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6e90668e 1# B::Deparse.pm
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2# Copyright (c) 1998-2000, 2002, 2003, 2004, 2005, 2006 Stephen McCamant.
3# All rights reserved.
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4# This module is free software; you can redistribute and/or modify
5# it under the same terms as Perl itself.
6
7# This is based on the module of the same name by Malcolm Beattie,
8# but essentially none of his code remains.
9
a798dbf2 10package B::Deparse;
ff97752d 11use Carp;
51a5edaf 12use B qw(class main_root main_start main_cv svref_2object opnumber perlstring
bd0865ec 13 OPf_WANT OPf_WANT_VOID OPf_WANT_SCALAR OPf_WANT_LIST
2be95ceb 14 OPf_KIDS OPf_REF OPf_STACKED OPf_SPECIAL OPf_MOD
ce4e655d 15 OPpLVAL_INTRO OPpOUR_INTRO OPpENTERSUB_AMPER OPpSLICE OPpCONST_BARE
3ed82cfc 16 OPpTRANS_SQUASH OPpTRANS_DELETE OPpTRANS_COMPLEMENT OPpTARGET_MY
7e80da18 17 OPpCONST_ARYBASE OPpEXISTS_SUB OPpSORT_NUMERIC OPpSORT_INTEGER
2be95ceb 18 OPpSORT_REVERSE
d989cdac 19 SVf_IOK SVf_NOK SVf_ROK SVf_POK SVpad_OUR SVf_FAKE SVs_RMG SVs_SMG
e95ab0c0 20 CVf_METHOD CVf_LVALUE
2be95ceb 21 PMf_KEEP PMf_GLOBAL PMf_CONTINUE PMf_EVAL PMf_ONCE
7c1f70cb 22 PMf_MULTILINE PMf_SINGLELINE PMf_FOLD PMf_EXTENDED),
2be95ceb
NC
23 ($] < 5.008004 ? () : 'OPpSORT_INPLACE'),
24 ($] < 5.008006 ? () : qw(OPpSORT_DESCEND OPpITER_REVERSED)),
25 ($] < 5.008009 ? () : qw(OPpCONST_NOVER OPpPAD_STATE)),
26 ($] < 5.009 ? 'PMf_SKIPWHITE' : qw(RXf_SKIPWHITE)),
27 ($] < 5.011 ? 'CVf_LOCKED' : 'OPpREVERSE_INPLACE'),
28 ($] < 5.013 ? () : 'PMf_NONDESTRUCT');
e57c1822 29$VERSION = "1.02";
a798dbf2 30use strict;
2ae48fff 31use vars qw/$AUTOLOAD/;
34a48b4b 32use warnings ();
a798dbf2 33
aa381260 34BEGIN {
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NC
35 # Easiest way to keep this code portable between version looks to
36 # be to fake up a dummy constant that will never actually be true.
37 foreach (qw(OPpSORT_INPLACE OPpSORT_DESCEND OPpITER_REVERSED OPpCONST_NOVER
38 OPpPAD_STATE RXf_SKIPWHITE CVf_LOCKED OPpREVERSE_INPLACE
39 PMf_NONDESTRUCT)) {
40 no strict 'refs';
41 *{$_} = sub () {0} unless *{$_}{CODE};
42 }
aa381260
NC
43}
44
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45# Changes between 0.50 and 0.51:
46# - fixed nulled leave with live enter in sort { }
47# - fixed reference constants (\"str")
48# - handle empty programs gracefully
49# - handle infinte loops (for (;;) {}, while (1) {})
50# - differentiate between `for my $x ...' and `my $x; for $x ...'
51# - various minor cleanups
52# - moved globals into an object
53# - added `-u', like B::C
54# - package declarations using cop_stash
55# - subs, formats and code sorted by cop_seq
f6f9bdb7 56# Changes between 0.51 and 0.52:
4d1ff10f 57# - added pp_threadsv (special variables under USE_5005THREADS)
f6f9bdb7 58# - added documentation
bd0865ec 59# Changes between 0.52 and 0.53:
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60# - many changes adding precedence contexts and associativity
61# - added `-p' and `-s' output style options
62# - various other minor fixes
bd0865ec 63# Changes between 0.53 and 0.54:
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64# - added support for new `for (1..100)' optimization,
65# thanks to Gisle Aas
bd0865ec 66# Changes between 0.54 and 0.55:
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67# - added support for new qr// construct
68# - added support for new pp_regcreset OP
bd0865ec 69# Changes between 0.55 and 0.56:
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70# - tested on base/*.t, cmd/*.t, comp/*.t, io/*.t
71# - fixed $# on non-lexicals broken in last big rewrite
72# - added temporary fix for change in opcode of OP_STRINGIFY
73# - fixed problem in 0.54's for() patch in `for (@ary)'
74# - fixed precedence in conditional of ?:
75# - tweaked list paren elimination in `my($x) = @_'
76# - made continue-block detection trickier wrt. null ops
77# - fixed various prototype problems in pp_entersub
78# - added support for sub prototypes that never get GVs
79# - added unquoting for special filehandle first arg in truncate
80# - print doubled rv2gv (a bug) as `*{*GV}' instead of illegal `**GV'
81# - added semicolons at the ends of blocks
82# - added -l `#line' declaration option -- fixes cmd/subval.t 27,28
bd0865ec
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83# Changes between 0.56 and 0.561:
84# - fixed multiply-declared my var in pp_truncate (thanks to Sarathy)
85# - used new B.pm symbolic constants (done by Nick Ing-Simmons)
86# Changes between 0.561 and 0.57:
87# - stylistic changes to symbolic constant stuff
88# - handled scope in s///e replacement code
89# - added unquote option for expanding "" into concats, etc.
90# - split method and proto parts of pp_entersub into separate functions
91# - various minor cleanups
f4a44678
SM
92# Changes after 0.57:
93# - added parens in \&foo (patch by Albert Dvornik)
94# Changes between 0.57 and 0.58:
95# - fixed `0' statements that weren't being printed
96# - added methods for use from other programs
97# (based on patches from James Duncan and Hugo van der Sanden)
98# - added -si and -sT to control indenting (also based on a patch from Hugo)
99# - added -sv to print something else instead of '???'
100# - preliminary version of utf8 tr/// handling
3ed82cfc
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101# Changes after 0.58:
102# - uses of $op->ppaddr changed to new $op->name (done by Sarathy)
d989cdac 103# - added support for Hugo's new OP_SETSTATE (like nextstate)
3ed82cfc
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104# Changes between 0.58 and 0.59
105# - added support for Chip's OP_METHOD_NAMED
106# - added support for Ilya's OPpTARGET_MY optimization
107# - elided arrows before `()' subscripts when possible
58cccf98
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108# Changes between 0.59 and 0.60
109# - support for method attribues was added
110# - some warnings fixed
111# - separate recognition of constant subs
112# - rewrote continue block handling, now recoginizing for loops
113# - added more control of expanding control structures
c7f67cde
RH
114# Changes between 0.60 and 0.61 (mostly by Robin Houston)
115# - many bug-fixes
116# - support for pragmas and 'use'
117# - support for the little-used $[ variable
118# - support for __DATA__ sections
119# - UTF8 support
120# - BEGIN, CHECK, INIT and END blocks
121# - scoping of subroutine declarations fixed
122# - compile-time output from the input program can be suppressed, so that the
123# output is just the deparsed code. (a change to O.pm in fact)
124# - our() declarations
125# - *all* the known bugs are now listed in the BUGS section
126# - comprehensive test mechanism (TEST -deparse)
9a58b761
RGS
127# Changes between 0.62 and 0.63 (mostly by Rafael Garcia-Suarez)
128# - bug-fixes
129# - new switch -P
130# - support for command-line switches (-l, -0, etc.)
d989cdac
SM
131# Changes between 0.63 and 0.64
132# - support for //, CHECK blocks, and assertions
133# - improved handling of foreach loops and lexicals
134# - option to use Data::Dumper for constants
135# - more bug fixes
136# - discovered lots more bugs not yet fixed
0d863452
RH
137#
138# ...
139#
140# Changes between 0.72 and 0.73
141# - support new switch constructs
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142
143# Todo:
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RH
144# (See also BUGS section at the end of this file)
145#
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146# - finish tr/// changes
147# - add option for even more parens (generalize \&foo change)
90be192f 148# - left/right context
58cccf98 149# - copy comments (look at real text with $^P?)
f5aa8f4e 150# - avoid semis in one-statement blocks
9d2c6865 151# - associativity of &&=, ||=, ?:
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152# - ',' => '=>' (auto-unquote?)
153# - break long lines ("\r" as discretionary break?)
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154# - configurable syntax highlighting: ANSI color, HTML, TeX, etc.
155# - more style options: brace style, hex vs. octal, quotes, ...
156# - print big ints as hex/octal instead of decimal (heuristic?)
3ed82cfc 157# - handle `my $x if 0'?
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158# - version using op_next instead of op_first/sibling?
159# - avoid string copies (pass arrays, one big join?)
9d2c6865 160# - here-docs?
6e90668e 161
d989cdac 162# Current test.deparse failures
d989cdac
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163# comp/hints 6 - location of BEGIN blocks wrt. block openings
164# run/switchI 1 - missing -I switches entirely
165# perl -Ifoo -e 'print @INC'
166# op/caller 2 - warning mask propagates backwards before warnings::register
167# 'use warnings; BEGIN {${^WARNING_BITS} eq "U"x12;} use warnings::register'
168# op/getpid 2 - can't assign to shared my() declaration (threads only)
169# 'my $x : shared = 5'
170# op/override 7 - parens on overriden require change v-string interpretation
171# 'BEGIN{*CORE::GLOBAL::require=sub {}} require v5.6'
172# c.f. 'BEGIN { *f = sub {0} }; f 2'
173# op/pat 774 - losing Unicode-ness of Latin1-only strings
174# 'use charnames ":short"; $x="\N{latin:a with acute}"'
175# op/recurse 12 - missing parens on recursive call makes it look like method
176# 'sub f { f($x) }'
177# op/subst 90 - inconsistent handling of utf8 under "use utf8"
178# op/taint 29 - "use re 'taint'" deparsed in the wrong place wrt. block open
179# op/tiehandle compile - "use strict" deparsed in the wrong place
180# uni/tr_ several
181# ext/B/t/xref 11 - line numbers when we add newlines to one-line subs
182# ext/Data/Dumper/t/dumper compile
183# ext/DB_file/several
184# ext/Encode/several
185# ext/Ernno/Errno warnings
186# ext/IO/lib/IO/t/io_sel 23
187# ext/PerlIO/t/encoding compile
188# ext/POSIX/t/posix 6
189# ext/Socket/Socket 8
190# ext/Storable/t/croak compile
191# lib/Attribute/Handlers/t/multi compile
192# lib/bignum/ several
193# lib/charnames 35
194# lib/constant 32
195# lib/English 40
196# lib/ExtUtils/t/bytes 4
197# lib/File/DosGlob compile
198# lib/Filter/Simple/t/data 1
199# lib/Math/BigInt/t/constant 1
200# lib/Net/t/config Deparse-warning
201# lib/overload compile
202# lib/Switch/ several
203# lib/Symbol 4
204# lib/Test/Simple several
205# lib/Term/Complete
206# lib/Tie/File/t/29_downcopy 5
207# lib/vars 22
f5aa8f4e 208
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209# Object fields (were globals):
210#
211# avoid_local:
212# (local($a), local($b)) and local($a, $b) have the same internal
213# representation but the short form looks better. We notice we can
214# use a large-scale local when checking the list, but need to prevent
d989cdac 215# individual locals too. This hash holds the addresses of OPs that
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SM
216# have already had their local-ness accounted for. The same thing
217# is done with my().
218#
219# curcv:
220# CV for current sub (or main program) being deparsed
221#
8510e997
RH
222# curcvlex:
223# Cached hash of lexical variables for curcv: keys are names,
224# each value is an array of pairs, indicating the cop_seq of scopes
225# in which a var of that name is valid.
226#
34a48b4b
RH
227# curcop:
228# COP for statement being deparsed
229#
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230# curstash:
231# name of the current package for deparsed code
232#
233# subs_todo:
34a48b4b 234# array of [cop_seq, CV, is_format?] for subs and formats we still
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235# want to deparse
236#
f5aa8f4e
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237# protos_todo:
238# as above, but [name, prototype] for subs that never got a GV
239#
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240# subs_done, forms_done:
241# keys are addresses of GVs for subs and formats we've already
242# deparsed (or at least put into subs_todo)
9d2c6865 243#
0ca62a8e
RH
244# subs_declared
245# keys are names of subs for which we've printed declarations.
246# That means we can omit parentheses from the arguments.
247#
1d38190f
RGS
248# subs_deparsed
249# Keeps track of fully qualified names of all deparsed subs.
250#
9d2c6865 251# parens: -p
f5aa8f4e 252# linenums: -l
bd0865ec 253# unquote: -q
9d2c6865 254# cuddle: ` ' or `\n', depending on -sC
f4a44678
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255# indent_size: -si
256# use_tabs: -sT
257# ex_const: -sv
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258
259# A little explanation of how precedence contexts and associativity
260# work:
261#
262# deparse() calls each per-op subroutine with an argument $cx (short
263# for context, but not the same as the cx* in the perl core), which is
264# a number describing the op's parents in terms of precedence, whether
f5aa8f4e 265# they're inside an expression or at statement level, etc. (see
9d2c6865
SM
266# chart below). When ops with children call deparse on them, they pass
267# along their precedence. Fractional values are used to implement
268# associativity (`($x + $y) + $z' => `$x + $y + $y') and related
269# parentheses hacks. The major disadvantage of this scheme is that
270# it doesn't know about right sides and left sides, so say if you
271# assign a listop to a variable, it can't tell it's allowed to leave
272# the parens off the listop.
273
274# Precedences:
275# 26 [TODO] inside interpolation context ("")
276# 25 left terms and list operators (leftward)
277# 24 left ->
278# 23 nonassoc ++ --
279# 22 right **
280# 21 right ! ~ \ and unary + and -
281# 20 left =~ !~
282# 19 left * / % x
283# 18 left + - .
284# 17 left << >>
285# 16 nonassoc named unary operators
286# 15 nonassoc < > <= >= lt gt le ge
287# 14 nonassoc == != <=> eq ne cmp
288# 13 left &
289# 12 left | ^
290# 11 left &&
291# 10 left ||
292# 9 nonassoc .. ...
293# 8 right ?:
294# 7 right = += -= *= etc.
295# 6 left , =>
296# 5 nonassoc list operators (rightward)
297# 4 right not
298# 3 left and
299# 2 left or xor
300# 1 statement modifiers
d989cdac 301# 0.5 statements, but still print scopes as do { ... }
9d2c6865
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302# 0 statement level
303
304# Nonprinting characters with special meaning:
305# \cS - steal parens (see maybe_parens_unop)
306# \n - newline and indent
307# \t - increase indent
308# \b - decrease indent (`outdent')
f5aa8f4e 309# \f - flush left (no indent)
9d2c6865 310# \cK - kill following semicolon, if any
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311
312sub null {
313 my $op = shift;
314 return class($op) eq "NULL";
315}
316
317sub todo {
318 my $self = shift;
34a48b4b 319 my($cv, $is_form) = @_;
e31885a0 320 return unless ($cv->FILE eq $0 || exists $self->{files}{$cv->FILE});
6e90668e 321 my $seq;
d989cdac
SM
322 if ($cv->OUTSIDE_SEQ) {
323 $seq = $cv->OUTSIDE_SEQ;
324 } elsif (!null($cv->START) and is_state($cv->START)) {
6e90668e
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325 $seq = $cv->START->cop_seq;
326 } else {
327 $seq = 0;
328 }
34a48b4b 329 push @{$self->{'subs_todo'}}, [$seq, $cv, $is_form];
1d38190f
RGS
330 unless ($is_form || class($cv->STASH) eq 'SPECIAL') {
331 $self->{'subs_deparsed'}{$cv->STASH->NAME."::".$cv->GV->NAME} = 1;
332 }
6e90668e
SM
333}
334
335sub next_todo {
336 my $self = shift;
337 my $ent = shift @{$self->{'subs_todo'}};
34a48b4b
RH
338 my $cv = $ent->[1];
339 my $gv = $cv->GV;
340 my $name = $self->gv_name($gv);
6e90668e
SM
341 if ($ent->[2]) {
342 return "format $name =\n"
e31885a0 343 . $self->deparse_format($ent->[1]). "\n";
6e90668e 344 } else {
0ca62a8e 345 $self->{'subs_declared'}{$name} = 1;
34a48b4b
RH
346 if ($name eq "BEGIN") {
347 my $use_dec = $self->begin_is_use($cv);
d989cdac 348 if (defined ($use_dec) and $self->{'expand'} < 5) {
0e7fe0f0
RH
349 return () if 0 == length($use_dec);
350 return $use_dec;
351 }
34a48b4b 352 }
a0035eb8
RH
353 my $l = '';
354 if ($self->{'linenums'}) {
355 my $line = $gv->LINE;
356 my $file = $gv->FILE;
357 $l = "\n\f#line $line \"$file\"\n";
358 }
127212b2
DM
359 my $p = '';
360 if (class($cv->STASH) ne "SPECIAL") {
361 my $stash = $cv->STASH->NAME;
362 if ($stash ne $self->{'curstash'}) {
363 $p = "package $stash;\n";
364 $name = "$self->{'curstash'}::$name" unless $name =~ /::/;
365 $self->{'curstash'} = $stash;
366 }
8b2d6640 367 $name =~ s/^\Q$stash\E::(?!\z|.*::)//;
127212b2
DM
368 }
369 return "${p}${l}sub $name " . $self->deparse_sub($cv);
34a48b4b
RH
370 }
371}
372
373# Return a "use" declaration for this BEGIN block, if appropriate
374sub begin_is_use {
375 my ($self, $cv) = @_;
376 my $root = $cv->ROOT;
80dc0729 377 local @$self{qw'curcv curcvlex'} = ($cv);
34a48b4b
RH
378#require B::Debug;
379#B::walkoptree($cv->ROOT, "debug");
380 my $lineseq = $root->first;
381 return if $lineseq->name ne "lineseq";
382
383 my $req_op = $lineseq->first->sibling;
384 return if $req_op->name ne "require";
385
386 my $module;
387 if ($req_op->first->private & OPpCONST_BARE) {
388 # Actually it should always be a bareword
389 $module = $self->const_sv($req_op->first)->PV;
390 $module =~ s[/][::]g;
391 $module =~ s/.pm$//;
392 }
393 else {
d989cdac 394 $module = $self->const($self->const_sv($req_op->first), 6);
34a48b4b
RH
395 }
396
397 my $version;
398 my $version_op = $req_op->sibling;
399 return if class($version_op) eq "NULL";
400 if ($version_op->name eq "lineseq") {
401 # We have a version parameter; skip nextstate & pushmark
402 my $constop = $version_op->first->next->next;
403
404 return unless $self->const_sv($constop)->PV eq $module;
405 $constop = $constop->sibling;
a58644de 406 $version = $self->const_sv($constop);
d989cdac
SM
407 if (class($version) eq "IV") {
408 $version = $version->int_value;
409 } elsif (class($version) eq "NV") {
410 $version = $version->NV;
411 } elsif (class($version) ne "PVMG") {
412 # Includes PVIV and PVNV
a58644de
RGS
413 $version = $version->PV;
414 } else {
415 # version specified as a v-string
416 $version = 'v'.join '.', map ord, split //, $version->PV;
417 }
34a48b4b
RH
418 $constop = $constop->sibling;
419 return if $constop->name ne "method_named";
420 return if $self->const_sv($constop)->PV ne "VERSION";
421 }
422
423 $lineseq = $version_op->sibling;
424 return if $lineseq->name ne "lineseq";
425 my $entersub = $lineseq->first->sibling;
426 if ($entersub->name eq "stub") {
427 return "use $module $version ();\n" if defined $version;
428 return "use $module ();\n";
429 }
430 return if $entersub->name ne "entersub";
431
432 # See if there are import arguments
433 my $args = '';
434
6ec152c3
RH
435 my $svop = $entersub->first->sibling; # Skip over pushmark
436 return unless $self->const_sv($svop)->PV eq $module;
34a48b4b
RH
437
438 # Pull out the arguments
6ec152c3
RH
439 for ($svop=$svop->sibling; $svop->name ne "method_named";
440 $svop = $svop->sibling) {
34a48b4b 441 $args .= ", " if length($args);
6ec152c3 442 $args .= $self->deparse($svop, 6);
34a48b4b
RH
443 }
444
445 my $use = 'use';
6ec152c3 446 my $method_named = $svop;
34a48b4b
RH
447 return if $method_named->name ne "method_named";
448 my $method_name = $self->const_sv($method_named)->PV;
449
450 if ($method_name eq "unimport") {
451 $use = 'no';
452 }
453
454 # Certain pragmas are dealt with using hint bits,
455 # so we ignore them here
456 if ($module eq 'strict' || $module eq 'integer'
0ced6c29
RGS
457 || $module eq 'bytes' || $module eq 'warnings'
458 || $module eq 'feature') {
34a48b4b
RH
459 return "";
460 }
461
462 if (defined $version && length $args) {
463 return "$use $module $version ($args);\n";
464 } elsif (defined $version) {
465 return "$use $module $version;\n";
466 } elsif (length $args) {
467 return "$use $module ($args);\n";
468 } else {
469 return "$use $module;\n";
6e90668e
SM
470 }
471}
472
6e90668e 473sub stash_subs {
34a48b4b
RH
474 my ($self, $pack) = @_;
475 my (@ret, $stash);
476 if (!defined $pack) {
477 $pack = '';
478 $stash = \%::;
f5aa8f4e 479 }
34a48b4b
RH
480 else {
481 $pack =~ s/(::)?$/::/;
482 no strict 'refs';
483 $stash = \%$pack;
484 }
485 my %stash = svref_2object($stash)->ARRAY;
486 while (my ($key, $val) = each %stash) {
f5aa8f4e
SM
487 my $class = class($val);
488 if ($class eq "PV") {
a0035eb8
RH
489 # Just a prototype. As an ugly but fairly effective way
490 # to find out if it belongs here is to see if the AUTOLOAD
491 # (if any) for the stash was defined in one of our files.
