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6e90668e | 1 | # B::Deparse.pm |
6f611a1a | 2 | # Copyright (c) 1998, 1999, 2000 Stephen McCamant. All rights reserved. |
6e90668e SM |
3 | # This module is free software; you can redistribute and/or modify |
4 | # it under the same terms as Perl itself. | |
5 | ||
6 | # This is based on the module of the same name by Malcolm Beattie, | |
7 | # but essentially none of his code remains. | |
8 | ||
a798dbf2 | 9 | package B::Deparse; |
ff97752d | 10 | use Carp; |
51a5edaf | 11 | use B qw(class main_root main_start main_cv svref_2object opnumber perlstring |
bd0865ec | 12 | OPf_WANT OPf_WANT_VOID OPf_WANT_SCALAR OPf_WANT_LIST |
90c0eb26 | 13 | OPf_KIDS OPf_REF OPf_STACKED OPf_SPECIAL OPf_MOD |
ce4e655d | 14 | OPpLVAL_INTRO OPpOUR_INTRO OPpENTERSUB_AMPER OPpSLICE OPpCONST_BARE |
3ed82cfc | 15 | OPpTRANS_SQUASH OPpTRANS_DELETE OPpTRANS_COMPLEMENT OPpTARGET_MY |
7e80da18 RH |
16 | OPpCONST_ARYBASE OPpEXISTS_SUB OPpSORT_NUMERIC OPpSORT_INTEGER |
17 | OPpSORT_REVERSE | |
ce4e655d | 18 | SVf_IOK SVf_NOK SVf_ROK SVf_POK SVpad_OUR |
6aaf4108 | 19 | CVf_METHOD CVf_LOCKED CVf_LVALUE |
fcd95d64 | 20 | PMf_KEEP PMf_GLOBAL PMf_CONTINUE PMf_EVAL PMf_ONCE PMf_SKIPWHITE |
bd0865ec | 21 | PMf_MULTILINE PMf_SINGLELINE PMf_FOLD PMf_EXTENDED); |
9a58b761 | 22 | $VERSION = 0.63; |
a798dbf2 | 23 | use strict; |
2ae48fff | 24 | use vars qw/$AUTOLOAD/; |
34a48b4b | 25 | use warnings (); |
a798dbf2 | 26 | |
6e90668e SM |
27 | # Changes between 0.50 and 0.51: |
28 | # - fixed nulled leave with live enter in sort { } | |
29 | # - fixed reference constants (\"str") | |
30 | # - handle empty programs gracefully | |
31 | # - handle infinte loops (for (;;) {}, while (1) {}) | |
32 | # - differentiate between `for my $x ...' and `my $x; for $x ...' | |
33 | # - various minor cleanups | |
34 | # - moved globals into an object | |
35 | # - added `-u', like B::C | |
36 | # - package declarations using cop_stash | |
37 | # - subs, formats and code sorted by cop_seq | |
f6f9bdb7 | 38 | # Changes between 0.51 and 0.52: |
4d1ff10f | 39 | # - added pp_threadsv (special variables under USE_5005THREADS) |
f6f9bdb7 | 40 | # - added documentation |
bd0865ec | 41 | # Changes between 0.52 and 0.53: |
9d2c6865 SM |
42 | # - many changes adding precedence contexts and associativity |
43 | # - added `-p' and `-s' output style options | |
44 | # - various other minor fixes | |
bd0865ec | 45 | # Changes between 0.53 and 0.54: |
d7f5b6da SM |
46 | # - added support for new `for (1..100)' optimization, |
47 | # thanks to Gisle Aas | |
bd0865ec | 48 | # Changes between 0.54 and 0.55: |
90be192f SM |
49 | # - added support for new qr// construct |
50 | # - added support for new pp_regcreset OP | |
bd0865ec | 51 | # Changes between 0.55 and 0.56: |
f5aa8f4e SM |
52 | # - tested on base/*.t, cmd/*.t, comp/*.t, io/*.t |
53 | # - fixed $# on non-lexicals broken in last big rewrite | |
54 | # - added temporary fix for change in opcode of OP_STRINGIFY | |
55 | # - fixed problem in 0.54's for() patch in `for (@ary)' | |
56 | # - fixed precedence in conditional of ?: | |
57 | # - tweaked list paren elimination in `my($x) = @_' | |
58 | # - made continue-block detection trickier wrt. null ops | |
59 | # - fixed various prototype problems in pp_entersub | |
60 | # - added support for sub prototypes that never get GVs | |
61 | # - added unquoting for special filehandle first arg in truncate | |
62 | # - print doubled rv2gv (a bug) as `*{*GV}' instead of illegal `**GV' | |
63 | # - added semicolons at the ends of blocks | |
64 | # - added -l `#line' declaration option -- fixes cmd/subval.t 27,28 | |
bd0865ec GS |
65 | # Changes between 0.56 and 0.561: |
66 | # - fixed multiply-declared my var in pp_truncate (thanks to Sarathy) | |
67 | # - used new B.pm symbolic constants (done by Nick Ing-Simmons) | |
68 | # Changes between 0.561 and 0.57: | |
69 | # - stylistic changes to symbolic constant stuff | |
70 | # - handled scope in s///e replacement code | |
71 | # - added unquote option for expanding "" into concats, etc. | |
72 | # - split method and proto parts of pp_entersub into separate functions | |
73 | # - various minor cleanups | |
f4a44678 SM |
74 | # Changes after 0.57: |
75 | # - added parens in \&foo (patch by Albert Dvornik) | |
76 | # Changes between 0.57 and 0.58: | |
77 | # - fixed `0' statements that weren't being printed | |
78 | # - added methods for use from other programs | |
79 | # (based on patches from James Duncan and Hugo van der Sanden) | |
80 | # - added -si and -sT to control indenting (also based on a patch from Hugo) | |
81 | # - added -sv to print something else instead of '???' | |
82 | # - preliminary version of utf8 tr/// handling | |
3ed82cfc GS |
83 | # Changes after 0.58: |
84 | # - uses of $op->ppaddr changed to new $op->name (done by Sarathy) | |
85 | # - added support for Hugo's new OP_SETSTATE (like nextstate) | |
86 | # Changes between 0.58 and 0.59 | |
87 | # - added support for Chip's OP_METHOD_NAMED | |
88 | # - added support for Ilya's OPpTARGET_MY optimization | |
89 | # - elided arrows before `()' subscripts when possible | |
58cccf98 SM |
90 | # Changes between 0.59 and 0.60 |
91 | # - support for method attribues was added | |
92 | # - some warnings fixed | |
93 | # - separate recognition of constant subs | |
94 | # - rewrote continue block handling, now recoginizing for loops | |
95 | # - added more control of expanding control structures | |
c7f67cde RH |
96 | # Changes between 0.60 and 0.61 (mostly by Robin Houston) |
97 | # - many bug-fixes | |
98 | # - support for pragmas and 'use' | |
99 | # - support for the little-used $[ variable | |
100 | # - support for __DATA__ sections | |
101 | # - UTF8 support | |
102 | # - BEGIN, CHECK, INIT and END blocks | |
103 | # - scoping of subroutine declarations fixed | |
104 | # - compile-time output from the input program can be suppressed, so that the | |
105 | # output is just the deparsed code. (a change to O.pm in fact) | |
106 | # - our() declarations | |
107 | # - *all* the known bugs are now listed in the BUGS section | |
108 | # - comprehensive test mechanism (TEST -deparse) | |
9a58b761 RGS |
109 | # Changes between 0.62 and 0.63 (mostly by Rafael Garcia-Suarez) |
110 | # - bug-fixes | |
111 | # - new switch -P | |
112 | # - support for command-line switches (-l, -0, etc.) | |
6e90668e SM |
113 | |
114 | # Todo: | |
2a9e2f8a RH |
115 | # (See also BUGS section at the end of this file) |
116 | # | |
f4a44678 SM |
117 | # - finish tr/// changes |
118 | # - add option for even more parens (generalize \&foo change) | |
90be192f | 119 | # - left/right context |
f4a44678 | 120 | # - treat top-level block specially for incremental output |
58cccf98 | 121 | # - copy comments (look at real text with $^P?) |
f5aa8f4e | 122 | # - avoid semis in one-statement blocks |
9d2c6865 | 123 | # - associativity of &&=, ||=, ?: |
6e90668e SM |
124 | # - ',' => '=>' (auto-unquote?) |
125 | # - break long lines ("\r" as discretionary break?) | |
f4a44678 SM |
126 | # - configurable syntax highlighting: ANSI color, HTML, TeX, etc. |
127 | # - more style options: brace style, hex vs. octal, quotes, ... | |
128 | # - print big ints as hex/octal instead of decimal (heuristic?) | |
3ed82cfc | 129 | # - handle `my $x if 0'? |
f5aa8f4e | 130 | # - coordinate with Data::Dumper (both directions? see previous) |
6e90668e SM |
131 | # - version using op_next instead of op_first/sibling? |
132 | # - avoid string copies (pass arrays, one big join?) | |
9d2c6865 | 133 | # - here-docs? |
6e90668e | 134 | |
f5aa8f4e | 135 | # Tests that will always fail: |
2a9e2f8a | 136 | # (see t/TEST for the short list) |
f5aa8f4e | 137 | |
6e90668e SM |
138 | # Object fields (were globals): |
139 | # | |
140 | # avoid_local: | |
141 | # (local($a), local($b)) and local($a, $b) have the same internal | |
142 | # representation but the short form looks better. We notice we can | |
143 | # use a large-scale local when checking the list, but need to prevent | |
144 | # individual locals too. This hash holds the addresses of OPs that | |
145 | # have already had their local-ness accounted for. The same thing | |
146 | # is done with my(). | |
147 | # | |
148 | # curcv: | |
149 | # CV for current sub (or main program) being deparsed | |
150 | # | |
8510e997 RH |
151 | # curcvlex: |
152 | # Cached hash of lexical variables for curcv: keys are names, | |
153 | # each value is an array of pairs, indicating the cop_seq of scopes | |
154 | # in which a var of that name is valid. | |
155 | # | |
34a48b4b RH |
156 | # curcop: |
157 | # COP for statement being deparsed | |
158 | # | |
6e90668e SM |
159 | # curstash: |
160 | # name of the current package for deparsed code | |
161 | # | |
162 | # subs_todo: | |
34a48b4b | 163 | # array of [cop_seq, CV, is_format?] for subs and formats we still |
6e90668e SM |
164 | # want to deparse |
165 | # | |
f5aa8f4e SM |
166 | # protos_todo: |
167 | # as above, but [name, prototype] for subs that never got a GV | |
168 | # | |
6e90668e SM |
169 | # subs_done, forms_done: |
170 | # keys are addresses of GVs for subs and formats we've already | |
171 | # deparsed (or at least put into subs_todo) | |
9d2c6865 | 172 | # |
0ca62a8e RH |
173 | # subs_declared |
174 | # keys are names of subs for which we've printed declarations. | |
175 | # That means we can omit parentheses from the arguments. | |
176 | # | |
1d38190f RGS |
177 | # subs_deparsed |
178 | # Keeps track of fully qualified names of all deparsed subs. | |
179 | # | |
9d2c6865 | 180 | # parens: -p |
f5aa8f4e | 181 | # linenums: -l |
bd0865ec | 182 | # unquote: -q |
9d2c6865 | 183 | # cuddle: ` ' or `\n', depending on -sC |
f4a44678 SM |
184 | # indent_size: -si |
185 | # use_tabs: -sT | |
186 | # ex_const: -sv | |
9d2c6865 SM |
187 | |
188 | # A little explanation of how precedence contexts and associativity | |
189 | # work: | |
190 | # | |
191 | # deparse() calls each per-op subroutine with an argument $cx (short | |
192 | # for context, but not the same as the cx* in the perl core), which is | |
193 | # a number describing the op's parents in terms of precedence, whether | |
f5aa8f4e | 194 | # they're inside an expression or at statement level, etc. (see |
9d2c6865 SM |
195 | # chart below). When ops with children call deparse on them, they pass |
196 | # along their precedence. Fractional values are used to implement | |
197 | # associativity (`($x + $y) + $z' => `$x + $y + $y') and related | |
198 | # parentheses hacks. The major disadvantage of this scheme is that | |
199 | # it doesn't know about right sides and left sides, so say if you | |
200 | # assign a listop to a variable, it can't tell it's allowed to leave | |
201 | # the parens off the listop. | |
202 | ||
203 | # Precedences: | |
204 | # 26 [TODO] inside interpolation context ("") | |
205 | # 25 left terms and list operators (leftward) | |
206 | # 24 left -> | |
207 | # 23 nonassoc ++ -- | |
208 | # 22 right ** | |
209 | # 21 right ! ~ \ and unary + and - | |
210 | # 20 left =~ !~ | |
211 | # 19 left * / % x | |
212 | # 18 left + - . | |
213 | # 17 left << >> | |
214 | # 16 nonassoc named unary operators | |
215 | # 15 nonassoc < > <= >= lt gt le ge | |
216 | # 14 nonassoc == != <=> eq ne cmp | |
217 | # 13 left & | |
218 | # 12 left | ^ | |
219 | # 11 left && | |
220 | # 10 left || | |
221 | # 9 nonassoc .. ... | |
222 | # 8 right ?: | |
223 | # 7 right = += -= *= etc. | |
224 | # 6 left , => | |
225 | # 5 nonassoc list operators (rightward) | |
226 | # 4 right not | |
227 | # 3 left and | |
228 | # 2 left or xor | |
229 | # 1 statement modifiers | |
230 | # 0 statement level | |
231 | ||
6ec152c3 RH |
232 | # Also, lineseq may pass a fourth parameter to the pp_ routines: |
233 | # if present, the fourth parameter is passed on by deparse. | |
234 | # | |
235 | # If present and true, it means that the op exists directly as | |
ce4e655d | 236 | # part of a lineseq. Currently it's only used by scopeop to |
6ec152c3 RH |
237 | # decide whether its results need to be enclosed in a do {} block. |
238 | ||
9d2c6865 SM |
239 | # Nonprinting characters with special meaning: |
240 | # \cS - steal parens (see maybe_parens_unop) | |
241 | # \n - newline and indent | |
242 | # \t - increase indent | |
243 | # \b - decrease indent (`outdent') | |
f5aa8f4e | 244 | # \f - flush left (no indent) |
9d2c6865 | 245 | # \cK - kill following semicolon, if any |
6e90668e SM |
246 | |
247 | sub null { | |
248 | my $op = shift; | |
249 | return class($op) eq "NULL"; | |
250 | } | |
251 | ||
252 | sub todo { | |
253 | my $self = shift; | |
34a48b4b | 254 | my($cv, $is_form) = @_; |
e31885a0 | 255 | return unless ($cv->FILE eq $0 || exists $self->{files}{$cv->FILE}); |
6e90668e SM |
256 | my $seq; |
257 | if (!null($cv->START) and is_state($cv->START)) { | |
258 | $seq = $cv->START->cop_seq; | |
259 | } else { | |
260 | $seq = 0; | |
261 | } | |
34a48b4b | 262 | push @{$self->{'subs_todo'}}, [$seq, $cv, $is_form]; |
1d38190f RGS |
263 | unless ($is_form || class($cv->STASH) eq 'SPECIAL') { |
264 | $self->{'subs_deparsed'}{$cv->STASH->NAME."::".$cv->GV->NAME} = 1; | |
265 | } | |
6e90668e SM |
266 | } |
267 | ||
268 | sub next_todo { | |
269 | my $self = shift; | |
270 | my $ent = shift @{$self->{'subs_todo'}}; | |
34a48b4b RH |
271 | my $cv = $ent->[1]; |
272 | my $gv = $cv->GV; | |
273 | my $name = $self->gv_name($gv); | |
6e90668e SM |
274 | if ($ent->[2]) { |
275 | return "format $name =\n" | |
e31885a0 | 276 | . $self->deparse_format($ent->[1]). "\n"; |
6e90668e | 277 | } else { |
0ca62a8e | 278 | $self->{'subs_declared'}{$name} = 1; |
34a48b4b RH |
279 | if ($name eq "BEGIN") { |
280 | my $use_dec = $self->begin_is_use($cv); | |
0e7fe0f0 RH |
281 | if (defined ($use_dec)) { |
282 | return () if 0 == length($use_dec); | |
283 | return $use_dec; | |
284 | } | |
34a48b4b | 285 | } |
a0035eb8 RH |
286 | my $l = ''; |
287 | if ($self->{'linenums'}) { | |
288 | my $line = $gv->LINE; | |
289 | my $file = $gv->FILE; | |
290 | $l = "\n\f#line $line \"$file\"\n"; | |
291 | } | |
292 | return "${l}sub $name " . $self->deparse_sub($cv); | |
34a48b4b RH |
293 | } |
294 | } | |
295 | ||
296 | # Return a "use" declaration for this BEGIN block, if appropriate | |
297 | sub begin_is_use { | |
298 | my ($self, $cv) = @_; | |
299 | my $root = $cv->ROOT; | |
80dc0729 | 300 | local @$self{qw'curcv curcvlex'} = ($cv); |
34a48b4b RH |
301 | #require B::Debug; |
302 | #B::walkoptree($cv->ROOT, "debug"); | |
303 | my $lineseq = $root->first; | |
304 | return if $lineseq->name ne "lineseq"; | |
305 | ||
306 | my $req_op = $lineseq->first->sibling; | |
307 | return if $req_op->name ne "require"; | |
308 | ||
309 | my $module; | |
310 | if ($req_op->first->private & OPpCONST_BARE) { | |
311 | # Actually it should always be a bareword | |
312 | $module = $self->const_sv($req_op->first)->PV; | |
313 | $module =~ s[/][::]g; | |
314 | $module =~ s/.pm$//; | |
315 | } | |
316 | else { | |
317 | $module = const($self->const_sv($req_op->first)); | |
318 | } | |
319 | ||
320 | my $version; | |
321 | my $version_op = $req_op->sibling; | |
322 | return if class($version_op) eq "NULL"; | |
323 | if ($version_op->name eq "lineseq") { | |
324 | # We have a version parameter; skip nextstate & pushmark | |
325 | my $constop = $version_op->first->next->next; | |
326 | ||
327 | return unless $self->const_sv($constop)->PV eq $module; | |
328 | $constop = $constop->sibling; | |
34a48b4b RH |
329 | $version = $self->const_sv($constop)->int_value; |
330 | $constop = $constop->sibling; | |
331 | return if $constop->name ne "method_named"; | |
332 | return if $self->const_sv($constop)->PV ne "VERSION"; | |
333 | } | |
334 | ||
335 | $lineseq = $version_op->sibling; | |
336 | return if $lineseq->name ne "lineseq"; | |
337 | my $entersub = $lineseq->first->sibling; | |
338 | if ($entersub->name eq "stub") { | |
339 | return "use $module $version ();\n" if defined $version; | |
340 | return "use $module ();\n"; | |
341 | } | |
342 | return if $entersub->name ne "entersub"; | |
343 | ||
344 | # See if there are import arguments | |
345 | my $args = ''; | |
346 | ||
6ec152c3 RH |
347 | my $svop = $entersub->first->sibling; # Skip over pushmark |
348 | return unless $self->const_sv($svop)->PV eq $module; | |
34a48b4b RH |
349 | |
350 | # Pull out the arguments | |
6ec152c3 RH |
351 | for ($svop=$svop->sibling; $svop->name ne "method_named"; |
352 | $svop = $svop->sibling) { | |
34a48b4b | 353 | $args .= ", " if length($args); |
6ec152c3 | 354 | $args .= $self->deparse($svop, 6); |
34a48b4b RH |
355 | } |
356 | ||
357 | my $use = 'use'; | |
6ec152c3 | 358 | my $method_named = $svop; |
34a48b4b RH |
359 | return if $method_named->name ne "method_named"; |
360 | my $method_name = $self->const_sv($method_named)->PV; | |
361 | ||
362 | if ($method_name eq "unimport") { | |
363 | $use = 'no'; | |
364 | } | |
365 | ||
366 | # Certain pragmas are dealt with using hint bits, | |
367 | # so we ignore them here | |
368 | if ($module eq 'strict' || $module eq 'integer' | |
0e7fe0f0 | 369 | || $module eq 'bytes' || $module eq 'warnings') { |
34a48b4b RH |
370 | return ""; |
371 | } | |
372 | ||
373 | if (defined $version && length $args) { | |
374 | return "$use $module $version ($args);\n"; | |
375 | } elsif (defined $version) { | |
376 | return "$use $module $version;\n"; | |
377 | } elsif (length $args) { | |
378 | return "$use $module ($args);\n"; | |
379 | } else { | |
380 | return "$use $module;\n"; | |
6e90668e SM |
381 | } |
382 | } | |
383 | ||
6e90668e | 384 | sub stash_subs { |
34a48b4b RH |
385 | my ($self, $pack) = @_; |
386 | my (@ret, $stash); | |
387 | if (!defined $pack) { | |
388 | $pack = ''; | |
389 | $stash = \%::; | |
f5aa8f4e | 390 | } |
34a48b4b RH |
391 | else { |
392 | $pack =~ s/(::)?$/::/; | |
393 | no strict 'refs'; | |
394 | $stash = \%$pack; | |
395 | } | |
396 | my %stash = svref_2object($stash)->ARRAY; | |
397 | while (my ($key, $val) = each %stash) { | |
398 | next if $key eq 'main::'; # avoid infinite recursion | |
f5aa8f4e SM |
399 | my $class = class($val); |
400 | if ($class eq "PV") { | |
a0035eb8 RH |
401 | # Just a prototype. As an ugly but fairly effective way |
402 | # to find out if it belongs here is to see if the AUTOLOAD | |
403 | # (if any) for the stash was defined in one of our files. | |
404 | my $A = $stash{"AUTOLOAD"}; | |
405 | if (defined ($A) && class($A) eq "GV" && defined($A->CV) | |
406 | && class($A->CV) eq "CV") { | |
407 | my $AF = $A->FILE; | |
408 | next unless $AF eq $0 || exists $self->{'files'}{$AF}; | |
409 | } | |
f5aa8f4e SM |
410 | push @{$self->{'protos_todo'}}, [$pack . $key, $val->PV]; |
411 | } elsif ($class eq "IV") { | |
a0035eb8 RH |
412 | # Just a name. As above. |
413 | my $A = $stash{"AUTOLOAD"}; | |
414 | if (defined ($A) && class($A) eq "GV" && defined($A->CV) | |
415 | && class($A->CV) eq "CV") { | |
416 | my $AF = $A->FILE; | |
417 | next unless $AF eq $0 || exists $self->{'files'}{$AF}; | |
418 | } | |
f5aa8f4e SM |
419 | push @{$self->{'protos_todo'}}, [$pack . $key, undef]; |
420 | } elsif ($class eq "GV") { | |
34a48b4b | 421 | if (class(my $cv = $val->CV) ne "SPECIAL") { |
f5aa8f4e | 422 | next if $self->{'subs_done'}{$$val}++; |
e31885a0 | 423 | next if $$val != ${$cv->GV}; # Ignore imposters |
8510e997 | 424 | $self->todo($cv, 0); |
f5aa8f4e | 425 | } |
e31885a0 | 426 | if (class(my $cv = $val->FORM) ne "SPECIAL") { |
f5aa8f4e | 427 | next if $self->{'forms_done'}{$$val}++; |
e31885a0 RH |
428 | next if $$val != ${$cv->GV}; # Ignore imposters |
429 | $self->todo($cv, 1); | |
f5aa8f4e | 430 | } |
34a48b4b RH |
431 | if (class($val->HV) ne "SPECIAL" && $key =~ /::$/) { |
432 | $self->stash_subs($pack . $key); | |
433 | } | |
6e90668e SM |
434 | } |
435 | } | |
436 | } | |
a798dbf2 | 437 | |
f5aa8f4e SM |
438 | sub print_protos { |
439 | my $self = shift; | |
440 | my $ar; | |
441 | my @ret; | |
442 | foreach $ar (@{$self->{'protos_todo'}}) { | |
443 | my $proto = (defined $ar->[1] ? " (". $ar->[1] . ")" : ""); | |
444 | push @ret, "sub " . $ar->[0] . "$proto;\n"; | |
445 | } | |
446 | delete $self->{'protos_todo'}; | |
447 | return @ret; | |
448 | } | |
449 | ||
9d2c6865 SM |
450 | sub style_opts { |
451 | my $self = shift; | |
452 | my $opts = shift; | |
453 | my $opt; | |
454 | while (length($opt = substr($opts, 0, 1))) { | |
455 | if ($opt eq "C") { | |
456 | $self->{'cuddle'} = " "; | |
f4a44678 SM |
457 | $opts = substr($opts, 1); |
458 | } elsif ($opt eq "i") { | |
459 | $opts =~ s/^i(\d+)//; | |
460 | $self->{'indent_size'} = $1; | |
461 | } elsif ($opt eq "T") { | |
462 | $self->{'use_tabs'} = 1; | |
463 | $opts = substr($opts, 1); | |
464 | } elsif ($opt eq "v") { | |
465 | $opts =~ s/^v([^.]*)(.|$)//; | |
466 | $self->{'ex_const'} = $1; | |
9d2c6865 | 467 | } |
9d2c6865 SM |
468 | } |
469 | } | |
470 | ||
f4a44678 SM |
471 | sub new { |
472 | my $class = shift; | |
473 | my $self = bless {}, $class; | |
474 | $self->{'subs_todo'} = []; | |
34a48b4b | 475 | $self->{'files'} = {}; |
f4a44678 | 476 | $self->{'curstash'} = "main"; |
34a48b4b | 477 | $self->{'curcop'} = undef; |
f4a44678 SM |
478 | $self->{'cuddle'} = "\n"; |
479 | $self->{'indent_size'} = 4; | |
480 | $self->{'use_tabs'} = 0; | |
793e2a70 RH |
481 | $self->{'expand'} = 0; |
482 | $self->{'unquote'} = 0; | |
483 | $self->{'linenums'} = 0; | |
484 | $self->{'parens'} = 0; | |
f4a44678 | 485 | $self->{'ex_const'} = "'???'"; |
08c6f5ec RH |
486 | |
487 | $self->{'ambient_arybase'} = 0; | |
e31885a0 | 488 | $self->{'ambient_warnings'} = undef; # Assume no lexical warnings |
