for ($kid = $op->first; !null $kid; $kid = $kid->sibling) { | |
6073 | # skip the consts and/or padsv we've optimised away | |
6074 | push @kids, $kid | |
6075 | unless $kid->type == OP_NULL | |
6076 | && ( $kid->targ == OP_PADSV | |
6077 | || $kid->targ == OP_CONST | |
6078 | || $kid->targ == OP_PUSHMARK); | |
6079 | } | |
6080 | ||
6081 | if ($op->flags & OPf_STACKED) { | |
6082 | # remove expr from @kids where 'expr = ...' or 'expr .= ....' | |
6083 | if ($op->private & OPpMULTICONCAT_APPEND) { | |
6084 | shift(@kids); | |
6085 | } | |
6086 | else { | |
6087 | pop(@kids); | |
6088 | } | |
6089 | } | |
6090 | for (@kids) { | |
6091 | return 0 unless $self->pure_string($_); | |
6092 | } | |
6093 | return 1; | |
6094 | } | |
d989cdac SM |
6095 | elsif (is_scalar($op) || $type =~ /^[ah]elem$/) { |
6096 | return 1; | |
6097 | } | |
fedf30e1 DM |
6098 | elsif ($type eq "null" and $op->can('first') and not null $op->first) { |
6099 | my $first = $op->first; | |
6100 | ||
6101 | return 1 if $first->name eq "multideref"; | |
6102 | return 1 if $first->name eq "aelemfast_lex"; | |
6103 | ||
6104 | if ( $first->name eq "null" | |
6105 | and $first->can('first') | |
6106 | and not null $first->first | |
6107 | and $first->first->name eq "aelemfast" | |
6108 | ) | |
6109 | { | |
6110 | return 1; | |
6111 | } | |
a9760014 RH |
6112 | } |
6113 | ||
fedf30e1 | 6114 | return 0; |
a9760014 RH |
6115 | } |
6116 | ||
061bc525 | 6117 | sub code_list { |
ba0372a0 | 6118 | my ($self,$op,$cv) = @_; |
061bc525 FC |
6119 | |
6120 | # localise stuff relating to the current sub | |
6121 | $cv and | |
6122 | local($self->{'curcv'}) = $cv, | |
6123 | local($self->{'curcvlex'}), | |
6124 | local(@$self{qw'curstash warnings hints hinthash curcop'}) | |
6125 | = @$self{qw'curstash warnings hints hinthash curcop'}; | |
6126 | ||
6127 | my $re; | |
3e18cd1c | 6128 | for ($op = $op->first->sibling; !null($op); $op = $op->sibling) { |
59d42aa0 | 6129 | if ($op->name eq 'null' and $op->flags & OPf_SPECIAL) { |
061bc525 FC |
6130 | my $scope = $op->first; |
6131 | # 0 context (last arg to scopeop) means statement context, so | |
6132 | # the contents of the block will not be wrapped in do{...}. | |
6133 | my $block = scopeop($scope->first->name eq "enter", $self, | |
6134 | $scope, 0); | |
6135 | # next op is the source code of the block | |
6136 | $op = $op->sibling; | |
6137 | $re .= ($self->const_sv($op)->PV =~ m|^(\(\?\??\{)|)[0]; | |
6138 | my $multiline = $block =~ /\n/; | |
6139 | $re .= $multiline ? "\n\t" : ' '; | |
6140 | $re .= $block; | |
6141 | $re .= $multiline ? "\n\b})" : " })"; | |
59d42aa0 | 6142 | } else { |
ba0372a0 | 6143 | $re = re_dq_disambiguate($re, $self->re_dq($op)); |
061bc525 FC |
6144 | } |
6145 | } | |
6146 | $re; | |
6147 | } | |
6148 | ||
a9760014 | 6149 | sub regcomp { |
6e90668e | 6150 | my $self = shift; |
ba0372a0 | 6151 | my($op, $cx) = @_; |
6e90668e | 6152 | my $kid = $op->first; |
3f872cb9 GS |
6153 | $kid = $kid->first if $kid->name eq "regcmaybe"; |
6154 | $kid = $kid->first if $kid->name eq "regcreset"; | |
bae5b54e FC |
6155 | my $kname = $kid->name; |
6156 | if ($kname eq "null" and !null($kid->first) | |
131b3ad0 DM |
6157 | and $kid->first->name eq 'pushmark') |
6158 | { | |
6159 | my $str = ''; | |
6160 | $kid = $kid->first->sibling; | |
6161 | while (!null($kid)) { | |
03b22f1b | 6162 | my $first = $str; |
ba0372a0 | 6163 | my $last = $self->re_dq($kid); |
03b22f1b | 6164 | $str = re_dq_disambiguate($first, $last); |
131b3ad0 DM |
6165 | $kid = $kid->sibling; |
6166 | } | |
6167 | return $str, 1; | |
6168 | } | |
6169 | ||
bae5b54e FC |
6170 | return ($self->re_dq($kid), 1) |
6171 | if $kname =~ /^(?:rv2|pad)av/ or $self->pure_string($kid); | |
a9760014 RH |
6172 | return ($self->deparse($kid, $cx), 0); |
6173 | } | |
6174 | ||
6175 | sub pp_regcomp { | |
6176 | my ($self, $op, $cx) = @_; | |
6177 | return (($self->regcomp($op, $cx, 0))[0]); | |
6e90668e SM |
6178 | } |
6179 | ||
c3ae113d FC |
6180 | sub re_flags { |
6181 | my ($self, $op) = @_; | |
6182 | my $flags = ''; | |
6183 | my $pmflags = $op->pmflags; | |
3b91d897 FC |
6184 | if (!$pmflags) { |
6185 | my $re = $op->pmregexp; | |
6186 | if ($$re) { | |
6187 | $pmflags = $re->compflags; | |
6188 | } | |
6189 | } | |
c3ae113d FC |
6190 | $flags .= "g" if $pmflags & PMf_GLOBAL; |
6191 | $flags .= "i" if $pmflags & PMf_FOLD; | |
6192 | $flags .= "m" if $pmflags & PMf_MULTILINE; | |
6193 | $flags .= "o" if $pmflags & PMf_KEEP; | |
6194 | $flags .= "s" if $pmflags & PMf_SINGLELINE; | |
6195 | $flags .= "x" if $pmflags & PMf_EXTENDED; | |
334afb3e | 6196 | $flags .= "x" if $pmflags & PMf_EXTENDED_MORE; |
dc6dfd62 LM |
6197 | $flags .= "p" if $pmflags & PMf_KEEPCOPY; |
6198 | $flags .= "n" if $pmflags & PMf_NOCAPTURE; | |
6199 | if (my $charset = $pmflags & PMf_CHARSET) { | |
c3ae113d FC |
6200 | # Hardcoding this is fragile, but B does not yet export the |
6201 | # constants we need. | |
fde14af1 | 6202 | $flags .= qw(d l u a aa)[$charset >> 7] |
c3ae113d FC |
6203 | } |
6204 | # The /d flag is indicated by 0; only show it if necessary. | |
6205 | elsif ($self->{hinthash} and | |
6206 | $self->{hinthash}{reflags_charset} | |
dff5ffe4 | 6207 | || $self->{hinthash}{feature_unicode} |
149758b3 NC |
6208 | or $self->{hints} & $feature::hint_mask |