492 my $A = $stash{"AUTOLOAD"};
493 if (defined ($A) && class($A) eq "GV" && defined($A->CV)
494 && class($A->CV) eq "CV") {
495 my $AF = $A->FILE;
496 next unless $AF eq $0 || exists $self->{'files'}{$AF};
497 }
f5aa8f4e 498 push @{$self->{'protos_todo'}}, [$pack . $key, $val->PV];
5b4ee549 499 } elsif ($class eq "IV" && !($val->FLAGS & SVf_ROK)) {
a0035eb8 500 # Just a name. As above.
5b4ee549
NC
501 # But skip proxy constant subroutines, as some form of perl-space
502 # visible code must have created them, be it a use statement, or
503 # some direct symbol-table manipulation code that we will Deparse
a0035eb8
RH
504 my $A = $stash{"AUTOLOAD"};
505 if (defined ($A) && class($A) eq "GV" && defined($A->CV)
506 && class($A->CV) eq "CV") {
507 my $AF = $A->FILE;
508 next unless $AF eq $0 || exists $self->{'files'}{$AF};
509 }
d989cdac 510 push @{$self->{'protos_todo'}}, [$pack . $key, undef];
f5aa8f4e 511 } elsif ($class eq "GV") {
34a48b4b 512 if (class(my $cv = $val->CV) ne "SPECIAL") {
f5aa8f4e 513 next if $self->{'subs_done'}{$$val}++;
e31885a0 514 next if $$val != ${$cv->GV}; # Ignore imposters
8510e997 515 $self->todo($cv, 0);
f5aa8f4e 516 }
e31885a0 517 if (class(my $cv = $val->FORM) ne "SPECIAL") {
f5aa8f4e 518 next if $self->{'forms_done'}{$$val}++;
e31885a0
RH
519 next if $$val != ${$cv->GV}; # Ignore imposters
520 $self->todo($cv, 1);
f5aa8f4e 521 }
34a48b4b 522 if (class($val->HV) ne "SPECIAL" && $key =~ /::$/) {
8b2d6640
FC
523 $self->stash_subs($pack . $key)
524 unless $pack eq '' && $key eq 'main::';
525 # avoid infinite recursion
34a48b4b 526 }
6e90668e
SM
527 }
528 }
529}
a798dbf2 530
f5aa8f4e
SM
531sub print_protos {
532 my $self = shift;
533 my $ar;
534 my @ret;
535 foreach $ar (@{$self->{'protos_todo'}}) {
536 my $proto = (defined $ar->[1] ? " (". $ar->[1] . ")" : "");
537 push @ret, "sub " . $ar->[0] . "$proto;\n";
538 }
539 delete $self->{'protos_todo'};
540 return @ret;
541}
542
9d2c6865
SM
543sub style_opts {
544 my $self = shift;
545 my $opts = shift;
546 my $opt;
547 while (length($opt = substr($opts, 0, 1))) {
548 if ($opt eq "C") {
549 $self->{'cuddle'} = " ";
f4a44678
SM
550 $opts = substr($opts, 1);
551 } elsif ($opt eq "i") {
552 $opts =~ s/^i(\d+)//;
553 $self->{'indent_size'} = $1;
554 } elsif ($opt eq "T") {
555 $self->{'use_tabs'} = 1;
556 $opts = substr($opts, 1);
557 } elsif ($opt eq "v") {
558 $opts =~ s/^v([^.]*)(.|$)//;
559 $self->{'ex_const'} = $1;
9d2c6865 560 }
9d2c6865
SM
561 }
562}
563
f4a44678
SM
564sub new {
565 my $class = shift;
566 my $self = bless {}, $class;
f4a44678 567 $self->{'cuddle'} = "\n";
d989cdac
SM
568 $self->{'curcop'} = undef;
569 $self->{'curstash'} = "main";
570 $self->{'ex_const'} = "'???'";
793e2a70 571 $self->{'expand'} = 0;
d989cdac
SM
572 $self->{'files'} = {};
573 $self->{'indent_size'} = 4;
793e2a70
RH
574 $self->{'linenums'} = 0;
575 $self->{'parens'} = 0;
d989cdac
SM
576 $self->{'subs_todo'} = [];
577 $self->{'unquote'} = 0;
578 $self->{'use_dumper'} = 0;
579 $self->{'use_tabs'} = 0;
08c6f5ec
RH
580
581 $self->{'ambient_arybase'} = 0;
e31885a0 582 $self->{'ambient_warnings'} = undef; # Assume no lexical warnings
a0405c92 583 $self->{'ambient_hints'} = 0;
0ced6c29 584 $self->{'ambient_hinthash'} = undef;
08c6f5ec
RH
585 $self->init();
586
f4a44678 587 while (my $arg = shift @_) {
d989cdac
SM
588 if ($arg eq "-d") {
589 $self->{'use_dumper'} = 1;
590 require Data::Dumper;
591 } elsif ($arg =~ /^-f(.*)/) {
34a48b4b 592 $self->{'files'}{$1} = 1;
d989cdac
SM
593 } elsif ($arg eq "-l") {
594 $self->{'linenums'} = 1;
f4a44678
SM
595 } elsif ($arg eq "-p") {
596 $self->{'parens'} = 1;
acaaef34
RGS
597 } elsif ($arg eq "-P") {
598 $self->{'noproto'} = 1;
f4a44678
SM
599 } elsif ($arg eq "-q") {
600 $self->{'unquote'} = 1;
601 } elsif (substr($arg, 0, 2) eq "-s") {
602 $self->style_opts(substr $arg, 2);
58cccf98
SM
603 } elsif ($arg =~ /^-x(\d)$/) {
604 $self->{'expand'} = $1;
f4a44678
SM
605 }
606 }
607 return $self;
608}
609
810aef70
RH
610{
611 # Mask out the bits that L<warnings::register> uses
612 my $WARN_MASK;
613 BEGIN {
614 $WARN_MASK = $warnings::Bits{all} | $warnings::DeadBits{all};
615 }
616 sub WARN_MASK () {
617 return $WARN_MASK;
618 }
34a48b4b
RH
619}
620
08c6f5ec
RH
621# Initialise the contextual information, either from
622# defaults provided with the ambient_pragmas method,
623# or from perl's own defaults otherwise.
624sub init {
625 my $self = shift;
626
627 $self->{'arybase'} = $self->{'ambient_arybase'};
e31885a0
RH
628 $self->{'warnings'} = defined ($self->{'ambient_warnings'})
629 ? $self->{'ambient_warnings'} & WARN_MASK
630 : undef;
d5ec2987 631 $self->{'hints'} = $self->{'ambient_hints'};
e412117e 632 $self->{'hints'} &= 0xFF if $] < 5.009;
0ced6c29 633 $self->{'hinthash'} = $self->{'ambient_hinthash'};
217aba5d
RH
634
635 # also a convenient place to clear out subs_declared
636 delete $self->{'subs_declared'};
08c6f5ec
RH
637}
638
a798dbf2 639sub compile {
6e90668e 640 my(@args) = @_;
d989cdac 641 return sub {
f4a44678 642 my $self = B::Deparse->new(@args);
d2bc402e
RGS
643 # First deparse command-line args
644 if (defined $^I) { # deparse -i
51a5edaf 645 print q(BEGIN { $^I = ).perlstring($^I).qq(; }\n);
d2bc402e
RGS
646 }
647 if ($^W) { # deparse -w
648 print qq(BEGIN { \$^W = $^W; }\n);
649 }
650 if ($/ ne "\n" or defined $O::savebackslash) { # deparse -l and -0
51a5edaf
RGS
651 my $fs = perlstring($/) || 'undef';
652 my $bs = perlstring($O::savebackslash) || 'undef';
d2bc402e
RGS
653 print qq(BEGIN { \$/ = $fs; \$\\ = $bs; }\n);
654 }
34a48b4b 655 my @BEGINs = B::begin_av->isa("B::AV") ? B::begin_av->ARRAY : ();
676456c2
AG
656 my @UNITCHECKs = B::unitcheck_av->isa("B::AV")
657 ? B::unitcheck_av->ARRAY
658 : ();
ece599bd 659 my @CHECKs = B::check_av->isa("B::AV") ? B::check_av->ARRAY : ();
34a48b4b
RH
660 my @INITs = B::init_av->isa("B::AV") ? B::init_av->ARRAY : ();
661 my @ENDs = B::end_av->isa("B::AV") ? B::end_av->ARRAY : ();
676456c2 662 for my $block (@BEGINs, @UNITCHECKs, @CHECKs, @INITs, @ENDs) {
e31885a0 663 $self->todo($block, 0);
34a48b4b
RH
664 }
665 $self->stash_subs();
d989cdac
SM
666 local($SIG{"__DIE__"}) =
667 sub {
668 if ($self->{'curcop'}) {
669 my $cop = $self->{'curcop'};
670 my($line, $file) = ($cop->line, $cop->file);
671 print STDERR "While deparsing $file near line $line,\n";
672 }
673 };
6e90668e 674 $self->{'curcv'} = main_cv;
8510e997 675 $self->{'curcvlex'} = undef;
f5aa8f4e 676 print $self->print_protos;
6e90668e 677 @{$self->{'subs_todo'}} =
f4a44678 678 sort {$a->[0] <=> $b->[0]} @{$self->{'subs_todo'}};
d989cdac 679 print $self->indent($self->deparse_root(main_root)), "\n"
f4a44678 680 unless null main_root;
6e90668e
SM
681 my @text;
682 while (scalar(@{$self->{'subs_todo'}})) {
683 push @text, $self->next_todo;
684 }
6f611a1a 685 print $self->indent(join("", @text)), "\n" if @text;
e31885a0
RH
686
687 # Print __DATA__ section, if necessary
688 no strict 'refs';
96c57f7e
RGS
689 my $laststash = defined $self->{'curcop'}
690 ? $self->{'curcop'}->stash->NAME : $self->{'curstash'};
691 if (defined *{$laststash."::DATA"}{IO}) {
127212b2
DM
692 print "package $laststash;\n"
693 unless $laststash eq $self->{'curstash'};
e31885a0 694 print "__DATA__\n";
96c57f7e 695 print readline(*{$laststash."::DATA"});
e31885a0 696 }
a798dbf2 697 }
a798dbf2
MB
698}
699
f4a44678
SM
700sub coderef2text {
701 my $self = shift;
702 my $sub = shift;
0853f172 703 croak "Usage: ->coderef2text(CODEREF)" unless UNIVERSAL::isa($sub, "CODE");
08c6f5ec
RH
704
705 $self->init();
f4a44678
SM
706 return $self->indent($self->deparse_sub(svref_2object($sub)));
707}
708
08c6f5ec
RH
709sub ambient_pragmas {
710 my $self = shift;
0ced6c29 711 my ($arybase, $hint_bits, $warning_bits, $hinthash) = (0, 0);
08c6f5ec
RH
712
713 while (@_ > 1) {
714 my $name = shift();
715 my $val = shift();
716
717 if ($name eq 'strict') {
718 require strict;
719
720 if ($val eq 'none') {
721 $hint_bits &= ~strict::bits(qw/refs subs vars/);
722 next();
723 }
724
725 my @names;
726 if ($val eq "all") {
727 @names = qw/refs subs vars/;
728 }
729 elsif (ref $val) {
730 @names = @$val;
731 }
732 else {
a0405c92 733 @names = split' ', $val;
08c6f5ec
RH
734 }
735 $hint_bits |= strict::bits(@names);
736 }
737
738 elsif ($name eq '$[') {
739 $arybase = $val;
740 }
741
a0405c92
RH
742 elsif ($name eq 'integer'
743 || $name eq 'bytes'
744 || $name eq 'utf8') {
745 require "$name.pm";
08c6f5ec 746 if ($val) {
a0405c92
RH
747 $hint_bits |= ${$::{"${name}::"}{"hint_bits"}};
748 }
749 else {
750 $hint_bits &= ~${$::{"${name}::"}{"hint_bits"}};
751 }
752 }
753
754 elsif ($name eq 're') {
755 require re;
756 if ($val eq 'none') {
2570cdf1 757 $hint_bits &= ~re::bits(qw/taint eval/);
a0405c92
RH
758 next();
759 }
760
761 my @names;
762 if ($val eq 'all') {
2570cdf1 763 @names = qw/taint eval/;
a0405c92
RH
764 }
765 elsif (ref $val) {
766 @names = @$val;
08c6f5ec
RH
767 }
768 else {
a0405c92 769 @names = split' ',$val;
08c6f5ec 770 }
a0405c92 771 $hint_bits |= re::bits(@names);
08c6f5ec
RH
772 }
773
774 elsif ($name eq 'warnings') {
08c6f5ec 775 if ($val eq 'none') {
810aef70 776 $warning_bits = $warnings::NONE;
08c6f5ec
RH
777 next();
778 }
779
780 my @names;
781 if (ref $val) {
782 @names = @$val;
783 }
784 else {
785 @names = split/\s+/, $val;
786 }
787
810aef70 788 $warning_bits = $warnings::NONE if !defined ($warning_bits);
08c6f5ec
RH
789 $warning_bits |= warnings::bits(@names);
790 }
791
792 elsif ($name eq 'warning_bits') {
793 $warning_bits = $val;
794 }
795
796 elsif ($name eq 'hint_bits') {
797 $hint_bits = $val;
798 }
799
0ced6c29
RGS
800 elsif ($name eq '%^H') {
801 $hinthash = $val;
802 }
803
08c6f5ec
RH
804 else {
805 croak "Unknown pragma type: $name";
806 }
807 }
808 if (@_) {
809 croak "The ambient_pragmas method expects an even number of args";
810 }
811
812 $self->{'ambient_arybase'} = $arybase;
813 $self->{'ambient_warnings'} = $warning_bits;
a0405c92 814 $self->{'ambient_hints'} = $hint_bits;
0ced6c29 815 $self->{'ambient_hinthash'} = $hinthash;
08c6f5ec
RH
816}
817
d989cdac 818# This method is the inner loop, so try to keep it simple
6e90668e
SM
819sub deparse {
820 my $self = shift;
d989cdac 821 my($op, $cx) = @_;
34a48b4b
RH
822
823 Carp::confess("Null op in deparse") if !defined($op)
824 || class($op) eq "NULL";
3f872cb9 825 my $meth = "pp_" . $op->name;
9d2c6865 826 return $self->$meth($op, $cx);
a798dbf2
MB
827}
828
6e90668e 829sub indent {
f4a44678 830 my $self = shift;
6e90668e
SM
831 my $txt = shift;
832 my @lines = split(/\n/, $txt);
833 my $leader = "";
f4a44678 834 my $level = 0;
6e90668e
SM
835 my $line;
836 for $line (@lines) {
f4a44678
SM
837 my $cmd = substr($line, 0, 1);
838 if ($cmd eq "\t" or $cmd eq "\b") {
839 $level += ($cmd eq "\t" ? 1 : -1) * $self->{'indent_size'};
840 if ($self->{'use_tabs'}) {
841 $leader = "\t" x ($level / 8) . " " x ($level % 8);
842 } else {
843 $leader = " " x $level;
844 }
6e90668e
SM
845 $line = substr($line, 1);
846 }
f5aa8f4e
SM
847 if (substr($line, 0, 1) eq "\f") {
848 $line = substr($line, 1); # no indent
849 } else {
850 $line = $leader . $line;
851 }
9d2c6865 852 $line =~ s/\cK;?//g;
6e90668e
SM
853 }
854 return join("\n", @lines);
855}
856
6e90668e
SM
857sub deparse_sub {
858 my $self = shift;
859 my $cv = shift;
860 my $proto = "";
ce4e655d 861Carp::confess("NULL in deparse_sub") if !defined($cv) || $cv->isa("B::NULL");
34a48b4b
RH
862Carp::confess("SPECIAL in deparse_sub") if $cv->isa("B::SPECIAL");
863 local $self->{'curcop'} = $self->{'curcop'};
6e90668e
SM
864 if ($cv->FLAGS & SVf_POK) {
865 $proto = "(". $cv->PV . ") ";
866 }
aa381260 867 if ($cv->CvFLAGS & (CVf_METHOD|CVf_LOCKED|CVf_LVALUE)) {
6aaf4108
SC
868 $proto .= ": ";
869 $proto .= "lvalue " if $cv->CvFLAGS & CVf_LVALUE;
aa381260 870 $proto .= "locked " if $cv->CvFLAGS & CVf_LOCKED;
6aaf4108
SC
871 $proto .= "method " if $cv->CvFLAGS & CVf_METHOD;
872 }
873
6e90668e 874 local($self->{'curcv'}) = $cv;
8510e997 875 local($self->{'curcvlex'});
0ced6c29
RGS
876 local(@$self{qw'curstash warnings hints hinthash'})
877 = @$self{qw'curstash warnings hints hinthash'};
ce4e655d 878 my $body;
6e90668e 879 if (not null $cv->ROOT) {
ce4e655d
RH
880 my $lineseq = $cv->ROOT->first;
881 if ($lineseq->name eq "lineseq") {
882 my @ops;
883 for(my$o=$lineseq->first; $$o; $o=$o->sibling) {
884 push @ops, $o;
885 }
886 $body = $self->lineseq(undef, @ops).";";
887 my $scope_en = $self->find_scope_en($lineseq);
888 if (defined $scope_en) {
889 my $subs = join"", $self->seq_subs($scope_en);
890 $body .= ";\n$subs" if length($subs);
891 }
892 }
893 else {
894 $body = $self->deparse($cv->ROOT->first, 0);
895 }
de3f1649 896 }
ce4e655d
RH
897 else {
898 my $sv = $cv->const_sv;
899 if ($$sv) {
900 # uh-oh. inlinable sub... format it differently
d989cdac 901 return $proto . "{ " . $self->const($sv, 0) . " }\n";
ce4e655d
RH
902 } else { # XSUB? (or just a declaration)
903 return "$proto;\n";
904 }
6e90668e 905 }
ce4e655d 906 return $proto ."{\n\t$body\n\b}" ."\n";
6e90668e
SM
907}
908
909sub deparse_format {
910 my $self = shift;
911 my $form = shift;
912 my @text;
913 local($self->{'curcv'}) = $form;
8510e997 914 local($self->{'curcvlex'});
67fc2416 915 local($self->{'in_format'}) = 1;
0ced6c29
RGS
916 local(@$self{qw'curstash warnings hints hinthash'})
917 = @$self{qw'curstash warnings hints hinthash'};
6e90668e
SM
918 my $op = $form->ROOT;
919 my $kid;
fb725297
RGS
920 return "\f." if $op->first->name eq 'stub'
921 || $op->first->name eq 'nextstate';
6e90668e
SM
922 $op = $op->first->first; # skip leavewrite, lineseq
923 while (not null $op) {
924 $op = $op->sibling; # skip nextstate
925 my @exprs;
926 $kid = $op->first->sibling; # skip pushmark
a5b0cd91 927 push @text, "\f".$self->const_sv($kid)->PV;
6e90668e
SM
928 $kid = $kid->sibling;
929 for (; not null $kid; $kid = $kid->sibling) {
9d2c6865 930 push @exprs, $self->deparse($kid, 0);
6e90668e 931 }
a5b0cd91 932 push @text, "\f".join(", ", @exprs)."\n" if @exprs;
6e90668e
SM
933 $op = $op->sibling;
934 }
a5b0cd91 935 return join("", @text) . "\f.";
6e90668e
SM
936}
937
6e90668e 938sub is_scope {
a798dbf2 939 my $op = shift;
3f872cb9
GS
940 return $op->name eq "leave" || $op->name eq "scope"
941 || $op->name eq "lineseq"
d989cdac 942 || ($op->name eq "null" && class($op) eq "UNOP"
3f872cb9 943 && (is_scope($op->first) || $op->first->name eq "enter"));
6e90668e
SM
944}
945
946sub is_state {
3f872cb9
GS
947 my $name = $_[0]->name;
948 return $name eq "nextstate" || $name eq "dbstate" || $name eq "setstate";
6e90668e
SM
949}
950
951sub is_miniwhile { # check for one-line loop (`foo() while $y--')
952 my $op = shift;
d989cdac 953 return (!null($op) and null($op->sibling)
3f872cb9
GS
954 and $op->name eq "null" and class($op) eq "UNOP"
955 and (($op->first->name =~ /^(and|or)$/
956 and $op->first->first->sibling->name eq "lineseq")
957 or ($op->first->name eq "lineseq"
6e90668e 958 and not null $op->first->first->sibling
3f872cb9 959 and $op->first->first->sibling->name eq "unstack")
6e90668e
SM
960 ));
961}
962
d989cdac
SM
963# Check if the op and its sibling are the initialization and the rest of a
964# for (..;..;..) { ... } loop
965sub is_for_loop {
966 my $op = shift;
967 # This OP might be almost anything, though it won't be a
968 # nextstate. (It's the initialization, so in the canonical case it
eae48c89
Z
969 # will be an sassign.) The sibling is (old style) a lineseq whose
970 # first child is a nextstate and whose second is a leaveloop, or
971 # (new style) an unstack whose sibling is a leaveloop.
