Commit | Line | Data |
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6e90668e | 1 | # B::Deparse.pm |
3ed82cfc | 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; |
f4a44678 | 10 | use Carp 'cluck', 'croak'; |
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 | |
3ed82cfc | 15 | OPpTRANS_SQUASH OPpTRANS_DELETE OPpTRANS_COMPLEMENT OPpTARGET_MY |
bd0865ec GS |
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); | |
3ed82cfc | 19 | $VERSION = 0.59; |
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 | |
f4a44678 SM |
69 | # Changes after 0.57: |
70 | # - added parens in \&foo (patch by Albert Dvornik) | |
71 | # Changes between 0.57 and 0.58: | |
72 | # - fixed `0' statements that weren't being printed | |
73 | # - added methods for use from other programs | |
74 | # (based on patches from James Duncan and Hugo van der Sanden) | |
75 | # - added -si and -sT to control indenting (also based on a patch from Hugo) | |
76 | # - added -sv to print something else instead of '???' | |
77 | # - preliminary version of utf8 tr/// handling | |
3ed82cfc GS |
78 | # Changes after 0.58: |
79 | # - uses of $op->ppaddr changed to new $op->name (done by Sarathy) | |
80 | # - added support for Hugo's new OP_SETSTATE (like nextstate) | |
81 | # Changes between 0.58 and 0.59 | |
82 | # - added support for Chip's OP_METHOD_NAMED | |
83 | # - added support for Ilya's OPpTARGET_MY optimization | |
84 | # - elided arrows before `()' subscripts when possible | |
6e90668e SM |
85 | |
86 | # Todo: | |
f4a44678 SM |
87 | # - finish tr/// changes |
88 | # - add option for even more parens (generalize \&foo change) | |
9d2c6865 | 89 | # - {} around variables in strings ("${var}letters") |
f5aa8f4e SM |
90 | # base/lex.t 25-27 |
91 | # comp/term.t 11 | |
90be192f | 92 | # - left/right context |
bd0865ec | 93 | # - recognize `use utf8', `use integer', etc |
f4a44678 SM |
94 | # - treat top-level block specially for incremental output |
95 | # - interpret in high bit chars in string as utf8 \x{...} (when?) | |
3ed82cfc | 96 | # - copy comments (look at real text with $^P?) |
f5aa8f4e | 97 | # - avoid semis in one-statement blocks |
9d2c6865 | 98 | # - associativity of &&=, ||=, ?: |
6e90668e SM |
99 | # - ',' => '=>' (auto-unquote?) |
100 | # - break long lines ("\r" as discretionary break?) | |
f4a44678 SM |
101 | # - configurable syntax highlighting: ANSI color, HTML, TeX, etc. |
102 | # - more style options: brace style, hex vs. octal, quotes, ... | |
103 | # - print big ints as hex/octal instead of decimal (heuristic?) | |
3ed82cfc | 104 | # - handle `my $x if 0'? |
f5aa8f4e SM |
105 | # - include values of variables (e.g. set in BEGIN) |
106 | # - coordinate with Data::Dumper (both directions? see previous) | |
6e90668e SM |
107 | # - version using op_next instead of op_first/sibling? |
108 | # - avoid string copies (pass arrays, one big join?) | |
109 | # - auto-apply `-u'? | |
9d2c6865 SM |
110 | # - while{} with one-statement continue => for(; XXX; XXX) {}? |
111 | # - -uPackage:: descend recursively? | |
112 | # - here-docs? | |
113 | # - <DATA>? | |
6e90668e | 114 | |
f5aa8f4e SM |
115 | # Tests that will always fail: |
116 | # comp/redef.t -- all (redefinition happens at compile time) | |
117 | ||
6e90668e SM |
118 | # Object fields (were globals): |
119 | # | |
120 | # avoid_local: | |
121 | # (local($a), local($b)) and local($a, $b) have the same internal | |
122 | # representation but the short form looks better. We notice we can | |
123 | # use a large-scale local when checking the list, but need to prevent | |
124 | # individual locals too. This hash holds the addresses of OPs that | |
125 | # have already had their local-ness accounted for. The same thing | |
126 | # is done with my(). | |
127 | # | |
128 | # curcv: | |
129 | # CV for current sub (or main program) being deparsed | |
130 | # | |
131 | # curstash: | |
132 | # name of the current package for deparsed code | |
133 | # | |
134 | # subs_todo: | |
135 | # array of [cop_seq, GV, is_format?] for subs and formats we still | |
136 | # want to deparse | |
137 | # | |
f5aa8f4e SM |
138 | # protos_todo: |
139 | # as above, but [name, prototype] for subs that never got a GV | |
140 | # | |
6e90668e SM |
141 | # subs_done, forms_done: |
142 | # keys are addresses of GVs for subs and formats we've already | |
143 | # deparsed (or at least put into subs_todo) | |
9d2c6865 SM |
144 | # |
145 | # parens: -p | |
f5aa8f4e | 146 | # linenums: -l |
bd0865ec | 147 | # unquote: -q |
9d2c6865 | 148 | # cuddle: ` ' or `\n', depending on -sC |
f4a44678 SM |
149 | # indent_size: -si |
150 | # use_tabs: -sT | |
151 | # ex_const: -sv | |
9d2c6865 SM |
152 | |
153 | # A little explanation of how precedence contexts and associativity | |
154 | # work: | |
155 | # | |
156 | # deparse() calls each per-op subroutine with an argument $cx (short | |
157 | # for context, but not the same as the cx* in the perl core), which is | |
158 | # a number describing the op's parents in terms of precedence, whether | |
f5aa8f4e | 159 | # they're inside an expression or at statement level, etc. (see |
9d2c6865 SM |
160 | # chart below). When ops with children call deparse on them, they pass |
161 | # along their precedence. Fractional values are used to implement | |
162 | # associativity (`($x + $y) + $z' => `$x + $y + $y') and related | |
163 | # parentheses hacks. The major disadvantage of this scheme is that | |
164 | # it doesn't know about right sides and left sides, so say if you | |
165 | # assign a listop to a variable, it can't tell it's allowed to leave | |
166 | # the parens off the listop. | |
167 | ||
168 | # Precedences: | |
169 | # 26 [TODO] inside interpolation context ("") | |
170 | # 25 left terms and list operators (leftward) | |
171 | # 24 left -> | |
172 | # 23 nonassoc ++ -- | |
173 | # 22 right ** | |
174 | # 21 right ! ~ \ and unary + and - | |
175 | # 20 left =~ !~ | |
176 | # 19 left * / % x | |
177 | # 18 left + - . | |
178 | # 17 left << >> | |
179 | # 16 nonassoc named unary operators | |
180 | # 15 nonassoc < > <= >= lt gt le ge | |
181 | # 14 nonassoc == != <=> eq ne cmp | |
182 | # 13 left & | |
183 | # 12 left | ^ | |
184 | # 11 left && | |
185 | # 10 left || | |
186 | # 9 nonassoc .. ... | |
187 | # 8 right ?: | |
188 | # 7 right = += -= *= etc. | |
189 | # 6 left , => | |
190 | # 5 nonassoc list operators (rightward) | |
191 | # 4 right not | |
192 | # 3 left and | |
193 | # 2 left or xor | |
194 | # 1 statement modifiers | |
195 | # 0 statement level | |
196 | ||
197 | # Nonprinting characters with special meaning: | |
198 | # \cS - steal parens (see maybe_parens_unop) | |
199 | # \n - newline and indent | |
200 | # \t - increase indent | |
201 | # \b - decrease indent (`outdent') | |
f5aa8f4e | 202 | # \f - flush left (no indent) |
9d2c6865 | 203 | # \cK - kill following semicolon, if any |
6e90668e SM |
204 | |
205 | sub null { | |
206 | my $op = shift; | |
207 | return class($op) eq "NULL"; | |
208 | } | |
209 | ||
210 | sub todo { | |
211 | my $self = shift; | |
212 | my($gv, $cv, $is_form) = @_; | |
213 | my $seq; | |
214 | if (!null($cv->START) and is_state($cv->START)) { | |
215 | $seq = $cv->START->cop_seq; | |
216 | } else { | |
217 | $seq = 0; | |
218 | } | |
219 | push @{$self->{'subs_todo'}}, [$seq, $gv, $is_form]; | |
220 | } | |
221 | ||
222 | sub next_todo { | |
223 | my $self = shift; | |
224 | my $ent = shift @{$self->{'subs_todo'}}; | |
225 | my $name = $self->gv_name($ent->[1]); | |
226 | if ($ent->[2]) { | |
227 | return "format $name =\n" | |
228 | . $self->deparse_format($ent->[1]->FORM). "\n"; | |
229 | } else { | |
3ed82cfc | 230 | return "sub $name " . $self->deparse_sub($ent->[1]->CV); |
6e90668e SM |
231 | } |
232 | } | |
233 | ||
6e90668e SM |
234 | sub walk_tree { |
235 | my($op, $sub) = @_; | |
236 | $sub->($op); | |
237 | if ($op->flags & OPf_KIDS) { | |
238 | my $kid; | |
239 | for ($kid = $op->first; not null $kid; $kid = $kid->sibling) { | |
240 | walk_tree($kid, $sub); | |
241 | } | |
242 | } | |
243 | } | |
244 | ||
245 | sub walk_sub { | |
246 | my $self = shift; | |
247 | my $cv = shift; | |
248 | my $op = $cv->ROOT; | |
249 | $op = shift if null $op; | |
250 | return if !$op or null $op; | |
251 | walk_tree($op, sub { | |
252 | my $op = shift; | |
3f872cb9 GS |
253 | if ($op->name eq "gv") { |
254 | if ($op->next->name eq "entersub") { | |
6e90668e SM |
255 | next if $self->{'subs_done'}{$ {$op->gv}}++; |
256 | next if class($op->gv->CV) eq "SPECIAL"; | |
257 | $self->todo($op->gv, $op->gv->CV, 0); | |
258 | $self->walk_sub($op->gv->CV); | |
3f872cb9 GS |
259 | } elsif ($op->next->name eq "enterwrite" |
260 | or ($op->next->name eq "rv2gv" | |
261 | and $op->next->next->name eq "enterwrite")) { | |
6e90668e SM |
262 | next if $self->{'forms_done'}{$ {$op->gv}}++; |
263 | next if class($op->gv->FORM) eq "SPECIAL"; | |
264 | $self->todo($op->gv, $op->gv->FORM, 1); | |
265 | $self->walk_sub($op->gv->FORM); | |
266 | } | |
267 | } | |
268 | }); | |
269 | } | |
270 | ||
271 | sub stash_subs { | |
272 | my $self = shift; | |
273 | my $pack = shift; | |
274 | my(%stash, @ret); | |
275 | { no strict 'refs'; %stash = svref_2object(\%{$pack . "::"})->ARRAY } | |
f5aa8f4e SM |
276 | if ($pack eq "main") { |
277 | $pack = ""; | |
278 | } else { | |
279 | $pack = $pack . "::"; | |
280 | } | |
6e90668e SM |
281 | my($key, $val); |
282 | while (($key, $val) = each %stash) { | |
f5aa8f4e SM |
283 | my $class = class($val); |
284 | if ($class eq "PV") { | |
285 | # Just a prototype | |
286 | push @{$self->{'protos_todo'}}, [$pack . $key, $val->PV]; | |
287 | } elsif ($class eq "IV") { | |
288 | # Just a name | |
289 | push @{$self->{'protos_todo'}}, [$pack . $key, undef]; | |
290 | } elsif ($class eq "GV") { | |
291 | if (class($val->CV) ne "SPECIAL") { | |
292 | next if $self->{'subs_done'}{$$val}++; | |
293 | $self->todo($val, $val->CV, 0); | |
294 | $self->walk_sub($val->CV); | |
295 | } | |
296 | if (class($val->FORM) ne "SPECIAL") { | |
297 | next if $self->{'forms_done'}{$$val}++; | |
298 | $self->todo($val, $val->FORM, 1); | |
299 | $self->walk_sub($val->FORM); | |
300 | } | |
6e90668e SM |
301 | } |
302 | } | |
303 | } | |
a798dbf2 | 304 | |
f5aa8f4e SM |
305 | sub print_protos { |
306 | my $self = shift; | |
307 | my $ar; | |
308 | my @ret; | |
309 | foreach $ar (@{$self->{'protos_todo'}}) { | |
310 | my $proto = (defined $ar->[1] ? " (". $ar->[1] . ")" : ""); | |
311 | push @ret, "sub " . $ar->[0] . "$proto;\n"; | |
312 | } | |
313 | delete $self->{'protos_todo'}; | |
314 | return @ret; | |
315 | } | |
316 | ||
9d2c6865 SM |
317 | sub style_opts { |
318 | my $self = shift; | |
319 | my $opts = shift; | |
320 | my $opt; | |
321 | while (length($opt = substr($opts, 0, 1))) { | |
322 | if ($opt eq "C") { | |
323 | $self->{'cuddle'} = " "; | |
f4a44678 SM |
324 | $opts = substr($opts, 1); |
325 | } elsif ($opt eq "i") { | |
326 | $opts =~ s/^i(\d+)//; | |
327 | $self->{'indent_size'} = $1; | |
328 | } elsif ($opt eq "T") { | |
329 | $self->{'use_tabs'} = 1; | |
330 | $opts = substr($opts, 1); | |
331 | } elsif ($opt eq "v") { | |
332 | $opts =~ s/^v([^.]*)(.|$)//; | |
333 | $self->{'ex_const'} = $1; | |
9d2c6865 | 334 | } |
9d2c6865 SM |
335 | } |
336 | } | |
337 | ||
f4a44678 SM |
338 | sub new { |
339 | my $class = shift; | |
340 | my $self = bless {}, $class; | |
341 | $self->{'subs_todo'} = []; | |
342 | $self->{'curstash'} = "main"; | |
343 | $self->{'cuddle'} = "\n"; | |
344 | $self->{'indent_size'} = 4; | |
345 | $self->{'use_tabs'} = 0; | |
346 | $self->{'ex_const'} = "'???'"; | |
347 | while (my $arg = shift @_) { | |
348 | if (substr($arg, 0, 2) eq "-u") { | |
349 | $self->stash_subs(substr($arg, 2)); | |
350 | } elsif ($arg eq "-p") { | |
351 | $self->{'parens'} = 1; | |
352 | } elsif ($arg eq "-l") { | |
353 | $self->{'linenums'} = 1; | |
354 | } elsif ($arg eq "-q") { | |
355 | $self->{'unquote'} = 1; | |
356 | } elsif (substr($arg, 0, 2) eq "-s") { | |
357 | $self->style_opts(substr $arg, 2); | |
358 | } | |
359 | } | |
360 | return $self; | |
361 | } | |
362 | ||
a798dbf2 | 363 | sub compile { |
6e90668e SM |
364 | my(@args) = @_; |
365 | return sub { | |
f4a44678 | 366 | my $self = B::Deparse->new(@args); |
6e90668e SM |
367 | $self->stash_subs("main"); |
368 | $self->{'curcv'} = main_cv; | |
6e90668e | 369 | $self->walk_sub(main_cv, main_start); |
f5aa8f4e | 370 | print $self->print_protos; |
6e90668e | 371 | @{$self->{'subs_todo'}} = |
f4a44678 SM |
372 | sort {$a->[0] <=> $b->[0]} @{$self->{'subs_todo'}}; |
373 | print $self->indent($self->deparse(main_root, 0)), "\n" | |
374 | unless null main_root; | |
6e90668e SM |
375 | my @text; |
376 | while (scalar(@{$self->{'subs_todo'}})) { | |
377 | push @text, $self->next_todo; | |
378 | } | |
379 | print indent(join("", @text)), "\n" if @text; | |
a798dbf2 | 380 | } |
a798dbf2 MB |
381 | } |
382 | ||
f4a44678 SM |
383 | sub coderef2text { |
384 | my $self = shift; | |
385 | my $sub = shift; | |
386 | croak "Usage: ->coderef2text(CODEREF)" unless ref($sub) eq "CODE"; | |
387 | return $self->indent($self->deparse_sub(svref_2object($sub))); | |
388 | } | |
389 | ||
6e90668e SM |
390 | sub deparse { |
391 | my $self = shift; | |
9d2c6865 SM |
392 | my($op, $cx) = @_; |
393 | # cluck if class($op) eq "NULL"; | |
3f872cb9 GS |
394 | # return $self->$ {\("pp_" . $op->name)}($op, $cx); |
395 | my $meth = "pp_" . $op->name; | |
9d2c6865 | 396 | return $self->$meth($op, $cx); |
a798dbf2 MB |
397 | } |
398 | ||
6e90668e | 399 | sub indent { |
f4a44678 | 400 | my $self = shift; |
6e90668e SM |
401 | my $txt = shift; |
402 | my @lines = split(/\n/, $txt); | |
403 | my $leader = ""; | |
f4a44678 | 404 | my $level = 0; |
6e90668e SM |
405 | my $line; |
406 | for $line (@lines) { | |
f4a44678 SM |
407 | my $cmd = substr($line, 0, 1); |
408 | if ($cmd eq "\t" or $cmd eq "\b") { | |
409 | $level += ($cmd eq "\t" ? 1 : -1) * $self->{'indent_size'}; | |
410 | if ($self->{'use_tabs'}) { | |
411 | $leader = "\t" x ($level / 8) . " " x ($level % 8); | |
412 | } else { | |
413 | $leader = " " x $level; | |
414 | } | |
6e90668e SM |
415 | $line = substr($line, 1); |
416 | } | |
f5aa8f4e SM |
417 | if (substr($line, 0, 1) eq "\f") { |
418 | $line = substr($line, 1); # no indent | |
419 | } else { | |
420 | $line = $leader . $line; | |
421 | } | |
9d2c6865 | 422 | $line =~ s/\cK;?//g; |
6e90668e SM |
423 | } |
424 | return join("\n", @lines); | |
425 | } | |
426 | ||
6e90668e SM |
427 | sub deparse_sub { |
428 | my $self = shift; | |
429 | my $cv = shift; | |
430 | my $proto = ""; | |
431 | if ($cv->FLAGS & SVf_POK) { | |
432 | $proto = "(". $cv->PV . ") "; | |
433 | } | |
434 | local($self->{'curcv'}) = $cv; | |
435 | local($self->{'curstash'}) = $self->{'curstash'}; | |
436 | if (not null $cv->ROOT) { | |
437 | # skip leavesub | |
438 | return $proto . "{\n\t" . | |
9d2c6865 | 439 | $self->deparse($cv->ROOT->first, 0) . "\n\b}\n"; |
6e90668e SM |
440 | } else { # XSUB? |