6209 | && ($self->{hints} & $feature::hint_mask) | |
6210 | != $feature::hint_mask | |
dc6dfd62 LM |
6211 | && $self->{hints} & $feature::hint_uni8bit |
6212 | ) { | |
c3ae113d FC |
6213 | $flags .= 'd'; |
6214 | } | |
6215 | $flags; | |
6216 | } | |
6217 | ||
6e90668e SM |
6218 | # osmic acid -- see osmium tetroxide |
6219 | ||
6220 | my %matchwords; | |
6221 | map($matchwords{join "", sort split //, $_} = $_, 'cig', 'cog', 'cos', 'cogs', | |
d989cdac | 6222 | 'cox', 'go', 'is', 'ism', 'iso', 'mig', 'mix', 'osmic', 'ox', 'sic', |
54421dd4 | 6223 | 'sig', 'six', 'smog', 'so', 'soc', 'sog', 'xi', 'soup', 'soupmix'); |
6e90668e | 6224 | |
59d42aa0 FC |
6225 | # When deparsing a regular expression with code blocks, we have to look in |
6226 | # various places to find the blocks. | |
6227 | # | |
6228 | # For qr/(?{...})/ without interpolation, the CV is under $qr->qr_anoncv | |
6229 | # and the code list (list of blocks and constants, maybe vars) is under | |
6230 | # $cv->ROOT->first->code_list: | |
6231 | # ./perl -Ilib -MB -e 'use O "Concise", B::svref_2object(sub {qr/(?{die})/})->ROOT->first->first->sibling->pmregexp->qr_anoncv->object_2svref' | |
6232 | # | |
6233 | # For qr/$a(?{...})/ with interpolation, the code list is more accessible, | |
6234 | # under $pmop->code_list, but the $cv is something you have to dig for in | |
6235 | # the regcomp op’s kids: | |
6236 | # ./perl -Ilib -mO=Concise -e 'qr/$a(?{die})/' | |
6237 | # | |
6238 | # For m// and split //, things are much simpler. There is no CV. The code | |
6239 | # list is under $pmop->code_list. | |
6240 | ||
90be192f | 6241 | sub matchop { |
6e90668e | 6242 | my $self = shift; |
90be192f | 6243 | my($op, $cx, $name, $delim) = @_; |
6e90668e | 6244 | my $kid = $op->first; |
9d2c6865 | 6245 | my ($binop, $var, $re) = ("", "", ""); |
5012eebe | 6246 | if ($op->name ne 'split' && $op->flags & OPf_STACKED) { |
9d2c6865 SM |
6247 | $binop = 1; |
6248 | $var = $self->deparse($kid, 20); | |
6e90668e SM |
6249 | $kid = $kid->sibling; |
6250 | } | |
9e32885a FC |
6251 | # not $name; $name will be 'm' for both match and split |
6252 | elsif ($op->name eq 'match' and my $targ = $op->targ) { | |
05a502dc FC |
6253 | $binop = 1; |
6254 | $var = $self->padname($targ); | |
6255 | } | |
a9760014 | 6256 | my $quote = 1; |
86e39c78 | 6257 | my $pmflags = $op->pmflags; |
a539498a | 6258 | my $rhs_bound_to_defsv; |
59d42aa0 FC |
6259 | my ($cv, $bregexp); |
6260 | my $have_kid = !null $kid; | |
6261 | # Check for code blocks first | |
6262 | if (not null my $code_list = $op->code_list) { | |
ba0372a0 | 6263 | $re = $self->code_list($code_list, |
59d42aa0 FC |
6264 | $op->name eq 'qr' |
6265 | ? $self->padval( | |
6266 | $kid->first # ex-list | |
6267 | ->first # pushmark | |
6268 | ->sibling # entersub | |
6269 | ->first # ex-list | |
6270 | ->first # pushmark | |
6271 | ->sibling # srefgen | |
6272 | ->first # ex-list | |
6273 | ->first # anoncode | |
6274 | ->targ | |
6275 | ) | |
6276 | : undef); | |
6277 | } elsif (${$bregexp = $op->pmregexp} && ${$cv = $bregexp->qr_anoncv}) { | |
061bc525 FC |
6278 | my $patop = $cv->ROOT # leavesub |
6279 | ->first # qr | |
3e18cd1c | 6280 | ->code_list;# list |
ba0372a0 | 6281 | $re = $self->code_list($patop, $cv); |
59d42aa0 | 6282 | } elsif (!$have_kid) { |
ba0372a0 | 6283 | $re = re_uninterp(escape_re(re_unback($op->precomp))); |
a9760014 | 6284 | } elsif ($kid->name ne 'regcomp') { |
5012eebe DM |
6285 | if ($op->name eq 'split') { |
6286 | # split has other kids, not just regcomp | |
6287 | $re = re_uninterp(escape_re(re_unback($op->precomp))); | |
6288 | } | |
6289 | else { | |
6290 | carp("found ".$kid->name." where regcomp expected"); | |
6291 | } | |
6e90668e | 6292 | } else { |
ba0372a0 | 6293 | ($re, $quote) = $self->regcomp($kid, 21); |
59d42aa0 FC |
6294 | } |
6295 | if ($have_kid and $kid->name eq 'regcomp') { | |
7fb31b92 | 6296 | my $matchop = $kid->first; |
d02d1323 | 6297 | if ($matchop->name eq 'regcreset') { |
7fb31b92 DM |
6298 | $matchop = $matchop->first; |
6299 | } | |
5e5a1632 FC |
6300 | if ($matchop->name =~ /^(?:match|transr?|subst)\z/ |
6301 | && $matchop->flags & OPf_SPECIAL) { | |
6302 | $rhs_bound_to_defsv = 1; | |
6303 | } | |
6e90668e SM |
6304 | } |
6305 | my $flags = ""; | |
5992ca2b | 6306 | $flags .= "c" if $pmflags & PMf_CONTINUE; |
c3ae113d FC |
6307 | $flags .= $self->re_flags($op); |
6308 | $flags = join '', sort split //, $flags; | |
6e90668e | 6309 | $flags = $matchwords{$flags} if $matchwords{$flags}; |
5992ca2b | 6310 | if ($pmflags & PMf_ONCE) { # only one kind of delimiter works here |
6e90668e | 6311 | $re =~ s/\?/\\?/g; |
7741ceed | 6312 | $re = $self->keyword("m") . "?$re?"; # explicit 'm' is required |
a9760014 | 6313 | } elsif ($quote) { |
7741ceed | 6314 | $re = single_delim($name, $delim, $re, $self); |
9d2c6865 | 6315 | } |
a9760014 | 6316 | $re = $re . $flags if $quote; |
9d2c6865 | 6317 | if ($binop) { |
a539498a FC |
6318 | return |
6319 | $self->maybe_parens( | |
6320 | $rhs_bound_to_defsv | |
6321 | ? "$var =~ (\$_ =~ $re)" | |
6322 | : "$var =~ $re", | |
6323 | $cx, 20 | |
6324 | ); | |
9d2c6865 SM |
6325 | } else { |
6326 | return $re; | |
6e90668e | 6327 | } |
6e90668e SM |
6328 | } |
6329 | ||
90be192f | 6330 | sub pp_match { matchop(@_, "m", "/") } |
