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6e90668e | 1 | # B::Deparse.pm |
bd0865ec | 2 | # Copyright (c) 1998,1999 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; |
6e90668e | 10 | use Carp 'cluck'; |
4c1f658f | 11 | use B qw(class main_root main_start main_cv svref_2object opnumber |
bd0865ec GS |
12 | OPf_WANT OPf_WANT_VOID OPf_WANT_SCALAR OPf_WANT_LIST |
13 | OPf_KIDS OPf_REF OPf_STACKED OPf_SPECIAL | |
14 | OPpLVAL_INTRO OPpENTERSUB_AMPER OPpSLICE OPpCONST_BARE | |
15 | OPpTRANS_SQUASH OPpTRANS_DELETE OPpTRANS_COMPLEMENT | |
16 | SVf_IOK SVf_NOK SVf_ROK SVf_POK | |
17 | PMf_KEEP PMf_GLOBAL PMf_CONTINUE PMf_EVAL PMf_ONCE | |
18 | PMf_MULTILINE PMf_SINGLELINE PMf_FOLD PMf_EXTENDED); | |
19 | $VERSION = 0.57; | |
a798dbf2 | 20 | use strict; |
a798dbf2 | 21 | |
6e90668e SM |
22 | # Changes between 0.50 and 0.51: |
23 | # - fixed nulled leave with live enter in sort { } | |
24 | # - fixed reference constants (\"str") | |
25 | # - handle empty programs gracefully | |
26 | # - handle infinte loops (for (;;) {}, while (1) {}) | |
27 | # - differentiate between `for my $x ...' and `my $x; for $x ...' | |
28 | # - various minor cleanups | |
29 | # - moved globals into an object | |
30 | # - added `-u', like B::C | |
31 | # - package declarations using cop_stash | |
32 | # - subs, formats and code sorted by cop_seq | |
f6f9bdb7 SM |
33 | # Changes between 0.51 and 0.52: |
34 | # - added pp_threadsv (special variables under USE_THREADS) | |
35 | # - added documentation | |
bd0865ec | 36 | # Changes between 0.52 and 0.53: |
9d2c6865 SM |
37 | # - many changes adding precedence contexts and associativity |
38 | # - added `-p' and `-s' output style options | |
39 | # - various other minor fixes | |
bd0865ec | 40 | # Changes between 0.53 and 0.54: |
d7f5b6da SM |
41 | # - added support for new `for (1..100)' optimization, |
42 | # thanks to Gisle Aas | |
bd0865ec | 43 | # Changes between 0.54 and 0.55: |
90be192f SM |
44 | # - added support for new qr// construct |
45 | # - added support for new pp_regcreset OP | |
bd0865ec | 46 | # Changes between 0.55 and 0.56: |
f5aa8f4e SM |
47 | # - tested on base/*.t, cmd/*.t, comp/*.t, io/*.t |
48 | # - fixed $# on non-lexicals broken in last big rewrite | |
49 | # - added temporary fix for change in opcode of OP_STRINGIFY | |
50 | # - fixed problem in 0.54's for() patch in `for (@ary)' | |
51 | # - fixed precedence in conditional of ?: | |
52 | # - tweaked list paren elimination in `my($x) = @_' | |
53 | # - made continue-block detection trickier wrt. null ops | |
54 | # - fixed various prototype problems in pp_entersub | |
55 | # - added support for sub prototypes that never get GVs | |
56 | # - added unquoting for special filehandle first arg in truncate | |
57 | # - print doubled rv2gv (a bug) as `*{*GV}' instead of illegal `**GV' | |
58 | # - added semicolons at the ends of blocks | |
59 | # - added -l `#line' declaration option -- fixes cmd/subval.t 27,28 | |
bd0865ec GS |
60 | # Changes between 0.56 and 0.561: |
61 | # - fixed multiply-declared my var in pp_truncate (thanks to Sarathy) | |
62 | # - used new B.pm symbolic constants (done by Nick Ing-Simmons) | |
63 | # Changes between 0.561 and 0.57: | |
64 | # - stylistic changes to symbolic constant stuff | |
65 | # - handled scope in s///e replacement code | |
66 | # - added unquote option for expanding "" into concats, etc. | |
67 | # - split method and proto parts of pp_entersub into separate functions | |
68 | # - various minor cleanups | |
6e90668e SM |
69 | |
70 | # Todo: | |
9d2c6865 | 71 | # - {} around variables in strings ("${var}letters") |
f5aa8f4e SM |
72 | # base/lex.t 25-27 |
73 | # comp/term.t 11 | |
90be192f | 74 | # - left/right context |
bd0865ec GS |
75 | # - recognize `use utf8', `use integer', etc |
76 | # - handle swash-based utf8 tr/// (ick, looks hard) | |
f5aa8f4e | 77 | # - avoid semis in one-statement blocks |
9d2c6865 | 78 | # - associativity of &&=, ||=, ?: |
6e90668e SM |
79 | # - ',' => '=>' (auto-unquote?) |
80 | # - break long lines ("\r" as discretionary break?) | |
bd0865ec | 81 | # - ANSI color syntax highlighting? |
f5aa8f4e SM |
82 | # - include values of variables (e.g. set in BEGIN) |
83 | # - coordinate with Data::Dumper (both directions? see previous) | |
6e90668e SM |
84 | # - version using op_next instead of op_first/sibling? |
85 | # - avoid string copies (pass arrays, one big join?) | |
86 | # - auto-apply `-u'? | |
9d2c6865 SM |
87 | # - while{} with one-statement continue => for(; XXX; XXX) {}? |
88 | # - -uPackage:: descend recursively? | |
89 | # - here-docs? | |
90 | # - <DATA>? | |
6e90668e | 91 | |
f5aa8f4e SM |
92 | # Tests that will always fail: |
93 | # comp/redef.t -- all (redefinition happens at compile time) | |
94 | ||
6e90668e SM |
95 | # Object fields (were globals): |
96 | # | |
97 | # avoid_local: | |
98 | # (local($a), local($b)) and local($a, $b) have the same internal | |
99 | # representation but the short form looks better. We notice we can | |
100 | # use a large-scale local when checking the list, but need to prevent | |
101 | # individual locals too. This hash holds the addresses of OPs that | |
102 | # have already had their local-ness accounted for. The same thing | |
103 | # is done with my(). | |
104 | # | |
105 | # curcv: | |
106 | # CV for current sub (or main program) being deparsed | |
107 | # | |
108 | # curstash: | |
109 | # name of the current package for deparsed code | |
110 | # | |
111 | # subs_todo: | |
112 | # array of [cop_seq, GV, is_format?] for subs and formats we still | |
113 | # want to deparse | |
114 | # | |
f5aa8f4e SM |
115 | # protos_todo: |
116 | # as above, but [name, prototype] for subs that never got a GV | |
117 | # | |
6e90668e SM |
118 | # subs_done, forms_done: |
119 | # keys are addresses of GVs for subs and formats we've already | |
120 | # deparsed (or at least put into subs_todo) | |
9d2c6865 SM |
121 | # |
122 | # parens: -p | |
f5aa8f4e | 123 | # linenums: -l |
bd0865ec | 124 | # unquote: -q |
9d2c6865 SM |
125 | # cuddle: ` ' or `\n', depending on -sC |
126 | ||
127 | # A little explanation of how precedence contexts and associativity | |
128 | # work: | |
129 | # | |
130 | # deparse() calls each per-op subroutine with an argument $cx (short | |
131 | # for context, but not the same as the cx* in the perl core), which is | |
132 | # a number describing the op's parents in terms of precedence, whether | |
f5aa8f4e | 133 | # they're inside an expression or at statement level, etc. (see |
9d2c6865 SM |
134 | # chart below). When ops with children call deparse on them, they pass |
135 | # along their precedence. Fractional values are used to implement | |
136 | # associativity (`($x + $y) + $z' => `$x + $y + $y') and related | |
137 | # parentheses hacks. The major disadvantage of this scheme is that | |
138 | # it doesn't know about right sides and left sides, so say if you | |
139 | # assign a listop to a variable, it can't tell it's allowed to leave | |
140 | # the parens off the listop. | |
141 | ||
142 | # Precedences: | |
143 | # 26 [TODO] inside interpolation context ("") | |
144 | # 25 left terms and list operators (leftward) | |
145 | # 24 left -> | |
146 | # 23 nonassoc ++ -- | |
147 | # 22 right ** | |
148 | # 21 right ! ~ \ and unary + and - | |
149 | # 20 left =~ !~ | |
150 | # 19 left * / % x | |
151 | # 18 left + - . | |
152 | # 17 left << >> | |
153 | # 16 nonassoc named unary operators | |
154 | # 15 nonassoc < > <= >= lt gt le ge | |
155 | # 14 nonassoc == != <=> eq ne cmp | |
156 | # 13 left & | |
157 | # 12 left | ^ | |
158 | # 11 left && | |
159 | # 10 left || | |
160 | # 9 nonassoc .. ... | |
161 | # 8 right ?: | |
162 | # 7 right = += -= *= etc. | |
163 | # 6 left , => | |
164 | # 5 nonassoc list operators (rightward) | |
165 | # 4 right not | |
166 | # 3 left and | |
167 | # 2 left or xor | |
168 | # 1 statement modifiers | |
169 | # 0 statement level | |
170 | ||
171 | # Nonprinting characters with special meaning: | |
172 | # \cS - steal parens (see maybe_parens_unop) | |
173 | # \n - newline and indent | |
174 | # \t - increase indent | |
175 | # \b - decrease indent (`outdent') | |
f5aa8f4e | 176 | # \f - flush left (no indent) |
9d2c6865 | 177 | # \cK - kill following semicolon, if any |
6e90668e SM |
178 | |
179 | sub null { | |
180 | my $op = shift; | |
181 | return class($op) eq "NULL"; | |
182 | } | |
183 | ||
184 | sub todo { | |
185 | my $self = shift; | |
186 | my($gv, $cv, $is_form) = @_; | |
187 | my $seq; | |
188 | if (!null($cv->START) and is_state($cv->START)) { | |
189 | $seq = $cv->START->cop_seq; | |
190 | } else { | |
191 | $seq = 0; | |
192 | } | |
193 | push @{$self->{'subs_todo'}}, [$seq, $gv, $is_form]; | |
194 | } | |
195 | ||
196 | sub next_todo { | |
197 | my $self = shift; | |
198 | my $ent = shift @{$self->{'subs_todo'}}; | |
199 | my $name = $self->gv_name($ent->[1]); | |
200 | if ($ent->[2]) { | |
201 | return "format $name =\n" | |
202 | . $self->deparse_format($ent->[1]->FORM). "\n"; | |
203 | } else { | |
204 | return "sub $name " . | |
205 | $self->deparse_sub($ent->[1]->CV); | |
206 | } | |
207 | } | |
208 | ||
6e90668e SM |
209 | sub walk_tree { |
210 | my($op, $sub) = @_; | |
211 | $sub->($op); | |
212 | if ($op->flags & OPf_KIDS) { | |
213 | my $kid; | |
214 | for ($kid = $op->first; not null $kid; $kid = $kid->sibling) { | |
215 | walk_tree($kid, $sub); | |
216 | } | |
217 | } | |
218 | } | |
219 | ||
220 | sub walk_sub { | |
221 | my $self = shift; | |
222 | my $cv = shift; | |
223 | my $op = $cv->ROOT; | |
224 | $op = shift if null $op; | |
225 | return if !$op or null $op; | |
226 | walk_tree($op, sub { | |
227 | my $op = shift; | |
228 | if ($op->ppaddr eq "pp_gv") { | |
229 | if ($op->next->ppaddr eq "pp_entersub") { | |
230 | next if $self->{'subs_done'}{$ {$op->gv}}++; | |
231 | next if class($op->gv->CV) eq "SPECIAL"; | |
232 | $self->todo($op->gv, $op->gv->CV, 0); | |
233 | $self->walk_sub($op->gv->CV); | |
234 | } elsif ($op->next->ppaddr eq "pp_enterwrite" | |
235 | or ($op->next->ppaddr eq "pp_rv2gv" | |
236 | and $op->next->next->ppaddr eq "pp_enterwrite")) { | |
237 | next if $self->{'forms_done'}{$ {$op->gv}}++; | |
238 | next if class($op->gv->FORM) eq "SPECIAL"; | |
239 | $self->todo($op->gv, $op->gv->FORM, 1); | |
240 | $self->walk_sub($op->gv->FORM); | |
241 | } | |
242 | } | |
243 | }); | |
244 | } | |
245 | ||
246 | sub stash_subs { | |
247 | my $self = shift; | |
248 | my $pack = shift; | |
249 | my(%stash, @ret); | |
250 | { no strict 'refs'; %stash = svref_2object(\%{$pack . "::"})->ARRAY } | |
f5aa8f4e SM |
251 | if ($pack eq "main") { |
252 | $pack = ""; | |
253 | } else { | |
254 | $pack = $pack . "::"; | |
255 | } | |
6e90668e SM |
256 | my($key, $val); |
257 | while (($key, $val) = each %stash) { | |
f5aa8f4e SM |
258 | my $class = class($val); |
259 | if ($class eq "PV") { | |
260 | # Just a prototype | |
261 | push @{$self->{'protos_todo'}}, [$pack . $key, $val->PV]; | |
262 | } elsif ($class eq "IV") { | |
263 | # Just a name | |
264 | push @{$self->{'protos_todo'}}, [$pack . $key, undef]; | |
265 | } elsif ($class eq "GV") { | |
266 | if (class($val->CV) ne "SPECIAL") { | |
267 | next if $self->{'subs_done'}{$$val}++; | |
268 | $self->todo($val, $val->CV, 0); | |
269 | $self->walk_sub($val->CV); | |
270 | } | |
271 | if (class($val->FORM) ne "SPECIAL") { | |
272 | next if $self->{'forms_done'}{$$val}++; | |
273 | $self->todo($val, $val->FORM, 1); | |
274 | $self->walk_sub($val->FORM); | |
275 | } | |
6e90668e SM |
276 | } |
277 | } | |
278 | } | |
a798dbf2 | 279 | |
f5aa8f4e SM |
280 | sub print_protos { |
281 | my $self = shift; | |
282 | my $ar; | |
283 | my @ret; | |
284 | foreach $ar (@{$self->{'protos_todo'}}) { | |
285 | my $proto = (defined $ar->[1] ? " (". $ar->[1] . ")" : ""); | |
286 | push @ret, "sub " . $ar->[0] . "$proto;\n"; | |
287 | } | |
288 | delete $self->{'protos_todo'}; | |
289 | return @ret; | |
290 | } | |
291 | ||
9d2c6865 SM |
292 | sub style_opts { |
293 | my $self = shift; | |
294 | my $opts = shift; | |
295 | my $opt; | |
296 | while (length($opt = substr($opts, 0, 1))) { | |
297 | if ($opt eq "C") { | |
298 | $self->{'cuddle'} = " "; | |
299 | } | |
300 | $opts = substr($opts, 1); | |
301 | } | |
302 | } | |
303 | ||
a798dbf2 | 304 | sub compile { |
6e90668e SM |
305 | my(@args) = @_; |
306 | return sub { | |
307 | my $self = bless {}; | |
308 | my $arg; | |
309 | $self->{'subs_todo'} = []; | |
310 | $self->stash_subs("main"); | |
311 | $self->{'curcv'} = main_cv; | |
312 | $self->{'curstash'} = "main"; | |
9d2c6865 | 313 | $self->{'cuddle'} = "\n"; |
6e90668e SM |
314 | while ($arg = shift @args) { |
315 | if (substr($arg, 0, 2) eq "-u") { | |
316 | $self->stash_subs(substr($arg, 2)); | |
9d2c6865 SM |
317 | } elsif ($arg eq "-p") { |
318 | $self->{'parens'} = 1; | |
f5aa8f4e SM |
319 | } elsif ($arg eq "-l") { |
320 | $self->{'linenums'} = 1; | |
bd0865ec GS |
321 | } elsif ($arg eq "-q") { |
322 | $self->{'unquote'} = 1; | |
9d2c6865 SM |
323 | } elsif (substr($arg, 0, 2) eq "-s") { |
324 | $self->style_opts(substr $arg, 2); | |
6e90668e SM |
325 | } |
326 | } | |
327 | $self->walk_sub(main_cv, main_start); | |
f5aa8f4e | 328 | print $self->print_protos; |
6e90668e SM |
329 | @{$self->{'subs_todo'}} = |
330 | sort {$a->[0] <=> $b->[0]} @{$self->{'subs_todo'}}; | |
9d2c6865 | 331 | print indent($self->deparse(main_root, 0)), "\n" unless null main_root; |
6e90668e SM |
332 | my @text; |
333 | while (scalar(@{$self->{'subs_todo'}})) { | |
