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Proper fix for CvOUTSIDE weak refcounting
[perl5.git] / ext / B / B / Deparse.pm
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6e90668e 1# B::Deparse.pm
6f611a1a 2# Copyright (c) 1998, 1999, 2000 Stephen McCamant. All rights reserved.
6e90668e
SM
3# This module is free software; you can redistribute and/or modify
4# it under the same terms as Perl itself.
5
6# This is based on the module of the same name by Malcolm Beattie,
7# but essentially none of his code remains.
8
a798dbf2 9package B::Deparse;
ff97752d 10use Carp;
51a5edaf 11use B qw(class main_root main_start main_cv svref_2object opnumber perlstring
bd0865ec 12 OPf_WANT OPf_WANT_VOID OPf_WANT_SCALAR OPf_WANT_LIST
90c0eb26 13 OPf_KIDS OPf_REF OPf_STACKED OPf_SPECIAL OPf_MOD
ce4e655d 14 OPpLVAL_INTRO OPpOUR_INTRO OPpENTERSUB_AMPER OPpSLICE OPpCONST_BARE
3ed82cfc 15 OPpTRANS_SQUASH OPpTRANS_DELETE OPpTRANS_COMPLEMENT OPpTARGET_MY
7e80da18
RH
16 OPpCONST_ARYBASE OPpEXISTS_SUB OPpSORT_NUMERIC OPpSORT_INTEGER
17 OPpSORT_REVERSE
7dafbf52 18 SVf_IOK SVf_NOK SVf_ROK SVf_POK SVpad_OUR SVf_FAKE
6aaf4108 19 CVf_METHOD CVf_LOCKED CVf_LVALUE
fcd95d64 20 PMf_KEEP PMf_GLOBAL PMf_CONTINUE PMf_EVAL PMf_ONCE PMf_SKIPWHITE
bd0865ec 21 PMf_MULTILINE PMf_SINGLELINE PMf_FOLD PMf_EXTENDED);
9a58b761 22$VERSION = 0.63;
a798dbf2 23use strict;
2ae48fff 24use vars qw/$AUTOLOAD/;
34a48b4b 25use warnings ();
a798dbf2 26
6e90668e
SM
27# Changes between 0.50 and 0.51:
28# - fixed nulled leave with live enter in sort { }
29# - fixed reference constants (\"str")
30# - handle empty programs gracefully
31# - handle infinte loops (for (;;) {}, while (1) {})
32# - differentiate between `for my $x ...' and `my $x; for $x ...'
33# - various minor cleanups
34# - moved globals into an object
35# - added `-u', like B::C
36# - package declarations using cop_stash
37# - subs, formats and code sorted by cop_seq
f6f9bdb7 38# Changes between 0.51 and 0.52:
4d1ff10f 39# - added pp_threadsv (special variables under USE_5005THREADS)
f6f9bdb7 40# - added documentation
bd0865ec 41# Changes between 0.52 and 0.53:
9d2c6865
SM
42# - many changes adding precedence contexts and associativity
43# - added `-p' and `-s' output style options
44# - various other minor fixes
bd0865ec 45# Changes between 0.53 and 0.54:
d7f5b6da
SM
46# - added support for new `for (1..100)' optimization,
47# thanks to Gisle Aas
bd0865ec 48# Changes between 0.54 and 0.55:
90be192f
SM
49# - added support for new qr// construct
50# - added support for new pp_regcreset OP
bd0865ec 51# Changes between 0.55 and 0.56:
f5aa8f4e
SM
52# - tested on base/*.t, cmd/*.t, comp/*.t, io/*.t
53# - fixed $# on non-lexicals broken in last big rewrite
54# - added temporary fix for change in opcode of OP_STRINGIFY
55# - fixed problem in 0.54's for() patch in `for (@ary)'
56# - fixed precedence in conditional of ?:
57# - tweaked list paren elimination in `my($x) = @_'
58# - made continue-block detection trickier wrt. null ops
59# - fixed various prototype problems in pp_entersub
60# - added support for sub prototypes that never get GVs
61# - added unquoting for special filehandle first arg in truncate
62# - print doubled rv2gv (a bug) as `*{*GV}' instead of illegal `**GV'
63# - added semicolons at the ends of blocks
64# - added -l `#line' declaration option -- fixes cmd/subval.t 27,28
bd0865ec
GS
65# Changes between 0.56 and 0.561:
66# - fixed multiply-declared my var in pp_truncate (thanks to Sarathy)
67# - used new B.pm symbolic constants (done by Nick Ing-Simmons)
68# Changes between 0.561 and 0.57:
69# - stylistic changes to symbolic constant stuff
70# - handled scope in s///e replacement code
71# - added unquote option for expanding "" into concats, etc.
72# - split method and proto parts of pp_entersub into separate functions
73# - various minor cleanups
f4a44678
SM
74# Changes after 0.57:
75# - added parens in \&foo (patch by Albert Dvornik)
76# Changes between 0.57 and 0.58:
77# - fixed `0' statements that weren't being printed
78# - added methods for use from other programs
79# (based on patches from James Duncan and Hugo van der Sanden)
80# - added -si and -sT to control indenting (also based on a patch from Hugo)
81# - added -sv to print something else instead of '???'
82# - preliminary version of utf8 tr/// handling
3ed82cfc
GS
83# Changes after 0.58:
84# - uses of $op->ppaddr changed to new $op->name (done by Sarathy)
85# - added support for Hugo's new OP_SETSTATE (like nextstate)
86# Changes between 0.58 and 0.59
87# - added support for Chip's OP_METHOD_NAMED
88# - added support for Ilya's OPpTARGET_MY optimization
89# - elided arrows before `()' subscripts when possible
58cccf98
SM
90# Changes between 0.59 and 0.60
91# - support for method attribues was added
92# - some warnings fixed
93# - separate recognition of constant subs
94# - rewrote continue block handling, now recoginizing for loops
95# - added more control of expanding control structures
c7f67cde
RH
96# Changes between 0.60 and 0.61 (mostly by Robin Houston)
97# - many bug-fixes
98# - support for pragmas and 'use'
99# - support for the little-used $[ variable
100# - support for __DATA__ sections
101# - UTF8 support
102# - BEGIN, CHECK, INIT and END blocks
103# - scoping of subroutine declarations fixed
104# - compile-time output from the input program can be suppressed, so that the
105# output is just the deparsed code. (a change to O.pm in fact)
106# - our() declarations
107# - *all* the known bugs are now listed in the BUGS section
108# - comprehensive test mechanism (TEST -deparse)
9a58b761
RGS
109# Changes between 0.62 and 0.63 (mostly by Rafael Garcia-Suarez)
110# - bug-fixes
111# - new switch -P
112# - support for command-line switches (-l, -0, etc.)
6e90668e
SM
113
114# Todo:
2a9e2f8a
RH
115# (See also BUGS section at the end of this file)
116#
f4a44678
SM
117# - finish tr/// changes
118# - add option for even more parens (generalize \&foo change)
90be192f 119# - left/right context
f4a44678 120# - treat top-level block specially for incremental output
58cccf98 121# - copy comments (look at real text with $^P?)
f5aa8f4e 122# - avoid semis in one-statement blocks
9d2c6865 123# - associativity of &&=, ||=, ?:
6e90668e
SM
124# - ',' => '=>' (auto-unquote?)
125# - break long lines ("\r" as discretionary break?)
f4a44678
SM
126# - configurable syntax highlighting: ANSI color, HTML, TeX, etc.
127# - more style options: brace style, hex vs. octal, quotes, ...
128# - print big ints as hex/octal instead of decimal (heuristic?)
3ed82cfc 129# - handle `my $x if 0'?
f5aa8f4e 130# - coordinate with Data::Dumper (both directions? see previous)
6e90668e
SM
131# - version using op_next instead of op_first/sibling?
132# - avoid string copies (pass arrays, one big join?)
9d2c6865 133# - here-docs?
6e90668e 134
f5aa8f4e 135# Tests that will always fail:
2a9e2f8a 136# (see t/TEST for the short list)
f5aa8f4e 137
6e90668e
SM
138# Object fields (were globals):
139#
140# avoid_local:
141# (local($a), local($b)) and local($a, $b) have the same internal
142# representation but the short form looks better. We notice we can
143# use a large-scale local when checking the list, but need to prevent
144# individual locals too. This hash holds the addresses of OPs that
145# have already had their local-ness accounted for. The same thing
146# is done with my().
147#
148# curcv:
149# CV for current sub (or main program) being deparsed
150#
8510e997
RH
151# curcvlex:
152# Cached hash of lexical variables for curcv: keys are names,
153# each value is an array of pairs, indicating the cop_seq of scopes
154# in which a var of that name is valid.
155#
34a48b4b
RH
156# curcop:
157# COP for statement being deparsed
158#
6e90668e
SM
159# curstash:
160# name of the current package for deparsed code
161#
162# subs_todo:
34a48b4b 163# array of [cop_seq, CV, is_format?] for subs and formats we still
6e90668e
SM
164# want to deparse
165#
f5aa8f4e
SM
166# protos_todo:
167# as above, but [name, prototype] for subs that never got a GV
168#
6e90668e
SM
169# subs_done, forms_done:
170# keys are addresses of GVs for subs and formats we've already
171# deparsed (or at least put into subs_todo)
9d2c6865 172#
0ca62a8e
RH
173# subs_declared
174# keys are names of subs for which we've printed declarations.
175# That means we can omit parentheses from the arguments.
176#
1d38190f
RGS
177# subs_deparsed
178# Keeps track of fully qualified names of all deparsed subs.
179#
9d2c6865 180# parens: -p
f5aa8f4e 181# linenums: -l
bd0865ec 182# unquote: -q
9d2c6865 183# cuddle: ` ' or `\n', depending on -sC
f4a44678
SM
184# indent_size: -si
185# use_tabs: -sT
186# ex_const: -sv
9d2c6865
SM
187
188# A little explanation of how precedence contexts and associativity
189# work:
190#
191# deparse() calls each per-op subroutine with an argument $cx (short
192# for context, but not the same as the cx* in the perl core), which is
193# a number describing the op's parents in terms of precedence, whether
f5aa8f4e 194# they're inside an expression or at statement level, etc. (see
9d2c6865
SM
195# chart below). When ops with children call deparse on them, they pass
196# along their precedence. Fractional values are used to implement
197# associativity (`($x + $y) + $z' => `$x + $y + $y') and related
198# parentheses hacks. The major disadvantage of this scheme is that
199# it doesn't know about right sides and left sides, so say if you
200# assign a listop to a variable, it can't tell it's allowed to leave
201# the parens off the listop.
202
203# Precedences:
204# 26 [TODO] inside interpolation context ("")
205# 25 left terms and list operators (leftward)
206# 24 left ->
207# 23 nonassoc ++ --
208# 22 right **
209# 21 right ! ~ \ and unary + and -
210# 20 left =~ !~
211# 19 left * / % x
212# 18 left + - .
213# 17 left << >>
214# 16 nonassoc named unary operators
215# 15 nonassoc < > <= >= lt gt le ge
216# 14 nonassoc == != <=> eq ne cmp
217# 13 left &
218# 12 left | ^
219# 11 left &&
220# 10 left ||
221# 9 nonassoc .. ...
222# 8 right ?:
223# 7 right = += -= *= etc.
224# 6 left , =>
225# 5 nonassoc list operators (rightward)
226# 4 right not
227# 3 left and
228# 2 left or xor
229# 1 statement modifiers
230# 0 statement level
231
6ec152c3
RH
232# Also, lineseq may pass a fourth parameter to the pp_ routines:
233# if present, the fourth parameter is passed on by deparse.
234#
235# If present and true, it means that the op exists directly as
ce4e655d 236# part of a lineseq. Currently it's only used by scopeop to
6ec152c3
RH
237# decide whether its results need to be enclosed in a do {} block.
238
9d2c6865
SM
239# Nonprinting characters with special meaning:
240# \cS - steal parens (see maybe_parens_unop)
241# \n - newline and indent
242# \t - increase indent
243# \b - decrease indent (`outdent')
f5aa8f4e 244# \f - flush left (no indent)
9d2c6865 245# \cK - kill following semicolon, if any
6e90668e
SM
246
247sub null {
248 my $op = shift;
249 return class($op) eq "NULL";
250}
251
252sub todo {
253 my $self = shift;
34a48b4b 254 my($cv, $is_form) = @_;
e31885a0 255 return unless ($cv->FILE eq $0 || exists $self->{files}{$cv->FILE});
6e90668e
SM
256 my $seq;
257 if (!null($cv->START) and is_state($cv->START)) {
258 $seq = $cv->START->cop_seq;
259 } else {
260 $seq = 0;
261 }
34a48b4b 262 push @{$self->{'subs_todo'}}, [$seq, $cv, $is_form];
1d38190f
RGS
263 unless ($is_form || class($cv->STASH) eq 'SPECIAL') {
264 $self->{'subs_deparsed'}{$cv->STASH->NAME."::".$cv->GV->NAME} = 1;
265 }
6e90668e
SM
266}
267
268sub next_todo {
269 my $self = shift;
270 my $ent = shift @{$self->{'subs_todo'}};
34a48b4b
RH
271 my $cv = $ent->[1];
272 my $gv = $cv->GV;
273 my $name = $self->gv_name($gv);
6e90668e
SM
274 if ($ent->[2]) {
275 return "format $name =\n"
e31885a0 276 . $self->deparse_format($ent->[1]). "\n";
6e90668e 277 } else {
0ca62a8e 278 $self->{'subs_declared'}{$name} = 1;
34a48b4b
RH
279 if ($name eq "BEGIN") {
280 my $use_dec = $self->begin_is_use($cv);
0e7fe0f0
RH
281 if (defined ($use_dec)) {
282 return () if 0 == length($use_dec);
283 return $use_dec;
284 }
34a48b4b 285 }
a0035eb8
RH
286 my $l = '';
287 if ($self->{'linenums'}) {
288 my $line = $gv->LINE;
289 my $file = $gv->FILE;
290 $l = "\n\f#line $line \"$file\"\n";
291 }
292 return "${l}sub $name " . $self->deparse_sub($cv);
34a48b4b
RH
293 }
294}
295
296# Return a "use" declaration for this BEGIN block, if appropriate
297sub begin_is_use {
298 my ($self, $cv) = @_;
299 my $root = $cv->ROOT;
80dc0729 300 local @$self{qw'curcv curcvlex'} = ($cv);
34a48b4b
RH
301#require B::Debug;
302#B::walkoptree($cv->ROOT, "debug");
303 my $lineseq = $root->first;
304 return if $lineseq->name ne "lineseq";
305
306 my $req_op = $lineseq->first->sibling;
307 return if $req_op->name ne "require";
308
309 my $module;
310 if ($req_op->first->private & OPpCONST_BARE) {
311 # Actually it should always be a bareword
312 $module = $self->const_sv($req_op->first)->PV;
313 $module =~ s[/][::]g;
314 $module =~ s/.pm$//;
315 }
316 else {
317 $module = const($self->const_sv($req_op->first));
318 }
319
320 my $version;
321 my $version_op = $req_op->sibling;
322 return if class($version_op) eq "NULL";
323 if ($version_op->name eq "lineseq") {
324 # We have a version parameter; skip nextstate & pushmark
325 my $constop = $version_op->first->next->next;
326
327 return unless $self->const_sv($constop)->PV eq $module;
328 $constop = $constop->sibling;
34a48b4b
RH
329 $version = $self->const_sv($constop)->int_value;
330 $constop = $constop->sibling;
331 return if $constop->name ne "method_named";
332 return if $self->const_sv($constop)->PV ne "VERSION";
333 }
334
335 $lineseq = $version_op->sibling;
336 return if $lineseq->name ne "lineseq";
337 my $entersub = $lineseq->first->sibling;
338 if ($entersub->name eq "stub") {
339 return "use $module $version ();\n" if defined $version;
340 return "use $module ();\n";
341 }
342 return if $entersub->name ne "entersub";
343
344 # See if there are import arguments
345 my $args = '';
346
6ec152c3
RH
347 my $svop = $entersub->first->sibling; # Skip over pushmark
348 return unless $self->const_sv($svop)->PV eq $module;
34a48b4b
RH
349
350 # Pull out the arguments
6ec152c3
RH
351 for ($svop=$svop->sibling; $svop->name ne "method_named";
352 $svop = $svop->sibling) {
34a48b4b 353 $args .= ", " if length($args);
6ec152c3 354 $args .= $self->deparse($svop, 6);
34a48b4b
RH
355 }
356
357 my $use = 'use';
6ec152c3 358 my $method_named = $svop;
34a48b4b
RH
359 return if $method_named->name ne "method_named";
360 my $method_name = $self->const_sv($method_named)->PV;
361
362 if ($method_name eq "unimport") {
363 $use = 'no';
364 }
365
366 # Certain pragmas are dealt with using hint bits,
367 # so we ignore them here
368 if ($module eq 'strict' || $module eq 'integer'
0e7fe0f0 369 || $module eq 'bytes' || $module eq 'warnings') {
34a48b4b
RH
370 return "";
371 }
372
373 if (defined $version && length $args) {
374 return "$use $module $version ($args);\n";
375 } elsif (defined $version) {
376 return "$use $module $version;\n";
377 } elsif (length $args) {
378 return "$use $module ($args);\n";
379 } else {
380 return "$use $module;\n";
6e90668e
SM
381 }
382}
383
6e90668e 384sub stash_subs {
34a48b4b
RH
385 my ($self, $pack) = @_;
386 my (@ret, $stash);
387 if (!defined $pack) {
388 $pack = '';
389 $stash = \%::;
f5aa8f4e 390 }
34a48b4b
RH
391 else {
392 $pack =~ s/(::)?$/::/;
393 no strict 'refs';
394 $stash = \%$pack;
395 }
396 my %stash = svref_2object($stash)->ARRAY;
397 while (my ($key, $val) = each %stash) {
398 next if $key eq 'main::'; # avoid infinite recursion
f5aa8f4e
SM
399 my $class = class($val);
400 if ($class eq "PV") {
a0035eb8
RH
401 # Just a prototype. As an ugly but fairly effective way
402 # to find out if it belongs here is to see if the AUTOLOAD
403 # (if any) for the stash was defined in one of our files.
404 my $A = $stash{"AUTOLOAD"};
405 if (defined ($A) && class($A) eq "GV" && defined($A->CV)
406 && class($A->CV) eq "CV") {
407 my $AF = $A->FILE;
408 next unless $AF eq $0 || exists $self->{'files'}{$AF};
409 }
f5aa8f4e
SM
410 push @{$self->{'protos_todo'}}, [$pack . $key, $val->PV];
411 } elsif ($class eq "IV") {
a0035eb8
RH
412 # Just a name. As above.