90be192f | 6331 | sub pp_qr { matchop(@_, "qr", "") } |
6e90668e | 6332 | |
84ed0108 FC |
6333 | sub pp_runcv { unop(@_, "__SUB__"); } |
6334 | ||
6e90668e SM |
6335 | sub pp_split { |
6336 | my $self = shift; | |
9d2c6865 | 6337 | my($op, $cx) = @_; |
6e90668e | 6338 | my($kid, @exprs, $ary, $expr); |
5012eebe DM |
6339 | my $stacked = $op->flags & OPf_STACKED; |
6340 | ||
6e90668e | 6341 | $kid = $op->first; |
5012eebe DM |
6342 | $kid = $kid->sibling if $kid->name eq 'regcomp'; |
6343 | for (; !null($kid); $kid = $kid->sibling) { | |
6344 | push @exprs, $self->deparse($kid, 6); | |
6345 | } | |
c6e79e55 | 6346 | |
5012eebe DM |
6347 | unshift @exprs, $self->matchop($op, $cx, "m", "/"); |
6348 | ||
6349 | if ($op->private & OPpSPLIT_ASSIGN) { | |
6350 | # With C<@array = split(/pat/, str);>, | |
6351 | # array is stored in split's pmreplroot; either | |
6352 | # as an integer index into the pad (for a lexical array) | |
6353 | # or as GV for a package array (which will be a pad index | |
6354 | # on threaded builds) | |
6355 | # With my/our @array = split(/pat/, str), the array is instead | |
6356 | # accessed via an extra padav/rv2av op at the end of the | |
6357 | # split's kid ops. | |
6358 | ||
6359 | if ($stacked) { | |
6360 | $ary = pop @exprs; | |
6361 | } | |
6362 | else { | |
6363 | if ($op->private & OPpSPLIT_LEX) { | |
6364 | $ary = $self->padname($op->pmreplroot); | |
6365 | } | |
6366 | else { | |
6367 | # union with op_pmtargetoff, op_pmtargetgv | |
6368 | my $gv = $op->pmreplroot; | |
6369 | $gv = $self->padval($gv) if !ref($gv); | |
6370 | $ary = $self->maybe_local(@_, | |
de183bbb FC |
6371 | $self->stash_variable('@', |
6372 | $self->gv_name($gv), | |
6373 | $cx)) | |
5012eebe | 6374 | } |
692044df DM |
6375 | if ($op->private & OPpLVAL_INTRO) { |
6376 | $ary = $op->private & OPpSPLIT_LEX ? "my $ary" : "local $ary"; | |
6377 | } | |
5012eebe | 6378 | } |
6e90668e | 6379 | } |
fcd95d64 | 6380 | |
f86ea535 | 6381 | # handle special case of split(), and split(' ') that compiles to /\s+/ |
5012eebe | 6382 | $exprs[0] = q{' '} if ($op->reflags // 0) & RXf_SKIPWHITE(); |
fcd95d64 | 6383 | |
6e90668e SM |
6384 | $expr = "split(" . join(", ", @exprs) . ")"; |
6385 | if ($ary) { | |
9d2c6865 | 6386 | return $self->maybe_parens("$ary = $expr", $cx, 7); |
6e90668e SM |
6387 | } else { |
6388 | return $expr; | |
6389 | } | |
6390 | } | |
6391 | ||
6392 | # oxime -- any of various compounds obtained chiefly by the action of | |
6393 | # hydroxylamine on aldehydes and ketones and characterized by the | |
6394 | # bivalent grouping C=NOH [Webster's Tenth] | |
6395 | ||
6396 | my %substwords; | |
6397 | map($substwords{join "", sort split //, $_} = $_, 'ego', 'egoism', 'em', | |
6398 | 'es', 'ex', 'exes', 'gee', 'go', 'goes', 'ie', 'ism', 'iso', 'me', | |
6399 | 'meese', 'meso', 'mig', 'mix', 'os', 'ox', 'oxime', 'see', 'seem', | |
ddc6eb27 | 6400 | 'seg', 'sex', 'sig', 'six', 'smog', 'sog', 'some', 'xi', 'rogue', |
4f4d7508 DC |
6401 | 'sir', 'rise', 'smore', 'more', 'seer', 'rome', 'gore', 'grim', 'grime', |
6402 | 'or', 'rose', 'rosie'); | |
6e90668e SM |
6403 | |
6404 | sub pp_subst { | |
6405 | my $self = shift; | |
9d2c6865 | 6406 | my($op, $cx) = @_; |
6e90668e | 6407 | my $kid = $op->first; |
9d2c6865 | 6408 | my($binop, $var, $re, $repl) = ("", "", "", ""); |
6e90668e | 6409 | if ($op->flags & OPf_STACKED) { |
9d2c6865 SM |
6410 | $binop = 1; |
6411 | $var = $self->deparse($kid, 20); | |
6e90668e SM |
6412 | $kid = $kid->sibling; |
6413 | } | |
05a502dc FC |
6414 | elsif (my $targ = $op->targ) { |
6415 | $binop = 1; | |
6416 | $var = $self->padname($targ); | |
6417 | } | |
d989cdac | 6418 | my $flags = ""; |
86e39c78 | 6419 | my $pmflags = $op->pmflags; |
6e90668e | 6420 | if (null($op->pmreplroot)) { |
ef90d20a | 6421 | $repl = $kid; |
6e90668e SM |
6422 | $kid = $kid->sibling; |
6423 | } else { | |
6424 | $repl = $op->pmreplroot->first; # skip substcont | |
ef90d20a FC |
6425 | } |
6426 | while ($repl->name eq "entereval") { | |
6e90668e SM |
6427 | $repl = $repl->first; |
6428 | $flags .= "e"; | |
ef90d20a | 6429 | } |
9f125c4a FC |
6430 | { |
6431 | local $self->{in_subst_repl} = 1; | |
6432 | if ($pmflags & PMf_EVAL) { | |
d989cdac | 6433 | $repl = $self->deparse($repl->first, 0); |
9f125c4a | 6434 | } else { |
bd0865ec | 6435 | $repl = $self->dq($repl); |
9f125c4a | 6436 | } |
6e90668e | 6437 | } |
87ebe743 | 6438 | if (not null my $code_list = $op->code_list) { |
ba0372a0 | 6439 | $re = $self->code_list($code_list); |
87ebe743 | 6440 | } elsif (null $kid) { |
ba0372a0 | 6441 | $re = re_uninterp(escape_re(re_unback($op->precomp))); |
6e90668e | 6442 | } else { |
ba0372a0 | 6443 | ($re) = $self->regcomp($kid, 1); |
a798dbf2 | 6444 | } |
86e39c78 FC |
6445 | $flags .= "r" if $pmflags & PMf_NONDESTRUCT; |
6446 | $flags .= "e" if $pmflags & PMf_EVAL; | |
c3ae113d FC |
6447 | $flags .= $self->re_flags($op); |
6448 | $flags = join '', sort split //, $flags; | |
6e90668e | 6449 | $flags = $substwords{$flags} if $substwords{$flags}; |
7741ceed | 6450 | my $core_s = $self->keyword("s"); # maybe CORE::s |
9d2c6865 | 6451 | if ($binop) { |
7741ceed | 6452 | return $self->maybe_parens("$var =~ $core_s" |
9d2c6865 SM |
6453 | . double_delim($re, $repl) . $flags, |
6454 | $cx, 20); | |