334 | push @text, $self->next_todo; | |
335 | } | |
336 | print indent(join("", @text)), "\n" if @text; | |
a798dbf2 | 337 | } |
a798dbf2 MB |
338 | } |
339 | ||
6e90668e SM |
340 | sub deparse { |
341 | my $self = shift; | |
9d2c6865 SM |
342 | my($op, $cx) = @_; |
343 | # cluck if class($op) eq "NULL"; | |
bd0865ec | 344 | # return $self->$ {\$op->ppaddr}($op, $cx); |
6e90668e | 345 | my $meth = $op->ppaddr; |
9d2c6865 | 346 | return $self->$meth($op, $cx); |
a798dbf2 MB |
347 | } |
348 | ||
6e90668e SM |
349 | sub indent { |
350 | my $txt = shift; | |
351 | my @lines = split(/\n/, $txt); | |
352 | my $leader = ""; | |
353 | my $line; | |
354 | for $line (@lines) { | |
355 | if (substr($line, 0, 1) eq "\t") { | |
356 | $leader = $leader . " "; | |
357 | $line = substr($line, 1); | |
358 | } elsif (substr($line, 0, 1) eq "\b") { | |
359 | $leader = substr($leader, 0, length($leader) - 4); | |
360 | $line = substr($line, 1); | |
361 | } | |
f5aa8f4e SM |
362 | if (substr($line, 0, 1) eq "\f") { |
363 | $line = substr($line, 1); # no indent | |
364 | } else { | |
365 | $line = $leader . $line; | |
366 | } | |
9d2c6865 | 367 | $line =~ s/\cK;?//g; |
6e90668e SM |
368 | } |
369 | return join("\n", @lines); | |
370 | } | |
371 | ||
6e90668e SM |
372 | sub deparse_sub { |
373 | my $self = shift; | |
374 | my $cv = shift; | |
375 | my $proto = ""; | |
376 | if ($cv->FLAGS & SVf_POK) { | |
377 | $proto = "(". $cv->PV . ") "; | |
378 | } | |
379 | local($self->{'curcv'}) = $cv; | |
380 | local($self->{'curstash'}) = $self->{'curstash'}; | |
381 | if (not null $cv->ROOT) { | |
382 | # skip leavesub | |
383 | return $proto . "{\n\t" . | |
9d2c6865 | 384 | $self->deparse($cv->ROOT->first, 0) . "\n\b}\n"; |
6e90668e SM |
385 | } else { # XSUB? |
386 | return $proto . "{}\n"; | |
387 | } | |
388 | } | |
389 | ||
390 | sub deparse_format { | |
391 | my $self = shift; | |
392 | my $form = shift; | |
393 | my @text; | |
394 | local($self->{'curcv'}) = $form; | |
395 | local($self->{'curstash'}) = $self->{'curstash'}; | |
396 | my $op = $form->ROOT; | |
397 | my $kid; | |
398 | $op = $op->first->first; # skip leavewrite, lineseq | |
399 | while (not null $op) { | |
400 | $op = $op->sibling; # skip nextstate | |
401 | my @exprs; | |
402 | $kid = $op->first->sibling; # skip pushmark | |
403 | push @text, $kid->sv->PV; | |
404 | $kid = $kid->sibling; | |
405 | for (; not null $kid; $kid = $kid->sibling) { | |
9d2c6865 | 406 | push @exprs, $self->deparse($kid, 0); |
6e90668e SM |
407 | } |
408 | push @text, join(", ", @exprs)."\n" if @exprs; | |
409 | $op = $op->sibling; | |
410 | } | |
411 | return join("", @text) . "."; | |
412 | } | |
413 | ||
6e90668e | 414 | sub is_scope { |
a798dbf2 | 415 | my $op = shift; |
6e90668e | 416 | return $op->ppaddr eq "pp_leave" || $op->ppaddr eq "pp_scope" |
9d2c6865 | 417 | || $op->ppaddr eq "pp_lineseq" |
6e90668e SM |
418 | || ($op->ppaddr eq "pp_null" && class($op) eq "UNOP" |
419 | && (is_scope($op->first) || $op->first->ppaddr eq "pp_enter")); | |
420 | } | |
421 | ||
422 | sub is_state { | |
423 | my $name = $_[0]->ppaddr; | |
424 | return $name eq "pp_nextstate" || $name eq "pp_dbstate"; | |
425 | } | |
426 | ||
427 | sub is_miniwhile { # check for one-line loop (`foo() while $y--') | |
428 | my $op = shift; | |
429 | return (!null($op) and null($op->sibling) | |
430 | and $op->ppaddr eq "pp_null" and class($op) eq "UNOP" | |
431 | and (($op->first->ppaddr =~ /^pp_(and|or)$/ | |
432 | and $op->first->first->sibling->ppaddr eq "pp_lineseq") | |
433 | or ($op->first->ppaddr eq "pp_lineseq" | |
434 | and not null $op->first->first->sibling | |
435 | and $op->first->first->sibling->ppaddr eq "pp_unstack") | |
436 | )); | |
437 | } | |
438 | ||
439 | sub is_scalar { | |
440 | my $op = shift; | |
441 | return ($op->ppaddr eq "pp_rv2sv" or | |
442 | $op->ppaddr eq "pp_padsv" or | |
443 | $op->ppaddr eq "pp_gv" or # only in array/hash constructs | |
bd0865ec GS |
444 | $op->flags & OPf_KIDS && !null($op->first) |
445 | && $op->first->ppaddr eq "pp_gvsv"); | |
6e90668e SM |
446 | } |
447 | ||
9d2c6865 SM |
448 | sub maybe_parens { |
449 | my $self = shift; | |
450 | my($text, $cx, $prec) = @_; | |
451 | if ($prec < $cx # unary ops nest just fine | |
452 | or $prec == $cx and $cx != 4 and $cx != 16 and $cx != 21 | |
453 | or $self->{'parens'}) | |
454 | { | |
455 | $text = "($text)"; | |
456 | # In a unop, let parent reuse our parens; see maybe_parens_unop | |
457 | $text = "\cS" . $text if $cx == 16; | |
458 | return $text; | |
459 | } else { | |
460 | return $text; | |
461 | } | |
462 | } | |
463 | ||
464 | # same as above, but get around the `if it looks like a function' rule | |
465 | sub maybe_parens_unop { | |
466 | my $self = shift; | |
467 | my($name, $kid, $cx) = @_; | |
468 | if ($cx > 16 or $self->{'parens'}) { | |
469 | return "$name(" . $self->deparse($kid, 1) . ")"; | |
470 | } else { | |
471 | $kid = $self->deparse($kid, 16); | |
472 | if (substr($kid, 0, 1) eq "\cS") { | |
473 | # use kid's parens | |
474 | return $name . substr($kid, 1); | |
475 | } elsif (substr($kid, 0, 1) eq "(") { | |
476 | # avoid looks-like-a-function trap with extra parens | |
477 | # (`+' can lead to ambiguities) | |
478 | return "$name(" . $kid . ")"; | |
479 | } else { | |
480 | return "$name $kid"; | |
481 | } | |
482 | } | |
483 | } | |
484 | ||
485 | sub maybe_parens_func { | |
486 | my $self = shift; | |
487 | my($func, $text, $cx, $prec) = @_; | |
488 | if ($prec <= $cx or substr($text, 0, 1) eq "(" or $self->{'parens'}) { | |
489 | return "$func($text)"; | |
490 | } else { | |
491 | return "$func $text"; | |
492 | } | |
493 | } | |
494 | ||
6e90668e SM |
495 | sub maybe_local { |
496 | my $self = shift; | |
9d2c6865 | 497 | my($op, $cx, $text) = @_; |
4c1f658f | 498 | if ($op->private & OPpLVAL_INTRO and not $self->{'avoid_local'}{$$op}) { |
9d2c6865 | 499 | return $self->maybe_parens_func("local", $text, $cx, 16); |
6e90668e SM |
500 | } else { |
501 | return $text; | |
a798dbf2 | 502 | } |
a798dbf2 MB |
503 | } |
504 | ||
6e90668e SM |
505 | sub padname_sv { |
506 | my $self = shift; | |
507 | my $targ = shift; | |
508 | return (($self->{'curcv'}->PADLIST->ARRAY)[0]->ARRAY)[$targ]; | |
509 | } | |
510 | ||
511 | sub maybe_my { | |
512 | my $self = shift; | |
9d2c6865 | 513 | my($op, $cx, $text) = @_; |
4c1f658f | 514 | if ($op->private & OPpLVAL_INTRO and not $self->{'avoid_local'}{$$op}) { |
9d2c6865 | 515 | return $self->maybe_parens_func("my", $text, $cx, 16); |
6e90668e SM |
516 | } else { |
517 | return $text; | |
518 | } | |
519 | } | |
520 | ||
9d2c6865 SM |
521 | # The following OPs don't have functions: |
522 | ||
523 | # pp_padany -- does not exist after parsing | |
524 | # pp_rcatline -- does not exist | |
525 | ||
526 | sub pp_enter { # see also leave | |
527 | cluck "unexpected OP_ENTER"; | |
528 | return "XXX"; | |
529 | } | |
530 | ||
531 | sub pp_pushmark { # see also list | |
532 | cluck "unexpected OP_PUSHMARK"; | |
533 | return "XXX"; | |
534 | } | |
535 | ||
536 | sub pp_leavesub { # see also deparse_sub | |
537 | cluck "unexpected OP_LEAVESUB"; | |
538 | return "XXX"; | |
539 | } | |
540 | ||
541 | sub pp_leavewrite { # see also deparse_format | |
542 | cluck "unexpected OP_LEAVEWRITE"; | |
543 | return "XXX"; | |
544 | } | |
545 | ||
546 | sub pp_method { # see also entersub | |
547 | cluck "unexpected OP_METHOD"; | |
548 | return "XXX"; | |
549 | } | |
550 | ||
551 | sub pp_regcmaybe { # see also regcomp | |
552 | cluck "unexpected OP_REGCMAYBE"; | |
553 | return "XXX"; | |
554 | } | |
555 | ||
90be192f SM |
556 | sub pp_regcreset { # see also regcomp |
557 | cluck "unexpected OP_REGCRESET"; | |
558 | return "XXX"; | |
559 | } | |
560 | ||
9d2c6865 SM |
561 | sub pp_substcont { # see also subst |
562 | cluck "unexpected OP_SUBSTCONT"; | |
563 | return "XXX"; | |
564 | } | |
565 | ||
566 | sub pp_grepstart { # see also grepwhile | |
567 | cluck "unexpected OP_GREPSTART"; | |
568 | return "XXX"; | |
569 | } | |
570 | ||
571 | sub pp_mapstart { # see also mapwhile | |
572 | cluck "unexpected OP_MAPSTART"; | |
573 | return "XXX"; | |
574 | } | |
575 | ||
576 | sub pp_flip { # see also flop | |
577 | cluck "unexpected OP_FLIP"; | |
578 | return "XXX"; | |
579 | } | |
580 | ||
581 | sub pp_iter { # see also leaveloop | |
582 | cluck "unexpected OP_ITER"; | |
583 | return "XXX"; | |
584 | } | |
585 | ||
586 | sub pp_enteriter { # see also leaveloop | |
587 | cluck "unexpected OP_ENTERITER"; | |
588 | return "XXX"; | |
589 | } | |
590 | ||
591 | sub pp_enterloop { # see also leaveloop | |
592 | cluck "unexpected OP_ENTERLOOP"; | |
593 | return "XXX"; | |
594 | } | |
595 | ||
596 | sub pp_leaveeval { # see also entereval | |
597 | cluck "unexpected OP_LEAVEEVAL"; | |
598 | return "XXX"; | |
599 | } | |
600 | ||
601 | sub pp_entertry { # see also leavetry | |
602 | cluck "unexpected OP_ENTERTRY"; | |
603 | return "XXX"; | |
604 | } | |
6e90668e | 605 | |
9d2c6865 | 606 | # leave and scope/lineseq should probably share code |
a798dbf2 | 607 | sub pp_leave { |
6e90668e | 608 | my $self = shift; |
9d2c6865 | 609 | my($op, $cx) = @_; |
6e90668e SM |
610 | my ($kid, $expr); |
611 | my @exprs; | |
612 | local($self->{'curstash'}) = $self->{'curstash'}; | |
613 | $kid = $op->first->sibling; # skip enter | |
614 | if (is_miniwhile($kid)) { | |
615 | my $top = $kid->first; | |
616 | my $name = $top->ppaddr; | |
617 | if ($name eq "pp_and") { | |
618 | $name = "while"; | |
619 | } elsif ($name eq "pp_or") { | |
620 | $name = "until"; | |
621 | } else { # no conditional -> while 1 or until 0 | |
9d2c6865 | 622 | return $self->deparse($top->first, 1) . " while 1"; |
6e90668e SM |
623 | } |
624 | my $cond = $top->first; | |
9d2c6865 SM |
625 | my $body = $cond->sibling->first; # skip lineseq |
626 | $cond = $self->deparse($cond, 1); | |
627 | $body = $self->deparse($body, 1); | |
6e90668e SM |
628 | return "$body $name $cond"; |
629 | } | |
630 | for (; !null($kid); $kid = $kid->sibling) { | |
631 | $expr = ""; | |
632 | if (is_state $kid) { | |
9d2c6865 | 633 | $expr = $self->deparse($kid, 0); |
6e90668e SM |
634 | $kid = $kid->sibling; |
635 | last if null $kid; | |
636 | } | |
9d2c6865 | 637 | $expr .= $self->deparse($kid, 0); |
6e90668e SM |
638 | push @exprs, $expr if $expr; |
639 | } | |
9d2c6865 SM |
640 | if ($cx > 0) { # inside an expression |
641 | return "do { " . join(";\n", @exprs) . " }"; | |
642 | } else { | |
f5aa8f4e | 643 | return join(";\n", @exprs) . ";"; |
9d2c6865 | 644 | } |
6e90668e SM |
645 | } |
646 | ||
647 | sub pp_scope { | |
648 | my $self = shift; | |
9d2c6865 | 649 | my($op, $cx) = @_; |
6e90668e SM |
650 | my ($kid, $expr); |
651 | my @exprs; | |
652 | for ($kid = $op->first; !null($kid); $kid = $kid->sibling) { | |
653 | $expr = ""; | |
654 | if (is_state $kid) { | |
9d2c6865 | 655 | $expr = $self->deparse($kid, 0); |
6e90668e SM |
656 | $kid = $kid->sibling; |
657 | last if null $kid; | |
658 | } | |
9d2c6865 | 659 | $expr .= $self->deparse($kid, 0); |
6e90668e SM |
660 | push @exprs, $expr if $expr; |
661 | } | |
9d2c6865 SM |
662 | if ($cx > 0) { # inside an expression, (a do {} while for lineseq) |
663 | return "do { " . join(";\n", @exprs) . " }"; | |
664 | } else { | |
f5aa8f4e | 665 | return join(";\n", @exprs) . ";"; |
6e90668e | 666 | } |
6e90668e SM |
667 | } |
668 | ||
9d2c6865 SM |
669 | sub pp_lineseq { pp_scope(@_) } |
670 | ||
6e90668e SM |
671 | # The BEGIN {} is used here because otherwise this code isn't executed |
672 | # when you run B::Deparse on itself. | |
673 | my %globalnames; | |
674 | BEGIN { map($globalnames{$_}++, "SIG", "STDIN", "STDOUT", "STDERR", "INC", | |
675 | "ENV", "ARGV", "ARGVOUT", "_"); } | |
676 | ||
677 | sub gv_name { | |
678 | my $self = shift; | |
679 | my $gv = shift; | |
680 | my $stash = $gv->STASH->NAME; | |
681 | my $name = $gv->NAME; | |
9d2c6865 SM |
682 | if ($stash eq $self->{'curstash'} or $globalnames{$name} |
683 | or $name =~ /^[^A-Za-z_]/) | |
684 | { | |
6e90668e SM |
685 | $stash = ""; |
686 | } else { | |
687 | $stash = $stash . "::"; | |
a798dbf2 | 688 | } |
6e90668e SM |
689 | if ($name =~ /^([\cA-\cZ])$/) { |
690 | $name = "^" . chr(64 + ord($1)); | |
691 | } | |
692 | return $stash . $name; | |
a798dbf2 MB |
693 | } |
694 | ||
6e90668e SM |
695 | # Notice how subs and formats are inserted between statements here |
696 | sub pp_nextstate { | |
697 | my $self = shift; | |
9d2c6865 | 698 | my($op, $cx) = @_; |
6e90668e SM |
699 | my @text; |
700 | @text = $op->label . ": " if $op->label; | |
701 | my $seq = $op->cop_seq; | |
702 | while (scalar(@{$self->{'subs_todo'}}) | |
703 | and $seq > $self->{'subs_todo'}[0][0]) { | |
704 | push @text, $self->next_todo; | |
705 | } | |
706 | my $stash = $op->stash->NAME; | |
707 | if ($stash ne $self->{'curstash'}) { | |
708 | push @text, "package $stash;\n"; | |
709 | $self->{'curstash'} = $stash; | |
710 | } | |
f5aa8f4e SM |
711 | if ($self->{'linenums'}) { |
712 | push @text, "\f#line " . $op->line . | |
713 | ' "' . substr($op->filegv->NAME, 2), qq'"\n'; | |
714 | } | |
6e90668e SM |
715 | return join("", @text); |
716 | } | |
717 | ||
718 | sub pp_dbstate { pp_nextstate(@_) } | |
719 | ||
720 | sub pp_unstack { return "" } # see also leaveloop | |
721 | ||
722 | sub baseop { | |
723 | my $self = shift; | |
9d2c6865 | 724 | my($op, $cx, $name) = @_; |
6e90668e SM |
725 | return $name; |
726 | } | |
727 | ||
728 | sub pp_stub { baseop(@_, "()") } | |
729 | sub pp_wantarray { baseop(@_, "wantarray") } | |