a0405c92 | 489 | $self->{'ambient_hints'} = 0; |
08c6f5ec RH |
490 | $self->init(); |
491 | ||
f4a44678 | 492 | while (my $arg = shift @_) { |
34a48b4b RH |
493 | if ($arg =~ /^-f(.*)/) { |
494 | $self->{'files'}{$1} = 1; | |
f4a44678 SM |
495 | } elsif ($arg eq "-p") { |
496 | $self->{'parens'} = 1; | |
acaaef34 RGS |
497 | } elsif ($arg eq "-P") { |
498 | $self->{'noproto'} = 1; | |
f4a44678 SM |
499 | } elsif ($arg eq "-l") { |
500 | $self->{'linenums'} = 1; | |
501 | } elsif ($arg eq "-q") { | |
502 | $self->{'unquote'} = 1; | |
503 | } elsif (substr($arg, 0, 2) eq "-s") { | |
504 | $self->style_opts(substr $arg, 2); | |
58cccf98 SM |
505 | } elsif ($arg =~ /^-x(\d)$/) { |
506 | $self->{'expand'} = $1; | |
f4a44678 SM |
507 | } |
508 | } | |
509 | return $self; | |
510 | } | |
511 | ||
810aef70 RH |
512 | { |
513 | # Mask out the bits that L<warnings::register> uses | |
514 | my $WARN_MASK; | |
515 | BEGIN { | |
516 | $WARN_MASK = $warnings::Bits{all} | $warnings::DeadBits{all}; | |
517 | } | |
518 | sub WARN_MASK () { | |
519 | return $WARN_MASK; | |
520 | } | |
34a48b4b RH |
521 | } |
522 | ||
08c6f5ec RH |
523 | # Initialise the contextual information, either from |
524 | # defaults provided with the ambient_pragmas method, | |
525 | # or from perl's own defaults otherwise. | |
526 | sub init { | |
527 | my $self = shift; | |
528 | ||
529 | $self->{'arybase'} = $self->{'ambient_arybase'}; | |
e31885a0 RH |
530 | $self->{'warnings'} = defined ($self->{'ambient_warnings'}) |
531 | ? $self->{'ambient_warnings'} & WARN_MASK | |
532 | : undef; | |
a0405c92 | 533 | $self->{'hints'} = $self->{'ambient_hints'} & 0xFF; |
217aba5d RH |
534 | |
535 | # also a convenient place to clear out subs_declared | |
536 | delete $self->{'subs_declared'}; | |
08c6f5ec RH |
537 | } |
538 | ||
a798dbf2 | 539 | sub compile { |
6e90668e SM |
540 | my(@args) = @_; |
541 | return sub { | |
f4a44678 | 542 | my $self = B::Deparse->new(@args); |
d2bc402e RGS |
543 | # First deparse command-line args |
544 | if (defined $^I) { # deparse -i | |
51a5edaf | 545 | print q(BEGIN { $^I = ).perlstring($^I).qq(; }\n); |
d2bc402e RGS |
546 | } |
547 | if ($^W) { # deparse -w | |
548 | print qq(BEGIN { \$^W = $^W; }\n); | |
549 | } | |
550 | if ($/ ne "\n" or defined $O::savebackslash) { # deparse -l and -0 | |
51a5edaf RGS |
551 | my $fs = perlstring($/) || 'undef'; |
552 | my $bs = perlstring($O::savebackslash) || 'undef'; | |
d2bc402e RGS |
553 | print qq(BEGIN { \$/ = $fs; \$\\ = $bs; }\n); |
554 | } | |
34a48b4b RH |
555 | my @BEGINs = B::begin_av->isa("B::AV") ? B::begin_av->ARRAY : (); |
556 | my @INITs = B::init_av->isa("B::AV") ? B::init_av->ARRAY : (); | |
557 | my @ENDs = B::end_av->isa("B::AV") ? B::end_av->ARRAY : (); | |
558 | for my $block (@BEGINs, @INITs, @ENDs) { | |
e31885a0 | 559 | $self->todo($block, 0); |
34a48b4b RH |
560 | } |
561 | $self->stash_subs(); | |
6e90668e | 562 | $self->{'curcv'} = main_cv; |
8510e997 | 563 | $self->{'curcvlex'} = undef; |
f5aa8f4e | 564 | print $self->print_protos; |
6e90668e | 565 | @{$self->{'subs_todo'}} = |
f4a44678 SM |
566 | sort {$a->[0] <=> $b->[0]} @{$self->{'subs_todo'}}; |
567 | print $self->indent($self->deparse(main_root, 0)), "\n" | |
568 | unless null main_root; | |
6e90668e SM |
569 | my @text; |
570 | while (scalar(@{$self->{'subs_todo'}})) { | |
571 | push @text, $self->next_todo; | |
572 | } | |
6f611a1a | 573 | print $self->indent(join("", @text)), "\n" if @text; |
e31885a0 RH |
574 | |
575 | # Print __DATA__ section, if necessary | |
576 | no strict 'refs'; | |
96c57f7e RGS |
577 | my $laststash = defined $self->{'curcop'} |
578 | ? $self->{'curcop'}->stash->NAME : $self->{'curstash'}; | |
579 | if (defined *{$laststash."::DATA"}{IO}) { | |
e31885a0 | 580 | print "__DATA__\n"; |
96c57f7e | 581 | print readline(*{$laststash."::DATA"}); |
e31885a0 | 582 | } |
a798dbf2 | 583 | } |
a798dbf2 MB |
584 | } |
585 | ||
f4a44678 SM |
586 | sub coderef2text { |
587 | my $self = shift; | |
588 | my $sub = shift; | |
589 | croak "Usage: ->coderef2text(CODEREF)" unless ref($sub) eq "CODE"; | |
08c6f5ec RH |
590 | |
591 | $self->init(); | |
f4a44678 SM |
592 | return $self->indent($self->deparse_sub(svref_2object($sub))); |
593 | } | |
594 | ||
08c6f5ec RH |
595 | sub ambient_pragmas { |
596 | my $self = shift; | |
e31885a0 | 597 | my ($arybase, $hint_bits, $warning_bits) = (0, 0); |
08c6f5ec RH |
598 | |
599 | while (@_ > 1) { | |
600 | my $name = shift(); | |
601 | my $val = shift(); | |
602 | ||
603 | if ($name eq 'strict') { | |
604 | require strict; | |
605 | ||
606 | if ($val eq 'none') { | |
607 | $hint_bits &= ~strict::bits(qw/refs subs vars/); | |
608 | next(); | |
609 | } | |
610 | ||
611 | my @names; | |
612 | if ($val eq "all") { | |
613 | @names = qw/refs subs vars/; | |
614 | } | |
615 | elsif (ref $val) { | |
616 | @names = @$val; | |
617 | } | |
618 | else { | |
a0405c92 | 619 | @names = split' ', $val; |
08c6f5ec RH |
620 | } |
621 | $hint_bits |= strict::bits(@names); | |
622 | } | |
623 | ||
624 | elsif ($name eq '$[') { | |
625 | $arybase = $val; | |
626 | } | |
627 | ||
a0405c92 RH |
628 | elsif ($name eq 'integer' |
629 | || $name eq 'bytes' | |
630 | || $name eq 'utf8') { | |
631 | require "$name.pm"; | |
08c6f5ec | 632 | if ($val) { |
a0405c92 RH |
633 | $hint_bits |= ${$::{"${name}::"}{"hint_bits"}}; |
634 | } | |
635 | else { | |
636 | $hint_bits &= ~${$::{"${name}::"}{"hint_bits"}}; | |
637 | } | |
638 | } | |
639 | ||
640 | elsif ($name eq 're') { | |
641 | require re; | |
642 | if ($val eq 'none') { | |
2570cdf1 | 643 | $hint_bits &= ~re::bits(qw/taint eval/); |
a0405c92 RH |
644 | next(); |
645 | } | |
646 | ||
647 | my @names; | |
648 | if ($val eq 'all') { | |
2570cdf1 | 649 | @names = qw/taint eval/; |
a0405c92 RH |
650 | } |
651 | elsif (ref $val) { | |
652 | @names = @$val; | |
08c6f5ec RH |
653 | } |
654 | else { | |
a0405c92 | 655 | @names = split' ',$val; |
08c6f5ec | 656 | } |
a0405c92 | 657 | $hint_bits |= re::bits(@names); |
08c6f5ec RH |
658 | } |
659 | ||
660 | elsif ($name eq 'warnings') { | |
08c6f5ec | 661 | if ($val eq 'none') { |
810aef70 | 662 | $warning_bits = $warnings::NONE; |
08c6f5ec RH |
663 | next(); |
664 | } | |
665 | ||
666 | my @names; | |
667 | if (ref $val) { | |
668 | @names = @$val; | |
669 | } | |
670 | else { | |
671 | @names = split/\s+/, $val; | |
672 | } | |
673 | ||
810aef70 | 674 | $warning_bits = $warnings::NONE if !defined ($warning_bits); |
08c6f5ec RH |
675 | $warning_bits |= warnings::bits(@names); |
676 | } | |
677 | ||
678 | elsif ($name eq 'warning_bits') { | |
679 | $warning_bits = $val; | |
680 | } | |
681 | ||
682 | elsif ($name eq 'hint_bits') { | |
683 | $hint_bits = $val; | |
684 | } | |
685 | ||
686 | else { | |
687 | croak "Unknown pragma type: $name"; | |
688 | } | |
689 | } | |
690 | if (@_) { | |
691 | croak "The ambient_pragmas method expects an even number of args"; | |
692 | } | |
693 | ||
694 | $self->{'ambient_arybase'} = $arybase; | |
695 | $self->{'ambient_warnings'} = $warning_bits; | |
a0405c92 | 696 | $self->{'ambient_hints'} = $hint_bits; |
08c6f5ec RH |
697 | } |
698 | ||
6e90668e SM |
699 | sub deparse { |
700 | my $self = shift; | |
6ec152c3 | 701 | my($op, $cx, $flags) = @_; |
34a48b4b RH |
702 | |
703 | Carp::confess("Null op in deparse") if !defined($op) | |
704 | || class($op) eq "NULL"; | |
3f872cb9 | 705 | my $meth = "pp_" . $op->name; |
ce4e655d RH |
706 | if (is_scope($op)) { |
707 | return $self->$meth($op, $cx, $flags); | |
6ec152c3 | 708 | } |
9d2c6865 | 709 | return $self->$meth($op, $cx); |
a798dbf2 MB |
710 | } |
711 | ||
6e90668e | 712 | sub indent { |
f4a44678 | 713 | my $self = shift; |
6e90668e SM |
714 | my $txt = shift; |
715 | my @lines = split(/\n/, $txt); | |
716 | my $leader = ""; | |
f4a44678 | 717 | my $level = 0; |
6e90668e SM |
718 | my $line; |
719 | for $line (@lines) { | |
f4a44678 SM |
720 | my $cmd = substr($line, 0, 1); |
721 | if ($cmd eq "\t" or $cmd eq "\b") { | |
722 | $level += ($cmd eq "\t" ? 1 : -1) * $self->{'indent_size'}; | |
723 | if ($self->{'use_tabs'}) { | |
724 | $leader = "\t" x ($level / 8) . " " x ($level % 8); | |
725 | } else { | |
726 | $leader = " " x $level; | |
727 | } | |
6e90668e SM |
728 | $line = substr($line, 1); |
729 | } | |
f5aa8f4e SM |
730 | if (substr($line, 0, 1) eq "\f") { |
731 | $line = substr($line, 1); # no indent | |
732 | } else { | |
733 | $line = $leader . $line; | |
734 | } | |
9d2c6865 | 735 | $line =~ s/\cK;?//g; |
6e90668e SM |
736 | } |
737 | return join("\n", @lines); | |
738 | } | |
739 | ||
6e90668e SM |
740 | sub deparse_sub { |
741 | my $self = shift; | |
742 | my $cv = shift; | |
743 | my $proto = ""; | |
ce4e655d | 744 | Carp::confess("NULL in deparse_sub") if !defined($cv) || $cv->isa("B::NULL"); |
34a48b4b RH |
745 | Carp::confess("SPECIAL in deparse_sub") if $cv->isa("B::SPECIAL"); |
746 | local $self->{'curcop'} = $self->{'curcop'}; | |
6e90668e SM |
747 | if ($cv->FLAGS & SVf_POK) { |
748 | $proto = "(". $cv->PV . ") "; | |
749 | } | |
6aaf4108 SC |
750 | if ($cv->CvFLAGS & (CVf_METHOD|CVf_LOCKED|CVf_LVALUE)) { |
751 | $proto .= ": "; | |
752 | $proto .= "lvalue " if $cv->CvFLAGS & CVf_LVALUE; | |
753 | $proto .= "locked " if $cv->CvFLAGS & CVf_LOCKED; | |
754 | $proto .= "method " if $cv->CvFLAGS & CVf_METHOD; | |
755 | } | |
756 | ||
6e90668e | 757 | local($self->{'curcv'}) = $cv; |
8510e997 | 758 | local($self->{'curcvlex'}); |
a0405c92 RH |
759 | local(@$self{qw'curstash warnings hints'}) |
760 | = @$self{qw'curstash warnings hints'}; | |
ce4e655d | 761 | my $body; |
6e90668e | 762 | if (not null $cv->ROOT) { |
ce4e655d RH |
763 | my $lineseq = $cv->ROOT->first; |
764 | if ($lineseq->name eq "lineseq") { | |
765 | my @ops; | |
766 | for(my$o=$lineseq->first; $$o; $o=$o->sibling) { | |
767 | push @ops, $o; | |
768 | } | |
769 | $body = $self->lineseq(undef, @ops).";"; | |
770 | my $scope_en = $self->find_scope_en($lineseq); | |
771 | if (defined $scope_en) { | |
772 | my $subs = join"", $self->seq_subs($scope_en); | |
773 | $body .= ";\n$subs" if length($subs); | |
774 | } | |
775 | } | |
776 | else { | |
777 | $body = $self->deparse($cv->ROOT->first, 0); | |
778 | } | |
de3f1649 | 779 | } |
ce4e655d RH |
780 | else { |
781 | my $sv = $cv->const_sv; | |
782 | if ($$sv) { | |
783 | # uh-oh. inlinable sub... format it differently | |
784 | return $proto . "{ " . const($sv) . " }\n"; | |
785 | } else { # XSUB? (or just a declaration) | |
786 | return "$proto;\n"; | |
787 | } | |
6e90668e | 788 | } |
ce4e655d | 789 | return $proto ."{\n\t$body\n\b}" ."\n"; |
6e90668e SM |
790 | } |
791 | ||
792 | sub deparse_format { | |
793 | my $self = shift; | |
794 | my $form = shift; | |
795 | my @text; | |
796 | local($self->{'curcv'}) = $form; | |
8510e997 | 797 | local($self->{'curcvlex'}); |
67fc2416 | 798 | local($self->{'in_format'}) = 1; |
a0405c92 | 799 | local(@$self{qw'curstash warnings hints'}) |
67fc2416 | 800 | = @$self{qw'curstash warnings hints'}; |
6e90668e SM |
801 | my $op = $form->ROOT; |
802 | my $kid; | |
fb725297 RGS |
803 | return "\f." if $op->first->name eq 'stub' |
804 | || $op->first->name eq 'nextstate'; | |
6e90668e SM |
805 | $op = $op->first->first; # skip leavewrite, lineseq |
806 | while (not null $op) { | |
807 | $op = $op->sibling; # skip nextstate | |
808 | my @exprs; | |
809 | $kid = $op->first->sibling; # skip pushmark | |
a5b0cd91 | 810 | push @text, "\f".$self->const_sv($kid)->PV; |
6e90668e SM |
811 | $kid = $kid->sibling; |
812 | for (; not null $kid; $kid = $kid->sibling) { | |
9d2c6865 | 813 | push @exprs, $self->deparse($kid, 0); |
6e90668e | 814 | } |
a5b0cd91 | 815 | push @text, "\f".join(", ", @exprs)."\n" if @exprs; |
6e90668e SM |
816 | $op = $op->sibling; |
817 | } | |
a5b0cd91 | 818 | return join("", @text) . "\f."; |
6e90668e SM |
819 | } |
820 | ||
6e90668e | 821 | sub is_scope { |
a798dbf2 | 822 | my $op = shift; |
3f872cb9 GS |
823 | return $op->name eq "leave" || $op->name eq "scope" |
824 | || $op->name eq "lineseq" | |
825 | || ($op->name eq "null" && class($op) eq "UNOP" | |
826 | && (is_scope($op->first) || $op->first->name eq "enter")); | |
6e90668e SM |
827 | } |
828 | ||
829 | sub is_state { | |
3f872cb9 GS |
830 | my $name = $_[0]->name; |
831 | return $name eq "nextstate" || $name eq "dbstate" || $name eq "setstate"; | |
6e90668e SM |
832 | } |
833 | ||
834 | sub is_miniwhile { # check for one-line loop (`foo() while $y--') | |
835 | my $op = shift; | |
836 | return (!null($op) and null($op->sibling) | |
3f872cb9 GS |
837 | and $op->name eq "null" and class($op) eq "UNOP" |
838 | and (($op->first->name =~ /^(and|or)$/ | |
839 | and $op->first->first->sibling->name eq "lineseq") | |
840 | or ($op->first->name eq "lineseq" | |
6e90668e | 841 | and not null $op->first->first->sibling |
3f872cb9 | 842 | and $op->first->first->sibling->name eq "unstack") |
6e90668e SM |
843 | )); |
844 | } | |
845 | ||
846 | sub is_scalar { | |
847 | my $op = shift; | |
3f872cb9 GS |
848 | return ($op->name eq "rv2sv" or |
849 | $op->name eq "padsv" or | |
850 | $op->name eq "gv" or # only in array/hash constructs | |
bd0865ec | 851 | $op->flags & OPf_KIDS && !null($op->first) |
3f872cb9 | 852 | && $op->first->name eq "gvsv"); |
6e90668e SM |
853 | } |
854 | ||
9d2c6865 SM |
855 | sub maybe_parens { |
856 | my $self = shift; | |
857 | my($text, $cx, $prec) = @_; | |
858 | if ($prec < $cx # unary ops nest just fine | |
859 | or $prec == $cx and $cx != 4 and $cx != 16 and $cx != 21 | |
860 | or $self->{'parens'}) | |
861 | { | |
862 | $text = "($text)"; | |
863 | # In a unop, let parent reuse our parens; see maybe_parens_unop | |
864 | $text = "\cS" . $text if $cx == 16; | |
865 | return $text; | |
866 | } else { | |
867 | return $text; | |
868 | } | |
869 | } | |
870 | ||
871 | # same as above, but get around the `if it looks like a function' rule | |
872 | sub maybe_parens_unop { | |
873 | my $self = shift; | |
874 | my($name, $kid, $cx) = @_; | |
875 | if ($cx > 16 or $self->{'parens'}) { | |
a0035eb8 RH |
876 | $kid = $self->deparse($kid, 1); |
877 | if ($name eq "umask" && $kid =~ /^\d+$/) { | |
878 | $kid = sprintf("%#o", $kid); | |
879 | } | |
880 | return "$name($kid)"; | |
9d2c6865 SM |
881 | } else { |
882 | $kid = $self->deparse($kid, 16); | |
a0035eb8 RH |
883 | if ($name eq "umask" && $kid =~ /^\d+$/) { |
884 | $kid = sprintf("%#o", $kid); | |
885 | } | |
9d2c6865 SM |
886 | if (substr($kid, 0, 1) eq "\cS") { |
887 | # use kid's parens | |
888 | return $name . substr($kid, 1); | |
889 | } elsif (substr($kid, 0, 1) eq "(") { | |
890 | # avoid looks-like-a-function trap with extra parens | |
891 | # (`+' can lead to ambiguities) | |
892 | return "$name(" . $kid . ")"; | |
893 | } else { | |
894 | return "$name $kid"; | |
895 | } | |
896 | } | |
897 | } | |
898 | ||
899 | sub maybe_parens_func { | |
900 | my $self = shift; | |
901 | my($func, $text, $cx, $prec) = @_; | |
902 | if ($prec <= $cx or substr($text, 0, 1) eq "(" or $self->{'parens'}) { | |
903 | return "$func($text)"; | |
904 | } else { | |
905 | return "$func $text"; | |
906 | } | |
907 | } | |
908 | ||
6e90668e SM |
909 | sub maybe_local { |
910 | my $self = shift; | |
9d2c6865 | 911 | my($op, $cx, $text) = @_; |
ce4e655d RH |
912 | my $our_intro = ($op->name =~ /^(gv|rv2)[ash]v$/) ? OPpOUR_INTRO : 0; |
913 | if ($op->private & (OPpLVAL_INTRO|$our_intro) | |
914 | and not $self->{'avoid_local'}{$$op}) { | |
915 | my $our_local = ($op->private & OPpLVAL_INTRO) ? "local" : "our"; | |
e8d3f51b | 916 | if (want_scalar($op)) { |
ce4e655d | 917 | return "$our_local $text"; |
e8d3f51b | 918 | } else { |
ce4e655d | 919 | return $self->maybe_parens_func("$our_local", $text, $cx, 16); |
e8d3f51b | 920 | } |
6e90668e SM |
921 | } else { |
922 | return $text; | |
a798dbf2 | 923 | } |
a798dbf2 MB |
924 | } |
925 | ||
3ed82cfc GS |
926 | sub maybe_targmy { |
927 | my $self = shift; | |
928 | my($op, $cx, $func, @args) = @_; | |
929 | if ($op->private & OPpTARGET_MY) { | |
930 | my $var = $self->padname($op->targ); | |
931 | my $val = $func->($self, $op, 7, @args); | |
932 | return $self->maybe_parens("$var = $val", $cx, 7); | |
933 | } else { | |
934 | return $func->($self, $op, $cx, @args); | |
935 | } | |
936 | } | |
937 | ||
6e90668e SM |
938 | sub padname_sv { |
939 | my $self = shift; | |
940 | my $targ = shift; | |
941 | return (($self->{'curcv'}->PADLIST->ARRAY)[0]->ARRAY)[$targ]; | |
942 | } | |
943 | ||
944 | sub maybe_my { | |
945 | my $self = shift; | |
9d2c6865 | 946 | my($op, $cx, $text) = @_; |
4c1f658f | 947 | if ($op->private & OPpLVAL_INTRO and not $self->{'avoid_local'}{$$op}) { |
e8d3f51b RH |
948 | if (want_scalar($op)) { |
949 | return "my $text"; | |
950 | } else { | |
951 | return $self->maybe_parens_func("my", $text, $cx, 16); | |
952 | } | |
6e90668e SM |
953 | } else { |
954 | return $text; | |
955 | } | |
956 | } | |
957 | ||
9d2c6865 SM |
958 | # The following OPs don't have functions: |
959 | ||
960 | # pp_padany -- does not exist after parsing | |
9d2c6865 | 961 | |
2ae48fff RGS |
962 | sub AUTOLOAD { |
963 | if ($AUTOLOAD =~ s/^.*::pp_//) { | |
964 | warn "unexpected OP_".uc $AUTOLOAD; | |
965 | return "XXX"; | |
966 | } else { | |
967 | die "Undefined subroutine $AUTOLOAD called"; | |
968 | } | |
9d2c6865 | 969 | } |
6e90668e | 970 | |
611c1e95 IZ |
971 | sub DESTROY {} # Do not AUTOLOAD |
972 | ||
ce4e655d RH |
973 | # $root should be the op which represents the root of whatever |
974 | # we're sequencing here. If it's undefined, then we don't append | |
975 | # any subroutine declarations to the deparsed ops, otherwise we | |
976 | # append appropriate declarations. | |
58cccf98 | 977 | sub lineseq { |
ce4e655d | 978 | my($self, $root, @ops) = @_; |
58cccf98 | 979 | my($expr, @exprs); |
ce4e655d RH |
980 | |
981 | my $out_cop = $self->{'curcop'}; | |
982 | my $out_seq = defined($out_cop) ? $out_cop->cop_seq : undef; | |
983 | my $limit_seq; | |
984 | if (defined $root) { | |
985 | $limit_seq = $out_seq; | |
986 | my $nseq = $self->find_scope_st($root->sibling) if ${$root->sibling}; | |
987 | $limit_seq = $nseq if !defined($limit_seq) | |
988 | or defined($nseq) && $nseq < $limit_seq; | |
989 | } | |
990 | $limit_seq = $self->{'limit_seq'} | |
991 | if defined($self->{'limit_seq'}) | |
992 | && (!defined($limit_seq) || $self->{'limit_seq'} < $limit_seq); | |
993 | local $self->{'limit_seq'} = $limit_seq; | |
58cccf98 | 994 | for (my $i = 0; $i < @ops; $i++) { |
6e90668e | 995 | $expr = ""; |
58cccf98 SM |
996 | if (is_state $ops[$i]) { |
997 | $expr = $self->deparse($ops[$i], 0); | |
998 | $i++; | |
e99ebc55 RH |
999 | if ($i > $#ops) { |
1000 | push @exprs, $expr; | |
1001 | last; | |
1002 | } | |
58cccf98 | 1003 | } |
c73811ab RH |
1004 | if (!is_state $ops[$i] and (my $ls = $ops[$i+1]) and |
1005 | !null($ops[$i+1]) and $ops[$i+1]->name eq "lineseq") | |
58cccf98 | 1006 | { |
c73811ab RH |
1007 | if ($ls->first && !null($ls->first) && is_state($ls->first) |
1008 | && (my $sib = $ls->first->sibling)) { | |
1009 | if (!null($sib) && $sib->name eq "leaveloop") { | |
1010 | push @exprs, $expr . $self->for_loop($ops[$i], 0); | |
1011 | $i++; | |
1012 | next; | |
1013 | } | |
1014 | } | |
6e90668e | 1015 | } |
6ec152c3 | 1016 | $expr .= $self->deparse($ops[$i], 0, (@ops != 1)); |
e99ebc55 | 1017 | $expr =~ s/;\n?\z//; |
f99a63a2 | 1018 | push @exprs, $expr; |
6e90668e | 1019 | } |
ce4e655d RH |
1020 | my $body = join(";\n", grep {length} @exprs); |
1021 | my $subs = ""; | |
67fc2416 | 1022 | if (defined $root && defined $limit_seq && !$self->{'in_format'}) { |
ce4e655d RH |
1023 | $subs = join "\n", $self->seq_subs($limit_seq); |
1024 | } | |
1025 | return join(";\n", grep {length} $body, $subs); | |
6e90668e SM |
1026 | } |
1027 | ||
58cccf98 | 1028 | sub scopeop { |
ce4e655d | 1029 | my($real_block, $self, $op, $cx, $flags) = @_; |
58cccf98 SM |
1030 | my $kid; |
1031 | my @kids; | |
a0405c92 RH |
1032 | |
1033 | local(@$self{qw'curstash warnings hints'}) | |
1034 | = @$self{qw'curstash warnings hints'} if $real_block; | |
58cccf98 SM |
1035 | if ($real_block) { |
1036 | $kid = $op->first->sibling; # skip enter | |
1037 | if (is_miniwhile($kid)) { | |
1038 | my $top = $kid->first; | |
1039 | my $name = $top->name; | |
1040 | if ($name eq "and") { | |
1041 | $name = "while"; | |
1042 | } elsif ($name eq "or") { | |
1043 | $name = "until"; | |
1044 | } else { # no conditional -> while 1 or until 0 | |
1045 | return $self->deparse($top->first, 1) . " while 1"; | |
1046 | } | |
1047 | my $cond = $top->first; | |
1048 | my $body = $cond->sibling->first; # skip lineseq | |
1049 | $cond = $self->deparse($cond, 1); | |
1050 | $body = $self->deparse($body, 1); | |
1051 | return "$body $name $cond"; | |
6e90668e | 1052 | } |
58cccf98 SM |
1053 | } else { |
1054 | $kid = $op->first; | |
1055 | } | |
1056 | for (; !null($kid); $kid = $kid->sibling) { | |
1057 | push @kids, $kid; | |
6e90668e | 1058 | } |
ce4e655d RH |
1059 | if ($flags || $cx > 0) { # inside an expression, (a do {} while for lineseq) |
1060 | return "do {\n\t" . $self->lineseq($op, @kids) . "\n\b}"; | |
9d2c6865 | 1061 | } else { |
ce4e655d | 1062 | my $lineseq = $self->lineseq($op, @kids); |
7a9b44b9 | 1063 | return (length ($lineseq) ? "$lineseq;" : ""); |
6e90668e | 1064 | } |
6e90668e SM |
1065 | } |
1066 | ||
ce4e655d | 1067 | sub pp_scope { scopeop(0, @_); } |
58cccf98 SM |
1068 | sub pp_lineseq { scopeop(0, @_); } |
1069 | sub pp_leave { scopeop(1, @_); } | |
9d2c6865 | 1070 | |
6e90668e SM |
1071 | # The BEGIN {} is used here because otherwise this code isn't executed |
1072 | # when you run B::Deparse on itself. | |