6455 | } else { | |
7741ceed | 6456 | return "$core_s". double_delim($re, $repl) . $flags; |
9d2c6865 | 6457 | } |
a798dbf2 MB |
6458 | } |
6459 | ||
73582821 AC |
6460 | sub is_lexical_subs { |
6461 | my (@ops) = shift; | |
6462 | for my $op (@ops) { | |
6463 | return 0 if $op->name !~ /\A(?:introcv|clonecv)\z/; | |
6464 | } | |
6465 | return 1; | |
6466 | } | |
6467 | ||
d4f1bfe7 FC |
6468 | # Pretend these two ops do not exist. The perl parser adds them to the |
6469 | # beginning of any block containing my-sub declarations, whereas we handle | |
6470 | # the subs in pad_subs and next_todo. | |
6471 | *pp_clonecv = *pp_introcv; | |
73582821 AC |
6472 | sub pp_introcv { |
6473 | my $self = shift; | |
6474 | my($op, $cx) = @_; | |
6475 | # For now, deparsing doesn't worry about the distinction between introcv | |
6476 | # and clonecv, so pretend this op doesn't exist: | |
6477 | return ''; | |
6478 | } | |
6479 | ||
73582821 AC |
6480 | sub pp_padcv { |
6481 | my $self = shift; | |
6482 | my($op, $cx) = @_; | |
6483 | return $self->padany($op); | |
6484 | } | |
6485 | ||
9187b6e4 FC |
6486 | my %lvref_funnies = ( |
6487 | OPpLVREF_SV, => '$', | |
6488 | OPpLVREF_AV, => '@', | |
6489 | OPpLVREF_HV, => '%', | |
6490 | OPpLVREF_CV, => '&', | |
6491 | ); | |
6492 | ||
6493 | sub pp_refassign { | |
6494 | my ($self, $op, $cx) = @_; | |
6495 | my $left; | |
6496 | if ($op->private & OPpLVREF_ELEM) { | |
3028eff1 | 6497 | $left = $op->first->sibling; |
9187b6e4 FC |
6498 | $left = maybe_local(@_, elem($self, $left, undef, |
6499 | $left->targ == OP_AELEM | |
6500 | ? qw([ ] padav) | |
6501 | : qw({ } padhv))); | |
6502 | } elsif ($op->flags & OPf_STACKED) { | |
6503 | $left = maybe_local(@_, | |
6504 | $lvref_funnies{$op->private & OPpLVREF_TYPE} | |
6505 | . $self->deparse($op->first->sibling)); | |
6506 | } else { | |
6507 | $left = &pp_padsv; | |
6508 | } | |
6509 | my $right = $self->deparse_binop_right($op, $op->first, 7); | |
6510 | return $self->maybe_parens("\\$left = $right", $cx, 7); | |
6511 | } | |
6512 | ||
6513 | sub pp_lvref { | |
6514 | my ($self, $op, $cx) = @_; | |
6515 | my $code; | |
6516 | if ($op->private & OPpLVREF_ELEM) { | |
6517 | $code = $op->first->name =~ /av\z/ ? &pp_aelem : &pp_helem; | |
6518 | } elsif ($op->flags & OPf_STACKED) { | |
6519 | $code = maybe_local(@_, | |
6520 | $lvref_funnies{$op->private & OPpLVREF_TYPE} | |
6521 | . $self->deparse($op->first)); | |
6522 | } else { | |
6523 | $code = &pp_padsv; | |
6524 | } | |
6525 | "\\$code"; | |
6526 | } | |
6527 | ||
6528 | sub pp_lvrefslice { | |
6529 | my ($self, $op, $cx) = @_; | |
6530 | '\\' . ($op->last->name =~ /av\z/ ? &pp_aslice : &pp_hslice); | |
6531 | } | |
6532 | ||
6533 | sub pp_lvavref { | |
6534 | my ($self, $op, $cx) = @_; | |
6535 | '\\(' . ($op->flags & OPf_STACKED | |
6536 | ? maybe_local(@_, rv2x(@_, "\@")) | |
6537 | : &pp_padsv) . ')' | |
6538 | } | |
6539 | ||
4fa06845 DM |
6540 | |
6541 | sub pp_argcheck { | |
6542 | my $self = shift; | |
6543 | my($op, $cx) = @_; | |
6544 | my ($params, $opt_params, $slurpy) = $op->aux_list($self->{curcv}); | |
6545 | my $mandatory = $params - $opt_params; | |
6546 | my $check = ''; | |
6547 | ||
6548 | $check .= <<EOF if !$slurpy; | |
6549 | die sprintf("Too many arguments for subroutine at %s line %d.\\n", (caller)[1, 2]) unless \@_ <= $params; | |
6550 | EOF | |
6551 | ||
6552 | $check .= <<EOF if $mandatory > 0; | |
6553 | die sprintf("Too few arguments for subroutine at %s line %d.\\n", (caller)[1, 2]) unless \@_ >= $mandatory; | |
6554 | EOF | |
6555 | ||
6556 | my $cond = ($params & 1) ? 'unless' : 'if'; | |
6557 | $check .= <<EOF if $slurpy eq '%'; | |
6558 | die sprintf("Odd name/value argument for subroutine at %s line %d.\\n", (caller)[1, 2]) if \@_ > $params && ((\@_ - $params) & 1); | |
6559 | EOF | |
6560 | ||
6561 | $check =~ s/;\n\z//; | |
6562 | return $check; | |
6563 | } | |
6564 | ||
6565 | ||
6566 | sub pp_argelem { | |
6567 | my $self = shift; | |
6568 | my($op, $cx) = @_; | |
6569 | my $var = $self->padname($op->targ); | |
6570 | my $ix = $op->string($self->{curcv}); | |
6571 | my $expr; | |
6572 | if ($op->flags & OPf_KIDS) { | |
6573 | $expr = $self->deparse($op->first, 7); | |
6574 | } | |
6575 | elsif ($var =~ /^[@%]/) { | |
6576 | $expr = $ix ? "\@_[$ix .. \$#_]" : '@_'; | |
6577 | } | |
6578 | else { | |
6579 | $expr = "\$_[$ix]"; | |
6580 | } | |
6581 | return "my $var = $expr"; | |
6582 | } | |
6583 | ||
6584 | ||
6585 | sub pp_argdefelem { | |
6586 | my $self = shift; | |
6587 | my($op, $cx) = @_; | |
6588 | my $ix = $op->targ; | |
6589 | my $expr = "\@_ >= " . ($ix+1) . " ? \$_[$ix] : "; | |
60f638af DM |
6590 | my $def = $self->deparse($op->first, 7); |
6591 | $def = "($def)" if $op->first->flags & OPf_PARENS; | |
4fa06845 DM |
6592 | $expr .= $self->deparse($op->first, $cx); |
6593 | return $expr; | |
6594 | } | |
6595 | ||
6596 | ||
f79e2ff9 PE |
6597 | sub pp_pushdefer { |
6598 | my $self = shift; | |
6599 | my($op, $cx) = @_; | |
6600 | # defer block body is stored in the ->first of an OP_NULL that is | |
6601 | # ->first of OP_PUSHDEFER | |
6602 | my $body = $self->deparse($op->first->first); | |
6603 | return "defer {\n\t$body\n\b}\cK"; | |
6604 | } | |
6605 | ||
852c1a84 PE |
6606 | sub builtin1 { |