730 | sub pp_fork { baseop(@_, "fork") } | |
731 | sub pp_wait { baseop(@_, "wait") } | |
732 | sub pp_getppid { baseop(@_, "getppid") } | |
733 | sub pp_time { baseop(@_, "time") } | |
734 | sub pp_tms { baseop(@_, "times") } | |
735 | sub pp_ghostent { baseop(@_, "gethostent") } | |
736 | sub pp_gnetent { baseop(@_, "getnetent") } | |
737 | sub pp_gprotoent { baseop(@_, "getprotoent") } | |
738 | sub pp_gservent { baseop(@_, "getservent") } | |
739 | sub pp_ehostent { baseop(@_, "endhostent") } | |
740 | sub pp_enetent { baseop(@_, "endnetent") } | |
741 | sub pp_eprotoent { baseop(@_, "endprotoent") } | |
742 | sub pp_eservent { baseop(@_, "endservent") } | |
743 | sub pp_gpwent { baseop(@_, "getpwent") } | |
744 | sub pp_spwent { baseop(@_, "setpwent") } | |
745 | sub pp_epwent { baseop(@_, "endpwent") } | |
746 | sub pp_ggrent { baseop(@_, "getgrent") } | |
747 | sub pp_sgrent { baseop(@_, "setgrent") } | |
748 | sub pp_egrent { baseop(@_, "endgrent") } | |
749 | sub pp_getlogin { baseop(@_, "getlogin") } | |
750 | ||
751 | sub POSTFIX () { 1 } | |
752 | ||
9d2c6865 SM |
753 | # I couldn't think of a good short name, but this is the category of |
754 | # symbolic unary operators with interesting precedence | |
755 | ||
756 | sub pfixop { | |
757 | my $self = shift; | |
758 | my($op, $cx, $name, $prec, $flags) = (@_, 0); | |
759 | my $kid = $op->first; | |
760 | $kid = $self->deparse($kid, $prec); | |
761 | return $self->maybe_parens(($flags & POSTFIX) ? "$kid$name" : "$name$kid", | |
762 | $cx, $prec); | |
763 | } | |
764 | ||
765 | sub pp_preinc { pfixop(@_, "++", 23) } | |
766 | sub pp_predec { pfixop(@_, "--", 23) } | |
767 | sub pp_postinc { pfixop(@_, "++", 23, POSTFIX) } | |
768 | sub pp_postdec { pfixop(@_, "--", 23, POSTFIX) } | |
769 | sub pp_i_preinc { pfixop(@_, "++", 23) } | |
770 | sub pp_i_predec { pfixop(@_, "--", 23) } | |
771 | sub pp_i_postinc { pfixop(@_, "++", 23, POSTFIX) } | |
772 | sub pp_i_postdec { pfixop(@_, "--", 23, POSTFIX) } | |
773 | sub pp_complement { pfixop(@_, "~", 21) } | |
774 | ||
775 | sub pp_negate { | |
776 | my $self = shift; | |
777 | my($op, $cx) = @_; | |
778 | if ($op->first->ppaddr =~ /^pp_(i_)?negate$/) { | |
779 | # avoid --$x | |
780 | $self->pfixop($op, $cx, "-", 21.5); | |
781 | } else { | |
782 | $self->pfixop($op, $cx, "-", 21); | |
783 | } | |
784 | } | |
785 | sub pp_i_negate { pp_negate(@_) } | |
786 | ||
787 | sub pp_not { | |
788 | my $self = shift; | |
789 | my($op, $cx) = @_; | |
790 | if ($cx <= 4) { | |
791 | $self->pfixop($op, $cx, "not ", 4); | |
792 | } else { | |
793 | $self->pfixop($op, $cx, "!", 21); | |
794 | } | |
795 | } | |
796 | ||
6e90668e SM |
797 | sub unop { |
798 | my $self = shift; | |
9d2c6865 | 799 | my($op, $cx, $name, $prec, $flags) = (@_, 0, 0); |
6e90668e | 800 | my $kid; |
9d2c6865 | 801 | if ($op->flags & OPf_KIDS) { |
6e90668e | 802 | $kid = $op->first; |
9d2c6865 | 803 | return $self->maybe_parens_unop($name, $kid, $cx); |
6e90668e | 804 | } else { |
9d2c6865 | 805 | return $name . ($op->flags & OPf_SPECIAL ? "()" : ""); |
6e90668e | 806 | } |
6e90668e SM |
807 | } |
808 | ||
6e90668e SM |
809 | sub pp_chop { unop(@_, "chop") } |
810 | sub pp_chomp { unop(@_, "chomp") } | |
811 | sub pp_schop { unop(@_, "chop") } | |
812 | sub pp_schomp { unop(@_, "chomp") } | |
813 | sub pp_defined { unop(@_, "defined") } | |
814 | sub pp_undef { unop(@_, "undef") } | |
815 | sub pp_study { unop(@_, "study") } | |
6e90668e SM |
816 | sub pp_ref { unop(@_, "ref") } |
817 | sub pp_pos { maybe_local(@_, unop(@_, "pos")) } | |
818 | ||
819 | sub pp_sin { unop(@_, "sin") } | |
820 | sub pp_cos { unop(@_, "cos") } | |
821 | sub pp_rand { unop(@_, "rand") } | |
822 | sub pp_srand { unop(@_, "srand") } | |
823 | sub pp_exp { unop(@_, "exp") } | |
824 | sub pp_log { unop(@_, "log") } | |
825 | sub pp_sqrt { unop(@_, "sqrt") } | |
826 | sub pp_int { unop(@_, "int") } | |
827 | sub pp_hex { unop(@_, "hex") } | |
828 | sub pp_oct { unop(@_, "oct") } | |
829 | sub pp_abs { unop(@_, "abs") } | |
830 | ||
831 | sub pp_length { unop(@_, "length") } | |
832 | sub pp_ord { unop(@_, "ord") } | |
833 | sub pp_chr { unop(@_, "chr") } | |
6e90668e SM |
834 | |
835 | sub pp_each { unop(@_, "each") } | |
836 | sub pp_values { unop(@_, "values") } | |
837 | sub pp_keys { unop(@_, "keys") } | |
838 | sub pp_pop { unop(@_, "pop") } | |
839 | sub pp_shift { unop(@_, "shift") } | |
840 | ||
841 | sub pp_caller { unop(@_, "caller") } | |
842 | sub pp_reset { unop(@_, "reset") } | |
843 | sub pp_exit { unop(@_, "exit") } | |
844 | sub pp_prototype { unop(@_, "prototype") } | |
845 | ||
846 | sub pp_close { unop(@_, "close") } | |
847 | sub pp_fileno { unop(@_, "fileno") } | |
848 | sub pp_umask { unop(@_, "umask") } | |
849 | sub pp_binmode { unop(@_, "binmode") } | |
850 | sub pp_untie { unop(@_, "untie") } | |
851 | sub pp_tied { unop(@_, "tied") } | |
852 | sub pp_dbmclose { unop(@_, "dbmclose") } | |
853 | sub pp_getc { unop(@_, "getc") } | |
854 | sub pp_eof { unop(@_, "eof") } | |
855 | sub pp_tell { unop(@_, "tell") } | |
856 | sub pp_getsockname { unop(@_, "getsockname") } | |
857 | sub pp_getpeername { unop(@_, "getpeername") } | |
858 | ||
859 | sub pp_chdir { unop(@_, "chdir") } | |
860 | sub pp_chroot { unop(@_, "chroot") } | |
861 | sub pp_readlink { unop(@_, "readlink") } | |
862 | sub pp_rmdir { unop(@_, "rmdir") } | |
863 | sub pp_readdir { unop(@_, "readdir") } | |
864 | sub pp_telldir { unop(@_, "telldir") } | |
865 | sub pp_rewinddir { unop(@_, "rewinddir") } | |
866 | sub pp_closedir { unop(@_, "closedir") } | |
867 | sub pp_getpgrp { unop(@_, "getpgrp") } | |
868 | sub pp_localtime { unop(@_, "localtime") } | |
869 | sub pp_gmtime { unop(@_, "gmtime") } | |
870 | sub pp_alarm { unop(@_, "alarm") } | |
871 | sub pp_sleep { unop(@_, "sleep") } | |
872 | ||
873 | sub pp_dofile { unop(@_, "do") } | |
874 | sub pp_entereval { unop(@_, "eval") } | |
875 | ||
876 | sub pp_ghbyname { unop(@_, "gethostbyname") } | |
877 | sub pp_gnbyname { unop(@_, "getnetbyname") } | |
878 | sub pp_gpbyname { unop(@_, "getprotobyname") } | |
879 | sub pp_shostent { unop(@_, "sethostent") } | |
880 | sub pp_snetent { unop(@_, "setnetent") } | |
881 | sub pp_sprotoent { unop(@_, "setprotoent") } | |
882 | sub pp_sservent { unop(@_, "setservent") } | |
883 | sub pp_gpwnam { unop(@_, "getpwnam") } | |
884 | sub pp_gpwuid { unop(@_, "getpwuid") } | |
885 | sub pp_ggrnam { unop(@_, "getgrnam") } | |
886 | sub pp_ggrgid { unop(@_, "getgrgid") } | |
887 | ||
888 | sub pp_lock { unop(@_, "lock") } | |
889 | ||
890 | sub pp_exists { | |
891 | my $self = shift; | |
9d2c6865 SM |
892 | my($op, $cx) = @_; |
893 | return $self->maybe_parens_func("exists", $self->pp_helem($op->first, 16), | |
894 | $cx, 16); | |
6e90668e SM |
895 | } |
896 | ||
6e90668e SM |
897 | sub pp_delete { |
898 | my $self = shift; | |
9d2c6865 | 899 | my($op, $cx) = @_; |
6e90668e SM |
900 | my $arg; |
901 | if ($op->private & OPpSLICE) { | |
9d2c6865 SM |
902 | return $self->maybe_parens_func("delete", |
903 | $self->pp_hslice($op->first, 16), | |
904 | $cx, 16); | |
6e90668e | 905 | } else { |
9d2c6865 SM |
906 | return $self->maybe_parens_func("delete", |
907 | $self->pp_helem($op->first, 16), | |
908 | $cx, 16); | |
6e90668e | 909 | } |
6e90668e SM |
910 | } |
911 | ||
6e90668e SM |
912 | sub pp_require { |
913 | my $self = shift; | |
9d2c6865 | 914 | my($op, $cx) = @_; |
6e90668e | 915 | if (class($op) eq "UNOP" and $op->first->ppaddr eq "pp_const" |
4c1f658f | 916 | and $op->first->private & OPpCONST_BARE) |
6e90668e SM |
917 | { |
918 | my $name = $op->first->sv->PV; | |
919 | $name =~ s[/][::]g; | |
920 | $name =~ s/\.pm//g; | |
921 | return "require($name)"; | |
922 | } else { | |
9d2c6865 | 923 | $self->unop($op, $cx, "require"); |
6e90668e SM |
924 | } |
925 | } | |
926 | ||
9d2c6865 SM |
927 | sub pp_scalar { |
928 | my $self = shift; | |
929 | my($op, $cv) = @_; | |
930 | my $kid = $op->first; | |
931 | if (not null $kid->sibling) { | |
932 | # XXX Was a here-doc | |
933 | return $self->dquote($op); | |
934 | } | |
935 | $self->unop(@_, "scalar"); | |
936 | } | |
937 | ||
938 | ||
6e90668e SM |
939 | sub padval { |
940 | my $self = shift; | |
941 | my $targ = shift; | |
942 | return (($self->{'curcv'}->PADLIST->ARRAY)[1]->ARRAY)[$targ]; | |
943 | } | |
944 | ||
945 | sub pp_refgen { | |
946 | my $self = shift; | |
9d2c6865 | 947 | my($op, $cx) = @_; |
6e90668e SM |
948 | my $kid = $op->first; |
949 | if ($kid->ppaddr eq "pp_null") { | |
950 | $kid = $kid->first; | |
951 | if ($kid->ppaddr eq "pp_anonlist" || $kid->ppaddr eq "pp_anonhash") { | |
952 | my($pre, $post) = @{{"pp_anonlist" => ["[","]"], | |
953 | "pp_anonhash" => ["{","}"]}->{$kid->ppaddr}}; | |
954 | my($expr, @exprs); | |
955 | $kid = $kid->first->sibling; # skip pushmark | |
956 | for (; !null($kid); $kid = $kid->sibling) { | |
9d2c6865 | 957 | $expr = $self->deparse($kid, 6); |
6e90668e SM |
958 | push @exprs, $expr; |
959 | } | |
960 | return $pre . join(", ", @exprs) . $post; | |
961 | } elsif (!null($kid->sibling) and | |
962 | $kid->sibling->ppaddr eq "pp_anoncode") { | |
963 | return "sub " . | |
964 | $self->deparse_sub($self->padval($kid->sibling->targ)); | |
c8c62db7 AD |
965 | } elsif ($kid->ppaddr eq "pp_pushmark") { |
966 | my $sib_ppaddr = $kid->sibling->ppaddr; | |
967 | if ($sib_ppaddr =~ /^pp_(pad|rv2)[ah]v$/ | |
968 | and not $kid->sibling->flags & OPf_REF) | |
969 | { | |
970 | # The @a in \(@a) isn't in ref context, but only when the | |
971 | # parens are there. | |
972 | return "\\(" . $self->deparse($kid->sibling, 1) . ")"; | |
973 | } elsif ($kid->sibling->ppaddr eq 'pp_entersub') { | |
974 | my $text = $self->deparse($kid->sibling, 1); | |
975 | # Always show parens for \(&func()), but only with -p otherwise | |
976 | $text = "($text)" if $self->{'parens'} | |
977 | or $kid->sibling->private & OPpENTERSUB_AMPER; | |
978 | return "\\$text"; | |
979 | } | |
980 | } | |
6e90668e | 981 | } |
9d2c6865 | 982 | $self->pfixop($op, $cx, "\\", 20); |
6e90668e SM |
983 | } |
984 | ||
985 | sub pp_srefgen { pp_refgen(@_) } | |
986 | ||
987 | sub pp_readline { | |
988 | my $self = shift; | |
9d2c6865 | 989 | my($op, $cx) = @_; |
6e90668e SM |
990 | my $kid = $op->first; |
991 | $kid = $kid->first if $kid->ppaddr eq "pp_rv2gv"; # <$fh> | |
9d2c6865 | 992 | return "<" . $self->deparse($kid, 1) . ">"; |
6e90668e SM |
993 | } |
994 | ||
bd0865ec GS |
995 | # Unary operators that can occur as pseudo-listops inside double quotes |
996 | sub dq_unop { | |
997 | my $self = shift; | |
998 | my($op, $cx, $name, $prec, $flags) = (@_, 0, 0); | |
999 | my $kid; | |
1000 | if ($op->flags & OPf_KIDS) { | |
1001 | $kid = $op->first; | |
1002 | # If there's more than one kid, the first is an ex-pushmark. | |
1003 | $kid = $kid->sibling if not null $kid->sibling; | |
1004 | return $self->maybe_parens_unop($name, $kid, $cx); | |
1005 | } else { | |
1006 | return $name . ($op->flags & OPf_SPECIAL ? "()" : ""); | |
1007 | } | |
1008 | } | |
1009 | ||
1010 | sub pp_ucfirst { dq_unop(@_, "ucfirst") } | |
1011 | sub pp_lcfirst { dq_unop(@_, "lcfirst") } | |
1012 | sub pp_uc { dq_unop(@_, "uc") } | |
1013 | sub pp_lc { dq_unop(@_, "lc") } | |
1014 | sub pp_quotemeta { dq_unop(@_, "quotemeta") } | |
1015 | ||
6e90668e SM |
1016 | sub loopex { |
1017 | my $self = shift; | |
9d2c6865 | 1018 | my ($op, $cx, $name) = @_; |
6e90668e | 1019 | if (class($op) eq "PVOP") { |
9d2c6865 SM |
1020 | return "$name " . $op->pv; |
1021 | } elsif (class($op) eq "OP") { | |
1022 | return $name; | |
6e90668e | 1023 | } elsif (class($op) eq "UNOP") { |
9d2c6865 SM |
1024 | # Note -- loop exits are actually exempt from the |
1025 | # looks-like-a-func rule, but a few extra parens won't hurt | |
1026 | return $self->maybe_parens_unop($name, $op->first, $cx); | |
6e90668e | 1027 | } |
6e90668e SM |
1028 | } |
1029 | ||
1030 | sub pp_last { loopex(@_, "last") } | |
1031 | sub pp_next { loopex(@_, "next") } | |
1032 | sub pp_redo { loopex(@_, "redo") } | |
1033 | sub pp_goto { loopex(@_, "goto") } | |
1034 | sub pp_dump { loopex(@_, "dump") } | |
1035 | ||
1036 | sub ftst { | |
1037 | my $self = shift; | |
9d2c6865 | 1038 | my($op, $cx, $name) = @_; |
6e90668e | 1039 | if (class($op) eq "UNOP") { |
9d2c6865 SM |
1040 | # Genuine `-X' filetests are exempt from the LLAFR, but not |
1041 | # l?stat(); for the sake of clarity, give'em all parens | |
1042 | return $self->maybe_parens_unop($name, $op->first, $cx); | |
6e90668e | 1043 | } elsif (class($op) eq "GVOP") { |
9d2c6865 | 1044 | return $self->maybe_parens_func($name, $self->pp_gv($op, 1), $cx, 16); |
6e90668e | 1045 | } else { # I don't think baseop filetests ever survive ck_ftst, but... |
9d2c6865 | 1046 | return $name; |
6e90668e | 1047 | } |
6e90668e SM |
1048 | } |
1049 | ||
1050 | sub pp_lstat { ftst(@_, "lstat") } | |
1051 | sub pp_stat { ftst(@_, "stat") } | |
1052 | sub pp_ftrread { ftst(@_, "-R") } | |
1053 | sub pp_ftrwrite { ftst(@_, "-W") } | |
1054 | sub pp_ftrexec { ftst(@_, "-X") } | |
1055 | sub pp_fteread { ftst(@_, "-r") } | |
1056 | sub pp_ftewrite { ftst(@_, "-r") } | |
1057 | sub pp_fteexec { ftst(@_, "-r") } | |
1058 | sub pp_ftis { ftst(@_, "-e") } | |
1059 | sub pp_fteowned { ftst(@_, "-O") } | |
1060 | sub pp_ftrowned { ftst(@_, "-o") } | |
1061 | sub pp_ftzero { ftst(@_, "-z") } | |
1062 | sub pp_ftsize { ftst(@_, "-s") } | |
1063 | sub pp_ftmtime { ftst(@_, "-M") } | |
1064 | sub pp_ftatime { ftst(@_, "-A") } | |
1065 | sub pp_ftctime { ftst(@_, "-C") } | |