1073 | my %globalnames; | |
1074 | BEGIN { map($globalnames{$_}++, "SIG", "STDIN", "STDOUT", "STDERR", "INC", | |
1075 | "ENV", "ARGV", "ARGVOUT", "_"); } | |
1076 | ||
1077 | sub gv_name { | |
1078 | my $self = shift; | |
1079 | my $gv = shift; | |
34a48b4b | 1080 | Carp::confess() if $gv->isa("B::CV"); |
6e90668e | 1081 | my $stash = $gv->STASH->NAME; |
d9963e60 | 1082 | my $name = $gv->SAFENAME; |
9d2c6865 SM |
1083 | if ($stash eq $self->{'curstash'} or $globalnames{$name} |
1084 | or $name =~ /^[^A-Za-z_]/) | |
1085 | { | |
6e90668e SM |
1086 | $stash = ""; |
1087 | } else { | |
1088 | $stash = $stash . "::"; | |
a798dbf2 | 1089 | } |
083bda02 MS |
1090 | if ($name =~ /^(\^..|{)/) { |
1091 | $name = "{$name}"; # ${^WARNING_BITS}, etc and ${ | |
6e90668e SM |
1092 | } |
1093 | return $stash . $name; | |
a798dbf2 MB |
1094 | } |
1095 | ||
8510e997 RH |
1096 | # Return the name to use for a stash variable. |
1097 | # If a lexical with the same name is in scope, it may need to be | |
1098 | # fully-qualified. | |
1099 | sub stash_variable { | |
1100 | my ($self, $prefix, $name) = @_; | |
1101 | ||
1102 | return "$prefix$name" if $name =~ /::/; | |
1103 | ||
1104 | unless ($prefix eq '$' || $prefix eq '@' || | |
1105 | $prefix eq '%' || $prefix eq '$#') { | |
1106 | return "$prefix$name"; | |
1107 | } | |
1108 | ||
1109 | my $v = ($prefix eq '$#' ? '@' : $prefix) . $name; | |
1110 | return $prefix .$self->{'curstash'}.'::'. $name if $self->lex_in_scope($v); | |
1111 | return "$prefix$name"; | |
1112 | } | |
1113 | ||
1114 | sub lex_in_scope { | |
1115 | my ($self, $name) = @_; | |
1116 | $self->populate_curcvlex() if !defined $self->{'curcvlex'}; | |
1117 | ||
6ec152c3 | 1118 | return 0 if !defined($self->{'curcop'}); |
8510e997 RH |
1119 | my $seq = $self->{'curcop'}->cop_seq; |
1120 | return 0 if !exists $self->{'curcvlex'}{$name}; | |
1121 | for my $a (@{$self->{'curcvlex'}{$name}}) { | |
1122 | my ($st, $en) = @$a; | |
1123 | return 1 if $seq > $st && $seq <= $en; | |
1124 | } | |
1125 | return 0; | |
1126 | } | |
1127 | ||
1128 | sub populate_curcvlex { | |
1129 | my $self = shift; | |
ce4e655d | 1130 | for (my $cv = $self->{'curcv'}; class($cv) eq "CV"; $cv = $cv->OUTSIDE) { |
8510e997 RH |
1131 | my @padlist = $cv->PADLIST->ARRAY; |
1132 | my @ns = $padlist[0]->ARRAY; | |
1133 | ||
1134 | for (my $i=0; $i<@ns; ++$i) { | |
1135 | next if class($ns[$i]) eq "SPECIAL"; | |
ce4e655d | 1136 | next if $ns[$i]->FLAGS & SVpad_OUR; # Skip "our" vars |
0f2fe21d RH |
1137 | if (class($ns[$i]) eq "PV") { |
1138 | # Probably that pesky lexical @_ | |
1139 | next; | |
1140 | } | |
8510e997 RH |
1141 | my $name = $ns[$i]->PVX; |
1142 | my $seq_st = $ns[$i]->NVX; | |
1143 | my $seq_en = int($ns[$i]->IVX); | |
1144 | ||
1145 | push @{$self->{'curcvlex'}{$name}}, [$seq_st, $seq_en]; | |
1146 | } | |
1147 | } | |
1148 | } | |
1149 | ||
ce4e655d RH |
1150 | sub find_scope_st { ((find_scope(@_))[0]); } |
1151 | sub find_scope_en { ((find_scope(@_))[1]); } | |
1152 | ||
1153 | # Recurses down the tree, looking for pad variable introductions and COPs | |
1154 | sub find_scope { | |
1155 | my ($self, $op, $scope_st, $scope_en) = @_; | |
ff97752d | 1156 | carp("Undefined op in find_scope") if !defined $op; |
ce4e655d RH |
1157 | return ($scope_st, $scope_en) unless $op->flags & OPf_KIDS; |
1158 | ||
1159 | for (my $o=$op->first; $$o; $o=$o->sibling) { | |
1160 | if ($o->name =~ /^pad.v$/ && $o->private & OPpLVAL_INTRO) { | |
1161 | my $s = int($self->padname_sv($o->targ)->NVX); | |
1162 | my $e = $self->padname_sv($o->targ)->IVX; | |
1163 | $scope_st = $s if !defined($scope_st) || $s < $scope_st; | |
1164 | $scope_en = $e if !defined($scope_en) || $e > $scope_en; | |
1165 | } | |
1166 | elsif (is_state($o)) { | |
1167 | my $c = $o->cop_seq; | |
1168 | $scope_st = $c if !defined($scope_st) || $c < $scope_st; | |
1169 | $scope_en = $c if !defined($scope_en) || $c > $scope_en; | |
1170 | } | |
1171 | elsif ($o->flags & OPf_KIDS) { | |
1172 | ($scope_st, $scope_en) = | |
1173 | $self->find_scope($o, $scope_st, $scope_en) | |
34a48b4b RH |
1174 | } |
1175 | } | |
ce4e655d RH |
1176 | |
1177 | return ($scope_st, $scope_en); | |
34a48b4b RH |
1178 | } |
1179 | ||
1180 | # Returns a list of subs which should be inserted before the COP | |
1181 | sub cop_subs { | |
1182 | my ($self, $op, $out_seq) = @_; | |
1183 | my $seq = $op->cop_seq; | |
1184 | # If we have nephews, then our sequence number indicates | |
1185 | # the cop_seq of the end of some sort of scope. | |
1186 | if (class($op->sibling) ne "NULL" && $op->sibling->flags & OPf_KIDS | |
ce4e655d RH |
1187 | and my $nseq = $self->find_scope_st($op->sibling) ) { |
1188 | $seq = $nseq; | |
34a48b4b RH |
1189 | } |
1190 | $seq = $out_seq if defined($out_seq) && $out_seq < $seq; | |
1191 | return $self->seq_subs($seq); | |
1192 | } | |
1193 | ||
1194 | sub seq_subs { | |
1195 | my ($self, $seq) = @_; | |
1196 | my @text; | |
1197 | #push @text, "# ($seq)\n"; | |
1198 | ||
ce4e655d | 1199 | return "" if !defined $seq; |
34a48b4b RH |
1200 | while (scalar(@{$self->{'subs_todo'}}) |
1201 | and $seq > $self->{'subs_todo'}[0][0]) { | |
1202 | push @text, $self->next_todo; | |
1203 | } | |
1204 | return @text; | |
1205 | } | |
1206 | ||
08c6f5ec | 1207 | # Notice how subs and formats are inserted between statements here; |
a0405c92 | 1208 | # also $[ assignments and pragmas. |
6e90668e SM |
1209 | sub pp_nextstate { |
1210 | my $self = shift; | |
9d2c6865 | 1211 | my($op, $cx) = @_; |
34a48b4b | 1212 | $self->{'curcop'} = $op; |
6e90668e | 1213 | my @text; |
34a48b4b | 1214 | push @text, $self->cop_subs($op); |
e99ebc55 | 1215 | push @text, $op->label . ": " if $op->label; |
11faa288 | 1216 | my $stash = $op->stashpv; |
6e90668e SM |
1217 | if ($stash ne $self->{'curstash'}) { |
1218 | push @text, "package $stash;\n"; | |
1219 | $self->{'curstash'} = $stash; | |
1220 | } | |
f5aa8f4e SM |
1221 | if ($self->{'linenums'}) { |
1222 | push @text, "\f#line " . $op->line . | |
57843af0 | 1223 | ' "' . $op->file, qq'"\n'; |
f5aa8f4e | 1224 | } |
08c6f5ec | 1225 | |
7a9b44b9 RH |
1226 | if ($self->{'arybase'} != $op->arybase) { |
1227 | push @text, '$[ = '. $op->arybase .";\n"; | |
1228 | $self->{'arybase'} = $op->arybase; | |
1229 | } | |
1230 | ||
1231 | my $warnings = $op->warnings; | |
1232 | my $warning_bits; | |
1233 | if ($warnings->isa("B::SPECIAL") && $$warnings == 4) { | |
810aef70 | 1234 | $warning_bits = $warnings::Bits{"all"} & WARN_MASK; |
7a9b44b9 | 1235 | } |
e31885a0 | 1236 | elsif ($warnings->isa("B::SPECIAL") && $$warnings == 5) { |
810aef70 | 1237 | $warning_bits = $warnings::NONE; |
7a9b44b9 | 1238 | } |
e31885a0 RH |
1239 | elsif ($warnings->isa("B::SPECIAL")) { |
1240 | $warning_bits = undef; | |
1241 | } | |
7a9b44b9 | 1242 | else { |
34a48b4b | 1243 | $warning_bits = $warnings->PV & WARN_MASK; |
7a9b44b9 RH |
1244 | } |
1245 | ||
e31885a0 RH |
1246 | if (defined ($warning_bits) and |
1247 | !defined($self->{warnings}) || $self->{'warnings'} ne $warning_bits) { | |
08c6f5ec | 1248 | push @text, declare_warnings($self->{'warnings'}, $warning_bits); |
7a9b44b9 RH |
1249 | $self->{'warnings'} = $warning_bits; |
1250 | } | |
1251 | ||
a0405c92 RH |
1252 | if ($self->{'hints'} != $op->private) { |
1253 | push @text, declare_hints($self->{'hints'}, $op->private); | |
1254 | $self->{'hints'} = $op->private; | |
1255 | } | |
1256 | ||
6e90668e SM |
1257 | return join("", @text); |
1258 | } | |
1259 | ||
08c6f5ec RH |
1260 | sub declare_warnings { |
1261 | my ($from, $to) = @_; | |
6ec152c3 | 1262 | if (($to & WARN_MASK) eq warnings::bits("all")) { |
a0405c92 RH |
1263 | return "use warnings;\n"; |
1264 | } | |
6ec152c3 | 1265 | elsif (($to & WARN_MASK) eq "\0"x length($to)) { |
a0405c92 RH |
1266 | return "no warnings;\n"; |
1267 | } | |
51a5edaf | 1268 | return "BEGIN {\${^WARNING_BITS} = ".perlstring($to)."}\n"; |
a0405c92 RH |
1269 | } |
1270 | ||
1271 | sub declare_hints { | |
1272 | my ($from, $to) = @_; | |
a0035eb8 RH |
1273 | my $use = $to & ~$from; |
1274 | my $no = $from & ~$to; | |
1275 | my $decls = ""; | |
1276 | for my $pragma (hint_pragmas($use)) { | |
1277 | $decls .= "use $pragma;\n"; | |
1278 | } | |
1279 | for my $pragma (hint_pragmas($no)) { | |
1280 | $decls .= "no $pragma;\n"; | |
1281 | } | |
1282 | return $decls; | |
1283 | } | |
1284 | ||
1285 | sub hint_pragmas { | |
1286 | my ($bits) = @_; | |
1287 | my @pragmas; | |
1288 | push @pragmas, "integer" if $bits & 0x1; | |
1289 | push @pragmas, "strict 'refs'" if $bits & 0x2; | |
1290 | push @pragmas, "bytes" if $bits & 0x8; | |
1291 | return @pragmas; | |
08c6f5ec RH |
1292 | } |
1293 | ||
6e90668e | 1294 | sub pp_dbstate { pp_nextstate(@_) } |
3f872cb9 | 1295 | sub pp_setstate { pp_nextstate(@_) } |
6e90668e SM |
1296 | |
1297 | sub pp_unstack { return "" } # see also leaveloop | |
1298 | ||
1299 | sub baseop { | |
1300 | my $self = shift; | |
9d2c6865 | 1301 | my($op, $cx, $name) = @_; |
6e90668e SM |
1302 | return $name; |
1303 | } | |
1304 | ||
e99ebc55 RH |
1305 | sub pp_stub { |
1306 | my $self = shift; | |
1307 | my($op, $cx, $name) = @_; | |
1308 | if ($cx) { | |
1309 | return "()"; | |
1310 | } | |
1311 | else { | |
1312 | return "();"; | |
1313 | } | |
1314 | } | |
6e90668e SM |
1315 | sub pp_wantarray { baseop(@_, "wantarray") } |
1316 | sub pp_fork { baseop(@_, "fork") } | |
3ed82cfc GS |
1317 | sub pp_wait { maybe_targmy(@_, \&baseop, "wait") } |
1318 | sub pp_getppid { maybe_targmy(@_, \&baseop, "getppid") } | |
1319 | sub pp_time { maybe_targmy(@_, \&baseop, "time") } | |
6e90668e SM |
1320 | sub pp_tms { baseop(@_, "times") } |
1321 | sub pp_ghostent { baseop(@_, "gethostent") } | |
1322 | sub pp_gnetent { baseop(@_, "getnetent") } | |
1323 | sub pp_gprotoent { baseop(@_, "getprotoent") } | |
1324 | sub pp_gservent { baseop(@_, "getservent") } | |
1325 | sub pp_ehostent { baseop(@_, "endhostent") } | |
1326 | sub pp_enetent { baseop(@_, "endnetent") } | |
1327 | sub pp_eprotoent { baseop(@_, "endprotoent") } | |
1328 | sub pp_eservent { baseop(@_, "endservent") } | |
1329 | sub pp_gpwent { baseop(@_, "getpwent") } | |
1330 | sub pp_spwent { baseop(@_, "setpwent") } | |
1331 | sub pp_epwent { baseop(@_, "endpwent") } | |
1332 | sub pp_ggrent { baseop(@_, "getgrent") } | |
1333 | sub pp_sgrent { baseop(@_, "setgrent") } | |
1334 | sub pp_egrent { baseop(@_, "endgrent") } | |
1335 | sub pp_getlogin { baseop(@_, "getlogin") } | |
1336 | ||
1337 | sub POSTFIX () { 1 } | |
1338 | ||
9d2c6865 SM |
1339 | # I couldn't think of a good short name, but this is the category of |
1340 | # symbolic unary operators with interesting precedence | |
1341 | ||
1342 | sub pfixop { | |
1343 | my $self = shift; | |
1344 | my($op, $cx, $name, $prec, $flags) = (@_, 0); | |
1345 | my $kid = $op->first; | |
1346 | $kid = $self->deparse($kid, $prec); | |
1347 | return $self->maybe_parens(($flags & POSTFIX) ? "$kid$name" : "$name$kid", | |
1348 | $cx, $prec); | |
1349 | } | |
1350 | ||
1351 | sub pp_preinc { pfixop(@_, "++", 23) } | |
1352 | sub pp_predec { pfixop(@_, "--", 23) } | |
3ed82cfc GS |
1353 | sub pp_postinc { maybe_targmy(@_, \&pfixop, "++", 23, POSTFIX) } |
1354 | sub pp_postdec { maybe_targmy(@_, \&pfixop, "--", 23, POSTFIX) } | |
9d2c6865 SM |
1355 | sub pp_i_preinc { pfixop(@_, "++", 23) } |
1356 | sub pp_i_predec { pfixop(@_, "--", 23) } | |
3ed82cfc GS |
1357 | sub pp_i_postinc { maybe_targmy(@_, \&pfixop, "++", 23, POSTFIX) } |
1358 | sub pp_i_postdec { maybe_targmy(@_, \&pfixop, "--", 23, POSTFIX) } | |
68cc8748 | 1359 | sub pp_complement { maybe_targmy(@_, \&pfixop, "~", 21) } |
9d2c6865 | 1360 | |
3ed82cfc GS |
1361 | sub pp_negate { maybe_targmy(@_, \&real_negate) } |
1362 | sub real_negate { | |
9d2c6865 SM |
1363 | my $self = shift; |
1364 | my($op, $cx) = @_; | |
3f872cb9 | 1365 | if ($op->first->name =~ /^(i_)?negate$/) { |
9d2c6865 SM |
1366 | # avoid --$x |
1367 | $self->pfixop($op, $cx, "-", 21.5); | |
1368 | } else { | |
1369 | $self->pfixop($op, $cx, "-", 21); | |
1370 | } | |
1371 | } | |
1372 | sub pp_i_negate { pp_negate(@_) } | |
1373 | ||
1374 | sub pp_not { | |
1375 | my $self = shift; | |
1376 | my($op, $cx) = @_; | |
1377 | if ($cx <= 4) { | |
1378 | $self->pfixop($op, $cx, "not ", 4); | |
1379 | } else { | |
1380 | $self->pfixop($op, $cx, "!", 21); | |
1381 | } | |
1382 | } | |
1383 | ||
6e90668e SM |
1384 | sub unop { |
1385 | my $self = shift; | |
f4a44678 | 1386 | my($op, $cx, $name) = @_; |
6e90668e | 1387 | my $kid; |
9d2c6865 | 1388 | if ($op->flags & OPf_KIDS) { |
6e90668e | 1389 | $kid = $op->first; |
e31885a0 RH |
1390 | if (defined prototype("CORE::$name") |
1391 | && prototype("CORE::$name") =~ /^;?\*/ | |
1392 | && $kid->name eq "rv2gv") { | |
1393 | $kid = $kid->first; | |
1394 | } | |
1395 | ||
9d2c6865 | 1396 | return $self->maybe_parens_unop($name, $kid, $cx); |
6e90668e | 1397 | } else { |
9d2c6865 | 1398 | return $name . ($op->flags & OPf_SPECIAL ? "()" : ""); |
6e90668e | 1399 | } |
6e90668e SM |
1400 | } |
1401 | ||
3ed82cfc GS |
1402 | sub pp_chop { maybe_targmy(@_, \&unop, "chop") } |
1403 | sub pp_chomp { maybe_targmy(@_, \&unop, "chomp") } | |
1404 | sub pp_schop { maybe_targmy(@_, \&unop, "chop") } | |
1405 | sub pp_schomp { maybe_targmy(@_, \&unop, "chomp") } | |
6e90668e SM |
1406 | sub pp_defined { unop(@_, "defined") } |
1407 | sub pp_undef { unop(@_, "undef") } | |
1408 | sub pp_study { unop(@_, "study") } | |
6e90668e SM |
1409 | sub pp_ref { unop(@_, "ref") } |
1410 | sub pp_pos { maybe_local(@_, unop(@_, "pos")) } | |
1411 | ||
3ed82cfc GS |
1412 | sub pp_sin { maybe_targmy(@_, \&unop, "sin") } |
1413 | sub pp_cos { maybe_targmy(@_, \&unop, "cos") } | |
1414 | sub pp_rand { maybe_targmy(@_, \&unop, "rand") } | |
6e90668e | 1415 | sub pp_srand { unop(@_, "srand") } |
3ed82cfc GS |
1416 | sub pp_exp { maybe_targmy(@_, \&unop, "exp") } |
1417 | sub pp_log { maybe_targmy(@_, \&unop, "log") } | |
1418 | sub pp_sqrt { maybe_targmy(@_, \&unop, "sqrt") } | |
1419 | sub pp_int { maybe_targmy(@_, \&unop, "int") } | |
1420 | sub pp_hex { maybe_targmy(@_, \&unop, "hex") } | |
1421 | sub pp_oct { maybe_targmy(@_, \&unop, "oct") } | |
1422 | sub pp_abs { maybe_targmy(@_, \&unop, "abs") } | |
1423 | ||
1424 | sub pp_length { maybe_targmy(@_, \&unop, "length") } | |
1425 | sub pp_ord { maybe_targmy(@_, \&unop, "ord") } | |
1426 | sub pp_chr { maybe_targmy(@_, \&unop, "chr") } | |
6e90668e SM |
1427 | |
1428 | sub pp_each { unop(@_, "each") } | |
1429 | sub pp_values { unop(@_, "values") } | |
1430 | sub pp_keys { unop(@_, "keys") } | |
1431 | sub pp_pop { unop(@_, "pop") } | |
1432 | sub pp_shift { unop(@_, "shift") } | |
1433 | ||
1434 | sub pp_caller { unop(@_, "caller") } | |
1435 | sub pp_reset { unop(@_, "reset") } | |
1436 | sub pp_exit { unop(@_, "exit") } | |
1437 | sub pp_prototype { unop(@_, "prototype") } | |
1438 | ||
1439 | sub pp_close { unop(@_, "close") } | |
1440 | sub pp_fileno { unop(@_, "fileno") } | |
1441 | sub pp_umask { unop(@_, "umask") } | |
6e90668e SM |
1442 | sub pp_untie { unop(@_, "untie") } |
1443 | sub pp_tied { unop(@_, "tied") } | |
1444 | sub pp_dbmclose { unop(@_, "dbmclose") } | |
1445 | sub pp_getc { unop(@_, "getc") } | |
1446 | sub pp_eof { unop(@_, "eof") } | |
1447 | sub pp_tell { unop(@_, "tell") } | |
1448 | sub pp_getsockname { unop(@_, "getsockname") } | |
1449 | sub pp_getpeername { unop(@_, "getpeername") } | |
1450 | ||
3ed82cfc GS |
1451 | sub pp_chdir { maybe_targmy(@_, \&unop, "chdir") } |
1452 | sub pp_chroot { maybe_targmy(@_, \&unop, "chroot") } | |
6e90668e | 1453 | sub pp_readlink { unop(@_, "readlink") } |
3ed82cfc | 1454 | sub pp_rmdir { maybe_targmy(@_, \&unop, "rmdir") } |
6e90668e SM |
1455 | sub pp_readdir { unop(@_, "readdir") } |
1456 | sub pp_telldir { unop(@_, "telldir") } | |
1457 | sub pp_rewinddir { unop(@_, "rewinddir") } | |
1458 | sub pp_closedir { unop(@_, "closedir") } | |
3ed82cfc | 1459 | sub pp_getpgrp { maybe_targmy(@_, \&unop, "getpgrp") } |
6e90668e SM |
1460 | sub pp_localtime { unop(@_, "localtime") } |
1461 | sub pp_gmtime { unop(@_, "gmtime") } | |
1462 | sub pp_alarm { unop(@_, "alarm") } | |
3ed82cfc | 1463 | sub pp_sleep { maybe_targmy(@_, \&unop, "sleep") } |
6e90668e SM |
1464 | |
1465 | sub pp_dofile { unop(@_, "do") } | |
1466 | sub pp_entereval { unop(@_, "eval") } | |
1467 | ||
1468 | sub pp_ghbyname { unop(@_, "gethostbyname") } | |
1469 | sub pp_gnbyname { unop(@_, "getnetbyname") } | |
1470 | sub pp_gpbyname { unop(@_, "getprotobyname") } | |
1471 | sub pp_shostent { unop(@_, "sethostent") } | |
1472 | sub pp_snetent { unop(@_, "setnetent") } | |
1473 | sub pp_sprotoent { unop(@_, "setprotoent") } | |
1474 | sub pp_sservent { unop(@_, "setservent") } | |
1475 | sub pp_gpwnam { unop(@_, "getpwnam") } | |
1476 | sub pp_gpwuid { unop(@_, "getpwuid") } | |
1477 | sub pp_ggrnam { unop(@_, "getgrnam") } | |
1478 | sub pp_ggrgid { unop(@_, "getgrgid") } | |
1479 | ||
1480 | sub pp_lock { unop(@_, "lock") } | |
1481 | ||
1482 | sub pp_exists { | |
1483 | my $self = shift; | |
9d2c6865 | 1484 | my($op, $cx) = @_; |
34a48b4b RH |
1485 | my $arg; |
1486 | if ($op->private & OPpEXISTS_SUB) { | |
1487 | # Checking for the existence of a subroutine | |
1488 | return $self->maybe_parens_func("exists", | |
1489 | $self->pp_rv2cv($op->first, 16), $cx, 16); | |
1490 | } | |
1491 | if ($op->flags & OPf_SPECIAL) { | |
1492 | # Array element, not hash element | |
1493 | return $self->maybe_parens_func("exists", | |
1494 | $self->pp_aelem($op->first, 16), $cx, 16); | |
1495 | } | |
9d2c6865 SM |
1496 | return $self->maybe_parens_func("exists", $self->pp_helem($op->first, 16), |
1497 | $cx, 16); | |
6e90668e SM |
1498 | } |
1499 | ||
6e90668e SM |
1500 | sub pp_delete { |
1501 | my $self = shift; | |
9d2c6865 | 1502 | my($op, $cx) = @_; |
6e90668e SM |
1503 | my $arg; |
1504 | if ($op->private & OPpSLICE) { | |
34a48b4b RH |
1505 | if ($op->flags & OPf_SPECIAL) { |
1506 | # Deleting from an array, not a hash | |
1507 | return $self->maybe_parens_func("delete", | |
1508 | $self->pp_aslice($op->first, 16), | |
1509 | $cx, 16); | |
1510 | } | |
9d2c6865 SM |
1511 | return $self->maybe_parens_func("delete", |
1512 | $self->pp_hslice($op->first, 16), | |
1513 | $cx, 16); | |
6e90668e | 1514 | } else { |
34a48b4b RH |
1515 | if ($op->flags & OPf_SPECIAL) { |
1516 | # Deleting from an array, not a hash | |
1517 | return $self->maybe_parens_func("delete", | |
1518 | $self->pp_aelem($op->first, 16), | |
1519 | $cx, 16); | |
1520 | } | |
9d2c6865 SM |
1521 | return $self->maybe_parens_func("delete", |
1522 | $self->pp_helem($op->first, 16), | |
1523 | $cx, 16); | |
6e90668e | 1524 | } |
6e90668e SM |
1525 | } |
1526 | ||
6e90668e SM |
1527 | sub pp_require { |
1528 | my $self = shift; | |
9d2c6865 | 1529 | my($op, $cx) = @_; |
3f872cb9 | 1530 | if (class($op) eq "UNOP" and $op->first->name eq "const" |
4c1f658f | 1531 | and $op->first->private & OPpCONST_BARE) |
6e90668e | 1532 | { |
18228111 | 1533 | my $name = $self->const_sv($op->first)->PV; |
6e90668e SM |
1534 | $name =~ s[/][::]g; |
1535 | $name =~ s/\.pm//g; | |
34a48b4b | 1536 | return "require $name"; |
6e90668e | 1537 | } else { |
9d2c6865 | 1538 | $self->unop($op, $cx, "require"); |
6e90668e SM |
1539 | } |
1540 | } | |
1541 | ||
9d2c6865 SM |
1542 | sub pp_scalar { |
1543 | my $self = shift; | |
1544 | my($op, $cv) = @_; | |
1545 | my $kid = $op->first; | |
1546 | if (not null $kid->sibling) { | |
1547 | # XXX Was a here-doc | |
1548 | return $self->dquote($op); | |
1549 | } | |
1550 | $self->unop(@_, "scalar"); | |
1551 | } | |
1552 | ||
1553 | ||
6e90668e SM |
1554 | sub padval { |
1555 | my $self = shift; | |
1556 | my $targ = shift; | |
1557 | return (($self->{'curcv'}->PADLIST->ARRAY)[1]->ARRAY)[$targ]; | |
1558 | } | |
1559 | ||
1560 | sub pp_refgen { | |
1561 | my $self = shift; | |
9d2c6865 | 1562 | my($op, $cx) = @_; |
6e90668e | 1563 | my $kid = $op->first; |
3f872cb9 | 1564 | if ($kid->name eq "null") { |
6e90668e | 1565 | $kid = $kid->first; |
3f872cb9 GS |
1566 | if ($kid->name eq "anonlist" || $kid->name eq "anonhash") { |
1567 | my($pre, $post) = @{{"anonlist" => ["[","]"], | |
1568 | "anonhash" => ["{","}"]}->{$kid->name}}; | |
6e90668e SM |
1569 | my($expr, @exprs); |
1570 | $kid = $kid->first->sibling; # skip pushmark | |
1571 | for (; !null($kid); $kid = $kid->sibling) { | |
9d2c6865 | 1572 | $expr = $self->deparse($kid, 6); |
6e90668e SM |
1573 | push @exprs, $expr; |
1574 | } | |
1575 | return $pre . join(", ", @exprs) . $post; | |
1576 | } elsif (!null($kid->sibling) and | |
3f872cb9 | 1577 | $kid->sibling->name eq "anoncode") { |
6e90668e SM |
1578 | return "sub " . |
1579 | $self->deparse_sub($self->padval($kid->sibling->targ)); | |
3f872cb9 GS |
1580 | } elsif ($kid->name eq "pushmark") { |
1581 | my $sib_name = $kid->sibling->name; | |
1582 | if ($sib_name =~ /^(pad|rv2)[ah]v$/ | |
c8c62db7 AD |
1583 | and not $kid->sibling->flags & OPf_REF) |
1584 | { | |
1585 | # The @a in \(@a) isn't in ref context, but only when the | |
1586 | # parens are there. | |
1587 | return "\\(" . $self->deparse($kid->sibling, 1) . ")"; | |
3f872cb9 | 1588 | } elsif ($sib_name eq 'entersub') { |
c8c62db7 AD |
1589 | my $text = $self->deparse($kid->sibling, 1); |
1590 | # Always show parens for \(&func()), but only with -p otherwise | |
1591 | $text = "($text)" if $self->{'parens'} | |
1592 | or $kid->sibling->private & OPpENTERSUB_AMPER; | |
1593 | return "\\$text"; | |
1594 | } | |
1595 | } | |
6e90668e | 1596 | } |
9d2c6865 | 1597 | $self->pfixop($op, $cx, "\\", 20); |
6e90668e SM |
1598 | } |
1599 | ||
1600 | sub pp_srefgen { pp_refgen(@_) } | |
1601 | ||