d989cdac 972 my $lseq = $op->sibling;
eae48c89
Z
973 return 0 unless !is_state($op) and !null($lseq);
974 if ($lseq->name eq "lineseq") {
d989cdac
SM
975 if ($lseq->first && !null($lseq->first) && is_state($lseq->first)
976 && (my $sib = $lseq->first->sibling)) {
977 return (!null($sib) && $sib->name eq "leaveloop");
978 }
eae48c89
Z
979 } elsif ($lseq->name eq "unstack" && ($lseq->flags & OPf_SPECIAL)) {
980 my $sib = $lseq->sibling;
981 return $sib && !null($sib) && $sib->name eq "leaveloop";
d989cdac
SM
982 }
983 return 0;
984}
985
6e90668e
SM
986sub is_scalar {
987 my $op = shift;
3f872cb9
GS
988 return ($op->name eq "rv2sv" or
989 $op->name eq "padsv" or
990 $op->name eq "gv" or # only in array/hash constructs
bd0865ec 991 $op->flags & OPf_KIDS && !null($op->first)
3f872cb9 992 && $op->first->name eq "gvsv");
6e90668e
SM
993}
994
9d2c6865
SM
995sub maybe_parens {
996 my $self = shift;
997 my($text, $cx, $prec) = @_;
998 if ($prec < $cx # unary ops nest just fine
999 or $prec == $cx and $cx != 4 and $cx != 16 and $cx != 21
1000 or $self->{'parens'})
1001 {
1002 $text = "($text)";
1003 # In a unop, let parent reuse our parens; see maybe_parens_unop
1004 $text = "\cS" . $text if $cx == 16;
1005 return $text;
1006 } else {
1007 return $text;
1008 }
1009}
1010
1011# same as above, but get around the `if it looks like a function' rule
1012sub maybe_parens_unop {
1013 my $self = shift;
1014 my($name, $kid, $cx) = @_;
1015 if ($cx > 16 or $self->{'parens'}) {
a0035eb8
RH
1016 $kid = $self->deparse($kid, 1);
1017 if ($name eq "umask" && $kid =~ /^\d+$/) {
1018 $kid = sprintf("%#o", $kid);
1019 }
1020 return "$name($kid)";
9d2c6865
SM
1021 } else {
1022 $kid = $self->deparse($kid, 16);
a0035eb8
RH
1023 if ($name eq "umask" && $kid =~ /^\d+$/) {
1024 $kid = sprintf("%#o", $kid);
1025 }
9d2c6865
SM
1026 if (substr($kid, 0, 1) eq "\cS") {
1027 # use kid's parens
1028 return $name . substr($kid, 1);
1029 } elsif (substr($kid, 0, 1) eq "(") {
1030 # avoid looks-like-a-function trap with extra parens
1031 # (`+' can lead to ambiguities)
1032 return "$name(" . $kid . ")";
1033 } else {
1034 return "$name $kid";
1035 }
1036 }
1037}
1038
1039sub maybe_parens_func {
1040 my $self = shift;
1041 my($func, $text, $cx, $prec) = @_;
1042 if ($prec <= $cx or substr($text, 0, 1) eq "(" or $self->{'parens'}) {
1043 return "$func($text)";
1044 } else {
1045 return "$func $text";
1046 }
1047}
1048
6e90668e
SM
1049sub maybe_local {
1050 my $self = shift;
9d2c6865 1051 my($op, $cx, $text) = @_;
ce4e655d
RH
1052 my $our_intro = ($op->name =~ /^(gv|rv2)[ash]v$/) ? OPpOUR_INTRO : 0;
1053 if ($op->private & (OPpLVAL_INTRO|$our_intro)
1054 and not $self->{'avoid_local'}{$$op}) {
1055 my $our_local = ($op->private & OPpLVAL_INTRO) ? "local" : "our";
8e3542b6 1056 if( $our_local eq 'our' ) {
640d5d41
FC
1057 if ( $text !~ /^\W(\w+::)*\w+\z/
1058 and !utf8::decode($text) || $text !~ /^\W(\w+::)*\w+\z/
1059 ) {
1060 die "Unexpected our($text)\n";
1061 }
d989cdac 1062 $text =~ s/(\w+::)+//;
8e3542b6 1063 }
e8d3f51b 1064 if (want_scalar($op)) {
ce4e655d 1065 return "$our_local $text";
e8d3f51b 1066 } else {
ce4e655d 1067 return $self->maybe_parens_func("$our_local", $text, $cx, 16);
e8d3f51b 1068 }
6e90668e
SM
1069 } else {
1070 return $text;
a798dbf2 1071 }
a798dbf2
MB
1072}
1073
3ed82cfc
GS
1074sub maybe_targmy {
1075 my $self = shift;
1076 my($op, $cx, $func, @args) = @_;
1077 if ($op->private & OPpTARGET_MY) {
1078 my $var = $self->padname($op->targ);
1079 my $val = $func->($self, $op, 7, @args);
1080 return $self->maybe_parens("$var = $val", $cx, 7);
1081 } else {
1082 return $func->($self, $op, $cx, @args);
1083 }
1084}
1085
6e90668e
SM
1086sub padname_sv {
1087 my $self = shift;
1088 my $targ = shift;
d989cdac 1089 return $self->{'curcv'}->PADLIST->ARRAYelt(0)->ARRAYelt($targ);
6e90668e
SM
1090}
1091
1092sub maybe_my {
1093 my $self = shift;
9d2c6865 1094 my($op, $cx, $text) = @_;
4c1f658f 1095 if ($op->private & OPpLVAL_INTRO and not $self->{'avoid_local'}{$$op}) {
3462b4ac 1096 my $my = $op->private & OPpPAD_STATE ? "state" : "my";
e8d3f51b 1097 if (want_scalar($op)) {
3462b4ac 1098 return "$my $text";
e8d3f51b 1099 } else {
3462b4ac 1100 return $self->maybe_parens_func($my, $text, $cx, 16);
e8d3f51b 1101 }
6e90668e
SM
1102 } else {
1103 return $text;
1104 }
1105}
1106
9d2c6865
SM
1107# The following OPs don't have functions:
1108
1109# pp_padany -- does not exist after parsing
9d2c6865 1110
2ae48fff
RGS
1111sub AUTOLOAD {
1112 if ($AUTOLOAD =~ s/^.*::pp_//) {
1113 warn "unexpected OP_".uc $AUTOLOAD;
1114 return "XXX";
1115 } else {
1116 die "Undefined subroutine $AUTOLOAD called";
1117 }
9d2c6865 1118}
6e90668e 1119
611c1e95
IZ
1120sub DESTROY {} # Do not AUTOLOAD
1121
ce4e655d
RH
1122# $root should be the op which represents the root of whatever
1123# we're sequencing here. If it's undefined, then we don't append
1124# any subroutine declarations to the deparsed ops, otherwise we
1125# append appropriate declarations.
58cccf98 1126sub lineseq {
ce4e655d 1127 my($self, $root, @ops) = @_;
58cccf98 1128 my($expr, @exprs);
ce4e655d
RH
1129
1130 my $out_cop = $self->{'curcop'};
1131 my $out_seq = defined($out_cop) ? $out_cop->cop_seq : undef;
1132 my $limit_seq;
1133 if (defined $root) {
1134 $limit_seq = $out_seq;
76df5e8f
DM
1135 my $nseq;
1136 $nseq = $self->find_scope_st($root->sibling) if ${$root->sibling};
ce4e655d
RH
1137 $limit_seq = $nseq if !defined($limit_seq)
1138 or defined($nseq) && $nseq < $limit_seq;
1139 }
1140 $limit_seq = $self->{'limit_seq'}
1141 if defined($self->{'limit_seq'})
1142 && (!defined($limit_seq) || $self->{'limit_seq'} < $limit_seq);
1143 local $self->{'limit_seq'} = $limit_seq;
09d856fb
CK
1144
1145 $self->walk_lineseq($root, \@ops,
1146 sub { push @exprs, $_[0]} );
1147
ce4e655d
RH
1148 my $body = join(";\n", grep {length} @exprs);
1149 my $subs = "";
67fc2416 1150 if (defined $root && defined $limit_seq && !$self->{'in_format'}) {
ce4e655d
RH
1151 $subs = join "\n", $self->seq_subs($limit_seq);
1152 }
1153 return join(";\n", grep {length} $body, $subs);
6e90668e
SM
1154}
1155
58cccf98 1156sub scopeop {
d989cdac 1157 my($real_block, $self, $op, $cx) = @_;
58cccf98
SM
1158 my $kid;
1159 my @kids;
a0405c92 1160
0ced6c29
RGS
1161 local(@$self{qw'curstash warnings hints hinthash'})
1162 = @$self{qw'curstash warnings hints hinthash'} if $real_block;
58cccf98
SM
1163 if ($real_block) {
1164 $kid = $op->first->sibling; # skip enter
1165 if (is_miniwhile($kid)) {
1166 my $top = $kid->first;
1167 my $name = $top->name;
1168 if ($name eq "and") {
1169 $name = "while";
1170 } elsif ($name eq "or") {
1171 $name = "until";
1172 } else { # no conditional -> while 1 or until 0
1173 return $self->deparse($top->first, 1) . " while 1";
1174 }
1175 my $cond = $top->first;
1176 my $body = $cond->sibling->first; # skip lineseq
1177 $cond = $self->deparse($cond, 1);
1178 $body = $self->deparse($body, 1);
1179 return "$body $name $cond";
6e90668e 1180 }
58cccf98
SM
1181 } else {
1182 $kid = $op->first;
1183 }
1184 for (; !null($kid); $kid = $kid->sibling) {
1185 push @kids, $kid;
6e90668e 1186 }
d989cdac 1187 if ($cx > 0) { # inside an expression, (a do {} while for lineseq)
ce4e655d 1188 return "do {\n\t" . $self->lineseq($op, @kids) . "\n\b}";
9d2c6865 1189 } else {
ce4e655d 1190 my $lineseq = $self->lineseq($op, @kids);
7a9b44b9 1191 return (length ($lineseq) ? "$lineseq;" : "");
6e90668e 1192 }
6e90668e
SM
1193}
1194
ce4e655d 1195sub pp_scope { scopeop(0, @_); }
58cccf98
SM
1196sub pp_lineseq { scopeop(0, @_); }
1197sub pp_leave { scopeop(1, @_); }
9d2c6865 1198
d989cdac
SM
1199# This is a special case of scopeop and lineseq, for the case of the
1200# main_root. The difference is that we print the output statements as
1201# soon as we get them, for the sake of impatient users.
1202sub deparse_root {
1203 my $self = shift;
1204 my($op) = @_;
0ced6c29
RGS
1205 local(@$self{qw'curstash warnings hints hinthash'})
1206 = @$self{qw'curstash warnings hints hinthash'};
d989cdac 1207 my @kids;
4ca8de37 1208 return if null $op->first; # Can happen, e.g., for Bytecode without -k
d989cdac
SM
1209 for (my $kid = $op->first->sibling; !null($kid); $kid = $kid->sibling) {
1210 push @kids, $kid;
1211 }
09d856fb
CK
1212 $self->walk_lineseq($op, \@kids,
1213 sub { print $self->indent($_[0].';');
1214 print "\n" unless $_[1] == $#kids;
1215 });
1216}
1217
1218sub walk_lineseq {
1219 my ($self, $op, $kids, $callback) = @_;
1220 my @kids = @$kids;
d989cdac
SM
1221 for (my $i = 0; $i < @kids; $i++) {
1222 my $expr = "";
1223 if (is_state $kids[$i]) {
09d856fb 1224 $expr = $self->deparse($kids[$i++], 0);
d989cdac 1225 if ($i > $#kids) {
09d856fb 1226 $callback->($expr, $i);
d989cdac
SM
1227 last;
1228 }
1229 }
1230 if (is_for_loop($kids[$i])) {
eae48c89
Z
1231 $callback->($expr . $self->for_loop($kids[$i], 0),
1232 $i += $kids[$i]->sibling->name eq "unstack" ? 2 : 1);
d989cdac
SM
1233 next;
1234 }
1235 $expr .= $self->deparse($kids[$i], (@kids != 1)/2);
1236 $expr =~ s/;\n?\z//;
09d856fb 1237 $callback->($expr, $i);
d989cdac
SM
1238 }
1239}
1240
6e90668e
SM
1241# The BEGIN {} is used here because otherwise this code isn't executed
1242# when you run B::Deparse on itself.
1243my %globalnames;
1244BEGIN { map($globalnames{$_}++, "SIG", "STDIN", "STDOUT", "STDERR", "INC",
1245 "ENV", "ARGV", "ARGVOUT", "_"); }
1246
1247sub gv_name {
1248 my $self = shift;
1249 my $gv = shift;
c6e79e55 1250Carp::confess() unless ref($gv) eq "B::GV";
6e90668e 1251 my $stash = $gv->STASH->NAME;
d9963e60 1252 my $name = $gv->SAFENAME;
8b2d6640
FC
1253 if ($stash eq 'main' && $name =~ /^::/) {
1254 $stash = '::';
1255 }
1256 elsif (($stash eq 'main' && $globalnames{$name})
1257 or ($stash eq $self->{'curstash'} && !$globalnames{$name}
1258 && ($stash eq 'main' || $name !~ /::/))
644838b9 1259 or $name =~ /^[^A-Za-z_:]/)
9d2c6865 1260 {
6e90668e
SM
1261 $stash = "";
1262 } else {
1263 $stash = $stash . "::";
a798dbf2 1264 }
083bda02
MS
1265 if ($name =~ /^(\^..|{)/) {
1266 $name = "{$name}"; # ${^WARNING_BITS}, etc and ${
6e90668e
SM
1267 }
1268 return $stash . $name;
a798dbf2
MB
1269}
1270
8510e997
RH
1271# Return the name to use for a stash variable.
1272# If a lexical with the same name is in scope, it may need to be
1273# fully-qualified.