441 | return $proto . "{}\n"; | |
442 | } | |
443 | } | |
444 | ||
445 | sub deparse_format { | |
446 | my $self = shift; | |
447 | my $form = shift; | |
448 | my @text; | |
449 | local($self->{'curcv'}) = $form; | |
450 | local($self->{'curstash'}) = $self->{'curstash'}; | |
451 | my $op = $form->ROOT; | |
452 | my $kid; | |
453 | $op = $op->first->first; # skip leavewrite, lineseq | |
454 | while (not null $op) { | |
455 | $op = $op->sibling; # skip nextstate | |
456 | my @exprs; | |
457 | $kid = $op->first->sibling; # skip pushmark | |
458 | push @text, $kid->sv->PV; | |
459 | $kid = $kid->sibling; | |
460 | for (; not null $kid; $kid = $kid->sibling) { | |
9d2c6865 | 461 | push @exprs, $self->deparse($kid, 0); |
6e90668e SM |
462 | } |
463 | push @text, join(", ", @exprs)."\n" if @exprs; | |
464 | $op = $op->sibling; | |
465 | } | |
466 | return join("", @text) . "."; | |
467 | } | |
468 | ||
6e90668e | 469 | sub is_scope { |
a798dbf2 | 470 | my $op = shift; |
3f872cb9 GS |
471 | return $op->name eq "leave" || $op->name eq "scope" |
472 | || $op->name eq "lineseq" | |
473 | || ($op->name eq "null" && class($op) eq "UNOP" | |
474 | && (is_scope($op->first) || $op->first->name eq "enter")); | |
6e90668e SM |
475 | } |
476 | ||
477 | sub is_state { | |
3f872cb9 GS |
478 | my $name = $_[0]->name; |
479 | return $name eq "nextstate" || $name eq "dbstate" || $name eq "setstate"; | |
6e90668e SM |
480 | } |
481 | ||
482 | sub is_miniwhile { # check for one-line loop (`foo() while $y--') | |
483 | my $op = shift; | |
484 | return (!null($op) and null($op->sibling) | |
3f872cb9 GS |
485 | and $op->name eq "null" and class($op) eq "UNOP" |
486 | and (($op->first->name =~ /^(and|or)$/ | |
487 | and $op->first->first->sibling->name eq "lineseq") | |
488 | or ($op->first->name eq "lineseq" | |
6e90668e | 489 | and not null $op->first->first->sibling |
3f872cb9 | 490 | and $op->first->first->sibling->name eq "unstack") |
6e90668e SM |
491 | )); |
492 | } | |
493 | ||
494 | sub is_scalar { | |
495 | my $op = shift; | |
3f872cb9 GS |
496 | return ($op->name eq "rv2sv" or |
497 | $op->name eq "padsv" or | |
498 | $op->name eq "gv" or # only in array/hash constructs | |
bd0865ec | 499 | $op->flags & OPf_KIDS && !null($op->first) |
3f872cb9 | 500 | && $op->first->name eq "gvsv"); |
6e90668e SM |
501 | } |
502 | ||
9d2c6865 SM |
503 | sub maybe_parens { |
504 | my $self = shift; | |
505 | my($text, $cx, $prec) = @_; | |
506 | if ($prec < $cx # unary ops nest just fine | |
507 | or $prec == $cx and $cx != 4 and $cx != 16 and $cx != 21 | |
508 | or $self->{'parens'}) | |
509 | { | |
510 | $text = "($text)"; | |
511 | # In a unop, let parent reuse our parens; see maybe_parens_unop | |
512 | $text = "\cS" . $text if $cx == 16; | |
513 | return $text; | |
514 | } else { | |
515 | return $text; | |
516 | } | |
517 | } | |
518 | ||
519 | # same as above, but get around the `if it looks like a function' rule | |
520 | sub maybe_parens_unop { | |
521 | my $self = shift; | |
522 | my($name, $kid, $cx) = @_; | |
523 | if ($cx > 16 or $self->{'parens'}) { | |
524 | return "$name(" . $self->deparse($kid, 1) . ")"; | |
525 | } else { | |
526 | $kid = $self->deparse($kid, 16); | |
527 | if (substr($kid, 0, 1) eq "\cS") { | |
528 | # use kid's parens | |
529 | return $name . substr($kid, 1); | |
530 | } elsif (substr($kid, 0, 1) eq "(") { | |
531 | # avoid looks-like-a-function trap with extra parens | |
532 | # (`+' can lead to ambiguities) | |
533 | return "$name(" . $kid . ")"; | |
534 | } else { | |
535 | return "$name $kid"; | |
536 | } | |
537 | } | |
538 | } | |
539 | ||
540 | sub maybe_parens_func { | |
541 | my $self = shift; | |
542 | my($func, $text, $cx, $prec) = @_; | |
543 | if ($prec <= $cx or substr($text, 0, 1) eq "(" or $self->{'parens'}) { | |
544 | return "$func($text)"; | |
545 | } else { | |
546 | return "$func $text"; | |
547 | } | |
548 | } | |
549 | ||
6e90668e SM |
550 | sub maybe_local { |
551 | my $self = shift; | |
9d2c6865 | 552 | my($op, $cx, $text) = @_; |
4c1f658f | 553 | if ($op->private & OPpLVAL_INTRO and not $self->{'avoid_local'}{$$op}) { |
9d2c6865 | 554 | return $self->maybe_parens_func("local", $text, $cx, 16); |
6e90668e SM |
555 | } else { |
556 | return $text; | |
a798dbf2 | 557 | } |
a798dbf2 MB |
558 | } |
559 | ||
3ed82cfc GS |
560 | sub maybe_targmy { |
561 | my $self = shift; | |
562 | my($op, $cx, $func, @args) = @_; | |
563 | if ($op->private & OPpTARGET_MY) { | |
564 | my $var = $self->padname($op->targ); | |
565 | my $val = $func->($self, $op, 7, @args); | |
566 | return $self->maybe_parens("$var = $val", $cx, 7); | |
567 | } else { | |
568 | return $func->($self, $op, $cx, @args); | |
569 | } | |
570 | } | |
571 | ||
6e90668e SM |
572 | sub padname_sv { |
573 | my $self = shift; | |
574 | my $targ = shift; | |
575 | return (($self->{'curcv'}->PADLIST->ARRAY)[0]->ARRAY)[$targ]; | |
576 | } | |
577 | ||
578 | sub maybe_my { | |
579 | my $self = shift; | |
9d2c6865 | 580 | my($op, $cx, $text) = @_; |
4c1f658f | 581 | if ($op->private & OPpLVAL_INTRO and not $self->{'avoid_local'}{$$op}) { |
9d2c6865 | 582 | return $self->maybe_parens_func("my", $text, $cx, 16); |
6e90668e SM |
583 | } else { |
584 | return $text; | |
585 | } | |
586 | } | |
587 | ||
9d2c6865 SM |
588 | # The following OPs don't have functions: |
589 | ||
590 | # pp_padany -- does not exist after parsing | |
591 | # pp_rcatline -- does not exist | |
592 | ||
593 | sub pp_enter { # see also leave | |
594 | cluck "unexpected OP_ENTER"; | |
595 | return "XXX"; | |
596 | } | |
597 | ||
598 | sub pp_pushmark { # see also list | |
599 | cluck "unexpected OP_PUSHMARK"; | |
600 | return "XXX"; | |
601 | } | |
602 | ||
603 | sub pp_leavesub { # see also deparse_sub | |
604 | cluck "unexpected OP_LEAVESUB"; | |
605 | return "XXX"; | |
606 | } | |
607 | ||
608 | sub pp_leavewrite { # see also deparse_format | |
609 | cluck "unexpected OP_LEAVEWRITE"; | |
610 | return "XXX"; | |
611 | } | |
612 | ||
613 | sub pp_method { # see also entersub | |
614 | cluck "unexpected OP_METHOD"; | |
615 | return "XXX"; | |
616 | } | |
617 | ||
618 | sub pp_regcmaybe { # see also regcomp | |
619 | cluck "unexpected OP_REGCMAYBE"; | |
620 | return "XXX"; | |
621 | } | |
622 | ||
90be192f SM |
623 | sub pp_regcreset { # see also regcomp |
624 | cluck "unexpected OP_REGCRESET"; | |
625 | return "XXX"; | |
626 | } | |
627 | ||
9d2c6865 SM |
628 | sub pp_substcont { # see also subst |
629 | cluck "unexpected OP_SUBSTCONT"; | |
630 | return "XXX"; | |
631 | } | |
632 | ||
633 | sub pp_grepstart { # see also grepwhile | |
634 | cluck "unexpected OP_GREPSTART"; | |
635 | return "XXX"; | |
636 | } | |
637 | ||
638 | sub pp_mapstart { # see also mapwhile | |
639 | cluck "unexpected OP_MAPSTART"; | |
640 | return "XXX"; | |
641 | } | |
642 | ||
643 | sub pp_flip { # see also flop | |
644 | cluck "unexpected OP_FLIP"; | |
645 | return "XXX"; | |
646 | } | |
647 | ||
648 | sub pp_iter { # see also leaveloop | |
649 | cluck "unexpected OP_ITER"; | |
650 | return "XXX"; | |
651 | } | |
652 | ||
653 | sub pp_enteriter { # see also leaveloop | |
654 | cluck "unexpected OP_ENTERITER"; | |
655 | return "XXX"; | |
656 | } | |
657 | ||
658 | sub pp_enterloop { # see also leaveloop | |
659 | cluck "unexpected OP_ENTERLOOP"; | |
660 | return "XXX"; | |
661 | } | |
662 | ||
663 | sub pp_leaveeval { # see also entereval | |
664 | cluck "unexpected OP_LEAVEEVAL"; | |
665 | return "XXX"; | |
666 | } | |
667 | ||
668 | sub pp_entertry { # see also leavetry | |
669 | cluck "unexpected OP_ENTERTRY"; | |
670 | return "XXX"; | |
671 | } | |
6e90668e | 672 | |
9d2c6865 | 673 | # leave and scope/lineseq should probably share code |
a798dbf2 | 674 | sub pp_leave { |
6e90668e | 675 | my $self = shift; |
9d2c6865 | 676 | my($op, $cx) = @_; |
6e90668e SM |
677 | my ($kid, $expr); |
678 | my @exprs; | |
679 | local($self->{'curstash'}) = $self->{'curstash'}; | |
680 | $kid = $op->first->sibling; # skip enter | |
681 | if (is_miniwhile($kid)) { | |
682 | my $top = $kid->first; | |
3f872cb9 GS |
683 | my $name = $top->name; |
684 | if ($name eq "and") { | |
6e90668e | 685 | $name = "while"; |
3f872cb9 | 686 | } elsif ($name eq "or") { |
6e90668e SM |
687 | $name = "until"; |
688 | } else { # no conditional -> while 1 or until 0 | |
9d2c6865 | 689 | return $self->deparse($top->first, 1) . " while 1"; |
6e90668e SM |
690 | } |
691 | my $cond = $top->first; | |
9d2c6865 SM |
692 | my $body = $cond->sibling->first; # skip lineseq |
693 | $cond = $self->deparse($cond, 1); | |
694 | $body = $self->deparse($body, 1); | |
6e90668e SM |
695 | return "$body $name $cond"; |
696 | } | |
697 | for (; !null($kid); $kid = $kid->sibling) { | |
698 | $expr = ""; | |
699 | if (is_state $kid) { | |
9d2c6865 | 700 | $expr = $self->deparse($kid, 0); |
6e90668e SM |
701 | $kid = $kid->sibling; |
702 | last if null $kid; | |
703 | } | |
9d2c6865 | 704 | $expr .= $self->deparse($kid, 0); |
f4a44678 | 705 | push @exprs, $expr if length $expr; |
6e90668e | 706 | } |
9d2c6865 SM |
707 | if ($cx > 0) { # inside an expression |
708 | return "do { " . join(";\n", @exprs) . " }"; | |
709 | } else { | |
f5aa8f4e | 710 | return join(";\n", @exprs) . ";"; |
9d2c6865 | 711 | } |
6e90668e SM |
712 | } |
713 | ||
714 | sub pp_scope { | |
715 | my $self = shift; | |
9d2c6865 | 716 | my($op, $cx) = @_; |
6e90668e SM |
717 | my ($kid, $expr); |
718 | my @exprs; | |
719 | for ($kid = $op->first; !null($kid); $kid = $kid->sibling) { | |
720 | $expr = ""; | |
721 | if (is_state $kid) { | |
9d2c6865 | 722 | $expr = $self->deparse($kid, 0); |
6e90668e SM |
723 | $kid = $kid->sibling; |
724 | last if null $kid; | |
725 | } | |
9d2c6865 | 726 | $expr .= $self->deparse($kid, 0); |
f4a44678 | 727 | push @exprs, $expr if length $expr; |
6e90668e | 728 | } |
9d2c6865 SM |
729 | if ($cx > 0) { # inside an expression, (a do {} while for lineseq) |
730 | return "do { " . join(";\n", @exprs) . " }"; | |
731 | } else { | |
f5aa8f4e | 732 | return join(";\n", @exprs) . ";"; |
6e90668e | 733 | } |
6e90668e SM |
734 | } |
735 | ||
9d2c6865 SM |
736 | sub pp_lineseq { pp_scope(@_) } |
737 | ||
6e90668e SM |
738 | # The BEGIN {} is used here because otherwise this code isn't executed |
739 | # when you run B::Deparse on itself. | |
740 | my %globalnames; | |
741 | BEGIN { map($globalnames{$_}++, "SIG", "STDIN", "STDOUT", "STDERR", "INC", | |
742 | "ENV", "ARGV", "ARGVOUT", "_"); } | |
743 | ||
744 | sub gv_name { | |
745 | my $self = shift; | |
746 | my $gv = shift; | |
747 | my $stash = $gv->STASH->NAME; | |
748 | my $name = $gv->NAME; | |
9d2c6865 SM |
749 | if ($stash eq $self->{'curstash'} or $globalnames{$name} |
750 | or $name =~ /^[^A-Za-z_]/) | |
751 | { | |
6e90668e SM |
752 | $stash = ""; |
753 | } else { | |
754 | $stash = $stash . "::"; | |
a798dbf2 | 755 | } |
6e90668e SM |
756 | if ($name =~ /^([\cA-\cZ])$/) { |
757 | $name = "^" . chr(64 + ord($1)); | |
758 | } | |
759 | return $stash . $name; | |
a798dbf2 MB |
760 | } |
761 | ||
6e90668e SM |
762 | # Notice how subs and formats are inserted between statements here |
763 | sub pp_nextstate { | |
764 | my $self = shift; | |
9d2c6865 | 765 | my($op, $cx) = @_; |
6e90668e SM |
766 | my @text; |
767 | @text = $op->label . ": " if $op->label; | |
768 | my $seq = $op->cop_seq; | |
769 | while (scalar(@{$self->{'subs_todo'}}) | |
770 | and $seq > $self->{'subs_todo'}[0][0]) { | |
771 | push @text, $self->next_todo; | |
772 | } | |
773 | my $stash = $op->stash->NAME; | |
774 | if ($stash ne $self->{'curstash'}) { | |
775 | push @text, "package $stash;\n"; | |
776 | $self->{'curstash'} = $stash; | |
777 | } | |
f5aa8f4e SM |
778 | if ($self->{'linenums'}) { |
779 | push @text, "\f#line " . $op->line . | |
780 | ' "' . substr($op->filegv->NAME, 2), qq'"\n'; | |
781 | } | |
6e90668e SM |
782 | return join("", @text); |
783 | } | |
784 | ||
785 | sub pp_dbstate { pp_nextstate(@_) } | |
3f872cb9 | 786 | sub pp_setstate { pp_nextstate(@_) } |
6e90668e SM |
787 | |
788 | sub pp_unstack { return "" } # see also leaveloop | |
789 | ||
790 | sub baseop { | |
791 | my $self = shift; | |
9d2c6865 | 792 | my($op, $cx, $name) = @_; |
6e90668e SM |
793 | return $name; |
794 | } | |
795 | ||
796 | sub pp_stub { baseop(@_, "()") } | |
797 | sub pp_wantarray { baseop(@_, "wantarray") } | |
798 | sub pp_fork { baseop(@_, "fork") } | |
3ed82cfc GS |
799 | sub pp_wait { maybe_targmy(@_, \&baseop, "wait") } |
800 | sub pp_getppid { maybe_targmy(@_, \&baseop, "getppid") } | |
801 | sub pp_time { maybe_targmy(@_, \&baseop, "time") } | |
6e90668e SM |
802 | sub pp_tms { baseop(@_, "times") } |
803 | sub pp_ghostent { baseop(@_, "gethostent") } | |
804 | sub pp_gnetent { baseop(@_, "getnetent") } | |
805 | sub pp_gprotoent { baseop(@_, "getprotoent") } | |
806 | sub pp_gservent { baseop(@_, "getservent") } | |
807 | sub pp_ehostent { baseop(@_, "endhostent") } | |
808 | sub pp_enetent { baseop(@_, "endnetent") } | |
809 | sub pp_eprotoent { baseop(@_, "endprotoent") } | |
810 | sub pp_eservent { baseop(@_, "endservent") } | |
811 | sub pp_gpwent { baseop(@_, "getpwent") } | |
812 | sub pp_spwent { baseop(@_, "setpwent") } | |
813 | sub pp_epwent { baseop(@_, "endpwent") } | |
814 | sub pp_ggrent { baseop(@_, "getgrent") } | |
815 | sub pp_sgrent { baseop(@_, "setgrent") } | |
816 | sub pp_egrent { baseop(@_, "endgrent") } | |
817 | sub pp_getlogin { baseop(@_, "getlogin") } | |
818 | ||
819 | sub POSTFIX () { 1 } | |
820 | ||
9d2c6865 SM |
821 | # I couldn't think of a good short name, but this is the category of |
822 | # symbolic unary operators with interesting precedence | |
823 | ||
824 | sub pfixop { | |
825 | my $self = shift; | |
826 | my($op, $cx, $name, $prec, $flags) = (@_, 0); | |
827 | my $kid = $op->first; | |
828 | $kid = $self->deparse($kid, $prec); | |
829 | return $self->maybe_parens(($flags & POSTFIX) ? "$kid$name" : "$name$kid", | |
830 | $cx, $prec); | |
831 | } | |
832 | ||
833 | sub pp_preinc { pfixop(@_, "++", 23) } | |
834 | sub pp_predec { pfixop(@_, "--", 23) } | |
3ed82cfc GS |
835 | sub pp_postinc { maybe_targmy(@_, \&pfixop, "++", 23, POSTFIX) } |
836 | sub pp_postdec { maybe_targmy(@_, \&pfixop, "--", 23, POSTFIX) } | |
9d2c6865 SM |
837 | sub pp_i_preinc { pfixop(@_, "++", 23) } |
838 | sub pp_i_predec { pfixop(@_, "--", 23) } | |
3ed82cfc GS |
839 | sub pp_i_postinc { maybe_targmy(@_, \&pfixop, "++", 23, POSTFIX) } |
840 | sub pp_i_postdec { maybe_targmy(@_, \&pfixop, "--", 23, POSTFIX) } | |
841 | sub pp_complement { maybe_targmy(@_. \&pfixop, "~", 21) } | |
9d2c6865 | 842 | |
3ed82cfc GS |
843 | sub pp_negate { maybe_targmy(@_, \&real_negate) } |
844 | sub real_negate { | |
9d2c6865 SM |
845 | my $self = shift; |
846 | my($op, $cx) = @_; | |
3f872cb9 | 847 | if ($op->first->name =~ /^(i_)?negate$/) { |
9d2c6865 SM |
848 | # avoid --$x |
849 | $self->pfixop($op, $cx, "-", 21.5); | |
850 | } else { | |
851 | $self->pfixop($op, $cx, "-", 21); | |
852 | } | |
853 | } | |
854 | sub pp_i_negate { pp_negate(@_) } | |