1602 | sub pp_readline { | |
1603 | my $self = shift; | |
9d2c6865 | 1604 | my($op, $cx) = @_; |
6e90668e | 1605 | my $kid = $op->first; |
3f872cb9 | 1606 | $kid = $kid->first if $kid->name eq "rv2gv"; # <$fh> |
e31885a0 RH |
1607 | return "<" . $self->deparse($kid, 1) . ">" if is_scalar($kid); |
1608 | return $self->unop($op, $cx, "readline"); | |
6e90668e SM |
1609 | } |
1610 | ||
ad8caead RGS |
1611 | sub pp_rcatline { |
1612 | my $self = shift; | |
1613 | my($op) = @_; | |
1614 | return "<" . $self->gv_name($op->gv) . ">"; | |
1615 | } | |
1616 | ||
bd0865ec GS |
1617 | # Unary operators that can occur as pseudo-listops inside double quotes |
1618 | sub dq_unop { | |
1619 | my $self = shift; | |
1620 | my($op, $cx, $name, $prec, $flags) = (@_, 0, 0); | |
1621 | my $kid; | |
1622 | if ($op->flags & OPf_KIDS) { | |
1623 | $kid = $op->first; | |
1624 | # If there's more than one kid, the first is an ex-pushmark. | |
1625 | $kid = $kid->sibling if not null $kid->sibling; | |
1626 | return $self->maybe_parens_unop($name, $kid, $cx); | |
1627 | } else { | |
1628 | return $name . ($op->flags & OPf_SPECIAL ? "()" : ""); | |
1629 | } | |
1630 | } | |
1631 | ||
1632 | sub pp_ucfirst { dq_unop(@_, "ucfirst") } | |
1633 | sub pp_lcfirst { dq_unop(@_, "lcfirst") } | |
1634 | sub pp_uc { dq_unop(@_, "uc") } | |
1635 | sub pp_lc { dq_unop(@_, "lc") } | |
3ed82cfc | 1636 | sub pp_quotemeta { maybe_targmy(@_, \&dq_unop, "quotemeta") } |
bd0865ec | 1637 | |
6e90668e SM |
1638 | sub loopex { |
1639 | my $self = shift; | |
9d2c6865 | 1640 | my ($op, $cx, $name) = @_; |
6e90668e | 1641 | if (class($op) eq "PVOP") { |
9d2c6865 SM |
1642 | return "$name " . $op->pv; |
1643 | } elsif (class($op) eq "OP") { | |
1644 | return $name; | |
6e90668e | 1645 | } elsif (class($op) eq "UNOP") { |
9d2c6865 SM |
1646 | # Note -- loop exits are actually exempt from the |
1647 | # looks-like-a-func rule, but a few extra parens won't hurt | |
1648 | return $self->maybe_parens_unop($name, $op->first, $cx); | |
6e90668e | 1649 | } |
6e90668e SM |
1650 | } |
1651 | ||
1652 | sub pp_last { loopex(@_, "last") } | |
1653 | sub pp_next { loopex(@_, "next") } | |
1654 | sub pp_redo { loopex(@_, "redo") } | |
1655 | sub pp_goto { loopex(@_, "goto") } | |
1656 | sub pp_dump { loopex(@_, "dump") } | |
1657 | ||
1658 | sub ftst { | |
1659 | my $self = shift; | |
9d2c6865 | 1660 | my($op, $cx, $name) = @_; |
6e90668e | 1661 | if (class($op) eq "UNOP") { |
9d2c6865 SM |
1662 | # Genuine `-X' filetests are exempt from the LLAFR, but not |
1663 | # l?stat(); for the sake of clarity, give'em all parens | |
1664 | return $self->maybe_parens_unop($name, $op->first, $cx); | |
7934575e | 1665 | } elsif (class($op) eq "SVOP") { |
9d2c6865 | 1666 | return $self->maybe_parens_func($name, $self->pp_gv($op, 1), $cx, 16); |
6e90668e | 1667 | } else { # I don't think baseop filetests ever survive ck_ftst, but... |
9d2c6865 | 1668 | return $name; |
6e90668e | 1669 | } |
6e90668e SM |
1670 | } |
1671 | ||
1672 | sub pp_lstat { ftst(@_, "lstat") } | |
1673 | sub pp_stat { ftst(@_, "stat") } | |
1674 | sub pp_ftrread { ftst(@_, "-R") } | |
1675 | sub pp_ftrwrite { ftst(@_, "-W") } | |
1676 | sub pp_ftrexec { ftst(@_, "-X") } | |
1677 | sub pp_fteread { ftst(@_, "-r") } | |
e31885a0 RH |
1678 | sub pp_ftewrite { ftst(@_, "-w") } |
1679 | sub pp_fteexec { ftst(@_, "-x") } | |
6e90668e SM |
1680 | sub pp_ftis { ftst(@_, "-e") } |
1681 | sub pp_fteowned { ftst(@_, "-O") } | |
1682 | sub pp_ftrowned { ftst(@_, "-o") } | |
1683 | sub pp_ftzero { ftst(@_, "-z") } | |
1684 | sub pp_ftsize { ftst(@_, "-s") } | |
1685 | sub pp_ftmtime { ftst(@_, "-M") } | |
1686 | sub pp_ftatime { ftst(@_, "-A") } | |
1687 | sub pp_ftctime { ftst(@_, "-C") } | |
1688 | sub pp_ftsock { ftst(@_, "-S") } | |
1689 | sub pp_ftchr { ftst(@_, "-c") } | |
1690 | sub pp_ftblk { ftst(@_, "-b") } | |
1691 | sub pp_ftfile { ftst(@_, "-f") } | |
1692 | sub pp_ftdir { ftst(@_, "-d") } | |
1693 | sub pp_ftpipe { ftst(@_, "-p") } | |
1694 | sub pp_ftlink { ftst(@_, "-l") } | |
1695 | sub pp_ftsuid { ftst(@_, "-u") } | |
1696 | sub pp_ftsgid { ftst(@_, "-g") } | |
1697 | sub pp_ftsvtx { ftst(@_, "-k") } | |
1698 | sub pp_fttty { ftst(@_, "-t") } | |
1699 | sub pp_fttext { ftst(@_, "-T") } | |
1700 | sub pp_ftbinary { ftst(@_, "-B") } | |
1701 | ||
a798dbf2 | 1702 | sub SWAP_CHILDREN () { 1 } |
6e90668e | 1703 | sub ASSIGN () { 2 } # has OP= variant |
7013e6ae | 1704 | sub LIST_CONTEXT () { 4 } # Assignment is in list context |
6e90668e | 1705 | |
9d2c6865 SM |
1706 | my(%left, %right); |
1707 | ||
1708 | sub assoc_class { | |
1709 | my $op = shift; | |
3f872cb9 GS |
1710 | my $name = $op->name; |
1711 | if ($name eq "concat" and $op->first->name eq "concat") { | |
9d2c6865 | 1712 | # avoid spurious `=' -- see comment in pp_concat |
3f872cb9 | 1713 | return "concat"; |
9d2c6865 | 1714 | } |
3f872cb9 GS |
1715 | if ($name eq "null" and class($op) eq "UNOP" |
1716 | and $op->first->name =~ /^(and|x?or)$/ | |
9d2c6865 SM |
1717 | and null $op->first->sibling) |
1718 | { | |
1719 | # Like all conditional constructs, OP_ANDs and OP_ORs are topped | |
1720 | # with a null that's used as the common end point of the two | |
1721 | # flows of control. For precedence purposes, ignore it. | |
1722 | # (COND_EXPRs have these too, but we don't bother with | |
1723 | # their associativity). | |
1724 | return assoc_class($op->first); | |
1725 | } | |
1726 | return $name . ($op->flags & OPf_STACKED ? "=" : ""); | |
1727 | } | |
1728 | ||
1729 | # Left associative operators, like `+', for which | |
1730 | # $a + $b + $c is equivalent to ($a + $b) + $c | |
1731 | ||
1732 | BEGIN { | |
3f872cb9 GS |
1733 | %left = ('multiply' => 19, 'i_multiply' => 19, |
1734 | 'divide' => 19, 'i_divide' => 19, | |
1735 | 'modulo' => 19, 'i_modulo' => 19, | |
1736 | 'repeat' => 19, | |
1737 | 'add' => 18, 'i_add' => 18, | |
1738 | 'subtract' => 18, 'i_subtract' => 18, | |
1739 | 'concat' => 18, | |
1740 | 'left_shift' => 17, 'right_shift' => 17, | |
1741 | 'bit_and' => 13, | |
1742 | 'bit_or' => 12, 'bit_xor' => 12, | |
1743 | 'and' => 3, | |
1744 | 'or' => 2, 'xor' => 2, | |
9d2c6865 SM |
1745 | ); |
1746 | } | |
1747 | ||
1748 | sub deparse_binop_left { | |
1749 | my $self = shift; | |
1750 | my($op, $left, $prec) = @_; | |
58231d39 | 1751 | if ($left{assoc_class($op)} && $left{assoc_class($left)} |
9d2c6865 SM |
1752 | and $left{assoc_class($op)} == $left{assoc_class($left)}) |
1753 | { | |
1754 | return $self->deparse($left, $prec - .00001); | |
1755 | } else { | |
1756 | return $self->deparse($left, $prec); | |
1757 | } | |
1758 | } | |
1759 | ||
1760 | # Right associative operators, like `=', for which | |
1761 | # $a = $b = $c is equivalent to $a = ($b = $c) | |
1762 | ||
1763 | BEGIN { | |
3f872cb9 GS |
1764 | %right = ('pow' => 22, |
1765 | 'sassign=' => 7, 'aassign=' => 7, | |
1766 | 'multiply=' => 7, 'i_multiply=' => 7, | |
1767 | 'divide=' => 7, 'i_divide=' => 7, | |
1768 | 'modulo=' => 7, 'i_modulo=' => 7, | |
1769 | 'repeat=' => 7, | |
1770 | 'add=' => 7, 'i_add=' => 7, | |
1771 | 'subtract=' => 7, 'i_subtract=' => 7, | |
1772 | 'concat=' => 7, | |
1773 | 'left_shift=' => 7, 'right_shift=' => 7, | |
1774 | 'bit_and=' => 7, | |
1775 | 'bit_or=' => 7, 'bit_xor=' => 7, | |
1776 | 'andassign' => 7, | |
1777 | 'orassign' => 7, | |
9d2c6865 SM |
1778 | ); |
1779 | } | |
1780 | ||
1781 | sub deparse_binop_right { | |
1782 | my $self = shift; | |
1783 | my($op, $right, $prec) = @_; | |
58231d39 | 1784 | if ($right{assoc_class($op)} && $right{assoc_class($right)} |
9d2c6865 SM |
1785 | and $right{assoc_class($op)} == $right{assoc_class($right)}) |
1786 | { | |
1787 | return $self->deparse($right, $prec - .00001); | |
1788 | } else { | |
1789 | return $self->deparse($right, $prec); | |
1790 | } | |
1791 | } | |
1792 | ||
a798dbf2 | 1793 | sub binop { |
6e90668e | 1794 | my $self = shift; |
9d2c6865 | 1795 | my ($op, $cx, $opname, $prec, $flags) = (@_, 0); |
a798dbf2 MB |
1796 | my $left = $op->first; |
1797 | my $right = $op->last; | |
9d2c6865 SM |
1798 | my $eq = ""; |
1799 | if ($op->flags & OPf_STACKED && $flags & ASSIGN) { | |
1800 | $eq = "="; | |
1801 | $prec = 7; | |
1802 | } | |
a798dbf2 MB |
1803 | if ($flags & SWAP_CHILDREN) { |
1804 | ($left, $right) = ($right, $left); | |
1805 | } | |
9d2c6865 | 1806 | $left = $self->deparse_binop_left($op, $left, $prec); |
90c0eb26 RH |
1807 | $left = "($left)" if $flags & LIST_CONTEXT |
1808 | && $left !~ /^(my|our|local|)[\@\(]/; | |
9d2c6865 SM |
1809 | $right = $self->deparse_binop_right($op, $right, $prec); |
1810 | return $self->maybe_parens("$left $opname$eq $right", $cx, $prec); | |
1811 | } | |
1812 | ||
3ed82cfc GS |
1813 | sub pp_add { maybe_targmy(@_, \&binop, "+", 18, ASSIGN) } |
1814 | sub pp_multiply { maybe_targmy(@_, \&binop, "*", 19, ASSIGN) } | |
1815 | sub pp_subtract { maybe_targmy(@_, \&binop, "-",18, ASSIGN) } | |
1816 | sub pp_divide { maybe_targmy(@_, \&binop, "/", 19, ASSIGN) } | |
1817 | sub pp_modulo { maybe_targmy(@_, \&binop, "%", 19, ASSIGN) } | |
1818 | sub pp_i_add { maybe_targmy(@_, \&binop, "+", 18, ASSIGN) } | |
1819 | sub pp_i_multiply { maybe_targmy(@_, \&binop, "*", 19, ASSIGN) } | |
1820 | sub pp_i_subtract { maybe_targmy(@_, \&binop, "-", 18, ASSIGN) } | |
1821 | sub pp_i_divide { maybe_targmy(@_, \&binop, "/", 19, ASSIGN) } | |
1822 | sub pp_i_modulo { maybe_targmy(@_, \&binop, "%", 19, ASSIGN) } | |
1823 | sub pp_pow { maybe_targmy(@_, \&binop, "**", 22, ASSIGN) } | |
1824 | ||
1825 | sub pp_left_shift { maybe_targmy(@_, \&binop, "<<", 17, ASSIGN) } | |
1826 | sub pp_right_shift { maybe_targmy(@_, \&binop, ">>", 17, ASSIGN) } | |
1827 | sub pp_bit_and { maybe_targmy(@_, \&binop, "&", 13, ASSIGN) } | |
1828 | sub pp_bit_or { maybe_targmy(@_, \&binop, "|", 12, ASSIGN) } | |
1829 | sub pp_bit_xor { maybe_targmy(@_, \&binop, "^", 12, ASSIGN) } | |
9d2c6865 SM |
1830 | |
1831 | sub pp_eq { binop(@_, "==", 14) } | |
1832 | sub pp_ne { binop(@_, "!=", 14) } | |
1833 | sub pp_lt { binop(@_, "<", 15) } | |
1834 | sub pp_gt { binop(@_, ">", 15) } | |
1835 | sub pp_ge { binop(@_, ">=", 15) } | |
1836 | sub pp_le { binop(@_, "<=", 15) } | |
1837 | sub pp_ncmp { binop(@_, "<=>", 14) } | |
1838 | sub pp_i_eq { binop(@_, "==", 14) } | |
1839 | sub pp_i_ne { binop(@_, "!=", 14) } | |
1840 | sub pp_i_lt { binop(@_, "<", 15) } | |
1841 | sub pp_i_gt { binop(@_, ">", 15) } | |
1842 | sub pp_i_ge { binop(@_, ">=", 15) } | |
1843 | sub pp_i_le { binop(@_, "<=", 15) } | |
1844 | sub pp_i_ncmp { binop(@_, "<=>", 14) } | |
1845 | ||
1846 | sub pp_seq { binop(@_, "eq", 14) } | |
1847 | sub pp_sne { binop(@_, "ne", 14) } | |
1848 | sub pp_slt { binop(@_, "lt", 15) } | |
1849 | sub pp_sgt { binop(@_, "gt", 15) } | |
1850 | sub pp_sge { binop(@_, "ge", 15) } | |
1851 | sub pp_sle { binop(@_, "le", 15) } | |
1852 | sub pp_scmp { binop(@_, "cmp", 14) } | |
1853 | ||
1854 | sub pp_sassign { binop(@_, "=", 7, SWAP_CHILDREN) } | |
7013e6ae | 1855 | sub pp_aassign { binop(@_, "=", 7, SWAP_CHILDREN | LIST_CONTEXT) } |
6e90668e SM |
1856 | |
1857 | # `.' is special because concats-of-concats are optimized to save copying | |
1858 | # by making all but the first concat stacked. The effect is as if the | |
1859 | # programmer had written `($a . $b) .= $c', except legal. | |
3ed82cfc GS |
1860 | sub pp_concat { maybe_targmy(@_, \&real_concat) } |
1861 | sub real_concat { | |
6e90668e | 1862 | my $self = shift; |
9d2c6865 | 1863 | my($op, $cx) = @_; |
6e90668e SM |
1864 | my $left = $op->first; |
1865 | my $right = $op->last; | |
1866 | my $eq = ""; | |
9d2c6865 | 1867 | my $prec = 18; |
3f872cb9 | 1868 | if ($op->flags & OPf_STACKED and $op->first->name ne "concat") { |
6e90668e | 1869 | $eq = "="; |
9d2c6865 | 1870 | $prec = 7; |
6e90668e | 1871 | } |
9d2c6865 SM |
1872 | $left = $self->deparse_binop_left($op, $left, $prec); |
1873 | $right = $self->deparse_binop_right($op, $right, $prec); | |
1874 | return $self->maybe_parens("$left .$eq $right", $cx, $prec); | |
6e90668e SM |
1875 | } |
1876 | ||
1877 | # `x' is weird when the left arg is a list | |
1878 | sub pp_repeat { | |
1879 | my $self = shift; | |
9d2c6865 | 1880 | my($op, $cx) = @_; |
6e90668e SM |
1881 | my $left = $op->first; |
1882 | my $right = $op->last; | |
9d2c6865 SM |
1883 | my $eq = ""; |
1884 | my $prec = 19; | |
1885 | if ($op->flags & OPf_STACKED) { | |
1886 | $eq = "="; | |
1887 | $prec = 7; | |
1888 | } | |
6e90668e SM |
1889 | if (null($right)) { # list repeat; count is inside left-side ex-list |
1890 | my $kid = $left->first->sibling; # skip pushmark | |
1891 | my @exprs; | |
1892 | for (; !null($kid->sibling); $kid = $kid->sibling) { | |
9d2c6865 | 1893 | push @exprs, $self->deparse($kid, 6); |
6e90668e SM |
1894 | } |
1895 | $right = $kid; | |
1896 | $left = "(" . join(", ", @exprs). ")"; | |
1897 | } else { | |
9d2c6865 | 1898 | $left = $self->deparse_binop_left($op, $left, $prec); |
6e90668e | 1899 | } |
9d2c6865 SM |
1900 | $right = $self->deparse_binop_right($op, $right, $prec); |
1901 | return $self->maybe_parens("$left x$eq $right", $cx, $prec); | |
6e90668e SM |
1902 | } |
1903 | ||
1904 | sub range { | |
1905 | my $self = shift; | |
9d2c6865 | 1906 | my ($op, $cx, $type) = @_; |
6e90668e SM |
1907 | my $left = $op->first; |
1908 | my $right = $left->sibling; | |
9d2c6865 SM |
1909 | $left = $self->deparse($left, 9); |
1910 | $right = $self->deparse($right, 9); | |
1911 | return $self->maybe_parens("$left $type $right", $cx, 9); | |
6e90668e SM |
1912 | } |
1913 | ||
1914 | sub pp_flop { | |
1915 | my $self = shift; | |
9d2c6865 | 1916 | my($op, $cx) = @_; |
6e90668e SM |
1917 | my $flip = $op->first; |
1918 | my $type = ($flip->flags & OPf_SPECIAL) ? "..." : ".."; | |
9d2c6865 | 1919 | return $self->range($flip->first, $cx, $type); |
6e90668e SM |
1920 | } |
1921 | ||
1922 | # one-line while/until is handled in pp_leave | |
1923 | ||
1924 | sub logop { | |
1925 | my $self = shift; | |
9d2c6865 | 1926 | my ($op, $cx, $lowop, $lowprec, $highop, $highprec, $blockname) = @_; |
6e90668e SM |
1927 | my $left = $op->first; |
1928 | my $right = $op->first->sibling; | |
58cccf98 SM |
1929 | if ($cx == 0 and is_scope($right) and $blockname |
1930 | and $self->{'expand'} < 7) | |
1931 | { # if ($a) {$b} | |
9d2c6865 SM |
1932 | $left = $self->deparse($left, 1); |
1933 | $right = $self->deparse($right, 0); | |
1934 | return "$blockname ($left) {\n\t$right\n\b}\cK"; | |
58cccf98 SM |
1935 | } elsif ($cx == 0 and $blockname and not $self->{'parens'} |
1936 | and $self->{'expand'} < 7) { # $b if $a | |
9d2c6865 SM |
1937 | $right = $self->deparse($right, 1); |
1938 | $left = $self->deparse($left, 1); | |
1939 | return "$right $blockname $left"; | |
1940 | } elsif ($cx > $lowprec and $highop) { # $a && $b | |
1941 | $left = $self->deparse_binop_left($op, $left, $highprec); | |
1942 | $right = $self->deparse_binop_right($op, $right, $highprec); | |
1943 | return $self->maybe_parens("$left $highop $right", $cx, $highprec); | |
1944 | } else { # $a and $b | |
1945 | $left = $self->deparse_binop_left($op, $left, $lowprec); | |
1946 | $right = $self->deparse_binop_right($op, $right, $lowprec); | |
1947 | return $self->maybe_parens("$left $lowop $right", $cx, $lowprec); | |
1948 | } | |
1949 | } | |
1950 | ||
1951 | sub pp_and { logop(@_, "and", 3, "&&", 11, "if") } | |
f4a44678 | 1952 | sub pp_or { logop(@_, "or", 2, "||", 10, "unless") } |
3ed82cfc GS |
1953 | |
1954 | # xor is syntactically a logop, but it's really a binop (contrary to | |
1955 | # old versions of opcode.pl). Syntax is what matters here. | |
9d2c6865 | 1956 | sub pp_xor { logop(@_, "xor", 2, "", 0, "") } |
6e90668e SM |
1957 | |
1958 | sub logassignop { | |
1959 | my $self = shift; | |
9d2c6865 | 1960 | my ($op, $cx, $opname) = @_; |
6e90668e SM |
1961 | my $left = $op->first; |
1962 | my $right = $op->first->sibling->first; # skip sassign | |
9d2c6865 SM |
1963 | $left = $self->deparse($left, 7); |
1964 | $right = $self->deparse($right, 7); | |
1965 | return $self->maybe_parens("$left $opname $right", $cx, 7); | |
a798dbf2 MB |
1966 | } |
1967 | ||
6e90668e SM |
1968 | sub pp_andassign { logassignop(@_, "&&=") } |
1969 | sub pp_orassign { logassignop(@_, "||=") } | |
1970 | ||
1971 | sub listop { | |
1972 | my $self = shift; | |
9d2c6865 SM |
1973 | my($op, $cx, $name) = @_; |
1974 | my(@exprs); | |
1975 | my $parens = ($cx >= 5) || $self->{'parens'}; | |
1976 | my $kid = $op->first->sibling; | |
1977 | return $name if null $kid; | |
e31885a0 | 1978 | my $first; |
fb725297 | 1979 | $name = "socketpair" if $name eq "sockpair"; |
e31885a0 RH |
1980 | if (defined prototype("CORE::$name") |
1981 | && prototype("CORE::$name") =~ /^;?\*/ | |
1982 | && $kid->name eq "rv2gv") { | |
1983 | $first = $self->deparse($kid->first, 6); | |
1984 | } | |
1985 | else { | |
1986 | $first = $self->deparse($kid, 6); | |
1987 | } | |
e99ebc55 | 1988 | if ($name eq "chmod" && $first =~ /^\d+$/) { |
a0035eb8 | 1989 | $first = sprintf("%#o", $first); |
e99ebc55 | 1990 | } |
9d2c6865 SM |
1991 | $first = "+$first" if not $parens and substr($first, 0, 1) eq "("; |
1992 | push @exprs, $first; | |
1993 | $kid = $kid->sibling; | |
1994 | for (; !null($kid); $kid = $kid->sibling) { | |
1995 | push @exprs, $self->deparse($kid, 6); | |
1996 | } | |
1997 | if ($parens) { | |
1998 | return "$name(" . join(", ", @exprs) . ")"; | |
1999 | } else { | |
2000 | return "$name " . join(", ", @exprs); | |
6e90668e | 2001 | } |
6e90668e | 2002 | } |
a798dbf2 | 2003 | |
6e90668e | 2004 | sub pp_bless { listop(@_, "bless") } |
3ed82cfc | 2005 | sub pp_atan2 { maybe_targmy(@_, \&listop, "atan2") } |
6e90668e SM |
2006 | sub pp_substr { maybe_local(@_, listop(@_, "substr")) } |
2007 | sub pp_vec { maybe_local(@_, listop(@_, "vec")) } | |
3ed82cfc GS |
2008 | sub pp_index { maybe_targmy(@_, \&listop, "index") } |
2009 | sub pp_rindex { maybe_targmy(@_, \&listop, "rindex") } | |
2010 | sub pp_sprintf { maybe_targmy(@_, \&listop, "sprintf") } | |
6e90668e | 2011 | sub pp_formline { listop(@_, "formline") } # see also deparse_format |
3ed82cfc | 2012 | sub pp_crypt { maybe_targmy(@_, \&listop, "crypt") } |
6e90668e SM |
2013 | sub pp_unpack { listop(@_, "unpack") } |
2014 | sub pp_pack { listop(@_, "pack") } | |
3ed82cfc | 2015 | sub pp_join { maybe_targmy(@_, \&listop, "join") } |
6e90668e | 2016 | sub pp_splice { listop(@_, "splice") } |
3ed82cfc GS |
2017 | sub pp_push { maybe_targmy(@_, \&listop, "push") } |
2018 | sub pp_unshift { maybe_targmy(@_, \&listop, "unshift") } | |
6e90668e SM |
2019 | sub pp_reverse { listop(@_, "reverse") } |
2020 | sub pp_warn { listop(@_, "warn") } | |
2021 | sub pp_die { listop(@_, "die") } | |
9d2c6865 SM |
2022 | # Actually, return is exempt from the LLAFR (see examples in this very |
2023 | # module!), but for consistency's sake, ignore that fact | |
6e90668e SM |
2024 | sub pp_return { listop(@_, "return") } |
2025 | sub pp_open { listop(@_, "open") } | |
2026 | sub pp_pipe_op { listop(@_, "pipe") } | |
2027 | sub pp_tie { listop(@_, "tie") } | |
82bafd27 | 2028 | sub pp_binmode { listop(@_, "binmode") } |
6e90668e SM |
2029 | sub pp_dbmopen { listop(@_, "dbmopen") } |
2030 | sub pp_sselect { listop(@_, "select") } | |
2031 | sub pp_select { listop(@_, "select") } | |
2032 | sub pp_read { listop(@_, "read") } | |
2033 | sub pp_sysopen { listop(@_, "sysopen") } | |
2034 | sub pp_sysseek { listop(@_, "sysseek") } | |
2035 | sub pp_sysread { listop(@_, "sysread") } | |
2036 | sub pp_syswrite { listop(@_, "syswrite") } | |
2037 | sub pp_send { listop(@_, "send") } | |
2038 | sub pp_recv { listop(@_, "recv") } | |
2039 | sub pp_seek { listop(@_, "seek") } | |
6e90668e SM |
2040 | sub pp_fcntl { listop(@_, "fcntl") } |
2041 | sub pp_ioctl { listop(@_, "ioctl") } | |
3ed82cfc | 2042 | sub pp_flock { maybe_targmy(@_, \&listop, "flock") } |
6e90668e SM |
2043 | sub pp_socket { listop(@_, "socket") } |
2044 | sub pp_sockpair { listop(@_, "sockpair") } | |
2045 | sub pp_bind { listop(@_, "bind") } | |
2046 | sub pp_connect { listop(@_, "connect") } | |
2047 | sub pp_listen { listop(@_, "listen") } | |
2048 | sub pp_accept { listop(@_, "accept") } | |
2049 | sub pp_shutdown { listop(@_, "shutdown") } | |
2050 | sub pp_gsockopt { listop(@_, "getsockopt") } | |
2051 | sub pp_ssockopt { listop(@_, "setsockopt") } | |
3ed82cfc GS |
2052 | sub pp_chown { maybe_targmy(@_, \&listop, "chown") } |
2053 | sub pp_unlink { maybe_targmy(@_, \&listop, "unlink") } | |
2054 | sub pp_chmod { maybe_targmy(@_, \&listop, "chmod") } | |
2055 | sub pp_utime { maybe_targmy(@_, \&listop, "utime") } | |
2056 | sub pp_rename { maybe_targmy(@_, \&listop, "rename") } | |
2057 | sub pp_link { maybe_targmy(@_, \&listop, "link") } | |
2058 | sub pp_symlink { maybe_targmy(@_, \&listop, "symlink") } | |
2059 | sub pp_mkdir { maybe_targmy(@_, \&listop, "mkdir") } | |
6e90668e SM |
2060 | sub pp_open_dir { listop(@_, "opendir") } |
2061 | sub pp_seekdir { listop(@_, "seekdir") } | |
3ed82cfc GS |
2062 | sub pp_waitpid { maybe_targmy(@_, \&listop, "waitpid") } |
2063 | sub pp_system { maybe_targmy(@_, \&listop, "system") } | |
2064 | sub pp_exec { maybe_targmy(@_, \&listop, "exec") } | |
2065 | sub pp_kill { maybe_targmy(@_, \&listop, "kill") } | |
2066 | sub pp_setpgrp { maybe_targmy(@_, \&listop, "setpgrp") } | |
2067 | sub pp_getpriority { maybe_targmy(@_, \&listop, "getpriority") } | |
2068 | sub pp_setpriority { maybe_targmy(@_, \&listop, "setpriority") } | |
6e90668e SM |
2069 | sub pp_shmget { listop(@_, "shmget") } |
2070 | sub pp_shmctl { listop(@_, "shmctl") } | |
2071 | sub pp_shmread { listop(@_, "shmread") } | |