6607 | my $self = shift; | |
6608 | my ($op, $cx, $name) = @_; | |
6609 | my $arg = $self->deparse($op->first); | |
6610 | # TODO: work out if lexical alias is present somehow... | |
6611 | return "builtin::$name($arg)"; | |
6612 | } | |
6613 | ||
6614 | sub pp_isbool { builtin1(@_, "isbool") } | |
6615 | ||
a798dbf2 | 6616 | 1; |
f6f9bdb7 SM |
6617 | __END__ |
6618 | ||
6619 | =head1 NAME | |
6620 | ||
6621 | B::Deparse - Perl compiler backend to produce perl code | |
6622 | ||
6623 | =head1 SYNOPSIS | |
6624 | ||
d989cdac | 6625 | B<perl> B<-MO=Deparse>[B<,-d>][B<,-f>I<FILE>][B<,-p>][B<,-q>][B<,-l>] |
646bba82 | 6626 | [B<,-s>I<LETTERS>][B<,-x>I<LEVEL>] I<prog.pl> |
f6f9bdb7 SM |
6627 | |
6628 | =head1 DESCRIPTION | |
6629 | ||
6630 | B::Deparse is a backend module for the Perl compiler that generates | |
6631 | perl source code, based on the internal compiled structure that perl | |
d4963d04 | 6632 | itself creates after parsing a program. The output of B::Deparse won't |
f6f9bdb7 SM |
6633 | be exactly the same as the original source, since perl doesn't keep |
6634 | track of comments or whitespace, and there isn't a one-to-one | |
6635 | correspondence between perl's syntactical constructions and their | |
d4963d04 | 6636 | compiled form, but it will often be close. When you use the B<-p> |
9d2c6865 SM |
6637 | option, the output also includes parentheses even when they are not |
6638 | required by precedence, which can make it easy to see if perl is | |
6639 | parsing your expressions the way you intended. | |
f6f9bdb7 | 6640 | |
d989cdac SM |
6641 | While B::Deparse goes to some lengths to try to figure out what your |
6642 | original program was doing, some parts of the language can still trip | |
d4963d04 | 6643 | it up; it still fails even on some parts of Perl's own test suite. If |
d989cdac SM |
6644 | you encounter a failure other than the most common ones described in |
6645 | the BUGS section below, you can help contribute to B::Deparse's | |
6646 | ongoing development by submitting a bug report with a small | |
6647 | example. | |
f6f9bdb7 SM |
6648 | |
6649 | =head1 OPTIONS | |
6650 | ||
9d2c6865 SM |
6651 | As with all compiler backend options, these must follow directly after |
6652 | the '-MO=Deparse', separated by a comma but not any white space. | |
f6f9bdb7 SM |
6653 | |
6654 | =over 4 | |
6655 | ||
d989cdac SM |
6656 | =item B<-d> |
6657 | ||
6658 | Output data values (when they appear as constants) using Data::Dumper. | |
6659 | Without this option, B::Deparse will use some simple routines of its | |
d4963d04 | 6660 | own for the same purpose. Currently, Data::Dumper is better for some |
d989cdac SM |
6661 | kinds of data (such as complex structures with sharing and |
6662 | self-reference) while the built-in routines are better for others | |
6663 | (such as odd floating-point values). | |
6664 | ||
6665 | =item B<-f>I<FILE> | |
6666 | ||
6667 | Normally, B::Deparse deparses the main code of a program, and all the subs | |
d4963d04 FC |
6668 | defined in the same file. To include subs defined in |
6669 | other files, pass the B<-f> option with the filename. | |
6670 | You can pass the B<-f> option several times, to | |
d989cdac SM |
6671 | include more than one secondary file. (Most of the time you don't want to |
6672 | use it at all.) You can also use this option to include subs which are | |
6673 | defined in the scope of a B<#line> directive with two parameters. | |
6674 | ||
bd0865ec GS |
6675 | =item B<-l> |
6676 | ||
6677 | Add '#line' declarations to the output based on the line and file | |
6678 | locations of the original code. | |
6679 | ||
9d2c6865 SM |
6680 | =item B<-p> |
6681 | ||
d4963d04 | 6682 | Print extra parentheses. Without this option, B::Deparse includes |
9d2c6865 | 6683 | parentheses in its output only when they are needed, based on the |
d4963d04 FC |
6684 | structure of your program. With B<-p>, it uses parentheses (almost) |
6685 | whenever they would be legal. This can be useful if you are used to | |
6686 | LISP, or if you want to see how perl parses your input. If you say | |
9d2c6865 | 6687 | |
d989cdac | 6688 | if ($var & 0x7f == 65) {print "Gimme an A!"} |
9d2c6865 SM |
6689 | print ($which ? $a : $b), "\n"; |
6690 | $name = $ENV{USER} or "Bob"; | |
6691 | ||
6692 | C<B::Deparse,-p> will print | |
6693 | ||
6694 | if (($var & 0)) { | |
6695 | print('Gimme an A!') | |
6696 | }; | |
6697 | (print(($which ? $a : $b)), '???'); | |
6698 | (($name = $ENV{'USER'}) or '???') | |
6699 | ||
6700 | which probably isn't what you intended (the C<'???'> is a sign that | |
6701 | perl optimized away a constant value). | |
6702 | ||
acaaef34 RGS |
6703 | =item B<-P> |
6704 | ||
d4963d04 FC |
6705 | Disable prototype checking. With this option, all function calls are |
6706 | deparsed as if no prototype was defined for them. In other words, | |
acaaef34 RGS |
6707 | |
6708 | perl -MO=Deparse,-P -e 'sub foo (\@) { 1 } foo @x' | |
6709 | ||
6710 | will print | |
6711 | ||
6712 | sub foo (\@) { | |
6713 | 1; | |
6714 | } | |
6715 | &foo(\@x); | |
6716 | ||
6717 | making clear how the parameters are actually passed to C<foo>. | |
6718 | ||
bd0865ec GS |
6719 | =item B<-q> |
6720 | ||
6721 | Expand double-quoted strings into the corresponding combinations of | |