1066 | sub pp_ftsock { ftst(@_, "-S") } | |
1067 | sub pp_ftchr { ftst(@_, "-c") } | |
1068 | sub pp_ftblk { ftst(@_, "-b") } | |
1069 | sub pp_ftfile { ftst(@_, "-f") } | |
1070 | sub pp_ftdir { ftst(@_, "-d") } | |
1071 | sub pp_ftpipe { ftst(@_, "-p") } | |
1072 | sub pp_ftlink { ftst(@_, "-l") } | |
1073 | sub pp_ftsuid { ftst(@_, "-u") } | |
1074 | sub pp_ftsgid { ftst(@_, "-g") } | |
1075 | sub pp_ftsvtx { ftst(@_, "-k") } | |
1076 | sub pp_fttty { ftst(@_, "-t") } | |
1077 | sub pp_fttext { ftst(@_, "-T") } | |
1078 | sub pp_ftbinary { ftst(@_, "-B") } | |
1079 | ||
a798dbf2 | 1080 | sub SWAP_CHILDREN () { 1 } |
6e90668e SM |
1081 | sub ASSIGN () { 2 } # has OP= variant |
1082 | ||
9d2c6865 SM |
1083 | my(%left, %right); |
1084 | ||
1085 | sub assoc_class { | |
1086 | my $op = shift; | |
1087 | my $name = $op->ppaddr; | |
1088 | if ($name eq "pp_concat" and $op->first->ppaddr eq "pp_concat") { | |
1089 | # avoid spurious `=' -- see comment in pp_concat | |
1090 | return "pp_concat"; | |
1091 | } | |
1092 | if ($name eq "pp_null" and class($op) eq "UNOP" | |
1093 | and $op->first->ppaddr =~ /^pp_(and|x?or)$/ | |
1094 | and null $op->first->sibling) | |
1095 | { | |
1096 | # Like all conditional constructs, OP_ANDs and OP_ORs are topped | |
1097 | # with a null that's used as the common end point of the two | |
1098 | # flows of control. For precedence purposes, ignore it. | |
1099 | # (COND_EXPRs have these too, but we don't bother with | |
1100 | # their associativity). | |
1101 | return assoc_class($op->first); | |
1102 | } | |
1103 | return $name . ($op->flags & OPf_STACKED ? "=" : ""); | |
1104 | } | |
1105 | ||
1106 | # Left associative operators, like `+', for which | |
1107 | # $a + $b + $c is equivalent to ($a + $b) + $c | |
1108 | ||
1109 | BEGIN { | |
1110 | %left = ('pp_multiply' => 19, 'pp_i_multiply' => 19, | |
1111 | 'pp_divide' => 19, 'pp_i_divide' => 19, | |
1112 | 'pp_modulo' => 19, 'pp_i_modulo' => 19, | |
1113 | 'pp_repeat' => 19, | |
1114 | 'pp_add' => 18, 'pp_i_add' => 18, | |
1115 | 'pp_subtract' => 18, 'pp_i_subtract' => 18, | |
1116 | 'pp_concat' => 18, | |
1117 | 'pp_left_shift' => 17, 'pp_right_shift' => 17, | |
1118 | 'pp_bit_and' => 13, | |
1119 | 'pp_bit_or' => 12, 'pp_bit_xor' => 12, | |
1120 | 'pp_and' => 3, | |
1121 | 'pp_or' => 2, 'pp_xor' => 2, | |
1122 | ); | |
1123 | } | |
1124 | ||
1125 | sub deparse_binop_left { | |
1126 | my $self = shift; | |
1127 | my($op, $left, $prec) = @_; | |
1128 | if ($left{assoc_class($op)} | |
1129 | and $left{assoc_class($op)} == $left{assoc_class($left)}) | |
1130 | { | |
1131 | return $self->deparse($left, $prec - .00001); | |
1132 | } else { | |
1133 | return $self->deparse($left, $prec); | |
1134 | } | |
1135 | } | |
1136 | ||
1137 | # Right associative operators, like `=', for which | |
1138 | # $a = $b = $c is equivalent to $a = ($b = $c) | |
1139 | ||
1140 | BEGIN { | |
1141 | %right = ('pp_pow' => 22, | |
1142 | 'pp_sassign=' => 7, 'pp_aassign=' => 7, | |
1143 | 'pp_multiply=' => 7, 'pp_i_multiply=' => 7, | |
1144 | 'pp_divide=' => 7, 'pp_i_divide=' => 7, | |
1145 | 'pp_modulo=' => 7, 'pp_i_modulo=' => 7, | |
1146 | 'pp_repeat=' => 7, | |
1147 | 'pp_add=' => 7, 'pp_i_add=' => 7, | |
1148 | 'pp_subtract=' => 7, 'pp_i_subtract=' => 7, | |
1149 | 'pp_concat=' => 7, | |
1150 | 'pp_left_shift=' => 7, 'pp_right_shift=' => 7, | |
1151 | 'pp_bit_and=' => 7, | |
1152 | 'pp_bit_or=' => 7, 'pp_bit_xor=' => 7, | |
1153 | 'pp_andassign' => 7, | |
1154 | 'pp_orassign' => 7, | |
1155 | ); | |
1156 | } | |
1157 | ||
1158 | sub deparse_binop_right { | |
1159 | my $self = shift; | |
1160 | my($op, $right, $prec) = @_; | |
1161 | if ($right{assoc_class($op)} | |
1162 | and $right{assoc_class($op)} == $right{assoc_class($right)}) | |
1163 | { | |
1164 | return $self->deparse($right, $prec - .00001); | |
1165 | } else { | |
1166 | return $self->deparse($right, $prec); | |
1167 | } | |
1168 | } | |
1169 | ||
a798dbf2 | 1170 | sub binop { |
6e90668e | 1171 | my $self = shift; |
9d2c6865 | 1172 | my ($op, $cx, $opname, $prec, $flags) = (@_, 0); |
a798dbf2 MB |
1173 | my $left = $op->first; |
1174 | my $right = $op->last; | |
9d2c6865 SM |
1175 | my $eq = ""; |
1176 | if ($op->flags & OPf_STACKED && $flags & ASSIGN) { | |
1177 | $eq = "="; | |
1178 | $prec = 7; | |
1179 | } | |
a798dbf2 MB |
1180 | if ($flags & SWAP_CHILDREN) { |
1181 | ($left, $right) = ($right, $left); | |
1182 | } | |
9d2c6865 SM |
1183 | $left = $self->deparse_binop_left($op, $left, $prec); |
1184 | $right = $self->deparse_binop_right($op, $right, $prec); | |
1185 | return $self->maybe_parens("$left $opname$eq $right", $cx, $prec); | |
1186 | } | |
1187 | ||
1188 | sub pp_add { binop(@_, "+", 18, ASSIGN) } | |
1189 | sub pp_multiply { binop(@_, "*", 19, ASSIGN) } | |
1190 | sub pp_subtract { binop(@_, "-",18, ASSIGN) } | |
1191 | sub pp_divide { binop(@_, "/", 19, ASSIGN) } | |
1192 | sub pp_modulo { binop(@_, "%", 19, ASSIGN) } | |
1193 | sub pp_i_add { binop(@_, "+", 18, ASSIGN) } | |
1194 | sub pp_i_multiply { binop(@_, "*", 19, ASSIGN) } | |
1195 | sub pp_i_subtract { binop(@_, "-", 18, ASSIGN) } | |
1196 | sub pp_i_divide { binop(@_, "/", 19, ASSIGN) } | |
1197 | sub pp_i_modulo { binop(@_, "%", 19, ASSIGN) } | |
1198 | sub pp_pow { binop(@_, "**", 22, ASSIGN) } | |
1199 | ||
1200 | sub pp_left_shift { binop(@_, "<<", 17, ASSIGN) } | |
1201 | sub pp_right_shift { binop(@_, ">>", 17, ASSIGN) } | |
1202 | sub pp_bit_and { binop(@_, "&", 13, ASSIGN) } | |
1203 | sub pp_bit_or { binop(@_, "|", 12, ASSIGN) } | |
1204 | sub pp_bit_xor { binop(@_, "^", 12, ASSIGN) } | |
1205 | ||
1206 | sub pp_eq { binop(@_, "==", 14) } | |
1207 | sub pp_ne { binop(@_, "!=", 14) } | |
1208 | sub pp_lt { binop(@_, "<", 15) } | |
1209 | sub pp_gt { binop(@_, ">", 15) } | |
1210 | sub pp_ge { binop(@_, ">=", 15) } | |
1211 | sub pp_le { binop(@_, "<=", 15) } | |
1212 | sub pp_ncmp { binop(@_, "<=>", 14) } | |
1213 | sub pp_i_eq { binop(@_, "==", 14) } | |
1214 | sub pp_i_ne { binop(@_, "!=", 14) } | |
1215 | sub pp_i_lt { binop(@_, "<", 15) } | |
1216 | sub pp_i_gt { binop(@_, ">", 15) } | |
1217 | sub pp_i_ge { binop(@_, ">=", 15) } | |
1218 | sub pp_i_le { binop(@_, "<=", 15) } | |
1219 | sub pp_i_ncmp { binop(@_, "<=>", 14) } | |
1220 | ||
1221 | sub pp_seq { binop(@_, "eq", 14) } | |
1222 | sub pp_sne { binop(@_, "ne", 14) } | |
1223 | sub pp_slt { binop(@_, "lt", 15) } | |
1224 | sub pp_sgt { binop(@_, "gt", 15) } | |
1225 | sub pp_sge { binop(@_, "ge", 15) } | |
1226 | sub pp_sle { binop(@_, "le", 15) } | |
1227 | sub pp_scmp { binop(@_, "cmp", 14) } | |
1228 | ||
1229 | sub pp_sassign { binop(@_, "=", 7, SWAP_CHILDREN) } | |
1230 | sub pp_aassign { binop(@_, "=", 7, SWAP_CHILDREN) } | |
6e90668e SM |
1231 | |
1232 | # `.' is special because concats-of-concats are optimized to save copying | |
1233 | # by making all but the first concat stacked. The effect is as if the | |
1234 | # programmer had written `($a . $b) .= $c', except legal. | |
1235 | sub pp_concat { | |
1236 | my $self = shift; | |
9d2c6865 | 1237 | my($op, $cx) = @_; |
6e90668e SM |
1238 | my $left = $op->first; |
1239 | my $right = $op->last; | |
1240 | my $eq = ""; | |
9d2c6865 | 1241 | my $prec = 18; |
6e90668e SM |
1242 | if ($op->flags & OPf_STACKED and $op->first->ppaddr ne "pp_concat") { |
1243 | $eq = "="; | |
9d2c6865 | 1244 | $prec = 7; |
6e90668e | 1245 | } |
9d2c6865 SM |
1246 | $left = $self->deparse_binop_left($op, $left, $prec); |
1247 | $right = $self->deparse_binop_right($op, $right, $prec); | |
1248 | return $self->maybe_parens("$left .$eq $right", $cx, $prec); | |
6e90668e SM |
1249 | } |
1250 | ||
1251 | # `x' is weird when the left arg is a list | |
1252 | sub pp_repeat { | |
1253 | my $self = shift; | |
9d2c6865 | 1254 | my($op, $cx) = @_; |
6e90668e SM |
1255 | my $left = $op->first; |
1256 | my $right = $op->last; | |
9d2c6865 SM |
1257 | my $eq = ""; |
1258 | my $prec = 19; | |
1259 | if ($op->flags & OPf_STACKED) { | |
1260 | $eq = "="; | |
1261 | $prec = 7; | |
1262 | } | |
6e90668e SM |
1263 | if (null($right)) { # list repeat; count is inside left-side ex-list |
1264 | my $kid = $left->first->sibling; # skip pushmark | |
1265 | my @exprs; | |
1266 | for (; !null($kid->sibling); $kid = $kid->sibling) { | |
9d2c6865 | 1267 | push @exprs, $self->deparse($kid, 6); |
6e90668e SM |
1268 | } |
1269 | $right = $kid; | |
1270 | $left = "(" . join(", ", @exprs). ")"; | |
1271 | } else { | |
9d2c6865 | 1272 | $left = $self->deparse_binop_left($op, $left, $prec); |
6e90668e | 1273 | } |
9d2c6865 SM |
1274 | $right = $self->deparse_binop_right($op, $right, $prec); |
1275 | return $self->maybe_parens("$left x$eq $right", $cx, $prec); | |
6e90668e SM |
1276 | } |
1277 | ||
1278 | sub range { | |
1279 | my $self = shift; | |
9d2c6865 | 1280 | my ($op, $cx, $type) = @_; |
6e90668e SM |
1281 | my $left = $op->first; |
1282 | my $right = $left->sibling; | |
9d2c6865 SM |
1283 | $left = $self->deparse($left, 9); |
1284 | $right = $self->deparse($right, 9); | |
1285 | return $self->maybe_parens("$left $type $right", $cx, 9); | |
6e90668e SM |
1286 | } |
1287 | ||
1288 | sub pp_flop { | |
1289 | my $self = shift; | |
9d2c6865 | 1290 | my($op, $cx) = @_; |
6e90668e SM |
1291 | my $flip = $op->first; |
1292 | my $type = ($flip->flags & OPf_SPECIAL) ? "..." : ".."; | |
9d2c6865 | 1293 | return $self->range($flip->first, $cx, $type); |
6e90668e SM |
1294 | } |
1295 | ||
1296 | # one-line while/until is handled in pp_leave | |
1297 | ||
1298 | sub logop { | |
1299 | my $self = shift; | |
9d2c6865 | 1300 | my ($op, $cx, $lowop, $lowprec, $highop, $highprec, $blockname) = @_; |
6e90668e SM |
1301 | my $left = $op->first; |
1302 | my $right = $op->first->sibling; | |
9d2c6865 SM |
1303 | if ($cx == 0 and is_scope($right) and $blockname) { # if ($a) {$b} |
1304 | $left = $self->deparse($left, 1); | |
1305 | $right = $self->deparse($right, 0); | |
1306 | return "$blockname ($left) {\n\t$right\n\b}\cK"; | |
1307 | } elsif ($cx == 0 and $blockname and not $self->{'parens'}) { # $b if $a | |
1308 | $right = $self->deparse($right, 1); | |
1309 | $left = $self->deparse($left, 1); | |
1310 | return "$right $blockname $left"; | |
1311 | } elsif ($cx > $lowprec and $highop) { # $a && $b | |
1312 | $left = $self->deparse_binop_left($op, $left, $highprec); | |
1313 | $right = $self->deparse_binop_right($op, $right, $highprec); | |
1314 | return $self->maybe_parens("$left $highop $right", $cx, $highprec); | |
1315 | } else { # $a and $b | |
1316 | $left = $self->deparse_binop_left($op, $left, $lowprec); | |
1317 | $right = $self->deparse_binop_right($op, $right, $lowprec); | |
1318 | return $self->maybe_parens("$left $lowop $right", $cx, $lowprec); | |
1319 | } | |
1320 | } | |
1321 | ||
1322 | sub pp_and { logop(@_, "and", 3, "&&", 11, "if") } | |
1323 | sub pp_or { logop(@_, "or", 2, "||", 10, "unless") } | |
1324 | sub pp_xor { logop(@_, "xor", 2, "", 0, "") } | |
6e90668e SM |
1325 | |
1326 | sub logassignop { | |
1327 | my $self = shift; | |
9d2c6865 | 1328 | my ($op, $cx, $opname) = @_; |
6e90668e SM |
1329 | my $left = $op->first; |
1330 | my $right = $op->first->sibling->first; # skip sassign | |
9d2c6865 SM |
1331 | $left = $self->deparse($left, 7); |
1332 | $right = $self->deparse($right, 7); | |
1333 | return $self->maybe_parens("$left $opname $right", $cx, 7); | |
a798dbf2 MB |
1334 | } |
1335 | ||
6e90668e SM |
1336 | sub pp_andassign { logassignop(@_, "&&=") } |
1337 | sub pp_orassign { logassignop(@_, "||=") } | |
1338 | ||
1339 | sub listop { | |
1340 | my $self = shift; | |
9d2c6865 SM |
1341 | my($op, $cx, $name) = @_; |
1342 | my(@exprs); | |
1343 | my $parens = ($cx >= 5) || $self->{'parens'}; | |
1344 | my $kid = $op->first->sibling; | |
1345 | return $name if null $kid; | |
1346 | my $first = $self->deparse($kid, 6); | |
1347 | $first = "+$first" if not $parens and substr($first, 0, 1) eq "("; | |
1348 | push @exprs, $first; | |
1349 | $kid = $kid->sibling; | |
1350 | for (; !null($kid); $kid = $kid->sibling) { | |
1351 | push @exprs, $self->deparse($kid, 6); | |
1352 | } | |
1353 | if ($parens) { | |
1354 | return "$name(" . join(", ", @exprs) . ")"; | |
1355 | } else { | |
1356 | return "$name " . join(", ", @exprs); | |
6e90668e | 1357 | } |
6e90668e | 1358 | } |
a798dbf2 | 1359 | |
6e90668e SM |
1360 | sub pp_bless { listop(@_, "bless") } |
1361 | sub pp_atan2 { listop(@_, "atan2") } | |
1362 | sub pp_substr { maybe_local(@_, listop(@_, "substr")) } | |
1363 | sub pp_vec { maybe_local(@_, listop(@_, "vec")) } | |
1364 | sub pp_index { listop(@_, "index") } | |
1365 | sub pp_rindex { listop(@_, "rindex") } | |
1366 | sub pp_sprintf { listop(@_, "sprintf") } | |
1367 | sub pp_formline { listop(@_, "formline") } # see also deparse_format | |
1368 | sub pp_crypt { listop(@_, "crypt") } | |
1369 | sub pp_unpack { listop(@_, "unpack") } | |
1370 | sub pp_pack { listop(@_, "pack") } | |
1371 | sub pp_join { listop(@_, "join") } | |
1372 | sub pp_splice { listop(@_, "splice") } | |
1373 | sub pp_push { listop(@_, "push") } | |
1374 | sub pp_unshift { listop(@_, "unshift") } | |
1375 | sub pp_reverse { listop(@_, "reverse") } | |
1376 | sub pp_warn { listop(@_, "warn") } | |
1377 | sub pp_die { listop(@_, "die") } | |
9d2c6865 SM |
1378 | # Actually, return is exempt from the LLAFR (see examples in this very |
1379 | # module!), but for consistency's sake, ignore that fact | |
6e90668e SM |
1380 | sub pp_return { listop(@_, "return") } |
1381 | sub pp_open { listop(@_, "open") } | |