413 my $A = $stash{"AUTOLOAD"};
414 if (defined ($A) && class($A) eq "GV" && defined($A->CV)
415 && class($A->CV) eq "CV") {
416 my $AF = $A->FILE;
417 next unless $AF eq $0 || exists $self->{'files'}{$AF};
418 }
f5aa8f4e
SM
419 push @{$self->{'protos_todo'}}, [$pack . $key, undef];
420 } elsif ($class eq "GV") {
34a48b4b 421 if (class(my $cv = $val->CV) ne "SPECIAL") {
f5aa8f4e 422 next if $self->{'subs_done'}{$$val}++;
e31885a0 423 next if $$val != ${$cv->GV}; # Ignore imposters
8510e997 424 $self->todo($cv, 0);
f5aa8f4e 425 }
e31885a0 426 if (class(my $cv = $val->FORM) ne "SPECIAL") {
f5aa8f4e 427 next if $self->{'forms_done'}{$$val}++;
e31885a0
RH
428 next if $$val != ${$cv->GV}; # Ignore imposters
429 $self->todo($cv, 1);
f5aa8f4e 430 }
34a48b4b
RH
431 if (class($val->HV) ne "SPECIAL" && $key =~ /::$/) {
432 $self->stash_subs($pack . $key);
433 }
6e90668e
SM
434 }
435 }
436}
a798dbf2 437
f5aa8f4e
SM
438sub print_protos {
439 my $self = shift;
440 my $ar;
441 my @ret;
442 foreach $ar (@{$self->{'protos_todo'}}) {
443 my $proto = (defined $ar->[1] ? " (". $ar->[1] . ")" : "");
444 push @ret, "sub " . $ar->[0] . "$proto;\n";
445 }
446 delete $self->{'protos_todo'};
447 return @ret;
448}
449
9d2c6865
SM
450sub style_opts {
451 my $self = shift;
452 my $opts = shift;
453 my $opt;
454 while (length($opt = substr($opts, 0, 1))) {
455 if ($opt eq "C") {
456 $self->{'cuddle'} = " ";
f4a44678
SM
457 $opts = substr($opts, 1);
458 } elsif ($opt eq "i") {
459 $opts =~ s/^i(\d+)//;
460 $self->{'indent_size'} = $1;
461 } elsif ($opt eq "T") {
462 $self->{'use_tabs'} = 1;
463 $opts = substr($opts, 1);
464 } elsif ($opt eq "v") {
465 $opts =~ s/^v([^.]*)(.|$)//;
466 $self->{'ex_const'} = $1;
9d2c6865 467 }
9d2c6865
SM
468 }
469}
470
f4a44678
SM
471sub new {
472 my $class = shift;
473 my $self = bless {}, $class;
474 $self->{'subs_todo'} = [];
34a48b4b 475 $self->{'files'} = {};
f4a44678 476 $self->{'curstash'} = "main";
34a48b4b 477 $self->{'curcop'} = undef;
f4a44678
SM
478 $self->{'cuddle'} = "\n";
479 $self->{'indent_size'} = 4;
480 $self->{'use_tabs'} = 0;
793e2a70
RH
481 $self->{'expand'} = 0;
482 $self->{'unquote'} = 0;
483 $self->{'linenums'} = 0;
484 $self->{'parens'} = 0;
f4a44678 485 $self->{'ex_const'} = "'???'";
08c6f5ec
RH
486
487 $self->{'ambient_arybase'} = 0;
e31885a0 488 $self->{'ambient_warnings'} = undef; # Assume no lexical warnings
a0405c92 489 $self->{'ambient_hints'} = 0;
08c6f5ec
RH
490 $self->init();
491
f4a44678 492 while (my $arg = shift @_) {
34a48b4b
RH
493 if ($arg =~ /^-f(.*)/) {
494 $self->{'files'}{$1} = 1;
f4a44678
SM
495 } elsif ($arg eq "-p") {
496 $self->{'parens'} = 1;
acaaef34
RGS
497 } elsif ($arg eq "-P") {
498 $self->{'noproto'} = 1;
f4a44678
SM
499 } elsif ($arg eq "-l") {
500 $self->{'linenums'} = 1;
501 } elsif ($arg eq "-q") {
502 $self->{'unquote'} = 1;
503 } elsif (substr($arg, 0, 2) eq "-s") {
504 $self->style_opts(substr $arg, 2);
58cccf98
SM
505 } elsif ($arg =~ /^-x(\d)$/) {
506 $self->{'expand'} = $1;
f4a44678
SM
507 }
508 }
509 return $self;
510}
511
810aef70
RH
512{
513 # Mask out the bits that L<warnings::register> uses
514 my $WARN_MASK;
515 BEGIN {
516 $WARN_MASK = $warnings::Bits{all} | $warnings::DeadBits{all};
517 }
518 sub WARN_MASK () {
519 return $WARN_MASK;
520 }
34a48b4b
RH
521}
522
08c6f5ec
RH
523# Initialise the contextual information, either from
524# defaults provided with the ambient_pragmas method,
525# or from perl's own defaults otherwise.
526sub init {
527 my $self = shift;
528
529 $self->{'arybase'} = $self->{'ambient_arybase'};
e31885a0
RH
530 $self->{'warnings'} = defined ($self->{'ambient_warnings'})
531 ? $self->{'ambient_warnings'} & WARN_MASK
532 : undef;
a0405c92 533 $self->{'hints'} = $self->{'ambient_hints'} & 0xFF;
217aba5d
RH
534
535 # also a convenient place to clear out subs_declared
536 delete $self->{'subs_declared'};
08c6f5ec
RH
537}
538
a798dbf2 539sub compile {
6e90668e
SM
540 my(@args) = @_;
541 return sub {
f4a44678 542 my $self = B::Deparse->new(@args);
d2bc402e
RGS
543 # First deparse command-line args
544 if (defined $^I) { # deparse -i
51a5edaf 545 print q(BEGIN { $^I = ).perlstring($^I).qq(; }\n);
d2bc402e
RGS
546 }
547 if ($^W) { # deparse -w
548 print qq(BEGIN { \$^W = $^W; }\n);
549 }
550 if ($/ ne "\n" or defined $O::savebackslash) { # deparse -l and -0
51a5edaf
RGS
551 my $fs = perlstring($/) || 'undef';
552 my $bs = perlstring($O::savebackslash) || 'undef';
d2bc402e
RGS
553 print qq(BEGIN { \$/ = $fs; \$\\ = $bs; }\n);
554 }
34a48b4b 555 my @BEGINs = B::begin_av->isa("B::AV") ? B::begin_av->ARRAY : ();
ece599bd 556 my @CHECKs = B::check_av->isa("B::AV") ? B::check_av->ARRAY : ();
34a48b4b
RH
557 my @INITs = B::init_av->isa("B::AV") ? B::init_av->ARRAY : ();
558 my @ENDs = B::end_av->isa("B::AV") ? B::end_av->ARRAY : ();
ece599bd 559 for my $block (@BEGINs, @CHECKs, @INITs, @ENDs) {
e31885a0 560 $self->todo($block, 0);
34a48b4b
RH
561 }
562 $self->stash_subs();
6e90668e 563 $self->{'curcv'} = main_cv;
8510e997 564 $self->{'curcvlex'} = undef;
f5aa8f4e 565 print $self->print_protos;
6e90668e 566 @{$self->{'subs_todo'}} =
f4a44678
SM
567 sort {$a->[0] <=> $b->[0]} @{$self->{'subs_todo'}};
568 print $self->indent($self->deparse(main_root, 0)), "\n"
569 unless null main_root;
6e90668e
SM
570 my @text;
571 while (scalar(@{$self->{'subs_todo'}})) {
572 push @text, $self->next_todo;
573 }
6f611a1a 574 print $self->indent(join("", @text)), "\n" if @text;
e31885a0
RH
575
576 # Print __DATA__ section, if necessary
577 no strict 'refs';
96c57f7e
RGS
578 my $laststash = defined $self->{'curcop'}
579 ? $self->{'curcop'}->stash->NAME : $self->{'curstash'};
580 if (defined *{$laststash."::DATA"}{IO}) {
e31885a0 581 print "__DATA__\n";
96c57f7e 582 print readline(*{$laststash."::DATA"});
e31885a0 583 }
a798dbf2 584 }
a798dbf2
MB
585}
586
f4a44678
SM
587sub coderef2text {
588 my $self = shift;
589 my $sub = shift;
0853f172 590 croak "Usage: ->coderef2text(CODEREF)" unless UNIVERSAL::isa($sub, "CODE");
08c6f5ec
RH
591
592 $self->init();
f4a44678
SM
593 return $self->indent($self->deparse_sub(svref_2object($sub)));
594}
595
08c6f5ec
RH
596sub ambient_pragmas {
597 my $self = shift;
e31885a0 598 my ($arybase, $hint_bits, $warning_bits) = (0, 0);
08c6f5ec
RH
599
600 while (@_ > 1) {
601 my $name = shift();
602 my $val = shift();
603
604 if ($name eq 'strict') {
605 require strict;
606
607 if ($val eq 'none') {
608 $hint_bits &= ~strict::bits(qw/refs subs vars/);
609 next();
610 }
611
612 my @names;
613 if ($val eq "all") {
614 @names = qw/refs subs vars/;
615 }
616 elsif (ref $val) {
617 @names = @$val;
618 }
619 else {
a0405c92 620 @names = split' ', $val;
08c6f5ec
RH
621 }
622 $hint_bits |= strict::bits(@names);
623 }
624
625 elsif ($name eq '$[') {
626 $arybase = $val;
627 }
628
a0405c92
RH
629 elsif ($name eq 'integer'
630 || $name eq 'bytes'
631 || $name eq 'utf8') {
632 require "$name.pm";
08c6f5ec 633 if ($val) {
a0405c92
RH
634 $hint_bits |= ${$::{"${name}::"}{"hint_bits"}};
635 }
636 else {
637 $hint_bits &= ~${$::{"${name}::"}{"hint_bits"}};
638 }
639 }
640
641 elsif ($name eq 're') {
642 require re;
643 if ($val eq 'none') {
2570cdf1 644 $hint_bits &= ~re::bits(qw/taint eval/);
a0405c92
RH
645 next();
646 }
647
648 my @names;
649 if ($val eq 'all') {
2570cdf1 650 @names = qw/taint eval/;
a0405c92
RH
651 }
652 elsif (ref $val) {
653 @names = @$val;
08c6f5ec
RH
654 }
655 else {
a0405c92 656 @names = split' ',$val;
08c6f5ec 657 }
a0405c92 658 $hint_bits |= re::bits(@names);
08c6f5ec
RH
659 }
660
661 elsif ($name eq 'warnings') {
08c6f5ec 662 if ($val eq 'none') {
810aef70 663 $warning_bits = $warnings::NONE;
08c6f5ec
RH
664 next();
665 }
666
667 my @names;
668 if (ref $val) {
669 @names = @$val;
670 }
671 else {
672 @names = split/\s+/, $val;
673 }
674
810aef70 675 $warning_bits = $warnings::NONE if !defined ($warning_bits);
08c6f5ec
RH
676 $warning_bits |= warnings::bits(@names);
677 }
678
679 elsif ($name eq 'warning_bits') {
680 $warning_bits = $val;
681 }
682
683 elsif ($name eq 'hint_bits') {
684 $hint_bits = $val;
685 }
686
687 else {
688 croak "Unknown pragma type: $name";
689 }
690 }
691 if (@_) {
692 croak "The ambient_pragmas method expects an even number of args";
693 }
694
695 $self->{'ambient_arybase'} = $arybase;
696 $self->{'ambient_warnings'} = $warning_bits;
a0405c92 697 $self->{'ambient_hints'} = $hint_bits;
08c6f5ec
RH
698}
699
6e90668e
SM
700sub deparse {
701 my $self = shift;
6ec152c3 702 my($op, $cx, $flags) = @_;
34a48b4b
RH
703
704 Carp::confess("Null op in deparse") if !defined($op)
705 || class($op) eq "NULL";
3f872cb9 706 my $meth = "pp_" . $op->name;
ce4e655d
RH
707 if (is_scope($op)) {
708 return $self->$meth($op, $cx, $flags);
6ec152c3 709 }
9d2c6865 710 return $self->$meth($op, $cx);
a798dbf2
MB
711}
712
6e90668e 713sub indent {
f4a44678 714 my $self = shift;
6e90668e
SM
715 my $txt = shift;
716 my @lines = split(/\n/, $txt);
717 my $leader = "";
f4a44678 718 my $level = 0;
6e90668e
SM
719 my $line;
720 for $line (@lines) {
f4a44678
SM
721 my $cmd = substr($line, 0, 1);
722 if ($cmd eq "\t" or $cmd eq "\b") {
723 $level += ($cmd eq "\t" ? 1 : -1) * $self->{'indent_size'};
724 if ($self->{'use_tabs'}) {
725 $leader = "\t" x ($level / 8) . " " x ($level % 8);
726 } else {
727 $leader = " " x $level;
728 }
6e90668e
SM
729 $line = substr($line, 1);
730 }
f5aa8f4e
SM
731 if (substr($line, 0, 1) eq "\f") {
732 $line = substr($line, 1); # no indent
733 } else {
734 $line = $leader . $line;
735 }
9d2c6865 736 $line =~ s/\cK;?//g;
6e90668e
SM
737 }
738 return join("\n", @lines);
739}
740
6e90668e
SM
741sub deparse_sub {
742 my $self = shift;
743 my $cv = shift;
744 my $proto = "";
ce4e655d 745Carp::confess("NULL in deparse_sub") if !defined($cv) || $cv->isa("B::NULL");
34a48b4b
RH
746Carp::confess("SPECIAL in deparse_sub") if $cv->isa("B::SPECIAL");
747 local $self->{'curcop'} = $self->{'curcop'};
6e90668e
SM
748 if ($cv->FLAGS & SVf_POK) {
749 $proto = "(". $cv->PV . ") ";
750 }
6aaf4108
SC
751 if ($cv->CvFLAGS & (CVf_METHOD|CVf_LOCKED|CVf_LVALUE)) {
752 $proto .= ": ";
753 $proto .= "lvalue " if $cv->CvFLAGS & CVf_LVALUE;
754 $proto .= "locked " if $cv->CvFLAGS & CVf_LOCKED;
755 $proto .= "method " if $cv->CvFLAGS & CVf_METHOD;
756 }
757
6e90668e 758 local($self->{'curcv'}) = $cv;
8510e997 759 local($self->{'curcvlex'});
a0405c92
RH
760 local(@$self{qw'curstash warnings hints'})
761 = @$self{qw'curstash warnings hints'};
ce4e655d 762 my $body;
6e90668e 763 if (not null $cv->ROOT) {
ce4e655d
RH
764 my $lineseq = $cv->ROOT->first;
765 if ($lineseq->name eq "lineseq") {
766 my @ops;
767 for(my$o=$lineseq->first; $$o; $o=$o->sibling) {
768 push @ops, $o;
769 }
770 $body = $self->lineseq(undef, @ops).";";
771 my $scope_en = $self->find_scope_en($lineseq);
772 if (defined $scope_en) {
773 my $subs = join"", $self->seq_subs($scope_en);
774 $body .= ";\n$subs" if length($subs);
775 }
776 }
777 else {
778 $body = $self->deparse($cv->ROOT->first, 0);
779 }
de3f1649 780 }
ce4e655d
RH
781 else {
782 my $sv = $cv->const_sv;
783 if ($$sv) {
784 # uh-oh. inlinable sub... format it differently
785 return $proto . "{ " . const($sv) . " }\n";
786 } else { # XSUB? (or just a declaration)
787 return "$proto;\n";
788 }
6e90668e 789 }
ce4e655d 790 return $proto ."{\n\t$body\n\b}" ."\n";
6e90668e
SM
791}
792
793sub deparse_format {
794 my $self = shift;
795 my $form = shift;
796 my @text;
797 local($self->{'curcv'}) = $form;
8510e997 798 local($self->{'curcvlex'});
67fc2416 799 local($self->{'in_format'}) = 1;
a0405c92 800 local(@$self{qw'curstash warnings hints'})
67fc2416 801 = @$self{qw'curstash warnings hints'};
6e90668e
SM
802 my $op = $form->ROOT;
803 my $kid;
fb725297
RGS
804 return "\f." if $op->first->name eq 'stub'
805 || $op->first->name eq 'nextstate';
6e90668e
SM
806 $op = $op->first->first; # skip leavewrite, lineseq
807 while (not null $op) {
808 $op = $op->sibling; # skip nextstate
809 my @exprs;
810 $kid = $op->first->sibling; # skip pushmark
a5b0cd91 811 push @text, "\f".$self->const_sv($kid)->PV;
6e90668e
SM
812 $kid = $kid->sibling;
813 for (; not null $kid; $kid = $kid->sibling) {
9d2c6865 814 push @exprs, $self->deparse($kid, 0);
6e90668e 815 }
a5b0cd91 816 push @text, "\f".join(", ", @exprs)."\n" if @exprs;
6e90668e
SM
817 $op = $op->sibling;
818 }
a5b0cd91 819 return join("", @text) . "\f.";
6e90668e
SM
820}
821
6e90668e 822sub is_scope {
a798dbf2 823 my $op = shift;
3f872cb9
GS
824 return $op->name eq "leave" || $op->name eq "scope"
825 || $op->name eq "lineseq"
826 || ($op->name eq "null" && class($op) eq "UNOP"
827 && (is_scope($op->first) || $op->first->name eq "enter"));
6e90668e
SM
828}
829
830sub is_state {
3f872cb9
GS
831 my $name = $_[0]->name;
832 return $name eq "nextstate" || $name eq "dbstate" || $name eq "setstate";
6e90668e
SM
833}
834
835sub is_miniwhile { # check for one-line loop (`foo() while $y--')
836 my $op = shift;
837 return (!null($op) and null($op->sibling)
3f872cb9
GS
838 and $op->name eq "null" and class($op) eq "UNOP"
839 and (($op->first->name =~ /^(and|or)$/
840 and $op->first->first->sibling->name eq "lineseq")
841 or ($op->first->name eq "lineseq"
6e90668e 842 and not null $op->first->first->sibling
3f872cb9 843 and $op->first->first->sibling->name eq "unstack")
6e90668e
SM
844 ));
845}
846
847sub is_scalar {
848 my $op = shift;
3f872cb9
GS
849 return ($op->name eq "rv2sv" or
850 $op->name eq "padsv" or
851 $op->name eq "gv" or # only in array/hash constructs
bd0865ec 852 $op->flags & OPf_KIDS && !null($op->first)
3f872cb9 853 && $op->first->name eq "gvsv");
6e90668e
SM
854}
855
9d2c6865
SM
856sub maybe_parens {
857 my $self = shift;
858 my($text, $cx, $prec) = @_;
859 if ($prec < $cx # unary ops nest just fine
860 or $prec == $cx and $cx != 4 and $cx != 16 and $cx != 21
861 or $self->{'parens'})
862 {
863 $text = "($text)";
864 # In a unop, let parent reuse our parens; see maybe_parens_unop
865 $text = "\cS" . $text if $cx == 16;
866 return $text;
867 } else {
868 return $text;
869 }
870}
871
872# same as above, but get around the `if it looks like a function' rule
873sub maybe_parens_unop {
874 my $self = shift;
875 my($name, $kid, $cx) = @_;
876 if ($cx > 16 or $self->{'parens'}) {
a0035eb8
RH
877 $kid = $self->deparse($kid, 1);
878 if ($name eq "umask" && $kid =~ /^\d+$/) {
879 $kid = sprintf("%#o", $kid);
880 }
881 return "$name($kid)";
9d2c6865
SM
882 } else {
883 $kid = $self->deparse($kid, 16);
a0035eb8
RH
884 if ($name eq "umask" && $kid =~ /^\d+$/) {
885 $kid = sprintf("%#o", $kid);
886 }
9d2c6865
SM
887 if (substr($kid, 0, 1) eq "\cS") {
888 # use kid's parens
889 return $name . substr($kid, 1);
890 } elsif (substr($kid, 0, 1) eq "(") {
891 # avoid looks-like-a-function trap with extra parens
892 # (`+' can lead to ambiguities)
893 return "$name(" . $kid . ")";
894 } else {
895 return "$name $kid";
896 }
897 }
898}
899
900sub maybe_parens_func {
901 my $self = shift;
902 my($func, $text, $cx, $prec) = @_;
903 if ($prec <= $cx or substr($text, 0, 1) eq "(" or $self->{'parens'}) {
904 return "$func($text)";
905 } else {
906 return "$func $text";
907 }
908}
909
6e90668e
SM
910sub maybe_local {
911 my $self = shift;
9d2c6865 912 my($op, $cx, $text) = @_;
ce4e655d
RH
913 my $our_intro = ($op->name =~ /^(gv|rv2)[ash]v$/) ? OPpOUR_INTRO : 0;
914 if ($op->private & (OPpLVAL_INTRO|$our_intro)
915 and not $self->{'avoid_local'}{$$op}) {
916 my $our_local = ($op->private & OPpLVAL_INTRO) ? "local" : "our";
e8d3f51b 917 if (want_scalar($op)) {
ce4e655d 918 return "$our_local $text";
e8d3f51b 919 } else {
ce4e655d 920 return $self->maybe_parens_func("$our_local", $text, $cx, 16);
e8d3f51b 921 }
6e90668e
SM
922 } else {
923 return $text;
a798dbf2 924 }
a798dbf2
MB
925}
926
3ed82cfc
GS
927sub maybe_targmy {
928 my $self = shift;
929 my($op, $cx, $func, @args) = @_;
930 if ($op->private & OPpTARGET_MY) {
931 my $var = $self->padname($op->targ);
932 my $val = $func->($self, $op, 7, @args);
933 return $self->maybe_parens("$var = $val", $cx, 7);
934 } else {
935 return $func->($self, $op, $cx, @args);
936 }
937}
938
6e90668e
SM
939sub padname_sv {
940 my $self = shift;
941 my $targ = shift;
942 return (($self->{'curcv'}->PADLIST->ARRAY)[0]->ARRAY)[$targ];
943}
944
945sub maybe_my {
946 my $self = shift;
9d2c6865 947 my($op, $cx, $text) = @_;
4c1f658f 948 if ($op->private & OPpLVAL_INTRO and not $self->{'avoid_local'}{$$op}) {
e8d3f51b
RH
949 if (want_scalar($op)) {
950 return "my $text";
951 } else {
952 return $self->maybe_parens_func("my", $text, $cx, 16);
953 }
6e90668e
SM
954 } else {
955 return $text;
956 }
957}
958
9d2c6865
SM
959# The following OPs don't have functions:
960
961# pp_padany -- does not exist after parsing
9d2c6865 962
2ae48fff
RGS
963sub AUTOLOAD {
964 if ($AUTOLOAD =~ s/^.*::pp_//) {
965 warn "unexpected OP_".uc $AUTOLOAD;
966 return "XXX";
967 } else {
968 die "Undefined subroutine $AUTOLOAD called";
969 }
9d2c6865 970}
6e90668e 971
611c1e95
IZ
972sub DESTROY {} # Do not AUTOLOAD
973
ce4e655d
RH
974# $root should be the op which represents the root of whatever
975# we're sequencing here. If it's undefined, then we don't append
976# any subroutine declarations to the deparsed ops, otherwise we
977# append appropriate declarations.