1274sub stash_variable {
1275 my ($self, $prefix, $name) = @_;
1276
1277 return "$prefix$name" if $name =~ /::/;
1278
d989cdac 1279 unless ($prefix eq '$' || $prefix eq '@' || #'
8510e997
RH
1280 $prefix eq '%' || $prefix eq '$#') {
1281 return "$prefix$name";
1282 }
1283
1284 my $v = ($prefix eq '$#' ? '@' : $prefix) . $name;
1285 return $prefix .$self->{'curstash'}.'::'. $name if $self->lex_in_scope($v);
1286 return "$prefix$name";
1287}
1288
1289sub lex_in_scope {
1290 my ($self, $name) = @_;
1291 $self->populate_curcvlex() if !defined $self->{'curcvlex'};
1292
6ec152c3 1293 return 0 if !defined($self->{'curcop'});
8510e997
RH
1294 my $seq = $self->{'curcop'}->cop_seq;
1295 return 0 if !exists $self->{'curcvlex'}{$name};
1296 for my $a (@{$self->{'curcvlex'}{$name}}) {
1297 my ($st, $en) = @$a;
1298 return 1 if $seq > $st && $seq <= $en;
1299 }
1300 return 0;
1301}
1302
1303sub populate_curcvlex {
1304 my $self = shift;
ce4e655d 1305 for (my $cv = $self->{'curcv'}; class($cv) eq "CV"; $cv = $cv->OUTSIDE) {
7dafbf52
DM
1306 my $padlist = $cv->PADLIST;
1307 # an undef CV still in lexical chain
1308 next if class($padlist) eq "SPECIAL";
1309 my @padlist = $padlist->ARRAY;
8510e997
RH
1310 my @ns = $padlist[0]->ARRAY;
1311
1312 for (my $i=0; $i<@ns; ++$i) {
1313 next if class($ns[$i]) eq "SPECIAL";
ce4e655d 1314 next if $ns[$i]->FLAGS & SVpad_OUR; # Skip "our" vars
0f2fe21d
RH
1315 if (class($ns[$i]) eq "PV") {
1316 # Probably that pesky lexical @_
1317 next;
1318 }
8510e997 1319 my $name = $ns[$i]->PVX;
7dafbf52
DM
1320 my ($seq_st, $seq_en) =
1321 ($ns[$i]->FLAGS & SVf_FAKE)
1322 ? (0, 999999)
809abb02 1323 : ($ns[$i]->COP_SEQ_RANGE_LOW, $ns[$i]->COP_SEQ_RANGE_HIGH);
8510e997
RH
1324
1325 push @{$self->{'curcvlex'}{$name}}, [$seq_st, $seq_en];
1326 }
1327 }
1328}
1329
ce4e655d
RH
1330sub find_scope_st { ((find_scope(@_))[0]); }
1331sub find_scope_en { ((find_scope(@_))[1]); }
1332
1333# Recurses down the tree, looking for pad variable introductions and COPs
1334sub find_scope {
1335 my ($self, $op, $scope_st, $scope_en) = @_;
ff97752d 1336 carp("Undefined op in find_scope") if !defined $op;
ce4e655d
RH
1337 return ($scope_st, $scope_en) unless $op->flags & OPf_KIDS;
1338
b6b46d6f
AB
1339 my @queue = ($op);
1340 while(my $op = shift @queue ) {
1341 for (my $o=$op->first; $$o; $o=$o->sibling) {
1342 if ($o->name =~ /^pad.v$/ && $o->private & OPpLVAL_INTRO) {
1343 my $s = int($self->padname_sv($o->targ)->COP_SEQ_RANGE_LOW);
1344 my $e = $self->padname_sv($o->targ)->COP_SEQ_RANGE_HIGH;
1345 $scope_st = $s if !defined($scope_st) || $s < $scope_st;
1346 $scope_en = $e if !defined($scope_en) || $e > $scope_en;
1347 return ($scope_st, $scope_en);
1348 }
1349 elsif (is_state($o)) {
1350 my $c = $o->cop_seq;
1351 $scope_st = $c if !defined($scope_st) || $c < $scope_st;
1352 $scope_en = $c if !defined($scope_en) || $c > $scope_en;
1353 return ($scope_st, $scope_en);
1354 }
1355 elsif ($o->flags & OPf_KIDS) {
1356 unshift (@queue, $o);
1357 }
34a48b4b
RH
1358 }
1359 }
ce4e655d
RH
1360
1361 return ($scope_st, $scope_en);
34a48b4b
RH
1362}
1363
1364# Returns a list of subs which should be inserted before the COP
1365sub cop_subs {
1366 my ($self, $op, $out_seq) = @_;
1367 my $seq = $op->cop_seq;
1368 # If we have nephews, then our sequence number indicates
1369 # the cop_seq of the end of some sort of scope.
1370 if (class($op->sibling) ne "NULL" && $op->sibling->flags & OPf_KIDS
ce4e655d
RH
1371 and my $nseq = $self->find_scope_st($op->sibling) ) {
1372 $seq = $nseq;
34a48b4b
RH
1373 }
1374 $seq = $out_seq if defined($out_seq) && $out_seq < $seq;
1375 return $self->seq_subs($seq);
1376}
1377
1378sub seq_subs {
1379 my ($self, $seq) = @_;
1380 my @text;
1381#push @text, "# ($seq)\n";
1382
ce4e655d 1383 return "" if !defined $seq;
34a48b4b
RH
1384 while (scalar(@{$self->{'subs_todo'}})
1385 and $seq > $self->{'subs_todo'}[0][0]) {
1386 push @text, $self->next_todo;
1387 }
1388 return @text;
1389}
1390
08c6f5ec 1391# Notice how subs and formats are inserted between statements here;
a0405c92 1392# also $[ assignments and pragmas.
6e90668e
SM
1393sub pp_nextstate {
1394 my $self = shift;
9d2c6865 1395 my($op, $cx) = @_;
34a48b4b 1396 $self->{'curcop'} = $op;
6e90668e 1397 my @text;
34a48b4b 1398 push @text, $self->cop_subs($op);
11faa288 1399 my $stash = $op->stashpv;
6e90668e
SM
1400 if ($stash ne $self->{'curstash'}) {
1401 push @text, "package $stash;\n";
1402 $self->{'curstash'} = $stash;
1403 }
08c6f5ec 1404
7a9b44b9
RH
1405 if ($self->{'arybase'} != $op->arybase) {
1406 push @text, '$[ = '. $op->arybase .";\n";
1407 $self->{'arybase'} = $op->arybase;
1408 }
1409
1410 my $warnings = $op->warnings;
1411 my $warning_bits;
1412 if ($warnings->isa("B::SPECIAL") && $$warnings == 4) {
810aef70 1413 $warning_bits = $warnings::Bits{"all"} & WARN_MASK;
7a9b44b9 1414 }
e31885a0 1415 elsif ($warnings->isa("B::SPECIAL") && $$warnings == 5) {
810aef70 1416 $warning_bits = $warnings::NONE;
7a9b44b9 1417 }
e31885a0
RH
1418 elsif ($warnings->isa("B::SPECIAL")) {
1419 $warning_bits = undef;
1420 }
7a9b44b9 1421 else {
34a48b4b 1422 $warning_bits = $warnings->PV & WARN_MASK;
7a9b44b9
RH
1423 }
1424
e31885a0
RH
1425 if (defined ($warning_bits) and
1426 !defined($self->{warnings}) || $self->{'warnings'} ne $warning_bits) {
08c6f5ec 1427 push @text, declare_warnings($self->{'warnings'}, $warning_bits);
7a9b44b9
RH
1428 $self->{'warnings'} = $warning_bits;
1429 }
1430
2be95ceb
NC
1431 my $hints = $] < 5.008009 ? $op->private : $op->hints;
1432 if ($self->{'hints'} != $hints) {
1433 push @text, declare_hints($self->{'hints'}, $hints);
1434 $self->{'hints'} = $hints;
a0405c92
RH
1435 }
1436
0ced6c29 1437 # hack to check that the hint hash hasn't changed
e9c69003
NC
1438 if ($] > 5.009 &&
1439 "@{[sort %{$self->{'hinthash'} || {}}]}"
1440 ne "@{[sort %{$op->hints_hash->HASH || {}}]}") {
0ced6c29
RGS
1441 push @text, declare_hinthash($self->{'hinthash'}, $op->hints_hash->HASH, $self->{indent_size});
1442 $self->{'hinthash'} = $op->hints_hash->HASH;
1443 }
1444
d989cdac
SM
1445 # This should go after of any branches that add statements, to
1446 # increase the chances that it refers to the same line it did in
1447 # the original program.
1448 if ($self->{'linenums'}) {
1449 push @text, "\f#line " . $op->line .
1450 ' "' . $op->file, qq'"\n';
1451 }
1452
98a1a137
Z
1453 push @text, $op->label . ": " if $op->label;
1454
6e90668e
SM
1455 return join("", @text);
1456}
1457
08c6f5ec
RH
1458sub declare_warnings {
1459 my ($from, $to) = @_;
e6f1f756 1460 if (($to & WARN_MASK) eq (warnings::bits("all") & WARN_MASK)) {
a0405c92
RH
1461 return "use warnings;\n";
1462 }
e6f1f756 1463 elsif (($to & WARN_MASK) eq ("\0"x length($to) & WARN_MASK)) {
a0405c92
RH
1464 return "no warnings;\n";
1465 }
51a5edaf 1466 return "BEGIN {\${^WARNING_BITS} = ".perlstring($to)."}\n";
a0405c92
RH
1467}
1468
1469sub declare_hints {
1470 my ($from, $to) = @_;
a0035eb8
RH
1471 my $use = $to & ~$from;
1472 my $no = $from & ~$to;
1473 my $decls = "";
1474 for my $pragma (hint_pragmas($use)) {
1475 $decls .= "use $pragma;\n";
1476 }
1477 for my $pragma (hint_pragmas($no)) {
1478 $decls .= "no $pragma;\n";
1479 }
1480 return $decls;
1481}
1482
493c23c6
NC
1483# Internal implementation hints that the core sets automatically, so don't need
1484# (or want) to be passed back to the user
1485my %ignored_hints = (
1486 'open<' => 1,
1487 'open>' => 1,
dca6062a 1488 ':' => 1,
2e8342de 1489);
493c23c6 1490
0ced6c29
RGS
1491sub declare_hinthash {
1492 my ($from, $to, $indent) = @_;
1493 my @decls;
1494 for my $key (keys %$to) {
493c23c6 1495 next if $ignored_hints{$key};
0ced6c29
RGS
1496 if (!defined $from->{$key} or $from->{$key} ne $to->{$key}) {
1497 push @decls, qq(\$^H{'$key'} = q($to->{$key}););
1498 }
1499 }
1500 for my $key (keys %$from) {
493c23c6 1501 next if $ignored_hints{$key};
0ced6c29
RGS
1502 if (!exists $to->{$key}) {
1503 push @decls, qq(delete \$^H{'$key'};);
1504 }
1505 }
1506 @decls or return '';
1507 return join("\n" . (" " x $indent), "BEGIN {", @decls) . "\n}\n";
1508}
1509
a0035eb8
RH
1510sub hint_pragmas {
1511 my ($bits) = @_;
1512 my @pragmas;
1513 push @pragmas, "integer" if $bits & 0x1;
1514 push @pragmas, "strict 'refs'" if $bits & 0x2;
1515 push @pragmas, "bytes" if $bits & 0x8;
1516 return @pragmas;
08c6f5ec
RH
1517}
1518
6e90668e 1519sub pp_dbstate { pp_nextstate(@_) }
3f872cb9 1520sub pp_setstate { pp_nextstate(@_) }
6e90668e
SM
1521
1522sub pp_unstack { return "" } # see also leaveloop
1523
1524sub baseop {
1525 my $self = shift;
9d2c6865 1526 my($op, $cx, $name) = @_;
6e90668e
SM
1527 return $name;
1528}
1529
e99ebc55
RH
1530sub pp_stub {
1531 my $self = shift;
1532 my($op, $cx, $name) = @_;
d989cdac 1533 if ($cx >= 1) {
e99ebc55
RH
1534 return "()";
1535 }
1536 else {
1537 return "();";
1538 }
1539}
6e90668e
SM
1540sub pp_wantarray { baseop(@_, "wantarray") }
1541sub pp_fork { baseop(@_, "fork") }
3ed82cfc
GS
1542sub pp_wait { maybe_targmy(@_, \&baseop, "wait") }
1543sub pp_getppid { maybe_targmy(@_, \&baseop, "getppid") }
1544sub pp_time { maybe_targmy(@_, \&baseop, "time") }
6e90668e
SM
1545sub pp_tms { baseop(@_, "times") }
1546sub pp_ghostent { baseop(@_, "gethostent") }
1547sub pp_gnetent { baseop(@_, "getnetent") }
1548sub pp_gprotoent { baseop(@_, "getprotoent") }
1549sub pp_gservent { baseop(@_, "getservent") }
1550sub pp_ehostent { baseop(@_, "endhostent") }
1551sub pp_enetent { baseop(@_, "endnetent") }
1552sub pp_eprotoent { baseop(@_, "endprotoent") }
1553sub pp_eservent { baseop(@_, "endservent") }
1554sub pp_gpwent { baseop(@_, "getpwent") }
1555sub pp_spwent { baseop(@_, "setpwent") }
1556sub pp_epwent { baseop(@_, "endpwent") }
1557sub pp_ggrent { baseop(@_, "getgrent") }
1558sub pp_sgrent { baseop(@_, "setgrent") }
1559sub pp_egrent { baseop(@_, "endgrent") }
1560sub pp_getlogin { baseop(@_, "getlogin") }
1561
1562sub POSTFIX () { 1 }
1563
9d2c6865
SM
1564# I couldn't think of a good short name, but this is the category of
1565# symbolic unary operators with interesting precedence
1566
1567sub pfixop {
1568 my $self = shift;
1569 my($op, $cx, $name, $prec, $flags) = (@_, 0);
1570 my $kid = $op->first;
1571 $kid = $self->deparse($kid, $prec);
1572 return $self->maybe_parens(($flags & POSTFIX) ? "$kid$name" : "$name$kid",
1573 $cx, $prec);
1574}
1575
1576sub pp_preinc { pfixop(@_, "++", 23) }
1577sub pp_predec { pfixop(@_, "--", 23) }
3ed82cfc
GS
1578sub pp_postinc { maybe_targmy(@_, \&pfixop, "++", 23, POSTFIX) }
1579sub pp_postdec { maybe_targmy(@_, \&pfixop, "--", 23, POSTFIX) }
9d2c6865
SM
1580sub pp_i_preinc { pfixop(@_, "++", 23) }
1581sub pp_i_predec { pfixop(@_, "--", 23) }
3ed82cfc
GS
1582sub pp_i_postinc { maybe_targmy(@_, \&pfixop, "++", 23, POSTFIX) }
1583sub pp_i_postdec { maybe_targmy(@_, \&pfixop, "--", 23, POSTFIX) }
68cc8748 1584sub pp_complement { maybe_targmy(@_, \&pfixop, "~", 21) }
9d2c6865 1585
3ed82cfc
GS
1586sub pp_negate { maybe_targmy(@_, \&real_negate) }
1587sub real_negate {
9d2c6865
SM
1588 my $self = shift;
1589 my($op, $cx) = @_;
3f872cb9 1590 if ($op->first->name =~ /^(i_)?negate$/) {
9d2c6865
SM
1591 # avoid --$x
1592 $self->pfixop($op, $cx, "-", 21.5);
1593 } else {
1594 $self->pfixop($op, $cx, "-", 21);
1595 }
1596}
1597sub pp_i_negate { pp_negate(@_) }
1598
1599sub pp_not {
1600 my $self = shift;
1601 my($op, $cx) = @_;
1602 if ($cx <= 4) {
1603 $self->pfixop($op, $cx, "not ", 4);
1604 } else {
1605 $self->pfixop($op, $cx, "!", 21);
1606 }
1607}
1608
6e90668e
SM
1609sub unop {
1610 my $self = shift;
f4a44678 1611 my($op, $cx, $name) = @_;
6e90668e 1612 my $kid;
9d2c6865 1613 if ($op->flags & OPf_KIDS) {
aaf643ce 1614 $kid = $op->first;
1c85afce
YO
1615 if (not $name) {
1616 # this deals with 'boolkeys' right now
1617 return $self->deparse($kid,$cx);
1618 }
deb20ba3
RGS
1619 my $builtinname = $name;
1620 $builtinname =~ /^CORE::/ or $builtinname = "CORE::$name";
1621 if (defined prototype($builtinname)
1622 && prototype($builtinname) =~ /^;?\*/
e31885a0
RH
1623 && $kid->name eq "rv2gv") {
1624 $kid = $kid->first;
1625 }
1626
9d2c6865 1627 return $self->maybe_parens_unop($name, $kid, $cx);
6e90668e 1628 } else {
d989cdac 1629 return $name . ($op->flags & OPf_SPECIAL ? "()" : "");
6e90668e 1630 }
6e90668e
SM
1631}
1632
3ed82cfc
GS
1633sub pp_chop { maybe_targmy(@_, \&unop, "chop") }
1634sub pp_chomp { maybe_targmy(@_, \&unop, "chomp") }
1635sub pp_schop { maybe_targmy(@_, \&unop, "chop") }
1636sub pp_schomp { maybe_targmy(@_, \&unop, "chomp") }
6e90668e
SM
1637sub pp_defined { unop(@_, "defined") }
1638sub pp_undef { unop(@_, "undef") }
1639sub pp_study { unop(@_, "study") }
6e90668e
SM
1640sub pp_ref { unop(@_, "ref") }
1641sub pp_pos { maybe_local(@_, unop(@_, "pos")) }
1642
3ed82cfc
GS
1643sub pp_sin { maybe_targmy(@_, \&unop, "sin") }
1644sub pp_cos { maybe_targmy(@_, \&unop, "cos") }
1645sub pp_rand { maybe_targmy(@_, \&unop, "rand") }
6e90668e 1646sub pp_srand { unop(@_, "srand") }
3ed82cfc
GS
1647sub pp_exp { maybe_targmy(@_, \&unop, "exp") }
1648sub pp_log { maybe_targmy(@_, \&unop, "log") }
1649sub pp_sqrt { maybe_targmy(@_, \&unop, "sqrt") }
1650sub pp_int { maybe_targmy(@_, \&unop, "int") }
1651sub pp_hex { maybe_targmy(@_, \&unop, "hex") }
1652sub pp_oct { maybe_targmy(@_, \&unop, "oct") }
1653sub pp_abs { maybe_targmy(@_, \&unop, "abs") }
1654
1655sub pp_length { maybe_targmy(@_, \&unop, "length") }
1656sub pp_ord { maybe_targmy(@_, \&unop, "ord") }
1657sub pp_chr { maybe_targmy(@_, \&unop, "chr") }
6e90668e
SM
1658
1659sub pp_each { unop(@_, "each") }
1660sub pp_values { unop(@_, "values") }
1661sub pp_keys { unop(@_, "keys") }
1c85afce
YO
1662sub pp_boolkeys {
1663 # no name because its an optimisation op that has no keyword
1664 unop(@_,"");
1665}
644741fd
NC
1666sub pp_aeach { unop(@_, "each") }
1667sub pp_avalues { unop(@_, "values") }
1668sub pp_akeys { unop(@_, "keys") }
6e90668e
SM
1669sub pp_pop { unop(@_, "pop") }
1670sub pp_shift { unop(@_, "shift") }
1671
1672sub pp_caller { unop(@_, "caller") }
1673sub pp_reset { unop(@_, "reset") }
1674sub pp_exit { unop(@_, "exit") }
1675sub pp_prototype { unop(@_, "prototype") }
1676
1677sub pp_close { unop(@_, "close") }
1678sub pp_fileno { unop(@_, "fileno") }
1679sub pp_umask { unop(@_, "umask") }
6e90668e
SM
1680sub pp_untie { unop(@_, "untie") }
1681sub pp_tied { unop(@_, "tied") }
1682sub pp_dbmclose { unop(@_, "dbmclose") }
1683sub pp_getc { unop(@_, "getc") }
1684sub pp_eof { unop(@_, "eof") }
1685sub pp_tell { unop(@_, "tell") }
1686sub pp_getsockname { unop(@_, "getsockname") }
1687sub pp_getpeername { unop(@_, "getpeername") }
1688
3ed82cfc
GS
1689sub pp_chdir { maybe_targmy(@_, \&unop, "chdir") }
1690sub pp_chroot { maybe_targmy(@_, \&unop, "chroot") }
6e90668e 1691sub pp_readlink { unop(@_, "readlink") }
3ed82cfc 1692sub pp_rmdir { maybe_targmy(@_, \&unop, "rmdir") }
6e90668e
SM
1693sub pp_readdir { unop(@_, "readdir") }
1694sub pp_telldir { unop(@_, "telldir") }
1695sub pp_rewinddir { unop(@_, "rewinddir") }
1696sub pp_closedir { unop(@_, "closedir") }
3ed82cfc 1697sub pp_getpgrp { maybe_targmy(@_, \&unop, "getpgrp") }
6e90668e
SM
1698sub pp_localtime { unop(@_, "localtime") }
1699sub pp_gmtime { unop(@_, "gmtime") }
1700sub pp_alarm { unop(@_, "alarm") }
3ed82cfc 1701sub pp_sleep { maybe_targmy(@_, \&unop, "sleep") }
6e90668e
SM
1702
1703sub pp_dofile { unop(@_, "do") }
1704sub pp_entereval { unop(@_, "eval") }
1705
1706sub pp_ghbyname { unop(@_, "gethostbyname") }
1707sub pp_gnbyname { unop(@_, "getnetbyname") }
1708sub pp_gpbyname { unop(@_, "getprotobyname") }
1709sub pp_shostent { unop(@_, "sethostent") }
1710sub pp_snetent { unop(@_, "setnetent") }
1711sub pp_sprotoent { unop(@_, "setprotoent") }
1712sub pp_sservent { unop(@_, "setservent") }
1713sub pp_gpwnam { unop(@_, "getpwnam") }
1714sub pp_gpwuid { unop(@_, "getpwuid") }
1715sub pp_ggrnam { unop(@_, "getgrnam") }
1716sub pp_ggrgid { unop(@_, "getgrgid") }
1717
1718sub pp_lock { unop(@_, "lock") }
1719
0d863452
RH
1720sub pp_continue { unop(@_, "continue"); }
1721sub pp_break {
1722 my ($self, $op) = @_;
1723 return "" if $op->flags & OPf_SPECIAL;
1724 unop(@_, "break");
1725}
1726
1727sub givwhen {
1728 my $self = shift;
1729 my($op, $cx, $givwhen) = @_;
1730
1731 my $enterop = $op->first;
1732 my ($head, $block);
1733 if ($enterop->flags & OPf_SPECIAL) {
1734 $head = "default";
1735 $block = $self->deparse($enterop->first, 0);
1736 }
1737 else {
1738 my $cond = $enterop->first;
1739 my $cond_str = $self->deparse($cond, 1);
1740 $head = "$givwhen ($cond_str)";
1741 $block = $self->deparse($cond->sibling, 0);
1742 }
1743
1744 return "$head {\n".