1382 | sub pp_pipe_op { listop(@_, "pipe") } | |
1383 | sub pp_tie { listop(@_, "tie") } | |
1384 | sub pp_dbmopen { listop(@_, "dbmopen") } | |
1385 | sub pp_sselect { listop(@_, "select") } | |
1386 | sub pp_select { listop(@_, "select") } | |
1387 | sub pp_read { listop(@_, "read") } | |
1388 | sub pp_sysopen { listop(@_, "sysopen") } | |
1389 | sub pp_sysseek { listop(@_, "sysseek") } | |
1390 | sub pp_sysread { listop(@_, "sysread") } | |
1391 | sub pp_syswrite { listop(@_, "syswrite") } | |
1392 | sub pp_send { listop(@_, "send") } | |
1393 | sub pp_recv { listop(@_, "recv") } | |
1394 | sub pp_seek { listop(@_, "seek") } | |
6e90668e SM |
1395 | sub pp_fcntl { listop(@_, "fcntl") } |
1396 | sub pp_ioctl { listop(@_, "ioctl") } | |
1397 | sub pp_flock { listop(@_, "flock") } | |
1398 | sub pp_socket { listop(@_, "socket") } | |
1399 | sub pp_sockpair { listop(@_, "sockpair") } | |
1400 | sub pp_bind { listop(@_, "bind") } | |
1401 | sub pp_connect { listop(@_, "connect") } | |
1402 | sub pp_listen { listop(@_, "listen") } | |
1403 | sub pp_accept { listop(@_, "accept") } | |
1404 | sub pp_shutdown { listop(@_, "shutdown") } | |
1405 | sub pp_gsockopt { listop(@_, "getsockopt") } | |
1406 | sub pp_ssockopt { listop(@_, "setsockopt") } | |
1407 | sub pp_chown { listop(@_, "chown") } | |
1408 | sub pp_unlink { listop(@_, "unlink") } | |
1409 | sub pp_chmod { listop(@_, "chmod") } | |
1410 | sub pp_utime { listop(@_, "utime") } | |
1411 | sub pp_rename { listop(@_, "rename") } | |
1412 | sub pp_link { listop(@_, "link") } | |
1413 | sub pp_symlink { listop(@_, "symlink") } | |
1414 | sub pp_mkdir { listop(@_, "mkdir") } | |
1415 | sub pp_open_dir { listop(@_, "opendir") } | |
1416 | sub pp_seekdir { listop(@_, "seekdir") } | |
1417 | sub pp_waitpid { listop(@_, "waitpid") } | |
1418 | sub pp_system { listop(@_, "system") } | |
1419 | sub pp_exec { listop(@_, "exec") } | |
1420 | sub pp_kill { listop(@_, "kill") } | |
1421 | sub pp_setpgrp { listop(@_, "setpgrp") } | |
1422 | sub pp_getpriority { listop(@_, "getpriority") } | |
1423 | sub pp_setpriority { listop(@_, "setpriority") } | |
1424 | sub pp_shmget { listop(@_, "shmget") } | |
1425 | sub pp_shmctl { listop(@_, "shmctl") } | |
1426 | sub pp_shmread { listop(@_, "shmread") } | |
1427 | sub pp_shmwrite { listop(@_, "shmwrite") } | |
1428 | sub pp_msgget { listop(@_, "msgget") } | |
1429 | sub pp_msgctl { listop(@_, "msgctl") } | |
1430 | sub pp_msgsnd { listop(@_, "msgsnd") } | |
1431 | sub pp_msgrcv { listop(@_, "msgrcv") } | |
1432 | sub pp_semget { listop(@_, "semget") } | |
1433 | sub pp_semctl { listop(@_, "semctl") } | |
1434 | sub pp_semop { listop(@_, "semop") } | |
1435 | sub pp_ghbyaddr { listop(@_, "gethostbyaddr") } | |
1436 | sub pp_gnbyaddr { listop(@_, "getnetbyaddr") } | |
1437 | sub pp_gpbynumber { listop(@_, "getprotobynumber") } | |
1438 | sub pp_gsbyname { listop(@_, "getservbyname") } | |
1439 | sub pp_gsbyport { listop(@_, "getservbyport") } | |
1440 | sub pp_syscall { listop(@_, "syscall") } | |
1441 | ||
1442 | sub pp_glob { | |
1443 | my $self = shift; | |
9d2c6865 | 1444 | my($op, $cx) = @_; |
6e90668e SM |
1445 | my $text = $self->dq($op->first->sibling); # skip pushmark |
1446 | if ($text =~ /^\$?(\w|::|\`)+$/ # could look like a readline | |
1447 | or $text =~ /[<>]/) { | |
1448 | return 'glob(' . single_delim('qq', '"', $text) . ')'; | |
1449 | } else { | |
1450 | return '<' . $text . '>'; | |
1451 | } | |
1452 | } | |
1453 | ||
f5aa8f4e SM |
1454 | # Truncate is special because OPf_SPECIAL makes a bareword first arg |
1455 | # be a filehandle. This could probably be better fixed in the core | |
1456 | # by moving the GV lookup into ck_truc. | |
1457 | ||
1458 | sub pp_truncate { | |
1459 | my $self = shift; | |
1460 | my($op, $cx) = @_; | |
1461 | my(@exprs); | |
1462 | my $parens = ($cx >= 5) || $self->{'parens'}; | |
1463 | my $kid = $op->first->sibling; | |
acba1d67 | 1464 | my $fh; |
f5aa8f4e SM |
1465 | if ($op->flags & OPf_SPECIAL) { |
1466 | # $kid is an OP_CONST | |
1467 | $fh = $kid->sv->PV; | |
1468 | } else { | |
1469 | $fh = $self->deparse($kid, 6); | |
1470 | $fh = "+$fh" if not $parens and substr($fh, 0, 1) eq "("; | |
1471 | } | |
1472 | my $len = $self->deparse($kid->sibling, 6); | |
1473 | if ($parens) { | |
1474 | return "truncate($fh, $len)"; | |
1475 | } else { | |
1476 | return "truncate $fh, $len"; | |
1477 | } | |
f5aa8f4e SM |
1478 | } |
1479 | ||
6e90668e SM |
1480 | sub indirop { |
1481 | my $self = shift; | |
9d2c6865 | 1482 | my($op, $cx, $name) = @_; |
6e90668e SM |
1483 | my($expr, @exprs); |
1484 | my $kid = $op->first->sibling; | |
1485 | my $indir = ""; | |
1486 | if ($op->flags & OPf_STACKED) { | |
1487 | $indir = $kid; | |
1488 | $indir = $indir->first; # skip rv2gv | |
1489 | if (is_scope($indir)) { | |
9d2c6865 | 1490 | $indir = "{" . $self->deparse($indir, 0) . "}"; |
6e90668e | 1491 | } else { |
9d2c6865 | 1492 | $indir = $self->deparse($indir, 24); |
6e90668e SM |
1493 | } |
1494 | $indir = $indir . " "; | |
1495 | $kid = $kid->sibling; | |
1496 | } | |
1497 | for (; !null($kid); $kid = $kid->sibling) { | |
9d2c6865 | 1498 | $expr = $self->deparse($kid, 6); |
6e90668e SM |
1499 | push @exprs, $expr; |
1500 | } | |
9d2c6865 SM |
1501 | return $self->maybe_parens_func($name, |
1502 | $indir . join(", ", @exprs), | |
1503 | $cx, 5); | |
6e90668e SM |
1504 | } |
1505 | ||
1506 | sub pp_prtf { indirop(@_, "printf") } | |
1507 | sub pp_print { indirop(@_, "print") } | |
1508 | sub pp_sort { indirop(@_, "sort") } | |
1509 | ||
1510 | sub mapop { | |
1511 | my $self = shift; | |
9d2c6865 | 1512 | my($op, $cx, $name) = @_; |
6e90668e SM |
1513 | my($expr, @exprs); |
1514 | my $kid = $op->first; # this is the (map|grep)start | |
1515 | $kid = $kid->first->sibling; # skip a pushmark | |
1516 | my $code = $kid->first; # skip a null | |
1517 | if (is_scope $code) { | |
9d2c6865 | 1518 | $code = "{" . $self->deparse($code, 1) . "} "; |
6e90668e | 1519 | } else { |
9d2c6865 | 1520 | $code = $self->deparse($code, 24) . ", "; |
6e90668e SM |
1521 | } |
1522 | $kid = $kid->sibling; | |
1523 | for (; !null($kid); $kid = $kid->sibling) { | |
9d2c6865 | 1524 | $expr = $self->deparse($kid, 6); |
6e90668e SM |
1525 | push @exprs, $expr if $expr; |
1526 | } | |
9d2c6865 | 1527 | return $self->maybe_parens_func($name, $code . join(", ", @exprs), $cx, 5); |
6e90668e SM |
1528 | } |
1529 | ||
1530 | sub pp_mapwhile { mapop(@_, "map") } | |
1531 | sub pp_grepwhile { mapop(@_, "grep") } | |
1532 | ||
1533 | sub pp_list { | |
1534 | my $self = shift; | |
9d2c6865 | 1535 | my($op, $cx) = @_; |
6e90668e SM |
1536 | my($expr, @exprs); |
1537 | my $kid = $op->first->sibling; # skip pushmark | |
1538 | my $lop; | |
1539 | my $local = "either"; # could be local(...) or my(...) | |
1540 | for ($lop = $kid; !null($lop); $lop = $lop->sibling) { | |
1541 | # This assumes that no other private flags equal 128, and that | |
1542 | # OPs that store things other than flags in their op_private, | |
1543 | # like OP_AELEMFAST, won't be immediate children of a list. | |
4c1f658f | 1544 | unless ($lop->private & OPpLVAL_INTRO or $lop->ppaddr eq "pp_undef") |
6e90668e SM |
1545 | { |
1546 | $local = ""; # or not | |
1547 | last; | |
1548 | } | |
1549 | if ($lop->ppaddr =~ /^pp_pad[ash]v$/) { # my() | |
1550 | ($local = "", last) if $local eq "local"; | |
1551 | $local = "my"; | |
1552 | } elsif ($lop->ppaddr ne "pp_undef") { # local() | |
1553 | ($local = "", last) if $local eq "my"; | |
1554 | $local = "local"; | |
1555 | } | |
1556 | } | |
1557 | $local = "" if $local eq "either"; # no point if it's all undefs | |
f5aa8f4e | 1558 | return $self->deparse($kid, $cx) if null $kid->sibling and not $local; |
6e90668e SM |
1559 | for (; !null($kid); $kid = $kid->sibling) { |
1560 | if ($local) { | |
1561 | if (class($kid) eq "UNOP" and $kid->first->ppaddr eq "pp_gvsv") { | |
1562 | $lop = $kid->first; | |
1563 | } else { | |
1564 | $lop = $kid; | |
1565 | } | |
1566 | $self->{'avoid_local'}{$$lop}++; | |
9d2c6865 | 1567 | $expr = $self->deparse($kid, 6); |
6e90668e SM |
1568 | delete $self->{'avoid_local'}{$$lop}; |
1569 | } else { | |
9d2c6865 | 1570 | $expr = $self->deparse($kid, 6); |
6e90668e SM |
1571 | } |
1572 | push @exprs, $expr; | |
1573 | } | |
9d2c6865 SM |
1574 | if ($local) { |
1575 | return "$local(" . join(", ", @exprs) . ")"; | |
1576 | } else { | |
1577 | return $self->maybe_parens( join(", ", @exprs), $cx, 6); | |
1578 | } | |
6e90668e SM |
1579 | } |
1580 | ||
1581 | sub pp_cond_expr { | |
1582 | my $self = shift; | |
9d2c6865 | 1583 | my($op, $cx) = @_; |
6e90668e SM |
1584 | my $cond = $op->first; |
1585 | my $true = $cond->sibling; | |
1586 | my $false = $true->sibling; | |
9d2c6865 | 1587 | my $cuddle = $self->{'cuddle'}; |
9d2c6865 | 1588 | unless ($cx == 0 and is_scope($true) and is_scope($false)) { |
f5aa8f4e | 1589 | $cond = $self->deparse($cond, 8); |
9d2c6865 SM |
1590 | $true = $self->deparse($true, 8); |
1591 | $false = $self->deparse($false, 8); | |
1592 | return $self->maybe_parens("$cond ? $true : $false", $cx, 8); | |
1593 | } | |
f5aa8f4e | 1594 | $cond = $self->deparse($cond, 1); |
9d2c6865 | 1595 | $true = $self->deparse($true, 0); |
6e90668e SM |
1596 | if ($false->ppaddr eq "pp_lineseq") { # braces w/o scope => elsif |
1597 | my $head = "if ($cond) {\n\t$true\n\b}"; | |
1598 | my @elsifs; | |
1599 | while (!null($false) and $false->ppaddr eq "pp_lineseq") { | |
1600 | my $newop = $false->first->sibling->first; | |
1601 | my $newcond = $newop->first; | |
1602 | my $newtrue = $newcond->sibling; | |
1603 | $false = $newtrue->sibling; # last in chain is OP_AND => no else | |
9d2c6865 SM |
1604 | $newcond = $self->deparse($newcond, 1); |
1605 | $newtrue = $self->deparse($newtrue, 0); | |
6e90668e SM |
1606 | push @elsifs, "elsif ($newcond) {\n\t$newtrue\n\b}"; |
1607 | } | |
1608 | if (!null($false)) { | |
9d2c6865 SM |
1609 | $false = $cuddle . "else {\n\t" . |
1610 | $self->deparse($false, 0) . "\n\b}\cK"; | |
6e90668e | 1611 | } else { |
9d2c6865 | 1612 | $false = "\cK"; |
6e90668e | 1613 | } |
9d2c6865 | 1614 | return $head . join($cuddle, "", @elsifs) . $false; |
6e90668e | 1615 | } |
9d2c6865 SM |
1616 | $false = $self->deparse($false, 0); |
1617 | return "if ($cond) {\n\t$true\n\b}${cuddle}else {\n\t$false\n\b}\cK"; | |
6e90668e SM |
1618 | } |
1619 | ||
1620 | sub pp_leaveloop { | |
1621 | my $self = shift; | |
9d2c6865 | 1622 | my($op, $cx) = @_; |
6e90668e SM |
1623 | my $enter = $op->first; |
1624 | my $kid = $enter->sibling; | |
1625 | local($self->{'curstash'}) = $self->{'curstash'}; | |
1626 | my $head = ""; | |
9d2c6865 | 1627 | my $bare = 0; |
6e90668e SM |
1628 | if ($kid->ppaddr eq "pp_lineseq") { # bare or infinite loop |
1629 | if (is_state $kid->last) { # infinite | |
1630 | $head = "for (;;) "; # shorter than while (1) | |
9d2c6865 SM |
1631 | } else { |
1632 | $bare = 1; | |
6e90668e SM |
1633 | } |
1634 | } elsif ($enter->ppaddr eq "pp_enteriter") { # foreach | |
1635 | my $ary = $enter->first->sibling; # first was pushmark | |
1636 | my $var = $ary->sibling; | |
f5aa8f4e SM |
1637 | if ($enter->flags & OPf_STACKED |
1638 | and not null $ary->first->sibling->sibling) | |
1639 | { | |
d7f5b6da SM |
1640 | $ary = $self->deparse($ary->first->sibling, 9) . " .. " . |
1641 | $self->deparse($ary->first->sibling->sibling, 9); | |
d8d95777 GA |
1642 | } else { |
1643 | $ary = $self->deparse($ary, 1); | |
1644 | } | |
6e90668e | 1645 | if (null $var) { |
f6f9bdb7 | 1646 | if ($enter->flags & OPf_SPECIAL) { # thread special var |
9d2c6865 | 1647 | $var = $self->pp_threadsv($enter, 1); |
f6f9bdb7 | 1648 | } else { # regular my() variable |
9d2c6865 | 1649 | $var = $self->pp_padsv($enter, 1); |
f6f9bdb7 SM |
1650 | if ($self->padname_sv($enter->targ)->IVX == |
1651 | $kid->first->first->sibling->last->cop_seq) | |
1652 | { | |
1653 | # If the scope of this variable closes at the last | |
1654 | # statement of the loop, it must have been | |
1655 | # declared here. | |
1656 | $var = "my " . $var; | |
1657 | } | |
6e90668e SM |
1658 | } |
1659 | } elsif ($var->ppaddr eq "pp_rv2gv") { | |
9d2c6865 | 1660 | $var = $self->pp_rv2sv($var, 1); |
6e90668e | 1661 | } elsif ($var->ppaddr eq "pp_gv") { |
9d2c6865 | 1662 | $var = "\$" . $self->deparse($var, 1); |
6e90668e | 1663 | } |
9d2c6865 | 1664 | $head = "foreach $var ($ary) "; |
6e90668e SM |
1665 | $kid = $kid->first->first->sibling; # skip OP_AND and OP_ITER |
1666 | } elsif ($kid->ppaddr eq "pp_null") { # while/until | |
1667 | $kid = $kid->first; | |
1668 | my $name = {"pp_and" => "while", "pp_or" => "until"} | |
1669 | ->{$kid->ppaddr}; | |
9d2c6865 | 1670 | $head = "$name (" . $self->deparse($kid->first, 1) . ") "; |
6e90668e | 1671 | $kid = $kid->first->sibling; |
9d2c6865 SM |
1672 | } elsif ($kid->ppaddr eq "pp_stub") { # bare and empty |
1673 | return "{;}"; # {} could be a hashref | |
6e90668e SM |
1674 | } |
1675 | # The third-to-last kid is the continue block if the pointer used | |
9d2c6865 SM |
1676 | # by `next BLOCK' points to its first OP, which happens to be the |
1677 | # the op_next of the head of the _previous_ statement. | |
1678 | # Unless it's a bare loop, in which case it's last, since there's | |
1679 | # no unstack or extra nextstate. | |
f5aa8f4e SM |
1680 | # Except if the previous head isn't null but the first kid is |
1681 | # (because it's a nulled out nextstate in a scope), in which | |
1682 | # case the head's next is advanced past the null but the nextop's | |