58cccf98 978sub lineseq {
ce4e655d 979 my($self, $root, @ops) = @_;
58cccf98 980 my($expr, @exprs);
ce4e655d
RH
981
982 my $out_cop = $self->{'curcop'};
983 my $out_seq = defined($out_cop) ? $out_cop->cop_seq : undef;
984 my $limit_seq;
985 if (defined $root) {
986 $limit_seq = $out_seq;
987 my $nseq = $self->find_scope_st($root->sibling) if ${$root->sibling};
988 $limit_seq = $nseq if !defined($limit_seq)
989 or defined($nseq) && $nseq < $limit_seq;
990 }
991 $limit_seq = $self->{'limit_seq'}
992 if defined($self->{'limit_seq'})
993 && (!defined($limit_seq) || $self->{'limit_seq'} < $limit_seq);
994 local $self->{'limit_seq'} = $limit_seq;
58cccf98 995 for (my $i = 0; $i < @ops; $i++) {
6e90668e 996 $expr = "";
58cccf98
SM
997 if (is_state $ops[$i]) {
998 $expr = $self->deparse($ops[$i], 0);
999 $i++;
e99ebc55
RH
1000 if ($i > $#ops) {
1001 push @exprs, $expr;
1002 last;
1003 }
58cccf98 1004 }
c73811ab
RH
1005 if (!is_state $ops[$i] and (my $ls = $ops[$i+1]) and
1006 !null($ops[$i+1]) and $ops[$i+1]->name eq "lineseq")
58cccf98 1007 {
c73811ab
RH
1008 if ($ls->first && !null($ls->first) && is_state($ls->first)
1009 && (my $sib = $ls->first->sibling)) {
1010 if (!null($sib) && $sib->name eq "leaveloop") {
1011 push @exprs, $expr . $self->for_loop($ops[$i], 0);
1012 $i++;
1013 next;
1014 }
1015 }
6e90668e 1016 }
6ec152c3 1017 $expr .= $self->deparse($ops[$i], 0, (@ops != 1));
e99ebc55 1018 $expr =~ s/;\n?\z//;
f99a63a2 1019 push @exprs, $expr;
6e90668e 1020 }
ce4e655d
RH
1021 my $body = join(";\n", grep {length} @exprs);
1022 my $subs = "";
67fc2416 1023 if (defined $root && defined $limit_seq && !$self->{'in_format'}) {
ce4e655d
RH
1024 $subs = join "\n", $self->seq_subs($limit_seq);
1025 }
1026 return join(";\n", grep {length} $body, $subs);
6e90668e
SM
1027}
1028
58cccf98 1029sub scopeop {
ce4e655d 1030 my($real_block, $self, $op, $cx, $flags) = @_;
58cccf98
SM
1031 my $kid;
1032 my @kids;
a0405c92
RH
1033
1034 local(@$self{qw'curstash warnings hints'})
1035 = @$self{qw'curstash warnings hints'} if $real_block;
58cccf98
SM
1036 if ($real_block) {
1037 $kid = $op->first->sibling; # skip enter
1038 if (is_miniwhile($kid)) {
1039 my $top = $kid->first;
1040 my $name = $top->name;
1041 if ($name eq "and") {
1042 $name = "while";
1043 } elsif ($name eq "or") {
1044 $name = "until";
1045 } else { # no conditional -> while 1 or until 0
1046 return $self->deparse($top->first, 1) . " while 1";
1047 }
1048 my $cond = $top->first;
1049 my $body = $cond->sibling->first; # skip lineseq
1050 $cond = $self->deparse($cond, 1);
1051 $body = $self->deparse($body, 1);
1052 return "$body $name $cond";
6e90668e 1053 }
58cccf98
SM
1054 } else {
1055 $kid = $op->first;
1056 }
1057 for (; !null($kid); $kid = $kid->sibling) {
1058 push @kids, $kid;
6e90668e 1059 }
ce4e655d
RH
1060 if ($flags || $cx > 0) { # inside an expression, (a do {} while for lineseq)
1061 return "do {\n\t" . $self->lineseq($op, @kids) . "\n\b}";
9d2c6865 1062 } else {
ce4e655d 1063 my $lineseq = $self->lineseq($op, @kids);
7a9b44b9 1064 return (length ($lineseq) ? "$lineseq;" : "");
6e90668e 1065 }
6e90668e
SM
1066}
1067
ce4e655d 1068sub pp_scope { scopeop(0, @_); }
58cccf98
SM
1069sub pp_lineseq { scopeop(0, @_); }
1070sub pp_leave { scopeop(1, @_); }
9d2c6865 1071
6e90668e
SM
1072# The BEGIN {} is used here because otherwise this code isn't executed
1073# when you run B::Deparse on itself.
1074my %globalnames;
1075BEGIN { map($globalnames{$_}++, "SIG", "STDIN", "STDOUT", "STDERR", "INC",
1076 "ENV", "ARGV", "ARGVOUT", "_"); }
1077
1078sub gv_name {
1079 my $self = shift;
1080 my $gv = shift;
34a48b4b 1081Carp::confess() if $gv->isa("B::CV");
6e90668e 1082 my $stash = $gv->STASH->NAME;
d9963e60 1083 my $name = $gv->SAFENAME;
5c55e82c
HS
1084 if (($stash eq 'main' && $globalnames{$name})
1085 or ($stash eq $self->{'curstash'} && !$globalnames{$name})
9d2c6865
SM
1086 or $name =~ /^[^A-Za-z_]/)
1087 {
6e90668e
SM
1088 $stash = "";
1089 } else {
1090 $stash = $stash . "::";
a798dbf2 1091 }
083bda02
MS
1092 if ($name =~ /^(\^..|{)/) {
1093 $name = "{$name}"; # ${^WARNING_BITS}, etc and ${
6e90668e
SM
1094 }
1095 return $stash . $name;
a798dbf2
MB
1096}
1097
8510e997
RH
1098# Return the name to use for a stash variable.
1099# If a lexical with the same name is in scope, it may need to be
1100# fully-qualified.
1101sub stash_variable {
1102 my ($self, $prefix, $name) = @_;
1103
1104 return "$prefix$name" if $name =~ /::/;
1105
1106 unless ($prefix eq '$' || $prefix eq '@' ||
1107 $prefix eq '%' || $prefix eq '$#') {
1108 return "$prefix$name";
1109 }
1110
1111 my $v = ($prefix eq '$#' ? '@' : $prefix) . $name;
1112 return $prefix .$self->{'curstash'}.'::'. $name if $self->lex_in_scope($v);
1113 return "$prefix$name";
1114}
1115
1116sub lex_in_scope {
1117 my ($self, $name) = @_;
1118 $self->populate_curcvlex() if !defined $self->{'curcvlex'};
1119
6ec152c3 1120 return 0 if !defined($self->{'curcop'});
8510e997
RH
1121 my $seq = $self->{'curcop'}->cop_seq;
1122 return 0 if !exists $self->{'curcvlex'}{$name};
1123 for my $a (@{$self->{'curcvlex'}{$name}}) {
1124 my ($st, $en) = @$a;
1125 return 1 if $seq > $st && $seq <= $en;
1126 }
1127 return 0;
1128}
1129
1130sub populate_curcvlex {
1131 my $self = shift;
ce4e655d 1132 for (my $cv = $self->{'curcv'}; class($cv) eq "CV"; $cv = $cv->OUTSIDE) {
7dafbf52
DM
1133 my $padlist = $cv->PADLIST;
1134 # an undef CV still in lexical chain
1135 next if class($padlist) eq "SPECIAL";
1136 my @padlist = $padlist->ARRAY;
8510e997
RH
1137 my @ns = $padlist[0]->ARRAY;
1138
1139 for (my $i=0; $i<@ns; ++$i) {
1140 next if class($ns[$i]) eq "SPECIAL";
ce4e655d 1141 next if $ns[$i]->FLAGS & SVpad_OUR; # Skip "our" vars
0f2fe21d
RH
1142 if (class($ns[$i]) eq "PV") {
1143 # Probably that pesky lexical @_
1144 next;
1145 }
8510e997 1146 my $name = $ns[$i]->PVX;
7dafbf52
DM
1147 my ($seq_st, $seq_en) =
1148 ($ns[$i]->FLAGS & SVf_FAKE)
1149 ? (0, 999999)
1150 : ($ns[$i]->NVX, $ns[$i]->IVX);
8510e997
RH
1151
1152 push @{$self->{'curcvlex'}{$name}}, [$seq_st, $seq_en];
1153 }
1154 }
1155}
1156
ce4e655d
RH
1157sub find_scope_st { ((find_scope(@_))[0]); }
1158sub find_scope_en { ((find_scope(@_))[1]); }
1159
1160# Recurses down the tree, looking for pad variable introductions and COPs
1161sub find_scope {
1162 my ($self, $op, $scope_st, $scope_en) = @_;
ff97752d 1163 carp("Undefined op in find_scope") if !defined $op;
ce4e655d
RH
1164 return ($scope_st, $scope_en) unless $op->flags & OPf_KIDS;
1165
1166 for (my $o=$op->first; $$o; $o=$o->sibling) {
1167 if ($o->name =~ /^pad.v$/ && $o->private & OPpLVAL_INTRO) {
1168 my $s = int($self->padname_sv($o->targ)->NVX);
1169 my $e = $self->padname_sv($o->targ)->IVX;
1170 $scope_st = $s if !defined($scope_st) || $s < $scope_st;
1171 $scope_en = $e if !defined($scope_en) || $e > $scope_en;
1172 }
1173 elsif (is_state($o)) {
1174 my $c = $o->cop_seq;
1175 $scope_st = $c if !defined($scope_st) || $c < $scope_st;
1176 $scope_en = $c if !defined($scope_en) || $c > $scope_en;
1177 }
1178 elsif ($o->flags & OPf_KIDS) {
1179 ($scope_st, $scope_en) =
1180 $self->find_scope($o, $scope_st, $scope_en)
34a48b4b
RH
1181 }
1182 }
ce4e655d
RH
1183
1184 return ($scope_st, $scope_en);
34a48b4b
RH
1185}
1186
1187# Returns a list of subs which should be inserted before the COP
1188sub cop_subs {
1189 my ($self, $op, $out_seq) = @_;
1190 my $seq = $op->cop_seq;
1191 # If we have nephews, then our sequence number indicates
1192 # the cop_seq of the end of some sort of scope.
1193 if (class($op->sibling) ne "NULL" && $op->sibling->flags & OPf_KIDS
ce4e655d
RH
1194 and my $nseq = $self->find_scope_st($op->sibling) ) {
1195 $seq = $nseq;
34a48b4b
RH
1196 }
1197 $seq = $out_seq if defined($out_seq) && $out_seq < $seq;
1198 return $self->seq_subs($seq);
1199}
1200
1201sub seq_subs {
1202 my ($self, $seq) = @_;
1203 my @text;
1204#push @text, "# ($seq)\n";
1205
ce4e655d 1206 return "" if !defined $seq;
34a48b4b
RH
1207 while (scalar(@{$self->{'subs_todo'}})
1208 and $seq > $self->{'subs_todo'}[0][0]) {
1209 push @text, $self->next_todo;
1210 }
1211 return @text;
1212}
1213
08c6f5ec 1214# Notice how subs and formats are inserted between statements here;
a0405c92 1215# also $[ assignments and pragmas.
6e90668e
SM
1216sub pp_nextstate {
1217 my $self = shift;
9d2c6865 1218 my($op, $cx) = @_;
34a48b4b 1219 $self->{'curcop'} = $op;
6e90668e 1220 my @text;
34a48b4b 1221 push @text, $self->cop_subs($op);
e99ebc55 1222 push @text, $op->label . ": " if $op->label;
11faa288 1223 my $stash = $op->stashpv;
6e90668e
SM
1224 if ($stash ne $self->{'curstash'}) {
1225 push @text, "package $stash;\n";
1226 $self->{'curstash'} = $stash;
1227 }
f5aa8f4e
SM
1228 if ($self->{'linenums'}) {
1229 push @text, "\f#line " . $op->line .
57843af0 1230 ' "' . $op->file, qq'"\n';
f5aa8f4e 1231 }
08c6f5ec 1232
7a9b44b9
RH
1233 if ($self->{'arybase'} != $op->arybase) {
1234 push @text, '$[ = '. $op->arybase .";\n";
1235 $self->{'arybase'} = $op->arybase;
1236 }
1237
1238 my $warnings = $op->warnings;
1239 my $warning_bits;
1240 if ($warnings->isa("B::SPECIAL") && $$warnings == 4) {
810aef70 1241 $warning_bits = $warnings::Bits{"all"} & WARN_MASK;
7a9b44b9 1242 }
e31885a0 1243 elsif ($warnings->isa("B::SPECIAL") && $$warnings == 5) {
810aef70 1244 $warning_bits = $warnings::NONE;
7a9b44b9 1245 }
e31885a0
RH
1246 elsif ($warnings->isa("B::SPECIAL")) {
1247 $warning_bits = undef;
1248 }
7a9b44b9 1249 else {
34a48b4b 1250 $warning_bits = $warnings->PV & WARN_MASK;
7a9b44b9
RH
1251 }
1252
e31885a0
RH
1253 if (defined ($warning_bits) and
1254 !defined($self->{warnings}) || $self->{'warnings'} ne $warning_bits) {
08c6f5ec 1255 push @text, declare_warnings($self->{'warnings'}, $warning_bits);
7a9b44b9
RH
1256 $self->{'warnings'} = $warning_bits;
1257 }
1258
a0405c92
RH
1259 if ($self->{'hints'} != $op->private) {
1260 push @text, declare_hints($self->{'hints'}, $op->private);
1261 $self->{'hints'} = $op->private;
1262 }
1263
6e90668e
SM
1264 return join("", @text);
1265}
1266
08c6f5ec
RH
1267sub declare_warnings {
1268 my ($from, $to) = @_;
6ec152c3 1269 if (($to & WARN_MASK) eq warnings::bits("all")) {
a0405c92
RH
1270 return "use warnings;\n";
1271 }
6ec152c3 1272 elsif (($to & WARN_MASK) eq "\0"x length($to)) {
a0405c92
RH
1273 return "no warnings;\n";
1274 }
51a5edaf 1275 return "BEGIN {\${^WARNING_BITS} = ".perlstring($to)."}\n";
a0405c92
RH
1276}
1277
1278sub declare_hints {
1279 my ($from, $to) = @_;
a0035eb8
RH
1280 my $use = $to & ~$from;
1281 my $no = $from & ~$to;
1282 my $decls = "";
1283 for my $pragma (hint_pragmas($use)) {
1284 $decls .= "use $pragma;\n";
1285 }
1286 for my $pragma (hint_pragmas($no)) {
1287 $decls .= "no $pragma;\n";
1288 }
1289 return $decls;
1290}
1291
1292sub hint_pragmas {
1293 my ($bits) = @_;
1294 my @pragmas;
1295 push @pragmas, "integer" if $bits & 0x1;
1296 push @pragmas, "strict 'refs'" if $bits & 0x2;
1297 push @pragmas, "bytes" if $bits & 0x8;
1298 return @pragmas;
08c6f5ec
RH
1299}
1300
6e90668e 1301sub pp_dbstate { pp_nextstate(@_) }
3f872cb9 1302sub pp_setstate { pp_nextstate(@_) }
6e90668e
SM
1303
1304sub pp_unstack { return "" } # see also leaveloop
1305
1306sub baseop {
1307 my $self = shift;
9d2c6865 1308 my($op, $cx, $name) = @_;
6e90668e
SM
1309 return $name;
1310}
1311
e99ebc55
RH
1312sub pp_stub {
1313 my $self = shift;
1314 my($op, $cx, $name) = @_;
1315 if ($cx) {
1316 return "()";
1317 }
1318 else {
1319 return "();";
1320 }
1321}
6e90668e
SM
1322sub pp_wantarray { baseop(@_, "wantarray") }
1323sub pp_fork { baseop(@_, "fork") }
3ed82cfc
GS
1324sub pp_wait { maybe_targmy(@_, \&baseop, "wait") }
1325sub pp_getppid { maybe_targmy(@_, \&baseop, "getppid") }
1326sub pp_time { maybe_targmy(@_, \&baseop, "time") }
6e90668e
SM
1327sub pp_tms { baseop(@_, "times") }
1328sub pp_ghostent { baseop(@_, "gethostent") }
1329sub pp_gnetent { baseop(@_, "getnetent") }
1330sub pp_gprotoent { baseop(@_, "getprotoent") }
1331sub pp_gservent { baseop(@_, "getservent") }
1332sub pp_ehostent { baseop(@_, "endhostent") }
1333sub pp_enetent { baseop(@_, "endnetent") }
1334sub pp_eprotoent { baseop(@_, "endprotoent") }
1335sub pp_eservent { baseop(@_, "endservent") }
1336sub pp_gpwent { baseop(@_, "getpwent") }
1337sub pp_spwent { baseop(@_, "setpwent") }
1338sub pp_epwent { baseop(@_, "endpwent") }
1339sub pp_ggrent { baseop(@_, "getgrent") }
1340sub pp_sgrent { baseop(@_, "setgrent") }
1341sub pp_egrent { baseop(@_, "endgrent") }
1342sub pp_getlogin { baseop(@_, "getlogin") }
1343
1344sub POSTFIX () { 1 }
1345
9d2c6865
SM
1346# I couldn't think of a good short name, but this is the category of
1347# symbolic unary operators with interesting precedence
1348
1349sub pfixop {
1350 my $self = shift;
1351 my($op, $cx, $name, $prec, $flags) = (@_, 0);
1352 my $kid = $op->first;
1353 $kid = $self->deparse($kid, $prec);
1354 return $self->maybe_parens(($flags & POSTFIX) ? "$kid$name" : "$name$kid",
1355 $cx, $prec);
1356}
1357
1358sub pp_preinc { pfixop(@_, "++", 23) }
1359sub pp_predec { pfixop(@_, "--", 23) }
3ed82cfc
GS
1360sub pp_postinc { maybe_targmy(@_, \&pfixop, "++", 23, POSTFIX) }
1361sub pp_postdec { maybe_targmy(@_, \&pfixop, "--", 23, POSTFIX) }
9d2c6865
SM
1362sub pp_i_preinc { pfixop(@_, "++", 23) }
1363sub pp_i_predec { pfixop(@_, "--", 23) }
3ed82cfc
GS
1364sub pp_i_postinc { maybe_targmy(@_, \&pfixop, "++", 23, POSTFIX) }
1365sub pp_i_postdec { maybe_targmy(@_, \&pfixop, "--", 23, POSTFIX) }
68cc8748 1366sub pp_complement { maybe_targmy(@_, \&pfixop, "~", 21) }
9d2c6865 1367
3ed82cfc
GS
1368sub pp_negate { maybe_targmy(@_, \&real_negate) }
1369sub real_negate {
9d2c6865
SM
1370 my $self = shift;
1371 my($op, $cx) = @_;
3f872cb9 1372 if ($op->first->name =~ /^(i_)?negate$/) {
9d2c6865
SM
1373 # avoid --$x
1374 $self->pfixop($op, $cx, "-", 21.5);
1375 } else {
1376 $self->pfixop($op, $cx, "-", 21);
1377 }
1378}
1379sub pp_i_negate { pp_negate(@_) }
1380
1381sub pp_not {
1382 my $self = shift;
1383 my($op, $cx) = @_;
1384 if ($cx <= 4) {
1385 $self->pfixop($op, $cx, "not ", 4);
1386 } else {
1387 $self->pfixop($op, $cx, "!", 21);
1388 }
1389}
1390
6e90668e
SM
1391sub unop {
1392 my $self = shift;
f4a44678 1393 my($op, $cx, $name) = @_;
6e90668e 1394 my $kid;
9d2c6865 1395 if ($op->flags & OPf_KIDS) {
6e90668e 1396 $kid = $op->first;
e31885a0
RH
1397 if (defined prototype("CORE::$name")
1398 && prototype("CORE::$name") =~ /^;?\*/
1399 && $kid->name eq "rv2gv") {
1400 $kid = $kid->first;
1401 }
1402
9d2c6865 1403 return $self->maybe_parens_unop($name, $kid, $cx);
6e90668e 1404 } else {
9d2c6865 1405 return $name . ($op->flags & OPf_SPECIAL ? "()" : "");
6e90668e 1406 }
6e90668e
SM
1407}
1408
3ed82cfc
GS
1409sub pp_chop { maybe_targmy(@_, \&unop, "chop") }
1410sub pp_chomp { maybe_targmy(@_, \&unop, "chomp") }
1411sub pp_schop { maybe_targmy(@_, \&unop, "chop") }
1412sub pp_schomp { maybe_targmy(@_, \&unop, "chomp") }
6e90668e
SM
1413sub pp_defined { unop(@_, "defined") }
1414sub pp_undef { unop(@_, "undef") }
1415sub pp_study { unop(@_, "study") }
6e90668e
SM
1416sub pp_ref { unop(@_, "ref") }
1417sub pp_pos { maybe_local(@_, unop(@_, "pos")) }
1418
3ed82cfc
GS
1419sub pp_sin { maybe_targmy(@_, \&unop, "sin") }
1420sub pp_cos { maybe_targmy(@_, \&unop, "cos") }
1421sub pp_rand { maybe_targmy(@_, \&unop, "rand") }
6e90668e 1422sub pp_srand { unop(@_, "srand") }
3ed82cfc
GS
1423sub pp_exp { maybe_targmy(@_, \&unop, "exp") }
1424sub pp_log { maybe_targmy(@_, \&unop, "log") }
1425sub pp_sqrt { maybe_targmy(@_, \&unop, "sqrt") }
1426sub pp_int { maybe_targmy(@_, \&unop, "int") }
1427sub pp_hex { maybe_targmy(@_, \&unop, "hex") }
1428sub pp_oct { maybe_targmy(@_, \&unop, "oct") }
1429sub pp_abs { maybe_targmy(@_, \&unop, "abs") }
1430
1431sub pp_length { maybe_targmy(@_, \&unop, "length") }
1432sub pp_ord { maybe_targmy(@_, \&unop, "ord") }