1745 "\t$block\n".
1746 "\b}\cK";
1747}
1748
1749sub pp_leavegiven { givwhen(@_, "given"); }
1750sub pp_leavewhen { givwhen(@_, "when"); }
1751
6e90668e
SM
1752sub pp_exists {
1753 my $self = shift;
9d2c6865 1754 my($op, $cx) = @_;
34a48b4b
RH
1755 my $arg;
1756 if ($op->private & OPpEXISTS_SUB) {
1757 # Checking for the existence of a subroutine
1758 return $self->maybe_parens_func("exists",
1759 $self->pp_rv2cv($op->first, 16), $cx, 16);
1760 }
1761 if ($op->flags & OPf_SPECIAL) {
1762 # Array element, not hash element
1763 return $self->maybe_parens_func("exists",
1764 $self->pp_aelem($op->first, 16), $cx, 16);
1765 }
9d2c6865
SM
1766 return $self->maybe_parens_func("exists", $self->pp_helem($op->first, 16),
1767 $cx, 16);
6e90668e
SM
1768}
1769
6e90668e
SM
1770sub pp_delete {
1771 my $self = shift;
9d2c6865 1772 my($op, $cx) = @_;
6e90668e
SM
1773 my $arg;
1774 if ($op->private & OPpSLICE) {
34a48b4b
RH
1775 if ($op->flags & OPf_SPECIAL) {
1776 # Deleting from an array, not a hash
1777 return $self->maybe_parens_func("delete",
1778 $self->pp_aslice($op->first, 16),
1779 $cx, 16);
1780 }
9d2c6865
SM
1781 return $self->maybe_parens_func("delete",
1782 $self->pp_hslice($op->first, 16),
1783 $cx, 16);
6e90668e 1784 } else {
34a48b4b
RH
1785 if ($op->flags & OPf_SPECIAL) {
1786 # Deleting from an array, not a hash
1787 return $self->maybe_parens_func("delete",
1788 $self->pp_aelem($op->first, 16),
1789 $cx, 16);
1790 }
9d2c6865
SM
1791 return $self->maybe_parens_func("delete",
1792 $self->pp_helem($op->first, 16),
1793 $cx, 16);
6e90668e 1794 }
6e90668e
SM
1795}
1796
6e90668e
SM
1797sub pp_require {
1798 my $self = shift;
9d2c6865 1799 my($op, $cx) = @_;
d5889722 1800 my $opname = $op->flags & OPf_SPECIAL ? 'CORE::require' : 'require';
3f872cb9 1801 if (class($op) eq "UNOP" and $op->first->name eq "const"
4c1f658f 1802 and $op->first->private & OPpCONST_BARE)
6e90668e 1803 {
18228111 1804 my $name = $self->const_sv($op->first)->PV;
6e90668e
SM
1805 $name =~ s[/][::]g;
1806 $name =~ s/\.pm//g;
d5889722 1807 return "$opname $name";
6e90668e 1808 } else {
30fcd6c4 1809 $self->unop($op, $cx, $op->first->private & OPpCONST_NOVER ? "no" : $opname);
6e90668e
SM
1810 }
1811}
1812
d989cdac 1813sub pp_scalar {
9d2c6865 1814 my $self = shift;
d9002312 1815 my($op, $cx) = @_;
9d2c6865
SM
1816 my $kid = $op->first;
1817 if (not null $kid->sibling) {
1818 # XXX Was a here-doc
1819 return $self->dquote($op);
1820 }
1821 $self->unop(@_, "scalar");
1822}
1823
1824
6e90668e
SM
1825sub padval {
1826 my $self = shift;
1827 my $targ = shift;
d989cdac 1828 return $self->{'curcv'}->PADLIST->ARRAYelt(1)->ARRAYelt($targ);
6e90668e
SM
1829}
1830
78c72037
NC
1831sub anon_hash_or_list {
1832 my $self = shift;
d9002312 1833 my($op, $cx) = @_;
78c72037
NC
1834
1835 my($pre, $post) = @{{"anonlist" => ["[","]"],
1836 "anonhash" => ["{","}"]}->{$op->name}};
1837 my($expr, @exprs);
1838 $op = $op->first->sibling; # skip pushmark
1839 for (; !null($op); $op = $op->sibling) {
1840 $expr = $self->deparse($op, 6);
1841 push @exprs, $expr;
1842 }
d9002312
SM
1843 if ($pre eq "{" and $cx < 1) {
1844 # Disambiguate that it's not a block
1845 $pre = "+{";
1846 }
78c72037
NC
1847 return $pre . join(", ", @exprs) . $post;
1848}
1849
1850sub pp_anonlist {
d9002312
SM
1851 my $self = shift;
1852 my ($op, $cx) = @_;
78c72037 1853 if ($op->flags & OPf_SPECIAL) {
d9002312 1854 return $self->anon_hash_or_list($op, $cx);
78c72037
NC
1855 }
1856 warn "Unexpected op pp_" . $op->name() . " without OPf_SPECIAL";
1857 return 'XXX';
1858}
1859
1860*pp_anonhash = \&pp_anonlist;
1861
6e90668e
SM
1862sub pp_refgen {
1863 my $self = shift;
9d2c6865 1864 my($op, $cx) = @_;
6e90668e 1865 my $kid = $op->first;
3f872cb9 1866 if ($kid->name eq "null") {
6e90668e 1867 $kid = $kid->first;
35925e80 1868 if (!null($kid->sibling) and
3f872cb9 1869 $kid->sibling->name eq "anoncode") {
09d856fb 1870 return $self->e_anoncode({ code => $self->padval($kid->sibling->targ) });
3f872cb9
GS
1871 } elsif ($kid->name eq "pushmark") {
1872 my $sib_name = $kid->sibling->name;
1873 if ($sib_name =~ /^(pad|rv2)[ah]v$/
c8c62db7
AD
1874 and not $kid->sibling->flags & OPf_REF)
1875 {
1876 # The @a in \(@a) isn't in ref context, but only when the
1877 # parens are there.
127212b2 1878 return "\\(" . $self->pp_list($op->first) . ")";
3f872cb9 1879 } elsif ($sib_name eq 'entersub') {
c8c62db7
AD
1880 my $text = $self->deparse($kid->sibling, 1);
1881 # Always show parens for \(&func()), but only with -p otherwise
1882 $text = "($text)" if $self->{'parens'}
1883 or $kid->sibling->private & OPpENTERSUB_AMPER;
1884 return "\\$text";
1885 }
1886 }
6e90668e 1887 }
9d2c6865 1888 $self->pfixop($op, $cx, "\\", 20);
6e90668e
SM
1889}
1890
09d856fb
CK
1891sub e_anoncode {
1892 my ($self, $info) = @_;
1893 my $text = $self->deparse_sub($info->{code});
1894 return "sub " . $text;
1895}
1896
6e90668e
SM
1897sub pp_srefgen { pp_refgen(@_) }
1898
1899sub pp_readline {
1900 my $self = shift;
9d2c6865 1901 my($op, $cx) = @_;
6e90668e 1902 my $kid = $op->first;
3f872cb9 1903 $kid = $kid->first if $kid->name eq "rv2gv"; # <$fh>
e31885a0
RH
1904 return "<" . $self->deparse($kid, 1) . ">" if is_scalar($kid);
1905 return $self->unop($op, $cx, "readline");
6e90668e
SM
1906}
1907
ad8caead
RGS
1908sub pp_rcatline {
1909 my $self = shift;
1910 my($op) = @_;
d989cdac 1911 return "<" . $self->gv_name($self->gv_or_padgv($op)) . ">";
ad8caead
RGS
1912}
1913
bd0865ec
GS
1914# Unary operators that can occur as pseudo-listops inside double quotes
1915sub dq_unop {
1916 my $self = shift;
1917 my($op, $cx, $name, $prec, $flags) = (@_, 0, 0);
1918 my $kid;
1919 if ($op->flags & OPf_KIDS) {
1920 $kid = $op->first;
1921 # If there's more than one kid, the first is an ex-pushmark.
1922 $kid = $kid->sibling if not null $kid->sibling;
1923 return $self->maybe_parens_unop($name, $kid, $cx);
1924 } else {
d989cdac 1925 return $name . ($op->flags & OPf_SPECIAL ? "()" : "");
bd0865ec
GS
1926 }
1927}
1928
1929sub pp_ucfirst { dq_unop(@_, "ucfirst") }
1930sub pp_lcfirst { dq_unop(@_, "lcfirst") }
1931sub pp_uc { dq_unop(@_, "uc") }
1932sub pp_lc { dq_unop(@_, "lc") }
3ed82cfc 1933sub pp_quotemeta { maybe_targmy(@_, \&dq_unop, "quotemeta") }
bd0865ec 1934
6e90668e
SM
1935sub loopex {
1936 my $self = shift;
9d2c6865 1937 my ($op, $cx, $name) = @_;
6e90668e 1938 if (class($op) eq "PVOP") {
9d2c6865
SM
1939 return "$name " . $op->pv;
1940 } elsif (class($op) eq "OP") {
1941 return $name;
6e90668e 1942 } elsif (class($op) eq "UNOP") {
9d2c6865
SM
1943 # Note -- loop exits are actually exempt from the
1944 # looks-like-a-func rule, but a few extra parens won't hurt
1945 return $self->maybe_parens_unop($name, $op->first, $cx);
6e90668e 1946 }
6e90668e
SM
1947}
1948
1949sub pp_last { loopex(@_, "last") }
1950sub pp_next { loopex(@_, "next") }
1951sub pp_redo { loopex(@_, "redo") }
1952sub pp_goto { loopex(@_, "goto") }
1953sub pp_dump { loopex(@_, "dump") }
1954
1955sub ftst {
1956 my $self = shift;
9d2c6865 1957 my($op, $cx, $name) = @_;
6e90668e 1958 if (class($op) eq "UNOP") {
9d2c6865
SM
1959 # Genuine `-X' filetests are exempt from the LLAFR, but not
1960 # l?stat(); for the sake of clarity, give'em all parens
1961 return $self->maybe_parens_unop($name, $op->first, $cx);
d989cdac 1962 } elsif (class($op) =~ /^(SV|PAD)OP$/) {
9d2c6865 1963 return $self->maybe_parens_func($name, $self->pp_gv($op, 1), $cx, 16);
6e90668e 1964 } else { # I don't think baseop filetests ever survive ck_ftst, but...
9d2c6865 1965 return $name;
6e90668e 1966 }
6e90668e
SM
1967}
1968
d989cdac
SM
1969sub pp_lstat { ftst(@_, "lstat") }
1970sub pp_stat { ftst(@_, "stat") }
1971sub pp_ftrread { ftst(@_, "-R") }
6e90668e 1972sub pp_ftrwrite { ftst(@_, "-W") }
d989cdac
SM
1973sub pp_ftrexec { ftst(@_, "-X") }
1974sub pp_fteread { ftst(@_, "-r") }
e31885a0 1975sub pp_ftewrite { ftst(@_, "-w") }
d989cdac
SM
1976sub pp_fteexec { ftst(@_, "-x") }
1977sub pp_ftis { ftst(@_, "-e") }
6e90668e
SM
1978sub pp_fteowned { ftst(@_, "-O") }
1979sub pp_ftrowned { ftst(@_, "-o") }
d989cdac
SM
1980sub pp_ftzero { ftst(@_, "-z") }
1981sub pp_ftsize { ftst(@_, "-s") }
1982sub pp_ftmtime { ftst(@_, "-M") }
1983sub pp_ftatime { ftst(@_, "-A") }
1984sub pp_ftctime { ftst(@_, "-C") }
1985sub pp_ftsock { ftst(@_, "-S") }
1986sub pp_ftchr { ftst(@_, "-c") }
1987sub pp_ftblk { ftst(@_, "-b") }
1988sub pp_ftfile { ftst(@_, "-f") }
1989sub pp_ftdir { ftst(@_, "-d") }
1990sub pp_ftpipe { ftst(@_, "-p") }
1991sub pp_ftlink { ftst(@_, "-l") }
1992sub pp_ftsuid { ftst(@_, "-u") }
1993sub pp_ftsgid { ftst(@_, "-g") }
1994sub pp_ftsvtx { ftst(@_, "-k") }
1995sub pp_fttty { ftst(@_, "-t") }
1996sub pp_fttext { ftst(@_, "-T") }
6e90668e
SM
1997sub pp_ftbinary { ftst(@_, "-B") }
1998
a798dbf2 1999sub SWAP_CHILDREN () { 1 }
6e90668e 2000sub ASSIGN () { 2 } # has OP= variant
7013e6ae 2001sub LIST_CONTEXT () { 4 } # Assignment is in list context
6e90668e 2002
9d2c6865
SM
2003my(%left, %right);
2004
2005sub assoc_class {
2006 my $op = shift;
3f872cb9
GS
2007 my $name = $op->name;
2008 if ($name eq "concat" and $op->first->name eq "concat") {
9d2c6865 2009 # avoid spurious `=' -- see comment in pp_concat
3f872cb9 2010 return "concat";
9d2c6865 2011 }
3f872cb9
GS
2012 if ($name eq "null" and class($op) eq "UNOP"
2013 and $op->first->name =~ /^(and|x?or)$/
9d2c6865
SM
2014 and null $op->first->sibling)
2015 {
2016 # Like all conditional constructs, OP_ANDs and OP_ORs are topped
2017 # with a null that's used as the common end point of the two
2018 # flows of control. For precedence purposes, ignore it.
2019 # (COND_EXPRs have these too, but we don't bother with
2020 # their associativity).
2021 return assoc_class($op->first);
2022 }
2023 return $name . ($op->flags & OPf_STACKED ? "=" : "");
2024}
2025
2026# Left associative operators, like `+', for which
2027# $a + $b + $c is equivalent to ($a + $b) + $c
2028
2029BEGIN {
3f872cb9
GS
2030 %left = ('multiply' => 19, 'i_multiply' => 19,
2031 'divide' => 19, 'i_divide' => 19,
2032 'modulo' => 19, 'i_modulo' => 19,
2033 'repeat' => 19,
2034 'add' => 18, 'i_add' => 18,
2035 'subtract' => 18, 'i_subtract' => 18,
2036 'concat' => 18,
2037 'left_shift' => 17, 'right_shift' => 17,
2038 'bit_and' => 13,
2039 'bit_or' => 12, 'bit_xor' => 12,
2040 'and' => 3,
2041 'or' => 2, 'xor' => 2,
9d2c6865
SM
2042 );
2043}
2044
2045sub deparse_binop_left {
2046 my $self = shift;
2047 my($op, $left, $prec) = @_;
58231d39 2048 if ($left{assoc_class($op)} && $left{assoc_class($left)}
9d2c6865
SM
2049 and $left{assoc_class($op)} == $left{assoc_class($left)})
2050 {
2051 return $self->deparse($left, $prec - .00001);
2052 } else {
2053 return $self->deparse($left, $prec);
2054 }
2055}
2056
2057# Right associative operators, like `=', for which
2058# $a = $b = $c is equivalent to $a = ($b = $c)
2059
2060BEGIN {
3f872cb9
GS
2061 %right = ('pow' => 22,
2062 'sassign=' => 7, 'aassign=' => 7,
2063 'multiply=' => 7, 'i_multiply=' => 7,
2064 'divide=' => 7, 'i_divide=' => 7,
2065 'modulo=' => 7, 'i_modulo=' => 7,
2066 'repeat=' => 7,
2067 'add=' => 7, 'i_add=' => 7,
2068 'subtract=' => 7, 'i_subtract=' => 7,
2069 'concat=' => 7,
2070 'left_shift=' => 7, 'right_shift=' => 7,
2071 'bit_and=' => 7,
2072 'bit_or=' => 7, 'bit_xor=' => 7,
2073 'andassign' => 7,
2074 'orassign' => 7,
9d2c6865
SM
2075 );
2076}
2077
2078sub deparse_binop_right {
2079 my $self = shift;
2080 my($op, $right, $prec) = @_;
58231d39 2081 if ($right{assoc_class($op)} && $right{assoc_class($right)}
9d2c6865
SM
2082 and $right{assoc_class($op)} == $right{assoc_class($right)})
2083 {
2084 return $self->deparse($right, $prec - .00001);
2085 } else {
2086 return $self->deparse($right, $prec);
2087 }
2088}
2089
a798dbf2 2090sub binop {
6e90668e 2091 my $self = shift;
9d2c6865 2092 my ($op, $cx, $opname, $prec, $flags) = (@_, 0);
a798dbf2
MB
2093 my $left = $op->first;
2094 my $right = $op->last;
9d2c6865
SM
2095 my $eq = "";
2096 if ($op->flags & OPf_STACKED && $flags & ASSIGN) {
2097 $eq = "=";
2098 $prec = 7;
2099 }
a798dbf2
MB
2100 if ($flags & SWAP_CHILDREN) {
2101 ($left, $right) = ($right, $left);
2102 }
9d2c6865 2103 $left = $self->deparse_binop_left($op, $left, $prec);
90c0eb26
RH
2104 $left = "($left)" if $flags & LIST_CONTEXT
2105 && $left !~ /^(my|our|local|)[\@\(]/;
9d2c6865
SM
2106 $right = $self->deparse_binop_right($op, $right, $prec);
2107 return $self->maybe_parens("$left $opname$eq $right", $cx, $prec);
2108}
2109
3ed82cfc
GS
2110sub pp_add { maybe_targmy(@_, \&binop, "+", 18, ASSIGN) }
2111sub pp_multiply { maybe_targmy(@_, \&binop, "*", 19, ASSIGN) }
2112sub pp_subtract { maybe_targmy(@_, \&binop, "-",18, ASSIGN) }
2113sub pp_divide { maybe_targmy(@_, \&binop, "/", 19, ASSIGN) }
2114sub pp_modulo { maybe_targmy(@_, \&binop, "%", 19, ASSIGN) }
2115sub pp_i_add { maybe_targmy(@_, \&binop, "+", 18, ASSIGN) }
2116sub pp_i_multiply { maybe_targmy(@_, \&binop, "*", 19, ASSIGN) }
2117sub pp_i_subtract { maybe_targmy(@_, \&binop, "-", 18, ASSIGN) }
2118sub pp_i_divide { maybe_targmy(@_, \&binop, "/", 19, ASSIGN) }
2119sub pp_i_modulo { maybe_targmy(@_, \&binop, "%", 19, ASSIGN) }
2120sub pp_pow { maybe_targmy(@_, \&binop, "**", 22, ASSIGN) }
2121
2122sub pp_left_shift { maybe_targmy(@_, \&binop, "<<", 17, ASSIGN) }
2123sub pp_right_shift { maybe_targmy(@_, \&binop, ">>", 17, ASSIGN) }
2124sub pp_bit_and { maybe_targmy(@_, \&binop, "&", 13, ASSIGN) }
2125sub pp_bit_or { maybe_targmy(@_, \&binop, "|", 12, ASSIGN) }
2126sub pp_bit_xor { maybe_targmy(@_, \&binop, "^", 12, ASSIGN) }
9d2c6865
SM
2127
2128sub pp_eq { binop(@_, "==", 14) }
2129sub pp_ne { binop(@_, "!=", 14) }
2130sub pp_lt { binop(@_, "<", 15) }
2131sub pp_gt { binop(@_, ">", 15) }
2132sub pp_ge { binop(@_, ">=", 15) }
2133sub pp_le { binop(@_, "<=", 15) }
2134sub pp_ncmp { binop(@_, "<=>", 14) }
2135sub pp_i_eq { binop(@_, "==", 14) }
2136sub pp_i_ne { binop(@_, "!=", 14) }
2137sub pp_i_lt { binop(@_, "<", 15) }
2138sub pp_i_gt { binop(@_, ">", 15) }
2139sub pp_i_ge { binop(@_, ">=", 15) }
2140sub pp_i_le { binop(@_, "<=", 15) }
2141sub pp_i_ncmp { binop(@_, "<=>", 14) }
2142
2143sub pp_seq { binop(@_, "eq", 14) }
2144sub pp_sne { binop(@_, "ne", 14) }
2145sub pp_slt { binop(@_, "lt", 15) }
2146sub pp_sgt { binop(@_, "gt", 15) }
2147sub pp_sge { binop(@_, "ge", 15) }
2148sub pp_sle { binop(@_, "le", 15) }
2149sub pp_scmp { binop(@_, "cmp", 14) }
2150
2151sub pp_sassign { binop(@_, "=", 7, SWAP_CHILDREN) }
7013e6ae 2152sub pp_aassign { binop(@_, "=", 7, SWAP_CHILDREN | LIST_CONTEXT) }
6e90668e 2153
0d863452
RH
2154sub pp_smartmatch {
2155 my ($self, $op, $cx) = @_;
2156 if ($op->flags & OPf_SPECIAL) {
9210de83 2157 return $self->deparse($op->last, $cx);
0d863452
RH
2158 }
2159 else {
2160 binop(@_, "~~", 14);
2161 }
2162}
2163
6e90668e
SM
2164# `.' is special because concats-of-concats are optimized to save copying
2165# by making all but the first concat stacked. The effect is as if the
2166# programmer had written `($a . $b) .= $c', except legal.