1683 | # isn't, so we need to try nextop->next. | |
bd0865ec GS |
1684 | my $precont; |
1685 | my $cont = $kid->first; | |
9d2c6865 | 1686 | if ($bare) { |
9d2c6865 SM |
1687 | while (!null($cont->sibling)) { |
1688 | $precont = $cont; | |
1689 | $cont = $cont->sibling; | |
1690 | } | |
1691 | } else { | |
9d2c6865 SM |
1692 | while (!null($cont->sibling->sibling->sibling)) { |
1693 | $precont = $cont; | |
1694 | $cont = $cont->sibling; | |
6e90668e SM |
1695 | } |
1696 | } | |
f5aa8f4e SM |
1697 | if ($precont and $ {$precont->next} == $ {$enter->nextop} |
1698 | || $ {$precont->next} == $ {$enter->nextop->next} ) | |
1699 | { | |
1700 | my $state = $kid->first; | |
1701 | my $cuddle = $self->{'cuddle'}; | |
1702 | my($expr, @exprs); | |
1703 | for (; $$state != $$cont; $state = $state->sibling) { | |
1704 | $expr = ""; | |
1705 | if (is_state $state) { | |
1706 | $expr = $self->deparse($state, 0); | |
1707 | $state = $state->sibling; | |
1708 | last if null $kid; | |
1709 | } | |
1710 | $expr .= $self->deparse($state, 0); | |
1711 | push @exprs, $expr if $expr; | |
1712 | } | |
1713 | $kid = join(";\n", @exprs); | |
1714 | $cont = $cuddle . "continue {\n\t" . | |
1715 | $self->deparse($cont, 0) . "\n\b}\cK"; | |
6e90668e | 1716 | } else { |
9d2c6865 SM |
1717 | $cont = "\cK"; |
1718 | $kid = $self->deparse($kid, 0); | |
6e90668e SM |
1719 | } |
1720 | return $head . "{\n\t" . $kid . "\n\b}" . $cont; | |
1721 | } | |
1722 | ||
1723 | sub pp_leavetry { | |
1724 | my $self = shift; | |
9d2c6865 | 1725 | return "eval {\n\t" . $self->pp_leave(@_) . "\n\b}"; |
bd0865ec | 1726 | } |
6e90668e | 1727 | |
bd0865ec GS |
1728 | BEGIN { eval "sub OP_CONST () {" . opnumber("const") . "}" } |
1729 | BEGIN { eval "sub OP_STRINGIFY () {" . opnumber("stringify") . "}" } | |
f5aa8f4e | 1730 | |
a798dbf2 | 1731 | sub pp_null { |
6e90668e | 1732 | my $self = shift; |
9d2c6865 | 1733 | my($op, $cx) = @_; |
6e90668e | 1734 | if (class($op) eq "OP") { |
bd0865ec | 1735 | return "'???'" if $op->targ == OP_CONST; # old value is lost |
6e90668e | 1736 | } elsif ($op->first->ppaddr eq "pp_pushmark") { |
9d2c6865 | 1737 | return $self->pp_list($op, $cx); |
6e90668e | 1738 | } elsif ($op->first->ppaddr eq "pp_enter") { |
9d2c6865 | 1739 | return $self->pp_leave($op, $cx); |
bd0865ec | 1740 | } elsif ($op->targ == OP_STRINGIFY) { |
6e90668e SM |
1741 | return $self->dquote($op); |
1742 | } elsif (!null($op->first->sibling) and | |
1743 | $op->first->sibling->ppaddr eq "pp_readline" and | |
1744 | $op->first->sibling->flags & OPf_STACKED) { | |
9d2c6865 SM |
1745 | return $self->maybe_parens($self->deparse($op->first, 7) . " = " |
1746 | . $self->deparse($op->first->sibling, 7), | |
1747 | $cx, 7); | |
6e90668e SM |
1748 | } elsif (!null($op->first->sibling) and |
1749 | $op->first->sibling->ppaddr eq "pp_trans" and | |
1750 | $op->first->sibling->flags & OPf_STACKED) { | |
9d2c6865 SM |
1751 | return $self->maybe_parens($self->deparse($op->first, 20) . " =~ " |
1752 | . $self->deparse($op->first->sibling, 20), | |
1753 | $cx, 20); | |
6e90668e | 1754 | } else { |
9d2c6865 | 1755 | return $self->deparse($op->first, $cx); |
6e90668e | 1756 | } |
a798dbf2 MB |
1757 | } |
1758 | ||
bd0865ec GS |
1759 | # the aassign in-common check messes up SvCUR (always setting it |
1760 | # to a value >= 100), but it's probably safe to assume there | |
1761 | # won't be any NULs in the names of my() variables. (with | |
1762 | # stash variables, I wouldn't be so sure) | |
1763 | sub padname_fix { | |
1764 | my $str = shift; | |
1765 | $str = substr($str, 0, index($str, "\0")) if index($str, "\0") != -1; | |
1766 | return $str; | |
1767 | } | |
1768 | ||
6e90668e SM |
1769 | sub padname { |
1770 | my $self = shift; | |
1771 | my $targ = shift; | |
1772 | my $str = $self->padname_sv($targ)->PV; | |
1773 | return padname_fix($str); | |
1774 | } | |
1775 | ||
1776 | sub padany { | |
1777 | my $self = shift; | |
1778 | my $op = shift; | |
1779 | return substr($self->padname($op->targ), 1); # skip $/@/% | |
1780 | } | |
1781 | ||
1782 | sub pp_padsv { | |
1783 | my $self = shift; | |
9d2c6865 SM |
1784 | my($op, $cx) = @_; |
1785 | return $self->maybe_my($op, $cx, $self->padname($op->targ)); | |
6e90668e SM |
1786 | } |
1787 | ||
1788 | sub pp_padav { pp_padsv(@_) } | |
1789 | sub pp_padhv { pp_padsv(@_) } | |
1790 | ||
9d2c6865 SM |
1791 | my @threadsv_names; |
1792 | ||
1793 | BEGIN { | |
1794 | @threadsv_names = ("_", "1", "2", "3", "4", "5", "6", "7", "8", "9", | |
1795 | "&", "`", "'", "+", "/", ".", ",", "\\", '"', ";", | |
1796 | "^", "-", "%", "=", "|", "~", ":", "^A", "^E", | |
1797 | "!", "@"); | |
1798 | } | |
f6f9bdb7 SM |
1799 | |
1800 | sub pp_threadsv { | |
1801 | my $self = shift; | |
9d2c6865 SM |
1802 | my($op, $cx) = @_; |
1803 | return $self->maybe_local($op, $cx, "\$" . $threadsv_names[$op->targ]); | |
f6f9bdb7 SM |
1804 | } |
1805 | ||
6e90668e SM |
1806 | sub pp_gvsv { |
1807 | my $self = shift; | |
9d2c6865 SM |
1808 | my($op, $cx) = @_; |
1809 | return $self->maybe_local($op, $cx, "\$" . $self->gv_name($op->gv)); | |
6e90668e SM |
1810 | } |
1811 | ||
1812 | sub pp_gv { | |
1813 | my $self = shift; | |
9d2c6865 | 1814 | my($op, $cx) = @_; |
6e90668e SM |
1815 | return $self->gv_name($op->gv); |
1816 | } | |
1817 | ||
1818 | sub pp_aelemfast { | |
1819 | my $self = shift; | |
9d2c6865 | 1820 | my($op, $cx) = @_; |
6e90668e SM |
1821 | my $gv = $op->gv; |
1822 | return "\$" . $self->gv_name($gv) . "[" . $op->private . "]"; | |
1823 | } | |
1824 | ||
1825 | sub rv2x { | |
1826 | my $self = shift; | |
9d2c6865 | 1827 | my($op, $cx, $type) = @_; |
6e90668e | 1828 | my $kid = $op->first; |
f5aa8f4e SM |
1829 | my $str = $self->deparse($kid, 0); |
1830 | return $type . (is_scalar($kid) ? $str : "{$str}"); | |
6e90668e SM |
1831 | } |
1832 | ||
1833 | sub pp_rv2sv { maybe_local(@_, rv2x(@_, "\$")) } | |
1834 | sub pp_rv2hv { maybe_local(@_, rv2x(@_, "%")) } | |
1835 | sub pp_rv2gv { maybe_local(@_, rv2x(@_, "*")) } | |
1836 | ||
1837 | # skip rv2av | |
1838 | sub pp_av2arylen { | |
1839 | my $self = shift; | |
9d2c6865 | 1840 | my($op, $cx) = @_; |
6e90668e | 1841 | if ($op->first->ppaddr eq "pp_padav") { |
9d2c6865 | 1842 | return $self->maybe_local($op, $cx, '$#' . $self->padany($op->first)); |
6e90668e | 1843 | } else { |
f5aa8f4e SM |
1844 | return $self->maybe_local($op, $cx, |
1845 | $self->rv2x($op->first, $cx, '$#')); | |
6e90668e SM |
1846 | } |
1847 | } | |
1848 | ||
1849 | # skip down to the old, ex-rv2cv | |
9d2c6865 | 1850 | sub pp_rv2cv { $_[0]->rv2x($_[1]->first->first->sibling, $_[2], "&") } |
6e90668e SM |
1851 | |
1852 | sub pp_rv2av { | |
1853 | my $self = shift; | |
9d2c6865 | 1854 | my($op, $cx) = @_; |
6e90668e SM |
1855 | my $kid = $op->first; |
1856 | if ($kid->ppaddr eq "pp_const") { # constant list | |
1857 | my $av = $kid->sv; | |
1858 | return "(" . join(", ", map(const($_), $av->ARRAY)) . ")"; | |
1859 | } else { | |
9d2c6865 | 1860 | return $self->maybe_local($op, $cx, $self->rv2x($op, $cx, "\@")); |
6e90668e SM |
1861 | } |
1862 | } | |
1863 | ||
1864 | ||
1865 | sub elem { | |
1866 | my $self = shift; | |
9d2c6865 | 1867 | my ($op, $cx, $left, $right, $padname) = @_; |
6e90668e SM |
1868 | my($array, $idx) = ($op->first, $op->first->sibling); |
1869 | unless ($array->ppaddr eq $padname) { # Maybe this has been fixed | |
1870 | $array = $array->first; # skip rv2av (or ex-rv2av in _53+) | |
1871 | } | |
1872 | if ($array->ppaddr eq $padname) { | |
1873 | $array = $self->padany($array); | |
1874 | } elsif (is_scope($array)) { # ${expr}[0] | |
9d2c6865 | 1875 | $array = "{" . $self->deparse($array, 0) . "}"; |
6e90668e | 1876 | } elsif (is_scalar $array) { # $x[0], $$x[0], ... |
9d2c6865 | 1877 | $array = $self->deparse($array, 24); |
6e90668e SM |
1878 | } else { |
1879 | # $x[20][3]{hi} or expr->[20] | |
1880 | my $arrow; | |
1881 | $arrow = "->" if $array->ppaddr !~ /^pp_[ah]elem$/; | |
9d2c6865 SM |
1882 | return $self->deparse($array, 24) . $arrow . |
1883 | $left . $self->deparse($idx, 1) . $right; | |
6e90668e | 1884 | } |
9d2c6865 | 1885 | $idx = $self->deparse($idx, 1); |
6e90668e SM |
1886 | return "\$" . $array . $left . $idx . $right; |
1887 | } | |
1888 | ||
1889 | sub pp_aelem { maybe_local(@_, elem(@_, "[", "]", "pp_padav")) } | |
1890 | sub pp_helem { maybe_local(@_, elem(@_, "{", "}", "pp_padhv")) } | |
1891 | ||
1892 | sub pp_gelem { | |
1893 | my $self = shift; | |
9d2c6865 | 1894 | my($op, $cx) = @_; |
6e90668e SM |
1895 | my($glob, $part) = ($op->first, $op->last); |
1896 | $glob = $glob->first; # skip rv2gv | |
1897 | $glob = $glob->first if $glob->ppaddr eq "pp_rv2gv"; # this one's a bug | |
9d2c6865 SM |
1898 | my $scope = is_scope($glob); |
1899 | $glob = $self->deparse($glob, 0); | |
1900 | $part = $self->deparse($part, 1); | |
6e90668e SM |
1901 | return "*" . ($scope ? "{$glob}" : $glob) . "{$part}"; |
1902 | } | |
1903 | ||
1904 | sub slice { | |
1905 | my $self = shift; | |
9d2c6865 | 1906 | my ($op, $cx, $left, $right, $regname, $padname) = @_; |
6e90668e SM |
1907 | my $last; |
1908 | my(@elems, $kid, $array, $list); | |
1909 | if (class($op) eq "LISTOP") { | |
1910 | $last = $op->last; | |
1911 | } else { # ex-hslice inside delete() | |
1912 | for ($kid = $op->first; !null $kid->sibling; $kid = $kid->sibling) {} | |
1913 | $last = $kid; | |
1914 | } | |
1915 | $array = $last; | |
1916 | $array = $array->first | |
1917 | if $array->ppaddr eq $regname or $array->ppaddr eq "pp_null"; | |
1918 | if (is_scope($array)) { | |
9d2c6865 | 1919 | $array = "{" . $self->deparse($array, 0) . "}"; |
6e90668e SM |
1920 | } elsif ($array->ppaddr eq $padname) { |
1921 | $array = $self->padany($array); | |
1922 | } else { | |
9d2c6865 | 1923 | $array = $self->deparse($array, 24); |
6e90668e SM |
1924 | } |
1925 | $kid = $op->first->sibling; # skip pushmark | |
1926 | if ($kid->ppaddr eq "pp_list") { | |
1927 | $kid = $kid->first->sibling; # skip list, pushmark | |
1928 | for (; !null $kid; $kid = $kid->sibling) { | |
9d2c6865 | 1929 | push @elems, $self->deparse($kid, 6); |
6e90668e SM |
1930 | } |
1931 | $list = join(", ", @elems); | |
1932 | } else { | |
9d2c6865 | 1933 | $list = $self->deparse($kid, 1); |
6e90668e SM |
1934 | } |
1935 | return "\@" . $array . $left . $list . $right; | |
1936 | } | |
1937 | ||
1938 | sub pp_aslice { maybe_local(@_, slice(@_, "[", "]", | |
1939 | "pp_rv2av", "pp_padav")) } | |
1940 | sub pp_hslice { maybe_local(@_, slice(@_, "{", "}", | |
1941 | "pp_rv2hv", "pp_padhv")) } | |
1942 | ||
1943 | sub pp_lslice { | |
1944 | my $self = shift; | |
9d2c6865 | 1945 | my($op, $cx) = @_; |
6e90668e SM |
1946 | my $idx = $op->first; |
1947 | my $list = $op->last; | |
1948 | my(@elems, $kid); | |
9d2c6865 SM |
1949 | $list = $self->deparse($list, 1); |
1950 | $idx = $self->deparse($idx, 1); | |
1951 | return "($list)" . "[$idx]"; | |
6e90668e SM |
1952 | } |
1953 | ||
6e90668e SM |
1954 | sub want_scalar { |
1955 | my $op = shift; | |
1956 | return ($op->flags & OPf_WANT) == OPf_WANT_SCALAR; | |
1957 | } | |
1958 | ||
bd0865ec GS |
1959 | sub want_list { |
1960 | my $op = shift; | |
1961 | return ($op->flags & OPf_WANT) == OPf_WANT_LIST; | |
1962 | } | |
1963 | ||
1964 | sub method { | |
6e90668e | 1965 | my $self = shift; |
9d2c6865 | 1966 | my($op, $cx) = @_; |
bd0865ec GS |
1967 | my $kid = $op->first->sibling; # skip pushmark |
1968 | my($meth, $obj, @exprs); | |
1969 | if ($kid->ppaddr eq "pp_list" and want_list $kid) { | |
1970 | # When an indirect object isn't a bareword but the args are in | |
1971 | # parens, the parens aren't part of the method syntax (the LLAFR | |
1972 | # doesn't apply), but they make a list with OPf_PARENS set that | |
1973 | # doesn't get flattened by the append_elem that adds the method, | |
1974 | # making a (object, arg1, arg2, ...) list where the object | |
1975 | # usually is. This can be distinguished from | |
1976 | # `($obj, $arg1, $arg2)->meth()' (which is legal if $arg2 is an | |
1977 | # object) because in the later the list is in scalar context | |
1978 | # as the left side of -> always is, while in the former | |
1979 | # the list is in list context as method arguments always are. | |
1980 | # (Good thing there aren't method prototypes!) | |
1981 | $meth = $kid->sibling->first; | |
1982 | $kid = $kid->first->sibling; # skip pushmark | |
1983 | $obj = $kid; | |
6e90668e | 1984 | $kid = $kid->sibling; |
bd0865ec | 1985 | for (; not null $kid; $kid = $kid->sibling) { |
9d2c6865 | 1986 | push @exprs, $self->deparse($kid, 6); |
6e90668e | 1987 | } |
bd0865ec GS |
1988 | } else { |
1989 | $obj = $kid; | |
1990 | $kid = $kid->sibling; | |
1991 | for (; not null $kid->sibling; $kid = $kid->sibling) { | |
1992 | push @exprs, $self->deparse($kid, 6); | |
6e90668e | 1993 | } |
bd0865ec GS |
1994 | $meth = $kid->first; |
1995 | } | |
1996 | $obj = $self->deparse($obj, 24); | |
1997 | if ($meth->ppaddr eq "pp_const") { | |
1998 | $meth = $meth->sv->PV; # needs to be bare | |
1999 | } else { | |
2000 | $meth = $self->deparse($meth, 1); | |
2001 | } | |
2002 | my $args = join(", ", @exprs); | |
2003 | $kid = $obj . "->" . $meth; | |
2004 | if ($args) { | |
2005 | return $kid . "(" . $args . ")"; # parens mandatory | |
2006 | } else { | |
2007 | return $kid; | |
2008 | } | |
2009 | } | |
2010 | ||
2011 | # returns "&" if the prototype doesn't match the args, | |
2012 | # or ("", $args_after_prototype_demunging) if it does. | |
2013 | sub check_proto { | |
2014 | my $self = shift; | |
2015 | my($proto, @args) = @_; | |