855 | ||
856 | sub pp_not { | |
857 | my $self = shift; | |
858 | my($op, $cx) = @_; | |
859 | if ($cx <= 4) { | |
860 | $self->pfixop($op, $cx, "not ", 4); | |
861 | } else { | |
862 | $self->pfixop($op, $cx, "!", 21); | |
863 | } | |
864 | } | |
865 | ||
6e90668e SM |
866 | sub unop { |
867 | my $self = shift; | |
f4a44678 | 868 | my($op, $cx, $name) = @_; |
6e90668e | 869 | my $kid; |
9d2c6865 | 870 | if ($op->flags & OPf_KIDS) { |
6e90668e | 871 | $kid = $op->first; |
9d2c6865 | 872 | return $self->maybe_parens_unop($name, $kid, $cx); |
6e90668e | 873 | } else { |
9d2c6865 | 874 | return $name . ($op->flags & OPf_SPECIAL ? "()" : ""); |
6e90668e | 875 | } |
6e90668e SM |
876 | } |
877 | ||
3ed82cfc GS |
878 | sub pp_chop { maybe_targmy(@_, \&unop, "chop") } |
879 | sub pp_chomp { maybe_targmy(@_, \&unop, "chomp") } | |
880 | sub pp_schop { maybe_targmy(@_, \&unop, "chop") } | |
881 | sub pp_schomp { maybe_targmy(@_, \&unop, "chomp") } | |
6e90668e SM |
882 | sub pp_defined { unop(@_, "defined") } |
883 | sub pp_undef { unop(@_, "undef") } | |
884 | sub pp_study { unop(@_, "study") } | |
6e90668e SM |
885 | sub pp_ref { unop(@_, "ref") } |
886 | sub pp_pos { maybe_local(@_, unop(@_, "pos")) } | |
887 | ||
3ed82cfc GS |
888 | sub pp_sin { maybe_targmy(@_, \&unop, "sin") } |
889 | sub pp_cos { maybe_targmy(@_, \&unop, "cos") } | |
890 | sub pp_rand { maybe_targmy(@_, \&unop, "rand") } | |
6e90668e | 891 | sub pp_srand { unop(@_, "srand") } |
3ed82cfc GS |
892 | sub pp_exp { maybe_targmy(@_, \&unop, "exp") } |
893 | sub pp_log { maybe_targmy(@_, \&unop, "log") } | |
894 | sub pp_sqrt { maybe_targmy(@_, \&unop, "sqrt") } | |
895 | sub pp_int { maybe_targmy(@_, \&unop, "int") } | |
896 | sub pp_hex { maybe_targmy(@_, \&unop, "hex") } | |
897 | sub pp_oct { maybe_targmy(@_, \&unop, "oct") } | |
898 | sub pp_abs { maybe_targmy(@_, \&unop, "abs") } | |
899 | ||
900 | sub pp_length { maybe_targmy(@_, \&unop, "length") } | |
901 | sub pp_ord { maybe_targmy(@_, \&unop, "ord") } | |
902 | sub pp_chr { maybe_targmy(@_, \&unop, "chr") } | |
6e90668e SM |
903 | |
904 | sub pp_each { unop(@_, "each") } | |
905 | sub pp_values { unop(@_, "values") } | |
906 | sub pp_keys { unop(@_, "keys") } | |
907 | sub pp_pop { unop(@_, "pop") } | |
908 | sub pp_shift { unop(@_, "shift") } | |
909 | ||
910 | sub pp_caller { unop(@_, "caller") } | |
911 | sub pp_reset { unop(@_, "reset") } | |
912 | sub pp_exit { unop(@_, "exit") } | |
913 | sub pp_prototype { unop(@_, "prototype") } | |
914 | ||
915 | sub pp_close { unop(@_, "close") } | |
916 | sub pp_fileno { unop(@_, "fileno") } | |
917 | sub pp_umask { unop(@_, "umask") } | |
918 | sub pp_binmode { unop(@_, "binmode") } | |
919 | sub pp_untie { unop(@_, "untie") } | |
920 | sub pp_tied { unop(@_, "tied") } | |
921 | sub pp_dbmclose { unop(@_, "dbmclose") } | |
922 | sub pp_getc { unop(@_, "getc") } | |
923 | sub pp_eof { unop(@_, "eof") } | |
924 | sub pp_tell { unop(@_, "tell") } | |
925 | sub pp_getsockname { unop(@_, "getsockname") } | |
926 | sub pp_getpeername { unop(@_, "getpeername") } | |
927 | ||
3ed82cfc GS |
928 | sub pp_chdir { maybe_targmy(@_, \&unop, "chdir") } |
929 | sub pp_chroot { maybe_targmy(@_, \&unop, "chroot") } | |
6e90668e | 930 | sub pp_readlink { unop(@_, "readlink") } |
3ed82cfc | 931 | sub pp_rmdir { maybe_targmy(@_, \&unop, "rmdir") } |
6e90668e SM |
932 | sub pp_readdir { unop(@_, "readdir") } |
933 | sub pp_telldir { unop(@_, "telldir") } | |
934 | sub pp_rewinddir { unop(@_, "rewinddir") } | |
935 | sub pp_closedir { unop(@_, "closedir") } | |
3ed82cfc | 936 | sub pp_getpgrp { maybe_targmy(@_, \&unop, "getpgrp") } |
6e90668e SM |
937 | sub pp_localtime { unop(@_, "localtime") } |
938 | sub pp_gmtime { unop(@_, "gmtime") } | |
939 | sub pp_alarm { unop(@_, "alarm") } | |
3ed82cfc | 940 | sub pp_sleep { maybe_targmy(@_, \&unop, "sleep") } |
6e90668e SM |
941 | |
942 | sub pp_dofile { unop(@_, "do") } | |
943 | sub pp_entereval { unop(@_, "eval") } | |
944 | ||
945 | sub pp_ghbyname { unop(@_, "gethostbyname") } | |
946 | sub pp_gnbyname { unop(@_, "getnetbyname") } | |
947 | sub pp_gpbyname { unop(@_, "getprotobyname") } | |
948 | sub pp_shostent { unop(@_, "sethostent") } | |
949 | sub pp_snetent { unop(@_, "setnetent") } | |
950 | sub pp_sprotoent { unop(@_, "setprotoent") } | |
951 | sub pp_sservent { unop(@_, "setservent") } | |
952 | sub pp_gpwnam { unop(@_, "getpwnam") } | |
953 | sub pp_gpwuid { unop(@_, "getpwuid") } | |
954 | sub pp_ggrnam { unop(@_, "getgrnam") } | |
955 | sub pp_ggrgid { unop(@_, "getgrgid") } | |
956 | ||
957 | sub pp_lock { unop(@_, "lock") } | |
958 | ||
959 | sub pp_exists { | |
960 | my $self = shift; | |
9d2c6865 SM |
961 | my($op, $cx) = @_; |
962 | return $self->maybe_parens_func("exists", $self->pp_helem($op->first, 16), | |
963 | $cx, 16); | |
6e90668e SM |
964 | } |
965 | ||
6e90668e SM |
966 | sub pp_delete { |
967 | my $self = shift; | |
9d2c6865 | 968 | my($op, $cx) = @_; |
6e90668e SM |
969 | my $arg; |
970 | if ($op->private & OPpSLICE) { | |
9d2c6865 SM |
971 | return $self->maybe_parens_func("delete", |
972 | $self->pp_hslice($op->first, 16), | |
973 | $cx, 16); | |
6e90668e | 974 | } else { |
9d2c6865 SM |
975 | return $self->maybe_parens_func("delete", |
976 | $self->pp_helem($op->first, 16), | |
977 | $cx, 16); | |
6e90668e | 978 | } |
6e90668e SM |
979 | } |
980 | ||
6e90668e SM |
981 | sub pp_require { |
982 | my $self = shift; | |
9d2c6865 | 983 | my($op, $cx) = @_; |
3f872cb9 | 984 | if (class($op) eq "UNOP" and $op->first->name eq "const" |
4c1f658f | 985 | and $op->first->private & OPpCONST_BARE) |
6e90668e SM |
986 | { |
987 | my $name = $op->first->sv->PV; | |
988 | $name =~ s[/][::]g; | |
989 | $name =~ s/\.pm//g; | |
990 | return "require($name)"; | |
991 | } else { | |
9d2c6865 | 992 | $self->unop($op, $cx, "require"); |
6e90668e SM |
993 | } |
994 | } | |
995 | ||
9d2c6865 SM |
996 | sub pp_scalar { |
997 | my $self = shift; | |
998 | my($op, $cv) = @_; | |
999 | my $kid = $op->first; | |
1000 | if (not null $kid->sibling) { | |
1001 | # XXX Was a here-doc | |
1002 | return $self->dquote($op); | |
1003 | } | |
1004 | $self->unop(@_, "scalar"); | |
1005 | } | |
1006 | ||
1007 | ||
6e90668e SM |
1008 | sub padval { |
1009 | my $self = shift; | |
1010 | my $targ = shift; | |
1011 | return (($self->{'curcv'}->PADLIST->ARRAY)[1]->ARRAY)[$targ]; | |
1012 | } | |
1013 | ||
1014 | sub pp_refgen { | |
1015 | my $self = shift; | |
9d2c6865 | 1016 | my($op, $cx) = @_; |
6e90668e | 1017 | my $kid = $op->first; |
3f872cb9 | 1018 | if ($kid->name eq "null") { |
6e90668e | 1019 | $kid = $kid->first; |
3f872cb9 GS |
1020 | if ($kid->name eq "anonlist" || $kid->name eq "anonhash") { |
1021 | my($pre, $post) = @{{"anonlist" => ["[","]"], | |
1022 | "anonhash" => ["{","}"]}->{$kid->name}}; | |
6e90668e SM |
1023 | my($expr, @exprs); |
1024 | $kid = $kid->first->sibling; # skip pushmark | |
1025 | for (; !null($kid); $kid = $kid->sibling) { | |
9d2c6865 | 1026 | $expr = $self->deparse($kid, 6); |
6e90668e SM |
1027 | push @exprs, $expr; |
1028 | } | |
1029 | return $pre . join(", ", @exprs) . $post; | |
1030 | } elsif (!null($kid->sibling) and | |
3f872cb9 | 1031 | $kid->sibling->name eq "anoncode") { |
6e90668e SM |
1032 | return "sub " . |
1033 | $self->deparse_sub($self->padval($kid->sibling->targ)); | |
3f872cb9 GS |
1034 | } elsif ($kid->name eq "pushmark") { |
1035 | my $sib_name = $kid->sibling->name; | |
1036 | if ($sib_name =~ /^(pad|rv2)[ah]v$/ | |
c8c62db7 AD |
1037 | and not $kid->sibling->flags & OPf_REF) |
1038 | { | |
1039 | # The @a in \(@a) isn't in ref context, but only when the | |
1040 | # parens are there. | |
1041 | return "\\(" . $self->deparse($kid->sibling, 1) . ")"; | |
3f872cb9 | 1042 | } elsif ($sib_name eq 'entersub') { |
c8c62db7 AD |
1043 | my $text = $self->deparse($kid->sibling, 1); |
1044 | # Always show parens for \(&func()), but only with -p otherwise | |
1045 | $text = "($text)" if $self->{'parens'} | |
1046 | or $kid->sibling->private & OPpENTERSUB_AMPER; | |
1047 | return "\\$text"; | |
1048 | } | |
1049 | } | |
6e90668e | 1050 | } |
9d2c6865 | 1051 | $self->pfixop($op, $cx, "\\", 20); |
6e90668e SM |
1052 | } |
1053 | ||
1054 | sub pp_srefgen { pp_refgen(@_) } | |
1055 | ||
1056 | sub pp_readline { | |
1057 | my $self = shift; | |
9d2c6865 | 1058 | my($op, $cx) = @_; |
6e90668e | 1059 | my $kid = $op->first; |
3f872cb9 | 1060 | $kid = $kid->first if $kid->name eq "rv2gv"; # <$fh> |
9d2c6865 | 1061 | return "<" . $self->deparse($kid, 1) . ">"; |
6e90668e SM |
1062 | } |
1063 | ||
bd0865ec GS |
1064 | # Unary operators that can occur as pseudo-listops inside double quotes |
1065 | sub dq_unop { | |
1066 | my $self = shift; | |
1067 | my($op, $cx, $name, $prec, $flags) = (@_, 0, 0); | |
1068 | my $kid; | |
1069 | if ($op->flags & OPf_KIDS) { | |
1070 | $kid = $op->first; | |
1071 | # If there's more than one kid, the first is an ex-pushmark. | |
1072 | $kid = $kid->sibling if not null $kid->sibling; | |
1073 | return $self->maybe_parens_unop($name, $kid, $cx); | |
1074 | } else { | |
1075 | return $name . ($op->flags & OPf_SPECIAL ? "()" : ""); | |
1076 | } | |
1077 | } | |
1078 | ||
1079 | sub pp_ucfirst { dq_unop(@_, "ucfirst") } | |
1080 | sub pp_lcfirst { dq_unop(@_, "lcfirst") } | |
1081 | sub pp_uc { dq_unop(@_, "uc") } | |
1082 | sub pp_lc { dq_unop(@_, "lc") } | |
3ed82cfc | 1083 | sub pp_quotemeta { maybe_targmy(@_, \&dq_unop, "quotemeta") } |
bd0865ec | 1084 | |
6e90668e SM |
1085 | sub loopex { |
1086 | my $self = shift; | |
9d2c6865 | 1087 | my ($op, $cx, $name) = @_; |
6e90668e | 1088 | if (class($op) eq "PVOP") { |
9d2c6865 SM |
1089 | return "$name " . $op->pv; |
1090 | } elsif (class($op) eq "OP") { | |
1091 | return $name; | |
6e90668e | 1092 | } elsif (class($op) eq "UNOP") { |
9d2c6865 SM |
1093 | # Note -- loop exits are actually exempt from the |
1094 | # looks-like-a-func rule, but a few extra parens won't hurt | |
1095 | return $self->maybe_parens_unop($name, $op->first, $cx); | |
6e90668e | 1096 | } |
6e90668e SM |
1097 | } |
1098 | ||
1099 | sub pp_last { loopex(@_, "last") } | |
1100 | sub pp_next { loopex(@_, "next") } | |
1101 | sub pp_redo { loopex(@_, "redo") } | |
1102 | sub pp_goto { loopex(@_, "goto") } | |
1103 | sub pp_dump { loopex(@_, "dump") } | |
1104 | ||
1105 | sub ftst { | |
1106 | my $self = shift; | |
9d2c6865 | 1107 | my($op, $cx, $name) = @_; |
6e90668e | 1108 | if (class($op) eq "UNOP") { |
9d2c6865 SM |
1109 | # Genuine `-X' filetests are exempt from the LLAFR, but not |
1110 | # l?stat(); for the sake of clarity, give'em all parens | |
1111 | return $self->maybe_parens_unop($name, $op->first, $cx); | |
6e90668e | 1112 | } elsif (class($op) eq "GVOP") { |
9d2c6865 | 1113 | return $self->maybe_parens_func($name, $self->pp_gv($op, 1), $cx, 16); |
6e90668e | 1114 | } else { # I don't think baseop filetests ever survive ck_ftst, but... |
9d2c6865 | 1115 | return $name; |
6e90668e | 1116 | } |
6e90668e SM |
1117 | } |
1118 | ||
1119 | sub pp_lstat { ftst(@_, "lstat") } | |
1120 | sub pp_stat { ftst(@_, "stat") } | |
1121 | sub pp_ftrread { ftst(@_, "-R") } | |
1122 | sub pp_ftrwrite { ftst(@_, "-W") } | |
1123 | sub pp_ftrexec { ftst(@_, "-X") } | |
1124 | sub pp_fteread { ftst(@_, "-r") } | |
1125 | sub pp_ftewrite { ftst(@_, "-r") } | |
1126 | sub pp_fteexec { ftst(@_, "-r") } | |
1127 | sub pp_ftis { ftst(@_, "-e") } | |
1128 | sub pp_fteowned { ftst(@_, "-O") } | |
1129 | sub pp_ftrowned { ftst(@_, "-o") } | |
1130 | sub pp_ftzero { ftst(@_, "-z") } | |
1131 | sub pp_ftsize { ftst(@_, "-s") } | |
1132 | sub pp_ftmtime { ftst(@_, "-M") } | |
1133 | sub pp_ftatime { ftst(@_, "-A") } | |
1134 | sub pp_ftctime { ftst(@_, "-C") } | |
1135 | sub pp_ftsock { ftst(@_, "-S") } | |
1136 | sub pp_ftchr { ftst(@_, "-c") } | |
1137 | sub pp_ftblk { ftst(@_, "-b") } | |
1138 | sub pp_ftfile { ftst(@_, "-f") } | |
1139 | sub pp_ftdir { ftst(@_, "-d") } | |
1140 | sub pp_ftpipe { ftst(@_, "-p") } | |
1141 | sub pp_ftlink { ftst(@_, "-l") } | |
1142 | sub pp_ftsuid { ftst(@_, "-u") } | |
1143 | sub pp_ftsgid { ftst(@_, "-g") } | |
1144 | sub pp_ftsvtx { ftst(@_, "-k") } | |
1145 | sub pp_fttty { ftst(@_, "-t") } | |
1146 | sub pp_fttext { ftst(@_, "-T") } | |
1147 | sub pp_ftbinary { ftst(@_, "-B") } | |
1148 | ||
a798dbf2 | 1149 | sub SWAP_CHILDREN () { 1 } |
6e90668e SM |
1150 | sub ASSIGN () { 2 } # has OP= variant |
1151 | ||
9d2c6865 SM |
1152 | my(%left, %right); |
1153 | ||
1154 | sub assoc_class { | |
1155 | my $op = shift; | |
3f872cb9 GS |
1156 | my $name = $op->name; |
1157 | if ($name eq "concat" and $op->first->name eq "concat") { | |
9d2c6865 | 1158 | # avoid spurious `=' -- see comment in pp_concat |
3f872cb9 | 1159 | return "concat"; |
9d2c6865 | 1160 | } |
3f872cb9 GS |
1161 | if ($name eq "null" and class($op) eq "UNOP" |
1162 | and $op->first->name =~ /^(and|x?or)$/ | |
9d2c6865 SM |
1163 | and null $op->first->sibling) |
1164 | { | |
1165 | # Like all conditional constructs, OP_ANDs and OP_ORs are topped | |
1166 | # with a null that's used as the common end point of the two | |
1167 | # flows of control. For precedence purposes, ignore it. | |
1168 | # (COND_EXPRs have these too, but we don't bother with | |
1169 | # their associativity). | |
1170 | return assoc_class($op->first); | |
1171 | } | |
1172 | return $name . ($op->flags & OPf_STACKED ? "=" : ""); | |
1173 | } | |
1174 | ||
1175 | # Left associative operators, like `+', for which | |
1176 | # $a + $b + $c is equivalent to ($a + $b) + $c | |
1177 | ||
1178 | BEGIN { | |
3f872cb9 GS |
1179 | %left = ('multiply' => 19, 'i_multiply' => 19, |
1180 | 'divide' => 19, 'i_divide' => 19, | |
1181 | 'modulo' => 19, 'i_modulo' => 19, | |
1182 | 'repeat' => 19, | |
1183 | 'add' => 18, 'i_add' => 18, | |
1184 | 'subtract' => 18, 'i_subtract' => 18, | |
1185 | 'concat' => 18, | |
1186 | 'left_shift' => 17, 'right_shift' => 17, | |
1187 | 'bit_and' => 13, | |
1188 | 'bit_or' => 12, 'bit_xor' => 12, | |
1189 | 'and' => 3, | |
1190 | 'or' => 2, 'xor' => 2, | |
9d2c6865 SM |
1191 | ); |
1192 | } | |
1193 | ||
1194 | sub deparse_binop_left { | |
1195 | my $self = shift; | |
1196 | my($op, $left, $prec) = @_; | |
1197 | if ($left{assoc_class($op)} | |
1198 | and $left{assoc_class($op)} == $left{assoc_class($left)}) | |
1199 | { | |
1200 | return $self->deparse($left, $prec - .00001); | |
1201 | } else { | |
1202 | return $self->deparse($left, $prec); | |
1203 | } | |
1204 | } | |
1205 | ||
1206 | # Right associative operators, like `=', for which | |
1207 | # $a = $b = $c is equivalent to $a = ($b = $c) | |
1208 | ||
1209 | BEGIN { | |
3f872cb9 GS |
1210 | %right = ('pow' => 22, |
1211 | 'sassign=' => 7, 'aassign=' => 7, | |
1212 | 'multiply=' => 7, 'i_multiply=' => 7, | |
1213 | 'divide=' => 7, 'i_divide=' => 7, | |
1214 | 'modulo=' => 7, 'i_modulo=' => 7, | |
1215 | 'repeat=' => 7, | |
1216 | 'add=' => 7, 'i_add=' => 7, | |
1217 | 'subtract=' => 7, 'i_subtract=' => 7, | |