3ed82cfc
GS
2167sub pp_concat { maybe_targmy(@_, \&real_concat) }
2168sub real_concat {
6e90668e 2169 my $self = shift;
9d2c6865 2170 my($op, $cx) = @_;
6e90668e
SM
2171 my $left = $op->first;
2172 my $right = $op->last;
2173 my $eq = "";
9d2c6865 2174 my $prec = 18;
3f872cb9 2175 if ($op->flags & OPf_STACKED and $op->first->name ne "concat") {
6e90668e 2176 $eq = "=";
9d2c6865 2177 $prec = 7;
6e90668e 2178 }
9d2c6865
SM
2179 $left = $self->deparse_binop_left($op, $left, $prec);
2180 $right = $self->deparse_binop_right($op, $right, $prec);
2181 return $self->maybe_parens("$left .$eq $right", $cx, $prec);
6e90668e
SM
2182}
2183
2184# `x' is weird when the left arg is a list
2185sub pp_repeat {
2186 my $self = shift;
9d2c6865 2187 my($op, $cx) = @_;
6e90668e
SM
2188 my $left = $op->first;
2189 my $right = $op->last;
9d2c6865
SM
2190 my $eq = "";
2191 my $prec = 19;
2192 if ($op->flags & OPf_STACKED) {
2193 $eq = "=";
2194 $prec = 7;
2195 }
6e90668e
SM
2196 if (null($right)) { # list repeat; count is inside left-side ex-list
2197 my $kid = $left->first->sibling; # skip pushmark
2198 my @exprs;
2199 for (; !null($kid->sibling); $kid = $kid->sibling) {
9d2c6865 2200 push @exprs, $self->deparse($kid, 6);
6e90668e
SM
2201 }
2202 $right = $kid;
2203 $left = "(" . join(", ", @exprs). ")";
2204 } else {
9d2c6865 2205 $left = $self->deparse_binop_left($op, $left, $prec);
6e90668e 2206 }
9d2c6865
SM
2207 $right = $self->deparse_binop_right($op, $right, $prec);
2208 return $self->maybe_parens("$left x$eq $right", $cx, $prec);
6e90668e
SM
2209}
2210
2211sub range {
2212 my $self = shift;
9d2c6865 2213 my ($op, $cx, $type) = @_;
6e90668e
SM
2214 my $left = $op->first;
2215 my $right = $left->sibling;
9d2c6865
SM
2216 $left = $self->deparse($left, 9);
2217 $right = $self->deparse($right, 9);
2218 return $self->maybe_parens("$left $type $right", $cx, 9);
6e90668e
SM
2219}
2220
2221sub pp_flop {
2222 my $self = shift;
9d2c6865 2223 my($op, $cx) = @_;
6e90668e
SM
2224 my $flip = $op->first;
2225 my $type = ($flip->flags & OPf_SPECIAL) ? "..." : "..";
9d2c6865 2226 return $self->range($flip->first, $cx, $type);
6e90668e
SM
2227}
2228
2229# one-line while/until is handled in pp_leave
2230
2231sub logop {
2232 my $self = shift;
9d2c6865 2233 my ($op, $cx, $lowop, $lowprec, $highop, $highprec, $blockname) = @_;
6e90668e
SM
2234 my $left = $op->first;
2235 my $right = $op->first->sibling;
d989cdac 2236 if ($cx < 1 and is_scope($right) and $blockname
58cccf98
SM
2237 and $self->{'expand'} < 7)
2238 { # if ($a) {$b}
9d2c6865
SM
2239 $left = $self->deparse($left, 1);
2240 $right = $self->deparse($right, 0);
2241 return "$blockname ($left) {\n\t$right\n\b}\cK";
d989cdac 2242 } elsif ($cx < 1 and $blockname and not $self->{'parens'}
58cccf98 2243 and $self->{'expand'} < 7) { # $b if $a
9d2c6865
SM
2244 $right = $self->deparse($right, 1);
2245 $left = $self->deparse($left, 1);
2246 return "$right $blockname $left";
2247 } elsif ($cx > $lowprec and $highop) { # $a && $b
2248 $left = $self->deparse_binop_left($op, $left, $highprec);
2249 $right = $self->deparse_binop_right($op, $right, $highprec);
2250 return $self->maybe_parens("$left $highop $right", $cx, $highprec);
2251 } else { # $a and $b
2252 $left = $self->deparse_binop_left($op, $left, $lowprec);
2253 $right = $self->deparse_binop_right($op, $right, $lowprec);
d989cdac 2254 return $self->maybe_parens("$left $lowop $right", $cx, $lowprec);
9d2c6865
SM
2255 }
2256}
2257
2258sub pp_and { logop(@_, "and", 3, "&&", 11, "if") }
f4a44678 2259sub pp_or { logop(@_, "or", 2, "||", 10, "unless") }
5b99f273 2260sub pp_dor { logop(@_, "//", 10) }
3ed82cfc
GS
2261
2262# xor is syntactically a logop, but it's really a binop (contrary to
2263# old versions of opcode.pl). Syntax is what matters here.
9d2c6865 2264sub pp_xor { logop(@_, "xor", 2, "", 0, "") }
6e90668e
SM
2265
2266sub logassignop {
2267 my $self = shift;
9d2c6865 2268 my ($op, $cx, $opname) = @_;
6e90668e
SM
2269 my $left = $op->first;
2270 my $right = $op->first->sibling->first; # skip sassign
9d2c6865
SM
2271 $left = $self->deparse($left, 7);
2272 $right = $self->deparse($right, 7);
2273 return $self->maybe_parens("$left $opname $right", $cx, 7);
a798dbf2
MB
2274}
2275
6e90668e 2276sub pp_andassign { logassignop(@_, "&&=") }
c963b151
BD
2277sub pp_orassign { logassignop(@_, "||=") }
2278sub pp_dorassign { logassignop(@_, "//=") }
6e90668e
SM
2279
2280sub listop {
2281 my $self = shift;
9d2c6865
SM
2282 my($op, $cx, $name) = @_;
2283 my(@exprs);
2284 my $parens = ($cx >= 5) || $self->{'parens'};
2285 my $kid = $op->first->sibling;
2286 return $name if null $kid;
e31885a0 2287 my $first;
fb725297 2288 $name = "socketpair" if $name eq "sockpair";
b72c97e8
RGS
2289 my $proto = prototype("CORE::$name");
2290 if (defined $proto
2291 && $proto =~ /^;?\*/
e31885a0
RH
2292 && $kid->name eq "rv2gv") {
2293 $first = $self->deparse($kid->first, 6);
2294 }
2295 else {
2296 $first = $self->deparse($kid, 6);
2297 }
e99ebc55 2298 if ($name eq "chmod" && $first =~ /^\d+$/) {
a0035eb8 2299 $first = sprintf("%#o", $first);
e99ebc55 2300 }
9d2c6865
SM
2301 $first = "+$first" if not $parens and substr($first, 0, 1) eq "(";
2302 push @exprs, $first;
2303 $kid = $kid->sibling;
e1f56625 2304 if (defined $proto && $proto =~ /^\*\*/ && $kid->name eq "rv2gv") {
b72c97e8
RGS
2305 push @exprs, $self->deparse($kid->first, 6);
2306 $kid = $kid->sibling;
2307 }
9d2c6865
SM
2308 for (; !null($kid); $kid = $kid->sibling) {
2309 push @exprs, $self->deparse($kid, 6);
2310 }
689e417f
VP
2311 if ($name eq "reverse" && ($op->private & OPpREVERSE_INPLACE)) {
2312 return "$exprs[0] = $name" . ($parens ? "($exprs[0])" : " $exprs[0]");
2313 }
9d2c6865
SM
2314 if ($parens) {
2315 return "$name(" . join(", ", @exprs) . ")";
2316 } else {
2317 return "$name " . join(", ", @exprs);
6e90668e 2318 }
6e90668e 2319}
a798dbf2 2320
6e90668e 2321sub pp_bless { listop(@_, "bless") }
3ed82cfc 2322sub pp_atan2 { maybe_targmy(@_, \&listop, "atan2") }
6e90668e
SM
2323sub pp_substr { maybe_local(@_, listop(@_, "substr")) }
2324sub pp_vec { maybe_local(@_, listop(@_, "vec")) }
3ed82cfc
GS
2325sub pp_index { maybe_targmy(@_, \&listop, "index") }
2326sub pp_rindex { maybe_targmy(@_, \&listop, "rindex") }
2327sub pp_sprintf { maybe_targmy(@_, \&listop, "sprintf") }
6e90668e 2328sub pp_formline { listop(@_, "formline") } # see also deparse_format
3ed82cfc 2329sub pp_crypt { maybe_targmy(@_, \&listop, "crypt") }
6e90668e
SM
2330sub pp_unpack { listop(@_, "unpack") }
2331sub pp_pack { listop(@_, "pack") }
3ed82cfc 2332sub pp_join { maybe_targmy(@_, \&listop, "join") }
6e90668e 2333sub pp_splice { listop(@_, "splice") }
3ed82cfc
GS
2334sub pp_push { maybe_targmy(@_, \&listop, "push") }
2335sub pp_unshift { maybe_targmy(@_, \&listop, "unshift") }
6e90668e
SM
2336sub pp_reverse { listop(@_, "reverse") }
2337sub pp_warn { listop(@_, "warn") }
2338sub pp_die { listop(@_, "die") }
9d2c6865
SM
2339# Actually, return is exempt from the LLAFR (see examples in this very
2340# module!), but for consistency's sake, ignore that fact
6e90668e
SM
2341sub pp_return { listop(@_, "return") }
2342sub pp_open { listop(@_, "open") }
2343sub pp_pipe_op { listop(@_, "pipe") }
2344sub pp_tie { listop(@_, "tie") }
82bafd27 2345sub pp_binmode { listop(@_, "binmode") }
6e90668e
SM
2346sub pp_dbmopen { listop(@_, "dbmopen") }
2347sub pp_sselect { listop(@_, "select") }
2348sub pp_select { listop(@_, "select") }
2349sub pp_read { listop(@_, "read") }
2350sub pp_sysopen { listop(@_, "sysopen") }
2351sub pp_sysseek { listop(@_, "sysseek") }
2352sub pp_sysread { listop(@_, "sysread") }
2353sub pp_syswrite { listop(@_, "syswrite") }
2354sub pp_send { listop(@_, "send") }
2355sub pp_recv { listop(@_, "recv") }
2356sub pp_seek { listop(@_, "seek") }
6e90668e
SM
2357sub pp_fcntl { listop(@_, "fcntl") }
2358sub pp_ioctl { listop(@_, "ioctl") }
3ed82cfc 2359sub pp_flock { maybe_targmy(@_, \&listop, "flock") }
6e90668e
SM
2360sub pp_socket { listop(@_, "socket") }
2361sub pp_sockpair { listop(@_, "sockpair") }
2362sub pp_bind { listop(@_, "bind") }
2363sub pp_connect { listop(@_, "connect") }
2364sub pp_listen { listop(@_, "listen") }
2365sub pp_accept { listop(@_, "accept") }
2366sub pp_shutdown { listop(@_, "shutdown") }
2367sub pp_gsockopt { listop(@_, "getsockopt") }
2368sub pp_ssockopt { listop(@_, "setsockopt") }
3ed82cfc
GS
2369sub pp_chown { maybe_targmy(@_, \&listop, "chown") }
2370sub pp_unlink { maybe_targmy(@_, \&listop, "unlink") }
2371sub pp_chmod { maybe_targmy(@_, \&listop, "chmod") }
2372sub pp_utime { maybe_targmy(@_, \&listop, "utime") }
2373sub pp_rename { maybe_targmy(@_, \&listop, "rename") }
2374sub pp_link { maybe_targmy(@_, \&listop, "link") }
2375sub pp_symlink { maybe_targmy(@_, \&listop, "symlink") }
2376sub pp_mkdir { maybe_targmy(@_, \&listop, "mkdir") }
6e90668e
SM
2377sub pp_open_dir { listop(@_, "opendir") }
2378sub pp_seekdir { listop(@_, "seekdir") }
3ed82cfc
GS
2379sub pp_waitpid { maybe_targmy(@_, \&listop, "waitpid") }
2380sub pp_system { maybe_targmy(@_, \&listop, "system") }
2381sub pp_exec { maybe_targmy(@_, \&listop, "exec") }
2382sub pp_kill { maybe_targmy(@_, \&listop, "kill") }
2383sub pp_setpgrp { maybe_targmy(@_, \&listop, "setpgrp") }
2384sub pp_getpriority { maybe_targmy(@_, \&listop, "getpriority") }
2385sub pp_setpriority { maybe_targmy(@_, \&listop, "setpriority") }
6e90668e
SM
2386sub pp_shmget { listop(@_, "shmget") }
2387sub pp_shmctl { listop(@_, "shmctl") }
2388sub pp_shmread { listop(@_, "shmread") }
2389sub pp_shmwrite { listop(@_, "shmwrite") }
2390sub pp_msgget { listop(@_, "msgget") }
2391sub pp_msgctl { listop(@_, "msgctl") }
2392sub pp_msgsnd { listop(@_, "msgsnd") }
2393sub pp_msgrcv { listop(@_, "msgrcv") }
2394sub pp_semget { listop(@_, "semget") }
2395sub pp_semctl { listop(@_, "semctl") }
2396sub pp_semop { listop(@_, "semop") }
2397sub pp_ghbyaddr { listop(@_, "gethostbyaddr") }
2398sub pp_gnbyaddr { listop(@_, "getnetbyaddr") }
2399sub pp_gpbynumber { listop(@_, "getprotobynumber") }
2400sub pp_gsbyname { listop(@_, "getservbyname") }
2401sub pp_gsbyport { listop(@_, "getservbyport") }
2402sub pp_syscall { listop(@_, "syscall") }
2403
2404sub pp_glob {
2405 my $self = shift;
9d2c6865 2406 my($op, $cx) = @_;
6e90668e
SM
2407 my $text = $self->dq($op->first->sibling); # skip pushmark
2408 if ($text =~ /^\$?(\w|::|\`)+$/ # could look like a readline
d989cdac 2409 or $text =~ /[<>]/) {
6e90668e
SM
2410 return 'glob(' . single_delim('qq', '"', $text) . ')';
2411 } else {
2412 return '<' . $text . '>';
2413 }
2414}
2415
f5aa8f4e
SM
2416# Truncate is special because OPf_SPECIAL makes a bareword first arg
2417# be a filehandle. This could probably be better fixed in the core
2418# by moving the GV lookup into ck_truc.
2419
2420sub pp_truncate {
2421 my $self = shift;
2422 my($op, $cx) = @_;
2423 my(@exprs);
2424 my $parens = ($cx >= 5) || $self->{'parens'};
2425 my $kid = $op->first->sibling;
acba1d67 2426 my $fh;
f5aa8f4e
SM
2427 if ($op->flags & OPf_SPECIAL) {
2428 # $kid is an OP_CONST
18228111 2429 $fh = $self->const_sv($kid)->PV;
f5aa8f4e
SM
2430 } else {
2431 $fh = $self->deparse($kid, 6);
2432 $fh = "+$fh" if not $parens and substr($fh, 0, 1) eq "(";
2433 }
2434 my $len = $self->deparse($kid->sibling, 6);
2435 if ($parens) {
2436 return "truncate($fh, $len)";
2437 } else {
2438 return "truncate $fh, $len";
2439 }
f5aa8f4e
SM
2440}
2441
6e90668e
SM
2442sub indirop {
2443 my $self = shift;
9d2c6865 2444 my($op, $cx, $name) = @_;
6e90668e
SM
2445 my($expr, @exprs);
2446 my $kid = $op->first->sibling;
2447 my $indir = "";
2448 if ($op->flags & OPf_STACKED) {
2449 $indir = $kid;
2450 $indir = $indir->first; # skip rv2gv
2451 if (is_scope($indir)) {
9d2c6865 2452 $indir = "{" . $self->deparse($indir, 0) . "}";
d989cdac 2453 $indir = "{;}" if $indir eq "{}";
c73811ab
RH
2454 } elsif ($indir->name eq "const" && $indir->private & OPpCONST_BARE) {
2455 $indir = $self->const_sv($indir)->PV;
6e90668e 2456 } else {
9d2c6865 2457 $indir = $self->deparse($indir, 24);
6e90668e
SM
2458 }
2459 $indir = $indir . " ";
2460 $kid = $kid->sibling;
2461 }
7e80da18 2462 if ($name eq "sort" && $op->private & (OPpSORT_NUMERIC | OPpSORT_INTEGER)) {
3ac6e0f9 2463 $indir = ($op->private & OPpSORT_DESCEND) ? '{$b <=> $a} '
7e80da18
RH
2464 : '{$a <=> $b} ';
2465 }
3ac6e0f9 2466 elsif ($name eq "sort" && $op->private & OPpSORT_DESCEND) {
7e80da18
RH
2467 $indir = '{$b cmp $a} ';
2468 }
6e90668e 2469 for (; !null($kid); $kid = $kid->sibling) {
9d2c6865 2470 $expr = $self->deparse($kid, 6);
6e90668e
SM
2471 push @exprs, $expr;
2472 }
3ac6e0f9
RGS
2473 my $name2 = $name;
2474 if ($name eq "sort" && $op->private & OPpSORT_REVERSE) {
2475 $name2 = 'reverse sort';
2476 }
2b6e98cb 2477 if ($name eq "sort" && ($op->private & OPpSORT_INPLACE)) {
3ac6e0f9 2478 return "$exprs[0] = $name2 $indir $exprs[0]";
2b6e98cb
DM
2479 }
2480
d989cdac
SM
2481 my $args = $indir . join(", ", @exprs);
2482 if ($indir ne "" and $name eq "sort") {
2483 # We don't want to say "sort(f 1, 2, 3)", since perl -w will
2484 # give bareword warnings in that case. Therefore if context
2485 # requires, we'll put parens around the outside "(sort f 1, 2,
2486 # 3)". Unfortunately, we'll currently think the parens are
3c4b39be 2487 # necessary more often that they really are, because we don't
d989cdac
SM
2488 # distinguish which side of an assignment we're on.