1433sub pp_chr { maybe_targmy(@_, \&unop, "chr") }
6e90668e
SM
1434
1435sub pp_each { unop(@_, "each") }
1436sub pp_values { unop(@_, "values") }
1437sub pp_keys { unop(@_, "keys") }
1438sub pp_pop { unop(@_, "pop") }
1439sub pp_shift { unop(@_, "shift") }
1440
1441sub pp_caller { unop(@_, "caller") }
1442sub pp_reset { unop(@_, "reset") }
1443sub pp_exit { unop(@_, "exit") }
1444sub pp_prototype { unop(@_, "prototype") }
1445
1446sub pp_close { unop(@_, "close") }
1447sub pp_fileno { unop(@_, "fileno") }
1448sub pp_umask { unop(@_, "umask") }
6e90668e
SM
1449sub pp_untie { unop(@_, "untie") }
1450sub pp_tied { unop(@_, "tied") }
1451sub pp_dbmclose { unop(@_, "dbmclose") }
1452sub pp_getc { unop(@_, "getc") }
1453sub pp_eof { unop(@_, "eof") }
1454sub pp_tell { unop(@_, "tell") }
1455sub pp_getsockname { unop(@_, "getsockname") }
1456sub pp_getpeername { unop(@_, "getpeername") }
1457
3ed82cfc
GS
1458sub pp_chdir { maybe_targmy(@_, \&unop, "chdir") }
1459sub pp_chroot { maybe_targmy(@_, \&unop, "chroot") }
6e90668e 1460sub pp_readlink { unop(@_, "readlink") }
3ed82cfc 1461sub pp_rmdir { maybe_targmy(@_, \&unop, "rmdir") }
6e90668e
SM
1462sub pp_readdir { unop(@_, "readdir") }
1463sub pp_telldir { unop(@_, "telldir") }
1464sub pp_rewinddir { unop(@_, "rewinddir") }
1465sub pp_closedir { unop(@_, "closedir") }
3ed82cfc 1466sub pp_getpgrp { maybe_targmy(@_, \&unop, "getpgrp") }
6e90668e
SM
1467sub pp_localtime { unop(@_, "localtime") }
1468sub pp_gmtime { unop(@_, "gmtime") }
1469sub pp_alarm { unop(@_, "alarm") }
3ed82cfc 1470sub pp_sleep { maybe_targmy(@_, \&unop, "sleep") }
6e90668e
SM
1471
1472sub pp_dofile { unop(@_, "do") }
1473sub pp_entereval { unop(@_, "eval") }
1474
1475sub pp_ghbyname { unop(@_, "gethostbyname") }
1476sub pp_gnbyname { unop(@_, "getnetbyname") }
1477sub pp_gpbyname { unop(@_, "getprotobyname") }
1478sub pp_shostent { unop(@_, "sethostent") }
1479sub pp_snetent { unop(@_, "setnetent") }
1480sub pp_sprotoent { unop(@_, "setprotoent") }
1481sub pp_sservent { unop(@_, "setservent") }
1482sub pp_gpwnam { unop(@_, "getpwnam") }
1483sub pp_gpwuid { unop(@_, "getpwuid") }
1484sub pp_ggrnam { unop(@_, "getgrnam") }
1485sub pp_ggrgid { unop(@_, "getgrgid") }
1486
1487sub pp_lock { unop(@_, "lock") }
1488
1489sub pp_exists {
1490 my $self = shift;
9d2c6865 1491 my($op, $cx) = @_;
34a48b4b
RH
1492 my $arg;
1493 if ($op->private & OPpEXISTS_SUB) {
1494 # Checking for the existence of a subroutine
1495 return $self->maybe_parens_func("exists",
1496 $self->pp_rv2cv($op->first, 16), $cx, 16);
1497 }
1498 if ($op->flags & OPf_SPECIAL) {
1499 # Array element, not hash element
1500 return $self->maybe_parens_func("exists",
1501 $self->pp_aelem($op->first, 16), $cx, 16);
1502 }
9d2c6865
SM
1503 return $self->maybe_parens_func("exists", $self->pp_helem($op->first, 16),
1504 $cx, 16);
6e90668e
SM
1505}
1506
6e90668e
SM
1507sub pp_delete {
1508 my $self = shift;
9d2c6865 1509 my($op, $cx) = @_;
6e90668e
SM
1510 my $arg;
1511 if ($op->private & OPpSLICE) {
34a48b4b
RH
1512 if ($op->flags & OPf_SPECIAL) {
1513 # Deleting from an array, not a hash
1514 return $self->maybe_parens_func("delete",
1515 $self->pp_aslice($op->first, 16),
1516 $cx, 16);
1517 }
9d2c6865
SM
1518 return $self->maybe_parens_func("delete",
1519 $self->pp_hslice($op->first, 16),
1520 $cx, 16);
6e90668e 1521 } else {
34a48b4b
RH
1522 if ($op->flags & OPf_SPECIAL) {
1523 # Deleting from an array, not a hash
1524 return $self->maybe_parens_func("delete",
1525 $self->pp_aelem($op->first, 16),
1526 $cx, 16);
1527 }
9d2c6865
SM
1528 return $self->maybe_parens_func("delete",
1529 $self->pp_helem($op->first, 16),
1530 $cx, 16);
6e90668e 1531 }
6e90668e
SM
1532}
1533
6e90668e
SM
1534sub pp_require {
1535 my $self = shift;
9d2c6865 1536 my($op, $cx) = @_;
3f872cb9 1537 if (class($op) eq "UNOP" and $op->first->name eq "const"
4c1f658f 1538 and $op->first->private & OPpCONST_BARE)
6e90668e 1539 {
18228111 1540 my $name = $self->const_sv($op->first)->PV;
6e90668e
SM
1541 $name =~ s[/][::]g;
1542 $name =~ s/\.pm//g;
34a48b4b 1543 return "require $name";
6e90668e 1544 } else {
9d2c6865 1545 $self->unop($op, $cx, "require");
6e90668e
SM
1546 }
1547}
1548
9d2c6865
SM
1549sub pp_scalar {
1550 my $self = shift;
1551 my($op, $cv) = @_;
1552 my $kid = $op->first;
1553 if (not null $kid->sibling) {
1554 # XXX Was a here-doc
1555 return $self->dquote($op);
1556 }
1557 $self->unop(@_, "scalar");
1558}
1559
1560
6e90668e
SM
1561sub padval {
1562 my $self = shift;
1563 my $targ = shift;
1564 return (($self->{'curcv'}->PADLIST->ARRAY)[1]->ARRAY)[$targ];
1565}
1566
1567sub pp_refgen {
1568 my $self = shift;
9d2c6865 1569 my($op, $cx) = @_;
6e90668e 1570 my $kid = $op->first;
3f872cb9 1571 if ($kid->name eq "null") {
6e90668e 1572 $kid = $kid->first;
3f872cb9
GS
1573 if ($kid->name eq "anonlist" || $kid->name eq "anonhash") {
1574 my($pre, $post) = @{{"anonlist" => ["[","]"],
1575 "anonhash" => ["{","}"]}->{$kid->name}};
6e90668e
SM
1576 my($expr, @exprs);
1577 $kid = $kid->first->sibling; # skip pushmark
1578 for (; !null($kid); $kid = $kid->sibling) {
9d2c6865 1579 $expr = $self->deparse($kid, 6);
6e90668e
SM
1580 push @exprs, $expr;
1581 }
1582 return $pre . join(", ", @exprs) . $post;
1583 } elsif (!null($kid->sibling) and
3f872cb9 1584 $kid->sibling->name eq "anoncode") {
6e90668e
SM
1585 return "sub " .
1586 $self->deparse_sub($self->padval($kid->sibling->targ));
3f872cb9
GS
1587 } elsif ($kid->name eq "pushmark") {
1588 my $sib_name = $kid->sibling->name;
1589 if ($sib_name =~ /^(pad|rv2)[ah]v$/
c8c62db7
AD
1590 and not $kid->sibling->flags & OPf_REF)
1591 {
1592 # The @a in \(@a) isn't in ref context, but only when the
1593 # parens are there.
1594 return "\\(" . $self->deparse($kid->sibling, 1) . ")";
3f872cb9 1595 } elsif ($sib_name eq 'entersub') {
c8c62db7
AD
1596 my $text = $self->deparse($kid->sibling, 1);
1597 # Always show parens for \(&func()), but only with -p otherwise
1598 $text = "($text)" if $self->{'parens'}
1599 or $kid->sibling->private & OPpENTERSUB_AMPER;
1600 return "\\$text";
1601 }
1602 }
6e90668e 1603 }
9d2c6865 1604 $self->pfixop($op, $cx, "\\", 20);
6e90668e
SM
1605}
1606
1607sub pp_srefgen { pp_refgen(@_) }
1608
1609sub pp_readline {
1610 my $self = shift;
9d2c6865 1611 my($op, $cx) = @_;
6e90668e 1612 my $kid = $op->first;
3f872cb9 1613 $kid = $kid->first if $kid->name eq "rv2gv"; # <$fh>
e31885a0
RH
1614 return "<" . $self->deparse($kid, 1) . ">" if is_scalar($kid);
1615 return $self->unop($op, $cx, "readline");
6e90668e
SM
1616}
1617
ad8caead
RGS
1618sub pp_rcatline {
1619 my $self = shift;
1620 my($op) = @_;
1621 return "<" . $self->gv_name($op->gv) . ">";
1622}
1623
bd0865ec
GS
1624# Unary operators that can occur as pseudo-listops inside double quotes
1625sub dq_unop {
1626 my $self = shift;
1627 my($op, $cx, $name, $prec, $flags) = (@_, 0, 0);
1628 my $kid;
1629 if ($op->flags & OPf_KIDS) {
1630 $kid = $op->first;
1631 # If there's more than one kid, the first is an ex-pushmark.
1632 $kid = $kid->sibling if not null $kid->sibling;
1633 return $self->maybe_parens_unop($name, $kid, $cx);
1634 } else {
1635 return $name . ($op->flags & OPf_SPECIAL ? "()" : "");
1636 }
1637}
1638
1639sub pp_ucfirst { dq_unop(@_, "ucfirst") }
1640sub pp_lcfirst { dq_unop(@_, "lcfirst") }
1641sub pp_uc { dq_unop(@_, "uc") }
1642sub pp_lc { dq_unop(@_, "lc") }
3ed82cfc 1643sub pp_quotemeta { maybe_targmy(@_, \&dq_unop, "quotemeta") }
bd0865ec 1644
6e90668e
SM
1645sub loopex {
1646 my $self = shift;
9d2c6865 1647 my ($op, $cx, $name) = @_;
6e90668e 1648 if (class($op) eq "PVOP") {
9d2c6865
SM
1649 return "$name " . $op->pv;
1650 } elsif (class($op) eq "OP") {
1651 return $name;
6e90668e 1652 } elsif (class($op) eq "UNOP") {
9d2c6865
SM
1653 # Note -- loop exits are actually exempt from the
1654 # looks-like-a-func rule, but a few extra parens won't hurt
1655 return $self->maybe_parens_unop($name, $op->first, $cx);
6e90668e 1656 }
6e90668e
SM
1657}
1658
1659sub pp_last { loopex(@_, "last") }
1660sub pp_next { loopex(@_, "next") }
1661sub pp_redo { loopex(@_, "redo") }
1662sub pp_goto { loopex(@_, "goto") }
1663sub pp_dump { loopex(@_, "dump") }
1664
1665sub ftst {
1666 my $self = shift;
9d2c6865 1667 my($op, $cx, $name) = @_;
6e90668e 1668 if (class($op) eq "UNOP") {
9d2c6865
SM
1669 # Genuine `-X' filetests are exempt from the LLAFR, but not
1670 # l?stat(); for the sake of clarity, give'em all parens
1671 return $self->maybe_parens_unop($name, $op->first, $cx);
7934575e 1672 } elsif (class($op) eq "SVOP") {
9d2c6865 1673 return $self->maybe_parens_func($name, $self->pp_gv($op, 1), $cx, 16);
6e90668e 1674 } else { # I don't think baseop filetests ever survive ck_ftst, but...
9d2c6865 1675 return $name;
6e90668e 1676 }
6e90668e
SM
1677}
1678
1679sub pp_lstat { ftst(@_, "lstat") }
1680sub pp_stat { ftst(@_, "stat") }
1681sub pp_ftrread { ftst(@_, "-R") }
1682sub pp_ftrwrite { ftst(@_, "-W") }
1683sub pp_ftrexec { ftst(@_, "-X") }
1684sub pp_fteread { ftst(@_, "-r") }
e31885a0
RH
1685sub pp_ftewrite { ftst(@_, "-w") }
1686sub pp_fteexec { ftst(@_, "-x") }
6e90668e
SM
1687sub pp_ftis { ftst(@_, "-e") }
1688sub pp_fteowned { ftst(@_, "-O") }
1689sub pp_ftrowned { ftst(@_, "-o") }
1690sub pp_ftzero { ftst(@_, "-z") }
1691sub pp_ftsize { ftst(@_, "-s") }
1692sub pp_ftmtime { ftst(@_, "-M") }
1693sub pp_ftatime { ftst(@_, "-A") }
1694sub pp_ftctime { ftst(@_, "-C") }
1695sub pp_ftsock { ftst(@_, "-S") }
1696sub pp_ftchr { ftst(@_, "-c") }
1697sub pp_ftblk { ftst(@_, "-b") }
1698sub pp_ftfile { ftst(@_, "-f") }
1699sub pp_ftdir { ftst(@_, "-d") }
1700sub pp_ftpipe { ftst(@_, "-p") }
1701sub pp_ftlink { ftst(@_, "-l") }
1702sub pp_ftsuid { ftst(@_, "-u") }
1703sub pp_ftsgid { ftst(@_, "-g") }
1704sub pp_ftsvtx { ftst(@_, "-k") }
1705sub pp_fttty { ftst(@_, "-t") }
1706sub pp_fttext { ftst(@_, "-T") }
1707sub pp_ftbinary { ftst(@_, "-B") }
1708
a798dbf2 1709sub SWAP_CHILDREN () { 1 }
6e90668e 1710sub ASSIGN () { 2 } # has OP= variant
7013e6ae 1711sub LIST_CONTEXT () { 4 } # Assignment is in list context
6e90668e 1712
9d2c6865
SM
1713my(%left, %right);
1714
1715sub assoc_class {
1716 my $op = shift;
3f872cb9
GS
1717 my $name = $op->name;
1718 if ($name eq "concat" and $op->first->name eq "concat") {
9d2c6865 1719 # avoid spurious `=' -- see comment in pp_concat
3f872cb9 1720 return "concat";
9d2c6865 1721 }
3f872cb9
GS
1722 if ($name eq "null" and class($op) eq "UNOP"
1723 and $op->first->name =~ /^(and|x?or)$/
9d2c6865
SM
1724 and null $op->first->sibling)
1725 {
1726 # Like all conditional constructs, OP_ANDs and OP_ORs are topped
1727 # with a null that's used as the common end point of the two
1728 # flows of control. For precedence purposes, ignore it.
1729 # (COND_EXPRs have these too, but we don't bother with
1730 # their associativity).
1731 return assoc_class($op->first);
1732 }
1733 return $name . ($op->flags & OPf_STACKED ? "=" : "");
1734}
1735
1736# Left associative operators, like `+', for which
1737# $a + $b + $c is equivalent to ($a + $b) + $c
1738
1739BEGIN {
3f872cb9
GS
1740 %left = ('multiply' => 19, 'i_multiply' => 19,
1741 'divide' => 19, 'i_divide' => 19,
1742 'modulo' => 19, 'i_modulo' => 19,
1743 'repeat' => 19,
1744 'add' => 18, 'i_add' => 18,
1745 'subtract' => 18, 'i_subtract' => 18,
1746 'concat' => 18,
1747 'left_shift' => 17, 'right_shift' => 17,
1748 'bit_and' => 13,
1749 'bit_or' => 12, 'bit_xor' => 12,
1750 'and' => 3,
1751 'or' => 2, 'xor' => 2,
9d2c6865
SM
1752 );
1753}
1754
1755sub deparse_binop_left {
1756 my $self = shift;
1757 my($op, $left, $prec) = @_;
58231d39 1758 if ($left{assoc_class($op)} && $left{assoc_class($left)}
9d2c6865
SM
1759 and $left{assoc_class($op)} == $left{assoc_class($left)})
1760 {
1761 return $self->deparse($left, $prec - .00001);
1762 } else {
1763 return $self->deparse($left, $prec);
1764 }
1765}
1766
1767# Right associative operators, like `=', for which
1768# $a = $b = $c is equivalent to $a = ($b = $c)
1769
1770BEGIN {
3f872cb9
GS
1771 %right = ('pow' => 22,
1772 'sassign=' => 7, 'aassign=' => 7,
1773 'multiply=' => 7, 'i_multiply=' => 7,
1774 'divide=' => 7, 'i_divide=' => 7,
1775 'modulo=' => 7, 'i_modulo=' => 7,
1776 'repeat=' => 7,
1777 'add=' => 7, 'i_add=' => 7,
1778 'subtract=' => 7, 'i_subtract=' => 7,
1779 'concat=' => 7,
1780 'left_shift=' => 7, 'right_shift=' => 7,
1781 'bit_and=' => 7,
1782 'bit_or=' => 7, 'bit_xor=' => 7,
1783 'andassign' => 7,
1784 'orassign' => 7,
9d2c6865
SM
1785 );
1786}
1787
1788sub deparse_binop_right {
1789 my $self = shift;
1790 my($op, $right, $prec) = @_;
58231d39 1791 if ($right{assoc_class($op)} && $right{assoc_class($right)}
9d2c6865
SM
1792 and $right{assoc_class($op)} == $right{assoc_class($right)})
1793 {
1794 return $self->deparse($right, $prec - .00001);
1795 } else {
1796 return $self->deparse($right, $prec);
1797 }
1798}
1799
a798dbf2 1800sub binop {
6e90668e 1801 my $self = shift;
9d2c6865 1802 my ($op, $cx, $opname, $prec, $flags) = (@_, 0);
a798dbf2
MB
1803 my $left = $op->first;
1804 my $right = $op->last;
9d2c6865
SM
1805 my $eq = "";
1806 if ($op->flags & OPf_STACKED && $flags & ASSIGN) {
1807 $eq = "=";
1808 $prec = 7;
1809 }
a798dbf2
MB
1810 if ($flags & SWAP_CHILDREN) {
1811 ($left, $right) = ($right, $left);
1812 }
9d2c6865 1813 $left = $self->deparse_binop_left($op, $left, $prec);
90c0eb26
RH
1814 $left = "($left)" if $flags & LIST_CONTEXT
1815 && $left !~ /^(my|our|local|)[\@\(]/;
9d2c6865
SM
1816 $right = $self->deparse_binop_right($op, $right, $prec);
1817 return $self->maybe_parens("$left $opname$eq $right", $cx, $prec);
1818}
1819
3ed82cfc
GS
1820sub pp_add { maybe_targmy(@_, \&binop, "+", 18, ASSIGN) }
1821sub pp_multiply { maybe_targmy(@_, \&binop, "*", 19, ASSIGN) }
1822sub pp_subtract { maybe_targmy(@_, \&binop, "-",18, ASSIGN) }
1823sub pp_divide { maybe_targmy(@_, \&binop, "/", 19, ASSIGN) }
1824sub pp_modulo { maybe_targmy(@_, \&binop, "%", 19, ASSIGN) }
1825sub pp_i_add { maybe_targmy(@_, \&binop, "+", 18, ASSIGN) }
1826sub pp_i_multiply { maybe_targmy(@_, \&binop, "*", 19, ASSIGN) }
1827sub pp_i_subtract { maybe_targmy(@_, \&binop, "-", 18, ASSIGN) }
1828sub pp_i_divide { maybe_targmy(@_, \&binop, "/", 19, ASSIGN) }
1829sub pp_i_modulo { maybe_targmy(@_, \&binop, "%", 19, ASSIGN) }
1830sub pp_pow { maybe_targmy(@_, \&binop, "**", 22, ASSIGN) }
1831
1832sub pp_left_shift { maybe_targmy(@_, \&binop, "<<", 17, ASSIGN) }
1833sub pp_right_shift { maybe_targmy(@_, \&binop, ">>", 17, ASSIGN) }
1834sub pp_bit_and { maybe_targmy(@_, \&binop, "&", 13, ASSIGN) }
1835sub pp_bit_or { maybe_targmy(@_, \&binop, "|", 12, ASSIGN) }
1836sub pp_bit_xor { maybe_targmy(@_, \&binop, "^", 12, ASSIGN) }
9d2c6865
SM
1837
1838sub pp_eq { binop(@_, "==", 14) }
1839sub pp_ne { binop(@_, "!=", 14) }
1840sub pp_lt { binop(@_, "<", 15) }
1841sub pp_gt { binop(@_, ">", 15) }
1842sub pp_ge { binop(@_, ">=", 15) }
1843sub pp_le { binop(@_, "<=", 15) }
1844sub pp_ncmp { binop(@_, "<=>", 14) }
1845sub pp_i_eq { binop(@_, "==", 14) }
1846sub pp_i_ne { binop(@_, "!=", 14) }
1847sub pp_i_lt { binop(@_, "<", 15) }
1848sub pp_i_gt { binop(@_, ">", 15) }
1849sub pp_i_ge { binop(@_, ">=", 15) }
1850sub pp_i_le { binop(@_, "<=", 15) }
1851sub pp_i_ncmp { binop(@_, "<=>", 14) }
1852
1853sub pp_seq { binop(@_, "eq", 14) }
1854sub pp_sne { binop(@_, "ne", 14) }
1855sub pp_slt { binop(@_, "lt", 15) }
1856sub pp_sgt { binop(@_, "gt", 15) }
1857sub pp_sge { binop(@_, "ge", 15) }
1858sub pp_sle { binop(@_, "le", 15) }
1859sub pp_scmp { binop(@_, "cmp", 14) }
1860
1861sub pp_sassign { binop(@_, "=", 7, SWAP_CHILDREN) }
7013e6ae 1862sub pp_aassign { binop(@_, "=", 7, SWAP_CHILDREN | LIST_CONTEXT) }
6e90668e
SM
1863
1864# `.' is special because concats-of-concats are optimized to save copying
1865# by making all but the first concat stacked. The effect is as if the
1866# programmer had written `($a . $b) .= $c', except legal.