1218 | 'concat=' => 7, | |
1219 | 'left_shift=' => 7, 'right_shift=' => 7, | |
1220 | 'bit_and=' => 7, | |
1221 | 'bit_or=' => 7, 'bit_xor=' => 7, | |
1222 | 'andassign' => 7, | |
1223 | 'orassign' => 7, | |
9d2c6865 SM |
1224 | ); |
1225 | } | |
1226 | ||
1227 | sub deparse_binop_right { | |
1228 | my $self = shift; | |
1229 | my($op, $right, $prec) = @_; | |
1230 | if ($right{assoc_class($op)} | |
1231 | and $right{assoc_class($op)} == $right{assoc_class($right)}) | |
1232 | { | |
1233 | return $self->deparse($right, $prec - .00001); | |
1234 | } else { | |
1235 | return $self->deparse($right, $prec); | |
1236 | } | |
1237 | } | |
1238 | ||
a798dbf2 | 1239 | sub binop { |
6e90668e | 1240 | my $self = shift; |
9d2c6865 | 1241 | my ($op, $cx, $opname, $prec, $flags) = (@_, 0); |
a798dbf2 MB |
1242 | my $left = $op->first; |
1243 | my $right = $op->last; | |
9d2c6865 SM |
1244 | my $eq = ""; |
1245 | if ($op->flags & OPf_STACKED && $flags & ASSIGN) { | |
1246 | $eq = "="; | |
1247 | $prec = 7; | |
1248 | } | |
a798dbf2 MB |
1249 | if ($flags & SWAP_CHILDREN) { |
1250 | ($left, $right) = ($right, $left); | |
1251 | } | |
9d2c6865 SM |
1252 | $left = $self->deparse_binop_left($op, $left, $prec); |
1253 | $right = $self->deparse_binop_right($op, $right, $prec); | |
1254 | return $self->maybe_parens("$left $opname$eq $right", $cx, $prec); | |
1255 | } | |
1256 | ||
3ed82cfc GS |
1257 | sub pp_add { maybe_targmy(@_, \&binop, "+", 18, ASSIGN) } |
1258 | sub pp_multiply { maybe_targmy(@_, \&binop, "*", 19, ASSIGN) } | |
1259 | sub pp_subtract { maybe_targmy(@_, \&binop, "-",18, ASSIGN) } | |
1260 | sub pp_divide { maybe_targmy(@_, \&binop, "/", 19, ASSIGN) } | |
1261 | sub pp_modulo { maybe_targmy(@_, \&binop, "%", 19, ASSIGN) } | |
1262 | sub pp_i_add { maybe_targmy(@_, \&binop, "+", 18, ASSIGN) } | |
1263 | sub pp_i_multiply { maybe_targmy(@_, \&binop, "*", 19, ASSIGN) } | |
1264 | sub pp_i_subtract { maybe_targmy(@_, \&binop, "-", 18, ASSIGN) } | |
1265 | sub pp_i_divide { maybe_targmy(@_, \&binop, "/", 19, ASSIGN) } | |
1266 | sub pp_i_modulo { maybe_targmy(@_, \&binop, "%", 19, ASSIGN) } | |
1267 | sub pp_pow { maybe_targmy(@_, \&binop, "**", 22, ASSIGN) } | |
1268 | ||
1269 | sub pp_left_shift { maybe_targmy(@_, \&binop, "<<", 17, ASSIGN) } | |
1270 | sub pp_right_shift { maybe_targmy(@_, \&binop, ">>", 17, ASSIGN) } | |
1271 | sub pp_bit_and { maybe_targmy(@_, \&binop, "&", 13, ASSIGN) } | |
1272 | sub pp_bit_or { maybe_targmy(@_, \&binop, "|", 12, ASSIGN) } | |
1273 | sub pp_bit_xor { maybe_targmy(@_, \&binop, "^", 12, ASSIGN) } | |
9d2c6865 SM |
1274 | |
1275 | sub pp_eq { binop(@_, "==", 14) } | |
1276 | sub pp_ne { binop(@_, "!=", 14) } | |
1277 | sub pp_lt { binop(@_, "<", 15) } | |
1278 | sub pp_gt { binop(@_, ">", 15) } | |
1279 | sub pp_ge { binop(@_, ">=", 15) } | |
1280 | sub pp_le { binop(@_, "<=", 15) } | |
1281 | sub pp_ncmp { binop(@_, "<=>", 14) } | |
1282 | sub pp_i_eq { binop(@_, "==", 14) } | |
1283 | sub pp_i_ne { binop(@_, "!=", 14) } | |
1284 | sub pp_i_lt { binop(@_, "<", 15) } | |
1285 | sub pp_i_gt { binop(@_, ">", 15) } | |
1286 | sub pp_i_ge { binop(@_, ">=", 15) } | |
1287 | sub pp_i_le { binop(@_, "<=", 15) } | |
1288 | sub pp_i_ncmp { binop(@_, "<=>", 14) } | |
1289 | ||
1290 | sub pp_seq { binop(@_, "eq", 14) } | |
1291 | sub pp_sne { binop(@_, "ne", 14) } | |
1292 | sub pp_slt { binop(@_, "lt", 15) } | |
1293 | sub pp_sgt { binop(@_, "gt", 15) } | |
1294 | sub pp_sge { binop(@_, "ge", 15) } | |
1295 | sub pp_sle { binop(@_, "le", 15) } | |
1296 | sub pp_scmp { binop(@_, "cmp", 14) } | |
1297 | ||
1298 | sub pp_sassign { binop(@_, "=", 7, SWAP_CHILDREN) } | |
1299 | sub pp_aassign { binop(@_, "=", 7, SWAP_CHILDREN) } | |
6e90668e SM |
1300 | |
1301 | # `.' is special because concats-of-concats are optimized to save copying | |
1302 | # by making all but the first concat stacked. The effect is as if the | |
1303 | # programmer had written `($a . $b) .= $c', except legal. | |
3ed82cfc GS |
1304 | sub pp_concat { maybe_targmy(@_, \&real_concat) } |
1305 | sub real_concat { | |
6e90668e | 1306 | my $self = shift; |
9d2c6865 | 1307 | my($op, $cx) = @_; |
6e90668e SM |
1308 | my $left = $op->first; |
1309 | my $right = $op->last; | |
1310 | my $eq = ""; | |
9d2c6865 | 1311 | my $prec = 18; |
3f872cb9 | 1312 | if ($op->flags & OPf_STACKED and $op->first->name ne "concat") { |
6e90668e | 1313 | $eq = "="; |
9d2c6865 | 1314 | $prec = 7; |
6e90668e | 1315 | } |
9d2c6865 SM |
1316 | $left = $self->deparse_binop_left($op, $left, $prec); |
1317 | $right = $self->deparse_binop_right($op, $right, $prec); | |
1318 | return $self->maybe_parens("$left .$eq $right", $cx, $prec); | |
6e90668e SM |
1319 | } |
1320 | ||
1321 | # `x' is weird when the left arg is a list | |
1322 | sub pp_repeat { | |
1323 | my $self = shift; | |
9d2c6865 | 1324 | my($op, $cx) = @_; |
6e90668e SM |
1325 | my $left = $op->first; |
1326 | my $right = $op->last; | |
9d2c6865 SM |
1327 | my $eq = ""; |
1328 | my $prec = 19; | |
1329 | if ($op->flags & OPf_STACKED) { | |
1330 | $eq = "="; | |
1331 | $prec = 7; | |
1332 | } | |
6e90668e SM |
1333 | if (null($right)) { # list repeat; count is inside left-side ex-list |
1334 | my $kid = $left->first->sibling; # skip pushmark | |
1335 | my @exprs; | |
1336 | for (; !null($kid->sibling); $kid = $kid->sibling) { | |
9d2c6865 | 1337 | push @exprs, $self->deparse($kid, 6); |
6e90668e SM |
1338 | } |
1339 | $right = $kid; | |
1340 | $left = "(" . join(", ", @exprs). ")"; | |
1341 | } else { | |
9d2c6865 | 1342 | $left = $self->deparse_binop_left($op, $left, $prec); |
6e90668e | 1343 | } |
9d2c6865 SM |
1344 | $right = $self->deparse_binop_right($op, $right, $prec); |
1345 | return $self->maybe_parens("$left x$eq $right", $cx, $prec); | |
6e90668e SM |
1346 | } |
1347 | ||
1348 | sub range { | |
1349 | my $self = shift; | |
9d2c6865 | 1350 | my ($op, $cx, $type) = @_; |
6e90668e SM |
1351 | my $left = $op->first; |
1352 | my $right = $left->sibling; | |
9d2c6865 SM |
1353 | $left = $self->deparse($left, 9); |
1354 | $right = $self->deparse($right, 9); | |
1355 | return $self->maybe_parens("$left $type $right", $cx, 9); | |
6e90668e SM |
1356 | } |
1357 | ||
1358 | sub pp_flop { | |
1359 | my $self = shift; | |
9d2c6865 | 1360 | my($op, $cx) = @_; |
6e90668e SM |
1361 | my $flip = $op->first; |
1362 | my $type = ($flip->flags & OPf_SPECIAL) ? "..." : ".."; | |
9d2c6865 | 1363 | return $self->range($flip->first, $cx, $type); |
6e90668e SM |
1364 | } |
1365 | ||
1366 | # one-line while/until is handled in pp_leave | |
1367 | ||
1368 | sub logop { | |
1369 | my $self = shift; | |
9d2c6865 | 1370 | my ($op, $cx, $lowop, $lowprec, $highop, $highprec, $blockname) = @_; |
6e90668e SM |
1371 | my $left = $op->first; |
1372 | my $right = $op->first->sibling; | |
9d2c6865 SM |
1373 | if ($cx == 0 and is_scope($right) and $blockname) { # if ($a) {$b} |
1374 | $left = $self->deparse($left, 1); | |
1375 | $right = $self->deparse($right, 0); | |
1376 | return "$blockname ($left) {\n\t$right\n\b}\cK"; | |
1377 | } elsif ($cx == 0 and $blockname and not $self->{'parens'}) { # $b if $a | |
1378 | $right = $self->deparse($right, 1); | |
1379 | $left = $self->deparse($left, 1); | |
1380 | return "$right $blockname $left"; | |
1381 | } elsif ($cx > $lowprec and $highop) { # $a && $b | |
1382 | $left = $self->deparse_binop_left($op, $left, $highprec); | |
1383 | $right = $self->deparse_binop_right($op, $right, $highprec); | |
1384 | return $self->maybe_parens("$left $highop $right", $cx, $highprec); | |
1385 | } else { # $a and $b | |
1386 | $left = $self->deparse_binop_left($op, $left, $lowprec); | |
1387 | $right = $self->deparse_binop_right($op, $right, $lowprec); | |
1388 | return $self->maybe_parens("$left $lowop $right", $cx, $lowprec); | |
1389 | } | |
1390 | } | |
1391 | ||
1392 | sub pp_and { logop(@_, "and", 3, "&&", 11, "if") } | |
f4a44678 | 1393 | sub pp_or { logop(@_, "or", 2, "||", 10, "unless") } |
3ed82cfc GS |
1394 | |
1395 | # xor is syntactically a logop, but it's really a binop (contrary to | |
1396 | # old versions of opcode.pl). Syntax is what matters here. | |
9d2c6865 | 1397 | sub pp_xor { logop(@_, "xor", 2, "", 0, "") } |
6e90668e SM |
1398 | |
1399 | sub logassignop { | |
1400 | my $self = shift; | |
9d2c6865 | 1401 | my ($op, $cx, $opname) = @_; |
6e90668e SM |
1402 | my $left = $op->first; |
1403 | my $right = $op->first->sibling->first; # skip sassign | |
9d2c6865 SM |
1404 | $left = $self->deparse($left, 7); |
1405 | $right = $self->deparse($right, 7); | |
1406 | return $self->maybe_parens("$left $opname $right", $cx, 7); | |
a798dbf2 MB |
1407 | } |
1408 | ||
6e90668e SM |
1409 | sub pp_andassign { logassignop(@_, "&&=") } |
1410 | sub pp_orassign { logassignop(@_, "||=") } | |
1411 | ||
1412 | sub listop { | |
1413 | my $self = shift; | |
9d2c6865 SM |
1414 | my($op, $cx, $name) = @_; |
1415 | my(@exprs); | |
1416 | my $parens = ($cx >= 5) || $self->{'parens'}; | |
1417 | my $kid = $op->first->sibling; | |
1418 | return $name if null $kid; | |
1419 | my $first = $self->deparse($kid, 6); | |
1420 | $first = "+$first" if not $parens and substr($first, 0, 1) eq "("; | |
1421 | push @exprs, $first; | |
1422 | $kid = $kid->sibling; | |
1423 | for (; !null($kid); $kid = $kid->sibling) { | |
1424 | push @exprs, $self->deparse($kid, 6); | |
1425 | } | |
1426 | if ($parens) { | |
1427 | return "$name(" . join(", ", @exprs) . ")"; | |
1428 | } else { | |
1429 | return "$name " . join(", ", @exprs); | |
6e90668e | 1430 | } |
6e90668e | 1431 | } |
a798dbf2 | 1432 | |
6e90668e | 1433 | sub pp_bless { listop(@_, "bless") } |
3ed82cfc | 1434 | sub pp_atan2 { maybe_targmy(@_, \&listop, "atan2") } |
6e90668e SM |
1435 | sub pp_substr { maybe_local(@_, listop(@_, "substr")) } |
1436 | sub pp_vec { maybe_local(@_, listop(@_, "vec")) } | |
3ed82cfc GS |
1437 | sub pp_index { maybe_targmy(@_, \&listop, "index") } |
1438 | sub pp_rindex { maybe_targmy(@_, \&listop, "rindex") } | |
1439 | sub pp_sprintf { maybe_targmy(@_, \&listop, "sprintf") } | |
6e90668e | 1440 | sub pp_formline { listop(@_, "formline") } # see also deparse_format |
3ed82cfc | 1441 | sub pp_crypt { maybe_targmy(@_, \&listop, "crypt") } |
6e90668e SM |
1442 | sub pp_unpack { listop(@_, "unpack") } |
1443 | sub pp_pack { listop(@_, "pack") } | |
3ed82cfc | 1444 | sub pp_join { maybe_targmy(@_, \&listop, "join") } |
6e90668e | 1445 | sub pp_splice { listop(@_, "splice") } |
3ed82cfc GS |
1446 | sub pp_push { maybe_targmy(@_, \&listop, "push") } |
1447 | sub pp_unshift { maybe_targmy(@_, \&listop, "unshift") } | |
6e90668e SM |
1448 | sub pp_reverse { listop(@_, "reverse") } |
1449 | sub pp_warn { listop(@_, "warn") } | |
1450 | sub pp_die { listop(@_, "die") } | |
9d2c6865 SM |
1451 | # Actually, return is exempt from the LLAFR (see examples in this very |
1452 | # module!), but for consistency's sake, ignore that fact | |
6e90668e SM |
1453 | sub pp_return { listop(@_, "return") } |
1454 | sub pp_open { listop(@_, "open") } | |
1455 | sub pp_pipe_op { listop(@_, "pipe") } | |
1456 | sub pp_tie { listop(@_, "tie") } | |
1457 | sub pp_dbmopen { listop(@_, "dbmopen") } | |
1458 | sub pp_sselect { listop(@_, "select") } | |
1459 | sub pp_select { listop(@_, "select") } | |
1460 | sub pp_read { listop(@_, "read") } | |
1461 | sub pp_sysopen { listop(@_, "sysopen") } | |
1462 | sub pp_sysseek { listop(@_, "sysseek") } | |
1463 | sub pp_sysread { listop(@_, "sysread") } | |
1464 | sub pp_syswrite { listop(@_, "syswrite") } | |
1465 | sub pp_send { listop(@_, "send") } | |
1466 | sub pp_recv { listop(@_, "recv") } | |
1467 | sub pp_seek { listop(@_, "seek") } | |
6e90668e SM |
1468 | sub pp_fcntl { listop(@_, "fcntl") } |
1469 | sub pp_ioctl { listop(@_, "ioctl") } | |
3ed82cfc | 1470 | sub pp_flock { maybe_targmy(@_, \&listop, "flock") } |
6e90668e SM |
1471 | sub pp_socket { listop(@_, "socket") } |
1472 | sub pp_sockpair { listop(@_, "sockpair") } | |
1473 | sub pp_bind { listop(@_, "bind") } | |
1474 | sub pp_connect { listop(@_, "connect") } | |
1475 | sub pp_listen { listop(@_, "listen") } | |
1476 | sub pp_accept { listop(@_, "accept") } | |
1477 | sub pp_shutdown { listop(@_, "shutdown") } | |
1478 | sub pp_gsockopt { listop(@_, "getsockopt") } | |
1479 | sub pp_ssockopt { listop(@_, "setsockopt") } | |
3ed82cfc GS |
1480 | sub pp_chown { maybe_targmy(@_, \&listop, "chown") } |
1481 | sub pp_unlink { maybe_targmy(@_, \&listop, "unlink") } | |
1482 | sub pp_chmod { maybe_targmy(@_, \&listop, "chmod") } | |
1483 | sub pp_utime { maybe_targmy(@_, \&listop, "utime") } | |
1484 | sub pp_rename { maybe_targmy(@_, \&listop, "rename") } | |
1485 | sub pp_link { maybe_targmy(@_, \&listop, "link") } | |
1486 | sub pp_symlink { maybe_targmy(@_, \&listop, "symlink") } | |
1487 | sub pp_mkdir { maybe_targmy(@_, \&listop, "mkdir") } | |
6e90668e SM |
1488 | sub pp_open_dir { listop(@_, "opendir") } |
1489 | sub pp_seekdir { listop(@_, "seekdir") } | |
3ed82cfc GS |
1490 | sub pp_waitpid { maybe_targmy(@_, \&listop, "waitpid") } |
1491 | sub pp_system { maybe_targmy(@_, \&listop, "system") } | |
1492 | sub pp_exec { maybe_targmy(@_, \&listop, "exec") } | |
1493 | sub pp_kill { maybe_targmy(@_, \&listop, "kill") } | |
1494 | sub pp_setpgrp { maybe_targmy(@_, \&listop, "setpgrp") } | |
1495 | sub pp_getpriority { maybe_targmy(@_, \&listop, "getpriority") } | |
1496 | sub pp_setpriority { maybe_targmy(@_, \&listop, "setpriority") } | |
6e90668e SM |
1497 | sub pp_shmget { listop(@_, "shmget") } |
1498 | sub pp_shmctl { listop(@_, "shmctl") } | |
1499 | sub pp_shmread { listop(@_, "shmread") } | |
1500 | sub pp_shmwrite { listop(@_, "shmwrite") } | |
1501 | sub pp_msgget { listop(@_, "msgget") } | |
1502 | sub pp_msgctl { listop(@_, "msgctl") } | |
1503 | sub pp_msgsnd { listop(@_, "msgsnd") } | |
1504 | sub pp_msgrcv { listop(@_, "msgrcv") } | |
1505 | sub pp_semget { listop(@_, "semget") } | |
1506 | sub pp_semctl { listop(@_, "semctl") } | |
1507 | sub pp_semop { listop(@_, "semop") } | |
1508 | sub pp_ghbyaddr { listop(@_, "gethostbyaddr") } | |
1509 | sub pp_gnbyaddr { listop(@_, "getnetbyaddr") } | |
1510 | sub pp_gpbynumber { listop(@_, "getprotobynumber") } | |
1511 | sub pp_gsbyname { listop(@_, "getservbyname") } | |
1512 | sub pp_gsbyport { listop(@_, "getservbyport") } | |
1513 | sub pp_syscall { listop(@_, "syscall") } | |
1514 | ||
1515 | sub pp_glob { | |
1516 | my $self = shift; | |
9d2c6865 | 1517 | my($op, $cx) = @_; |
6e90668e SM |
1518 | my $text = $self->dq($op->first->sibling); # skip pushmark |
1519 | if ($text =~ /^\$?(\w|::|\`)+$/ # could look like a readline | |
1520 | or $text =~ /[<>]/) { | |
1521 | return 'glob(' . single_delim('qq', '"', $text) . ')'; | |
1522 | } else { | |
1523 | return '<' . $text . '>'; | |
1524 | } | |
1525 | } | |
1526 | ||
f5aa8f4e SM |
1527 | # Truncate is special because OPf_SPECIAL makes a bareword first arg |
1528 | # be a filehandle. This could probably be better fixed in the core | |