2489 if ($cx >= 5) {
3ac6e0f9 2490 return "($name2 $args)";
d989cdac 2491 } else {
3ac6e0f9 2492 return "$name2 $args";
d989cdac
SM
2493 }
2494 } else {
3ac6e0f9 2495 return $self->maybe_parens_func($name2, $args, $cx, 5);
d989cdac
SM
2496 }
2497
6e90668e
SM
2498}
2499
2500sub pp_prtf { indirop(@_, "printf") }
2501sub pp_print { indirop(@_, "print") }
9b08e3d3 2502sub pp_say { indirop(@_, "say") }
6e90668e
SM
2503sub pp_sort { indirop(@_, "sort") }
2504
2505sub mapop {
2506 my $self = shift;
9d2c6865 2507 my($op, $cx, $name) = @_;
6e90668e
SM
2508 my($expr, @exprs);
2509 my $kid = $op->first; # this is the (map|grep)start
2510 $kid = $kid->first->sibling; # skip a pushmark
2511 my $code = $kid->first; # skip a null
2512 if (is_scope $code) {
f4a44678 2513 $code = "{" . $self->deparse($code, 0) . "} ";
6e90668e 2514 } else {
9d2c6865 2515 $code = $self->deparse($code, 24) . ", ";
6e90668e
SM
2516 }
2517 $kid = $kid->sibling;
2518 for (; !null($kid); $kid = $kid->sibling) {
9d2c6865 2519 $expr = $self->deparse($kid, 6);
9a58b761 2520 push @exprs, $expr if defined $expr;
6e90668e 2521 }
9d2c6865 2522 return $self->maybe_parens_func($name, $code . join(", ", @exprs), $cx, 5);
6e90668e
SM
2523}
2524
d989cdac
SM
2525sub pp_mapwhile { mapop(@_, "map") }
2526sub pp_grepwhile { mapop(@_, "grep") }
11e09183
SP
2527sub pp_mapstart { baseop(@_, "map") }
2528sub pp_grepstart { baseop(@_, "grep") }
6e90668e
SM
2529
2530sub pp_list {
2531 my $self = shift;
9d2c6865 2532 my($op, $cx) = @_;
6e90668e
SM
2533 my($expr, @exprs);
2534 my $kid = $op->first->sibling; # skip pushmark
2535 my $lop;
3462b4ac 2536 my $local = "either"; # could be local(...), my(...), state(...) or our(...)
6e90668e
SM
2537 for ($lop = $kid; !null($lop); $lop = $lop->sibling) {
2538 # This assumes that no other private flags equal 128, and that
2539 # OPs that store things other than flags in their op_private,
2540 # like OP_AELEMFAST, won't be immediate children of a list.
b8e103fc
RH
2541 #
2542 # OP_ENTERSUB can break this logic, so check for it.
2543 # I suspect that open and exit can too.
2544
2545 if (!($lop->private & (OPpLVAL_INTRO|OPpOUR_INTRO)
ce4e655d 2546 or $lop->name eq "undef")
b8e103fc
RH
2547 or $lop->name eq "entersub"
2548 or $lop->name eq "exit"
2549 or $lop->name eq "open")
6e90668e
SM
2550 {
2551 $local = ""; # or not
2552 last;
2553 }
3462b4ac
RGS
2554 if ($lop->name =~ /^pad[ash]v$/) {
2555 if ($lop->private & OPpPAD_STATE) { # state()
2556 ($local = "", last) if $local =~ /^(?:local|our|my)$/;
2557 $local = "state";
2558 } else { # my()
2559 ($local = "", last) if $local =~ /^(?:local|our|state)$/;
2560 $local = "my";
2561 }
b8e103fc
RH
2562 } elsif ($lop->name =~ /^(gv|rv2)[ash]v$/
2563 && $lop->private & OPpOUR_INTRO
2564 or $lop->name eq "null" && $lop->first->name eq "gvsv"
2565 && $lop->first->private & OPpOUR_INTRO) { # our()
3462b4ac 2566 ($local = "", last) if $local =~ /^(?:my|local|state)$/;
ce4e655d 2567 $local = "our";
3ac6e0f9
RGS
2568 } elsif ($lop->name ne "undef"
2569 # specifically avoid the "reverse sort" optimisation,
2570 # where "reverse" is nullified
36d57d93 2571 && !($lop->name eq 'sort' && ($lop->flags & OPpSORT_REVERSE)))
3ac6e0f9
RGS
2572 {
2573 # local()
3462b4ac 2574 ($local = "", last) if $local =~ /^(?:my|our|state)$/;
6e90668e
SM
2575 $local = "local";
2576 }
2577 }
2578 $local = "" if $local eq "either"; # no point if it's all undefs
f5aa8f4e 2579 return $self->deparse($kid, $cx) if null $kid->sibling and not $local;
6e90668e
SM
2580 for (; !null($kid); $kid = $kid->sibling) {
2581 if ($local) {
3f872cb9 2582 if (class($kid) eq "UNOP" and $kid->first->name eq "gvsv") {
6e90668e
SM
2583 $lop = $kid->first;
2584 } else {
2585 $lop = $kid;
2586 }
2587 $self->{'avoid_local'}{$$lop}++;
9d2c6865 2588 $expr = $self->deparse($kid, 6);
6e90668e
SM
2589 delete $self->{'avoid_local'}{$$lop};
2590 } else {
9d2c6865 2591 $expr = $self->deparse($kid, 6);
6e90668e
SM
2592 }
2593 push @exprs, $expr;
2594 }
9d2c6865
SM
2595 if ($local) {
2596 return "$local(" . join(", ", @exprs) . ")";
2597 } else {
2598 return $self->maybe_parens( join(", ", @exprs), $cx, 6);
2599 }
6e90668e
SM
2600}
2601
6f611a1a
GS
2602sub is_ifelse_cont {
2603 my $op = shift;
2604 return ($op->name eq "null" and class($op) eq "UNOP"
2605 and $op->first->name =~ /^(and|cond_expr)$/
2606 and is_scope($op->first->first->sibling));
2607}
2608
6e90668e
SM
2609sub pp_cond_expr {
2610 my $self = shift;
9d2c6865 2611 my($op, $cx) = @_;
6e90668e
SM
2612 my $cond = $op->first;
2613 my $true = $cond->sibling;
2614 my $false = $true->sibling;
9d2c6865 2615 my $cuddle = $self->{'cuddle'};
d989cdac 2616 unless ($cx < 1 and (is_scope($true) and $true->name ne "null") and
58cccf98
SM
2617 (is_scope($false) || is_ifelse_cont($false))
2618 and $self->{'expand'} < 7) {
f5aa8f4e 2619 $cond = $self->deparse($cond, 8);
cfaba469 2620 $true = $self->deparse($true, 6);
9d2c6865
SM
2621 $false = $self->deparse($false, 8);
2622 return $self->maybe_parens("$cond ? $true : $false", $cx, 8);
6f611a1a
GS
2623 }
2624
f5aa8f4e 2625 $cond = $self->deparse($cond, 1);
d989cdac 2626 $true = $self->deparse($true, 0);
6f611a1a
GS
2627 my $head = "if ($cond) {\n\t$true\n\b}";
2628 my @elsifs;
2629 while (!null($false) and is_ifelse_cont($false)) {
2630 my $newop = $false->first;
2631 my $newcond = $newop->first;
2632 my $newtrue = $newcond->sibling;
2633 $false = $newtrue->sibling; # last in chain is OP_AND => no else
7ecdd211
PJ
2634 if ($newcond->name eq "lineseq")
2635 {
2636 # lineseq to ensure correct line numbers in elsif()
2637 # Bug #37302 fixed by change #33710.
2638 $newcond = $newcond->first->sibling;
2639 }
6f611a1a
GS
2640 $newcond = $self->deparse($newcond, 1);
2641 $newtrue = $self->deparse($newtrue, 0);
2642 push @elsifs, "elsif ($newcond) {\n\t$newtrue\n\b}";
2643 }
d989cdac 2644 if (!null($false)) {
6f611a1a
GS
2645 $false = $cuddle . "else {\n\t" .
2646 $self->deparse($false, 0) . "\n\b}\cK";
2647 } else {
2648 $false = "\cK";
6e90668e 2649 }
d989cdac 2650 return $head . join($cuddle, "", @elsifs) . $false;
6e90668e
SM
2651}
2652
95562366
NC
2653sub pp_once {
2654 my ($self, $op, $cx) = @_;
2655 my $cond = $op->first;
2656 my $true = $cond->sibling;
2657
2658 return $self->deparse($true, $cx);
2659}
2660
58cccf98 2661sub loop_common {
6e90668e 2662 my $self = shift;
58cccf98 2663 my($op, $cx, $init) = @_;
6e90668e
SM
2664 my $enter = $op->first;
2665 my $kid = $enter->sibling;
0ced6c29
RGS
2666 local(@$self{qw'curstash warnings hints hinthash'})
2667 = @$self{qw'curstash warnings hints hinthash'};
6e90668e 2668 my $head = "";
9d2c6865 2669 my $bare = 0;
58cccf98
SM
2670 my $body;
2671 my $cond = undef;
d989cdac 2672 if ($kid->name eq "lineseq") { # bare or infinite loop
241416b8 2673 if ($kid->last->name eq "unstack") { # infinite
e99ebc55 2674 $head = "while (1) "; # Can't use for(;;) if there's a continue
58cccf98 2675 $cond = "";
9d2c6865
SM
2676 } else {
2677 $bare = 1;
6e90668e 2678 }
58cccf98 2679 $body = $kid;
3f872cb9 2680 } elsif ($enter->name eq "enteriter") { # foreach
6e90668e
SM
2681 my $ary = $enter->first->sibling; # first was pushmark
2682 my $var = $ary->sibling;
36d57d93
RGS
2683 if ($ary->name eq 'null' and $enter->private & OPpITER_REVERSED) {
2684 # "reverse" was optimised away
aae53c41 2685 $ary = listop($self, $ary->first->sibling, 1, 'reverse');
36d57d93 2686 } elsif ($enter->flags & OPf_STACKED
f5aa8f4e
SM
2687 and not null $ary->first->sibling->sibling)
2688 {
d7f5b6da
SM
2689 $ary = $self->deparse($ary->first->sibling, 9) . " .. " .
2690 $self->deparse($ary->first->sibling->sibling, 9);
d8d95777
GA
2691 } else {
2692 $ary = $self->deparse($ary, 1);
2693 }
6e90668e 2694 if (null $var) {
823eff14
NC
2695 if (($enter->flags & OPf_SPECIAL) && ($] < 5.009)) {
2696 # thread special var, under 5005threads
9d2c6865 2697 $var = $self->pp_threadsv($enter, 1);
f6f9bdb7 2698 } else { # regular my() variable
9d2c6865 2699 $var = $self->pp_padsv($enter, 1);
6e90668e 2700 }
3f872cb9 2701 } elsif ($var->name eq "rv2gv") {
9d2c6865 2702 $var = $self->pp_rv2sv($var, 1);
241416b8
DM
2703 if ($enter->private & OPpOUR_INTRO) {
2704 # our declarations don't have package names
2705 $var =~ s/^(.).*::/$1/;
2706 $var = "our $var";
2707 }
3f872cb9 2708 } elsif ($var->name eq "gv") {
9d2c6865 2709 $var = "\$" . $self->deparse($var, 1);
6e90668e 2710 }
58cccf98 2711 $body = $kid->first->first->sibling; # skip OP_AND and OP_ITER
cf24a840
SM
2712 if (!is_state $body->first and $body->first->name ne "stub") {
2713 confess unless $var eq '$_';
2714 $body = $body->first;
2715 return $self->deparse($body, 2) . " foreach ($ary)";
2716 }
2717 $head = "foreach $var ($ary) ";
3f872cb9 2718 } elsif ($kid->name eq "null") { # while/until
6e90668e 2719 $kid = $kid->first;
58cccf98
SM
2720 my $name = {"and" => "while", "or" => "until"}->{$kid->name};
2721 $cond = $self->deparse($kid->first, 1);
2722 $head = "$name ($cond) ";
2723 $body = $kid->first->sibling;
3f872cb9 2724 } elsif ($kid->name eq "stub") { # bare and empty
9d2c6865 2725 return "{;}"; # {} could be a hashref
6e90668e 2726 }
58cccf98 2727 # If there isn't a continue block, then the next pointer for the loop
241416b8 2728 # will point to the unstack, which is kid's last child, except
58cccf98 2729 # in a bare loop, when it will point to the leaveloop. When neither of
241416b8 2730 # these conditions hold, then the second-to-last child is the continue
58cccf98
SM
2731 # block (or the last in a bare loop).
2732 my $cont_start = $enter->nextop;
2733 my $cont;
241416b8 2734 if ($$cont_start != $$op && ${$cont_start} != ${$body->last}) {
58cccf98
SM
2735 if ($bare) {
2736 $cont = $body->last;
2737 } else {
2738 $cont = $body->first;
241416b8 2739 while (!null($cont->sibling->sibling)) {
58cccf98
SM
2740 $cont = $cont->sibling;
2741 }
2742 }
2743 my $state = $body->first;
2744 my $cuddle = $self->{'cuddle'};
2745 my @states;
2746 for (; $$state != $$cont; $state = $state->sibling) {
2747 push @states, $state;
2748 }
ce4e655d 2749 $body = $self->lineseq(undef, @states);
58cccf98
SM
2750 if (defined $cond and not is_scope $cont and $self->{'expand'} < 3) {
2751 $head = "for ($init; $cond; " . $self->deparse($cont, 1) .") ";
2752 $cont = "\cK";
2753 } else {
2754 $cont = $cuddle . "continue {\n\t" .
2755 $self->deparse($cont, 0) . "\n\b}\cK";
6e90668e 2756 }
6e90668e 2757 } else {
7a9b44b9 2758 return "" if !defined $body;
c73811ab
RH
2759 if (length $init) {
2760 $head = "for ($init; $cond;) ";
2761 }
9d2c6865 2762 $cont = "\cK";
58cccf98 2763 $body = $self->deparse($body, 0);
6e90668e 2764 }
ce4e655d 2765 $body =~ s/;?$/;\n/;
34a48b4b
RH
2766
2767 return $head . "{\n\t" . $body . "\b}" . $cont;
58cccf98
SM
2768}
2769
09d856fb 2770sub pp_leaveloop { shift->loop_common(@_, "") }
58cccf98
SM
2771
2772sub for_loop {
2773 my $self = shift;
2774 my($op, $cx) = @_;
2775 my $init = $self->deparse($op, 1);
eae48c89
Z
2776 my $s = $op->sibling;
2777 my $ll = $s->name eq "unstack" ? $s->sibling : $s->first->sibling;
2778 return $self->loop_common($ll, $cx, $init);
6e90668e
SM
2779}
2780
2781sub pp_leavetry {
2782 my $self = shift;
9d2c6865 2783 return "eval {\n\t" . $self->pp_leave(@_) . "\n\b}";
bd0865ec 2784}
6e90668e 2785
bd0865ec
GS
2786BEGIN { eval "sub OP_CONST () {" . opnumber("const") . "}" }
2787BEGIN { eval "sub OP_STRINGIFY () {" . opnumber("stringify") . "}" }
a9760014 2788BEGIN { eval "sub OP_RV2SV () {" . opnumber("rv2sv") . "}" }
90c0eb26 2789BEGIN { eval "sub OP_LIST () {" . opnumber("list") . "}" }
f5aa8f4e 2790
a798dbf2 2791sub pp_null {
6e90668e 2792 my $self = shift;
d989cdac 2793 my($op, $cx) = @_;
6e90668e 2794 if (class($op) eq "OP") {
f4a44678
SM
2795 # old value is lost
2796 return $self->{'ex_const'} if $op->targ == OP_CONST;
3f872cb9 2797 } elsif ($op->first->name eq "pushmark") {
9d2c6865 2798 return $self->pp_list($op, $cx);
3f872cb9 2799 } elsif ($op->first->name eq "enter") {
9d2c6865 2800 return $self->pp_leave($op, $cx);
31c6271a
RD
2801 } elsif ($op->first->name eq "leave") {
2802 return $self->pp_leave($op->first, $cx);
2803 } elsif ($op->first->name eq "scope") {
2804 return $self->pp_scope($op->first, $cx);
bd0865ec 2805 } elsif ($op->targ == OP_STRINGIFY) {
6f611a1a 2806 return $self->dquote($op, $cx);
6e90668e 2807 } elsif (!null($op->first->sibling) and
3f872cb9 2808 $op->first->sibling->name eq "readline" and
6e90668e 2809 $op->first->sibling->flags & OPf_STACKED) {
9d2c6865
SM
2810 return $self->maybe_parens($self->deparse($op->first, 7) . " = "
2811 . $self->deparse($op->first->sibling, 7),
2812 $cx, 7);
6e90668e 2813 } elsif (!null($op->first->sibling) and
3f872cb9 2814 $op->first->sibling->name eq "trans" and
6e90668e 2815 $op->first->sibling->flags & OPf_STACKED) {
9d2c6865
SM
2816 return $self->maybe_parens($self->deparse($op->first, 20) . " =~ "
2817 . $self->deparse($op->first->sibling, 20),
2818 $cx, 20);
d989cdac
SM
2819 } elsif ($op->flags & OPf_SPECIAL && $cx < 1 && !$op->targ) {
2820 return "do {\n\t". $self->deparse($op->first, $cx) ."\n\b};";
ad8caead
RGS
2821 } elsif (!null($op->first->sibling) and
2822 $op->first->sibling->name eq "null" and
2823 class($op->first->sibling) eq "UNOP" and
2824 $op->first->sibling->first->flags & OPf_STACKED and
2825 $op->first->sibling->first->name eq "rcatline") {
2826 return $self->maybe_parens($self->deparse($op->first, 18) . " .= "
2827 . $self->deparse($op->first->sibling, 18),
2828 $cx, 18);
6e90668e 2829 } else {
9d2c6865 2830 return $self->deparse($op->first, $cx);
6e90668e 2831 }
a798dbf2
MB
2832}
2833
6e90668e
SM
2834sub padname {
2835 my $self = shift;
2836 my $targ = shift;
68223ea3 2837 return $self->padname_sv($targ)->PVX;
6e90668e
SM
2838}
2839
2840sub padany {
2841 my $self = shift;
2842 my $op = shift;
2843 return substr($self->padname($op->targ), 1); # skip $/@/%
2844}
2845
2846sub pp_padsv {
2847 my $self = shift;
9d2c6865
SM
2848 my($op, $cx) = @_;
2849 return $self->maybe_my($op, $cx, $self->padname($op->targ));
6e90668e
SM
2850}
2851
2852sub pp_padav { pp_padsv(@_) }
2853sub pp_padhv { pp_padsv(@_) }
2854
e0ab66ad 2855my @threadsv_names = B::threadsv_names;
f6f9bdb7
SM
2856sub pp_threadsv {
2857 my $self = shift;
9d2c6865
SM
2858 my($op, $cx) = @_;
2859 return $self->maybe_local($op, $cx, "\$" . $threadsv_names[$op->targ]);
d989cdac 2860}
f6f9bdb7 2861
6f611a1a 2862sub gv_or_padgv {
18228111
GS
2863 my $self = shift;
2864 my $op = shift;
6f611a1a
GS
2865 if (class($op) eq "PADOP") {
2866 return $self->padval($op->padix);
2867 } else { # class($op) eq "SVOP"
2868 return $op->gv;
18228111 2869 }
18228111
GS
2870}
2871
6e90668e
SM
2872sub pp_gvsv {
2873 my $self = shift;
9d2c6865 2874 my($op, $cx) = @_;
6f611a1a 2875 my $gv = $self->gv_or_padgv($op);
8510e997
RH
2876 return $self->maybe_local($op, $cx, $self->stash_variable("\$",
2877 $self->gv_name($gv)));
6e90668e
SM
2878}
2879
2880sub pp_gv {
2881 my $self = shift;
9d2c6865 2882 my($op, $cx) = @_;
6f611a1a 2883 my $gv = $self->gv_or_padgv($op);
18228111 2884 return $self->gv_name($gv);
6e90668e
SM
2885}
2886
2887sub pp_aelemfast {
2888 my $self = shift;
9d2c6865 2889 my($op, $cx) = @_;
6a077020
DM
2890 my $name;
2891 if ($op->flags & OPf_SPECIAL) { # optimised PADAV
2892 $name = $self->padname($op->targ);
2893 $name =~ s/^@/\$/;
2894 }
2895 else {
2896 my $gv = $self->gv_or_padgv($op);
2897 $name = $self->gv_name($gv);
2898 $name = $self->{'curstash'}."::$name"
2899 if $name !~ /::/ && $self->lex_in_scope('@'.$name);
2900 $name = '$' . $name;
2901 }
ce4e655d 2902
6a077020 2903 return $name . "[" . ($op->private + $self->{'arybase'}) . "]";
6e90668e
SM
2904}
2905
2906sub rv2x {
2907 my $self = shift;
9d2c6865 2908 my($op, $cx, $type) = @_;
90c0eb26
RH
2909
2910 if (class($op) eq 'NULL' || !$op->can("first")) {
ff97752d 2911 carp("Unexpected op in pp_rv2x");
90c0eb26
RH
2912 return 'XXX';
2913 }
6e90668e 2914 my $kid = $op->first;
d989cdac
SM
2915 if ($kid->name eq "gv") {
2916 return $self->stash_variable($type, $self->deparse($kid, 0));
2917 } elsif (is_scalar $kid) {
2918 my $str = $self->deparse($kid, 0);
2919 if ($str =~ /^\$([^\w\d])\z/) {
2920 # "$$+" isn't a legal way to write the scalar dereference
2921 # of $+, since the lexer can't tell you aren't trying to
2922 # do something like "$$ + 1" to get one more than your
2923 # PID. Either "${$+}" or "$${+}" are workable
2924 # disambiguations, but if the programmer did the former,
2925 # they'd be in the "else" clause below rather than here.