d4963d04 | 6722 | concatenation, uc, ucfirst, lc, lcfirst, quotemeta, and join. For |
bd0865ec GS |
6723 | instance, print |
6724 | ||
6725 | print "Hello, $world, @ladies, \u$gentlemen\E, \u\L$me!"; | |
6726 | ||
6727 | as | |
6728 | ||
6729 | print 'Hello, ' . $world . ', ' . join($", @ladies) . ', ' | |
6730 | . ucfirst($gentlemen) . ', ' . ucfirst(lc $me . '!'); | |
6731 | ||
6732 | Note that the expanded form represents the way perl handles such | |
6733 | constructions internally -- this option actually turns off the reverse | |
d4963d04 | 6734 | translation that B::Deparse usually does. On the other hand, note that |
bd0865ec GS |
6735 | C<$x = "$y"> is not the same as C<$x = $y>: the former makes the value |
6736 | of $y into a string before doing the assignment. | |
6737 | ||
9d2c6865 SM |
6738 | =item B<-s>I<LETTERS> |
6739 | ||
d4963d04 FC |
6740 | Tweak the style of B::Deparse's output. The letters should follow |
6741 | directly after the 's', with no space or punctuation. The following | |
f4a44678 | 6742 | options are available: |
9d2c6865 SM |
6743 | |
6744 | =over 4 | |
6745 | ||
6746 | =item B<C> | |
6747 | ||
d4963d04 | 6748 | Cuddle C<elsif>, C<else>, and C<continue> blocks. For example, print |
9d2c6865 SM |
6749 | |
6750 | if (...) { | |
6751 | ... | |
6752 | } else { | |
6753 | ... | |
6754 | } | |
6755 | ||
6756 | instead of | |
6757 | ||
6758 | if (...) { | |
6759 | ... | |
6760 | } | |
6761 | else { | |
6762 | ... | |
6763 | } | |
6764 | ||
6765 | The default is not to cuddle. | |
6766 | ||
f4a44678 SM |
6767 | =item B<i>I<NUMBER> |
6768 | ||
d4963d04 | 6769 | Indent lines by multiples of I<NUMBER> columns. The default is 4 columns. |
f4a44678 SM |
6770 | |
6771 | =item B<T> | |
6772 | ||
d4963d04 | 6773 | Use tabs for each 8 columns of indent. The default is to use only spaces. |
f4a44678 SM |
6774 | For instance, if the style options are B<-si4T>, a line that's indented |
6775 | 3 times will be preceded by one tab and four spaces; if the options were | |
6776 | B<-si8T>, the same line would be preceded by three tabs. | |
6777 | ||
6778 | =item B<v>I<STRING>B<.> | |
6779 | ||
6780 | Print I<STRING> for the value of a constant that can't be determined | |
6781 | because it was optimized away (mnemonic: this happens when a constant | |
d4963d04 | 6782 | is used in B<v>oid context). The end of the string is marked by a period. |
f4a44678 SM |
6783 | The string should be a valid perl expression, generally a constant. |
6784 | Note that unless it's a number, it probably needs to be quoted, and on | |
d4963d04 | 6785 | a command line quotes need to be protected from the shell. Some |
f4a44678 SM |
6786 | conventional values include 0, 1, 42, '', 'foo', and |
6787 | 'Useless use of constant omitted' (which may need to be | |
6788 | B<-sv"'Useless use of constant omitted'."> | |
d4963d04 | 6789 | or something similar depending on your shell). The default is '???'. |
f4a44678 SM |
6790 | If you're using B::Deparse on a module or other file that's require'd, |
6791 | you shouldn't use a value that evaluates to false, since the customary | |
6792 | true constant at the end of a module will be in void context when the | |
6793 | file is compiled as a main program. | |
6794 | ||
9d2c6865 SM |
6795 | =back |
6796 | ||
58cccf98 SM |
6797 | =item B<-x>I<LEVEL> |
6798 | ||
6799 | Expand conventional syntax constructions into equivalent ones that expose | |
d4963d04 FC |
6800 | their internal operation. I<LEVEL> should be a digit, with higher values |
6801 | meaning more expansion. As with B<-q>, this actually involves turning off | |
58cccf98 SM |
6802 | special cases in B::Deparse's normal operations. |
6803 | ||
d989cdac | 6804 | If I<LEVEL> is at least 3, C<for> loops will be translated into equivalent |
646bba82 | 6805 | while loops with continue blocks; for instance |
58cccf98 SM |
6806 | |
6807 | for ($i = 0; $i < 10; ++$i) { | |
6808 | print $i; | |
6809 | } | |
6810 | ||
6811 | turns into | |
6812 | ||
6813 | $i = 0; | |
6814 | while ($i < 10) { | |
6815 | print $i; | |
6816 | } continue { | |
6817 | ++$i | |
6818 | } | |
6819 | ||
6820 | Note that in a few cases this translation can't be perfectly carried back | |
646bba82 | 6821 | into the source code -- if the loop's initializer declares a my variable, |
58cccf98 SM |
6822 | for instance, it won't have the correct scope outside of the loop. |
6823 | ||
d989cdac SM |
6824 | If I<LEVEL> is at least 5, C<use> declarations will be translated into |
6825 | C<BEGIN> blocks containing calls to C<require> and C<import>; for | |
6826 | instance, | |
6827 | ||
6828 | use strict 'refs'; | |
6829 | ||
6830 | turns into | |
6831 | ||
6832 | sub BEGIN { | |
6833 | require strict; | |
6834 | do { | |
6835 | 'strict'->import('refs') | |
6836 | }; | |
6837 | } | |
6838 | ||
6839 | If I<LEVEL> is at least 7, C<if> statements will be translated into | |
6840 | equivalent expressions using C<&&>, C<?:> and C<do {}>; for instance | |
58cccf98 SM |
6841 | |
6842 | print 'hi' if $nice; | |
6843 | if ($nice) { | |
6844 | print 'hi'; | |
6845 | } | |
6846 | if ($nice) { | |
6847 | print 'hi'; | |
6848 | } else { | |
6849 | print 'bye'; | |
6850 | } | |
6851 | ||
6852 | turns into | |
6853 | ||
6854 | $nice and print 'hi'; | |
6855 | $nice and do { print 'hi' }; | |