3ed82cfc
GS
1867sub pp_concat { maybe_targmy(@_, \&real_concat) }
1868sub real_concat {
6e90668e 1869 my $self = shift;
9d2c6865 1870 my($op, $cx) = @_;
6e90668e
SM
1871 my $left = $op->first;
1872 my $right = $op->last;
1873 my $eq = "";
9d2c6865 1874 my $prec = 18;
3f872cb9 1875 if ($op->flags & OPf_STACKED and $op->first->name ne "concat") {
6e90668e 1876 $eq = "=";
9d2c6865 1877 $prec = 7;
6e90668e 1878 }
9d2c6865
SM
1879 $left = $self->deparse_binop_left($op, $left, $prec);
1880 $right = $self->deparse_binop_right($op, $right, $prec);
1881 return $self->maybe_parens("$left .$eq $right", $cx, $prec);
6e90668e
SM
1882}
1883
1884# `x' is weird when the left arg is a list
1885sub pp_repeat {
1886 my $self = shift;
9d2c6865 1887 my($op, $cx) = @_;
6e90668e
SM
1888 my $left = $op->first;
1889 my $right = $op->last;
9d2c6865
SM
1890 my $eq = "";
1891 my $prec = 19;
1892 if ($op->flags & OPf_STACKED) {
1893 $eq = "=";
1894 $prec = 7;
1895 }
6e90668e
SM
1896 if (null($right)) { # list repeat; count is inside left-side ex-list
1897 my $kid = $left->first->sibling; # skip pushmark
1898 my @exprs;
1899 for (; !null($kid->sibling); $kid = $kid->sibling) {
9d2c6865 1900 push @exprs, $self->deparse($kid, 6);
6e90668e
SM
1901 }
1902 $right = $kid;
1903 $left = "(" . join(", ", @exprs). ")";
1904 } else {
9d2c6865 1905 $left = $self->deparse_binop_left($op, $left, $prec);
6e90668e 1906 }
9d2c6865
SM
1907 $right = $self->deparse_binop_right($op, $right, $prec);
1908 return $self->maybe_parens("$left x$eq $right", $cx, $prec);
6e90668e
SM
1909}
1910
1911sub range {
1912 my $self = shift;
9d2c6865 1913 my ($op, $cx, $type) = @_;
6e90668e
SM
1914 my $left = $op->first;
1915 my $right = $left->sibling;
9d2c6865
SM
1916 $left = $self->deparse($left, 9);
1917 $right = $self->deparse($right, 9);
1918 return $self->maybe_parens("$left $type $right", $cx, 9);
6e90668e
SM
1919}
1920
1921sub pp_flop {
1922 my $self = shift;
9d2c6865 1923 my($op, $cx) = @_;
6e90668e
SM
1924 my $flip = $op->first;
1925 my $type = ($flip->flags & OPf_SPECIAL) ? "..." : "..";
9d2c6865 1926 return $self->range($flip->first, $cx, $type);
6e90668e
SM
1927}
1928
1929# one-line while/until is handled in pp_leave
1930
1931sub logop {
1932 my $self = shift;
9d2c6865 1933 my ($op, $cx, $lowop, $lowprec, $highop, $highprec, $blockname) = @_;
6e90668e
SM
1934 my $left = $op->first;
1935 my $right = $op->first->sibling;
58cccf98
SM
1936 if ($cx == 0 and is_scope($right) and $blockname
1937 and $self->{'expand'} < 7)
1938 { # if ($a) {$b}
9d2c6865
SM
1939 $left = $self->deparse($left, 1);
1940 $right = $self->deparse($right, 0);
1941 return "$blockname ($left) {\n\t$right\n\b}\cK";
58cccf98
SM
1942 } elsif ($cx == 0 and $blockname and not $self->{'parens'}
1943 and $self->{'expand'} < 7) { # $b if $a
9d2c6865
SM
1944 $right = $self->deparse($right, 1);
1945 $left = $self->deparse($left, 1);
1946 return "$right $blockname $left";
1947 } elsif ($cx > $lowprec and $highop) { # $a && $b
1948 $left = $self->deparse_binop_left($op, $left, $highprec);
1949 $right = $self->deparse_binop_right($op, $right, $highprec);
1950 return $self->maybe_parens("$left $highop $right", $cx, $highprec);
1951 } else { # $a and $b
1952 $left = $self->deparse_binop_left($op, $left, $lowprec);
1953 $right = $self->deparse_binop_right($op, $right, $lowprec);
1954 return $self->maybe_parens("$left $lowop $right", $cx, $lowprec);
1955 }
1956}
1957
1958sub pp_and { logop(@_, "and", 3, "&&", 11, "if") }
f4a44678 1959sub pp_or { logop(@_, "or", 2, "||", 10, "unless") }
c963b151 1960sub pp_dor { logop(@_, "err", 2, "//", 10, "") }
3ed82cfc
GS
1961
1962# xor is syntactically a logop, but it's really a binop (contrary to
1963# old versions of opcode.pl). Syntax is what matters here.
9d2c6865 1964sub pp_xor { logop(@_, "xor", 2, "", 0, "") }
6e90668e
SM
1965
1966sub logassignop {
1967 my $self = shift;
9d2c6865 1968 my ($op, $cx, $opname) = @_;
6e90668e
SM
1969 my $left = $op->first;
1970 my $right = $op->first->sibling->first; # skip sassign
9d2c6865
SM
1971 $left = $self->deparse($left, 7);
1972 $right = $self->deparse($right, 7);
1973 return $self->maybe_parens("$left $opname $right", $cx, 7);
a798dbf2
MB
1974}
1975
6e90668e 1976sub pp_andassign { logassignop(@_, "&&=") }
c963b151
BD
1977sub pp_orassign { logassignop(@_, "||=") }
1978sub pp_dorassign { logassignop(@_, "//=") }
6e90668e
SM
1979
1980sub listop {
1981 my $self = shift;
9d2c6865
SM
1982 my($op, $cx, $name) = @_;
1983 my(@exprs);
1984 my $parens = ($cx >= 5) || $self->{'parens'};
1985 my $kid = $op->first->sibling;
1986 return $name if null $kid;
e31885a0 1987 my $first;
fb725297 1988 $name = "socketpair" if $name eq "sockpair";
e31885a0
RH
1989 if (defined prototype("CORE::$name")
1990 && prototype("CORE::$name") =~ /^;?\*/
1991 && $kid->name eq "rv2gv") {
1992 $first = $self->deparse($kid->first, 6);
1993 }
1994 else {
1995 $first = $self->deparse($kid, 6);
1996 }
e99ebc55 1997 if ($name eq "chmod" && $first =~ /^\d+$/) {
a0035eb8 1998 $first = sprintf("%#o", $first);
e99ebc55 1999 }
9d2c6865
SM
2000 $first = "+$first" if not $parens and substr($first, 0, 1) eq "(";
2001 push @exprs, $first;
2002 $kid = $kid->sibling;
2003 for (; !null($kid); $kid = $kid->sibling) {
2004 push @exprs, $self->deparse($kid, 6);
2005 }
2006 if ($parens) {
2007 return "$name(" . join(", ", @exprs) . ")";
2008 } else {
2009 return "$name " . join(", ", @exprs);
6e90668e 2010 }
6e90668e 2011}
a798dbf2 2012
6e90668e 2013sub pp_bless { listop(@_, "bless") }
3ed82cfc 2014sub pp_atan2 { maybe_targmy(@_, \&listop, "atan2") }
6e90668e
SM
2015sub pp_substr { maybe_local(@_, listop(@_, "substr")) }
2016sub pp_vec { maybe_local(@_, listop(@_, "vec")) }
3ed82cfc
GS
2017sub pp_index { maybe_targmy(@_, \&listop, "index") }
2018sub pp_rindex { maybe_targmy(@_, \&listop, "rindex") }
2019sub pp_sprintf { maybe_targmy(@_, \&listop, "sprintf") }
6e90668e 2020sub pp_formline { listop(@_, "formline") } # see also deparse_format
3ed82cfc 2021sub pp_crypt { maybe_targmy(@_, \&listop, "crypt") }
6e90668e
SM
2022sub pp_unpack { listop(@_, "unpack") }
2023sub pp_pack { listop(@_, "pack") }
3ed82cfc 2024sub pp_join { maybe_targmy(@_, \&listop, "join") }
6e90668e 2025sub pp_splice { listop(@_, "splice") }
3ed82cfc
GS
2026sub pp_push { maybe_targmy(@_, \&listop, "push") }
2027sub pp_unshift { maybe_targmy(@_, \&listop, "unshift") }
6e90668e
SM
2028sub pp_reverse { listop(@_, "reverse") }
2029sub pp_warn { listop(@_, "warn") }
2030sub pp_die { listop(@_, "die") }
9d2c6865
SM
2031# Actually, return is exempt from the LLAFR (see examples in this very
2032# module!), but for consistency's sake, ignore that fact
6e90668e
SM
2033sub pp_return { listop(@_, "return") }
2034sub pp_open { listop(@_, "open") }
2035sub pp_pipe_op { listop(@_, "pipe") }
2036sub pp_tie { listop(@_, "tie") }
82bafd27 2037sub pp_binmode { listop(@_, "binmode") }
6e90668e
SM
2038sub pp_dbmopen { listop(@_, "dbmopen") }
2039sub pp_sselect { listop(@_, "select") }
2040sub pp_select { listop(@_, "select") }
2041sub pp_read { listop(@_, "read") }
2042sub pp_sysopen { listop(@_, "sysopen") }
2043sub pp_sysseek { listop(@_, "sysseek") }
2044sub pp_sysread { listop(@_, "sysread") }
2045sub pp_syswrite { listop(@_, "syswrite") }
2046sub pp_send { listop(@_, "send") }
2047sub pp_recv { listop(@_, "recv") }
2048sub pp_seek { listop(@_, "seek") }
6e90668e
SM
2049sub pp_fcntl { listop(@_, "fcntl") }
2050sub pp_ioctl { listop(@_, "ioctl") }
3ed82cfc 2051sub pp_flock { maybe_targmy(@_, \&listop, "flock") }
6e90668e
SM
2052sub pp_socket { listop(@_, "socket") }
2053sub pp_sockpair { listop(@_, "sockpair") }
2054sub pp_bind { listop(@_, "bind") }
2055sub pp_connect { listop(@_, "connect") }
2056sub pp_listen { listop(@_, "listen") }
2057sub pp_accept { listop(@_, "accept") }
2058sub pp_shutdown { listop(@_, "shutdown") }
2059sub pp_gsockopt { listop(@_, "getsockopt") }
2060sub pp_ssockopt { listop(@_, "setsockopt") }
3ed82cfc
GS
2061sub pp_chown { maybe_targmy(@_, \&listop, "chown") }
2062sub pp_unlink { maybe_targmy(@_, \&listop, "unlink") }
2063sub pp_chmod { maybe_targmy(@_, \&listop, "chmod") }
2064sub pp_utime { maybe_targmy(@_, \&listop, "utime") }
2065sub pp_rename { maybe_targmy(@_, \&listop, "rename") }
2066sub pp_link { maybe_targmy(@_, \&listop, "link") }
2067sub pp_symlink { maybe_targmy(@_, \&listop, "symlink") }
2068sub pp_mkdir { maybe_targmy(@_, \&listop, "mkdir") }
6e90668e
SM
2069sub pp_open_dir { listop(@_, "opendir") }
2070sub pp_seekdir { listop(@_, "seekdir") }
3ed82cfc
GS
2071sub pp_waitpid { maybe_targmy(@_, \&listop, "waitpid") }
2072sub pp_system { maybe_targmy(@_, \&listop, "system") }
2073sub pp_exec { maybe_targmy(@_, \&listop, "exec") }
2074sub pp_kill { maybe_targmy(@_, \&listop, "kill") }
2075sub pp_setpgrp { maybe_targmy(@_, \&listop, "setpgrp") }
2076sub pp_getpriority { maybe_targmy(@_, \&listop, "getpriority") }
2077sub pp_setpriority { maybe_targmy(@_, \&listop, "setpriority") }
6e90668e
SM
2078sub pp_shmget { listop(@_, "shmget") }
2079sub pp_shmctl { listop(@_, "shmctl") }
2080sub pp_shmread { listop(@_, "shmread") }
2081sub pp_shmwrite { listop(@_, "shmwrite") }
2082sub pp_msgget { listop(@_, "msgget") }
2083sub pp_msgctl { listop(@_, "msgctl") }
2084sub pp_msgsnd { listop(@_, "msgsnd") }
2085sub pp_msgrcv { listop(@_, "msgrcv") }
2086sub pp_semget { listop(@_, "semget") }
2087sub pp_semctl { listop(@_, "semctl") }
2088sub pp_semop { listop(@_, "semop") }
2089sub pp_ghbyaddr { listop(@_, "gethostbyaddr") }
2090sub pp_gnbyaddr { listop(@_, "getnetbyaddr") }
2091sub pp_gpbynumber { listop(@_, "getprotobynumber") }
2092sub pp_gsbyname { listop(@_, "getservbyname") }
2093sub pp_gsbyport { listop(@_, "getservbyport") }
2094sub pp_syscall { listop(@_, "syscall") }
2095
2096sub pp_glob {
2097 my $self = shift;
9d2c6865 2098 my($op, $cx) = @_;
6e90668e
SM
2099 my $text = $self->dq($op->first->sibling); # skip pushmark
2100 if ($text =~ /^\$?(\w|::|\`)+$/ # could look like a readline
2101 or $text =~ /[<>]/) {
2102 return 'glob(' . single_delim('qq', '"', $text) . ')';
2103 } else {
2104 return '<' . $text . '>';
2105 }
2106}
2107
f5aa8f4e
SM
2108# Truncate is special because OPf_SPECIAL makes a bareword first arg
2109# be a filehandle. This could probably be better fixed in the core
2110# by moving the GV lookup into ck_truc.
2111
2112sub pp_truncate {
2113 my $self = shift;
2114 my($op, $cx) = @_;
2115 my(@exprs);
2116 my $parens = ($cx >= 5) || $self->{'parens'};
2117 my $kid = $op->first->sibling;
acba1d67 2118 my $fh;
f5aa8f4e
SM
2119 if ($op->flags & OPf_SPECIAL) {
2120 # $kid is an OP_CONST
18228111 2121 $fh = $self->const_sv($kid)->PV;
f5aa8f4e
SM
2122 } else {
2123 $fh = $self->deparse($kid, 6);
2124 $fh = "+$fh" if not $parens and substr($fh, 0, 1) eq "(";
2125 }
2126 my $len = $self->deparse($kid->sibling, 6);
2127 if ($parens) {
2128 return "truncate($fh, $len)";
2129 } else {
2130 return "truncate $fh, $len";
2131 }
f5aa8f4e
SM
2132}
2133
6e90668e
SM
2134sub indirop {
2135 my $self = shift;
9d2c6865 2136 my($op, $cx, $name) = @_;
6e90668e
SM
2137 my($expr, @exprs);
2138 my $kid = $op->first->sibling;
2139 my $indir = "";
2140 if ($op->flags & OPf_STACKED) {
2141 $indir = $kid;
2142 $indir = $indir->first; # skip rv2gv
2143 if (is_scope($indir)) {
9d2c6865 2144 $indir = "{" . $self->deparse($indir, 0) . "}";
c73811ab
RH
2145 } elsif ($indir->name eq "const" && $indir->private & OPpCONST_BARE) {
2146 $indir = $self->const_sv($indir)->PV;
6e90668e 2147 } else {
9d2c6865 2148 $indir = $self->deparse($indir, 24);
6e90668e
SM
2149 }
2150 $indir = $indir . " ";
2151 $kid = $kid->sibling;
2152 }
7e80da18
RH
2153 if ($name eq "sort" && $op->private & (OPpSORT_NUMERIC | OPpSORT_INTEGER)) {
2154 $indir = ($op->private & OPpSORT_REVERSE) ? '{$b <=> $a} '
2155 : '{$a <=> $b} ';
2156 }
2157 elsif ($name eq "sort" && $op->private & OPpSORT_REVERSE) {
2158 $indir = '{$b cmp $a} ';
2159 }
6e90668e 2160 for (; !null($kid); $kid = $kid->sibling) {
9d2c6865 2161 $expr = $self->deparse($kid, 6);
6e90668e
SM
2162 push @exprs, $expr;
2163 }
3ed82cfc 2164 return $self->maybe_parens_func($name, $indir . join(", ", @exprs),
9d2c6865 2165 $cx, 5);
6e90668e
SM
2166}
2167
2168sub pp_prtf { indirop(@_, "printf") }
2169sub pp_print { indirop(@_, "print") }
2170sub pp_sort { indirop(@_, "sort") }
2171
2172sub mapop {
2173 my $self = shift;
9d2c6865 2174 my($op, $cx, $name) = @_;
6e90668e
SM
2175 my($expr, @exprs);
2176 my $kid = $op->first; # this is the (map|grep)start
2177 $kid = $kid->first->sibling; # skip a pushmark
2178 my $code = $kid->first; # skip a null
2179 if (is_scope $code) {
f4a44678 2180 $code = "{" . $self->deparse($code, 0) . "} ";
6e90668e 2181 } else {
9d2c6865 2182 $code = $self->deparse($code, 24) . ", ";
6e90668e
SM
2183 }
2184 $kid = $kid->sibling;
2185 for (; !null($kid); $kid = $kid->sibling) {
9d2c6865 2186 $expr = $self->deparse($kid, 6);
9a58b761 2187 push @exprs, $expr if defined $expr;
6e90668e 2188 }
9d2c6865 2189 return $self->maybe_parens_func($name, $code . join(", ", @exprs), $cx, 5);
6e90668e
SM
2190}
2191
2192sub pp_mapwhile { mapop(@_, "map") }
2193sub pp_grepwhile { mapop(@_, "grep") }
2194
2195sub pp_list {
2196 my $self = shift;
9d2c6865 2197 my($op, $cx) = @_;
6e90668e
SM
2198 my($expr, @exprs);
2199 my $kid = $op->first->sibling; # skip pushmark
2200 my $lop;
ce4e655d 2201 my $local = "either"; # could be local(...), my(...) or our(...)
6e90668e
SM
2202 for ($lop = $kid; !null($lop); $lop = $lop->sibling) {
2203 # This assumes that no other private flags equal 128, and that
2204 # OPs that store things other than flags in their op_private,
2205 # like OP_AELEMFAST, won't be immediate children of a list.
b8e103fc
RH
2206 #
2207 # OP_ENTERSUB can break this logic, so check for it.
2208 # I suspect that open and exit can too.