2016 | my($arg, $real); | |
2017 | my $doneok = 0; | |
2018 | my @reals; | |
2019 | # An unbackslashed @ or % gobbles up the rest of the args | |
2020 | $proto =~ s/([^\\]|^)([@%])(.*)$/$1$2/; | |
2021 | while ($proto) { | |
2022 | $proto =~ s/^ *([\\]?[\$\@&%*]|;)//; | |
2023 | my $chr = $1; | |
2024 | if ($chr eq "") { | |
2025 | return "&" if @args; | |
2026 | } elsif ($chr eq ";") { | |
2027 | $doneok = 1; | |
2028 | } elsif ($chr eq "@" or $chr eq "%") { | |
2029 | push @reals, map($self->deparse($_, 6), @args); | |
2030 | @args = (); | |
6e90668e | 2031 | } else { |
bd0865ec GS |
2032 | $arg = shift @args; |
2033 | last unless $arg; | |
2034 | if ($chr eq "\$") { | |
2035 | if (want_scalar $arg) { | |
2036 | push @reals, $self->deparse($arg, 6); | |
2037 | } else { | |
2038 | return "&"; | |
2039 | } | |
2040 | } elsif ($chr eq "&") { | |
2041 | if ($arg->ppaddr =~ /pp_(s?refgen|undef)/) { | |
2042 | push @reals, $self->deparse($arg, 6); | |
2043 | } else { | |
2044 | return "&"; | |
2045 | } | |
2046 | } elsif ($chr eq "*") { | |
2047 | if ($arg->ppaddr =~ /^pp_s?refgen$/ | |
2048 | and $arg->first->first->ppaddr eq "pp_rv2gv") | |
2049 | { | |
2050 | $real = $arg->first->first; # skip refgen, null | |
2051 | if ($real->first->ppaddr eq "pp_gv") { | |
2052 | push @reals, $self->deparse($real, 6); | |
2053 | } else { | |
2054 | push @reals, $self->deparse($real->first, 6); | |
2055 | } | |
2056 | } else { | |
2057 | return "&"; | |
2058 | } | |
2059 | } elsif (substr($chr, 0, 1) eq "\\") { | |
2060 | $chr = substr($chr, 1); | |
2061 | if ($arg->ppaddr =~ /^pp_s?refgen$/ and | |
2062 | !null($real = $arg->first) and | |
2063 | ($chr eq "\$" && is_scalar($real->first) | |
2064 | or ($chr eq "\@" | |
2065 | && $real->first->sibling->ppaddr | |
2066 | =~ /^pp_(rv2|pad)av$/) | |
2067 | or ($chr eq "%" | |
2068 | && $real->first->sibling->ppaddr | |
2069 | =~ /^pp_(rv2|pad)hv$/) | |
2070 | #or ($chr eq "&" # This doesn't work | |
2071 | # && $real->first->ppaddr eq "pp_rv2cv") | |
2072 | or ($chr eq "*" | |
2073 | && $real->first->ppaddr eq "pp_rv2gv"))) | |
2074 | { | |
2075 | push @reals, $self->deparse($real, 6); | |
2076 | } else { | |
2077 | return "&"; | |
2078 | } | |
2079 | } | |
2080 | } | |
9d2c6865 | 2081 | } |
bd0865ec GS |
2082 | return "&" if $proto and !$doneok; # too few args and no `;' |
2083 | return "&" if @args; # too many args | |
2084 | return ("", join ", ", @reals); | |
2085 | } | |
2086 | ||
2087 | sub pp_entersub { | |
2088 | my $self = shift; | |
2089 | my($op, $cx) = @_; | |
2090 | return $self->method($op, $cx) unless null $op->first->sibling; | |
2091 | my $prefix = ""; | |
2092 | my $amper = ""; | |
2093 | my($kid, @exprs); | |
9d2c6865 SM |
2094 | if ($op->flags & OPf_SPECIAL) { |
2095 | $prefix = "do "; | |
2096 | } elsif ($op->private & OPpENTERSUB_AMPER) { | |
2097 | $amper = "&"; | |
2098 | } | |
2099 | $kid = $op->first; | |
2100 | $kid = $kid->first->sibling; # skip ex-list, pushmark | |
2101 | for (; not null $kid->sibling; $kid = $kid->sibling) { | |
2102 | push @exprs, $kid; | |
2103 | } | |
bd0865ec GS |
2104 | my $simple = 0; |
2105 | my $proto = undef; | |
9d2c6865 SM |
2106 | if (is_scope($kid)) { |
2107 | $amper = "&"; | |
2108 | $kid = "{" . $self->deparse($kid, 0) . "}"; | |
2109 | } elsif ($kid->first->ppaddr eq "pp_gv") { | |
2110 | my $gv = $kid->first->gv; | |
2111 | if (class($gv->CV) ne "SPECIAL") { | |
2112 | $proto = $gv->CV->PV if $gv->CV->FLAGS & SVf_POK; | |
2113 | } | |
bd0865ec | 2114 | $simple = 1; # only calls of named functions can be prototyped |
9d2c6865 SM |
2115 | $kid = $self->deparse($kid, 24); |
2116 | } elsif (is_scalar $kid->first) { | |
2117 | $amper = "&"; | |
2118 | $kid = $self->deparse($kid, 24); | |
2119 | } else { | |
2120 | $prefix = ""; | |
2121 | $kid = $self->deparse($kid, 24) . "->"; | |
2122 | } | |
bd0865ec | 2123 | my $args; |
9d2c6865 | 2124 | if (defined $proto and not $amper) { |
bd0865ec GS |
2125 | ($amper, $args) = $self->check_proto($proto, @exprs); |
2126 | if ($amper eq "&") { | |
9d2c6865 SM |
2127 | $args = join(", ", map($self->deparse($_, 6), @exprs)); |
2128 | } | |
2129 | } else { | |
2130 | $args = join(", ", map($self->deparse($_, 6), @exprs)); | |
6e90668e | 2131 | } |
9d2c6865 SM |
2132 | if ($prefix or $amper) { |
2133 | if ($op->flags & OPf_STACKED) { | |
2134 | return $prefix . $amper . $kid . "(" . $args . ")"; | |
2135 | } else { | |
2136 | return $prefix . $amper. $kid; | |
2137 | } | |
6e90668e | 2138 | } else { |
9d2c6865 SM |
2139 | if (defined $proto and $proto eq "") { |
2140 | return $kid; | |
2141 | } elsif ($proto eq "\$") { | |
2142 | return $self->maybe_parens_func($kid, $args, $cx, 16); | |
2143 | } elsif ($proto or $simple) { | |
2144 | return $self->maybe_parens_func($kid, $args, $cx, 5); | |
2145 | } else { | |
2146 | return "$kid(" . $args . ")"; | |
2147 | } | |
6e90668e SM |
2148 | } |
2149 | } | |
2150 | ||
2151 | sub pp_enterwrite { unop(@_, "write") } | |
2152 | ||
2153 | # escape things that cause interpolation in double quotes, | |
2154 | # but not character escapes | |
2155 | sub uninterp { | |
2156 | my($str) = @_; | |
9d2c6865 SM |
2157 | $str =~ s/(^|[^\\])([\$\@]|\\[uUlLQE])/$1\\$2/g; |
2158 | return $str; | |
2159 | } | |
2160 | ||
2161 | # the same, but treat $|, $), and $ at the end of the string differently | |
2162 | sub re_uninterp { | |
2163 | my($str) = @_; | |
2164 | $str =~ s/(^|[^\\])(\@|\\[uUlLQE])/$1\\$2/g; | |
2165 | $str =~ s/(^|[^\\])(\$[^)|])/$1\\$2/g; | |
6e90668e SM |
2166 | return $str; |
2167 | } | |
2168 | ||
2169 | # character escapes, but not delimiters that might need to be escaped | |
2170 | sub escape_str { # ASCII | |
2171 | my($str) = @_; | |
6e90668e SM |
2172 | $str =~ s/\a/\\a/g; |
2173 | # $str =~ s/\cH/\\b/g; # \b means someting different in a regex | |
2174 | $str =~ s/\t/\\t/g; | |
2175 | $str =~ s/\n/\\n/g; | |
2176 | $str =~ s/\e/\\e/g; | |
2177 | $str =~ s/\f/\\f/g; | |
2178 | $str =~ s/\r/\\r/g; | |
2179 | $str =~ s/([\cA-\cZ])/'\\c' . chr(ord('@') + ord($1))/ge; | |
2180 | $str =~ s/([\0\033-\037\177-\377])/'\\' . sprintf("%03o", ord($1))/ge; | |
2181 | return $str; | |
2182 | } | |
2183 | ||
9d2c6865 SM |
2184 | # Don't do this for regexen |
2185 | sub unback { | |
2186 | my($str) = @_; | |
2187 | $str =~ s/\\/\\\\/g; | |
2188 | return $str; | |
2189 | } | |
2190 | ||
6e90668e SM |
2191 | sub balanced_delim { |
2192 | my($str) = @_; | |
2193 | my @str = split //, $str; | |
2194 | my($ar, $open, $close, $fail, $c, $cnt); | |
2195 | for $ar (['[',']'], ['(',')'], ['<','>'], ['{','}']) { | |
2196 | ($open, $close) = @$ar; | |
2197 | $fail = 0; $cnt = 0; | |
2198 | for $c (@str) { | |
2199 | if ($c eq $open) { | |
2200 | $cnt++; | |
2201 | } elsif ($c eq $close) { | |
2202 | $cnt--; | |
2203 | if ($cnt < 0) { | |
bd0865ec | 2204 | # qq()() isn't ")(" |
6e90668e SM |
2205 | $fail = 1; |
2206 | last; | |
2207 | } | |
2208 | } | |
2209 | } | |
2210 | $fail = 1 if $cnt != 0; | |
2211 | return ($open, "$open$str$close") if not $fail; | |
2212 | } | |
2213 | return ("", $str); | |
2214 | } | |
2215 | ||
2216 | sub single_delim { | |
2217 | my($q, $default, $str) = @_; | |
90be192f | 2218 | return "$default$str$default" if $default and index($str, $default) == -1; |
6e90668e SM |
2219 | my($succeed, $delim); |
2220 | ($succeed, $str) = balanced_delim($str); | |
2221 | return "$q$str" if $succeed; | |
2222 | for $delim ('/', '"', '#') { | |
2223 | return "$q$delim" . $str . $delim if index($str, $delim) == -1; | |
2224 | } | |
90be192f SM |
2225 | if ($default) { |
2226 | $str =~ s/$default/\\$default/g; | |
2227 | return "$default$str$default"; | |
2228 | } else { | |
2229 | $str =~ s[/][\\/]g; | |
2230 | return "$q/$str/"; | |
2231 | } | |
6e90668e SM |
2232 | } |
2233 | ||
6e90668e SM |
2234 | sub const { |
2235 | my $sv = shift; | |
2236 | if (class($sv) eq "SPECIAL") { | |
bd0865ec | 2237 | return ('undef', '1', '0')[$$sv-1]; # sv_undef, sv_yes, sv_no |
6e90668e | 2238 | } elsif ($sv->FLAGS & SVf_IOK) { |
a798dbf2 | 2239 | return $sv->IV; |
6e90668e | 2240 | } elsif ($sv->FLAGS & SVf_NOK) { |
a798dbf2 | 2241 | return $sv->NV; |
6e90668e SM |
2242 | } elsif ($sv->FLAGS & SVf_ROK) { |
2243 | return "\\(" . const($sv->RV) . ")"; # constant folded | |
a798dbf2 | 2244 | } else { |
6e90668e | 2245 | my $str = $sv->PV; |
bd0865ec | 2246 | if ($str =~ /[^ -~]/) { # ASCII for non-printing |
9d2c6865 | 2247 | return single_delim("qq", '"', uninterp escape_str unback $str); |
6e90668e | 2248 | } else { |
bd0865ec | 2249 | return single_delim("q", "'", unback $str); |
6e90668e | 2250 | } |
a798dbf2 MB |
2251 | } |
2252 | } | |
2253 | ||
6e90668e SM |
2254 | sub pp_const { |
2255 | my $self = shift; | |
9d2c6865 | 2256 | my($op, $cx) = @_; |
4c1f658f | 2257 | # if ($op->private & OPpCONST_BARE) { # trouble with `=>' autoquoting |
6e90668e SM |
2258 | # return $op->sv->PV; |
2259 | # } | |
2260 | return const($op->sv); | |
2261 | } | |
2262 | ||
2263 | sub dq { | |
2264 | my $self = shift; | |
2265 | my $op = shift; | |
2266 | my $type = $op->ppaddr; | |
2267 | if ($type eq "pp_const") { | |
9d2c6865 | 2268 | return uninterp(escape_str(unback($op->sv->PV))); |
6e90668e SM |
2269 | } elsif ($type eq "pp_concat") { |
2270 | return $self->dq($op->first) . $self->dq($op->last); | |
2271 | } elsif ($type eq "pp_uc") { | |
2272 | return '\U' . $self->dq($op->first->sibling) . '\E'; | |
2273 | } elsif ($type eq "pp_lc") { | |
2274 | return '\L' . $self->dq($op->first->sibling) . '\E'; | |
2275 | } elsif ($type eq "pp_ucfirst") { | |
2276 | return '\u' . $self->dq($op->first->sibling); | |
2277 | } elsif ($type eq "pp_lcfirst") { | |
2278 | return '\l' . $self->dq($op->first->sibling); | |
2279 | } elsif ($type eq "pp_quotemeta") { | |
2280 | return '\Q' . $self->dq($op->first->sibling) . '\E'; | |
2281 | } elsif ($type eq "pp_join") { | |
9d2c6865 | 2282 | return $self->deparse($op->last, 26); # was join($", @ary) |
a798dbf2 | 2283 | } else { |
9d2c6865 | 2284 | return $self->deparse($op, 26); |
6e90668e SM |
2285 | } |
2286 | } | |
2287 | ||
2288 | sub pp_backtick { | |
2289 | my $self = shift; | |
9d2c6865 | 2290 | my($op, $cx) = @_; |
6e90668e SM |
2291 | # skip pushmark |
2292 | return single_delim("qx", '`', $self->dq($op->first->sibling)); | |
2293 | } | |
2294 | ||
2295 | sub dquote { | |
2296 | my $self = shift; | |
bd0865ec GS |
2297 | my($op, $cx) = shift; |
2298 | return $self->deparse($op->first->sibling, $cx) if $self->{'unquote'}; | |
6e90668e SM |
2299 | # skip ex-stringify, pushmark |
2300 | return single_delim("qq", '"', $self->dq($op->first->sibling)); | |
2301 | } | |
2302 | ||
bd0865ec | 2303 | # OP_STRINGIFY is a listop, but it only ever has one arg |
6e90668e SM |
2304 | sub pp_stringify { dquote(@_) } |
2305 | ||
2306 | # tr/// and s/// (and tr[][], tr[]//, tr###, etc) | |
2307 | # note that tr(from)/to/ is OK, but not tr/from/(to) | |
2308 | sub double_delim { | |
2309 | my($from, $to) = @_; | |
2310 | my($succeed, $delim); | |
2311 | if ($from !~ m[/] and $to !~ m[/]) { | |
2312 | return "/$from/$to/"; | |
2313 | } elsif (($succeed, $from) = balanced_delim($from) and $succeed) { | |
2314 | if (($succeed, $to) = balanced_delim($to) and $succeed) { | |
2315 | return "$from$to"; | |
2316 | } else { | |
2317 | for $delim ('/', '"', '#') { # note no `'' -- s''' is special | |
2318 | return "$from$delim$to$delim" if index($to, $delim) == -1; | |
2319 | } | |
2320 | $to =~ s[/][\\/]g; | |
2321 | return "$from/$to/"; | |
2322 | } | |
2323 | } else { | |
2324 | for $delim ('/', '"', '#') { # note no ' | |
2325 | return "$delim$from$delim$to$delim" | |
2326 | if index($to . $from, $delim) == -1; | |
2327 | } | |
2328 | $from =~ s[/][\\/]g; | |
2329 | $to =~ s[/][\\/]g; | |
2330 | return "/$from/$to/"; | |
2331 | } | |
2332 | } | |
2333 | ||
2334 | sub pchr { # ASCII | |
2335 | my($n) = @_; | |
2336 | if ($n == ord '\\') { | |
2337 | return '\\\\'; | |
2338 | } elsif ($n >= ord(' ') and $n <= ord('~')) { | |
2339 | return chr($n); | |
2340 | } elsif ($n == ord "\a") { | |
2341 | return '\\a'; | |
2342 | } elsif ($n == ord "\b") { | |
2343 | return '\\b'; | |
2344 | } elsif ($n == ord "\t") { | |
2345 | return '\\t'; | |
2346 | } elsif ($n == ord "\n") { | |
2347 | return '\\n'; | |
2348 | } elsif ($n == ord "\e") { | |
2349 | return '\\e'; | |
2350 | } elsif ($n == ord "\f") { | |
2351 | return '\\f'; | |
2352 | } elsif ($n == ord "\r") { | |
2353 | return '\\r'; | |
2354 | } elsif ($n >= ord("\cA") and $n <= ord("\cZ")) { | |
2355 | return '\\c' . chr(ord("@") + $n); | |
2356 | } else { | |
2357 | # return '\x' . sprintf("%02x", $n); | |
2358 | return '\\' . sprintf("%03o", $n); | |
2359 | } | |
2360 | } | |
2361 | ||
2362 | sub collapse { | |
2363 | my(@chars) = @_; | |
2364 | my($c, $str, $tr); | |
2365 | for ($c = 0; $c < @chars; $c++) { | |
2366 | $tr = $chars[$c]; | |
2367 | $str .= pchr($tr); | |
2368 | if ($c <= $#chars - 2 and $chars[$c + 1] == $tr + 1 and | |
2369 | $chars[$c + 2] == $tr + 2) | |
2370 | { | |
2371 | for (; $c <= $#chars and $chars[$c + 1] == $chars[$c] + 1; $c++) {} | |
2372 | $str .= "-"; | |
2373 | $str .= pchr($chars[$c]); | |
2374 | } | |
2375 | } | |
2376 | return $str; | |
2377 | } | |
2378 | ||
6e90668e SM |
2379 | sub pp_trans { |
2380 | my $self = shift; | |
9d2c6865 | 2381 | my($op, $cx) = @_; |
6e90668e SM |
2382 | my(@table) = unpack("s256", $op->pv); |
2383 | my($c, $tr, @from, @to, @delfrom, $delhyphen); | |
2384 | if ($table[ord "-"] != -1 and | |