1529 | # by moving the GV lookup into ck_truc. | |
1530 | ||
1531 | sub pp_truncate { | |
1532 | my $self = shift; | |
1533 | my($op, $cx) = @_; | |
1534 | my(@exprs); | |
1535 | my $parens = ($cx >= 5) || $self->{'parens'}; | |
1536 | my $kid = $op->first->sibling; | |
acba1d67 | 1537 | my $fh; |
f5aa8f4e SM |
1538 | if ($op->flags & OPf_SPECIAL) { |
1539 | # $kid is an OP_CONST | |
1540 | $fh = $kid->sv->PV; | |
1541 | } else { | |
1542 | $fh = $self->deparse($kid, 6); | |
1543 | $fh = "+$fh" if not $parens and substr($fh, 0, 1) eq "("; | |
1544 | } | |
1545 | my $len = $self->deparse($kid->sibling, 6); | |
1546 | if ($parens) { | |
1547 | return "truncate($fh, $len)"; | |
1548 | } else { | |
1549 | return "truncate $fh, $len"; | |
1550 | } | |
f5aa8f4e SM |
1551 | } |
1552 | ||
6e90668e SM |
1553 | sub indirop { |
1554 | my $self = shift; | |
9d2c6865 | 1555 | my($op, $cx, $name) = @_; |
6e90668e SM |
1556 | my($expr, @exprs); |
1557 | my $kid = $op->first->sibling; | |
1558 | my $indir = ""; | |
1559 | if ($op->flags & OPf_STACKED) { | |
1560 | $indir = $kid; | |
1561 | $indir = $indir->first; # skip rv2gv | |
1562 | if (is_scope($indir)) { | |
9d2c6865 | 1563 | $indir = "{" . $self->deparse($indir, 0) . "}"; |
6e90668e | 1564 | } else { |
9d2c6865 | 1565 | $indir = $self->deparse($indir, 24); |
6e90668e SM |
1566 | } |
1567 | $indir = $indir . " "; | |
1568 | $kid = $kid->sibling; | |
1569 | } | |
1570 | for (; !null($kid); $kid = $kid->sibling) { | |
9d2c6865 | 1571 | $expr = $self->deparse($kid, 6); |
6e90668e SM |
1572 | push @exprs, $expr; |
1573 | } | |
3ed82cfc | 1574 | return $self->maybe_parens_func($name, $indir . join(", ", @exprs), |
9d2c6865 | 1575 | $cx, 5); |
6e90668e SM |
1576 | } |
1577 | ||
1578 | sub pp_prtf { indirop(@_, "printf") } | |
1579 | sub pp_print { indirop(@_, "print") } | |
1580 | sub pp_sort { indirop(@_, "sort") } | |
1581 | ||
1582 | sub mapop { | |
1583 | my $self = shift; | |
9d2c6865 | 1584 | my($op, $cx, $name) = @_; |
6e90668e SM |
1585 | my($expr, @exprs); |
1586 | my $kid = $op->first; # this is the (map|grep)start | |
1587 | $kid = $kid->first->sibling; # skip a pushmark | |
1588 | my $code = $kid->first; # skip a null | |
1589 | if (is_scope $code) { | |
f4a44678 | 1590 | $code = "{" . $self->deparse($code, 0) . "} "; |
6e90668e | 1591 | } else { |
9d2c6865 | 1592 | $code = $self->deparse($code, 24) . ", "; |
6e90668e SM |
1593 | } |
1594 | $kid = $kid->sibling; | |
1595 | for (; !null($kid); $kid = $kid->sibling) { | |
9d2c6865 | 1596 | $expr = $self->deparse($kid, 6); |
6e90668e SM |
1597 | push @exprs, $expr if $expr; |
1598 | } | |
9d2c6865 | 1599 | return $self->maybe_parens_func($name, $code . join(", ", @exprs), $cx, 5); |
6e90668e SM |
1600 | } |
1601 | ||
1602 | sub pp_mapwhile { mapop(@_, "map") } | |
1603 | sub pp_grepwhile { mapop(@_, "grep") } | |
1604 | ||
1605 | sub pp_list { | |
1606 | my $self = shift; | |
9d2c6865 | 1607 | my($op, $cx) = @_; |
6e90668e SM |
1608 | my($expr, @exprs); |
1609 | my $kid = $op->first->sibling; # skip pushmark | |
1610 | my $lop; | |
1611 | my $local = "either"; # could be local(...) or my(...) | |
1612 | for ($lop = $kid; !null($lop); $lop = $lop->sibling) { | |
1613 | # This assumes that no other private flags equal 128, and that | |
1614 | # OPs that store things other than flags in their op_private, | |
1615 | # like OP_AELEMFAST, won't be immediate children of a list. | |
3f872cb9 | 1616 | unless ($lop->private & OPpLVAL_INTRO or $lop->name eq "undef") |
6e90668e SM |
1617 | { |
1618 | $local = ""; # or not | |
1619 | last; | |
1620 | } | |
3f872cb9 | 1621 | if ($lop->name =~ /^pad[ash]v$/) { # my() |
6e90668e SM |
1622 | ($local = "", last) if $local eq "local"; |
1623 | $local = "my"; | |
3f872cb9 | 1624 | } elsif ($lop->name ne "undef") { # local() |
6e90668e SM |
1625 | ($local = "", last) if $local eq "my"; |
1626 | $local = "local"; | |
1627 | } | |
1628 | } | |
1629 | $local = "" if $local eq "either"; # no point if it's all undefs | |
f5aa8f4e | 1630 | return $self->deparse($kid, $cx) if null $kid->sibling and not $local; |
6e90668e SM |
1631 | for (; !null($kid); $kid = $kid->sibling) { |
1632 | if ($local) { | |
3f872cb9 | 1633 | if (class($kid) eq "UNOP" and $kid->first->name eq "gvsv") { |
6e90668e SM |
1634 | $lop = $kid->first; |
1635 | } else { | |
1636 | $lop = $kid; | |
1637 | } | |
1638 | $self->{'avoid_local'}{$$lop}++; | |
9d2c6865 | 1639 | $expr = $self->deparse($kid, 6); |
6e90668e SM |
1640 | delete $self->{'avoid_local'}{$$lop}; |
1641 | } else { | |
9d2c6865 | 1642 | $expr = $self->deparse($kid, 6); |
6e90668e SM |
1643 | } |
1644 | push @exprs, $expr; | |
1645 | } | |
9d2c6865 SM |
1646 | if ($local) { |
1647 | return "$local(" . join(", ", @exprs) . ")"; | |
1648 | } else { | |
1649 | return $self->maybe_parens( join(", ", @exprs), $cx, 6); | |
1650 | } | |
6e90668e SM |
1651 | } |
1652 | ||
1653 | sub pp_cond_expr { | |
1654 | my $self = shift; | |
9d2c6865 | 1655 | my($op, $cx) = @_; |
6e90668e SM |
1656 | my $cond = $op->first; |
1657 | my $true = $cond->sibling; | |
1658 | my $false = $true->sibling; | |
9d2c6865 | 1659 | my $cuddle = $self->{'cuddle'}; |
9d2c6865 | 1660 | unless ($cx == 0 and is_scope($true) and is_scope($false)) { |
f5aa8f4e | 1661 | $cond = $self->deparse($cond, 8); |
9d2c6865 SM |
1662 | $true = $self->deparse($true, 8); |
1663 | $false = $self->deparse($false, 8); | |
1664 | return $self->maybe_parens("$cond ? $true : $false", $cx, 8); | |
1665 | } | |
f5aa8f4e | 1666 | $cond = $self->deparse($cond, 1); |
9d2c6865 | 1667 | $true = $self->deparse($true, 0); |
3f872cb9 | 1668 | if ($false->name eq "lineseq") { # braces w/o scope => elsif |
6e90668e SM |
1669 | my $head = "if ($cond) {\n\t$true\n\b}"; |
1670 | my @elsifs; | |
3f872cb9 | 1671 | while (!null($false) and $false->name eq "lineseq") { |
6e90668e SM |
1672 | my $newop = $false->first->sibling->first; |
1673 | my $newcond = $newop->first; | |
1674 | my $newtrue = $newcond->sibling; | |
1675 | $false = $newtrue->sibling; # last in chain is OP_AND => no else | |
9d2c6865 SM |
1676 | $newcond = $self->deparse($newcond, 1); |
1677 | $newtrue = $self->deparse($newtrue, 0); | |
6e90668e SM |
1678 | push @elsifs, "elsif ($newcond) {\n\t$newtrue\n\b}"; |
1679 | } | |
1680 | if (!null($false)) { | |
9d2c6865 SM |
1681 | $false = $cuddle . "else {\n\t" . |
1682 | $self->deparse($false, 0) . "\n\b}\cK"; | |
6e90668e | 1683 | } else { |
9d2c6865 | 1684 | $false = "\cK"; |
6e90668e | 1685 | } |
9d2c6865 | 1686 | return $head . join($cuddle, "", @elsifs) . $false; |
6e90668e | 1687 | } |
9d2c6865 SM |
1688 | $false = $self->deparse($false, 0); |
1689 | return "if ($cond) {\n\t$true\n\b}${cuddle}else {\n\t$false\n\b}\cK"; | |
6e90668e SM |
1690 | } |
1691 | ||
1692 | sub pp_leaveloop { | |
1693 | my $self = shift; | |
9d2c6865 | 1694 | my($op, $cx) = @_; |
6e90668e SM |
1695 | my $enter = $op->first; |
1696 | my $kid = $enter->sibling; | |
1697 | local($self->{'curstash'}) = $self->{'curstash'}; | |
1698 | my $head = ""; | |
9d2c6865 | 1699 | my $bare = 0; |
3f872cb9 | 1700 | if ($kid->name eq "lineseq") { # bare or infinite loop |
6e90668e SM |
1701 | if (is_state $kid->last) { # infinite |
1702 | $head = "for (;;) "; # shorter than while (1) | |
9d2c6865 SM |
1703 | } else { |
1704 | $bare = 1; | |
6e90668e | 1705 | } |
3f872cb9 | 1706 | } elsif ($enter->name eq "enteriter") { # foreach |
6e90668e SM |
1707 | my $ary = $enter->first->sibling; # first was pushmark |
1708 | my $var = $ary->sibling; | |
f5aa8f4e SM |
1709 | if ($enter->flags & OPf_STACKED |
1710 | and not null $ary->first->sibling->sibling) | |
1711 | { | |
d7f5b6da SM |
1712 | $ary = $self->deparse($ary->first->sibling, 9) . " .. " . |
1713 | $self->deparse($ary->first->sibling->sibling, 9); | |
d8d95777 GA |
1714 | } else { |
1715 | $ary = $self->deparse($ary, 1); | |
1716 | } | |
6e90668e | 1717 | if (null $var) { |
f6f9bdb7 | 1718 | if ($enter->flags & OPf_SPECIAL) { # thread special var |
9d2c6865 | 1719 | $var = $self->pp_threadsv($enter, 1); |
f6f9bdb7 | 1720 | } else { # regular my() variable |
9d2c6865 | 1721 | $var = $self->pp_padsv($enter, 1); |
f6f9bdb7 SM |
1722 | if ($self->padname_sv($enter->targ)->IVX == |
1723 | $kid->first->first->sibling->last->cop_seq) | |
1724 | { | |
1725 | # If the scope of this variable closes at the last | |
1726 | # statement of the loop, it must have been | |
1727 | # declared here. | |
1728 | $var = "my " . $var; | |
1729 | } | |
6e90668e | 1730 | } |
3f872cb9 | 1731 | } elsif ($var->name eq "rv2gv") { |
9d2c6865 | 1732 | $var = $self->pp_rv2sv($var, 1); |
3f872cb9 | 1733 | } elsif ($var->name eq "gv") { |
9d2c6865 | 1734 | $var = "\$" . $self->deparse($var, 1); |
6e90668e | 1735 | } |
9d2c6865 | 1736 | $head = "foreach $var ($ary) "; |
6e90668e | 1737 | $kid = $kid->first->first->sibling; # skip OP_AND and OP_ITER |
3f872cb9 | 1738 | } elsif ($kid->name eq "null") { # while/until |
6e90668e | 1739 | $kid = $kid->first; |
3f872cb9 GS |
1740 | my $name = {"and" => "while", "or" => "until"} |
1741 | ->{$kid->name}; | |
9d2c6865 | 1742 | $head = "$name (" . $self->deparse($kid->first, 1) . ") "; |
6e90668e | 1743 | $kid = $kid->first->sibling; |
3f872cb9 | 1744 | } elsif ($kid->name eq "stub") { # bare and empty |
9d2c6865 | 1745 | return "{;}"; # {} could be a hashref |
6e90668e SM |
1746 | } |
1747 | # The third-to-last kid is the continue block if the pointer used | |
9d2c6865 SM |
1748 | # by `next BLOCK' points to its first OP, which happens to be the |
1749 | # the op_next of the head of the _previous_ statement. | |
1750 | # Unless it's a bare loop, in which case it's last, since there's | |
1751 | # no unstack or extra nextstate. | |
f5aa8f4e SM |
1752 | # Except if the previous head isn't null but the first kid is |
1753 | # (because it's a nulled out nextstate in a scope), in which | |
1754 | # case the head's next is advanced past the null but the nextop's | |
1755 | # isn't, so we need to try nextop->next. | |
bd0865ec GS |
1756 | my $precont; |
1757 | my $cont = $kid->first; | |
9d2c6865 | 1758 | if ($bare) { |
9d2c6865 SM |
1759 | while (!null($cont->sibling)) { |
1760 | $precont = $cont; | |
1761 | $cont = $cont->sibling; | |
1762 | } | |
1763 | } else { | |
9d2c6865 SM |
1764 | while (!null($cont->sibling->sibling->sibling)) { |
1765 | $precont = $cont; | |
1766 | $cont = $cont->sibling; | |
6e90668e SM |
1767 | } |
1768 | } | |
f5aa8f4e SM |
1769 | if ($precont and $ {$precont->next} == $ {$enter->nextop} |
1770 | || $ {$precont->next} == $ {$enter->nextop->next} ) | |
1771 | { | |
1772 | my $state = $kid->first; | |
1773 | my $cuddle = $self->{'cuddle'}; | |
1774 | my($expr, @exprs); | |
1775 | for (; $$state != $$cont; $state = $state->sibling) { | |
1776 | $expr = ""; | |
1777 | if (is_state $state) { | |
1778 | $expr = $self->deparse($state, 0); | |
1779 | $state = $state->sibling; | |
1780 | last if null $kid; | |
1781 | } | |
1782 | $expr .= $self->deparse($state, 0); | |
1783 | push @exprs, $expr if $expr; | |
1784 | } | |
1785 | $kid = join(";\n", @exprs); | |
1786 | $cont = $cuddle . "continue {\n\t" . | |
1787 | $self->deparse($cont, 0) . "\n\b}\cK"; | |
6e90668e | 1788 | } else { |
9d2c6865 SM |
1789 | $cont = "\cK"; |
1790 | $kid = $self->deparse($kid, 0); | |
6e90668e SM |
1791 | } |
1792 | return $head . "{\n\t" . $kid . "\n\b}" . $cont; | |
1793 | } | |
1794 | ||
1795 | sub pp_leavetry { | |
1796 | my $self = shift; | |
9d2c6865 | 1797 | return "eval {\n\t" . $self->pp_leave(@_) . "\n\b}"; |
bd0865ec | 1798 | } |
6e90668e | 1799 | |
bd0865ec GS |
1800 | BEGIN { eval "sub OP_CONST () {" . opnumber("const") . "}" } |
1801 | BEGIN { eval "sub OP_STRINGIFY () {" . opnumber("stringify") . "}" } | |
f5aa8f4e | 1802 | |
a798dbf2 | 1803 | sub pp_null { |
6e90668e | 1804 | my $self = shift; |
9d2c6865 | 1805 | my($op, $cx) = @_; |
6e90668e | 1806 | if (class($op) eq "OP") { |
f4a44678 SM |
1807 | # old value is lost |
1808 | return $self->{'ex_const'} if $op->targ == OP_CONST; | |
3f872cb9 | 1809 | } elsif ($op->first->name eq "pushmark") { |
9d2c6865 | 1810 | return $self->pp_list($op, $cx); |
3f872cb9 | 1811 | } elsif ($op->first->name eq "enter") { |
9d2c6865 | 1812 | return $self->pp_leave($op, $cx); |
bd0865ec | 1813 | } elsif ($op->targ == OP_STRINGIFY) { |
6e90668e SM |
1814 | return $self->dquote($op); |
1815 | } elsif (!null($op->first->sibling) and | |
3f872cb9 | 1816 | $op->first->sibling->name eq "readline" and |
6e90668e | 1817 | $op->first->sibling->flags & OPf_STACKED) { |
9d2c6865 SM |
1818 | return $self->maybe_parens($self->deparse($op->first, 7) . " = " |
1819 | . $self->deparse($op->first->sibling, 7), | |
1820 | $cx, 7); | |
6e90668e | 1821 | } elsif (!null($op->first->sibling) and |
3f872cb9 | 1822 | $op->first->sibling->name eq "trans" and |
6e90668e | 1823 | $op->first->sibling->flags & OPf_STACKED) { |
9d2c6865 SM |
1824 | return $self->maybe_parens($self->deparse($op->first, 20) . " =~ " |
1825 | . $self->deparse($op->first->sibling, 20), | |
1826 | $cx, 20); | |
6e90668e | 1827 | } else { |
9d2c6865 | 1828 | return $self->deparse($op->first, $cx); |
6e90668e | 1829 | } |
a798dbf2 MB |
1830 | } |
1831 | ||
bd0865ec GS |
1832 | # the aassign in-common check messes up SvCUR (always setting it |
1833 | # to a value >= 100), but it's probably safe to assume there | |
1834 | # won't be any NULs in the names of my() variables. (with | |
1835 | # stash variables, I wouldn't be so sure) | |
1836 | sub padname_fix { | |
1837 | my $str = shift; | |
1838 | $str = substr($str, 0, index($str, "\0")) if index($str, "\0") != -1; | |
1839 | return $str; | |
1840 | } | |
1841 | ||
6e90668e SM |
1842 | sub padname { |
1843 | my $self = shift; | |
1844 | my $targ = shift; | |
1845 | my $str = $self->padname_sv($targ)->PV; | |
1846 | return padname_fix($str); | |
1847 | } | |
1848 | ||
1849 | sub padany { | |
1850 | my $self = shift; | |
1851 | my $op = shift; | |
1852 | return substr($self->padname($op->targ), 1); # skip $/@/% | |
1853 | } | |
1854 | ||
1855 | sub pp_padsv { | |
1856 | my $self = shift; | |
9d2c6865 SM |
1857 | my($op, $cx) = @_; |
1858 | return $self->maybe_my($op, $cx, $self->padname($op->targ)); | |
6e90668e SM |
1859 | } |
1860 | ||
1861 | sub pp_padav { pp_padsv(@_) } | |
1862 | sub pp_padhv { pp_padsv(@_) } | |
1863 | ||
9d2c6865 SM |
1864 | my @threadsv_names; |
1865 | ||
1866 | BEGIN { | |
1867 | @threadsv_names = ("_", "1", "2", "3", "4", "5", "6", "7", "8", "9", | |
1868 | "&", "`", "'", "+", "/", ".", ",", "\\", '"', ";", | |
1869 | "^", "-", "%", "=", "|", "~", ":", "^A", "^E", | |
1870 | "!", "@"); | |
1871 | } | |
f6f9bdb7 SM |
1872 | |
1873 | sub pp_threadsv { | |
1874 | my $self = shift; | |
9d2c6865 SM |
1875 | my($op, $cx) = @_; |
1876 | return $self->maybe_local($op, $cx, "\$" . $threadsv_names[$op->targ]); | |
f6f9bdb7 SM |
1877 | } |
1878 | ||
6e90668e SM |
1879 | sub pp_gvsv { |
1880 | my $self = shift; | |
9d2c6865 SM |
1881 | my($op, $cx) = @_; |