2209
2210 if (!($lop->private & (OPpLVAL_INTRO|OPpOUR_INTRO)
ce4e655d 2211 or $lop->name eq "undef")
b8e103fc
RH
2212 or $lop->name eq "entersub"
2213 or $lop->name eq "exit"
2214 or $lop->name eq "open")
6e90668e
SM
2215 {
2216 $local = ""; # or not
2217 last;
2218 }
3f872cb9 2219 if ($lop->name =~ /^pad[ash]v$/) { # my()
ce4e655d 2220 ($local = "", last) if $local eq "local" || $local eq "our";
6e90668e 2221 $local = "my";
b8e103fc
RH
2222 } elsif ($lop->name =~ /^(gv|rv2)[ash]v$/
2223 && $lop->private & OPpOUR_INTRO
2224 or $lop->name eq "null" && $lop->first->name eq "gvsv"
2225 && $lop->first->private & OPpOUR_INTRO) { # our()
ce4e655d
RH
2226 ($local = "", last) if $local eq "my" || $local eq "local";
2227 $local = "our";
3f872cb9 2228 } elsif ($lop->name ne "undef") { # local()
ce4e655d 2229 ($local = "", last) if $local eq "my" || $local eq "our";
6e90668e
SM
2230 $local = "local";
2231 }
2232 }
2233 $local = "" if $local eq "either"; # no point if it's all undefs
f5aa8f4e 2234 return $self->deparse($kid, $cx) if null $kid->sibling and not $local;
6e90668e
SM
2235 for (; !null($kid); $kid = $kid->sibling) {
2236 if ($local) {
3f872cb9 2237 if (class($kid) eq "UNOP" and $kid->first->name eq "gvsv") {
6e90668e
SM
2238 $lop = $kid->first;
2239 } else {
2240 $lop = $kid;
2241 }
2242 $self->{'avoid_local'}{$$lop}++;
9d2c6865 2243 $expr = $self->deparse($kid, 6);
6e90668e
SM
2244 delete $self->{'avoid_local'}{$$lop};
2245 } else {
9d2c6865 2246 $expr = $self->deparse($kid, 6);
6e90668e
SM
2247 }
2248 push @exprs, $expr;
2249 }
9d2c6865
SM
2250 if ($local) {
2251 return "$local(" . join(", ", @exprs) . ")";
2252 } else {
2253 return $self->maybe_parens( join(", ", @exprs), $cx, 6);
2254 }
6e90668e
SM
2255}
2256
6f611a1a
GS
2257sub is_ifelse_cont {
2258 my $op = shift;
2259 return ($op->name eq "null" and class($op) eq "UNOP"
2260 and $op->first->name =~ /^(and|cond_expr)$/
2261 and is_scope($op->first->first->sibling));
2262}
2263
6e90668e
SM
2264sub pp_cond_expr {
2265 my $self = shift;
9d2c6865 2266 my($op, $cx) = @_;
6e90668e
SM
2267 my $cond = $op->first;
2268 my $true = $cond->sibling;
2269 my $false = $true->sibling;
9d2c6865 2270 my $cuddle = $self->{'cuddle'};
6f611a1a 2271 unless ($cx == 0 and (is_scope($true) and $true->name ne "null") and
58cccf98
SM
2272 (is_scope($false) || is_ifelse_cont($false))
2273 and $self->{'expand'} < 7) {
f5aa8f4e 2274 $cond = $self->deparse($cond, 8);
9d2c6865
SM
2275 $true = $self->deparse($true, 8);
2276 $false = $self->deparse($false, 8);
2277 return $self->maybe_parens("$cond ? $true : $false", $cx, 8);
6f611a1a
GS
2278 }
2279
f5aa8f4e 2280 $cond = $self->deparse($cond, 1);
9d2c6865 2281 $true = $self->deparse($true, 0);
6f611a1a
GS
2282 my $head = "if ($cond) {\n\t$true\n\b}";
2283 my @elsifs;
2284 while (!null($false) and is_ifelse_cont($false)) {
2285 my $newop = $false->first;
2286 my $newcond = $newop->first;
2287 my $newtrue = $newcond->sibling;
2288 $false = $newtrue->sibling; # last in chain is OP_AND => no else
2289 $newcond = $self->deparse($newcond, 1);
2290 $newtrue = $self->deparse($newtrue, 0);
2291 push @elsifs, "elsif ($newcond) {\n\t$newtrue\n\b}";
2292 }
2293 if (!null($false)) {
2294 $false = $cuddle . "else {\n\t" .
2295 $self->deparse($false, 0) . "\n\b}\cK";
2296 } else {
2297 $false = "\cK";
6e90668e 2298 }
6f611a1a 2299 return $head . join($cuddle, "", @elsifs) . $false;
6e90668e
SM
2300}
2301
58cccf98 2302sub loop_common {
6e90668e 2303 my $self = shift;
58cccf98 2304 my($op, $cx, $init) = @_;
6e90668e
SM
2305 my $enter = $op->first;
2306 my $kid = $enter->sibling;
a0405c92
RH
2307 local(@$self{qw'curstash warnings hints'})
2308 = @$self{qw'curstash warnings hints'};
6e90668e 2309 my $head = "";
9d2c6865 2310 my $bare = 0;
58cccf98
SM
2311 my $body;
2312 my $cond = undef;
3f872cb9 2313 if ($kid->name eq "lineseq") { # bare or infinite loop
6e90668e 2314 if (is_state $kid->last) { # infinite
e99ebc55 2315 $head = "while (1) "; # Can't use for(;;) if there's a continue
58cccf98 2316 $cond = "";
9d2c6865
SM
2317 } else {
2318 $bare = 1;
6e90668e 2319 }
58cccf98 2320 $body = $kid;
3f872cb9 2321 } elsif ($enter->name eq "enteriter") { # foreach
6e90668e
SM
2322 my $ary = $enter->first->sibling; # first was pushmark
2323 my $var = $ary->sibling;
f5aa8f4e
SM
2324 if ($enter->flags & OPf_STACKED
2325 and not null $ary->first->sibling->sibling)
2326 {
d7f5b6da
SM
2327 $ary = $self->deparse($ary->first->sibling, 9) . " .. " .
2328 $self->deparse($ary->first->sibling->sibling, 9);
d8d95777
GA
2329 } else {
2330 $ary = $self->deparse($ary, 1);
2331 }
6e90668e 2332 if (null $var) {
f6f9bdb7 2333 if ($enter->flags & OPf_SPECIAL) { # thread special var
9d2c6865 2334 $var = $self->pp_threadsv($enter, 1);
f6f9bdb7 2335 } else { # regular my() variable
9d2c6865 2336 $var = $self->pp_padsv($enter, 1);
f6f9bdb7
SM
2337 if ($self->padname_sv($enter->targ)->IVX ==
2338 $kid->first->first->sibling->last->cop_seq)
2339 {
2340 # If the scope of this variable closes at the last
2341 # statement of the loop, it must have been
2342 # declared here.
2343 $var = "my " . $var;
2344 }
6e90668e 2345 }
3f872cb9 2346 } elsif ($var->name eq "rv2gv") {
9d2c6865 2347 $var = $self->pp_rv2sv($var, 1);
3f872cb9 2348 } elsif ($var->name eq "gv") {
9d2c6865 2349 $var = "\$" . $self->deparse($var, 1);
6e90668e 2350 }
9d2c6865 2351 $head = "foreach $var ($ary) ";
58cccf98 2352 $body = $kid->first->first->sibling; # skip OP_AND and OP_ITER
3f872cb9 2353 } elsif ($kid->name eq "null") { # while/until
6e90668e 2354 $kid = $kid->first;
58cccf98
SM
2355 my $name = {"and" => "while", "or" => "until"}->{$kid->name};
2356 $cond = $self->deparse($kid->first, 1);
2357 $head = "$name ($cond) ";
2358 $body = $kid->first->sibling;
3f872cb9 2359 } elsif ($kid->name eq "stub") { # bare and empty
9d2c6865 2360 return "{;}"; # {} could be a hashref
6e90668e 2361 }
58cccf98
SM
2362 # If there isn't a continue block, then the next pointer for the loop
2363 # will point to the unstack, which is kid's penultimate child, except
2364 # in a bare loop, when it will point to the leaveloop. When neither of
2365 # these conditions hold, then the third-to-last child in the continue
2366 # block (or the last in a bare loop).
2367 my $cont_start = $enter->nextop;
2368 my $cont;
c73811ab 2369 if ($$cont_start != $$op && ${$cont_start->sibling} != ${$body->last}) {
58cccf98
SM
2370 if ($bare) {
2371 $cont = $body->last;
2372 } else {
2373 $cont = $body->first;
2374 while (!null($cont->sibling->sibling->sibling)) {
2375 $cont = $cont->sibling;
2376 }
2377 }
2378 my $state = $body->first;
2379 my $cuddle = $self->{'cuddle'};
2380 my @states;
2381 for (; $$state != $$cont; $state = $state->sibling) {
2382 push @states, $state;
2383 }
ce4e655d 2384 $body = $self->lineseq(undef, @states);
58cccf98
SM
2385 if (defined $cond and not is_scope $cont and $self->{'expand'} < 3) {
2386 $head = "for ($init; $cond; " . $self->deparse($cont, 1) .") ";
2387 $cont = "\cK";
2388 } else {
2389 $cont = $cuddle . "continue {\n\t" .
2390 $self->deparse($cont, 0) . "\n\b}\cK";
6e90668e 2391 }
6e90668e 2392 } else {
7a9b44b9 2393 return "" if !defined $body;
c73811ab
RH
2394 if (length $init) {
2395 $head = "for ($init; $cond;) ";
2396 }
9d2c6865 2397 $cont = "\cK";
58cccf98 2398 $body = $self->deparse($body, 0);
6e90668e 2399 }
ce4e655d 2400 $body =~ s/;?$/;\n/;
34a48b4b
RH
2401
2402 return $head . "{\n\t" . $body . "\b}" . $cont;
58cccf98
SM
2403}
2404
2405sub pp_leaveloop { loop_common(@_, "") }
2406
2407sub for_loop {
2408 my $self = shift;
2409 my($op, $cx) = @_;
2410 my $init = $self->deparse($op, 1);
c73811ab 2411 return $self->loop_common($op->sibling->first->sibling, $cx, $init);
6e90668e
SM
2412}
2413
2414sub pp_leavetry {
2415 my $self = shift;
9d2c6865 2416 return "eval {\n\t" . $self->pp_leave(@_) . "\n\b}";
bd0865ec 2417}
6e90668e 2418
bd0865ec
GS
2419BEGIN { eval "sub OP_CONST () {" . opnumber("const") . "}" }
2420BEGIN { eval "sub OP_STRINGIFY () {" . opnumber("stringify") . "}" }
a9760014 2421BEGIN { eval "sub OP_RV2SV () {" . opnumber("rv2sv") . "}" }
90c0eb26 2422BEGIN { eval "sub OP_LIST () {" . opnumber("list") . "}" }
f5aa8f4e 2423
a798dbf2 2424sub pp_null {
6e90668e 2425 my $self = shift;
4ae52e81 2426 my($op, $cx, $flags) = @_;
6e90668e 2427 if (class($op) eq "OP") {
f4a44678
SM
2428 # old value is lost
2429 return $self->{'ex_const'} if $op->targ == OP_CONST;
3f872cb9 2430 } elsif ($op->first->name eq "pushmark") {
9d2c6865 2431 return $self->pp_list($op, $cx);
3f872cb9 2432 } elsif ($op->first->name eq "enter") {
9d2c6865 2433 return $self->pp_leave($op, $cx);
bd0865ec 2434 } elsif ($op->targ == OP_STRINGIFY) {
6f611a1a 2435 return $self->dquote($op, $cx);
6e90668e 2436 } elsif (!null($op->first->sibling) and
3f872cb9 2437 $op->first->sibling->name eq "readline" and
6e90668e 2438 $op->first->sibling->flags & OPf_STACKED) {
9d2c6865
SM
2439 return $self->maybe_parens($self->deparse($op->first, 7) . " = "
2440 . $self->deparse($op->first->sibling, 7),
2441 $cx, 7);
6e90668e 2442 } elsif (!null($op->first->sibling) and
3f872cb9 2443 $op->first->sibling->name eq "trans" and
6e90668e 2444 $op->first->sibling->flags & OPf_STACKED) {
9d2c6865
SM
2445 return $self->maybe_parens($self->deparse($op->first, 20) . " =~ "
2446 . $self->deparse($op->first->sibling, 20),
2447 $cx, 20);
c102638c 2448 } elsif ($op->flags & OPf_SPECIAL && $cx == 0 && !$op->targ) {
4ae52e81
RGS
2449 if ($flags) {
2450 return $self->deparse($op->first, $cx);
2451 }
2452 else {
2453 return "do {\n\t". $self->deparse($op->first, $cx) ."\n\b};";
2454 }
ad8caead
RGS
2455 } elsif (!null($op->first->sibling) and
2456 $op->first->sibling->name eq "null" and
2457 class($op->first->sibling) eq "UNOP" and
2458 $op->first->sibling->first->flags & OPf_STACKED and
2459 $op->first->sibling->first->name eq "rcatline") {
2460 return $self->maybe_parens($self->deparse($op->first, 18) . " .= "
2461 . $self->deparse($op->first->sibling, 18),
2462 $cx, 18);
6e90668e 2463 } else {
9d2c6865 2464 return $self->deparse($op->first, $cx);
6e90668e 2465 }
a798dbf2
MB
2466}
2467
6e90668e
SM
2468sub padname {
2469 my $self = shift;
2470 my $targ = shift;
68223ea3 2471 return $self->padname_sv($targ)->PVX;
6e90668e
SM
2472}
2473
2474sub padany {
2475 my $self = shift;
2476 my $op = shift;
2477 return substr($self->padname($op->targ), 1); # skip $/@/%
2478}
2479
2480sub pp_padsv {
2481 my $self = shift;
9d2c6865
SM
2482 my($op, $cx) = @_;
2483 return $self->maybe_my($op, $cx, $self->padname($op->targ));
6e90668e
SM
2484}
2485
2486sub pp_padav { pp_padsv(@_) }
2487sub pp_padhv { pp_padsv(@_) }
2488
9d2c6865
SM
2489my @threadsv_names;
2490
2491BEGIN {
2492 @threadsv_names = ("_", "1", "2", "3", "4", "5", "6", "7", "8", "9",
2493 "&", "`", "'", "+", "/", ".", ",", "\\", '"', ";",
2494 "^", "-", "%", "=", "|", "~", ":", "^A", "^E",
2495 "!", "@");
2496}
f6f9bdb7
SM
2497
2498sub pp_threadsv {
2499 my $self = shift;
9d2c6865
SM
2500 my($op, $cx) = @_;
2501 return $self->maybe_local($op, $cx, "\$" . $threadsv_names[$op->targ]);
f6f9bdb7
SM
2502}
2503
6f611a1a 2504sub gv_or_padgv {
18228111
GS
2505 my $self = shift;
2506 my $op = shift;
6f611a1a
GS
2507 if (class($op) eq "PADOP") {
2508 return $self->padval($op->padix);
2509 } else { # class($op) eq "SVOP"
2510 return $op->gv;
18228111 2511 }
18228111
GS
2512}
2513
6e90668e
SM
2514sub pp_gvsv {
2515 my $self = shift;
9d2c6865 2516 my($op, $cx) = @_;
6f611a1a 2517 my $gv = $self->gv_or_padgv($op);
8510e997
RH
2518 return $self->maybe_local($op, $cx, $self->stash_variable("\$",
2519 $self->gv_name($gv)));
6e90668e
SM
2520}
2521
2522sub pp_gv {
2523 my $self = shift;
9d2c6865 2524 my($op, $cx) = @_;
6f611a1a 2525 my $gv = $self->gv_or_padgv($op);
18228111 2526 return $self->gv_name($gv);
6e90668e
SM
2527}
2528
2529sub pp_aelemfast {
2530 my $self = shift;
9d2c6865 2531 my($op, $cx) = @_;
6f611a1a 2532 my $gv = $self->gv_or_padgv($op);
ce4e655d
RH
2533 my $name = $self->gv_name($gv);
2534 $name = $self->{'curstash'}."::$name"
2535 if $name !~ /::/ && $self->lex_in_scope('@'.$name);
2536
2537 return "\$" . $name . "[" .
7a9b44b9 2538 ($op->private + $self->{'arybase'}) . "]";
6e90668e
SM
2539}
2540
2541sub rv2x {
2542 my $self = shift;
9d2c6865 2543 my($op, $cx, $type) = @_;
90c0eb26
RH
2544
2545 if (class($op) eq 'NULL' || !$op->can("first")) {
ff97752d 2546 carp("Unexpected op in pp_rv2x");
90c0eb26
RH
2547 return 'XXX';
2548 }
6e90668e 2549 my $kid = $op->first;
f5aa8f4e 2550 my $str = $self->deparse($kid, 0);
8510e997
RH
2551 return $self->stash_variable($type, $str) if is_scalar($kid);
2552 return $type ."{$str}";
6e90668e
SM
2553}
2554
2555sub pp_rv2sv { maybe_local(@_, rv2x(@_, "\$")) }
2556sub pp_rv2hv { maybe_local(@_, rv2x(@_, "%")) }
2557sub pp_rv2gv { maybe_local(@_, rv2x(@_, "*")) }
2558
2559# skip rv2av
2560sub pp_av2arylen {
2561 my $self = shift;
9d2c6865 2562 my($op, $cx) = @_;
3f872cb9 2563 if ($op->first->name eq "padav") {
9d2c6865 2564 return $self->maybe_local($op, $cx, '$#' . $self->padany($op->first));
6e90668e 2565 } else {
f5aa8f4e
SM
2566 return $self->maybe_local($op, $cx,
2567 $self->rv2x($op->first, $cx, '$#'));
6e90668e
SM
2568 }
2569}
2570
2571# skip down to the old, ex-rv2cv
90c0eb26
RH
2572sub pp_rv2cv {
2573 my ($self, $op, $cx) = @_;
2574 if (!null($op->first) && $op->first->name eq 'null' &&
2575 $op->first->targ eq OP_LIST)
2576 {
2577 return $self->rv2x($op->first->first->sibling, $cx, "&")
2578 }
2579 else {
2580 return $self->rv2x($op, $cx, "")
2581 }
2582}
6e90668e
SM
2583
2584sub pp_rv2av {
2585 my $self = shift;
9d2c6865 2586 my($op, $cx) = @_;
6e90668e 2587 my $kid = $op->first;
3f872cb9 2588 if ($kid->name eq "const") { # constant list
18228111 2589 my $av = $self->const_sv($kid);
6e90668e
SM
2590 return "(" . join(", ", map(const($_), $av->ARRAY)) . ")";
2591 } else {
9d2c6865 2592 return $self->maybe_local($op, $cx, $self->rv2x($op, $cx, "\@"));
6e90668e
SM
2593 }
2594 }
2595
3ed82cfc
GS
2596sub is_subscriptable {
2597 my $op = shift;
2598 if ($op->name =~ /^[ahg]elem/) {
2599 return 1;
2600 } elsif ($op->name eq "entersub") {
2601 my $kid = $op->first;
2602 return 0 unless null $kid->sibling;
2603 $kid = $kid->first;
2604 $kid = $kid->sibling until null $kid->sibling;
2605 return 0 if is_scope($kid);
2606 $kid = $kid->first;
2607 return 0 if $kid->name eq "gv";
2608 return 0 if is_scalar($kid);
2609 return is_subscriptable($kid);
2610 } else {
2611 return 0;
2612 }
2613}
6e90668e
SM
2614
2615sub elem {
2616 my $self = shift;
9d2c6865 2617 my ($op, $cx, $left, $right, $padname) = @_;
6e90668e 2618 my($array, $idx) = ($op->first, $op->first->sibling);
3f872cb9 2619 unless ($array->name eq $padname) { # Maybe this has been fixed
6e90668e
SM
2620 $array = $array->first; # skip rv2av (or ex-rv2av in _53+)
2621 }
3f872cb9 2622 if ($array->name eq $padname) {
6e90668e
SM
2623 $array = $self->padany($array);
2624 } elsif (is_scope($array)) { # ${expr}[0]
9d2c6865 2625 $array = "{" . $self->deparse($array, 0) . "}";
ce4e655d
RH
2626 } elsif ($array->name eq "gv") {
2627 $array = $self->gv_name($self->gv_or_padgv($array));
2628 if ($array !~ /::/) {
2629 my $prefix = ($left eq '[' ? '@' : '%');
2630 $array = $self->{curstash}.'::'.$array
2631 if $self->lex_in_scope($prefix . $array);
2632 }
6e90668e 2633 } elsif (is_scalar $array) { # $x[0], $$x[0], ...
9d2c6865 2634 $array = $self->deparse($array, 24);
6e90668e
SM
2635 } else {
2636 # $x[20][3]{hi} or expr->[20]
3ed82cfc 2637 my $arrow = is_subscriptable($array) ? "" : "->";
9d2c6865
SM
2638 return $self->deparse($array, 24) . $arrow .
2639 $left . $self->deparse($idx, 1) . $right;
6e90668e 2640 }
9d2c6865 2641 $idx = $self->deparse($idx, 1);
7a9b44b9
RH
2642
2643 # Outer parens in an array index will confuse perl
2644 # if we're interpolating in a regular expression, i.e.
2645 # /$x$foo[(-1)]/ is *not* the same as /$x$foo[-1]/
2646 #
2647 # If $self->{parens}, then an initial '(' will
2648 # definitely be paired with a final ')'. If
2649 # !$self->{parens}, the misleading parens won't
2650 # have been added in the first place.