2385 | $table[ord("-") - 1] == -1 || $table[ord("-") + 1] == -1) | |
2386 | { | |
2387 | $tr = $table[ord "-"]; | |
2388 | $table[ord "-"] = -1; | |
2389 | if ($tr >= 0) { | |
2390 | @from = ord("-"); | |
2391 | @to = $tr; | |
2392 | } else { # -2 ==> delete | |
2393 | $delhyphen = 1; | |
2394 | } | |
2395 | } | |
2396 | for ($c = 0; $c < 256; $c++) { | |
2397 | $tr = $table[$c]; | |
2398 | if ($tr >= 0) { | |
2399 | push @from, $c; push @to, $tr; | |
2400 | } elsif ($tr == -2) { | |
2401 | push @delfrom, $c; | |
2402 | } | |
2403 | } | |
2404 | my $flags; | |
2405 | @from = (@from, @delfrom); | |
2406 | if ($op->private & OPpTRANS_COMPLEMENT) { | |
2407 | $flags .= "c"; | |
2408 | my @newfrom = (); | |
2409 | my %from; | |
2410 | @from{@from} = (1) x @from; | |
2411 | for ($c = 0; $c < 256; $c++) { | |
2412 | push @newfrom, $c unless $from{$c}; | |
2413 | } | |
2414 | @from = @newfrom; | |
2415 | } | |
2416 | if ($op->private & OPpTRANS_DELETE) { | |
2417 | $flags .= "d"; | |
2418 | } else { | |
2419 | pop @to while $#to and $to[$#to] == $to[$#to -1]; | |
2420 | } | |
2421 | $flags .= "s" if $op->private & OPpTRANS_SQUASH; | |
2422 | my($from, $to); | |
2423 | $from = collapse(@from); | |
2424 | $to = collapse(@to); | |
2425 | $from .= "-" if $delhyphen; | |
2426 | return "tr" . double_delim($from, $to) . $flags; | |
2427 | } | |
2428 | ||
2429 | # Like dq(), but different | |
2430 | sub re_dq { | |
2431 | my $self = shift; | |
2432 | my $op = shift; | |
2433 | my $type = $op->ppaddr; | |
2434 | if ($type eq "pp_const") { | |
2435 | return uninterp($op->sv->PV); | |
2436 | } elsif ($type eq "pp_concat") { | |
2437 | return $self->re_dq($op->first) . $self->re_dq($op->last); | |
2438 | } elsif ($type eq "pp_uc") { | |
2439 | return '\U' . $self->re_dq($op->first->sibling) . '\E'; | |
2440 | } elsif ($type eq "pp_lc") { | |
2441 | return '\L' . $self->re_dq($op->first->sibling) . '\E'; | |
2442 | } elsif ($type eq "pp_ucfirst") { | |
2443 | return '\u' . $self->re_dq($op->first->sibling); | |
2444 | } elsif ($type eq "pp_lcfirst") { | |
2445 | return '\l' . $self->re_dq($op->first->sibling); | |
2446 | } elsif ($type eq "pp_quotemeta") { | |
2447 | return '\Q' . $self->re_dq($op->first->sibling) . '\E'; | |
2448 | } elsif ($type eq "pp_join") { | |
9d2c6865 | 2449 | return $self->deparse($op->last, 26); # was join($", @ary) |
6e90668e | 2450 | } else { |
9d2c6865 | 2451 | return $self->deparse($op, 26); |
6e90668e SM |
2452 | } |
2453 | } | |
2454 | ||
2455 | sub pp_regcomp { | |
2456 | my $self = shift; | |
9d2c6865 | 2457 | my($op, $cx) = @_; |
6e90668e SM |
2458 | my $kid = $op->first; |
2459 | $kid = $kid->first if $kid->ppaddr eq "pp_regcmaybe"; | |
90be192f | 2460 | $kid = $kid->first if $kid->ppaddr eq "pp_regcreset"; |
6e90668e SM |
2461 | return $self->re_dq($kid); |
2462 | } | |
2463 | ||
6e90668e SM |
2464 | # osmic acid -- see osmium tetroxide |
2465 | ||
2466 | my %matchwords; | |
2467 | map($matchwords{join "", sort split //, $_} = $_, 'cig', 'cog', 'cos', 'cogs', | |
2468 | 'cox', 'go', 'is', 'ism', 'iso', 'mig', 'mix', 'osmic', 'ox', 'sic', | |
2469 | 'sig', 'six', 'smog', 'so', 'soc', 'sog', 'xi'); | |
2470 | ||
90be192f | 2471 | sub matchop { |
6e90668e | 2472 | my $self = shift; |
90be192f | 2473 | my($op, $cx, $name, $delim) = @_; |
6e90668e | 2474 | my $kid = $op->first; |
9d2c6865 | 2475 | my ($binop, $var, $re) = ("", "", ""); |
6e90668e | 2476 | if ($op->flags & OPf_STACKED) { |
9d2c6865 SM |
2477 | $binop = 1; |
2478 | $var = $self->deparse($kid, 20); | |
6e90668e SM |
2479 | $kid = $kid->sibling; |
2480 | } | |
2481 | if (null $kid) { | |
9d2c6865 | 2482 | $re = re_uninterp(escape_str($op->precomp)); |
6e90668e | 2483 | } else { |
9d2c6865 | 2484 | $re = $self->deparse($kid, 1); |
6e90668e SM |
2485 | } |
2486 | my $flags = ""; | |
2487 | $flags .= "c" if $op->pmflags & PMf_CONTINUE; | |
2488 | $flags .= "g" if $op->pmflags & PMf_GLOBAL; | |
2489 | $flags .= "i" if $op->pmflags & PMf_FOLD; | |
2490 | $flags .= "m" if $op->pmflags & PMf_MULTILINE; | |
2491 | $flags .= "o" if $op->pmflags & PMf_KEEP; | |
2492 | $flags .= "s" if $op->pmflags & PMf_SINGLELINE; | |
2493 | $flags .= "x" if $op->pmflags & PMf_EXTENDED; | |
2494 | $flags = $matchwords{$flags} if $matchwords{$flags}; | |
2495 | if ($op->pmflags & PMf_ONCE) { # only one kind of delimiter works here | |
2496 | $re =~ s/\?/\\?/g; | |
9d2c6865 SM |
2497 | $re = "?$re?"; |
2498 | } else { | |
90be192f | 2499 | $re = single_delim($name, $delim, $re); |
9d2c6865 SM |
2500 | } |
2501 | $re = $re . $flags; | |
2502 | if ($binop) { | |
2503 | return $self->maybe_parens("$var =~ $re", $cx, 20); | |
2504 | } else { | |
2505 | return $re; | |
6e90668e | 2506 | } |
6e90668e SM |
2507 | } |
2508 | ||
90be192f SM |
2509 | sub pp_match { matchop(@_, "m", "/") } |
2510 | sub pp_pushre { matchop(@_, "m", "/") } | |
2511 | sub pp_qr { matchop(@_, "qr", "") } | |
6e90668e SM |
2512 | |
2513 | sub pp_split { | |
2514 | my $self = shift; | |
9d2c6865 | 2515 | my($op, $cx) = @_; |
6e90668e SM |
2516 | my($kid, @exprs, $ary, $expr); |
2517 | $kid = $op->first; | |
2518 | if ($ {$kid->pmreplroot}) { | |
2519 | $ary = '@' . $self->gv_name($kid->pmreplroot); | |
2520 | } | |
2521 | for (; !null($kid); $kid = $kid->sibling) { | |
9d2c6865 | 2522 | push @exprs, $self->deparse($kid, 6); |
6e90668e SM |
2523 | } |
2524 | $expr = "split(" . join(", ", @exprs) . ")"; | |
2525 | if ($ary) { | |
9d2c6865 | 2526 | return $self->maybe_parens("$ary = $expr", $cx, 7); |
6e90668e SM |
2527 | } else { |
2528 | return $expr; | |
2529 | } | |
2530 | } | |
2531 | ||
2532 | # oxime -- any of various compounds obtained chiefly by the action of | |
2533 | # hydroxylamine on aldehydes and ketones and characterized by the | |
2534 | # bivalent grouping C=NOH [Webster's Tenth] | |
2535 | ||
2536 | my %substwords; | |
2537 | map($substwords{join "", sort split //, $_} = $_, 'ego', 'egoism', 'em', | |
2538 | 'es', 'ex', 'exes', 'gee', 'go', 'goes', 'ie', 'ism', 'iso', 'me', | |
2539 | 'meese', 'meso', 'mig', 'mix', 'os', 'ox', 'oxime', 'see', 'seem', | |
2540 | 'seg', 'sex', 'sig', 'six', 'smog', 'sog', 'some', 'xi'); | |
2541 | ||
2542 | sub pp_subst { | |
2543 | my $self = shift; | |
9d2c6865 | 2544 | my($op, $cx) = @_; |
6e90668e | 2545 | my $kid = $op->first; |
9d2c6865 | 2546 | my($binop, $var, $re, $repl) = ("", "", "", ""); |
6e90668e | 2547 | if ($op->flags & OPf_STACKED) { |
9d2c6865 SM |
2548 | $binop = 1; |
2549 | $var = $self->deparse($kid, 20); | |
6e90668e SM |
2550 | $kid = $kid->sibling; |
2551 | } | |
2552 | my $flags = ""; | |
2553 | if (null($op->pmreplroot)) { | |
2554 | $repl = $self->dq($kid); | |
2555 | $kid = $kid->sibling; | |
2556 | } else { | |
2557 | $repl = $op->pmreplroot->first; # skip substcont | |
2558 | while ($repl->ppaddr eq "pp_entereval") { | |
2559 | $repl = $repl->first; | |
2560 | $flags .= "e"; | |
2561 | } | |
bd0865ec GS |
2562 | if ($op->pmflags & PMf_EVAL) { |
2563 | $repl = $self->deparse($repl, 0); | |
2564 | } else { | |
2565 | $repl = $self->dq($repl); | |
2566 | } | |
6e90668e SM |
2567 | } |
2568 | if (null $kid) { | |
9d2c6865 | 2569 | $re = re_uninterp(escape_str($op->precomp)); |
6e90668e | 2570 | } else { |
9d2c6865 | 2571 | $re = $self->deparse($kid, 1); |
a798dbf2 | 2572 | } |
6e90668e SM |
2573 | $flags .= "e" if $op->pmflags & PMf_EVAL; |
2574 | $flags .= "g" if $op->pmflags & PMf_GLOBAL; | |
2575 | $flags .= "i" if $op->pmflags & PMf_FOLD; | |
2576 | $flags .= "m" if $op->pmflags & PMf_MULTILINE; | |
2577 | $flags .= "o" if $op->pmflags & PMf_KEEP; | |
2578 | $flags .= "s" if $op->pmflags & PMf_SINGLELINE; | |
2579 | $flags .= "x" if $op->pmflags & PMf_EXTENDED; | |
2580 | $flags = $substwords{$flags} if $substwords{$flags}; | |
9d2c6865 SM |
2581 | if ($binop) { |
2582 | return $self->maybe_parens("$var =~ s" | |
2583 | . double_delim($re, $repl) . $flags, | |
2584 | $cx, 20); | |
2585 | } else { | |
2586 | return "s". double_delim($re, $repl) . $flags; | |
2587 | } | |
a798dbf2 MB |
2588 | } |
2589 | ||
2590 | 1; | |
f6f9bdb7 SM |
2591 | __END__ |
2592 | ||
2593 | =head1 NAME | |
2594 | ||
2595 | B::Deparse - Perl compiler backend to produce perl code | |
2596 | ||
2597 | =head1 SYNOPSIS | |
2598 | ||
f5aa8f4e | 2599 | B<perl> B<-MO=Deparse>[B<,-u>I<PACKAGE>][B<,-p>][B<,-l>][B<,-s>I<LETTERS>] I<prog.pl> |
f6f9bdb7 SM |
2600 | |
2601 | =head1 DESCRIPTION | |
2602 | ||
2603 | B::Deparse is a backend module for the Perl compiler that generates | |
2604 | perl source code, based on the internal compiled structure that perl | |
2605 | itself creates after parsing a program. The output of B::Deparse won't | |
2606 | be exactly the same as the original source, since perl doesn't keep | |
2607 | track of comments or whitespace, and there isn't a one-to-one | |
2608 | correspondence between perl's syntactical constructions and their | |
9d2c6865 SM |
2609 | compiled form, but it will often be close. When you use the B<-p> |
2610 | option, the output also includes parentheses even when they are not | |
2611 | required by precedence, which can make it easy to see if perl is | |
2612 | parsing your expressions the way you intended. | |
f6f9bdb7 SM |
2613 | |
2614 | Please note that this module is mainly new and untested code and is | |
2615 | still under development, so it may change in the future. | |
2616 | ||
2617 | =head1 OPTIONS | |
2618 | ||
9d2c6865 SM |
2619 | As with all compiler backend options, these must follow directly after |
2620 | the '-MO=Deparse', separated by a comma but not any white space. | |
f6f9bdb7 SM |
2621 | |
2622 | =over 4 | |
2623 | ||
bd0865ec GS |
2624 | =item B<-l> |
2625 | ||
2626 | Add '#line' declarations to the output based on the line and file | |
2627 | locations of the original code. | |
2628 | ||
9d2c6865 SM |
2629 | =item B<-p> |
2630 | ||
2631 | Print extra parentheses. Without this option, B::Deparse includes | |
2632 | parentheses in its output only when they are needed, based on the | |
2633 | structure of your program. With B<-p>, it uses parentheses (almost) | |
2634 | whenever they would be legal. This can be useful if you are used to | |
2635 | LISP, or if you want to see how perl parses your input. If you say | |
2636 | ||
2637 | if ($var & 0x7f == 65) {print "Gimme an A!"} | |
2638 | print ($which ? $a : $b), "\n"; | |
2639 | $name = $ENV{USER} or "Bob"; | |
2640 | ||
2641 | C<B::Deparse,-p> will print | |
2642 | ||
2643 | if (($var & 0)) { | |
2644 | print('Gimme an A!') | |
2645 | }; | |
2646 | (print(($which ? $a : $b)), '???'); | |
2647 | (($name = $ENV{'USER'}) or '???') | |
2648 | ||
2649 | which probably isn't what you intended (the C<'???'> is a sign that | |
2650 | perl optimized away a constant value). | |
2651 | ||
bd0865ec GS |
2652 | =item B<-q> |
2653 | ||
2654 | Expand double-quoted strings into the corresponding combinations of | |
2655 | concatenation, uc, ucfirst, lc, lcfirst, quotemeta, and join. For | |
2656 | instance, print | |
2657 | ||
2658 | print "Hello, $world, @ladies, \u$gentlemen\E, \u\L$me!"; | |
2659 | ||
2660 | as | |
2661 | ||
2662 | print 'Hello, ' . $world . ', ' . join($", @ladies) . ', ' | |
2663 | . ucfirst($gentlemen) . ', ' . ucfirst(lc $me . '!'); | |
2664 | ||
2665 | Note that the expanded form represents the way perl handles such | |
2666 | constructions internally -- this option actually turns off the reverse | |
2667 | translation that B::Deparse usually does. On the other hand, note that | |
2668 | C<$x = "$y"> is not the same as C<$x = $y>: the former makes the value | |
2669 | of $y into a string before doing the assignment. | |
2670 | ||
9d2c6865 | 2671 | =item B<-u>I<PACKAGE> |
f6f9bdb7 SM |
2672 | |
2673 | Normally, B::Deparse deparses the main code of a program, all the subs | |
2674 | called by the main program (and all the subs called by them, | |
2675 | recursively), and any other subs in the main:: package. To include | |
2676 | subs in other packages that aren't called directly, such as AUTOLOAD, | |
2677 | DESTROY, other subs called automatically by perl, and methods, which | |
2678 | aren't resolved to subs until runtime, use the B<-u> option. The | |
2679 | argument to B<-u> is the name of a package, and should follow directly | |
2680 | after the 'u'. Multiple B<-u> options may be given, separated by | |
2681 | commas. Note that unlike some other backends, B::Deparse doesn't | |
2682 | (yet) try to guess automatically when B<-u> is needed -- you must | |
2683 | invoke it yourself. | |
2684 | ||
9d2c6865 SM |
2685 | =item B<-s>I<LETTERS> |
2686 | ||
2687 | Tweak the style of B::Deparse's output. At the moment, only one style | |
2688 | option is implemented: | |
2689 | ||
2690 | =over 4 | |
2691 | ||
2692 | =item B<C> | |
2693 | ||
2694 | Cuddle C<elsif>, C<else>, and C<continue> blocks. For example, print | |
2695 | ||
2696 | if (...) { | |
2697 | ... | |
2698 | } else { | |
2699 | ... | |
2700 | } | |
2701 | ||
2702 | instead of | |
2703 | ||
2704 | if (...) { | |
2705 | ... | |
2706 | } | |
2707 | else { | |
2708 | ... | |
2709 | } | |
2710 | ||
2711 | The default is not to cuddle. | |
2712 | ||
2713 | =back | |
2714 | ||
f6f9bdb7 SM |
2715 | =back |
2716 | ||
2717 | =head1 BUGS | |
2718 | ||
2719 | See the 'to do' list at the beginning of the module file. | |
2720 | ||
2721 | =head1 AUTHOR | |
2722 | ||
bd0865ec GS |
2723 | Stephen McCamant <smccam@uclink4.berkeley.edu>, based on an earlier |
2724 | version by Malcolm Beattie <mbeattie@sable.ox.ac.uk>. | |
f6f9bdb7 SM |
2725 | |
2726 | =cut |