1882 | return $self->maybe_local($op, $cx, "\$" . $self->gv_name($op->gv)); | |
6e90668e SM |
1883 | } |
1884 | ||
1885 | sub pp_gv { | |
1886 | my $self = shift; | |
9d2c6865 | 1887 | my($op, $cx) = @_; |
6e90668e SM |
1888 | return $self->gv_name($op->gv); |
1889 | } | |
1890 | ||
1891 | sub pp_aelemfast { | |
1892 | my $self = shift; | |
9d2c6865 | 1893 | my($op, $cx) = @_; |
6e90668e SM |
1894 | my $gv = $op->gv; |
1895 | return "\$" . $self->gv_name($gv) . "[" . $op->private . "]"; | |
1896 | } | |
1897 | ||
1898 | sub rv2x { | |
1899 | my $self = shift; | |
9d2c6865 | 1900 | my($op, $cx, $type) = @_; |
6e90668e | 1901 | my $kid = $op->first; |
f5aa8f4e SM |
1902 | my $str = $self->deparse($kid, 0); |
1903 | return $type . (is_scalar($kid) ? $str : "{$str}"); | |
6e90668e SM |
1904 | } |
1905 | ||
1906 | sub pp_rv2sv { maybe_local(@_, rv2x(@_, "\$")) } | |
1907 | sub pp_rv2hv { maybe_local(@_, rv2x(@_, "%")) } | |
1908 | sub pp_rv2gv { maybe_local(@_, rv2x(@_, "*")) } | |
1909 | ||
1910 | # skip rv2av | |
1911 | sub pp_av2arylen { | |
1912 | my $self = shift; | |
9d2c6865 | 1913 | my($op, $cx) = @_; |
3f872cb9 | 1914 | if ($op->first->name eq "padav") { |
9d2c6865 | 1915 | return $self->maybe_local($op, $cx, '$#' . $self->padany($op->first)); |
6e90668e | 1916 | } else { |
f5aa8f4e SM |
1917 | return $self->maybe_local($op, $cx, |
1918 | $self->rv2x($op->first, $cx, '$#')); | |
6e90668e SM |
1919 | } |
1920 | } | |
1921 | ||
1922 | # skip down to the old, ex-rv2cv | |
9d2c6865 | 1923 | sub pp_rv2cv { $_[0]->rv2x($_[1]->first->first->sibling, $_[2], "&") } |
6e90668e SM |
1924 | |
1925 | sub pp_rv2av { | |
1926 | my $self = shift; | |
9d2c6865 | 1927 | my($op, $cx) = @_; |
6e90668e | 1928 | my $kid = $op->first; |
3f872cb9 | 1929 | if ($kid->name eq "const") { # constant list |
6e90668e SM |
1930 | my $av = $kid->sv; |
1931 | return "(" . join(", ", map(const($_), $av->ARRAY)) . ")"; | |
1932 | } else { | |
9d2c6865 | 1933 | return $self->maybe_local($op, $cx, $self->rv2x($op, $cx, "\@")); |
6e90668e SM |
1934 | } |
1935 | } | |
1936 | ||
3ed82cfc GS |
1937 | sub is_subscriptable { |
1938 | my $op = shift; | |
1939 | if ($op->name =~ /^[ahg]elem/) { | |
1940 | return 1; | |
1941 | } elsif ($op->name eq "entersub") { | |
1942 | my $kid = $op->first; | |
1943 | return 0 unless null $kid->sibling; | |
1944 | $kid = $kid->first; | |
1945 | $kid = $kid->sibling until null $kid->sibling; | |
1946 | return 0 if is_scope($kid); | |
1947 | $kid = $kid->first; | |
1948 | return 0 if $kid->name eq "gv"; | |
1949 | return 0 if is_scalar($kid); | |
1950 | return is_subscriptable($kid); | |
1951 | } else { | |
1952 | return 0; | |
1953 | } | |
1954 | } | |
6e90668e SM |
1955 | |
1956 | sub elem { | |
1957 | my $self = shift; | |
9d2c6865 | 1958 | my ($op, $cx, $left, $right, $padname) = @_; |
6e90668e | 1959 | my($array, $idx) = ($op->first, $op->first->sibling); |
3f872cb9 | 1960 | unless ($array->name eq $padname) { # Maybe this has been fixed |
6e90668e SM |
1961 | $array = $array->first; # skip rv2av (or ex-rv2av in _53+) |
1962 | } | |
3f872cb9 | 1963 | if ($array->name eq $padname) { |
6e90668e SM |
1964 | $array = $self->padany($array); |
1965 | } elsif (is_scope($array)) { # ${expr}[0] | |
9d2c6865 | 1966 | $array = "{" . $self->deparse($array, 0) . "}"; |
6e90668e | 1967 | } elsif (is_scalar $array) { # $x[0], $$x[0], ... |
9d2c6865 | 1968 | $array = $self->deparse($array, 24); |
6e90668e SM |
1969 | } else { |
1970 | # $x[20][3]{hi} or expr->[20] | |
3ed82cfc | 1971 | my $arrow = is_subscriptable($array) ? "" : "->"; |
9d2c6865 SM |
1972 | return $self->deparse($array, 24) . $arrow . |
1973 | $left . $self->deparse($idx, 1) . $right; | |
6e90668e | 1974 | } |
9d2c6865 | 1975 | $idx = $self->deparse($idx, 1); |
6e90668e SM |
1976 | return "\$" . $array . $left . $idx . $right; |
1977 | } | |
1978 | ||
3f872cb9 GS |
1979 | sub pp_aelem { maybe_local(@_, elem(@_, "[", "]", "padav")) } |
1980 | sub pp_helem { maybe_local(@_, elem(@_, "{", "}", "padhv")) } | |
6e90668e SM |
1981 | |
1982 | sub pp_gelem { | |
1983 | my $self = shift; | |
9d2c6865 | 1984 | my($op, $cx) = @_; |
6e90668e SM |
1985 | my($glob, $part) = ($op->first, $op->last); |
1986 | $glob = $glob->first; # skip rv2gv | |
3f872cb9 | 1987 | $glob = $glob->first if $glob->name eq "rv2gv"; # this one's a bug |
9d2c6865 SM |
1988 | my $scope = is_scope($glob); |
1989 | $glob = $self->deparse($glob, 0); | |
1990 | $part = $self->deparse($part, 1); | |
6e90668e SM |
1991 | return "*" . ($scope ? "{$glob}" : $glob) . "{$part}"; |
1992 | } | |
1993 | ||
1994 | sub slice { | |
1995 | my $self = shift; | |
9d2c6865 | 1996 | my ($op, $cx, $left, $right, $regname, $padname) = @_; |
6e90668e SM |
1997 | my $last; |
1998 | my(@elems, $kid, $array, $list); | |
1999 | if (class($op) eq "LISTOP") { | |
2000 | $last = $op->last; | |
2001 | } else { # ex-hslice inside delete() | |
2002 | for ($kid = $op->first; !null $kid->sibling; $kid = $kid->sibling) {} | |
2003 | $last = $kid; | |
2004 | } | |
2005 | $array = $last; | |
2006 | $array = $array->first | |
3f872cb9 | 2007 | if $array->name eq $regname or $array->name eq "null"; |
6e90668e | 2008 | if (is_scope($array)) { |
9d2c6865 | 2009 | $array = "{" . $self->deparse($array, 0) . "}"; |
3f872cb9 | 2010 | } elsif ($array->name eq $padname) { |
6e90668e SM |
2011 | $array = $self->padany($array); |
2012 | } else { | |
9d2c6865 | 2013 | $array = $self->deparse($array, 24); |
6e90668e SM |
2014 | } |
2015 | $kid = $op->first->sibling; # skip pushmark | |
3f872cb9 | 2016 | if ($kid->name eq "list") { |
6e90668e SM |
2017 | $kid = $kid->first->sibling; # skip list, pushmark |
2018 | for (; !null $kid; $kid = $kid->sibling) { | |
9d2c6865 | 2019 | push @elems, $self->deparse($kid, 6); |
6e90668e SM |
2020 | } |
2021 | $list = join(", ", @elems); | |
2022 | } else { | |
9d2c6865 | 2023 | $list = $self->deparse($kid, 1); |
6e90668e SM |
2024 | } |
2025 | return "\@" . $array . $left . $list . $right; | |
2026 | } | |
2027 | ||
3ed82cfc GS |
2028 | sub pp_aslice { maybe_local(@_, slice(@_, "[", "]", "rv2av", "padav")) } |
2029 | sub pp_hslice { maybe_local(@_, slice(@_, "{", "}", "rv2hv", "padhv")) } | |
6e90668e SM |
2030 | |
2031 | sub pp_lslice { | |
2032 | my $self = shift; | |
9d2c6865 | 2033 | my($op, $cx) = @_; |
6e90668e SM |
2034 | my $idx = $op->first; |
2035 | my $list = $op->last; | |
2036 | my(@elems, $kid); | |
9d2c6865 SM |
2037 | $list = $self->deparse($list, 1); |
2038 | $idx = $self->deparse($idx, 1); | |
2039 | return "($list)" . "[$idx]"; | |
6e90668e SM |
2040 | } |
2041 | ||
6e90668e SM |
2042 | sub want_scalar { |
2043 | my $op = shift; | |
2044 | return ($op->flags & OPf_WANT) == OPf_WANT_SCALAR; | |
2045 | } | |
2046 | ||
bd0865ec GS |
2047 | sub want_list { |
2048 | my $op = shift; | |
2049 | return ($op->flags & OPf_WANT) == OPf_WANT_LIST; | |
2050 | } | |
2051 | ||
2052 | sub method { | |
6e90668e | 2053 | my $self = shift; |
9d2c6865 | 2054 | my($op, $cx) = @_; |
bd0865ec GS |
2055 | my $kid = $op->first->sibling; # skip pushmark |
2056 | my($meth, $obj, @exprs); | |
3f872cb9 | 2057 | if ($kid->name eq "list" and want_list $kid) { |
bd0865ec GS |
2058 | # When an indirect object isn't a bareword but the args are in |
2059 | # parens, the parens aren't part of the method syntax (the LLAFR | |
2060 | # doesn't apply), but they make a list with OPf_PARENS set that | |
2061 | # doesn't get flattened by the append_elem that adds the method, | |
2062 | # making a (object, arg1, arg2, ...) list where the object | |
2063 | # usually is. This can be distinguished from | |
2064 | # `($obj, $arg1, $arg2)->meth()' (which is legal if $arg2 is an | |
2065 | # object) because in the later the list is in scalar context | |
2066 | # as the left side of -> always is, while in the former | |
2067 | # the list is in list context as method arguments always are. | |
2068 | # (Good thing there aren't method prototypes!) | |
3ed82cfc | 2069 | $meth = $kid->sibling; |
bd0865ec GS |
2070 | $kid = $kid->first->sibling; # skip pushmark |
2071 | $obj = $kid; | |
6e90668e | 2072 | $kid = $kid->sibling; |
bd0865ec | 2073 | for (; not null $kid; $kid = $kid->sibling) { |
9d2c6865 | 2074 | push @exprs, $self->deparse($kid, 6); |
6e90668e | 2075 | } |
bd0865ec GS |
2076 | } else { |
2077 | $obj = $kid; | |
2078 | $kid = $kid->sibling; | |
2079 | for (; not null $kid->sibling; $kid = $kid->sibling) { | |
2080 | push @exprs, $self->deparse($kid, 6); | |
6e90668e | 2081 | } |
3ed82cfc | 2082 | $meth = $kid; |
bd0865ec GS |
2083 | } |
2084 | $obj = $self->deparse($obj, 24); | |
3ed82cfc GS |
2085 | if ($meth->name eq "method_named") { |
2086 | $meth = $meth->sv->PV; | |
bd0865ec | 2087 | } else { |
3ed82cfc GS |
2088 | $meth = $meth->first; |
2089 | if ($meth->name eq "const") { | |
2090 | # As of 5.005_58, this case is probably obsoleted by the | |
2091 | # method_named case above | |
2092 | $meth = $meth->sv->PV; # needs to be bare | |
2093 | } else { | |
2094 | $meth = $self->deparse($meth, 1); | |
2095 | } | |
bd0865ec GS |
2096 | } |
2097 | my $args = join(", ", @exprs); | |
2098 | $kid = $obj . "->" . $meth; | |
2099 | if ($args) { | |
2100 | return $kid . "(" . $args . ")"; # parens mandatory | |
2101 | } else { | |
2102 | return $kid; | |
2103 | } | |
2104 | } | |
2105 | ||
2106 | # returns "&" if the prototype doesn't match the args, | |
2107 | # or ("", $args_after_prototype_demunging) if it does. | |
2108 | sub check_proto { | |
2109 | my $self = shift; | |
2110 | my($proto, @args) = @_; | |
2111 | my($arg, $real); | |
2112 | my $doneok = 0; | |
2113 | my @reals; | |
2114 | # An unbackslashed @ or % gobbles up the rest of the args | |
2115 | $proto =~ s/([^\\]|^)([@%])(.*)$/$1$2/; | |
2116 | while ($proto) { | |
2117 | $proto =~ s/^ *([\\]?[\$\@&%*]|;)//; | |
2118 | my $chr = $1; | |
2119 | if ($chr eq "") { | |
2120 | return "&" if @args; | |
2121 | } elsif ($chr eq ";") { | |
2122 | $doneok = 1; | |
2123 | } elsif ($chr eq "@" or $chr eq "%") { | |
2124 | push @reals, map($self->deparse($_, 6), @args); | |
2125 | @args = (); | |
6e90668e | 2126 | } else { |
bd0865ec GS |
2127 | $arg = shift @args; |
2128 | last unless $arg; | |
2129 | if ($chr eq "\$") { | |
2130 | if (want_scalar $arg) { | |
2131 | push @reals, $self->deparse($arg, 6); | |
2132 | } else { | |
2133 | return "&"; | |
2134 | } | |
2135 | } elsif ($chr eq "&") { | |
3f872cb9 | 2136 | if ($arg->name =~ /^(s?refgen|undef)$/) { |
bd0865ec GS |
2137 | push @reals, $self->deparse($arg, 6); |
2138 | } else { | |
2139 | return "&"; | |
2140 | } | |
2141 | } elsif ($chr eq "*") { | |
3f872cb9 GS |
2142 | if ($arg->name =~ /^s?refgen$/ |
2143 | and $arg->first->first->name eq "rv2gv") | |
bd0865ec GS |
2144 | { |
2145 | $real = $arg->first->first; # skip refgen, null | |
3f872cb9 | 2146 | if ($real->first->name eq "gv") { |
bd0865ec GS |
2147 | push @reals, $self->deparse($real, 6); |
2148 | } else { | |
2149 | push @reals, $self->deparse($real->first, 6); | |
2150 | } | |
2151 | } else { | |
2152 | return "&"; | |
2153 | } | |
2154 | } elsif (substr($chr, 0, 1) eq "\\") { | |
2155 | $chr = substr($chr, 1); | |
3f872cb9 | 2156 | if ($arg->name =~ /^s?refgen$/ and |
bd0865ec GS |
2157 | !null($real = $arg->first) and |
2158 | ($chr eq "\$" && is_scalar($real->first) | |
2159 | or ($chr eq "\@" | |
3f872cb9 GS |
2160 | && $real->first->sibling->name |
2161 | =~ /^(rv2|pad)av$/) | |
bd0865ec | 2162 | or ($chr eq "%" |
3f872cb9 GS |
2163 | && $real->first->sibling->name |
2164 | =~ /^(rv2|pad)hv$/) | |
bd0865ec | 2165 | #or ($chr eq "&" # This doesn't work |
3f872cb9 | 2166 | # && $real->first->name eq "rv2cv") |
bd0865ec | 2167 | or ($chr eq "*" |
3f872cb9 | 2168 | && $real->first->name eq "rv2gv"))) |
bd0865ec GS |
2169 | { |
2170 | push @reals, $self->deparse($real, 6); | |
2171 | } else { | |
2172 | return "&"; | |
2173 | } | |
2174 | } | |
2175 | } | |
9d2c6865 | 2176 | } |
bd0865ec GS |
2177 | return "&" if $proto and !$doneok; # too few args and no `;' |
2178 | return "&" if @args; # too many args | |
2179 | return ("", join ", ", @reals); | |
2180 | } | |
2181 | ||
2182 | sub pp_entersub { | |
2183 | my $self = shift; | |
2184 | my($op, $cx) = @_; | |
2185 | return $self->method($op, $cx) unless null $op->first->sibling; | |
2186 | my $prefix = ""; | |
2187 | my $amper = ""; | |
2188 | my($kid, @exprs); | |
9d2c6865 SM |
2189 | if ($op->flags & OPf_SPECIAL) { |
2190 | $prefix = "do "; | |
2191 | } elsif ($op->private & OPpENTERSUB_AMPER) { | |
2192 | $amper = "&"; | |
2193 | } | |
2194 | $kid = $op->first; | |
2195 | $kid = $kid->first->sibling; # skip ex-list, pushmark | |
2196 | for (; not null $kid->sibling; $kid = $kid->sibling) { | |
2197 | push @exprs, $kid; | |
2198 | } | |
bd0865ec GS |
2199 | my $simple = 0; |
2200 | my $proto = undef; | |
9d2c6865 SM |
2201 | if (is_scope($kid)) { |
2202 | $amper = "&"; | |
2203 | $kid = "{" . $self->deparse($kid, 0) . "}"; | |
3f872cb9 | 2204 | } elsif ($kid->first->name eq "gv") { |
9d2c6865 SM |
2205 | my $gv = $kid->first->gv; |
2206 | if (class($gv->CV) ne "SPECIAL") { | |
2207 | $proto = $gv->CV->PV if $gv->CV->FLAGS & SVf_POK; | |
2208 | } | |
bd0865ec | 2209 | $simple = 1; # only calls of named functions can be prototyped |
9d2c6865 SM |
2210 | $kid = $self->deparse($kid, 24); |
2211 | } elsif (is_scalar $kid->first) { | |
2212 | $amper = "&"; | |
2213 | $kid = $self->deparse($kid, 24); | |
2214 | } else { | |
2215 | $prefix = ""; | |
3ed82cfc GS |
2216 | my $arrow = is_subscriptable($kid->first) ? "" : "->"; |
2217 | $kid = $self->deparse($kid, 24) . $arrow; | |
9d2c6865 | 2218 | } |
bd0865ec | 2219 | my $args; |
9d2c6865 | 2220 | if (defined $proto and not $amper) { |
bd0865ec GS |
2221 | ($amper, $args) = $self->check_proto($proto, @exprs); |
2222 | if ($amper eq "&") { | |
9d2c6865 SM |
2223 | $args = join(", ", map($self->deparse($_, 6), @exprs)); |
2224 | } | |
2225 | } else { | |
2226 | $args = join(", ", map($self->deparse($_, 6), @exprs)); | |
6e90668e | 2227 | } |
9d2c6865 SM |
2228 | if ($prefix or $amper) { |
2229 | if ($op->flags & OPf_STACKED) { | |
2230 | return $prefix . $amper . $kid . "(" . $args . ")"; | |
2231 | } else { | |
2232 | return $prefix . $amper. $kid; | |
2233 | } | |
6e90668e | 2234 | } else { |
9d2c6865 SM |
2235 | if (defined $proto and $proto eq "") { |
2236 | return $kid; | |
2237 | } elsif ($proto eq "\$") { | |
2238 | return $self->maybe_parens_func($kid, $args, $cx, 16); | |
2239 | } elsif ($proto or $simple) { | |
2240 | return $self->maybe_parens_func($kid, $args, $cx, 5); | |
2241 | } else { | |
2242 | return "$kid(" . $args . ")"; | |
2243 | } | |
6e90668e SM |
2244 | } |
2245 | } | |
2246 | ||
2247 | sub pp_enterwrite { unop(@_, "write") } | |
2248 | ||
2249 | # escape things that cause interpolation in double quotes, | |
2250 | # but not character escapes | |
2251 | sub uninterp { | |
2252 | my($str) = @_; | |
9d2c6865 SM |
2253 | $str =~ s/(^|[^\\])([\$\@]|\\[uUlLQE])/$1\\$2/g; |