6856 | $nice ? do { print 'hi' } : do { print 'bye' }; | |
6857 | ||
6858 | Long sequences of elsifs will turn into nested ternary operators, which | |
6859 | B::Deparse doesn't know how to indent nicely. | |
6860 | ||
f6f9bdb7 SM |
6861 | =back |
6862 | ||
f4a44678 SM |
6863 | =head1 USING B::Deparse AS A MODULE |
6864 | ||
6865 | =head2 Synopsis | |
6866 | ||
6867 | use B::Deparse; | |
6868 | $deparse = B::Deparse->new("-p", "-sC"); | |
6869 | $body = $deparse->coderef2text(\&func); | |
6870 | eval "sub func $body"; # the inverse operation | |
6871 | ||
6872 | =head2 Description | |
6873 | ||
6874 | B::Deparse can also be used on a sub-by-sub basis from other perl | |
6875 | programs. | |
6876 | ||
6877 | =head2 new | |
6878 | ||
6879 | $deparse = B::Deparse->new(OPTIONS) | |
6880 | ||
6881 | Create an object to store the state of a deparsing operation and any | |
d4963d04 | 6882 | options. The options are the same as those that can be given on the |
f4a44678 | 6883 | command line (see L</OPTIONS>); options that are separated by commas |
7a07078a | 6884 | after B<-MO=Deparse> should be given as separate strings. |
f4a44678 | 6885 | |
08c6f5ec RH |
6886 | =head2 ambient_pragmas |
6887 | ||
bc6b2ef6 | 6888 | $deparse->ambient_pragmas(strict => 'all', '$[' => $[); |
08c6f5ec RH |
6889 | |
6890 | The compilation of a subroutine can be affected by a few compiler | |
d4963d04 | 6891 | directives, B<pragmas>. These are: |
08c6f5ec RH |
6892 | |
6893 | =over 4 | |
6894 | ||
6895 | =item * | |
6896 | ||
6897 | use strict; | |
6898 | ||
6899 | =item * | |
6900 | ||
6901 | use warnings; | |
6902 | ||
6903 | =item * | |
6904 | ||
bc6b2ef6 Z |
6905 | Assigning to the special variable $[ |
6906 | ||
6907 | =item * | |
6908 | ||
08c6f5ec RH |
6909 | use integer; |
6910 | ||
a0405c92 RH |
6911 | =item * |
6912 | ||
6913 | use bytes; | |
6914 | ||
6915 | =item * | |
6916 | ||
6917 | use utf8; | |
6918 | ||
6919 | =item * | |
6920 | ||
6921 | use re; | |
6922 | ||
08c6f5ec RH |
6923 | =back |
6924 | ||
6925 | Ordinarily, if you use B::Deparse on a subroutine which has | |
6926 | been compiled in the presence of one or more of these pragmas, | |
6927 | the output will include statements to turn on the appropriate | |
d4963d04 | 6928 | directives. So if you then compile the code returned by coderef2text, |
08c6f5ec RH |
6929 | it will behave the same way as the subroutine which you deparsed. |
6930 | ||
6931 | However, you may know that you intend to use the results in a | |
d4963d04 | 6932 | particular context, where some pragmas are already in scope. In |
08c6f5ec RH |
6933 | this case, you use the B<ambient_pragmas> method to describe the |
6934 | assumptions you wish to make. | |
6935 | ||
d4963d04 | 6936 | Not all of the options currently have any useful effect. See |
995e581f RH |
6937 | L</BUGS> for more details. |
6938 | ||
08c6f5ec RH |
6939 | The parameters it accepts are: |
6940 | ||
6941 | =over 4 | |
6942 | ||
6943 | =item strict | |
6944 | ||
6945 | Takes a string, possibly containing several values separated | |
d4963d04 | 6946 | by whitespace. The special values "all" and "none" mean what you'd |
08c6f5ec RH |
6947 | expect. |
6948 | ||
6949 | $deparse->ambient_pragmas(strict => 'subs refs'); | |
6950 | ||
bc6b2ef6 Z |
6951 | =item $[ |
6952 | ||
6953 | Takes a number, the value of the array base $[. | |
843835bc | 6954 | Obsolete: cannot be non-zero. |
bc6b2ef6 | 6955 | |
a0405c92 RH |
6956 | =item bytes |
6957 | ||
6958 | =item utf8 | |
6959 | ||
08c6f5ec RH |
6960 | =item integer |
6961 | ||
a0405c92 | 6962 | If the value is true, then the appropriate pragma is assumed to |
08c6f5ec RH |
6963 | be in the ambient scope, otherwise not. |
6964 | ||
a0405c92 RH |
6965 | =item re |
6966 | ||
6967 | Takes a string, possibly containing a whitespace-separated list of | |
d4963d04 | 6968 | values. The values "all" and "none" are special. It's also permissible |
a0405c92 RH |
6969 | to pass an array reference here. |
6970 | ||
6971 | $deparser->ambient_pragmas(re => 'eval'); | |
6972 | ||
6973 | ||
08c6f5ec RH |
6974 | =item warnings |
6975 | ||
6976 | Takes a string, possibly containing a whitespace-separated list of | |
d4963d04 | 6977 | values. The values "all" and "none" are special, again. It's also |
08c6f5ec RH |
6978 | permissible to pass an array reference here. |
6979 | ||
6980 | $deparser->ambient_pragmas(warnings => [qw[void io]]); | |
6981 | ||
6982 | If one of the values is the string "FATAL", then all the warnings | |
6983 | in that list will be considered fatal, just as with the B<warnings> | |
d4963d04 | 6984 | pragma itself. Should you need to specify that some warnings are |
08c6f5ec RH |
6985 | fatal, and others are merely enabled, you can pass the B<warnings> |
6986 | parameter twice: | |
6987 | ||
6988 | $deparser->ambient_pragmas( | |
6989 | warnings => 'all', | |
6990 | warnings => [FATAL => qw/void io/], | |
6991 | ); | |
6992 | ||
44ecbbd8 | 6993 | See L<warnings> for more information about lexical warnings. |
08c6f5ec RH |
6994 | |
6995 | =item hint_bits | |
6996 | ||
6997 | =item warning_bits | |
6998 | ||
6999 | These two parameters are used to specify the ambient pragmas in | |
7000 | the format used by the special variables $^H and ${^WARNING_BITS}. | |
7001 | ||