2072 | sub pp_shmwrite { listop(@_, "shmwrite") } | |
2073 | sub pp_msgget { listop(@_, "msgget") } | |
2074 | sub pp_msgctl { listop(@_, "msgctl") } | |
2075 | sub pp_msgsnd { listop(@_, "msgsnd") } | |
2076 | sub pp_msgrcv { listop(@_, "msgrcv") } | |
2077 | sub pp_semget { listop(@_, "semget") } | |
2078 | sub pp_semctl { listop(@_, "semctl") } | |
2079 | sub pp_semop { listop(@_, "semop") } | |
2080 | sub pp_ghbyaddr { listop(@_, "gethostbyaddr") } | |
2081 | sub pp_gnbyaddr { listop(@_, "getnetbyaddr") } | |
2082 | sub pp_gpbynumber { listop(@_, "getprotobynumber") } | |
2083 | sub pp_gsbyname { listop(@_, "getservbyname") } | |
2084 | sub pp_gsbyport { listop(@_, "getservbyport") } | |
2085 | sub pp_syscall { listop(@_, "syscall") } | |
2086 | ||
2087 | sub pp_glob { | |
2088 | my $self = shift; | |
9d2c6865 | 2089 | my($op, $cx) = @_; |
6e90668e SM |
2090 | my $text = $self->dq($op->first->sibling); # skip pushmark |
2091 | if ($text =~ /^\$?(\w|::|\`)+$/ # could look like a readline | |
2092 | or $text =~ /[<>]/) { | |
2093 | return 'glob(' . single_delim('qq', '"', $text) . ')'; | |
2094 | } else { | |
2095 | return '<' . $text . '>'; | |
2096 | } | |
2097 | } | |
2098 | ||
f5aa8f4e SM |
2099 | # Truncate is special because OPf_SPECIAL makes a bareword first arg |
2100 | # be a filehandle. This could probably be better fixed in the core | |
2101 | # by moving the GV lookup into ck_truc. | |
2102 | ||
2103 | sub pp_truncate { | |
2104 | my $self = shift; | |
2105 | my($op, $cx) = @_; | |
2106 | my(@exprs); | |
2107 | my $parens = ($cx >= 5) || $self->{'parens'}; | |
2108 | my $kid = $op->first->sibling; | |
acba1d67 | 2109 | my $fh; |
f5aa8f4e SM |
2110 | if ($op->flags & OPf_SPECIAL) { |
2111 | # $kid is an OP_CONST | |
18228111 | 2112 | $fh = $self->const_sv($kid)->PV; |
f5aa8f4e SM |
2113 | } else { |
2114 | $fh = $self->deparse($kid, 6); | |
2115 | $fh = "+$fh" if not $parens and substr($fh, 0, 1) eq "("; | |
2116 | } | |
2117 | my $len = $self->deparse($kid->sibling, 6); | |
2118 | if ($parens) { | |
2119 | return "truncate($fh, $len)"; | |
2120 | } else { | |
2121 | return "truncate $fh, $len"; | |
2122 | } | |
f5aa8f4e SM |
2123 | } |
2124 | ||
6e90668e SM |
2125 | sub indirop { |
2126 | my $self = shift; | |
9d2c6865 | 2127 | my($op, $cx, $name) = @_; |
6e90668e SM |
2128 | my($expr, @exprs); |
2129 | my $kid = $op->first->sibling; | |
2130 | my $indir = ""; | |
2131 | if ($op->flags & OPf_STACKED) { | |
2132 | $indir = $kid; | |
2133 | $indir = $indir->first; # skip rv2gv | |
2134 | if (is_scope($indir)) { | |
9d2c6865 | 2135 | $indir = "{" . $self->deparse($indir, 0) . "}"; |
c73811ab RH |
2136 | } elsif ($indir->name eq "const" && $indir->private & OPpCONST_BARE) { |
2137 | $indir = $self->const_sv($indir)->PV; | |
6e90668e | 2138 | } else { |
9d2c6865 | 2139 | $indir = $self->deparse($indir, 24); |
6e90668e SM |
2140 | } |
2141 | $indir = $indir . " "; | |
2142 | $kid = $kid->sibling; | |
2143 | } | |
7e80da18 RH |
2144 | if ($name eq "sort" && $op->private & (OPpSORT_NUMERIC | OPpSORT_INTEGER)) { |
2145 | $indir = ($op->private & OPpSORT_REVERSE) ? '{$b <=> $a} ' | |
2146 | : '{$a <=> $b} '; | |
2147 | } | |
2148 | elsif ($name eq "sort" && $op->private & OPpSORT_REVERSE) { | |
2149 | $indir = '{$b cmp $a} '; | |
2150 | } | |
6e90668e | 2151 | for (; !null($kid); $kid = $kid->sibling) { |
9d2c6865 | 2152 | $expr = $self->deparse($kid, 6); |
6e90668e SM |
2153 | push @exprs, $expr; |
2154 | } | |
3ed82cfc | 2155 | return $self->maybe_parens_func($name, $indir . join(", ", @exprs), |
9d2c6865 | 2156 | $cx, 5); |
6e90668e SM |
2157 | } |
2158 | ||
2159 | sub pp_prtf { indirop(@_, "printf") } | |
2160 | sub pp_print { indirop(@_, "print") } | |
2161 | sub pp_sort { indirop(@_, "sort") } | |
2162 | ||
2163 | sub mapop { | |
2164 | my $self = shift; | |
9d2c6865 | 2165 | my($op, $cx, $name) = @_; |
6e90668e SM |
2166 | my($expr, @exprs); |
2167 | my $kid = $op->first; # this is the (map|grep)start | |
2168 | $kid = $kid->first->sibling; # skip a pushmark | |
2169 | my $code = $kid->first; # skip a null | |
2170 | if (is_scope $code) { | |
f4a44678 | 2171 | $code = "{" . $self->deparse($code, 0) . "} "; |
6e90668e | 2172 | } else { |
9d2c6865 | 2173 | $code = $self->deparse($code, 24) . ", "; |
6e90668e SM |
2174 | } |
2175 | $kid = $kid->sibling; | |
2176 | for (; !null($kid); $kid = $kid->sibling) { | |
9d2c6865 | 2177 | $expr = $self->deparse($kid, 6); |
9a58b761 | 2178 | push @exprs, $expr if defined $expr; |
6e90668e | 2179 | } |
9d2c6865 | 2180 | return $self->maybe_parens_func($name, $code . join(", ", @exprs), $cx, 5); |
6e90668e SM |
2181 | } |
2182 | ||
2183 | sub pp_mapwhile { mapop(@_, "map") } | |
2184 | sub pp_grepwhile { mapop(@_, "grep") } | |
2185 | ||
2186 | sub pp_list { | |
2187 | my $self = shift; | |
9d2c6865 | 2188 | my($op, $cx) = @_; |
6e90668e SM |
2189 | my($expr, @exprs); |
2190 | my $kid = $op->first->sibling; # skip pushmark | |
2191 | my $lop; | |
ce4e655d | 2192 | my $local = "either"; # could be local(...), my(...) or our(...) |
6e90668e SM |
2193 | for ($lop = $kid; !null($lop); $lop = $lop->sibling) { |
2194 | # This assumes that no other private flags equal 128, and that | |
2195 | # OPs that store things other than flags in their op_private, | |
2196 | # like OP_AELEMFAST, won't be immediate children of a list. | |
b8e103fc RH |
2197 | # |
2198 | # OP_ENTERSUB can break this logic, so check for it. | |
2199 | # I suspect that open and exit can too. | |
2200 | ||
2201 | if (!($lop->private & (OPpLVAL_INTRO|OPpOUR_INTRO) | |
ce4e655d | 2202 | or $lop->name eq "undef") |
b8e103fc RH |
2203 | or $lop->name eq "entersub" |
2204 | or $lop->name eq "exit" | |
2205 | or $lop->name eq "open") | |
6e90668e SM |
2206 | { |
2207 | $local = ""; # or not | |
2208 | last; | |
2209 | } | |
3f872cb9 | 2210 | if ($lop->name =~ /^pad[ash]v$/) { # my() |
ce4e655d | 2211 | ($local = "", last) if $local eq "local" || $local eq "our"; |
6e90668e | 2212 | $local = "my"; |
b8e103fc RH |
2213 | } elsif ($lop->name =~ /^(gv|rv2)[ash]v$/ |
2214 | && $lop->private & OPpOUR_INTRO | |
2215 | or $lop->name eq "null" && $lop->first->name eq "gvsv" | |
2216 | && $lop->first->private & OPpOUR_INTRO) { # our() | |
ce4e655d RH |
2217 | ($local = "", last) if $local eq "my" || $local eq "local"; |
2218 | $local = "our"; | |
3f872cb9 | 2219 | } elsif ($lop->name ne "undef") { # local() |
ce4e655d | 2220 | ($local = "", last) if $local eq "my" || $local eq "our"; |
6e90668e SM |
2221 | $local = "local"; |
2222 | } | |
2223 | } | |
2224 | $local = "" if $local eq "either"; # no point if it's all undefs | |
f5aa8f4e | 2225 | return $self->deparse($kid, $cx) if null $kid->sibling and not $local; |
6e90668e SM |
2226 | for (; !null($kid); $kid = $kid->sibling) { |
2227 | if ($local) { | |
3f872cb9 | 2228 | if (class($kid) eq "UNOP" and $kid->first->name eq "gvsv") { |
6e90668e SM |
2229 | $lop = $kid->first; |
2230 | } else { | |
2231 | $lop = $kid; | |
2232 | } | |
2233 | $self->{'avoid_local'}{$$lop}++; | |
9d2c6865 | 2234 | $expr = $self->deparse($kid, 6); |
6e90668e SM |
2235 | delete $self->{'avoid_local'}{$$lop}; |
2236 | } else { | |
9d2c6865 | 2237 | $expr = $self->deparse($kid, 6); |
6e90668e SM |
2238 | } |
2239 | push @exprs, $expr; | |
2240 | } | |
9d2c6865 SM |
2241 | if ($local) { |
2242 | return "$local(" . join(", ", @exprs) . ")"; | |
2243 | } else { | |
2244 | return $self->maybe_parens( join(", ", @exprs), $cx, 6); | |
2245 | } | |
6e90668e SM |
2246 | } |
2247 | ||
6f611a1a GS |
2248 | sub is_ifelse_cont { |
2249 | my $op = shift; | |
2250 | return ($op->name eq "null" and class($op) eq "UNOP" | |
2251 | and $op->first->name =~ /^(and|cond_expr)$/ | |
2252 | and is_scope($op->first->first->sibling)); | |
2253 | } | |
2254 | ||
6e90668e SM |
2255 | sub pp_cond_expr { |
2256 | my $self = shift; | |
9d2c6865 | 2257 | my($op, $cx) = @_; |
6e90668e SM |
2258 | my $cond = $op->first; |
2259 | my $true = $cond->sibling; | |
2260 | my $false = $true->sibling; | |
9d2c6865 | 2261 | my $cuddle = $self->{'cuddle'}; |
6f611a1a | 2262 | unless ($cx == 0 and (is_scope($true) and $true->name ne "null") and |
58cccf98 SM |
2263 | (is_scope($false) || is_ifelse_cont($false)) |
2264 | and $self->{'expand'} < 7) { | |
f5aa8f4e | 2265 | $cond = $self->deparse($cond, 8); |
9d2c6865 SM |
2266 | $true = $self->deparse($true, 8); |
2267 | $false = $self->deparse($false, 8); | |
2268 | return $self->maybe_parens("$cond ? $true : $false", $cx, 8); | |
6f611a1a GS |
2269 | } |
2270 | ||
f5aa8f4e | 2271 | $cond = $self->deparse($cond, 1); |
9d2c6865 | 2272 | $true = $self->deparse($true, 0); |
6f611a1a GS |
2273 | my $head = "if ($cond) {\n\t$true\n\b}"; |
2274 | my @elsifs; | |
2275 | while (!null($false) and is_ifelse_cont($false)) { | |
2276 | my $newop = $false->first; | |
2277 | my $newcond = $newop->first; | |
2278 | my $newtrue = $newcond->sibling; | |
2279 | $false = $newtrue->sibling; # last in chain is OP_AND => no else | |
2280 | $newcond = $self->deparse($newcond, 1); | |
2281 | $newtrue = $self->deparse($newtrue, 0); | |
2282 | push @elsifs, "elsif ($newcond) {\n\t$newtrue\n\b}"; | |
2283 | } | |
2284 | if (!null($false)) { | |
2285 | $false = $cuddle . "else {\n\t" . | |
2286 | $self->deparse($false, 0) . "\n\b}\cK"; | |
2287 | } else { | |
2288 | $false = "\cK"; | |
6e90668e | 2289 | } |
6f611a1a | 2290 | return $head . join($cuddle, "", @elsifs) . $false; |
6e90668e SM |
2291 | } |
2292 | ||
58cccf98 | 2293 | sub loop_common { |
6e90668e | 2294 | my $self = shift; |
58cccf98 | 2295 | my($op, $cx, $init) = @_; |
6e90668e SM |
2296 | my $enter = $op->first; |
2297 | my $kid = $enter->sibling; | |
a0405c92 RH |
2298 | local(@$self{qw'curstash warnings hints'}) |
2299 | = @$self{qw'curstash warnings hints'}; | |
6e90668e | 2300 | my $head = ""; |
9d2c6865 | 2301 | my $bare = 0; |
58cccf98 SM |
2302 | my $body; |
2303 | my $cond = undef; | |
3f872cb9 | 2304 | if ($kid->name eq "lineseq") { # bare or infinite loop |
6e90668e | 2305 | if (is_state $kid->last) { # infinite |
e99ebc55 | 2306 | $head = "while (1) "; # Can't use for(;;) if there's a continue |
58cccf98 | 2307 | $cond = ""; |
9d2c6865 SM |
2308 | } else { |
2309 | $bare = 1; | |
6e90668e | 2310 | } |
58cccf98 | 2311 | $body = $kid; |
3f872cb9 | 2312 | } elsif ($enter->name eq "enteriter") { # foreach |
6e90668e SM |
2313 | my $ary = $enter->first->sibling; # first was pushmark |
2314 | my $var = $ary->sibling; | |
f5aa8f4e SM |
2315 | if ($enter->flags & OPf_STACKED |
2316 | and not null $ary->first->sibling->sibling) | |
2317 | { | |
d7f5b6da SM |
2318 | $ary = $self->deparse($ary->first->sibling, 9) . " .. " . |
2319 | $self->deparse($ary->first->sibling->sibling, 9); | |
d8d95777 GA |
2320 | } else { |
2321 | $ary = $self->deparse($ary, 1); | |
2322 | } | |
6e90668e | 2323 | if (null $var) { |
f6f9bdb7 | 2324 | if ($enter->flags & OPf_SPECIAL) { # thread special var |
9d2c6865 | 2325 | $var = $self->pp_threadsv($enter, 1); |
f6f9bdb7 | 2326 | } else { # regular my() variable |
9d2c6865 | 2327 | $var = $self->pp_padsv($enter, 1); |
f6f9bdb7 SM |
2328 | if ($self->padname_sv($enter->targ)->IVX == |
2329 | $kid->first->first->sibling->last->cop_seq) | |
2330 | { | |
2331 | # If the scope of this variable closes at the last | |
2332 | # statement of the loop, it must have been | |
2333 | # declared here. | |
2334 | $var = "my " . $var; | |
2335 | } | |
6e90668e | 2336 | } |
3f872cb9 | 2337 | } elsif ($var->name eq "rv2gv") { |
9d2c6865 | 2338 | $var = $self->pp_rv2sv($var, 1); |
3f872cb9 | 2339 | } elsif ($var->name eq "gv") { |
9d2c6865 | 2340 | $var = "\$" . $self->deparse($var, 1); |
6e90668e | 2341 | } |
9d2c6865 | 2342 | $head = "foreach $var ($ary) "; |
58cccf98 | 2343 | $body = $kid->first->first->sibling; # skip OP_AND and OP_ITER |
3f872cb9 | 2344 | } elsif ($kid->name eq "null") { # while/until |
6e90668e | 2345 | $kid = $kid->first; |
58cccf98 SM |
2346 | my $name = {"and" => "while", "or" => "until"}->{$kid->name}; |
2347 | $cond = $self->deparse($kid->first, 1); | |
2348 | $head = "$name ($cond) "; | |
2349 | $body = $kid->first->sibling; | |
3f872cb9 | 2350 | } elsif ($kid->name eq "stub") { # bare and empty |
9d2c6865 | 2351 | return "{;}"; # {} could be a hashref |
6e90668e | 2352 | } |
58cccf98 SM |
2353 | # If there isn't a continue block, then the next pointer for the loop |
2354 | # will point to the unstack, which is kid's penultimate child, except | |
2355 | # in a bare loop, when it will point to the leaveloop. When neither of | |
2356 | # these conditions hold, then the third-to-last child in the continue | |
2357 | # block (or the last in a bare loop). | |
2358 | my $cont_start = $enter->nextop; | |
2359 | my $cont; | |
c73811ab | 2360 | if ($$cont_start != $$op && ${$cont_start->sibling} != ${$body->last}) { |
58cccf98 SM |
2361 | if ($bare) { |
2362 | $cont = $body->last; | |
2363 | } else { | |
2364 | $cont = $body->first; | |
2365 | while (!null($cont->sibling->sibling->sibling)) { | |
2366 | $cont = $cont->sibling; | |
2367 | } | |
2368 | } | |
2369 | my $state = $body->first; | |
2370 | my $cuddle = $self->{'cuddle'}; | |
2371 | my @states; | |
2372 | for (; $$state != $$cont; $state = $state->sibling) { | |
2373 | push @states, $state; | |
2374 | } | |
ce4e655d | 2375 | $body = $self->lineseq(undef, @states); |
58cccf98 SM |
2376 | if (defined $cond and not is_scope $cont and $self->{'expand'} < 3) { |
2377 | $head = "for ($init; $cond; " . $self->deparse($cont, 1) .") "; | |
2378 | $cont = "\cK"; | |
2379 | } else { | |
2380 | $cont = $cuddle . "continue {\n\t" . | |
2381 | $self->deparse($cont, 0) . "\n\b}\cK"; | |
6e90668e | 2382 | } |
6e90668e | 2383 | } else { |
7a9b44b9 | 2384 | return "" if !defined $body; |
c73811ab RH |
2385 | if (length $init) { |
2386 | $head = "for ($init; $cond;) "; | |
2387 | } | |
9d2c6865 | 2388 | $cont = "\cK"; |
58cccf98 | 2389 | $body = $self->deparse($body, 0); |
6e90668e | 2390 | } |
ce4e655d | 2391 | $body =~ s/;?$/;\n/; |
34a48b4b RH |
2392 | |
2393 | return $head . "{\n\t" . $body . "\b}" . $cont; | |
58cccf98 SM |
2394 | } |
2395 | ||
2396 | sub pp_leaveloop { loop_common(@_, "") } | |
2397 | ||
2398 | sub for_loop { | |
2399 | my $self = shift; | |
2400 | my($op, $cx) = @_; | |
2401 | my $init = $self->deparse($op, 1); | |
c73811ab | 2402 | return $self->loop_common($op->sibling->first->sibling, $cx, $init); |
6e90668e SM |
2403 | } |
2404 | ||
2405 | sub pp_leavetry { | |
2406 | my $self = shift; | |
9d2c6865 | 2407 | return "eval {\n\t" . $self->pp_leave(@_) . "\n\b}"; |
bd0865ec | 2408 | } |
6e90668e | 2409 | |
bd0865ec GS |
2410 | BEGIN { eval "sub OP_CONST () {" . opnumber("const") . "}" } |
2411 | BEGIN { eval "sub OP_STRINGIFY () {" . opnumber("stringify") . "}" } | |
a9760014 | 2412 | BEGIN { eval "sub OP_RV2SV () {" . opnumber("rv2sv") . "}" } |
90c0eb26 | 2413 | BEGIN { eval "sub OP_LIST () {" . opnumber("list") . "}" } |
f5aa8f4e | 2414 | |
a798dbf2 | 2415 | sub pp_null { |
6e90668e | 2416 | my $self = shift; |
9d2c6865 | 2417 | my($op, $cx) = @_; |
6e90668e | 2418 | if (class($op) eq "OP") { |
f4a44678 SM |
2419 | # old value is lost |
2420 | return $self->{'ex_const'} if $op->targ == OP_CONST; | |
3f872cb9 | 2421 | } elsif ($op->first->name eq "pushmark") { |
9d2c6865 | 2422 | return $self->pp_list($op, $cx); |
3f872cb9 | 2423 | } elsif ($op->first->name eq "enter") { |
9d2c6865 | 2424 | return $self->pp_leave($op, $cx); |
bd0865ec | 2425 | } elsif ($op->targ == OP_STRINGIFY) { |
6f611a1a | 2426 | return $self->dquote($op, $cx); |
6e90668e | 2427 | } elsif (!null($op->first->sibling) and |
3f872cb9 | 2428 | $op->first->sibling->name eq "readline" and |
6e90668e | 2429 | $op->first->sibling->flags & OPf_STACKED) { |
9d2c6865 SM |
2430 | return $self->maybe_parens($self->deparse($op->first, 7) . " = " |
2431 | . $self->deparse($op->first->sibling, 7), | |
2432 | $cx, 7); | |
6e90668e | 2433 | } elsif (!null($op->first->sibling) and |
3f872cb9 | 2434 | $op->first->sibling->name eq "trans" and |
6e90668e | 2435 | $op->first->sibling->flags & OPf_STACKED) { |
9d2c6865 SM |
2436 | return $self->maybe_parens($self->deparse($op->first, 20) . " =~ " |
2437 | . $self->deparse($op->first->sibling, 20), | |
2438 | $cx, 20); | |
c102638c RH |
2439 | } elsif ($op->flags & OPf_SPECIAL && $cx == 0 && !$op->targ) { |
2440 | return "do {\n\t". $self->deparse($op->first, $cx) ."\n\b};"; | |
ad8caead RGS |
2441 | } elsif (!null($op->first->sibling) and |
2442 | $op->first->sibling->name eq "null" and | |
2443 | class($op->first->sibling) eq "UNOP" and | |
2444 | $op->first->sibling->first->flags & OPf_STACKED and | |
2445 | $op->first->sibling->first->name eq "rcatline") { | |
2446 | return $self->maybe_parens($self->deparse($op->first, 18) . " .= " | |
2447 | . $self->deparse($op->first->sibling, 18), | |
2448 | $cx, 18); | |
6e90668e | 2449 | } else { |
9d2c6865 | 2450 | return $self->deparse($op->first, $cx); |
6e90668e | 2451 | } |
a798dbf2 MB |
2452 | } |
2453 | ||
6e90668e SM |
2454 | sub padname { |
2455 | my $self = shift; | |
2456 | my $targ = shift; | |
68223ea3 | 2457 | return $self->padname_sv($targ)->PVX; |
6e90668e SM |
2458 | } |
2459 | ||
2460 | sub padany { | |
2461 | my $self = shift; | |
2462 | my $op = shift; | |
2463 | return substr($self->padname($op->targ), 1); # skip $/@/% | |
2464 | } | |
2465 | ||
2466 | sub pp_padsv { | |
2467 | my $self = shift; | |
9d2c6865 SM |
2468 | my($op, $cx) = @_; |
2469 | return $self->maybe_my($op, $cx, $self->padname($op->targ)); | |
6e90668e SM |
2470 | } |
2471 | ||
2472 | sub pp_padav { pp_padsv(@_) } | |
2473 | sub pp_padhv { pp_padsv(@_) } | |
2474 | ||
9d2c6865 SM |
2475 | my @threadsv_names; |
2476 | ||
2477 | BEGIN { | |
2478 | @threadsv_names = ("_", "1", "2", "3", "4", "5", "6", "7", "8", "9", | |
2479 | "&", "`", "'", "+", "/", ".", ",", "\\", '"', ";", | |
2480 | "^", "-", "%", "=", "|", "~", ":", "^A", "^E", | |
2481 | "!", "@"); | |
2482 | } | |
f6f9bdb7 SM |
2483 | |
2484 | sub pp_threadsv { | |
2485 | my $self = shift; | |
9d2c6865 SM |
2486 | my($op, $cx) = @_; |
2487 | return $self->maybe_local($op, $cx, "\$" . $threadsv_names[$op->targ]); | |
f6f9bdb7 SM |
2488 | } |
2489 | ||
6f611a1a | 2490 | sub gv_or_padgv { |
18228111 GS |
2491 | my $self = shift; |
2492 | my $op = shift; | |
6f611a1a GS |
2493 | if (class($op) eq "PADOP") { |
2494 | return $self->padval($op->padix); | |
2495 | } else { # class($op) eq "SVOP" | |
2496 | return $op->gv; | |
18228111 | 2497 | } |
18228111 GS |
2498 | } |
2499 | ||
6e90668e SM |
2500 | sub pp_gvsv { |
2501 | my $self = shift; | |
9d2c6865 | 2502 | my($op, $cx) = @_; |
6f611a1a | 2503 | my $gv = $self->gv_or_padgv($op); |
8510e997 RH |
2504 | return $self->maybe_local($op, $cx, $self->stash_variable("\$", |
2505 | $self->gv_name($gv))); | |
6e90668e SM |
2506 | } |
2507 | ||
2508 | sub pp_gv { | |
2509 | my $self = shift; | |
9d2c6865 | 2510 | my($op, $cx) = @_; |
6f611a1a | 2511 | my $gv = $self->gv_or_padgv($op); |
18228111 | 2512 | return $self->gv_name($gv); |
6e90668e SM |
2513 | } |
2514 | ||
2515 | sub pp_aelemfast { | |
2516 | my $self = shift; | |
9d2c6865 | 2517 | my($op, $cx) = @_; |
6f611a1a | 2518 | my $gv = $self->gv_or_padgv($op); |
ce4e655d RH |
2519 | my $name = $self->gv_name($gv); |
2520 | $name = $self->{'curstash'}."::$name" | |
2521 | if $name !~ /::/ && $self->lex_in_scope('@'.$name); | |
2522 | ||
2523 | return "\$" . $name . "[" . | |
7a9b44b9 | 2524 | ($op->private + $self->{'arybase'}) . "]"; |
6e90668e SM |
2525 | } |
2526 | ||
2527 | sub rv2x { | |
2528 | my $self = shift; | |
9d2c6865 | 2529 | my($op, $cx, $type) = @_; |
90c0eb26 RH |
2530 | |
2531 | if (class($op) eq 'NULL' || !$op->can("first")) { | |
ff97752d | 2532 | carp("Unexpected op in pp_rv2x"); |
90c0eb26 RH |
2533 | return 'XXX'; |
2534 | } | |
6e90668e | 2535 | my $kid = $op->first; |
f5aa8f4e | 2536 | my $str = $self->deparse($kid, 0); |
8510e997 RH |
2537 | return $self->stash_variable($type, $str) if is_scalar($kid); |
2538 | return $type ."{$str}"; | |
6e90668e SM |
2539 | } |
2540 | ||
2541 | sub pp_rv2sv { maybe_local(@_, rv2x(@_, "\$")) } | |
2542 | sub pp_rv2hv { maybe_local(@_, rv2x(@_, "%")) } | |
2543 | sub pp_rv2gv { maybe_local(@_, rv2x(@_, "*")) } | |
2544 | ||
2545 | # skip rv2av | |
2546 | sub pp_av2arylen { | |
2547 | my $self = shift; | |
9d2c6865 | 2548 | my($op, $cx) = @_; |
3f872cb9 | 2549 | if ($op->first->name eq "padav") { |
9d2c6865 | 2550 | return $self->maybe_local($op, $cx, '$#' . $self->padany($op->first)); |
6e90668e | 2551 | } else { |
f5aa8f4e SM |
2552 | return $self->maybe_local($op, $cx, |
2553 | $self->rv2x($op->first, $cx, '$#')); | |
6e90668e SM |
2554 | } |
2555 | } | |
2556 | ||
2557 | # skip down to the old, ex-rv2cv | |
90c0eb26 RH |
2558 | sub pp_rv2cv { |
2559 | my ($self, $op, $cx) = @_; | |
2560 | if (!null($op->first) && $op->first->name eq 'null' && | |
2561 | $op->first->targ eq OP_LIST) | |
2562 | { | |
2563 | return $self->rv2x($op->first->first->sibling, $cx, "&") | |
2564 | } | |
2565 | else { | |
2566 | return $self->rv2x($op, $cx, "") | |
2567 | } | |
2568 | } | |
6e90668e SM |
2569 | |
2570 | sub pp_rv2av { | |
2571 | my $self = shift; | |
9d2c6865 | 2572 | my($op, $cx) = @_; |
6e90668e | 2573 | my $kid = $op->first; |
3f872cb9 | 2574 | if ($kid->name eq "const") { # constant list |
18228111 | 2575 | my $av = $self->const_sv($kid); |
6e90668e SM |
2576 | return "(" . join(", ", map(const($_), $av->ARRAY)) . ")"; |
2577 | } else { | |
9d2c6865 | 2578 | return $self->maybe_local($op, $cx, $self->rv2x($op, $cx, "\@")); |
6e90668e SM |
2579 | } |