2651 #
2652 # [You might think that we could get "(...)...(...)"
2653 # where the initial and final parens do not match
2654 # each other. But we can't, because the above would
2655 # only happen if there's an infix binop between the
2656 # two pairs of parens, and *that* means that the whole
2657 # expression would be parenthesized as well.]
2658 #
2659 $idx =~ s/^\((.*)\)$/$1/ if $self->{'parens'};
2660
098251bc
RH
2661 # Hash-element braces will autoquote a bareword inside themselves.
2662 # We need to make sure that C<$hash{warn()}> doesn't come out as
2663 # C<$hash{warn}>, which has a quite different meaning. Currently
2664 # B::Deparse will always quote strings, even if the string was a
2665 # bareword in the original (i.e. the OPpCONST_BARE flag is ignored
2666 # for constant strings.) So we can cheat slightly here - if we see
2667 # a bareword, we know that it is supposed to be a function call.
2668 #
2669 $idx =~ s/^([A-Za-z_]\w*)$/$1()/;
2670
6e90668e
SM
2671 return "\$" . $array . $left . $idx . $right;
2672}
2673
3f872cb9
GS
2674sub pp_aelem { maybe_local(@_, elem(@_, "[", "]", "padav")) }
2675sub pp_helem { maybe_local(@_, elem(@_, "{", "}", "padhv")) }
6e90668e
SM
2676
2677sub pp_gelem {
2678 my $self = shift;
9d2c6865 2679 my($op, $cx) = @_;
6e90668e
SM
2680 my($glob, $part) = ($op->first, $op->last);
2681 $glob = $glob->first; # skip rv2gv
3f872cb9 2682 $glob = $glob->first if $glob->name eq "rv2gv"; # this one's a bug
9d2c6865
SM
2683 my $scope = is_scope($glob);
2684 $glob = $self->deparse($glob, 0);
2685 $part = $self->deparse($part, 1);
6e90668e
SM
2686 return "*" . ($scope ? "{$glob}" : $glob) . "{$part}";
2687}
2688
2689sub slice {
2690 my $self = shift;
9d2c6865 2691 my ($op, $cx, $left, $right, $regname, $padname) = @_;
6e90668e
SM
2692 my $last;
2693 my(@elems, $kid, $array, $list);
2694 if (class($op) eq "LISTOP") {
2695 $last = $op->last;
2696 } else { # ex-hslice inside delete()
2697 for ($kid = $op->first; !null $kid->sibling; $kid = $kid->sibling) {}
2698 $last = $kid;
2699 }
2700 $array = $last;
2701 $array = $array->first
3f872cb9 2702 if $array->name eq $regname or $array->name eq "null";
6e90668e 2703 if (is_scope($array)) {
9d2c6865 2704 $array = "{" . $self->deparse($array, 0) . "}";
3f872cb9 2705 } elsif ($array->name eq $padname) {
6e90668e
SM
2706 $array = $self->padany($array);
2707 } else {
9d2c6865 2708 $array = $self->deparse($array, 24);
6e90668e
SM
2709 }
2710 $kid = $op->first->sibling; # skip pushmark
3f872cb9 2711 if ($kid->name eq "list") {
6e90668e
SM
2712 $kid = $kid->first->sibling; # skip list, pushmark
2713 for (; !null $kid; $kid = $kid->sibling) {
9d2c6865 2714 push @elems, $self->deparse($kid, 6);
6e90668e
SM
2715 }
2716 $list = join(", ", @elems);
2717 } else {
9d2c6865 2718 $list = $self->deparse($kid, 1);
6e90668e
SM
2719 }
2720 return "\@" . $array . $left . $list . $right;
2721}
2722
3ed82cfc
GS
2723sub pp_aslice { maybe_local(@_, slice(@_, "[", "]", "rv2av", "padav")) }
2724sub pp_hslice { maybe_local(@_, slice(@_, "{", "}", "rv2hv", "padhv")) }
6e90668e
SM
2725
2726sub pp_lslice {
2727 my $self = shift;
9d2c6865 2728 my($op, $cx) = @_;
6e90668e
SM
2729 my $idx = $op->first;
2730 my $list = $op->last;
2731 my(@elems, $kid);
9d2c6865
SM
2732 $list = $self->deparse($list, 1);
2733 $idx = $self->deparse($idx, 1);
2734 return "($list)" . "[$idx]";
6e90668e
SM
2735}
2736
6e90668e
SM
2737sub want_scalar {
2738 my $op = shift;
2739 return ($op->flags & OPf_WANT) == OPf_WANT_SCALAR;
2740}
2741
bd0865ec
GS
2742sub want_list {
2743 my $op = shift;
2744 return ($op->flags & OPf_WANT) == OPf_WANT_LIST;
2745}
2746
2747sub method {
6e90668e 2748 my $self = shift;
9d2c6865 2749 my($op, $cx) = @_;
bd0865ec
GS
2750 my $kid = $op->first->sibling; # skip pushmark
2751 my($meth, $obj, @exprs);
3f872cb9 2752 if ($kid->name eq "list" and want_list $kid) {
bd0865ec
GS
2753 # When an indirect object isn't a bareword but the args are in
2754 # parens, the parens aren't part of the method syntax (the LLAFR
2755 # doesn't apply), but they make a list with OPf_PARENS set that
2756 # doesn't get flattened by the append_elem that adds the method,
2757 # making a (object, arg1, arg2, ...) list where the object
2758 # usually is. This can be distinguished from
2759 # `($obj, $arg1, $arg2)->meth()' (which is legal if $arg2 is an
2760 # object) because in the later the list is in scalar context
2761 # as the left side of -> always is, while in the former
2762 # the list is in list context as method arguments always are.
2763 # (Good thing there aren't method prototypes!)
3ed82cfc 2764 $meth = $kid->sibling;
bd0865ec
GS
2765 $kid = $kid->first->sibling; # skip pushmark
2766 $obj = $kid;
6e90668e 2767 $kid = $kid->sibling;
bd0865ec 2768 for (; not null $kid; $kid = $kid->sibling) {
9d2c6865 2769 push @exprs, $self->deparse($kid, 6);
6e90668e 2770 }
bd0865ec
GS
2771 } else {
2772 $obj = $kid;
2773 $kid = $kid->sibling;
90c0eb26
RH
2774 for (; !null ($kid->sibling) && $kid->name ne "method_named";
2775 $kid = $kid->sibling) {
bd0865ec 2776 push @exprs, $self->deparse($kid, 6);
6e90668e 2777 }
3ed82cfc 2778 $meth = $kid;
bd0865ec
GS
2779 }
2780 $obj = $self->deparse($obj, 24);
3ed82cfc 2781 if ($meth->name eq "method_named") {
18228111 2782 $meth = $self->const_sv($meth)->PV;
bd0865ec 2783 } else {
3ed82cfc
GS
2784 $meth = $meth->first;
2785 if ($meth->name eq "const") {
2786 # As of 5.005_58, this case is probably obsoleted by the
2787 # method_named case above
18228111 2788 $meth = $self->const_sv($meth)->PV; # needs to be bare
3ed82cfc
GS
2789 } else {
2790 $meth = $self->deparse($meth, 1);
2791 }
bd0865ec
GS
2792 }
2793 my $args = join(", ", @exprs);
2794 $kid = $obj . "->" . $meth;
145eb477 2795 if (length $args) {
bd0865ec
GS
2796 return $kid . "(" . $args . ")"; # parens mandatory
2797 } else {
2798 return $kid;
2799 }
2800}
2801
2802# returns "&" if the prototype doesn't match the args,
2803# or ("", $args_after_prototype_demunging) if it does.
2804sub check_proto {
2805 my $self = shift;
acaaef34 2806 return "&" if $self->{'noproto'};
bd0865ec
GS
2807 my($proto, @args) = @_;
2808 my($arg, $real);
2809 my $doneok = 0;
2810 my @reals;
2811 # An unbackslashed @ or % gobbles up the rest of the args
2ae48fff 2812 1 while $proto =~ s/(?<!\\)([@%])[^\]]+$/$1/;
bd0865ec 2813 while ($proto) {
2ae48fff 2814 $proto =~ s/^(\\?[\$\@&%*]|\\\[[\$\@&%*]+\]|;)//;
bd0865ec
GS
2815 my $chr = $1;
2816 if ($chr eq "") {
2817 return "&" if @args;
2818 } elsif ($chr eq ";") {
2819 $doneok = 1;
2820 } elsif ($chr eq "@" or $chr eq "%") {
2821 push @reals, map($self->deparse($_, 6), @args);
2822 @args = ();
6e90668e 2823 } else {
bd0865ec
GS
2824 $arg = shift @args;
2825 last unless $arg;
2826 if ($chr eq "\$") {
2827 if (want_scalar $arg) {
2828 push @reals, $self->deparse($arg, 6);
2829 } else {
2830 return "&";
2831 }
2832 } elsif ($chr eq "&") {
3f872cb9 2833 if ($arg->name =~ /^(s?refgen|undef)$/) {
bd0865ec
GS
2834 push @reals, $self->deparse($arg, 6);
2835 } else {
2836 return "&";
2837 }
2838 } elsif ($chr eq "*") {
3f872cb9
GS
2839 if ($arg->name =~ /^s?refgen$/
2840 and $arg->first->first->name eq "rv2gv")
bd0865ec
GS
2841 {
2842 $real = $arg->first->first; # skip refgen, null
3f872cb9 2843 if ($real->first->name eq "gv") {
bd0865ec
GS
2844 push @reals, $self->deparse($real, 6);
2845 } else {
2846 push @reals, $self->deparse($real->first, 6);
2847 }
2848 } else {
2849 return "&";
2850 }
2851 } elsif (substr($chr, 0, 1) eq "\\") {
2ae48fff 2852 $chr =~ tr/\\[]//d;
3f872cb9 2853 if ($arg->name =~ /^s?refgen$/ and
bd0865ec 2854 !null($real = $arg->first) and
2ae48fff
RGS
2855 ($chr =~ /\$/ && is_scalar($real->first)
2856 or ($chr =~ /@/
2857 && class($real->first->sibling) ne 'NULL'
3f872cb9
GS
2858 && $real->first->sibling->name
2859 =~ /^(rv2|pad)av$/)
2ae48fff
RGS
2860 or ($chr =~ /%/
2861 && class($real->first->sibling) ne 'NULL'
3f872cb9
GS
2862 && $real->first->sibling->name
2863 =~ /^(rv2|pad)hv$/)
2ae48fff 2864 #or ($chr =~ /&/ # This doesn't work
3f872cb9 2865 # && $real->first->name eq "rv2cv")
2ae48fff 2866 or ($chr =~ /\*/
3f872cb9 2867 && $real->first->name eq "rv2gv")))
bd0865ec
GS
2868 {
2869 push @reals, $self->deparse($real, 6);
2870 } else {
2871 return "&";
2872 }
2873 }
2874 }
9d2c6865 2875 }
bd0865ec
GS
2876 return "&" if $proto and !$doneok; # too few args and no `;'
2877 return "&" if @args; # too many args
2878 return ("", join ", ", @reals);
2879}
2880
2881sub pp_entersub {
2882 my $self = shift;
2883 my($op, $cx) = @_;
2884 return $self->method($op, $cx) unless null $op->first->sibling;
2885 my $prefix = "";
2886 my $amper = "";
2887 my($kid, @exprs);
90c0eb26 2888 if ($op->flags & OPf_SPECIAL && !($op->flags & OPf_MOD)) {
9d2c6865
SM
2889 $prefix = "do ";
2890 } elsif ($op->private & OPpENTERSUB_AMPER) {
2891 $amper = "&";
2892 }
2893 $kid = $op->first;
2894 $kid = $kid->first->sibling; # skip ex-list, pushmark
2895 for (; not null $kid->sibling; $kid = $kid->sibling) {
2896 push @exprs, $kid;
2897 }
bd0865ec
GS
2898 my $simple = 0;
2899 my $proto = undef;
9d2c6865
SM
2900 if (is_scope($kid)) {
2901 $amper = "&";
2902 $kid = "{" . $self->deparse($kid, 0) . "}";
3f872cb9 2903 } elsif ($kid->first->name eq "gv") {
6f611a1a 2904 my $gv = $self->gv_or_padgv($kid->first);
9d2c6865
SM
2905 if (class($gv->CV) ne "SPECIAL") {
2906 $proto = $gv->CV->PV if $gv->CV->FLAGS & SVf_POK;
2907 }
bd0865ec 2908 $simple = 1; # only calls of named functions can be prototyped
9d2c6865 2909 $kid = $self->deparse($kid, 24);
90c0eb26 2910 } elsif (is_scalar ($kid->first) && $kid->first->name ne 'rv2cv') {
9d2c6865
SM
2911 $amper = "&";
2912 $kid = $self->deparse($kid, 24);
2913 } else {
2914 $prefix = "";
3ed82cfc
GS
2915 my $arrow = is_subscriptable($kid->first) ? "" : "->";
2916 $kid = $self->deparse($kid, 24) . $arrow;
9d2c6865 2917 }
0ca62a8e
RH
2918
2919 # Doesn't matter how many prototypes there are, if
2920 # they haven't happened yet!
1d38190f
RGS
2921 my $declared;
2922 {
2923 no strict 'refs';
2924 no warnings 'uninitialized';
2925 $declared = exists $self->{'subs_declared'}{$kid}
2926 || (
2927 defined &{ %{$self->{'curstash'}."::"}->{$kid} }
2928 && !exists
2929 $self->{'subs_deparsed'}{$self->{'curstash'}."::".$kid}
2930 && defined prototype $self->{'curstash'}."::".$kid
2931 );
2932 if (!$declared && defined($proto)) {
2933 # Avoid "too early to check prototype" warning
2934 ($amper, $proto) = ('&');
2935 }
e99ebc55 2936 }
0ca62a8e 2937
bd0865ec 2938 my $args;
0ca62a8e 2939 if ($declared and defined $proto and not $amper) {
bd0865ec
GS
2940 ($amper, $args) = $self->check_proto($proto, @exprs);
2941 if ($amper eq "&") {
9d2c6865
SM
2942 $args = join(", ", map($self->deparse($_, 6), @exprs));
2943 }
2944 } else {
2945 $args = join(", ", map($self->deparse($_, 6), @exprs));
6e90668e 2946 }
9d2c6865
SM
2947 if ($prefix or $amper) {
2948 if ($op->flags & OPf_STACKED) {
2949 return $prefix . $amper . $kid . "(" . $args . ")";
2950 } else {
2951 return $prefix . $amper. $kid;
2952 }
6e90668e 2953 } else {
34a48b4b 2954 # glob() invocations can be translated into calls of
d1be9408 2955 # CORE::GLOBAL::glob with a second parameter, a number.
34a48b4b
RH
2956 # Reverse this.
2957 if ($kid eq "CORE::GLOBAL::glob") {
2958 $kid = "glob";
2959 $args =~ s/\s*,[^,]+$//;
2960 }
2961
2962 # It's a syntax error to call CORE::GLOBAL::foo without a prefix,
2963 # so it must have been translated from a keyword call. Translate
2964 # it back.
2965 $kid =~ s/^CORE::GLOBAL:://;
2966
0ca62a8e
RH
2967 if (!$declared) {
2968 return "$kid(" . $args . ")";
2969 } elsif (defined $proto and $proto eq "") {
9d2c6865 2970 return $kid;
ce4e655d 2971 } elsif (defined $proto and $proto eq "\$" and is_scalar($exprs[0])) {
9d2c6865 2972 return $self->maybe_parens_func($kid, $args, $cx, 16);
6f611a1a 2973 } elsif (defined($proto) && $proto or $simple) {
9d2c6865
SM
2974 return $self->maybe_parens_func($kid, $args, $cx, 5);
2975 } else {
2976 return "$kid(" . $args . ")";
2977 }
6e90668e
SM
2978 }
2979}
2980
2981sub pp_enterwrite { unop(@_, "write") }
2982
2983# escape things that cause interpolation in double quotes,
2984# but not character escapes
2985sub uninterp {
2986 my($str) = @_;
3f766ba3 2987 $str =~ s/(^|\G|[^\\])((?:\\\\)*)([\$\@]|\\[uUlLQE])/$1$2\\$3/g;
9d2c6865
SM
2988 return $str;
2989}
2990
b7dad2dc
RH
2991{
2992my $bal;
2993BEGIN {
cdf8218f
RH
2994 use re "eval";
2995 # Matches any string which is balanced with respect to {braces}
b7dad2dc 2996 $bal = qr(
cdf8218f
RH
2997 (?:
2998 [^\\{}]
2999 | \\\\
3000 | \\[{}]
3001 | \{(??{$bal})\}
3002 )*
3003 )x;
b7dad2dc
RH
3004}
3005
3006# the same, but treat $|, $), $( and $ at the end of the string differently
3007sub re_uninterp {
3008 my($str) = @_;
cdf8218f
RH
3009
3010 $str =~ s/
3011 ( ^|\G # $1
3012 | [^\\]
3013 )
3014
3015 ( # $2
3016 (?:\\\\)*
3017 )
3018
3019 ( # $3
3020 (\(\?\??\{$bal\}\)) # $4
3021 | [\$\@]
3022 (?!\||\)|\(|$)
3023 | \\[uUlLQE]
3024 )
3025
2621462b 3026 /defined($4) && length($4) ? "$1$2$4" : "$1$2\\$3"/xeg;
cdf8218f 3027
6e90668e
SM
3028 return $str;
3029}
3030
b7dad2dc
RH
3031# This is for regular expressions with the /x modifier
3032# We have to leave comments unmangled.
a9760014 3033sub re_uninterp_extended {
b7dad2dc
RH
3034 my($str) = @_;
3035
3036 $str =~ s/
3037 ( ^|\G # $1
3038 | [^\\]
3039 )
3040
3041 ( # $2
3042 (?:\\\\)*
3043 )
3044
3045 ( # $3
3046 ( \(\?\??\{$bal\}\) # $4 (skip over (?{}) and (??{}) blocks)
3047 | \#[^\n]* # (skip over comments)
3048 )
3049 | [\$\@]
9a58b761 3050 (?!\||\)|\(|$|\s)
b7dad2dc
RH
3051 | \\[uUlLQE]
3052 )
3053
c7de4c66 3054 /defined($4) && length($4) ? "$1$2$4" : "$1$2\\$3"/xeg;
b7dad2dc 3055
a9760014
RH
3056 return $str;
3057}
b7dad2dc 3058}
a9760014 3059
57aa3c4e
JH
3060my %unctrl = # portable to to EBCDIC
3061 (
3062 "\c@" => '\c@', # unused
3063 "\cA" => '\cA',
3064 "\cB" => '\cB',
3065 "\cC" => '\cC',
3066 "\cD" => '\cD',
3067 "\cE" => '\cE',
3068 "\cF" => '\cF',
3069 "\cG" => '\cG',
3070 "\cH" => '\cH',
3071 "\cI" => '\cI',
3072 "\cJ" => '\cJ',
3073 "\cK" => '\cK',
3074 "\cL" => '\cL',
3075 "\cM" => '\cM',
3076 "\cN" => '\cN',
3077 "\cO" => '\cO',
3078 "\cP" => '\cP',
3079 "\cQ" => '\cQ',
3080 "\cR" => '\cR',
3081 "\cS" => '\cS',
3082 "\cT" => '\cT',
3083 "\cU" => '\cU',
3084 "\cV" => '\cV',
3085 "\cW" => '\cW',
3086 "\cX" => '\cX',
3087 "\cY" => '\cY',
3088 "\cZ" => '\cZ',
3089 "\c[" => '\c[', # unused
3090 "\c\\" => '\c\\', # unused
3091 "\c]" => '\c]', # unused
3092 "\c_" => '\c_', # unused
3093 );
3094
6e90668e 3095# character escapes, but not delimiters that might need to be escaped
746698c5 3096sub escape_str { # ASCII, UTF8
6e90668e 3097 my($str) = @_;
cef22867 3098 $str =~ s/(.)/ord($1) > 255 ? sprintf("\\x{%x}", ord($1)) : $1/eg;
6e90668e 3099 $str =~ s/\a/\\a/g;
9200a1b0 3100# $str =~ s/\cH/\\b/g; # \b means something different in a regex
6e90668e
SM
3101 $str =~ s/\t/\\t/g;
3102 $str =~ s/\n/\\n/g;
3103 $str =~ s/\e/\\e/g;
3104 $str =~ s/\f/\\f/g;
3105 $str =~ s/\r/\\r/g;
fc132725 3106 $str =~ s/([\cA-\cZ])/$unctrl{$1}/ge;
cef22867 3107 $str =~ s/([[:^print:]])/sprintf("\\%03o", ord($1))/ge;
6e90668e
SM
3108 return $str;
3109}
3110
b7dad2dc
RH
3111# For regexes with the /x modifier.