2254 | return $str; | |
2255 | } | |
2256 | ||
2257 | # the same, but treat $|, $), and $ at the end of the string differently | |
2258 | sub re_uninterp { | |
2259 | my($str) = @_; | |
2260 | $str =~ s/(^|[^\\])(\@|\\[uUlLQE])/$1\\$2/g; | |
2261 | $str =~ s/(^|[^\\])(\$[^)|])/$1\\$2/g; | |
6e90668e SM |
2262 | return $str; |
2263 | } | |
2264 | ||
2265 | # character escapes, but not delimiters that might need to be escaped | |
2266 | sub escape_str { # ASCII | |
2267 | my($str) = @_; | |
6e90668e SM |
2268 | $str =~ s/\a/\\a/g; |
2269 | # $str =~ s/\cH/\\b/g; # \b means someting different in a regex | |
2270 | $str =~ s/\t/\\t/g; | |
2271 | $str =~ s/\n/\\n/g; | |
2272 | $str =~ s/\e/\\e/g; | |
2273 | $str =~ s/\f/\\f/g; | |
2274 | $str =~ s/\r/\\r/g; | |
2275 | $str =~ s/([\cA-\cZ])/'\\c' . chr(ord('@') + ord($1))/ge; | |
2276 | $str =~ s/([\0\033-\037\177-\377])/'\\' . sprintf("%03o", ord($1))/ge; | |
2277 | return $str; | |
2278 | } | |
2279 | ||
9d2c6865 SM |
2280 | # Don't do this for regexen |
2281 | sub unback { | |
2282 | my($str) = @_; | |
2283 | $str =~ s/\\/\\\\/g; | |
2284 | return $str; | |
2285 | } | |
2286 | ||
6e90668e SM |
2287 | sub balanced_delim { |
2288 | my($str) = @_; | |
2289 | my @str = split //, $str; | |
2290 | my($ar, $open, $close, $fail, $c, $cnt); | |
2291 | for $ar (['[',']'], ['(',')'], ['<','>'], ['{','}']) { | |
2292 | ($open, $close) = @$ar; | |
2293 | $fail = 0; $cnt = 0; | |
2294 | for $c (@str) { | |
2295 | if ($c eq $open) { | |
2296 | $cnt++; | |
2297 | } elsif ($c eq $close) { | |
2298 | $cnt--; | |
2299 | if ($cnt < 0) { | |
bd0865ec | 2300 | # qq()() isn't ")(" |
6e90668e SM |
2301 | $fail = 1; |
2302 | last; | |
2303 | } | |
2304 | } | |
2305 | } | |
2306 | $fail = 1 if $cnt != 0; | |
2307 | return ($open, "$open$str$close") if not $fail; | |
2308 | } | |
2309 | return ("", $str); | |
2310 | } | |
2311 | ||
2312 | sub single_delim { | |
2313 | my($q, $default, $str) = @_; | |
90be192f | 2314 | return "$default$str$default" if $default and index($str, $default) == -1; |
6e90668e SM |
2315 | my($succeed, $delim); |
2316 | ($succeed, $str) = balanced_delim($str); | |
2317 | return "$q$str" if $succeed; | |
2318 | for $delim ('/', '"', '#') { | |
2319 | return "$q$delim" . $str . $delim if index($str, $delim) == -1; | |
2320 | } | |
90be192f SM |
2321 | if ($default) { |
2322 | $str =~ s/$default/\\$default/g; | |
2323 | return "$default$str$default"; | |
2324 | } else { | |
2325 | $str =~ s[/][\\/]g; | |
2326 | return "$q/$str/"; | |
2327 | } | |
6e90668e SM |
2328 | } |
2329 | ||
6e90668e SM |
2330 | sub const { |
2331 | my $sv = shift; | |
2332 | if (class($sv) eq "SPECIAL") { | |
bd0865ec | 2333 | return ('undef', '1', '0')[$$sv-1]; # sv_undef, sv_yes, sv_no |
6e90668e | 2334 | } elsif ($sv->FLAGS & SVf_IOK) { |
a798dbf2 | 2335 | return $sv->IV; |
6e90668e | 2336 | } elsif ($sv->FLAGS & SVf_NOK) { |
a798dbf2 | 2337 | return $sv->NV; |
6e90668e SM |
2338 | } elsif ($sv->FLAGS & SVf_ROK) { |
2339 | return "\\(" . const($sv->RV) . ")"; # constant folded | |
a798dbf2 | 2340 | } else { |
6e90668e | 2341 | my $str = $sv->PV; |
bd0865ec | 2342 | if ($str =~ /[^ -~]/) { # ASCII for non-printing |
9d2c6865 | 2343 | return single_delim("qq", '"', uninterp escape_str unback $str); |
6e90668e | 2344 | } else { |
bd0865ec | 2345 | return single_delim("q", "'", unback $str); |
6e90668e | 2346 | } |
a798dbf2 MB |
2347 | } |
2348 | } | |
2349 | ||
6e90668e SM |
2350 | sub pp_const { |
2351 | my $self = shift; | |
9d2c6865 | 2352 | my($op, $cx) = @_; |
4c1f658f | 2353 | # if ($op->private & OPpCONST_BARE) { # trouble with `=>' autoquoting |
6e90668e SM |
2354 | # return $op->sv->PV; |
2355 | # } | |
2356 | return const($op->sv); | |
2357 | } | |
2358 | ||
2359 | sub dq { | |
2360 | my $self = shift; | |
2361 | my $op = shift; | |
3f872cb9 GS |
2362 | my $type = $op->name; |
2363 | if ($type eq "const") { | |
9d2c6865 | 2364 | return uninterp(escape_str(unback($op->sv->PV))); |
3f872cb9 | 2365 | } elsif ($type eq "concat") { |
6e90668e | 2366 | return $self->dq($op->first) . $self->dq($op->last); |
3f872cb9 | 2367 | } elsif ($type eq "uc") { |
6e90668e | 2368 | return '\U' . $self->dq($op->first->sibling) . '\E'; |
3f872cb9 | 2369 | } elsif ($type eq "lc") { |
6e90668e | 2370 | return '\L' . $self->dq($op->first->sibling) . '\E'; |
3f872cb9 | 2371 | } elsif ($type eq "ucfirst") { |
6e90668e | 2372 | return '\u' . $self->dq($op->first->sibling); |
3f872cb9 | 2373 | } elsif ($type eq "lcfirst") { |
6e90668e | 2374 | return '\l' . $self->dq($op->first->sibling); |
3f872cb9 | 2375 | } elsif ($type eq "quotemeta") { |
6e90668e | 2376 | return '\Q' . $self->dq($op->first->sibling) . '\E'; |
3f872cb9 | 2377 | } elsif ($type eq "join") { |
9d2c6865 | 2378 | return $self->deparse($op->last, 26); # was join($", @ary) |
a798dbf2 | 2379 | } else { |
9d2c6865 | 2380 | return $self->deparse($op, 26); |
6e90668e SM |
2381 | } |
2382 | } | |
2383 | ||
2384 | sub pp_backtick { | |
2385 | my $self = shift; | |
9d2c6865 | 2386 | my($op, $cx) = @_; |
6e90668e SM |
2387 | # skip pushmark |
2388 | return single_delim("qx", '`', $self->dq($op->first->sibling)); | |
2389 | } | |
2390 | ||
2391 | sub dquote { | |
2392 | my $self = shift; | |
bd0865ec | 2393 | my($op, $cx) = shift; |
3ed82cfc GS |
2394 | my $kid = $op->first->sibling; # skip ex-stringify, pushmark |
2395 | return $self->deparse($kid, $cx) if $self->{'unquote'}; | |
2396 | $self->maybe_targmy($kid, $cx, | |
2397 | sub {single_delim("qq", '"', $self->dq($_[1]))}); | |
6e90668e SM |
2398 | } |
2399 | ||
bd0865ec | 2400 | # OP_STRINGIFY is a listop, but it only ever has one arg |
3ed82cfc | 2401 | sub pp_stringify { maybe_targmy(@_, \&dquote) } |
6e90668e SM |
2402 | |
2403 | # tr/// and s/// (and tr[][], tr[]//, tr###, etc) | |
2404 | # note that tr(from)/to/ is OK, but not tr/from/(to) | |
2405 | sub double_delim { | |
2406 | my($from, $to) = @_; | |
2407 | my($succeed, $delim); | |
2408 | if ($from !~ m[/] and $to !~ m[/]) { | |
2409 | return "/$from/$to/"; | |
2410 | } elsif (($succeed, $from) = balanced_delim($from) and $succeed) { | |
2411 | if (($succeed, $to) = balanced_delim($to) and $succeed) { | |
2412 | return "$from$to"; | |
2413 | } else { | |
2414 | for $delim ('/', '"', '#') { # note no `'' -- s''' is special | |
2415 | return "$from$delim$to$delim" if index($to, $delim) == -1; | |
2416 | } | |
2417 | $to =~ s[/][\\/]g; | |
2418 | return "$from/$to/"; | |
2419 | } | |
2420 | } else { | |
2421 | for $delim ('/', '"', '#') { # note no ' | |
2422 | return "$delim$from$delim$to$delim" | |
2423 | if index($to . $from, $delim) == -1; | |
2424 | } | |
2425 | $from =~ s[/][\\/]g; | |
2426 | $to =~ s[/][\\/]g; | |
2427 | return "/$from/$to/"; | |
2428 | } | |
2429 | } | |
2430 | ||
2431 | sub pchr { # ASCII | |
2432 | my($n) = @_; | |
2433 | if ($n == ord '\\') { | |
2434 | return '\\\\'; | |
2435 | } elsif ($n >= ord(' ') and $n <= ord('~')) { | |
2436 | return chr($n); | |
2437 | } elsif ($n == ord "\a") { | |
2438 | return '\\a'; | |
2439 | } elsif ($n == ord "\b") { | |
2440 | return '\\b'; | |
2441 | } elsif ($n == ord "\t") { | |
2442 | return '\\t'; | |
2443 | } elsif ($n == ord "\n") { | |
2444 | return '\\n'; | |
2445 | } elsif ($n == ord "\e") { | |
2446 | return '\\e'; | |
2447 | } elsif ($n == ord "\f") { | |
2448 | return '\\f'; | |
2449 | } elsif ($n == ord "\r") { | |
2450 | return '\\r'; | |
2451 | } elsif ($n >= ord("\cA") and $n <= ord("\cZ")) { | |
2452 | return '\\c' . chr(ord("@") + $n); | |
2453 | } else { | |
2454 | # return '\x' . sprintf("%02x", $n); | |
2455 | return '\\' . sprintf("%03o", $n); | |
2456 | } | |
2457 | } | |
2458 | ||
2459 | sub collapse { | |
2460 | my(@chars) = @_; | |
2461 | my($c, $str, $tr); | |
2462 | for ($c = 0; $c < @chars; $c++) { | |
2463 | $tr = $chars[$c]; | |
2464 | $str .= pchr($tr); | |
2465 | if ($c <= $#chars - 2 and $chars[$c + 1] == $tr + 1 and | |
2466 | $chars[$c + 2] == $tr + 2) | |
2467 | { | |
f4a44678 SM |
2468 | for (; $c <= $#chars-1 and $chars[$c + 1] == $chars[$c] + 1; $c++) |
2469 | {} | |
6e90668e SM |
2470 | $str .= "-"; |
2471 | $str .= pchr($chars[$c]); | |
2472 | } | |
2473 | } | |
2474 | return $str; | |
2475 | } | |
2476 | ||
f4a44678 SM |
2477 | # XXX This has trouble with hyphens in the replacement (tr/bac/-AC/), |
2478 | # and backslashes. | |
2479 | ||
2480 | sub tr_decode_byte { | |
2481 | my($table, $flags) = @_; | |
2482 | my(@table) = unpack("s256", $table); | |
6e90668e SM |
2483 | my($c, $tr, @from, @to, @delfrom, $delhyphen); |
2484 | if ($table[ord "-"] != -1 and | |
2485 | $table[ord("-") - 1] == -1 || $table[ord("-") + 1] == -1) | |
2486 | { | |
2487 | $tr = $table[ord "-"]; | |
2488 | $table[ord "-"] = -1; | |
2489 | if ($tr >= 0) { | |
2490 | @from = ord("-"); | |
2491 | @to = $tr; | |
2492 | } else { # -2 ==> delete | |
2493 | $delhyphen = 1; | |
2494 | } | |
2495 | } | |
2496 | for ($c = 0; $c < 256; $c++) { | |
2497 | $tr = $table[$c]; | |
2498 | if ($tr >= 0) { | |
2499 | push @from, $c; push @to, $tr; | |
2500 | } elsif ($tr == -2) { | |
2501 | push @delfrom, $c; | |
2502 | } | |
2503 | } | |
6e90668e | 2504 | @from = (@from, @delfrom); |
f4a44678 | 2505 | if ($flags & OPpTRANS_COMPLEMENT) { |
6e90668e SM |
2506 | my @newfrom = (); |
2507 | my %from; | |
2508 | @from{@from} = (1) x @from; | |
2509 | for ($c = 0; $c < 256; $c++) { | |
2510 | push @newfrom, $c unless $from{$c}; | |
2511 | } | |
2512 | @from = @newfrom; | |
2513 | } | |
f4a44678 | 2514 | unless ($flags & OPpTRANS_DELETE) { |
6e90668e SM |
2515 | pop @to while $#to and $to[$#to] == $to[$#to -1]; |
2516 | } | |
6e90668e SM |
2517 | my($from, $to); |
2518 | $from = collapse(@from); | |
2519 | $to = collapse(@to); | |
2520 | $from .= "-" if $delhyphen; | |
f4a44678 SM |
2521 | return ($from, $to); |
2522 | } | |
2523 | ||
2524 | sub tr_chr { | |
2525 | my $x = shift; | |
2526 | if ($x == ord "-") { | |
2527 | return "\\-"; | |
2528 | } else { | |
2529 | return chr $x; | |
2530 | } | |
2531 | } | |
2532 | ||
2533 | # XXX This doesn't yet handle all cases correctly either | |
2534 | ||
2535 | sub tr_decode_utf8 { | |
2536 | my($swash_hv, $flags) = @_; | |
2537 | my %swash = $swash_hv->ARRAY; | |
2538 | my $final = undef; | |
2539 | $final = $swash{'FINAL'}->IV if exists $swash{'FINAL'}; | |
2540 | my $none = $swash{"NONE"}->IV; | |
2541 | my $extra = $none + 1; | |
2542 | my(@from, @delfrom, @to); | |
2543 | my $line; | |
2544 | foreach $line (split /\n/, $swash{'LIST'}->PV) { | |
2545 | my($min, $max, $result) = split(/\t/, $line); | |
2546 | $min = hex $min; | |
2547 | if (length $max) { | |
2548 | $max = hex $max; | |
2549 | } else { | |
2550 | $max = $min; | |
2551 | } | |
2552 | $result = hex $result; | |
2553 | if ($result == $extra) { | |
2554 | push @delfrom, [$min, $max]; | |
2555 | } else { | |
2556 | push @from, [$min, $max]; | |
2557 | push @to, [$result, $result + $max - $min]; | |
2558 | } | |
2559 | } | |
2560 | for my $i (0 .. $#from) { | |
2561 | if ($from[$i][0] == ord '-') { | |
2562 | unshift @from, splice(@from, $i, 1); | |
2563 | unshift @to, splice(@to, $i, 1); | |
2564 | last; | |
2565 | } elsif ($from[$i][1] == ord '-') { | |
2566 | $from[$i][1]--; | |
2567 | $to[$i][1]--; | |
2568 | unshift @from, ord '-'; | |
2569 | unshift @to, ord '-'; | |
2570 | last; | |
2571 | } | |
2572 | } | |
2573 | for my $i (0 .. $#delfrom) { | |
2574 | if ($delfrom[$i][0] == ord '-') { | |
2575 | push @delfrom, splice(@delfrom, $i, 1); | |
2576 | last; | |
2577 | } elsif ($delfrom[$i][1] == ord '-') { | |
2578 | $delfrom[$i][1]--; | |
2579 | push @delfrom, ord '-'; | |
2580 | last; | |
2581 | } | |
2582 | } | |
2583 | if (defined $final and $to[$#to][1] != $final) { | |
2584 | push @to, [$final, $final]; | |
2585 | } | |
2586 | push @from, @delfrom; | |
2587 | if ($flags & OPpTRANS_COMPLEMENT) { | |
2588 | my @newfrom; | |
2589 | my $next = 0; | |
2590 | for my $i (0 .. $#from) { | |
2591 | push @newfrom, [$next, $from[$i][0] - 1]; | |
2592 | $next = $from[$i][1] + 1; | |
2593 | } | |
2594 | @from = (); | |
2595 | for my $range (@newfrom) { | |
2596 | if ($range->[0] <= $range->[1]) { | |
2597 | push @from, $range; | |
2598 | } | |
2599 | } | |
2600 | } | |
2601 | my($from, $to, $diff); | |
2602 | for my $chunk (@from) { | |
2603 | $diff = $chunk->[1] - $chunk->[0]; | |
2604 | if ($diff > 1) { | |
2605 | $from .= tr_chr($chunk->[0]) . "-" . tr_chr($chunk->[1]); | |
2606 | } elsif ($diff == 1) { | |
2607 | $from .= tr_chr($chunk->[0]) . tr_chr($chunk->[1]); | |
2608 | } else { | |
2609 | $from .= tr_chr($chunk->[0]); | |
2610 | } | |
2611 | } | |
2612 | for my $chunk (@to) { | |
2613 | $diff = $chunk->[1] - $chunk->[0]; | |
2614 | if ($diff > 1) { | |
2615 | $to .= tr_chr($chunk->[0]) . "-" . tr_chr($chunk->[1]); | |
2616 | } elsif ($diff == 1) { | |
2617 | $to .= tr_chr($chunk->[0]) . tr_chr($chunk->[1]); | |
2618 | } else { | |
2619 | $to .= tr_chr($chunk->[0]); | |
2620 | } | |
2621 | } | |
2622 | #$final = sprintf("%04x", $final) if defined $final; | |
2623 | #$none = sprintf("%04x", $none) if defined $none; | |
2624 | #$extra = sprintf("%04x", $extra) if defined $extra; | |
2625 | #print STDERR "final: $final\n none: $none\nextra: $extra\n"; | |
2626 | #print STDERR $swash{'LIST'}->PV; | |
2627 | return (escape_str($from), escape_str($to)); | |
2628 | } | |
2629 | ||
2630 | sub pp_trans { | |
2631 | my $self = shift; | |
2632 | my($op, $cx) = @_; | |
2633 | my($from, $to); | |
2634 | if (class($op) eq "PVOP") { | |
2635 | ($from, $to) = tr_decode_byte($op->pv, $op->private); | |
2636 | } else { # class($op) eq "SVOP" | |
2637 | ($from, $to) = tr_decode_utf8($op->sv->RV, $op->private); | |
2638 | } | |
2639 | my $flags = ""; | |
2640 | $flags .= "c" if $op->private & OPpTRANS_COMPLEMENT; | |
2641 | $flags .= "d" if $op->private & OPpTRANS_DELETE; | |
2642 | $to = "" if $from eq $to and $flags eq ""; | |
2643 | $flags .= "s" if $op->private & OPpTRANS_SQUASH; | |
6e90668e SM |
2644 | return "tr" . double_delim($from, $to) . $flags; |
2645 | } | |
2646 | ||
2647 | # Like dq(), but different | |
2648 | sub re_dq { | |
2649 | my $self = shift; | |
2650 | my $op = shift; | |
3f872cb9 GS |
2651 | my $type = $op->name; |
2652 | if ($type eq "const") { | |
6e90668e | 2653 | return uninterp($op->sv->PV); |
3f872cb9 | 2654 | } elsif ($type eq "concat") { |
6e90668e | 2655 | return $self->re_dq($op->first) . $self->re_dq($op->last); |
3f872cb9 | 2656 | } elsif ($type eq "uc") { |
6e90668e | 2657 | return '\U' . $self->re_dq($op->first->sibling) . '\E'; |
3f872cb9 | 2658 | } elsif ($type eq "lc") { |
6e90668e | 2659 | return '\L' . $self->re_dq($op->first->sibling) . '\E'; |
3f872cb9 | 2660 | } elsif ($type eq "ucfirst") { |
6e90668e | 2661 | return '\u' . $self->re_dq($op->first->sibling); |
3f872cb9 | 2662 | } elsif ($type eq "lcfirst") { |
6e90668e | 2663 | return '\l' . $self->re_dq($op->first->sibling); |
3f872cb9 | 2664 | } elsif ($type eq "quotemeta") { |