2580 | } | |
2581 | ||
3ed82cfc GS |
2582 | sub is_subscriptable { |
2583 | my $op = shift; | |
2584 | if ($op->name =~ /^[ahg]elem/) { | |
2585 | return 1; | |
2586 | } elsif ($op->name eq "entersub") { | |
2587 | my $kid = $op->first; | |
2588 | return 0 unless null $kid->sibling; | |
2589 | $kid = $kid->first; | |
2590 | $kid = $kid->sibling until null $kid->sibling; | |
2591 | return 0 if is_scope($kid); | |
2592 | $kid = $kid->first; | |
2593 | return 0 if $kid->name eq "gv"; | |
2594 | return 0 if is_scalar($kid); | |
2595 | return is_subscriptable($kid); | |
2596 | } else { | |
2597 | return 0; | |
2598 | } | |
2599 | } | |
6e90668e SM |
2600 | |
2601 | sub elem { | |
2602 | my $self = shift; | |
9d2c6865 | 2603 | my ($op, $cx, $left, $right, $padname) = @_; |
6e90668e | 2604 | my($array, $idx) = ($op->first, $op->first->sibling); |
3f872cb9 | 2605 | unless ($array->name eq $padname) { # Maybe this has been fixed |
6e90668e SM |
2606 | $array = $array->first; # skip rv2av (or ex-rv2av in _53+) |
2607 | } | |
3f872cb9 | 2608 | if ($array->name eq $padname) { |
6e90668e SM |
2609 | $array = $self->padany($array); |
2610 | } elsif (is_scope($array)) { # ${expr}[0] | |
9d2c6865 | 2611 | $array = "{" . $self->deparse($array, 0) . "}"; |
ce4e655d RH |
2612 | } elsif ($array->name eq "gv") { |
2613 | $array = $self->gv_name($self->gv_or_padgv($array)); | |
2614 | if ($array !~ /::/) { | |
2615 | my $prefix = ($left eq '[' ? '@' : '%'); | |
2616 | $array = $self->{curstash}.'::'.$array | |
2617 | if $self->lex_in_scope($prefix . $array); | |
2618 | } | |
6e90668e | 2619 | } elsif (is_scalar $array) { # $x[0], $$x[0], ... |
9d2c6865 | 2620 | $array = $self->deparse($array, 24); |
6e90668e SM |
2621 | } else { |
2622 | # $x[20][3]{hi} or expr->[20] | |
3ed82cfc | 2623 | my $arrow = is_subscriptable($array) ? "" : "->"; |
9d2c6865 SM |
2624 | return $self->deparse($array, 24) . $arrow . |
2625 | $left . $self->deparse($idx, 1) . $right; | |
6e90668e | 2626 | } |
9d2c6865 | 2627 | $idx = $self->deparse($idx, 1); |
7a9b44b9 RH |
2628 | |
2629 | # Outer parens in an array index will confuse perl | |
2630 | # if we're interpolating in a regular expression, i.e. | |
2631 | # /$x$foo[(-1)]/ is *not* the same as /$x$foo[-1]/ | |
2632 | # | |
2633 | # If $self->{parens}, then an initial '(' will | |
2634 | # definitely be paired with a final ')'. If | |
2635 | # !$self->{parens}, the misleading parens won't | |
2636 | # have been added in the first place. | |
2637 | # | |
2638 | # [You might think that we could get "(...)...(...)" | |
2639 | # where the initial and final parens do not match | |
2640 | # each other. But we can't, because the above would | |
2641 | # only happen if there's an infix binop between the | |
2642 | # two pairs of parens, and *that* means that the whole | |
2643 | # expression would be parenthesized as well.] | |
2644 | # | |
2645 | $idx =~ s/^\((.*)\)$/$1/ if $self->{'parens'}; | |
2646 | ||
098251bc RH |
2647 | # Hash-element braces will autoquote a bareword inside themselves. |
2648 | # We need to make sure that C<$hash{warn()}> doesn't come out as | |
2649 | # C<$hash{warn}>, which has a quite different meaning. Currently | |
2650 | # B::Deparse will always quote strings, even if the string was a | |
2651 | # bareword in the original (i.e. the OPpCONST_BARE flag is ignored | |
2652 | # for constant strings.) So we can cheat slightly here - if we see | |
2653 | # a bareword, we know that it is supposed to be a function call. | |
2654 | # | |
2655 | $idx =~ s/^([A-Za-z_]\w*)$/$1()/; | |
2656 | ||
6e90668e SM |
2657 | return "\$" . $array . $left . $idx . $right; |
2658 | } | |
2659 | ||
3f872cb9 GS |
2660 | sub pp_aelem { maybe_local(@_, elem(@_, "[", "]", "padav")) } |
2661 | sub pp_helem { maybe_local(@_, elem(@_, "{", "}", "padhv")) } | |
6e90668e SM |
2662 | |
2663 | sub pp_gelem { | |
2664 | my $self = shift; | |
9d2c6865 | 2665 | my($op, $cx) = @_; |
6e90668e SM |
2666 | my($glob, $part) = ($op->first, $op->last); |
2667 | $glob = $glob->first; # skip rv2gv | |
3f872cb9 | 2668 | $glob = $glob->first if $glob->name eq "rv2gv"; # this one's a bug |
9d2c6865 SM |
2669 | my $scope = is_scope($glob); |
2670 | $glob = $self->deparse($glob, 0); | |
2671 | $part = $self->deparse($part, 1); | |
6e90668e SM |
2672 | return "*" . ($scope ? "{$glob}" : $glob) . "{$part}"; |
2673 | } | |
2674 | ||
2675 | sub slice { | |
2676 | my $self = shift; | |
9d2c6865 | 2677 | my ($op, $cx, $left, $right, $regname, $padname) = @_; |
6e90668e SM |
2678 | my $last; |
2679 | my(@elems, $kid, $array, $list); | |
2680 | if (class($op) eq "LISTOP") { | |
2681 | $last = $op->last; | |
2682 | } else { # ex-hslice inside delete() | |
2683 | for ($kid = $op->first; !null $kid->sibling; $kid = $kid->sibling) {} | |
2684 | $last = $kid; | |
2685 | } | |
2686 | $array = $last; | |
2687 | $array = $array->first | |
3f872cb9 | 2688 | if $array->name eq $regname or $array->name eq "null"; |
6e90668e | 2689 | if (is_scope($array)) { |
9d2c6865 | 2690 | $array = "{" . $self->deparse($array, 0) . "}"; |
3f872cb9 | 2691 | } elsif ($array->name eq $padname) { |
6e90668e SM |
2692 | $array = $self->padany($array); |
2693 | } else { | |
9d2c6865 | 2694 | $array = $self->deparse($array, 24); |
6e90668e SM |
2695 | } |
2696 | $kid = $op->first->sibling; # skip pushmark | |
3f872cb9 | 2697 | if ($kid->name eq "list") { |
6e90668e SM |
2698 | $kid = $kid->first->sibling; # skip list, pushmark |
2699 | for (; !null $kid; $kid = $kid->sibling) { | |
9d2c6865 | 2700 | push @elems, $self->deparse($kid, 6); |
6e90668e SM |
2701 | } |
2702 | $list = join(", ", @elems); | |
2703 | } else { | |
9d2c6865 | 2704 | $list = $self->deparse($kid, 1); |
6e90668e SM |
2705 | } |
2706 | return "\@" . $array . $left . $list . $right; | |
2707 | } | |
2708 | ||
3ed82cfc GS |
2709 | sub pp_aslice { maybe_local(@_, slice(@_, "[", "]", "rv2av", "padav")) } |
2710 | sub pp_hslice { maybe_local(@_, slice(@_, "{", "}", "rv2hv", "padhv")) } | |
6e90668e SM |
2711 | |
2712 | sub pp_lslice { | |
2713 | my $self = shift; | |
9d2c6865 | 2714 | my($op, $cx) = @_; |
6e90668e SM |
2715 | my $idx = $op->first; |
2716 | my $list = $op->last; | |
2717 | my(@elems, $kid); | |
9d2c6865 SM |
2718 | $list = $self->deparse($list, 1); |
2719 | $idx = $self->deparse($idx, 1); | |
2720 | return "($list)" . "[$idx]"; | |
6e90668e SM |
2721 | } |
2722 | ||
6e90668e SM |
2723 | sub want_scalar { |
2724 | my $op = shift; | |
2725 | return ($op->flags & OPf_WANT) == OPf_WANT_SCALAR; | |
2726 | } | |
2727 | ||
bd0865ec GS |
2728 | sub want_list { |
2729 | my $op = shift; | |
2730 | return ($op->flags & OPf_WANT) == OPf_WANT_LIST; | |
2731 | } | |
2732 | ||
2733 | sub method { | |
6e90668e | 2734 | my $self = shift; |
9d2c6865 | 2735 | my($op, $cx) = @_; |
bd0865ec GS |
2736 | my $kid = $op->first->sibling; # skip pushmark |
2737 | my($meth, $obj, @exprs); | |
3f872cb9 | 2738 | if ($kid->name eq "list" and want_list $kid) { |
bd0865ec GS |
2739 | # When an indirect object isn't a bareword but the args are in |
2740 | # parens, the parens aren't part of the method syntax (the LLAFR | |
2741 | # doesn't apply), but they make a list with OPf_PARENS set that | |
2742 | # doesn't get flattened by the append_elem that adds the method, | |
2743 | # making a (object, arg1, arg2, ...) list where the object | |
2744 | # usually is. This can be distinguished from | |
2745 | # `($obj, $arg1, $arg2)->meth()' (which is legal if $arg2 is an | |
2746 | # object) because in the later the list is in scalar context | |
2747 | # as the left side of -> always is, while in the former | |
2748 | # the list is in list context as method arguments always are. | |
2749 | # (Good thing there aren't method prototypes!) | |
3ed82cfc | 2750 | $meth = $kid->sibling; |
bd0865ec GS |
2751 | $kid = $kid->first->sibling; # skip pushmark |
2752 | $obj = $kid; | |
6e90668e | 2753 | $kid = $kid->sibling; |
bd0865ec | 2754 | for (; not null $kid; $kid = $kid->sibling) { |
9d2c6865 | 2755 | push @exprs, $self->deparse($kid, 6); |
6e90668e | 2756 | } |
bd0865ec GS |
2757 | } else { |
2758 | $obj = $kid; | |
2759 | $kid = $kid->sibling; | |
90c0eb26 RH |
2760 | for (; !null ($kid->sibling) && $kid->name ne "method_named"; |
2761 | $kid = $kid->sibling) { | |
bd0865ec | 2762 | push @exprs, $self->deparse($kid, 6); |
6e90668e | 2763 | } |
3ed82cfc | 2764 | $meth = $kid; |
bd0865ec GS |
2765 | } |
2766 | $obj = $self->deparse($obj, 24); | |
3ed82cfc | 2767 | if ($meth->name eq "method_named") { |
18228111 | 2768 | $meth = $self->const_sv($meth)->PV; |
bd0865ec | 2769 | } else { |
3ed82cfc GS |
2770 | $meth = $meth->first; |
2771 | if ($meth->name eq "const") { | |
2772 | # As of 5.005_58, this case is probably obsoleted by the | |
2773 | # method_named case above | |
18228111 | 2774 | $meth = $self->const_sv($meth)->PV; # needs to be bare |
3ed82cfc GS |
2775 | } else { |
2776 | $meth = $self->deparse($meth, 1); | |
2777 | } | |
bd0865ec GS |
2778 | } |
2779 | my $args = join(", ", @exprs); | |
2780 | $kid = $obj . "->" . $meth; | |
145eb477 | 2781 | if (length $args) { |
bd0865ec GS |
2782 | return $kid . "(" . $args . ")"; # parens mandatory |
2783 | } else { | |
2784 | return $kid; | |
2785 | } | |
2786 | } | |
2787 | ||
2788 | # returns "&" if the prototype doesn't match the args, | |
2789 | # or ("", $args_after_prototype_demunging) if it does. | |
2790 | sub check_proto { | |
2791 | my $self = shift; | |
acaaef34 | 2792 | return "&" if $self->{'noproto'}; |
bd0865ec GS |
2793 | my($proto, @args) = @_; |
2794 | my($arg, $real); | |
2795 | my $doneok = 0; | |
2796 | my @reals; | |
2797 | # An unbackslashed @ or % gobbles up the rest of the args | |
2ae48fff | 2798 | 1 while $proto =~ s/(?<!\\)([@%])[^\]]+$/$1/; |
bd0865ec | 2799 | while ($proto) { |
2ae48fff | 2800 | $proto =~ s/^(\\?[\$\@&%*]|\\\[[\$\@&%*]+\]|;)//; |
bd0865ec GS |
2801 | my $chr = $1; |
2802 | if ($chr eq "") { | |
2803 | return "&" if @args; | |
2804 | } elsif ($chr eq ";") { | |
2805 | $doneok = 1; | |
2806 | } elsif ($chr eq "@" or $chr eq "%") { | |
2807 | push @reals, map($self->deparse($_, 6), @args); | |
2808 | @args = (); | |
6e90668e | 2809 | } else { |
bd0865ec GS |
2810 | $arg = shift @args; |
2811 | last unless $arg; | |
2812 | if ($chr eq "\$") { | |
2813 | if (want_scalar $arg) { | |
2814 | push @reals, $self->deparse($arg, 6); | |
2815 | } else { | |
2816 | return "&"; | |
2817 | } | |
2818 | } elsif ($chr eq "&") { | |
3f872cb9 | 2819 | if ($arg->name =~ /^(s?refgen|undef)$/) { |
bd0865ec GS |
2820 | push @reals, $self->deparse($arg, 6); |
2821 | } else { | |
2822 | return "&"; | |
2823 | } | |
2824 | } elsif ($chr eq "*") { | |
3f872cb9 GS |
2825 | if ($arg->name =~ /^s?refgen$/ |
2826 | and $arg->first->first->name eq "rv2gv") | |
bd0865ec GS |
2827 | { |
2828 | $real = $arg->first->first; # skip refgen, null | |
3f872cb9 | 2829 | if ($real->first->name eq "gv") { |
bd0865ec GS |
2830 | push @reals, $self->deparse($real, 6); |
2831 | } else { | |
2832 | push @reals, $self->deparse($real->first, 6); | |
2833 | } | |
2834 | } else { | |
2835 | return "&"; | |
2836 | } | |
2837 | } elsif (substr($chr, 0, 1) eq "\\") { | |
2ae48fff | 2838 | $chr =~ tr/\\[]//d; |
3f872cb9 | 2839 | if ($arg->name =~ /^s?refgen$/ and |
bd0865ec | 2840 | !null($real = $arg->first) and |
2ae48fff RGS |
2841 | ($chr =~ /\$/ && is_scalar($real->first) |
2842 | or ($chr =~ /@/ | |
2843 | && class($real->first->sibling) ne 'NULL' | |
3f872cb9 GS |
2844 | && $real->first->sibling->name |
2845 | =~ /^(rv2|pad)av$/) | |
2ae48fff RGS |
2846 | or ($chr =~ /%/ |
2847 | && class($real->first->sibling) ne 'NULL' | |
3f872cb9 GS |
2848 | && $real->first->sibling->name |
2849 | =~ /^(rv2|pad)hv$/) | |
2ae48fff | 2850 | #or ($chr =~ /&/ # This doesn't work |
3f872cb9 | 2851 | # && $real->first->name eq "rv2cv") |
2ae48fff | 2852 | or ($chr =~ /\*/ |
3f872cb9 | 2853 | && $real->first->name eq "rv2gv"))) |
bd0865ec GS |
2854 | { |
2855 | push @reals, $self->deparse($real, 6); | |
2856 | } else { | |
2857 | return "&"; | |
2858 | } | |
2859 | } | |
2860 | } | |
9d2c6865 | 2861 | } |
bd0865ec GS |
2862 | return "&" if $proto and !$doneok; # too few args and no `;' |
2863 | return "&" if @args; # too many args | |
2864 | return ("", join ", ", @reals); | |
2865 | } | |
2866 | ||
2867 | sub pp_entersub { | |
2868 | my $self = shift; | |
2869 | my($op, $cx) = @_; | |
2870 | return $self->method($op, $cx) unless null $op->first->sibling; | |
2871 | my $prefix = ""; | |
2872 | my $amper = ""; | |
2873 | my($kid, @exprs); | |
90c0eb26 | 2874 | if ($op->flags & OPf_SPECIAL && !($op->flags & OPf_MOD)) { |
9d2c6865 SM |
2875 | $prefix = "do "; |
2876 | } elsif ($op->private & OPpENTERSUB_AMPER) { | |
2877 | $amper = "&"; | |
2878 | } | |
2879 | $kid = $op->first; | |
2880 | $kid = $kid->first->sibling; # skip ex-list, pushmark | |
2881 | for (; not null $kid->sibling; $kid = $kid->sibling) { | |
2882 | push @exprs, $kid; | |
2883 | } | |
bd0865ec GS |
2884 | my $simple = 0; |
2885 | my $proto = undef; | |
9d2c6865 SM |
2886 | if (is_scope($kid)) { |
2887 | $amper = "&"; | |
2888 | $kid = "{" . $self->deparse($kid, 0) . "}"; | |
3f872cb9 | 2889 | } elsif ($kid->first->name eq "gv") { |
6f611a1a | 2890 | my $gv = $self->gv_or_padgv($kid->first); |
9d2c6865 SM |
2891 | if (class($gv->CV) ne "SPECIAL") { |
2892 | $proto = $gv->CV->PV if $gv->CV->FLAGS & SVf_POK; | |
2893 | } | |
bd0865ec | 2894 | $simple = 1; # only calls of named functions can be prototyped |
9d2c6865 | 2895 | $kid = $self->deparse($kid, 24); |
90c0eb26 | 2896 | } elsif (is_scalar ($kid->first) && $kid->first->name ne 'rv2cv') { |
9d2c6865 SM |
2897 | $amper = "&"; |
2898 | $kid = $self->deparse($kid, 24); | |
2899 | } else { | |
2900 | $prefix = ""; | |
3ed82cfc GS |
2901 | my $arrow = is_subscriptable($kid->first) ? "" : "->"; |
2902 | $kid = $self->deparse($kid, 24) . $arrow; | |
9d2c6865 | 2903 | } |
0ca62a8e RH |
2904 | |
2905 | # Doesn't matter how many prototypes there are, if | |
2906 | # they haven't happened yet! | |
1d38190f RGS |
2907 | my $declared; |
2908 | { | |
2909 | no strict 'refs'; | |
2910 | no warnings 'uninitialized'; | |
2911 | $declared = exists $self->{'subs_declared'}{$kid} | |
2912 | || ( | |
2913 | defined &{ %{$self->{'curstash'}."::"}->{$kid} } | |
2914 | && !exists | |
2915 | $self->{'subs_deparsed'}{$self->{'curstash'}."::".$kid} | |
2916 | && defined prototype $self->{'curstash'}."::".$kid | |
2917 | ); | |
2918 | if (!$declared && defined($proto)) { | |
2919 | # Avoid "too early to check prototype" warning | |
2920 | ($amper, $proto) = ('&'); | |
2921 | } | |
e99ebc55 | 2922 | } |
0ca62a8e | 2923 | |
bd0865ec | 2924 | my $args; |
0ca62a8e | 2925 | if ($declared and defined $proto and not $amper) { |
bd0865ec GS |
2926 | ($amper, $args) = $self->check_proto($proto, @exprs); |
2927 | if ($amper eq "&") { | |
9d2c6865 SM |
2928 | $args = join(", ", map($self->deparse($_, 6), @exprs)); |
2929 | } | |
2930 | } else { | |
2931 | $args = join(", ", map($self->deparse($_, 6), @exprs)); | |
6e90668e | 2932 | } |
9d2c6865 SM |
2933 | if ($prefix or $amper) { |
2934 | if ($op->flags & OPf_STACKED) { | |
2935 | return $prefix . $amper . $kid . "(" . $args . ")"; | |
2936 | } else { | |
2937 | return $prefix . $amper. $kid; | |
2938 | } | |
6e90668e | 2939 | } else { |
34a48b4b | 2940 | # glob() invocations can be translated into calls of |
d1be9408 | 2941 | # CORE::GLOBAL::glob with a second parameter, a number. |
34a48b4b RH |
2942 | # Reverse this. |
2943 | if ($kid eq "CORE::GLOBAL::glob") { | |
2944 | $kid = "glob"; | |
2945 | $args =~ s/\s*,[^,]+$//; | |
2946 | } | |
2947 | ||
2948 | # It's a syntax error to call CORE::GLOBAL::foo without a prefix, | |
2949 | # so it must have been translated from a keyword call. Translate | |
2950 | # it back. | |
2951 | $kid =~ s/^CORE::GLOBAL:://; | |
2952 | ||
0ca62a8e RH |
2953 | if (!$declared) { |
2954 | return "$kid(" . $args . ")"; | |
2955 | } elsif (defined $proto and $proto eq "") { | |
9d2c6865 | 2956 | return $kid; |
ce4e655d | 2957 | } elsif (defined $proto and $proto eq "\$" and is_scalar($exprs[0])) { |
9d2c6865 | 2958 | return $self->maybe_parens_func($kid, $args, $cx, 16); |
6f611a1a | 2959 | } elsif (defined($proto) && $proto or $simple) { |
9d2c6865 SM |
2960 | return $self->maybe_parens_func($kid, $args, $cx, 5); |
2961 | } else { | |
2962 | return "$kid(" . $args . ")"; | |
2963 | } | |
6e90668e SM |
2964 | } |
2965 | } | |
2966 | ||
2967 | sub pp_enterwrite { unop(@_, "write") } | |
2968 | ||
2969 | # escape things that cause interpolation in double quotes, | |
2970 | # but not character escapes | |
2971 | sub uninterp { | |
2972 | my($str) = @_; | |
3f766ba3 | 2973 | $str =~ s/(^|\G|[^\\])((?:\\\\)*)([\$\@]|\\[uUlLQE])/$1$2\\$3/g; |
9d2c6865 SM |
2974 | return $str; |
2975 | } | |
2976 | ||
b7dad2dc RH |
2977 | { |
2978 | my $bal; | |
2979 | BEGIN { | |
cdf8218f RH |
2980 | use re "eval"; |
2981 | # Matches any string which is balanced with respect to {braces} | |
b7dad2dc | 2982 | $bal = qr( |
cdf8218f RH |
2983 | (?: |
2984 | [^\\{}] | |
2985 | | \\\\ | |
2986 | | \\[{}] | |
2987 | | \{(??{$bal})\} | |
2988 | )* | |
2989 | )x; | |
b7dad2dc RH |
2990 | } |
2991 | ||
2992 | # the same, but treat $|, $), $( and $ at the end of the string differently | |
2993 | sub re_uninterp { | |
2994 | my($str) = @_; | |
cdf8218f RH |
2995 | |
2996 | $str =~ s/ | |
2997 | ( ^|\G # $1 | |
2998 | | [^\\] | |
2999 | ) | |
3000 | ||
3001 | ( # $2 | |
3002 | (?:\\\\)* | |
3003 | ) | |
3004 | ||
3005 | ( # $3 | |
3006 | (\(\?\??\{$bal\}\)) # $4 | |
3007 | | [\$\@] | |
3008 | (?!\||\)|\(|$) | |
3009 | | \\[uUlLQE] | |
3010 | ) | |
3011 | ||
3012 | /length($4) ? "$1$2$4" : "$1$2\\$3"/xeg; | |
3013 | ||
6e90668e SM |
3014 | return $str; |
3015 | } | |
3016 | ||
b7dad2dc RH |
3017 | # This is for regular expressions with the /x modifier |
3018 | # We have to leave comments unmangled. | |
a9760014 | 3019 | sub re_uninterp_extended { |
b7dad2dc RH |
3020 | my($str) = @_; |
3021 | ||
3022 | $str =~ s/ | |
3023 | ( ^|\G # $1 | |
3024 | | [^\\] | |
3025 | ) | |
3026 | ||
3027 | ( # $2 | |
3028 | (?:\\\\)* | |
3029 | ) | |
3030 | ||
3031 | ( # $3 | |
3032 | ( \(\?\??\{$bal\}\) # $4 (skip over (?{}) and (??{}) blocks) | |
3033 | | \#[^\n]* # (skip over comments) | |
3034 | ) | |
3035 | | [\$\@] | |
9a58b761 | 3036 | (?!\||\)|\(|$|\s) |
b7dad2dc RH |
3037 | | \\[uUlLQE] |
3038 | ) | |
3039 | ||
3040 | /length($4) ? "$1$2$4" : "$1$2\\$3"/xeg; | |
3041 | ||
a9760014 RH |
3042 | return $str; |
3043 | } | |
b7dad2dc | 3044 | } |
a9760014 | 3045 | |
57aa3c4e JH |
3046 | my %unctrl = # portable to to EBCDIC |
3047 | ( | |
3048 | "\c@" => '\c@', # unused | |
3049 | "\cA" => '\cA', | |
3050 | "\cB" => '\cB', | |
3051 | "\cC" => '\cC', | |
3052 | "\cD" => '\cD', | |
3053 | "\cE" => '\cE', | |
3054 | "\cF" => '\cF', | |
3055 | "\cG" => '\cG', | |
3056 | "\cH" => '\cH', | |
3057 | "\cI" => '\cI', | |
3058 | "\cJ" => '\cJ', | |
3059 | "\cK" => '\cK', | |
3060 | "\cL" => '\cL', | |
3061 | "\cM" => '\cM', | |
3062 | "\cN" => '\cN', | |
3063 | "\cO" => '\cO', | |
3064 | "\cP" => '\cP', | |
3065 | "\cQ" => '\cQ', | |
3066 | "\cR" => '\cR', | |
3067 | "\cS" => '\cS', | |
3068 | "\cT" => '\cT', | |
3069 | "\cU" => '\cU', | |
3070 | "\cV" => '\cV', | |
3071 | "\cW" => '\cW', | |
3072 | "\cX" => '\cX', | |
3073 | "\cY" => '\cY', | |
3074 | "\cZ" => '\cZ', | |
3075 | "\c[" => '\c[', # unused | |
3076 | "\c\\" => '\c\\', # unused | |
3077 | "\c]" => '\c]', # unused | |
3078 | "\c_" => '\c_', # unused | |
3079 | ); | |
3080 | ||
6e90668e | 3081 | # character escapes, but not delimiters that might need to be escaped |
746698c5 | 3082 | sub escape_str { # ASCII, UTF8 |
6e90668e | 3083 | my($str) = @_; |
cef22867 | 3084 | $str =~ s/(.)/ord($1) > 255 ? sprintf("\\x{%x}", ord($1)) : $1/eg; |
6e90668e | 3085 | $str =~ s/\a/\\a/g; |
9200a1b0 | 3086 | # $str =~ s/\cH/\\b/g; # \b means something different in a regex |
6e90668e SM |
3087 | $str =~ s/\t/\\t/g; |
3088 | $str =~ s/\n/\\n/g; | |
3089 | $str =~ s/\e/\\e/g; | |
3090 | $str =~ s/\f/\\f/g; | |
3091 | $str =~ s/\r/\\r/g; | |
fc132725 | 3092 | $str =~ s/([\cA-\cZ])/$unctrl{$1}/ge; |
cef22867 | 3093 | $str =~ s/([[:^print:]])/sprintf("\\%03o", ord($1))/ge; |
6e90668e SM |
3094 | return $str; |
3095 | } | |
3096 | ||
b7dad2dc RH |
3097 | # For regexes with the /x modifier. |
3098 | # Leave whitespace unmangled. | |
a9760014 RH |
3099 | sub escape_extended_re { |
3100 | my($str) = @_; | |
cef22867 | 3101 | $str =~ s/(.)/ord($1) > 255 ? sprintf("\\x{%x}", ord($1)) : $1/eg; |
aee8fd8d RGS |
3102 | $str =~ s/([[:^print:]])/ |
3103 | ($1 =~ y! \t\n!!) ? $1 : sprintf("\\%03o", ord($1))/ge; | |
a9760014 RH |
3104 | $str =~ s/\n/\n\f/g; |
3105 | return $str; | |
3106 | } | |
3107 | ||
9d2c6865 SM |
3108 | # Don't do this for regexen |
3109 | sub unback { | |
3110 | my($str) = @_; | |
3111 | $str =~ s/\\/\\\\/g; | |
3112 | return $str; | |
3113 | } | |
3114 | ||
08c6f5ec RH |
3115 | # Remove backslashes which precede literal control characters, |
3116 | # to avoid creating ambiguity when we escape the latter. | |
3117 | sub re_unback { | |
3118 | my($str) = @_; | |
3119 | ||
3120 | # the insane complexity here is due to the behaviour of "\c\" | |
cef22867 | 3121 | $str =~ s/(^|[^\\]|\\c\\)(?<!\\c)\\(\\\\)*(?=[[:^print:]])/$1$2/g; |
08c6f5ec RH |
3122 | return $str; |
3123 | } | |
3124 | ||
6e90668e SM |
3125 | sub balanced_delim { |
3126 | my($str) = @_; | |
3127 | my @str = split //, $str; | |
3128 | my($ar, $open, $close, $fail, $c, $cnt); | |