3112# Leave whitespace unmangled.
a9760014
RH
3113sub escape_extended_re {
3114 my($str) = @_;
cef22867 3115 $str =~ s/(.)/ord($1) > 255 ? sprintf("\\x{%x}", ord($1)) : $1/eg;
aee8fd8d
RGS
3116 $str =~ s/([[:^print:]])/
3117 ($1 =~ y! \t\n!!) ? $1 : sprintf("\\%03o", ord($1))/ge;
a9760014
RH
3118 $str =~ s/\n/\n\f/g;
3119 return $str;
3120}
3121
9d2c6865
SM
3122# Don't do this for regexen
3123sub unback {
3124 my($str) = @_;
3125 $str =~ s/\\/\\\\/g;
3126 return $str;
3127}
3128
08c6f5ec
RH
3129# Remove backslashes which precede literal control characters,
3130# to avoid creating ambiguity when we escape the latter.
3131sub re_unback {
3132 my($str) = @_;
3133
3134 # the insane complexity here is due to the behaviour of "\c\"
cef22867 3135 $str =~ s/(^|[^\\]|\\c\\)(?<!\\c)\\(\\\\)*(?=[[:^print:]])/$1$2/g;
08c6f5ec
RH
3136 return $str;
3137}
3138
6e90668e
SM
3139sub balanced_delim {
3140 my($str) = @_;
3141 my @str = split //, $str;
3142 my($ar, $open, $close, $fail, $c, $cnt);
3143 for $ar (['[',']'], ['(',')'], ['<','>'], ['{','}']) {
3144 ($open, $close) = @$ar;
3145 $fail = 0; $cnt = 0;
3146 for $c (@str) {
3147 if ($c eq $open) {
3148 $cnt++;
3149 } elsif ($c eq $close) {
3150 $cnt--;
3151 if ($cnt < 0) {
bd0865ec 3152 # qq()() isn't ")("
6e90668e
SM
3153 $fail = 1;
3154 last;
3155 }
3156 }
3157 }
3158 $fail = 1 if $cnt != 0;
3159 return ($open, "$open$str$close") if not $fail;
3160 }
3161 return ("", $str);
3162}
3163
3164sub single_delim {
3165 my($q, $default, $str) = @_;
90be192f 3166 return "$default$str$default" if $default and index($str, $default) == -1;
8347ad86
RGS
3167 if ($q ne 'qr') {
3168 (my $succeed, $str) = balanced_delim($str);
3169 return "$q$str" if $succeed;
3170 }
3171 for my $delim ('/', '"', '#') {
6e90668e
SM
3172 return "$q$delim" . $str . $delim if index($str, $delim) == -1;
3173 }
90be192f
SM
3174 if ($default) {
3175 $str =~ s/$default/\\$default/g;
3176 return "$default$str$default";
3177 } else {
3178 $str =~ s[/][\\/]g;
3179 return "$q/$str/";
3180 }
6e90668e
SM
3181}
3182
6e90668e
SM
3183sub const {
3184 my $sv = shift;
3185 if (class($sv) eq "SPECIAL") {
bd0865ec 3186 return ('undef', '1', '0')[$$sv-1]; # sv_undef, sv_yes, sv_no
7a9b44b9
RH
3187 } elsif (class($sv) eq "NULL") {
3188 return 'undef';
6e90668e 3189 } elsif ($sv->FLAGS & SVf_IOK) {
d9963e60 3190 return $sv->int_value;
6e90668e 3191 } elsif ($sv->FLAGS & SVf_NOK) {
fecea806
RH
3192 # try the default stringification
3193 my $r = "".$sv->NV;
3194 if ($r =~ /e/) {
3195 # If it's in scientific notation, we might have lost information
3196 return sprintf("%.20e", $sv->NV);
3197 }
3198 return $r;
7a9b44b9 3199 } elsif ($sv->FLAGS & SVf_ROK && $sv->can("RV")) {
6e90668e 3200 return "\\(" . const($sv->RV) . ")"; # constant folded
34768ba5 3201 } elsif ($sv->FLAGS & SVf_POK) {
6e90668e 3202 my $str = $sv->PV;
bd0865ec 3203 if ($str =~ /[^ -~]/) { # ASCII for non-printing
9d2c6865 3204 return single_delim("qq", '"', uninterp escape_str unback $str);
6e90668e 3205 } else {
bd0865ec 3206 return single_delim("q", "'", unback $str);
6e90668e 3207 }
34768ba5
RH
3208 } else {
3209 return "undef";
a798dbf2
MB
3210 }
3211}
3212
18228111
GS
3213sub const_sv {
3214 my $self = shift;
3215 my $op = shift;
3216 my $sv = $op->sv;
3217 # the constant could be in the pad (under useithreads)
3218 $sv = $self->padval($op->targ) unless $$sv;
3219 return $sv;
3220}
3221
6e90668e
SM
3222sub pp_const {
3223 my $self = shift;
9d2c6865 3224 my($op, $cx) = @_;
7e40138b
RH
3225 if ($op->private & OPpCONST_ARYBASE) {
3226 return '$[';
3227 }
4c1f658f 3228# if ($op->private & OPpCONST_BARE) { # trouble with `=>' autoquoting
18228111 3229# return $self->const_sv($op)->PV;
6e90668e 3230# }
18228111 3231 my $sv = $self->const_sv($op);
d5ae42cc
JM
3232# return const($sv);
3233 my $c = const $sv;
76ef7183 3234 return $c =~ /^-\d/ ? $self->maybe_parens($c, $cx, 21) : $c;
6e90668e
SM
3235}
3236
3237sub dq {
3238 my $self = shift;
3239 my $op = shift;
3f872cb9
GS
3240 my $type = $op->name;
3241 if ($type eq "const") {
f3402b25
RH
3242 return '$[' if $op->private & OPpCONST_ARYBASE;
3243 return uninterp(escape_str(unback($self->const_sv($op)->as_string)));
3f872cb9 3244 } elsif ($type eq "concat") {
8fed1104
RH
3245 my $first = $self->dq($op->first);
3246 my $last = $self->dq($op->last);
44c6d2a1 3247
b7dad2dc 3248 # Disambiguate "${foo}bar", "${foo}{bar}", "${foo}[1]"
44c6d2a1
RH
3249 ($last =~ /^[A-Z\\\^\[\]_?]/ &&
3250 $first =~ s/([\$@])\^$/${1}{^}/) # "${^}W" etc
3251 || ($last =~ /^[{\[\w_]/ &&
3252 $first =~ s/([\$@])([A-Za-z_]\w*)$/${1}{$2}/);
3253
8fed1104 3254 return $first . $last;
3f872cb9 3255 } elsif ($type eq "uc") {
6e90668e 3256 return '\U' . $self->dq($op->first->sibling) . '\E';
3f872cb9 3257 } elsif ($type eq "lc") {
6e90668e 3258 return '\L' . $self->dq($op->first->sibling) . '\E';
3f872cb9 3259 } elsif ($type eq "ucfirst") {
6e90668e 3260 return '\u' . $self->dq($op->first->sibling);
3f872cb9 3261 } elsif ($type eq "lcfirst") {
6e90668e 3262 return '\l' . $self->dq($op->first->sibling);
3f872cb9 3263 } elsif ($type eq "quotemeta") {
6e90668e 3264 return '\Q' . $self->dq($op->first->sibling) . '\E';
3f872cb9 3265 } elsif ($type eq "join") {
9d2c6865 3266 return $self->deparse($op->last, 26); # was join($", @ary)
a798dbf2 3267 } else {
9d2c6865 3268 return $self->deparse($op, 26);
6e90668e
SM
3269 }
3270}
3271
3272sub pp_backtick {
3273 my $self = shift;
9d2c6865 3274 my($op, $cx) = @_;
6e90668e
SM
3275 # skip pushmark
3276 return single_delim("qx", '`', $self->dq($op->first->sibling));
3277}
3278
3279sub dquote {
3280 my $self = shift;
6f611a1a 3281 my($op, $cx) = @_;
3ed82cfc
GS
3282 my $kid = $op->first->sibling; # skip ex-stringify, pushmark
3283 return $self->deparse($kid, $cx) if $self->{'unquote'};
3284 $self->maybe_targmy($kid, $cx,
3285 sub {single_delim("qq", '"', $self->dq($_[1]))});
6e90668e
SM
3286}
3287
bd0865ec 3288# OP_STRINGIFY is a listop, but it only ever has one arg
3ed82cfc 3289sub pp_stringify { maybe_targmy(@_, \&dquote) }
6e90668e
SM
3290
3291# tr/// and s/// (and tr[][], tr[]//, tr###, etc)
3292# note that tr(from)/to/ is OK, but not tr/from/(to)
3293sub double_delim {
3294 my($from, $to) = @_;
3295 my($succeed, $delim);
3296 if ($from !~ m[/] and $to !~ m[/]) {
3297 return "/$from/$to/";
3298 } elsif (($succeed, $from) = balanced_delim($from) and $succeed) {
3299 if (($succeed, $to) = balanced_delim($to) and $succeed) {
3300 return "$from$to";
3301 } else {
3302 for $delim ('/', '"', '#') { # note no `'' -- s''' is special
3303 return "$from$delim$to$delim" if index($to, $delim) == -1;
3304 }
3305 $to =~ s[/][\\/]g;
3306 return "$from/$to/";
3307 }
3308 } else {
3309 for $delim ('/', '"', '#') { # note no '
3310 return "$delim$from$delim$to$delim"
3311 if index($to . $from, $delim) == -1;
3312 }
3313 $from =~ s[/][\\/]g;
3314 $to =~ s[/][\\/]g;
3315 return "/$from/$to/";
3316 }
3317}
3318
2a9e2f8a 3319# Only used by tr///, so backslashes hyphens
6e90668e
SM
3320sub pchr { # ASCII
3321 my($n) = @_;
3322 if ($n == ord '\\') {
3323 return '\\\\';
2a9e2f8a
RH
3324 } elsif ($n == ord "-") {
3325 return "\\-";
6e90668e
SM
3326 } elsif ($n >= ord(' ') and $n <= ord('~')) {
3327 return chr($n);
3328 } elsif ($n == ord "\a") {
3329 return '\\a';
3330 } elsif ($n == ord "\b") {
3331 return '\\b';
3332 } elsif ($n == ord "\t") {
3333 return '\\t';
3334 } elsif ($n == ord "\n") {
3335 return '\\n';
3336 } elsif ($n == ord "\e") {
3337 return '\\e';
3338 } elsif ($n == ord "\f") {
3339 return '\\f';
3340 } elsif ($n == ord "\r") {
3341 return '\\r';
3342 } elsif ($n >= ord("\cA") and $n <= ord("\cZ")) {
3343 return '\\c' . chr(ord("@") + $n);
3344 } else {
3345# return '\x' . sprintf("%02x", $n);
3346 return '\\' . sprintf("%03o", $n);
3347 }
3348}
3349
3350sub collapse {
3351 my(@chars) = @_;
23db111c 3352 my($str, $c, $tr) = ("");
6e90668e
SM
3353 for ($c = 0; $c < @chars; $c++) {
3354 $tr = $chars[$c];
3355 $str .= pchr($tr);
3356 if ($c <= $#chars - 2 and $chars[$c + 1] == $tr + 1 and
3357 $chars[$c + 2] == $tr + 2)
3358 {
f4a44678
SM
3359 for (; $c <= $#chars-1 and $chars[$c + 1] == $chars[$c] + 1; $c++)
3360 {}
6e90668e
SM
3361 $str .= "-";
3362 $str .= pchr($chars[$c]);
3363 }
3364 }
3365 return $str;
3366}
3367
f4a44678
SM
3368sub tr_decode_byte {
3369 my($table, $flags) = @_;
2a9e2f8a 3370 my(@table) = unpack("s*", $table);
bec89253 3371 splice @table, 0x100, 1; # Number of subsequent elements
6e90668e
SM
3372 my($c, $tr, @from, @to, @delfrom, $delhyphen);
3373 if ($table[ord "-"] != -1 and
3374 $table[ord("-") - 1] == -1 || $table[ord("-") + 1] == -1)
3375 {
3376 $tr = $table[ord "-"];
3377 $table[ord "-"] = -1;
3378 if ($tr >= 0) {
3379 @from = ord("-");
3380 @to = $tr;
3381 } else { # -2 ==> delete
3382 $delhyphen = 1;
3383 }
3384 }
2a9e2f8a 3385 for ($c = 0; $c < @table; $c++) {
6e90668e
SM
3386 $tr = $table[$c];
3387 if ($tr >= 0) {
3388 push @from, $c; push @to, $tr;
3389 } elsif ($tr == -2) {
3390 push @delfrom, $c;
3391 }
3392 }
6e90668e 3393 @from = (@from, @delfrom);
f4a44678 3394 if ($flags & OPpTRANS_COMPLEMENT) {
6e90668e
SM
3395 my @newfrom = ();
3396 my %from;
3397 @from{@from} = (1) x @from;
3398 for ($c = 0; $c < 256; $c++) {
3399 push @newfrom, $c unless $from{$c};
3400 }
3401 @from = @newfrom;
3402 }
56d8b52c 3403 unless ($flags & OPpTRANS_DELETE || !@to) {
6e90668e
SM
3404 pop @to while $#to and $to[$#to] == $to[$#to -1];
3405 }
6e90668e
SM
3406 my($from, $to);
3407 $from = collapse(@from);
3408 $to = collapse(@to);
3409 $from .= "-" if $delhyphen;
f4a44678
SM
3410 return ($from, $to);
3411}
3412
3413sub tr_chr {
3414 my $x = shift;
3415 if ($x == ord "-") {
3416 return "\\-";
2a9e2f8a
RH
3417 } elsif ($x == ord "\\") {
3418 return "\\\\";
f4a44678
SM
3419 } else {
3420 return chr $x;
3421 }
3422}
3423
3424# XXX This doesn't yet handle all cases correctly either
3425
3426sub tr_decode_utf8 {
3427 my($swash_hv, $flags) = @_;
3428 my %swash = $swash_hv->ARRAY;
3429 my $final = undef;
3430 $final = $swash{'FINAL'}->IV if exists $swash{'FINAL'};
3431 my $none = $swash{"NONE"}->IV;
3432 my $extra = $none + 1;
3433 my(@from, @delfrom, @to);
3434 my $line;
3435 foreach $line (split /\n/, $swash{'LIST'}->PV) {
3436 my($min, $max, $result) = split(/\t/, $line);
3437 $min = hex $min;
3438 if (length $max) {
3439 $max = hex $max;
3440 } else {
3441 $max = $min;
3442 }
3443 $result = hex $result;
3444 if ($result == $extra) {
3445 push @delfrom, [$min, $max];
3446 } else {
3447 push @from, [$min, $max];
3448 push @to, [$result, $result + $max - $min];
3449 }
3450 }
3451 for my $i (0 .. $#from) {
3452 if ($from[$i][0] == ord '-') {
3453 unshift @from, splice(@from, $i, 1);
3454 unshift @to, splice(@to, $i, 1);
3455 last;
3456 } elsif ($from[$i][1] == ord '-') {
3457 $from[$i][1]--;
3458 $to[$i][1]--;
3459 unshift @from, ord '-';
3460 unshift @to, ord '-';
3461 last;
3462 }
3463 }
3464 for my $i (0 .. $#delfrom) {
3465 if ($delfrom[$i][0] == ord '-') {
3466 push @delfrom, splice(@delfrom, $i, 1);
3467 last;
3468 } elsif ($delfrom[$i][1] == ord '-') {
3469 $delfrom[$i][1]--;
3470 push @delfrom, ord '-';
3471 last;
3472 }
3473 }
3474 if (defined $final and $to[$#to][1] != $final) {
3475 push @to, [$final, $final];
3476 }
3477 push @from, @delfrom;
3478 if ($flags & OPpTRANS_COMPLEMENT) {
3479 my @newfrom;
3480 my $next = 0;
3481 for my $i (0 .. $#from) {
3482 push @newfrom, [$next, $from[$i][0] - 1];
3483 $next = $from[$i][1] + 1;
3484 }
3485 @from = ();
3486 for my $range (@newfrom) {
3487 if ($range->[0] <= $range->[1]) {
3488 push @from, $range;
3489 }
3490 }
3491 }
3492 my($from, $to, $diff);
3493 for my $chunk (@from) {
3494 $diff = $chunk->[1] - $chunk->[0];
3495 if ($diff > 1) {
3496 $from .= tr_chr($chunk->[0]) . "-" . tr_chr($chunk->[1]);
3497 } elsif ($diff == 1) {
3498 $from .= tr_chr($chunk->[0]) . tr_chr($chunk->[1]);
3499 } else {
3500 $from .= tr_chr($chunk->[0]);
3501 }
3502 }
3503 for my $chunk (@to) {
3504 $diff = $chunk->[1] - $chunk->[0];
3505 if ($diff > 1) {
3506 $to .= tr_chr($chunk->[0]) . "-" . tr_chr($chunk->[1]);
3507 } elsif ($diff == 1) {
3508 $to .= tr_chr($chunk->[0]) . tr_chr($chunk->[1]);
3509 } else {
3510 $to .= tr_chr($chunk->[0]);
3511 }
3512 }
3513 #$final = sprintf("%04x", $final) if defined $final;
3514 #$none = sprintf("%04x", $none) if defined $none;
3515 #$extra = sprintf("%04x", $extra) if defined $extra;
3516 #print STDERR "final: $final\n none: $none\nextra: $extra\n";
3517 #print STDERR $swash{'LIST'}->PV;
3518 return (escape_str($from), escape_str($to));
3519}
3520
3521sub pp_trans {
3522 my $self = shift;
3523 my($op, $cx) = @_;
3524 my($from, $to);
3525 if (class($op) eq "PVOP") {
3526 ($from, $to) = tr_decode_byte($op->pv, $op->private);
3527 } else { # class($op) eq "SVOP"
3528 ($from, $to) = tr_decode_utf8($op->sv->RV, $op->private);
3529 }
3530 my $flags = "";
3531 $flags .= "c" if $op->private & OPpTRANS_COMPLEMENT;
3532 $flags .= "d" if $op->private & OPpTRANS_DELETE;
3533 $to = "" if $from eq $to and $flags eq "";
3534 $flags .= "s" if $op->private & OPpTRANS_SQUASH;
6e90668e
SM
3535 return "tr" . double_delim($from, $to) . $flags;
3536}
3537
3538# Like dq(), but different
3539sub re_dq {
3540 my $self = shift;
a9760014
RH
3541 my ($op, $extended) = @_;
3542
3f872cb9
GS
3543 my $type = $op->name;
3544 if ($type eq "const") {
f3402b25 3545 return '$[' if $op->private & OPpCONST_ARYBASE;
a9760014
RH
3546 my $unbacked = re_unback($self->const_sv($op)->as_string);
3547 return re_uninterp_extended(escape_extended_re($unbacked))
3548 if $extended;
3549 return re_uninterp(escape_str($unbacked));
3f872cb9 3550 } elsif ($type eq "concat") {
a9760014
RH
3551 my $first = $self->re_dq($op->first, $extended);
3552 my $last = $self->re_dq($op->last, $extended);
b73b7152 3553
a0e66df8 3554 # Disambiguate "${foo}bar", "${foo}{bar}", "${foo}[1]"
b73b7152
JH
3555 ($last =~ /^[A-Z\\\^\[\]_?]/ &&
3556 $first =~ s/([\$@])\^$/${1}{^}/) # "${^}W" etc
3557 || ($last =~ /^[{\[\w_]/ &&
3558 $first =~ s/([\$@])([A-Za-z_]\w*)$/${1}{$2}/);
3559
a0e66df8 3560 return $first . $last;
3f872cb9 3561 } elsif ($type eq "uc") {
a9760014 3562 return '\U' . $self->re_dq($op->first->sibling, $extended) . '\E';
3f872cb9 3563 } elsif ($type eq "lc") {
a9760014 3564 return '\L' . $self->re_dq($op->first->sibling, $extended) . '\E';
3f872cb9 3565 } elsif ($type eq "ucfirst") {
a9760014 3566 return '\u' . $self->re_dq($op->first->sibling, $extended);
3f872cb9 3567 } elsif ($type eq "lcfirst") {
a9760014 3568 return '\l' . $self->re_dq($op->first->sibling, $extended);
3f872cb9 3569 } elsif ($type eq "quotemeta") {
a9760014 3570 return '\Q' . $self->re_dq($op->first->sibling, $extended) . '\E';
3f872cb9 3571 } elsif ($type eq "join") {
9d2c6865 3572 return $self->deparse($op->last, 26); # was join($", @ary)
6e90668e 3573 } else {
9d2c6865 3574 return $self->deparse($op, 26);
6e90668e
SM
3575 }
3576}
3577
a9760014
RH
3578sub pure_string {
3579 my ($self, $op) = @_;
3580 my $type = $op->name;
3581
3582 if ($type eq 'const') {
3583 return 1;
3584 }
3585 elsif ($type =~ /^[ul]c(first)?$/ || $type eq 'quotemeta') {
3586 return $self->pure_string($op->first->sibling);
3587 }
3588 elsif ($type eq 'join') {
3589 my $join_op = $op->first->sibling; # Skip pushmark
3590 return 0 unless $join_op->name eq 'null' && $join_op->targ eq OP_RV2SV;
3591
3592 my $gvop = $join_op->first;