7002 | They exist principally so that you can write code like: | |
7003 | ||
7004 | { my ($hint_bits, $warning_bits); | |
7005 | BEGIN {($hint_bits, $warning_bits) = ($^H, ${^WARNING_BITS})} | |
7006 | $deparser->ambient_pragmas ( | |
7007 | hint_bits => $hint_bits, | |
7008 | warning_bits => $warning_bits, | |
bc6b2ef6 | 7009 | '$[' => 0 + $[ |
08c6f5ec RH |
7010 | ); } |
7011 | ||
7012 | which specifies that the ambient pragmas are exactly those which | |
7013 | are in scope at the point of calling. | |
7014 | ||
0ced6c29 RGS |
7015 | =item %^H |
7016 | ||
7017 | This parameter is used to specify the ambient pragmas which are | |
7018 | stored in the special hash %^H. | |
7019 | ||
08c6f5ec RH |
7020 | =back |
7021 | ||
f4a44678 SM |
7022 | =head2 coderef2text |
7023 | ||
7024 | $body = $deparse->coderef2text(\&func) | |
7025 | $body = $deparse->coderef2text(sub ($$) { ... }) | |
7026 | ||
7027 | Return source code for the body of a subroutine (a block, optionally | |
7028 | preceded by a prototype in parens), given a reference to the | |
d4963d04 | 7029 | sub. Because a subroutine can have no names, or more than one name, |
f4a44678 SM |
7030 | this method doesn't return a complete subroutine definition -- if you |
7031 | want to eval the result, you should prepend "sub subname ", or "sub " | |
d4963d04 | 7032 | for an anonymous function constructor. Unless the sub was defined in |
f4a44678 SM |
7033 | the main:: package, the code will include a package declaration. |
7034 | ||
f6f9bdb7 SM |
7035 | =head1 BUGS |
7036 | ||
995e581f RH |
7037 | =over 4 |
7038 | ||
7039 | =item * | |
7040 | ||
843835bc | 7041 | The only pragmas to |
65eb3922 | 7042 | be completely supported are: C<use warnings>, |
b1b6de96 | 7043 | C<use strict>, C<use bytes>, C<use integer> |
843835bc | 7044 | and C<use feature>. |
995e581f RH |
7045 | |
7046 | Excepting those listed above, we're currently unable to guarantee that | |
7047 | B::Deparse will produce a pragma at the correct point in the program. | |
d989cdac SM |
7048 | (Specifically, pragmas at the beginning of a block often appear right |
7049 | before the start of the block instead.) | |
995e581f RH |
7050 | Since the effects of pragmas are often lexically scoped, this can mean |
7051 | that the pragma holds sway over a different portion of the program | |
7052 | than in the input file. | |
7053 | ||
7054 | =item * | |
7055 | ||
c7f67cde RH |
7056 | In fact, the above is a specific instance of a more general problem: |
7057 | we can't guarantee to produce BEGIN blocks or C<use> declarations in | |
d4963d04 | 7058 | exactly the right place. So if you use a module which affects compilation |
c7f67cde RH |
7059 | (such as by over-riding keywords, overloading constants or whatever) |
7060 | then the output code might not work as intended. | |
7061 | ||
c7f67cde RH |
7062 | =item * |
7063 | ||
d989cdac SM |
7064 | Some constants don't print correctly either with or without B<-d>. |
7065 | For instance, neither B::Deparse nor Data::Dumper know how to print | |
7066 | dual-valued scalars correctly, as in: | |
b7dad2dc | 7067 | |
d989cdac | 7068 | use constant E2BIG => ($!=7); $y = E2BIG; print $y, 0+$y; |
b7dad2dc | 7069 | |
227375e1 RU |
7070 | use constant H => { "#" => 1 }; H->{"#"}; |
7071 | ||
2a9e2f8a RH |
7072 | =item * |
7073 | ||
7074 | An input file that uses source filtering probably won't be deparsed into | |
7075 | runnable code, because it will still include the B<use> declaration | |
7076 | for the source filtering module, even though the code that is | |
7077 | produced is already ordinary Perl which shouldn't be filtered again. | |
7078 | ||
7079 | =item * | |
7080 | ||
e5fbaf13 | 7081 | Optimized-away statements are rendered as |
d4963d04 | 7082 | '???'. This includes statements that |
b64ba24c RGS |
7083 | have a compile-time side-effect, such as the obscure |
7084 | ||
7085 | my $x if 0; | |
7086 | ||
7087 | which is not, consequently, deparsed correctly. | |
7088 | ||
227375e1 RU |
7089 | foreach my $i (@_) { 0 } |
7090 | => | |
7091 | foreach my $i (@_) { '???' } | |
7092 | ||
b64ba24c RGS |
7093 | =item * |
7094 | ||
8c1e32d8 | 7095 | Lexical (my) variables declared in scopes external to a subroutine |
bc304ab2 | 7096 | appear in coderef2text output text as package variables. This is a tricky |
c4a6f826 | 7097 | problem, as perl has no native facility for referring to a lexical variable |
8c1e32d8 DN |
7098 | defined within a different scope, although L<PadWalker> is a good start. |
7099 | ||
4e3643b4 FC |
7100 | See also L<Data::Dump::Streamer>, which combines B::Deparse and |
7101 | L<PadWalker> to serialize closures properly. | |
7102 | ||
8c1e32d8 DN |
7103 | =item * |
7104 | ||
2a9e2f8a RH |
7105 | There are probably many more bugs on non-ASCII platforms (EBCDIC). |
7106 | ||
995e581f | 7107 | =back |
f6f9bdb7 SM |
7108 | |
7109 | =head1 AUTHOR | |
7110 | ||
d989cdac SM |
7111 | Stephen McCamant <smcc@CSUA.Berkeley.EDU>, based on an earlier version |
7112 | by Malcolm Beattie <mbeattie@sable.ox.ac.uk>, with contributions from | |
7113 | Gisle Aas, James Duncan, Albert Dvornik, Robin Houston, Dave Mitchell, | |
7114 | Hugo van der Sanden, Gurusamy Sarathy, Nick Ing-Simmons, and Rafael | |
7115 | Garcia-Suarez. | |
f6f9bdb7 SM |
7116 | |
7117 | =cut |