3129 | for $ar (['[',']'], ['(',')'], ['<','>'], ['{','}']) { | |
3130 | ($open, $close) = @$ar; | |
3131 | $fail = 0; $cnt = 0; | |
3132 | for $c (@str) { | |
3133 | if ($c eq $open) { | |
3134 | $cnt++; | |
3135 | } elsif ($c eq $close) { | |
3136 | $cnt--; | |
3137 | if ($cnt < 0) { | |
bd0865ec | 3138 | # qq()() isn't ")(" |
6e90668e SM |
3139 | $fail = 1; |
3140 | last; | |
3141 | } | |
3142 | } | |
3143 | } | |
3144 | $fail = 1 if $cnt != 0; | |
3145 | return ($open, "$open$str$close") if not $fail; | |
3146 | } | |
3147 | return ("", $str); | |
3148 | } | |
3149 | ||
3150 | sub single_delim { | |
3151 | my($q, $default, $str) = @_; | |
90be192f | 3152 | return "$default$str$default" if $default and index($str, $default) == -1; |
8347ad86 RGS |
3153 | if ($q ne 'qr') { |
3154 | (my $succeed, $str) = balanced_delim($str); | |
3155 | return "$q$str" if $succeed; | |
3156 | } | |
3157 | for my $delim ('/', '"', '#') { | |
6e90668e SM |
3158 | return "$q$delim" . $str . $delim if index($str, $delim) == -1; |
3159 | } | |
90be192f SM |
3160 | if ($default) { |
3161 | $str =~ s/$default/\\$default/g; | |
3162 | return "$default$str$default"; | |
3163 | } else { | |
3164 | $str =~ s[/][\\/]g; | |
3165 | return "$q/$str/"; | |
3166 | } | |
6e90668e SM |
3167 | } |
3168 | ||
6e90668e SM |
3169 | sub const { |
3170 | my $sv = shift; | |
3171 | if (class($sv) eq "SPECIAL") { | |
bd0865ec | 3172 | return ('undef', '1', '0')[$$sv-1]; # sv_undef, sv_yes, sv_no |
7a9b44b9 RH |
3173 | } elsif (class($sv) eq "NULL") { |
3174 | return 'undef'; | |
6e90668e | 3175 | } elsif ($sv->FLAGS & SVf_IOK) { |
d9963e60 | 3176 | return $sv->int_value; |
6e90668e | 3177 | } elsif ($sv->FLAGS & SVf_NOK) { |
fecea806 RH |
3178 | # try the default stringification |
3179 | my $r = "".$sv->NV; | |
3180 | if ($r =~ /e/) { | |
3181 | # If it's in scientific notation, we might have lost information | |
3182 | return sprintf("%.20e", $sv->NV); | |
3183 | } | |
3184 | return $r; | |
7a9b44b9 | 3185 | } elsif ($sv->FLAGS & SVf_ROK && $sv->can("RV")) { |
6e90668e | 3186 | return "\\(" . const($sv->RV) . ")"; # constant folded |
34768ba5 | 3187 | } elsif ($sv->FLAGS & SVf_POK) { |
6e90668e | 3188 | my $str = $sv->PV; |
bd0865ec | 3189 | if ($str =~ /[^ -~]/) { # ASCII for non-printing |
9d2c6865 | 3190 | return single_delim("qq", '"', uninterp escape_str unback $str); |
6e90668e | 3191 | } else { |
bd0865ec | 3192 | return single_delim("q", "'", unback $str); |
6e90668e | 3193 | } |
34768ba5 RH |
3194 | } else { |
3195 | return "undef"; | |
a798dbf2 MB |
3196 | } |
3197 | } | |
3198 | ||
18228111 GS |
3199 | sub const_sv { |
3200 | my $self = shift; | |
3201 | my $op = shift; | |
3202 | my $sv = $op->sv; | |
3203 | # the constant could be in the pad (under useithreads) | |
3204 | $sv = $self->padval($op->targ) unless $$sv; | |
3205 | return $sv; | |
3206 | } | |
3207 | ||
6e90668e SM |
3208 | sub pp_const { |
3209 | my $self = shift; | |
9d2c6865 | 3210 | my($op, $cx) = @_; |
7e40138b RH |
3211 | if ($op->private & OPpCONST_ARYBASE) { |
3212 | return '$['; | |
3213 | } | |
4c1f658f | 3214 | # if ($op->private & OPpCONST_BARE) { # trouble with `=>' autoquoting |
18228111 | 3215 | # return $self->const_sv($op)->PV; |
6e90668e | 3216 | # } |
18228111 | 3217 | my $sv = $self->const_sv($op); |
d5ae42cc JM |
3218 | # return const($sv); |
3219 | my $c = const $sv; | |
76ef7183 | 3220 | return $c =~ /^-\d/ ? $self->maybe_parens($c, $cx, 21) : $c; |
6e90668e SM |
3221 | } |
3222 | ||
3223 | sub dq { | |
3224 | my $self = shift; | |
3225 | my $op = shift; | |
3f872cb9 GS |
3226 | my $type = $op->name; |
3227 | if ($type eq "const") { | |
f3402b25 RH |
3228 | return '$[' if $op->private & OPpCONST_ARYBASE; |
3229 | return uninterp(escape_str(unback($self->const_sv($op)->as_string))); | |
3f872cb9 | 3230 | } elsif ($type eq "concat") { |
8fed1104 RH |
3231 | my $first = $self->dq($op->first); |
3232 | my $last = $self->dq($op->last); | |
44c6d2a1 | 3233 | |
b7dad2dc | 3234 | # Disambiguate "${foo}bar", "${foo}{bar}", "${foo}[1]" |
44c6d2a1 RH |
3235 | ($last =~ /^[A-Z\\\^\[\]_?]/ && |
3236 | $first =~ s/([\$@])\^$/${1}{^}/) # "${^}W" etc | |
3237 | || ($last =~ /^[{\[\w_]/ && | |
3238 | $first =~ s/([\$@])([A-Za-z_]\w*)$/${1}{$2}/); | |
3239 | ||
8fed1104 | 3240 | return $first . $last; |
3f872cb9 | 3241 | } elsif ($type eq "uc") { |
6e90668e | 3242 | return '\U' . $self->dq($op->first->sibling) . '\E'; |
3f872cb9 | 3243 | } elsif ($type eq "lc") { |
6e90668e | 3244 | return '\L' . $self->dq($op->first->sibling) . '\E'; |
3f872cb9 | 3245 | } elsif ($type eq "ucfirst") { |
6e90668e | 3246 | return '\u' . $self->dq($op->first->sibling); |
3f872cb9 | 3247 | } elsif ($type eq "lcfirst") { |
6e90668e | 3248 | return '\l' . $self->dq($op->first->sibling); |
3f872cb9 | 3249 | } elsif ($type eq "quotemeta") { |
6e90668e | 3250 | return '\Q' . $self->dq($op->first->sibling) . '\E'; |
3f872cb9 | 3251 | } elsif ($type eq "join") { |
9d2c6865 | 3252 | return $self->deparse($op->last, 26); # was join($", @ary) |
a798dbf2 | 3253 | } else { |
9d2c6865 | 3254 | return $self->deparse($op, 26); |
6e90668e SM |
3255 | } |
3256 | } | |
3257 | ||
3258 | sub pp_backtick { | |
3259 | my $self = shift; | |
9d2c6865 | 3260 | my($op, $cx) = @_; |
6e90668e SM |
3261 | # skip pushmark |
3262 | return single_delim("qx", '`', $self->dq($op->first->sibling)); | |
3263 | } | |
3264 | ||
3265 | sub dquote { | |
3266 | my $self = shift; | |
6f611a1a | 3267 | my($op, $cx) = @_; |
3ed82cfc GS |
3268 | my $kid = $op->first->sibling; # skip ex-stringify, pushmark |
3269 | return $self->deparse($kid, $cx) if $self->{'unquote'}; | |
3270 | $self->maybe_targmy($kid, $cx, | |
3271 | sub {single_delim("qq", '"', $self->dq($_[1]))}); | |
6e90668e SM |
3272 | } |
3273 | ||
bd0865ec | 3274 | # OP_STRINGIFY is a listop, but it only ever has one arg |
3ed82cfc | 3275 | sub pp_stringify { maybe_targmy(@_, \&dquote) } |
6e90668e SM |
3276 | |
3277 | # tr/// and s/// (and tr[][], tr[]//, tr###, etc) | |
3278 | # note that tr(from)/to/ is OK, but not tr/from/(to) | |
3279 | sub double_delim { | |
3280 | my($from, $to) = @_; | |
3281 | my($succeed, $delim); | |
3282 | if ($from !~ m[/] and $to !~ m[/]) { | |
3283 | return "/$from/$to/"; | |
3284 | } elsif (($succeed, $from) = balanced_delim($from) and $succeed) { | |
3285 | if (($succeed, $to) = balanced_delim($to) and $succeed) { | |
3286 | return "$from$to"; | |
3287 | } else { | |
3288 | for $delim ('/', '"', '#') { # note no `'' -- s''' is special | |
3289 | return "$from$delim$to$delim" if index($to, $delim) == -1; | |
3290 | } | |
3291 | $to =~ s[/][\\/]g; | |
3292 | return "$from/$to/"; | |
3293 | } | |
3294 | } else { | |
3295 | for $delim ('/', '"', '#') { # note no ' | |
3296 | return "$delim$from$delim$to$delim" | |
3297 | if index($to . $from, $delim) == -1; | |
3298 | } | |
3299 | $from =~ s[/][\\/]g; | |
3300 | $to =~ s[/][\\/]g; | |
3301 | return "/$from/$to/"; | |
3302 | } | |
3303 | } | |
3304 | ||
2a9e2f8a | 3305 | # Only used by tr///, so backslashes hyphens |
6e90668e SM |
3306 | sub pchr { # ASCII |
3307 | my($n) = @_; | |
3308 | if ($n == ord '\\') { | |
3309 | return '\\\\'; | |
2a9e2f8a RH |
3310 | } elsif ($n == ord "-") { |
3311 | return "\\-"; | |
6e90668e SM |
3312 | } elsif ($n >= ord(' ') and $n <= ord('~')) { |
3313 | return chr($n); | |
3314 | } elsif ($n == ord "\a") { | |
3315 | return '\\a'; | |
3316 | } elsif ($n == ord "\b") { | |
3317 | return '\\b'; | |
3318 | } elsif ($n == ord "\t") { | |
3319 | return '\\t'; | |
3320 | } elsif ($n == ord "\n") { | |
3321 | return '\\n'; | |
3322 | } elsif ($n == ord "\e") { | |
3323 | return '\\e'; | |
3324 | } elsif ($n == ord "\f") { | |
3325 | return '\\f'; | |
3326 | } elsif ($n == ord "\r") { | |
3327 | return '\\r'; | |
3328 | } elsif ($n >= ord("\cA") and $n <= ord("\cZ")) { | |
3329 | return '\\c' . chr(ord("@") + $n); | |
3330 | } else { | |
3331 | # return '\x' . sprintf("%02x", $n); | |
3332 | return '\\' . sprintf("%03o", $n); | |
3333 | } | |
3334 | } | |
3335 | ||
3336 | sub collapse { | |
3337 | my(@chars) = @_; | |
23db111c | 3338 | my($str, $c, $tr) = (""); |
6e90668e SM |
3339 | for ($c = 0; $c < @chars; $c++) { |
3340 | $tr = $chars[$c]; | |
3341 | $str .= pchr($tr); | |
3342 | if ($c <= $#chars - 2 and $chars[$c + 1] == $tr + 1 and | |
3343 | $chars[$c + 2] == $tr + 2) | |
3344 | { | |
f4a44678 SM |
3345 | for (; $c <= $#chars-1 and $chars[$c + 1] == $chars[$c] + 1; $c++) |
3346 | {} | |
6e90668e SM |
3347 | $str .= "-"; |
3348 | $str .= pchr($chars[$c]); | |
3349 | } | |
3350 | } | |
3351 | return $str; | |
3352 | } | |
3353 | ||
f4a44678 SM |
3354 | sub tr_decode_byte { |
3355 | my($table, $flags) = @_; | |
2a9e2f8a | 3356 | my(@table) = unpack("s*", $table); |
bec89253 | 3357 | splice @table, 0x100, 1; # Number of subsequent elements |
6e90668e SM |
3358 | my($c, $tr, @from, @to, @delfrom, $delhyphen); |
3359 | if ($table[ord "-"] != -1 and | |
3360 | $table[ord("-") - 1] == -1 || $table[ord("-") + 1] == -1) | |
3361 | { | |
3362 | $tr = $table[ord "-"]; | |
3363 | $table[ord "-"] = -1; | |
3364 | if ($tr >= 0) { | |
3365 | @from = ord("-"); | |
3366 | @to = $tr; | |
3367 | } else { # -2 ==> delete | |
3368 | $delhyphen = 1; | |
3369 | } | |
3370 | } | |
2a9e2f8a | 3371 | for ($c = 0; $c < @table; $c++) { |
6e90668e SM |
3372 | $tr = $table[$c]; |
3373 | if ($tr >= 0) { | |
3374 | push @from, $c; push @to, $tr; | |
3375 | } elsif ($tr == -2) { | |
3376 | push @delfrom, $c; | |
3377 | } | |
3378 | } | |
6e90668e | 3379 | @from = (@from, @delfrom); |
f4a44678 | 3380 | if ($flags & OPpTRANS_COMPLEMENT) { |
6e90668e SM |
3381 | my @newfrom = (); |
3382 | my %from; | |
3383 | @from{@from} = (1) x @from; | |
3384 | for ($c = 0; $c < 256; $c++) { | |
3385 | push @newfrom, $c unless $from{$c}; | |
3386 | } | |
3387 | @from = @newfrom; | |
3388 | } | |
56d8b52c | 3389 | unless ($flags & OPpTRANS_DELETE || !@to) { |
6e90668e SM |
3390 | pop @to while $#to and $to[$#to] == $to[$#to -1]; |
3391 | } | |
6e90668e SM |
3392 | my($from, $to); |
3393 | $from = collapse(@from); | |
3394 | $to = collapse(@to); | |
3395 | $from .= "-" if $delhyphen; | |
f4a44678 SM |
3396 | return ($from, $to); |
3397 | } | |
3398 | ||
3399 | sub tr_chr { | |
3400 | my $x = shift; | |
3401 | if ($x == ord "-") { | |
3402 | return "\\-"; | |
2a9e2f8a RH |
3403 | } elsif ($x == ord "\\") { |
3404 | return "\\\\"; | |
f4a44678 SM |
3405 | } else { |
3406 | return chr $x; | |
3407 | } | |
3408 | } | |
3409 | ||
3410 | # XXX This doesn't yet handle all cases correctly either | |
3411 | ||
3412 | sub tr_decode_utf8 { | |
3413 | my($swash_hv, $flags) = @_; | |
3414 | my %swash = $swash_hv->ARRAY; | |
3415 | my $final = undef; | |
3416 | $final = $swash{'FINAL'}->IV if exists $swash{'FINAL'}; | |
3417 | my $none = $swash{"NONE"}->IV; | |
3418 | my $extra = $none + 1; | |
3419 | my(@from, @delfrom, @to); | |
3420 | my $line; | |
3421 | foreach $line (split /\n/, $swash{'LIST'}->PV) { | |
3422 | my($min, $max, $result) = split(/\t/, $line); | |
3423 | $min = hex $min; | |
3424 | if (length $max) { | |
3425 | $max = hex $max; | |
3426 | } else { | |
3427 | $max = $min; | |
3428 | } | |
3429 | $result = hex $result; | |
3430 | if ($result == $extra) { | |
3431 | push @delfrom, [$min, $max]; | |
3432 | } else { | |
3433 | push @from, [$min, $max]; | |
3434 | push @to, [$result, $result + $max - $min]; | |
3435 | } | |
3436 | } | |
3437 | for my $i (0 .. $#from) { | |
3438 | if ($from[$i][0] == ord '-') { | |
3439 | unshift @from, splice(@from, $i, 1); | |
3440 | unshift @to, splice(@to, $i, 1); | |
3441 | last; | |
3442 | } elsif ($from[$i][1] == ord '-') { | |
3443 | $from[$i][1]--; | |
3444 | $to[$i][1]--; | |
3445 | unshift @from, ord '-'; | |
3446 | unshift @to, ord '-'; | |
3447 | last; | |
3448 | } | |
3449 | } | |
3450 | for my $i (0 .. $#delfrom) { | |
3451 | if ($delfrom[$i][0] == ord '-') { | |
3452 | push @delfrom, splice(@delfrom, $i, 1); | |
3453 | last; | |
3454 | } elsif ($delfrom[$i][1] == ord '-') { | |
3455 | $delfrom[$i][1]--; | |
3456 | push @delfrom, ord '-'; | |
3457 | last; | |
3458 | } | |
3459 | } | |
3460 | if (defined $final and $to[$#to][1] != $final) { | |
3461 | push @to, [$final, $final]; | |
3462 | } | |
3463 | push @from, @delfrom; | |
3464 | if ($flags & OPpTRANS_COMPLEMENT) { | |
3465 | my @newfrom; | |
3466 | my $next = 0; | |
3467 | for my $i (0 .. $#from) { | |
3468 | push @newfrom, [$next, $from[$i][0] - 1]; | |
3469 | $next = $from[$i][1] + 1; | |
3470 | } | |
3471 | @from = (); | |
3472 | for my $range (@newfrom) { | |
3473 | if ($range->[0] <= $range->[1]) { | |
3474 | push @from, $range; | |
3475 | } | |
3476 | } | |
3477 | } | |
3478 | my($from, $to, $diff); | |
3479 | for my $chunk (@from) { | |
3480 | $diff = $chunk->[1] - $chunk->[0]; | |
3481 | if ($diff > 1) { | |
3482 | $from .= tr_chr($chunk->[0]) . "-" . tr_chr($chunk->[1]); | |
3483 | } elsif ($diff == 1) { | |
3484 | $from .= tr_chr($chunk->[0]) . tr_chr($chunk->[1]); | |
3485 | } else { | |
3486 | $from .= tr_chr($chunk->[0]); | |
3487 | } | |
3488 | } | |
3489 | for my $chunk (@to) { | |
3490 | $diff = $chunk->[1] - $chunk->[0]; | |
3491 | if ($diff > 1) { | |
3492 | $to .= tr_chr($chunk->[0]) . "-" . tr_chr($chunk->[1]); | |
3493 | } elsif ($diff == 1) { | |
3494 | $to .= tr_chr($chunk->[0]) . tr_chr($chunk->[1]); | |
3495 | } else { | |
3496 | $to .= tr_chr($chunk->[0]); | |
3497 | } | |
3498 | } | |
3499 | #$final = sprintf("%04x", $final) if defined $final; | |
3500 | #$none = sprintf("%04x", $none) if defined $none; | |
3501 | #$extra = sprintf("%04x", $extra) if defined $extra; | |
3502 | #print STDERR "final: $final\n none: $none\nextra: $extra\n"; | |
3503 | #print STDERR $swash{'LIST'}->PV; | |
3504 | return (escape_str($from), escape_str($to)); | |
3505 | } | |
3506 | ||
3507 | sub pp_trans { | |
3508 | my $self = shift; | |
3509 | my($op, $cx) = @_; | |
3510 | my($from, $to); | |
3511 | if (class($op) eq "PVOP") { | |
3512 | ($from, $to) = tr_decode_byte($op->pv, $op->private); | |
3513 | } else { # class($op) eq "SVOP" | |
3514 | ($from, $to) = tr_decode_utf8($op->sv->RV, $op->private); | |
3515 | } | |
3516 | my $flags = ""; | |
3517 | $flags .= "c" if $op->private & OPpTRANS_COMPLEMENT; | |
3518 | $flags .= "d" if $op->private & OPpTRANS_DELETE; | |
3519 | $to = "" if $from eq $to and $flags eq ""; | |
3520 | $flags .= "s" if $op->private & OPpTRANS_SQUASH; | |
6e90668e SM |
3521 | return "tr" . double_delim($from, $to) . $flags; |
3522 | } | |
3523 | ||
3524 | # Like dq(), but different | |
3525 | sub re_dq { | |
3526 | my $self = shift; | |
a9760014 RH |
3527 | my ($op, $extended) = @_; |
3528 | ||
3f872cb9 GS |
3529 | my $type = $op->name; |
3530 | if ($type eq "const") { | |
f3402b25 | 3531 | return '$[' if $op->private & OPpCONST_ARYBASE; |
a9760014 RH |
3532 | my $unbacked = re_unback($self->const_sv($op)->as_string); |
3533 | return re_uninterp_extended(escape_extended_re($unbacked)) | |
3534 | if $extended; | |
3535 | return re_uninterp(escape_str($unbacked)); | |
3f872cb9 | 3536 | } elsif ($type eq "concat") { |
a9760014 RH |
3537 | my $first = $self->re_dq($op->first, $extended); |
3538 | my $last = $self->re_dq($op->last, $extended); | |
b73b7152 | 3539 | |
a0e66df8 | 3540 | # Disambiguate "${foo}bar", "${foo}{bar}", "${foo}[1]" |
b73b7152 JH |
3541 | ($last =~ /^[A-Z\\\^\[\]_?]/ && |
3542 | $first =~ s/([\$@])\^$/${1}{^}/) # "${^}W" etc | |
3543 | || ($last =~ /^[{\[\w_]/ && | |
3544 | $first =~ s/([\$@])([A-Za-z_]\w*)$/${1}{$2}/); | |
3545 | ||
a0e66df8 | 3546 | return $first . $last; |
3f872cb9 | 3547 | } elsif ($type eq "uc") { |
a9760014 | 3548 | return '\U' . $self->re_dq($op->first->sibling, $extended) . '\E'; |
3f872cb9 | 3549 | } elsif ($type eq "lc") { |
a9760014 | 3550 | return '\L' . $self->re_dq($op->first->sibling, $extended) . '\E'; |
3f872cb9 | 3551 | } elsif ($type eq "ucfirst") { |
a9760014 | 3552 | return '\u' . $self->re_dq($op->first->sibling, $extended); |
3f872cb9 | 3553 | } elsif ($type eq "lcfirst") { |
a9760014 | 3554 | return '\l' . $self->re_dq($op->first->sibling, $extended); |
3f872cb9 | 3555 | } elsif ($type eq "quotemeta") { |
a9760014 | 3556 | return '\Q' . $self->re_dq($op->first->sibling, $extended) . '\E'; |
3f872cb9 | 3557 | } elsif ($type eq "join") { |
9d2c6865 | 3558 | return $self->deparse($op->last, 26); # was join($", @ary) |
6e90668e | 3559 | } else { |
9d2c6865 | 3560 | return $self->deparse($op, 26); |
6e90668e SM |
3561 | } |
3562 | } | |
3563 | ||
a9760014 RH |
3564 | sub pure_string { |
3565 | my ($self, $op) = @_; | |
3566 | my $type = $op->name; | |
3567 | ||
3568 | if ($type eq 'const') { | |
3569 | return 1; | |
3570 | } | |
3571 | elsif ($type =~ /^[ul]c(first)?$/ || $type eq 'quotemeta') { | |
3572 | return $self->pure_string($op->first->sibling); | |
3573 | } | |
3574 | elsif ($type eq 'join') { | |
3575 | my $join_op = $op->first->sibling; # Skip pushmark | |
3576 | return 0 unless $join_op->name eq 'null' && $join_op->targ eq OP_RV2SV; | |
3577 | ||
3578 | my $gvop = $join_op->first; | |
3579 | return 0 unless $gvop->name eq 'gvsv'; | |
3580 | return 0 unless '"' eq $self->gv_name($self->gv_or_padgv($gvop)); | |
3581 | ||
3582 | return 0 unless ${$join_op->sibling} eq ${$op->last}; | |
3583 | return 0 unless $op->last->name =~ /^(rv2|pad)av$/; | |
3584 | } | |
3585 | elsif ($type eq 'concat') { | |
3586 | return $self->pure_string($op->first) | |
3587 | && $self->pure_string($op->last); | |
3588 | } | |
3589 | elsif (is_scalar($op) || $type =~ /^[ah]elem(fast)?$/) { | |
3590 | return 1; | |
3591 | } | |
3592 | else { | |
3593 | return 0; | |
3594 | } | |
3595 | ||
3596 | return 1; | |
3597 | } | |
3598 | ||
3599 | sub regcomp { | |
6e90668e | 3600 | my $self = shift; |
a9760014 | 3601 | my($op, $cx, $extended) = @_; |
6e90668e | 3602 | my $kid = $op->first; |
3f872cb9 GS |
3603 | $kid = $kid->first if $kid->name eq "regcmaybe"; |
3604 | $kid = $kid->first if $kid->name eq "regcreset"; | |
a9760014 RH |
3605 | return ($self->re_dq($kid, $extended), 1) if $self->pure_string($kid); |
3606 | return ($self->deparse($kid, $cx), 0); | |
3607 | } | |
3608 | ||
3609 | sub pp_regcomp { | |
3610 | my ($self, $op, $cx) = @_; | |
3611 | return (($self->regcomp($op, $cx, 0))[0]); | |
6e90668e SM |
3612 | } |
3613 | ||
6e90668e SM |
3614 | # osmic acid -- see osmium tetroxide |
3615 | ||
3616 | my %matchwords; | |
3617 | map($matchwords{join "", sort split //, $_} = $_, 'cig', 'cog', 'cos', 'cogs', | |
3618 | 'cox', 'go', 'is', 'ism', 'iso', 'mig', 'mix', 'osmic', 'ox', 'sic', | |
3619 | 'sig', 'six', 'smog', 'so', 'soc', 'sog', 'xi'); | |
3620 | ||
90be192f | 3621 | sub matchop { |
6e90668e | 3622 | my $self = shift; |
90be192f | 3623 | my($op, $cx, $name, $delim) = @_; |
6e90668e | 3624 | my $kid = $op->first; |
9d2c6865 | 3625 | my ($binop, $var, $re) = ("", "", ""); |
6e90668e | 3626 | if ($op->flags & OPf_STACKED) { |
9d2c6865 SM |
3627 | $binop = 1; |
3628 | $var = $self->deparse($kid, 20); | |
6e90668e SM |
3629 | $kid = $kid->sibling; |
3630 | } | |
a9760014 RH |
3631 | my $quote = 1; |
3632 | my $extended = ($op->pmflags & PMf_EXTENDED); | |
6e90668e | 3633 | if (null $kid) { |
a9760014 RH |
3634 | my $unbacked = re_unback($op->precomp); |
3635 | if ($extended) { | |
3636 | $re = re_uninterp_extended(escape_extended_re($unbacked)); | |
3637 | } else { | |
3638 | $re = re_uninterp(escape_str(re_unback($op->precomp))); | |
3639 | } | |
3640 | } elsif ($kid->name ne 'regcomp') { | |
ff97752d | 3641 | carp("found ".$kid->name." where regcomp expected"); |
6e90668e | 3642 | } else { |
a9760014 | 3643 | ($re, $quote) = $self->regcomp($kid, 1, $extended); |
6e90668e SM |
3644 | } |
3645 | my $flags = ""; | |
3646 | $flags .= "c" if $op->pmflags & PMf_CONTINUE; | |
3647 | $flags .= "g" if $op->pmflags & PMf_GLOBAL; | |
3648 | $flags .= "i" if $op->pmflags & PMf_FOLD; | |
3649 | $flags .= "m" if $op->pmflags & PMf_MULTILINE; | |
3650 | $flags .= "o" if $op->pmflags & PMf_KEEP; | |
3651 | $flags .= "s" if $op->pmflags & PMf_SINGLELINE; | |
3652 | $flags .= "x" if $op->pmflags & PMf_EXTENDED; | |
3653 | $flags = $matchwords{$flags} if $matchwords{$flags}; | |
3654 | if ($op->pmflags & PMf_ONCE) { # only one kind of delimiter works here | |
3655 | $re =~ s/\?/\\?/g; | |
9d2c6865 | 3656 | $re = "?$re?"; |
a9760014 | 3657 | } elsif ($quote) { |
90be192f | 3658 | $re = single_delim($name, $delim, $re); |
9d2c6865 | 3659 | } |
a9760014 | 3660 | $re = $re . $flags if $quote; |
9d2c6865 SM |
3661 | if ($binop) { |
3662 | return $self->maybe_parens("$var =~ $re", $cx, 20); | |
3663 | } else { | |
3664 | return $re; | |
6e90668e | 3665 | } |
6e90668e SM |
3666 | } |
3667 | ||
90be192f SM |
3668 | sub pp_match { matchop(@_, "m", "/") } |
3669 | sub pp_pushre { matchop(@_, "m", "/") } | |
3670 | sub pp_qr { matchop(@_, "qr", "") } | |
6e90668e SM |
3671 | |
3672 | sub pp_split { | |
3673 | my $self = shift; | |
9d2c6865 | 3674 | my($op, $cx) = @_; |
6e90668e SM |
3675 | my($kid, @exprs, $ary, $expr); |
3676 | $kid = $op->first; | |
3eaf8b6c MB |
3677 | # under ithreads pmreplroot is an integer, not an SV |
3678 | my $replroot = $kid->pmreplroot; | |
3679 | if ( ( ref($replroot) && $$replroot ) || | |
3680 | ( !ref($replroot) && $replroot ) ) { | |
ce4e655d | 3681 | $ary = $self->stash_variable('@', $self->gv_name($kid->pmreplroot)); |
6e90668e SM |
3682 | } |
3683 | for (; !null($kid); $kid = $kid->sibling) { | |
9d2c6865 | 3684 | push @exprs, $self->deparse($kid, 6); |
6e90668e | 3685 | } |
fcd95d64 DD |
3686 | |
3687 | # handle special case of split(), and split(" ") that compiles to /\s+/ | |