6e90668e | 2665 | return '\Q' . $self->re_dq($op->first->sibling) . '\E'; |
3f872cb9 | 2666 | } elsif ($type eq "join") { |
9d2c6865 | 2667 | return $self->deparse($op->last, 26); # was join($", @ary) |
6e90668e | 2668 | } else { |
9d2c6865 | 2669 | return $self->deparse($op, 26); |
6e90668e SM |
2670 | } |
2671 | } | |
2672 | ||
2673 | sub pp_regcomp { | |
2674 | my $self = shift; | |
9d2c6865 | 2675 | my($op, $cx) = @_; |
6e90668e | 2676 | my $kid = $op->first; |
3f872cb9 GS |
2677 | $kid = $kid->first if $kid->name eq "regcmaybe"; |
2678 | $kid = $kid->first if $kid->name eq "regcreset"; | |
6e90668e SM |
2679 | return $self->re_dq($kid); |
2680 | } | |
2681 | ||
6e90668e SM |
2682 | # osmic acid -- see osmium tetroxide |
2683 | ||
2684 | my %matchwords; | |
2685 | map($matchwords{join "", sort split //, $_} = $_, 'cig', 'cog', 'cos', 'cogs', | |
2686 | 'cox', 'go', 'is', 'ism', 'iso', 'mig', 'mix', 'osmic', 'ox', 'sic', | |
2687 | 'sig', 'six', 'smog', 'so', 'soc', 'sog', 'xi'); | |
2688 | ||
90be192f | 2689 | sub matchop { |
6e90668e | 2690 | my $self = shift; |
90be192f | 2691 | my($op, $cx, $name, $delim) = @_; |
6e90668e | 2692 | my $kid = $op->first; |
9d2c6865 | 2693 | my ($binop, $var, $re) = ("", "", ""); |
6e90668e | 2694 | if ($op->flags & OPf_STACKED) { |
9d2c6865 SM |
2695 | $binop = 1; |
2696 | $var = $self->deparse($kid, 20); | |
6e90668e SM |
2697 | $kid = $kid->sibling; |
2698 | } | |
2699 | if (null $kid) { | |
9d2c6865 | 2700 | $re = re_uninterp(escape_str($op->precomp)); |
6e90668e | 2701 | } else { |
9d2c6865 | 2702 | $re = $self->deparse($kid, 1); |
6e90668e SM |
2703 | } |
2704 | my $flags = ""; | |
2705 | $flags .= "c" if $op->pmflags & PMf_CONTINUE; | |
2706 | $flags .= "g" if $op->pmflags & PMf_GLOBAL; | |
2707 | $flags .= "i" if $op->pmflags & PMf_FOLD; | |
2708 | $flags .= "m" if $op->pmflags & PMf_MULTILINE; | |
2709 | $flags .= "o" if $op->pmflags & PMf_KEEP; | |
2710 | $flags .= "s" if $op->pmflags & PMf_SINGLELINE; | |
2711 | $flags .= "x" if $op->pmflags & PMf_EXTENDED; | |
2712 | $flags = $matchwords{$flags} if $matchwords{$flags}; | |
2713 | if ($op->pmflags & PMf_ONCE) { # only one kind of delimiter works here | |
2714 | $re =~ s/\?/\\?/g; | |
9d2c6865 SM |
2715 | $re = "?$re?"; |
2716 | } else { | |
90be192f | 2717 | $re = single_delim($name, $delim, $re); |
9d2c6865 SM |
2718 | } |
2719 | $re = $re . $flags; | |
2720 | if ($binop) { | |
2721 | return $self->maybe_parens("$var =~ $re", $cx, 20); | |
2722 | } else { | |
2723 | return $re; | |
6e90668e | 2724 | } |
6e90668e SM |
2725 | } |
2726 | ||
90be192f SM |
2727 | sub pp_match { matchop(@_, "m", "/") } |
2728 | sub pp_pushre { matchop(@_, "m", "/") } | |
2729 | sub pp_qr { matchop(@_, "qr", "") } | |
6e90668e SM |
2730 | |
2731 | sub pp_split { | |
2732 | my $self = shift; | |
9d2c6865 | 2733 | my($op, $cx) = @_; |
6e90668e SM |
2734 | my($kid, @exprs, $ary, $expr); |
2735 | $kid = $op->first; | |
2736 | if ($ {$kid->pmreplroot}) { | |
2737 | $ary = '@' . $self->gv_name($kid->pmreplroot); | |
2738 | } | |
2739 | for (; !null($kid); $kid = $kid->sibling) { | |
9d2c6865 | 2740 | push @exprs, $self->deparse($kid, 6); |
6e90668e SM |
2741 | } |
2742 | $expr = "split(" . join(", ", @exprs) . ")"; | |
2743 | if ($ary) { | |
9d2c6865 | 2744 | return $self->maybe_parens("$ary = $expr", $cx, 7); |
6e90668e SM |
2745 | } else { |
2746 | return $expr; | |
2747 | } | |
2748 | } | |
2749 | ||
2750 | # oxime -- any of various compounds obtained chiefly by the action of | |
2751 | # hydroxylamine on aldehydes and ketones and characterized by the | |
2752 | # bivalent grouping C=NOH [Webster's Tenth] | |
2753 | ||
2754 | my %substwords; | |
2755 | map($substwords{join "", sort split //, $_} = $_, 'ego', 'egoism', 'em', | |
2756 | 'es', 'ex', 'exes', 'gee', 'go', 'goes', 'ie', 'ism', 'iso', 'me', | |
2757 | 'meese', 'meso', 'mig', 'mix', 'os', 'ox', 'oxime', 'see', 'seem', | |
2758 | 'seg', 'sex', 'sig', 'six', 'smog', 'sog', 'some', 'xi'); | |
2759 | ||
2760 | sub pp_subst { | |
2761 | my $self = shift; | |
9d2c6865 | 2762 | my($op, $cx) = @_; |
6e90668e | 2763 | my $kid = $op->first; |
9d2c6865 | 2764 | my($binop, $var, $re, $repl) = ("", "", "", ""); |
6e90668e | 2765 | if ($op->flags & OPf_STACKED) { |
9d2c6865 SM |
2766 | $binop = 1; |
2767 | $var = $self->deparse($kid, 20); | |
6e90668e SM |
2768 | $kid = $kid->sibling; |
2769 | } | |
2770 | my $flags = ""; | |
2771 | if (null($op->pmreplroot)) { | |
2772 | $repl = $self->dq($kid); | |
2773 | $kid = $kid->sibling; | |
2774 | } else { | |
2775 | $repl = $op->pmreplroot->first; # skip substcont | |
3f872cb9 | 2776 | while ($repl->name eq "entereval") { |
6e90668e SM |
2777 | $repl = $repl->first; |
2778 | $flags .= "e"; | |
2779 | } | |
bd0865ec GS |
2780 | if ($op->pmflags & PMf_EVAL) { |
2781 | $repl = $self->deparse($repl, 0); | |
2782 | } else { | |
2783 | $repl = $self->dq($repl); | |
2784 | } | |
6e90668e SM |
2785 | } |
2786 | if (null $kid) { | |
9d2c6865 | 2787 | $re = re_uninterp(escape_str($op->precomp)); |
6e90668e | 2788 | } else { |
9d2c6865 | 2789 | $re = $self->deparse($kid, 1); |
a798dbf2 | 2790 | } |
6e90668e SM |
2791 | $flags .= "e" if $op->pmflags & PMf_EVAL; |
2792 | $flags .= "g" if $op->pmflags & PMf_GLOBAL; | |
2793 | $flags .= "i" if $op->pmflags & PMf_FOLD; | |
2794 | $flags .= "m" if $op->pmflags & PMf_MULTILINE; | |
2795 | $flags .= "o" if $op->pmflags & PMf_KEEP; | |
2796 | $flags .= "s" if $op->pmflags & PMf_SINGLELINE; | |
2797 | $flags .= "x" if $op->pmflags & PMf_EXTENDED; | |
2798 | $flags = $substwords{$flags} if $substwords{$flags}; | |
9d2c6865 SM |
2799 | if ($binop) { |
2800 | return $self->maybe_parens("$var =~ s" | |
2801 | . double_delim($re, $repl) . $flags, | |
2802 | $cx, 20); | |
2803 | } else { | |
2804 | return "s". double_delim($re, $repl) . $flags; | |
2805 | } | |
a798dbf2 MB |
2806 | } |
2807 | ||
2808 | 1; | |
f6f9bdb7 SM |
2809 | __END__ |
2810 | ||
2811 | =head1 NAME | |
2812 | ||
2813 | B::Deparse - Perl compiler backend to produce perl code | |
2814 | ||
2815 | =head1 SYNOPSIS | |
2816 | ||
f4a44678 SM |
2817 | B<perl> B<-MO=Deparse>[B<,-u>I<PACKAGE>][B<,-p>][B<,-q>][B<,-l>][B<,-s>I<LETTERS>] |
2818 | I<prog.pl> | |
f6f9bdb7 SM |
2819 | |
2820 | =head1 DESCRIPTION | |
2821 | ||
2822 | B::Deparse is a backend module for the Perl compiler that generates | |
2823 | perl source code, based on the internal compiled structure that perl | |
2824 | itself creates after parsing a program. The output of B::Deparse won't | |
2825 | be exactly the same as the original source, since perl doesn't keep | |
2826 | track of comments or whitespace, and there isn't a one-to-one | |
2827 | correspondence between perl's syntactical constructions and their | |
9d2c6865 SM |
2828 | compiled form, but it will often be close. When you use the B<-p> |
2829 | option, the output also includes parentheses even when they are not | |
2830 | required by precedence, which can make it easy to see if perl is | |
2831 | parsing your expressions the way you intended. | |
f6f9bdb7 SM |
2832 | |
2833 | Please note that this module is mainly new and untested code and is | |
2834 | still under development, so it may change in the future. | |
2835 | ||
2836 | =head1 OPTIONS | |
2837 | ||
9d2c6865 SM |
2838 | As with all compiler backend options, these must follow directly after |
2839 | the '-MO=Deparse', separated by a comma but not any white space. | |
f6f9bdb7 SM |
2840 | |
2841 | =over 4 | |
2842 | ||
bd0865ec GS |
2843 | =item B<-l> |
2844 | ||
2845 | Add '#line' declarations to the output based on the line and file | |
2846 | locations of the original code. | |
2847 | ||
9d2c6865 SM |
2848 | =item B<-p> |
2849 | ||
2850 | Print extra parentheses. Without this option, B::Deparse includes | |
2851 | parentheses in its output only when they are needed, based on the | |
2852 | structure of your program. With B<-p>, it uses parentheses (almost) | |
2853 | whenever they would be legal. This can be useful if you are used to | |
2854 | LISP, or if you want to see how perl parses your input. If you say | |
2855 | ||
2856 | if ($var & 0x7f == 65) {print "Gimme an A!"} | |
2857 | print ($which ? $a : $b), "\n"; | |
2858 | $name = $ENV{USER} or "Bob"; | |
2859 | ||
2860 | C<B::Deparse,-p> will print | |
2861 | ||
2862 | if (($var & 0)) { | |
2863 | print('Gimme an A!') | |
2864 | }; | |
2865 | (print(($which ? $a : $b)), '???'); | |
2866 | (($name = $ENV{'USER'}) or '???') | |
2867 | ||
2868 | which probably isn't what you intended (the C<'???'> is a sign that | |
2869 | perl optimized away a constant value). | |
2870 | ||
bd0865ec GS |
2871 | =item B<-q> |
2872 | ||
2873 | Expand double-quoted strings into the corresponding combinations of | |
2874 | concatenation, uc, ucfirst, lc, lcfirst, quotemeta, and join. For | |
2875 | instance, print | |
2876 | ||
2877 | print "Hello, $world, @ladies, \u$gentlemen\E, \u\L$me!"; | |
2878 | ||
2879 | as | |
2880 | ||
2881 | print 'Hello, ' . $world . ', ' . join($", @ladies) . ', ' | |
2882 | . ucfirst($gentlemen) . ', ' . ucfirst(lc $me . '!'); | |
2883 | ||
2884 | Note that the expanded form represents the way perl handles such | |
2885 | constructions internally -- this option actually turns off the reverse | |
2886 | translation that B::Deparse usually does. On the other hand, note that | |
2887 | C<$x = "$y"> is not the same as C<$x = $y>: the former makes the value | |
2888 | of $y into a string before doing the assignment. | |
2889 | ||
9d2c6865 | 2890 | =item B<-u>I<PACKAGE> |
f6f9bdb7 SM |
2891 | |
2892 | Normally, B::Deparse deparses the main code of a program, all the subs | |
2893 | called by the main program (and all the subs called by them, | |
2894 | recursively), and any other subs in the main:: package. To include | |
2895 | subs in other packages that aren't called directly, such as AUTOLOAD, | |
f4a44678 SM |
2896 | DESTROY, other subs called automatically by perl, and methods (which |
2897 | aren't resolved to subs until runtime), use the B<-u> option. The | |
f6f9bdb7 SM |
2898 | argument to B<-u> is the name of a package, and should follow directly |
2899 | after the 'u'. Multiple B<-u> options may be given, separated by | |
2900 | commas. Note that unlike some other backends, B::Deparse doesn't | |
2901 | (yet) try to guess automatically when B<-u> is needed -- you must | |
2902 | invoke it yourself. | |
2903 | ||
9d2c6865 SM |
2904 | =item B<-s>I<LETTERS> |
2905 | ||
f4a44678 SM |
2906 | Tweak the style of B::Deparse's output. The letters should follow |
2907 | directly after the 's', with no space or punctuation. The following | |
2908 | options are available: | |
9d2c6865 SM |
2909 | |
2910 | =over 4 | |
2911 | ||
2912 | =item B<C> | |
2913 | ||
2914 | Cuddle C<elsif>, C<else>, and C<continue> blocks. For example, print | |
2915 | ||
2916 | if (...) { | |
2917 | ... | |
2918 | } else { | |
2919 | ... | |
2920 | } | |
2921 | ||
2922 | instead of | |
2923 | ||
2924 | if (...) { | |
2925 | ... | |
2926 | } | |
2927 | else { | |
2928 | ... | |
2929 | } | |
2930 | ||
2931 | The default is not to cuddle. | |
2932 | ||
f4a44678 SM |
2933 | =item B<i>I<NUMBER> |
2934 | ||
2935 | Indent lines by multiples of I<NUMBER> columns. The default is 4 columns. | |
2936 | ||
2937 | =item B<T> | |
2938 | ||
2939 | Use tabs for each 8 columns of indent. The default is to use only spaces. | |
2940 | For instance, if the style options are B<-si4T>, a line that's indented | |
2941 | 3 times will be preceded by one tab and four spaces; if the options were | |
2942 | B<-si8T>, the same line would be preceded by three tabs. | |
2943 | ||
2944 | =item B<v>I<STRING>B<.> | |
2945 | ||
2946 | Print I<STRING> for the value of a constant that can't be determined | |
2947 | because it was optimized away (mnemonic: this happens when a constant | |
2948 | is used in B<v>oid context). The end of the string is marked by a period. | |
2949 | The string should be a valid perl expression, generally a constant. | |
2950 | Note that unless it's a number, it probably needs to be quoted, and on | |
2951 | a command line quotes need to be protected from the shell. Some | |
2952 | conventional values include 0, 1, 42, '', 'foo', and | |
2953 | 'Useless use of constant omitted' (which may need to be | |
2954 | B<-sv"'Useless use of constant omitted'."> | |
2955 | or something similar depending on your shell). The default is '???'. | |
2956 | If you're using B::Deparse on a module or other file that's require'd, | |
2957 | you shouldn't use a value that evaluates to false, since the customary | |
2958 | true constant at the end of a module will be in void context when the | |
2959 | file is compiled as a main program. | |
2960 | ||
9d2c6865 SM |
2961 | =back |
2962 | ||
f6f9bdb7 SM |
2963 | =back |
2964 | ||
f4a44678 SM |
2965 | =head1 USING B::Deparse AS A MODULE |
2966 | ||
2967 | =head2 Synopsis | |
2968 | ||
2969 | use B::Deparse; | |
2970 | $deparse = B::Deparse->new("-p", "-sC"); | |
2971 | $body = $deparse->coderef2text(\&func); | |
2972 | eval "sub func $body"; # the inverse operation | |
2973 | ||
2974 | =head2 Description | |
2975 | ||
2976 | B::Deparse can also be used on a sub-by-sub basis from other perl | |
2977 | programs. | |
2978 | ||
2979 | =head2 new | |
2980 | ||
2981 | $deparse = B::Deparse->new(OPTIONS) | |
2982 | ||
2983 | Create an object to store the state of a deparsing operation and any | |
2984 | options. The options are the same as those that can be given on the | |
2985 | command line (see L</OPTIONS>); options that are separated by commas | |
2986 | after B<-MO=Deparse> should be given as separate strings. Some | |
2987 | options, like B<-u>, don't make sense for a single subroutine, so | |
2988 | don't pass them. | |
2989 | ||
2990 | =head2 coderef2text | |
2991 | ||
2992 | $body = $deparse->coderef2text(\&func) | |
2993 | $body = $deparse->coderef2text(sub ($$) { ... }) | |
2994 | ||
2995 | Return source code for the body of a subroutine (a block, optionally | |
2996 | preceded by a prototype in parens), given a reference to the | |
2997 | sub. Because a subroutine can have no names, or more than one name, | |
2998 | this method doesn't return a complete subroutine definition -- if you | |
2999 | want to eval the result, you should prepend "sub subname ", or "sub " | |
3000 | for an anonymous function constructor. Unless the sub was defined in | |
3001 | the main:: package, the code will include a package declaration. | |
3002 | ||
f6f9bdb7 SM |
3003 | =head1 BUGS |
3004 | ||
3005 | See the 'to do' list at the beginning of the module file. | |
3006 | ||
3007 | =head1 AUTHOR | |
3008 | ||
bd0865ec | 3009 | Stephen McCamant <smccam@uclink4.berkeley.edu>, based on an earlier |
f4a44678 SM |
3010 | version by Malcolm Beattie <mbeattie@sable.ox.ac.uk>, with |
3011 | contributions from Gisle Aas, James Duncan, Albert Dvornik, Hugo van | |
3012 | der Sanden, Gurusamy Sarathy, and Nick Ing-Simmons. | |
f6f9bdb7 SM |
3013 | |
3014 | =cut |