3688 | $kid = $op->first; | |
3689 | if ($kid->flags & OPf_SPECIAL | |
3690 | && $exprs[0] eq '/\\s+/' | |
3691 | && $kid->pmflags & PMf_SKIPWHITE ) { | |
3692 | $exprs[0] = '" "'; | |
3693 | } | |
3694 | ||
6e90668e SM |
3695 | $expr = "split(" . join(", ", @exprs) . ")"; |
3696 | if ($ary) { | |
9d2c6865 | 3697 | return $self->maybe_parens("$ary = $expr", $cx, 7); |
6e90668e SM |
3698 | } else { |
3699 | return $expr; | |
3700 | } | |
3701 | } | |
3702 | ||
3703 | # oxime -- any of various compounds obtained chiefly by the action of | |
3704 | # hydroxylamine on aldehydes and ketones and characterized by the | |
3705 | # bivalent grouping C=NOH [Webster's Tenth] | |
3706 | ||
3707 | my %substwords; | |
3708 | map($substwords{join "", sort split //, $_} = $_, 'ego', 'egoism', 'em', | |
3709 | 'es', 'ex', 'exes', 'gee', 'go', 'goes', 'ie', 'ism', 'iso', 'me', | |
3710 | 'meese', 'meso', 'mig', 'mix', 'os', 'ox', 'oxime', 'see', 'seem', | |
3711 | 'seg', 'sex', 'sig', 'six', 'smog', 'sog', 'some', 'xi'); | |
3712 | ||
3713 | sub pp_subst { | |
3714 | my $self = shift; | |
9d2c6865 | 3715 | my($op, $cx) = @_; |
6e90668e | 3716 | my $kid = $op->first; |
9d2c6865 | 3717 | my($binop, $var, $re, $repl) = ("", "", "", ""); |
6e90668e | 3718 | if ($op->flags & OPf_STACKED) { |
9d2c6865 SM |
3719 | $binop = 1; |
3720 | $var = $self->deparse($kid, 20); | |
6e90668e SM |
3721 | $kid = $kid->sibling; |
3722 | } | |
3723 | my $flags = ""; | |
3724 | if (null($op->pmreplroot)) { | |
3725 | $repl = $self->dq($kid); | |
3726 | $kid = $kid->sibling; | |
3727 | } else { | |
3728 | $repl = $op->pmreplroot->first; # skip substcont | |
3f872cb9 | 3729 | while ($repl->name eq "entereval") { |
6e90668e SM |
3730 | $repl = $repl->first; |
3731 | $flags .= "e"; | |
3732 | } | |
bd0865ec GS |
3733 | if ($op->pmflags & PMf_EVAL) { |
3734 | $repl = $self->deparse($repl, 0); | |
3735 | } else { | |
3736 | $repl = $self->dq($repl); | |
3737 | } | |
6e90668e | 3738 | } |
b7dad2dc | 3739 | my $extended = ($op->pmflags & PMf_EXTENDED); |
6e90668e | 3740 | if (null $kid) { |
b7dad2dc RH |
3741 | my $unbacked = re_unback($op->precomp); |
3742 | if ($extended) { | |
3743 | $re = re_uninterp_extended(escape_extended_re($unbacked)); | |
3744 | } | |
3745 | else { | |
3746 | $re = re_uninterp(escape_str($unbacked)); | |
3747 | } | |
6e90668e | 3748 | } else { |
b7dad2dc | 3749 | ($re) = $self->regcomp($kid, 1, $extended); |
a798dbf2 | 3750 | } |
6e90668e SM |
3751 | $flags .= "e" if $op->pmflags & PMf_EVAL; |
3752 | $flags .= "g" if $op->pmflags & PMf_GLOBAL; | |
3753 | $flags .= "i" if $op->pmflags & PMf_FOLD; | |
3754 | $flags .= "m" if $op->pmflags & PMf_MULTILINE; | |
3755 | $flags .= "o" if $op->pmflags & PMf_KEEP; | |
3756 | $flags .= "s" if $op->pmflags & PMf_SINGLELINE; | |
b7dad2dc | 3757 | $flags .= "x" if $extended; |
6e90668e | 3758 | $flags = $substwords{$flags} if $substwords{$flags}; |
9d2c6865 SM |
3759 | if ($binop) { |
3760 | return $self->maybe_parens("$var =~ s" | |
3761 | . double_delim($re, $repl) . $flags, | |
3762 | $cx, 20); | |
3763 | } else { | |
3764 | return "s". double_delim($re, $repl) . $flags; | |
3765 | } | |
a798dbf2 MB |
3766 | } |
3767 | ||
3768 | 1; | |
f6f9bdb7 SM |
3769 | __END__ |
3770 | ||
3771 | =head1 NAME | |
3772 | ||
3773 | B::Deparse - Perl compiler backend to produce perl code | |
3774 | ||
3775 | =head1 SYNOPSIS | |
3776 | ||
646bba82 SM |
3777 | B<perl> B<-MO=Deparse>[B<,-u>I<PACKAGE>][B<,-p>][B<,-q>][B<,-l>] |
3778 | [B<,-s>I<LETTERS>][B<,-x>I<LEVEL>] I<prog.pl> | |
f6f9bdb7 SM |
3779 | |
3780 | =head1 DESCRIPTION | |
3781 | ||
3782 | B::Deparse is a backend module for the Perl compiler that generates | |
3783 | perl source code, based on the internal compiled structure that perl | |
3784 | itself creates after parsing a program. The output of B::Deparse won't | |
3785 | be exactly the same as the original source, since perl doesn't keep | |
3786 | track of comments or whitespace, and there isn't a one-to-one | |
3787 | correspondence between perl's syntactical constructions and their | |
9d2c6865 SM |
3788 | compiled form, but it will often be close. When you use the B<-p> |
3789 | option, the output also includes parentheses even when they are not | |
3790 | required by precedence, which can make it easy to see if perl is | |
3791 | parsing your expressions the way you intended. | |
f6f9bdb7 SM |
3792 | |
3793 | Please note that this module is mainly new and untested code and is | |
3794 | still under development, so it may change in the future. | |
3795 | ||
3796 | =head1 OPTIONS | |
3797 | ||
9d2c6865 SM |
3798 | As with all compiler backend options, these must follow directly after |
3799 | the '-MO=Deparse', separated by a comma but not any white space. | |
f6f9bdb7 SM |
3800 | |
3801 | =over 4 | |
3802 | ||
bd0865ec GS |
3803 | =item B<-l> |
3804 | ||
3805 | Add '#line' declarations to the output based on the line and file | |
3806 | locations of the original code. | |
3807 | ||
9d2c6865 SM |
3808 | =item B<-p> |
3809 | ||
3810 | Print extra parentheses. Without this option, B::Deparse includes | |
3811 | parentheses in its output only when they are needed, based on the | |
3812 | structure of your program. With B<-p>, it uses parentheses (almost) | |
3813 | whenever they would be legal. This can be useful if you are used to | |
3814 | LISP, or if you want to see how perl parses your input. If you say | |
3815 | ||
3816 | if ($var & 0x7f == 65) {print "Gimme an A!"} | |
3817 | print ($which ? $a : $b), "\n"; | |
3818 | $name = $ENV{USER} or "Bob"; | |
3819 | ||
3820 | C<B::Deparse,-p> will print | |
3821 | ||
3822 | if (($var & 0)) { | |
3823 | print('Gimme an A!') | |
3824 | }; | |
3825 | (print(($which ? $a : $b)), '???'); | |
3826 | (($name = $ENV{'USER'}) or '???') | |
3827 | ||
3828 | which probably isn't what you intended (the C<'???'> is a sign that | |
3829 | perl optimized away a constant value). | |
3830 | ||
acaaef34 RGS |
3831 | =item B<-P> |
3832 | ||
3833 | Disable prototype checking. With this option, all function calls are | |
3834 | deparsed as if no prototype was defined for them. In other words, | |
3835 | ||
3836 | perl -MO=Deparse,-P -e 'sub foo (\@) { 1 } foo @x' | |
3837 | ||
3838 | will print | |
3839 | ||
3840 | sub foo (\@) { | |
3841 | 1; | |
3842 | } | |
3843 | &foo(\@x); | |
3844 | ||
3845 | making clear how the parameters are actually passed to C<foo>. | |
3846 | ||
bd0865ec GS |
3847 | =item B<-q> |
3848 | ||
3849 | Expand double-quoted strings into the corresponding combinations of | |
3850 | concatenation, uc, ucfirst, lc, lcfirst, quotemeta, and join. For | |
3851 | instance, print | |
3852 | ||
3853 | print "Hello, $world, @ladies, \u$gentlemen\E, \u\L$me!"; | |
3854 | ||
3855 | as | |
3856 | ||
3857 | print 'Hello, ' . $world . ', ' . join($", @ladies) . ', ' | |
3858 | . ucfirst($gentlemen) . ', ' . ucfirst(lc $me . '!'); | |
3859 | ||
3860 | Note that the expanded form represents the way perl handles such | |
3861 | constructions internally -- this option actually turns off the reverse | |
3862 | translation that B::Deparse usually does. On the other hand, note that | |
3863 | C<$x = "$y"> is not the same as C<$x = $y>: the former makes the value | |
3864 | of $y into a string before doing the assignment. | |
3865 | ||
34a48b4b RH |
3866 | =item B<-f>I<FILE> |
3867 | ||
3868 | Normally, B::Deparse deparses the main code of a program, and all the subs | |
3869 | defined in the same file. To include subs defined in other files, pass the | |
3870 | B<-f> option with the filename. You can pass the B<-f> option several times, to | |
3871 | include more than one secondary file. (Most of the time you don't want to | |
3872 | use it at all.) You can also use this option to include subs which are | |
3873 | defined in the scope of a B<#line> directive with two parameters. | |
f6f9bdb7 | 3874 | |
9d2c6865 SM |
3875 | =item B<-s>I<LETTERS> |
3876 | ||
f4a44678 SM |
3877 | Tweak the style of B::Deparse's output. The letters should follow |
3878 | directly after the 's', with no space or punctuation. The following | |
3879 | options are available: | |
9d2c6865 SM |
3880 | |
3881 | =over 4 | |
3882 | ||
3883 | =item B<C> | |
3884 | ||
3885 | Cuddle C<elsif>, C<else>, and C<continue> blocks. For example, print | |
3886 | ||
3887 | if (...) { | |
3888 | ... | |
3889 | } else { | |
3890 | ... | |
3891 | } | |
3892 | ||
3893 | instead of | |
3894 | ||
3895 | if (...) { | |
3896 | ... | |
3897 | } | |
3898 | else { | |
3899 | ... | |
3900 | } | |
3901 | ||
3902 | The default is not to cuddle. | |
3903 | ||
f4a44678 SM |
3904 | =item B<i>I<NUMBER> |
3905 | ||
3906 | Indent lines by multiples of I<NUMBER> columns. The default is 4 columns. | |
3907 | ||
3908 | =item B<T> | |
3909 | ||
3910 | Use tabs for each 8 columns of indent. The default is to use only spaces. | |
3911 | For instance, if the style options are B<-si4T>, a line that's indented | |
3912 | 3 times will be preceded by one tab and four spaces; if the options were | |
3913 | B<-si8T>, the same line would be preceded by three tabs. | |
3914 | ||
3915 | =item B<v>I<STRING>B<.> | |
3916 | ||
3917 | Print I<STRING> for the value of a constant that can't be determined | |
3918 | because it was optimized away (mnemonic: this happens when a constant | |
3919 | is used in B<v>oid context). The end of the string is marked by a period. | |
3920 | The string should be a valid perl expression, generally a constant. | |
3921 | Note that unless it's a number, it probably needs to be quoted, and on | |
3922 | a command line quotes need to be protected from the shell. Some | |
3923 | conventional values include 0, 1, 42, '', 'foo', and | |
3924 | 'Useless use of constant omitted' (which may need to be | |
3925 | B<-sv"'Useless use of constant omitted'."> | |
3926 | or something similar depending on your shell). The default is '???'. | |
3927 | If you're using B::Deparse on a module or other file that's require'd, | |
3928 | you shouldn't use a value that evaluates to false, since the customary | |
3929 | true constant at the end of a module will be in void context when the | |
3930 | file is compiled as a main program. | |
3931 | ||
9d2c6865 SM |
3932 | =back |
3933 | ||
58cccf98 SM |
3934 | =item B<-x>I<LEVEL> |
3935 | ||
3936 | Expand conventional syntax constructions into equivalent ones that expose | |
3937 | their internal operation. I<LEVEL> should be a digit, with higher values | |
3938 | meaning more expansion. As with B<-q>, this actually involves turning off | |
3939 | special cases in B::Deparse's normal operations. | |
3940 | ||
3941 | If I<LEVEL> is at least 3, for loops will be translated into equivalent | |
646bba82 | 3942 | while loops with continue blocks; for instance |
58cccf98 SM |
3943 | |
3944 | for ($i = 0; $i < 10; ++$i) { | |
3945 | print $i; | |
3946 | } | |
3947 | ||
3948 | turns into | |
3949 | ||
3950 | $i = 0; | |
3951 | while ($i < 10) { | |
3952 | print $i; | |
3953 | } continue { | |
3954 | ++$i | |
3955 | } | |
3956 | ||
3957 | Note that in a few cases this translation can't be perfectly carried back | |
646bba82 | 3958 | into the source code -- if the loop's initializer declares a my variable, |
58cccf98 SM |
3959 | for instance, it won't have the correct scope outside of the loop. |
3960 | ||
3961 | If I<LEVEL> is at least 7, if statements will be translated into equivalent | |
3962 | expressions using C<&&>, C<?:> and C<do {}>; for instance | |
3963 | ||
3964 | print 'hi' if $nice; | |
3965 | if ($nice) { | |
3966 | print 'hi'; | |
3967 | } | |
3968 | if ($nice) { | |
3969 | print 'hi'; | |
3970 | } else { | |
3971 | print 'bye'; | |
3972 | } | |
3973 | ||
3974 | turns into | |
3975 | ||
3976 | $nice and print 'hi'; | |
3977 | $nice and do { print 'hi' }; | |
3978 | $nice ? do { print 'hi' } : do { print 'bye' }; | |
3979 | ||
3980 | Long sequences of elsifs will turn into nested ternary operators, which | |
3981 | B::Deparse doesn't know how to indent nicely. | |
3982 | ||
f6f9bdb7 SM |
3983 | =back |
3984 | ||
f4a44678 SM |
3985 | =head1 USING B::Deparse AS A MODULE |
3986 | ||
3987 | =head2 Synopsis | |
3988 | ||
3989 | use B::Deparse; | |
3990 | $deparse = B::Deparse->new("-p", "-sC"); | |
3991 | $body = $deparse->coderef2text(\&func); | |
3992 | eval "sub func $body"; # the inverse operation | |
3993 | ||
3994 | =head2 Description | |
3995 | ||
3996 | B::Deparse can also be used on a sub-by-sub basis from other perl | |
3997 | programs. | |
3998 | ||
3999 | =head2 new | |
4000 | ||
4001 | $deparse = B::Deparse->new(OPTIONS) | |
4002 | ||
4003 | Create an object to store the state of a deparsing operation and any | |
4004 | options. The options are the same as those that can be given on the | |
4005 | command line (see L</OPTIONS>); options that are separated by commas | |
4006 | after B<-MO=Deparse> should be given as separate strings. Some | |
4007 | options, like B<-u>, don't make sense for a single subroutine, so | |
4008 | don't pass them. | |
4009 | ||
08c6f5ec RH |
4010 | =head2 ambient_pragmas |
4011 | ||
4012 | $deparse->ambient_pragmas(strict => 'all', '$[' => $[); | |
4013 | ||
4014 | The compilation of a subroutine can be affected by a few compiler | |
4015 | directives, B<pragmas>. These are: | |
4016 | ||
4017 | =over 4 | |
4018 | ||
4019 | =item * | |
4020 | ||
4021 | use strict; | |
4022 | ||
4023 | =item * | |
4024 | ||
4025 | use warnings; | |
4026 | ||
4027 | =item * | |
4028 | ||
4029 | Assigning to the special variable $[ | |
4030 | ||
4031 | =item * | |
4032 | ||
4033 | use integer; | |
4034 | ||
a0405c92 RH |
4035 | =item * |
4036 | ||
4037 | use bytes; | |
4038 | ||
4039 | =item * | |
4040 | ||
4041 | use utf8; | |
4042 | ||
4043 | =item * | |
4044 | ||
4045 | use re; | |
4046 | ||
08c6f5ec RH |
4047 | =back |
4048 | ||
4049 | Ordinarily, if you use B::Deparse on a subroutine which has | |
4050 | been compiled in the presence of one or more of these pragmas, | |
4051 | the output will include statements to turn on the appropriate | |
4052 | directives. So if you then compile the code returned by coderef2text, | |
4053 | it will behave the same way as the subroutine which you deparsed. | |
4054 | ||
4055 | However, you may know that you intend to use the results in a | |
4056 | particular context, where some pragmas are already in scope. In | |
4057 | this case, you use the B<ambient_pragmas> method to describe the | |
4058 | assumptions you wish to make. | |
4059 | ||
995e581f RH |
4060 | Not all of the options currently have any useful effect. See |
4061 | L</BUGS> for more details. | |
4062 | ||
08c6f5ec RH |
4063 | The parameters it accepts are: |
4064 | ||
4065 | =over 4 | |
4066 | ||
4067 | =item strict | |
4068 | ||
4069 | Takes a string, possibly containing several values separated | |
4070 | by whitespace. The special values "all" and "none" mean what you'd | |
4071 | expect. | |
4072 | ||
4073 | $deparse->ambient_pragmas(strict => 'subs refs'); | |
4074 | ||
4075 | =item $[ | |
4076 | ||
4077 | Takes a number, the value of the array base $[. | |
4078 | ||
a0405c92 RH |
4079 | =item bytes |
4080 | ||
4081 | =item utf8 | |
4082 | ||
08c6f5ec RH |
4083 | =item integer |
4084 | ||
a0405c92 | 4085 | If the value is true, then the appropriate pragma is assumed to |
08c6f5ec RH |
4086 | be in the ambient scope, otherwise not. |
4087 | ||
a0405c92 RH |
4088 | =item re |
4089 | ||
4090 | Takes a string, possibly containing a whitespace-separated list of | |
4091 | values. The values "all" and "none" are special. It's also permissible | |
4092 | to pass an array reference here. | |
4093 | ||
4094 | $deparser->ambient_pragmas(re => 'eval'); | |
4095 | ||
4096 | ||
08c6f5ec RH |
4097 | =item warnings |
4098 | ||
4099 | Takes a string, possibly containing a whitespace-separated list of | |
4100 | values. The values "all" and "none" are special, again. It's also | |
4101 | permissible to pass an array reference here. | |
4102 | ||
4103 | $deparser->ambient_pragmas(warnings => [qw[void io]]); | |
4104 | ||
4105 | If one of the values is the string "FATAL", then all the warnings | |
4106 | in that list will be considered fatal, just as with the B<warnings> | |
4107 | pragma itself. Should you need to specify that some warnings are | |
4108 | fatal, and others are merely enabled, you can pass the B<warnings> | |
4109 | parameter twice: | |
4110 | ||
4111 | $deparser->ambient_pragmas( | |
4112 | warnings => 'all', | |
4113 | warnings => [FATAL => qw/void io/], | |
4114 | ); | |
4115 | ||
4116 | See L<perllexwarn> for more information about lexical warnings. | |
4117 | ||
4118 | =item hint_bits | |
4119 | ||
4120 | =item warning_bits | |
4121 | ||
4122 | These two parameters are used to specify the ambient pragmas in | |
4123 | the format used by the special variables $^H and ${^WARNING_BITS}. | |
4124 | ||
4125 | They exist principally so that you can write code like: | |
4126 | ||
4127 | { my ($hint_bits, $warning_bits); | |
4128 | BEGIN {($hint_bits, $warning_bits) = ($^H, ${^WARNING_BITS})} | |
4129 | $deparser->ambient_pragmas ( | |
4130 | hint_bits => $hint_bits, | |
4131 | warning_bits => $warning_bits, | |
4132 | '$[' => 0 + $[ | |
4133 | ); } | |
4134 | ||
4135 | which specifies that the ambient pragmas are exactly those which | |
4136 | are in scope at the point of calling. | |
4137 | ||
4138 | =back | |
4139 | ||
f4a44678 SM |
4140 | =head2 coderef2text |
4141 | ||
4142 | $body = $deparse->coderef2text(\&func) | |
4143 | $body = $deparse->coderef2text(sub ($$) { ... }) | |
4144 | ||
4145 | Return source code for the body of a subroutine (a block, optionally | |
4146 | preceded by a prototype in parens), given a reference to the | |
4147 | sub. Because a subroutine can have no names, or more than one name, | |
4148 | this method doesn't return a complete subroutine definition -- if you | |
4149 | want to eval the result, you should prepend "sub subname ", or "sub " | |
4150 | for an anonymous function constructor. Unless the sub was defined in | |
4151 | the main:: package, the code will include a package declaration. | |
4152 | ||
f6f9bdb7 SM |
4153 | =head1 BUGS |
4154 | ||
995e581f RH |
4155 | =over 4 |
4156 | ||
4157 | =item * | |
4158 | ||
4159 | The only pragmas to be completely supported are: C<use warnings>, | |
4160 | C<use strict 'refs'>, C<use bytes>, and C<use integer>. (C<$[>, which | |
4161 | behaves like a pragma, is also supported.) | |
4162 | ||
4163 | Excepting those listed above, we're currently unable to guarantee that | |
4164 | B::Deparse will produce a pragma at the correct point in the program. | |
4165 | Since the effects of pragmas are often lexically scoped, this can mean | |
4166 | that the pragma holds sway over a different portion of the program | |
4167 | than in the input file. | |
4168 | ||
4169 | =item * | |
4170 | ||
c7f67cde RH |
4171 | In fact, the above is a specific instance of a more general problem: |
4172 | we can't guarantee to produce BEGIN blocks or C<use> declarations in | |
4173 | exactly the right place. So if you use a module which affects compilation | |
4174 | (such as by over-riding keywords, overloading constants or whatever) | |
4175 | then the output code might not work as intended. | |
4176 | ||
4177 | This is the most serious outstanding problem, and will be very hard | |
4178 | to fix. | |
4179 | ||
4180 | =item * | |
4181 | ||
995e581f RH |
4182 | If a keyword is over-ridden, and your program explicitly calls |
4183 | the built-in version by using CORE::keyword, the output of B::Deparse | |
c7f67cde RH |
4184 | will not reflect this. If you run the resulting code, it will call |
4185 | the over-ridden version rather than the built-in one. (Maybe there | |
4186 | should be an option to B<always> print keyword calls as C<CORE::name>.) | |
995e581f RH |
4187 | |
4188 | =item * | |
4189 | ||
995e581f RH |
4190 | C<sort foo (1, 2, 3)> comes out as C<sort (foo 1, 2, 3)>, which |
4191 | causes perl to issue a warning. | |
4192 | ||
4193 | The obvious fix doesn't work, because these are different: | |
4194 | ||
4195 | print (FOO 1, 2, 3), 4, 5, 6; | |
4196 | print FOO (1, 2, 3), 4, 5, 6; | |
4197 | ||
4198 | =item * | |
4199 | ||
4200 | Constants (other than simple strings or numbers) don't work properly. | |
b7dad2dc | 4201 | Pathological examples that fail (and probably always will) include: |
995e581f RH |
4202 | |
4203 | use constant E2BIG => ($!=7); | |
4204 | use constant x=>\$x; print x | |
4205 | ||
b7dad2dc RH |
4206 | The following could (and should) be made to work: |
4207 | ||
4208 | use constant regex => qr/blah/; | |
4209 | print regex; | |
4210 | ||
2a9e2f8a RH |
4211 | =item * |
4212 | ||
4213 | An input file that uses source filtering probably won't be deparsed into | |
4214 | runnable code, because it will still include the B<use> declaration | |
4215 | for the source filtering module, even though the code that is | |
4216 | produced is already ordinary Perl which shouldn't be filtered again. | |
4217 | ||
4218 | =item * | |
4219 | ||
4220 | There are probably many more bugs on non-ASCII platforms (EBCDIC). | |
4221 | ||
995e581f | 4222 | =back |
f6f9bdb7 SM |
4223 | |
4224 | =head1 AUTHOR | |
4225 | ||
58cccf98 | 4226 | Stephen McCamant <smcc@CSUA.Berkeley.EDU>, based on an earlier |
f4a44678 | 4227 | version by Malcolm Beattie <mbeattie@sable.ox.ac.uk>, with |
2a9e2f8a | 4228 | contributions from Gisle Aas, James Duncan, Albert Dvornik, Robin |
ad8caead RGS |
4229 | Houston, Hugo van der Sanden, Gurusamy Sarathy, Nick Ing-Simmons, |
4230 | and Rafael Garcia-Suarez. | |
f6f9bdb7 SM |
4231 | |
4232 | =cut |