2926 # It's not clear if this should somehow be unified with
2927 # the code in dq and re_dq that also adds lexer
2928 # disambiguation braces.
2929 $str = '$' . "{$1}"; #'
2930 }
2931 return $type . $str;
2932 } else {
2933 return $type . "{" . $self->deparse($kid, 0) . "}";
2934 }
6e90668e
SM
2935}
2936
2937sub pp_rv2sv { maybe_local(@_, rv2x(@_, "\$")) }
2938sub pp_rv2hv { maybe_local(@_, rv2x(@_, "%")) }
2939sub pp_rv2gv { maybe_local(@_, rv2x(@_, "*")) }
2940
2941# skip rv2av
2942sub pp_av2arylen {
2943 my $self = shift;
9d2c6865 2944 my($op, $cx) = @_;
3f872cb9 2945 if ($op->first->name eq "padav") {
9d2c6865 2946 return $self->maybe_local($op, $cx, '$#' . $self->padany($op->first));
6e90668e 2947 } else {
f5aa8f4e
SM
2948 return $self->maybe_local($op, $cx,
2949 $self->rv2x($op->first, $cx, '$#'));
6e90668e
SM
2950 }
2951}
2952
2953# skip down to the old, ex-rv2cv
90c0eb26
RH
2954sub pp_rv2cv {
2955 my ($self, $op, $cx) = @_;
2956 if (!null($op->first) && $op->first->name eq 'null' &&
2957 $op->first->targ eq OP_LIST)
2958 {
2959 return $self->rv2x($op->first->first->sibling, $cx, "&")
2960 }
2961 else {
2962 return $self->rv2x($op, $cx, "")
2963 }
2964}
6e90668e 2965
d989cdac
SM
2966sub list_const {
2967 my $self = shift;
2968 my($cx, @list) = @_;
2969 my @a = map $self->const($_, 6), @list;
2970 if (@a == 0) {
2971 return "()";
2972 } elsif (@a == 1) {
2973 return $a[0];
2974 } elsif ( @a > 2 and !grep(!/^-?\d+$/, @a)) {
2975 # collapse (-1,0,1,2) into (-1..2)
2976 my ($s, $e) = @a[0,-1];
2977 my $i = $s;
2978 return $self->maybe_parens("$s..$e", $cx, 9)
2979 unless grep $i++ != $_, @a;
2980 }
2981 return $self->maybe_parens(join(", ", @a), $cx, 6);
2982}
2983
6e90668e
SM
2984sub pp_rv2av {
2985 my $self = shift;
9d2c6865 2986 my($op, $cx) = @_;
6e90668e 2987 my $kid = $op->first;
3f872cb9 2988 if ($kid->name eq "const") { # constant list
18228111 2989 my $av = $self->const_sv($kid);
d989cdac 2990 return $self->list_const($cx, $av->ARRAY);
6e90668e 2991 } else {
9d2c6865 2992 return $self->maybe_local($op, $cx, $self->rv2x($op, $cx, "\@"));
6e90668e
SM
2993 }
2994 }
2995
3ed82cfc
GS
2996sub is_subscriptable {
2997 my $op = shift;
2998 if ($op->name =~ /^[ahg]elem/) {
2999 return 1;
3000 } elsif ($op->name eq "entersub") {
3001 my $kid = $op->first;
3002 return 0 unless null $kid->sibling;
3003 $kid = $kid->first;
3004 $kid = $kid->sibling until null $kid->sibling;
3005 return 0 if is_scope($kid);
3006 $kid = $kid->first;
3007 return 0 if $kid->name eq "gv";
3008 return 0 if is_scalar($kid);
3009 return is_subscriptable($kid);
3010 } else {
3011 return 0;
3012 }
3013}
6e90668e 3014
21b7468a
BL
3015sub elem_or_slice_array_name
3016{
6e90668e 3017 my $self = shift;
21b7468a
BL
3018 my ($array, $left, $padname, $allow_arrow) = @_;
3019
3f872cb9 3020 if ($array->name eq $padname) {
21b7468a 3021 return $self->padany($array);
6e90668e 3022 } elsif (is_scope($array)) { # ${expr}[0]
21b7468a 3023 return "{" . $self->deparse($array, 0) . "}";
ce4e655d
RH
3024 } elsif ($array->name eq "gv") {
3025 $array = $self->gv_name($self->gv_or_padgv($array));
3026 if ($array !~ /::/) {
3027 my $prefix = ($left eq '[' ? '@' : '%');
3028 $array = $self->{curstash}.'::'.$array
3029 if $self->lex_in_scope($prefix . $array);
3030 }
21b7468a
BL
3031 return $array;
3032 } elsif (!$allow_arrow || is_scalar $array) { # $x[0], $$x[0], ...
3033 return $self->deparse($array, 24);
6e90668e 3034 } else {
21b7468a 3035 return undef;
6e90668e 3036 }
21b7468a
BL
3037}
3038
3039sub elem_or_slice_single_index
3040{
3041 my $self = shift;
3042 my ($idx) = @_;
3043
9d2c6865 3044 $idx = $self->deparse($idx, 1);
7a9b44b9
RH
3045
3046 # Outer parens in an array index will confuse perl
3047 # if we're interpolating in a regular expression, i.e.
3048 # /$x$foo[(-1)]/ is *not* the same as /$x$foo[-1]/
3049 #
3050 # If $self->{parens}, then an initial '(' will
3051 # definitely be paired with a final ')'. If
3052 # !$self->{parens}, the misleading parens won't
3053 # have been added in the first place.
3054 #
3055 # [You might think that we could get "(...)...(...)"
3056 # where the initial and final parens do not match
3057 # each other. But we can't, because the above would
3058 # only happen if there's an infix binop between the
3059 # two pairs of parens, and *that* means that the whole
3060 # expression would be parenthesized as well.]
3061 #
3062 $idx =~ s/^\((.*)\)$/$1/ if $self->{'parens'};
3063
098251bc
RH
3064 # Hash-element braces will autoquote a bareword inside themselves.
3065 # We need to make sure that C<$hash{warn()}> doesn't come out as
3066 # C<$hash{warn}>, which has a quite different meaning. Currently
3067 # B::Deparse will always quote strings, even if the string was a
3068 # bareword in the original (i.e. the OPpCONST_BARE flag is ignored
3069 # for constant strings.) So we can cheat slightly here - if we see
3070 # a bareword, we know that it is supposed to be a function call.
3071 #
3072 $idx =~ s/^([A-Za-z_]\w*)$/$1()/;
3073
21b7468a
BL
3074 return $idx;
3075}
3076
3077sub elem {
3078 my $self = shift;
3079 my ($op, $cx, $left, $right, $padname) = @_;
3080 my($array, $idx) = ($op->first, $op->first->sibling);
3081
3082 $idx = $self->elem_or_slice_single_index($idx);
3083
3084 unless ($array->name eq $padname) { # Maybe this has been fixed
3085 $array = $array->first; # skip rv2av (or ex-rv2av in _53+)
3086 }
3087 if (my $array_name=$self->elem_or_slice_array_name
3088 ($array, $left, $padname, 1)) {
3089 return "\$" . $array_name . $left . $idx . $right;
3090 } else {
3091 # $x[20][3]{hi} or expr->[20]
3092 my $arrow = is_subscriptable($array) ? "" : "->";
3093 return $self->deparse($array, 24) . $arrow . $left . $idx . $right;
3094 }
3095
6e90668e
SM
3096}
3097
3f872cb9
GS
3098sub pp_aelem { maybe_local(@_, elem(@_, "[", "]", "padav")) }
3099sub pp_helem { maybe_local(@_, elem(@_, "{", "}", "padhv")) }
6e90668e
SM
3100
3101sub pp_gelem {
3102 my $self = shift;
9d2c6865 3103 my($op, $cx) = @_;
6e90668e
SM
3104 my($glob, $part) = ($op->first, $op->last);
3105 $glob = $glob->first; # skip rv2gv
3f872cb9 3106 $glob = $glob->first if $glob->name eq "rv2gv"; # this one's a bug
9d2c6865
SM
3107 my $scope = is_scope($glob);
3108 $glob = $self->deparse($glob, 0);
3109 $part = $self->deparse($part, 1);
6e90668e
SM
3110 return "*" . ($scope ? "{$glob}" : $glob) . "{$part}";
3111}
3112
3113sub slice {
3114 my $self = shift;
9d2c6865 3115 my ($op, $cx, $left, $right, $regname, $padname) = @_;
6e90668e
SM
3116 my $last;
3117 my(@elems, $kid, $array, $list);
3118 if (class($op) eq "LISTOP") {
3119 $last = $op->last;
3120 } else { # ex-hslice inside delete()
3121 for ($kid = $op->first; !null $kid->sibling; $kid = $kid->sibling) {}
3122 $last = $kid;
3123 }
3124 $array = $last;
3125 $array = $array->first
3f872cb9 3126 if $array->name eq $regname or $array->name eq "null";
21b7468a 3127 $array = $self->elem_or_slice_array_name($array,$left,$padname,0);
6e90668e 3128 $kid = $op->first->sibling; # skip pushmark
3f872cb9 3129 if ($kid->name eq "list") {
6e90668e
SM
3130 $kid = $kid->first->sibling; # skip list, pushmark
3131 for (; !null $kid; $kid = $kid->sibling) {
9d2c6865 3132 push @elems, $self->deparse($kid, 6);
6e90668e
SM
3133 }
3134 $list = join(", ", @elems);
3135 } else {
21b7468a 3136 $list = $self->elem_or_slice_single_index($kid);
6e90668e
SM
3137 }
3138 return "\@" . $array . $left . $list . $right;
3139}
3140
3ed82cfc
GS
3141sub pp_aslice { maybe_local(@_, slice(@_, "[", "]", "rv2av", "padav")) }
3142sub pp_hslice { maybe_local(@_, slice(@_, "{", "}", "rv2hv", "padhv")) }
6e90668e
SM
3143
3144sub pp_lslice {
3145 my $self = shift;
9d2c6865 3146 my($op, $cx) = @_;
6e90668e
SM
3147 my $idx = $op->first;
3148 my $list = $op->last;
3149 my(@elems, $kid);
9d2c6865
SM
3150 $list = $self->deparse($list, 1);
3151 $idx = $self->deparse($idx, 1);
3152 return "($list)" . "[$idx]";
6e90668e
SM
3153}
3154
6e90668e
SM
3155sub want_scalar {
3156 my $op = shift;
3157 return ($op->flags & OPf_WANT) == OPf_WANT_SCALAR;
3158}
3159
bd0865ec
GS
3160sub want_list {
3161 my $op = shift;
3162 return ($op->flags & OPf_WANT) == OPf_WANT_LIST;
3163}
3164
09d856fb 3165sub _method {
6e90668e 3166 my $self = shift;
9d2c6865 3167 my($op, $cx) = @_;
bd0865ec
GS
3168 my $kid = $op->first->sibling; # skip pushmark
3169 my($meth, $obj, @exprs);
3f872cb9 3170 if ($kid->name eq "list" and want_list $kid) {
bd0865ec
GS
3171 # When an indirect object isn't a bareword but the args are in
3172 # parens, the parens aren't part of the method syntax (the LLAFR
3173 # doesn't apply), but they make a list with OPf_PARENS set that
3174 # doesn't get flattened by the append_elem that adds the method,
3175 # making a (object, arg1, arg2, ...) list where the object
d989cdac 3176 # usually is. This can be distinguished from
bd0865ec
GS
3177 # `($obj, $arg1, $arg2)->meth()' (which is legal if $arg2 is an
3178 # object) because in the later the list is in scalar context
3179 # as the left side of -> always is, while in the former
3180 # the list is in list context as method arguments always are.
3181 # (Good thing there aren't method prototypes!)
3ed82cfc 3182 $meth = $kid->sibling;
bd0865ec
GS
3183 $kid = $kid->first->sibling; # skip pushmark
3184 $obj = $kid;
6e90668e 3185 $kid = $kid->sibling;
bd0865ec 3186 for (; not null $kid; $kid = $kid->sibling) {
09d856fb 3187 push @exprs, $kid;
6e90668e 3188 }
bd0865ec
GS
3189 } else {
3190 $obj = $kid;
3191 $kid = $kid->sibling;
90c0eb26
RH
3192 for (; !null ($kid->sibling) && $kid->name ne "method_named";
3193 $kid = $kid->sibling) {
09d856fb 3194 push @exprs, $kid
6e90668e 3195 }
3ed82cfc 3196 $meth = $kid;
bd0865ec 3197 }
09d856fb 3198
3ed82cfc 3199 if ($meth->name eq "method_named") {
18228111 3200 $meth = $self->const_sv($meth)->PV;
bd0865ec 3201 } else {
3ed82cfc
GS
3202 $meth = $meth->first;
3203 if ($meth->name eq "const") {
3204 # As of 5.005_58, this case is probably obsoleted by the
3205 # method_named case above
18228111 3206 $meth = $self->const_sv($meth)->PV; # needs to be bare
3ed82cfc 3207 }
bd0865ec 3208 }
09d856fb
CK
3209
3210 return { method => $meth, variable_method => ref($meth),
3211 object => $obj, args => \@exprs };
3212}
3213
3214# compat function only
3215sub method {
3216 my $self = shift;
3217 my $info = $self->_method(@_);
3218 return $self->e_method( $self->_method(@_) );
3219}
3220
3221sub e_method {
3222 my ($self, $info) = @_;
3223 my $obj = $self->deparse($info->{object}, 24);
3224
3225 my $meth = $info->{method};
3226 $meth = $self->deparse($meth, 1) if $info->{variable_method};
3227 my $args = join(", ", map { $self->deparse($_, 6) } @{$info->{args}} );
3228 my $kid = $obj . "->" . $meth;
145eb477 3229 if (length $args) {
bd0865ec
GS
3230 return $kid . "(" . $args . ")"; # parens mandatory
3231 } else {
3232 return $kid;
3233 }
3234}
3235
3236# returns "&" if the prototype doesn't match the args,
3237# or ("", $args_after_prototype_demunging) if it does.
3238sub check_proto {
3239 my $self = shift;
acaaef34 3240 return "&" if $self->{'noproto'};
bd0865ec
GS
3241 my($proto, @args) = @_;
3242 my($arg, $real);
3243 my $doneok = 0;
3244 my @reals;
3245 # An unbackslashed @ or % gobbles up the rest of the args
2ae48fff 3246 1 while $proto =~ s/(?<!\\)([@%])[^\]]+$/$1/;
bd0865ec 3247 while ($proto) {
21b52158 3248 $proto =~ s/^(\\?[\$\@&%*_]|\\\[[\$\@&%*]+\]|;)//;
bd0865ec
GS
3249 my $chr = $1;
3250 if ($chr eq "") {
3251 return "&" if @args;
3252 } elsif ($chr eq ";") {
3253 $doneok = 1;
3254 } elsif ($chr eq "@" or $chr eq "%") {
3255 push @reals, map($self->deparse($_, 6), @args);
3256 @args = ();
6e90668e 3257 } else {
bd0865ec
GS
3258 $arg = shift @args;
3259 last unless $arg;
21b52158 3260 if ($chr eq "\$" || $chr eq "_") {
bd0865ec
GS
3261 if (want_scalar $arg) {
3262 push @reals, $self->deparse($arg, 6);
3263 } else {
3264 return "&";
3265 }
3266 } elsif ($chr eq "&") {
3f872cb9 3267 if ($arg->name =~ /^(s?refgen|undef)$/) {
bd0865ec
GS
3268 push @reals, $self->deparse($arg, 6);
3269 } else {
3270 return "&";
3271 }
3272 } elsif ($chr eq "*") {
3f872cb9
GS
3273 if ($arg->name =~ /^s?refgen$/
3274 and $arg->first->first->name eq "rv2gv")
bd0865ec
GS
3275 {
3276 $real = $arg->first->first; # skip refgen, null
3f872cb9 3277 if ($real->first->name eq "gv") {
bd0865ec
GS
3278 push @reals, $self->deparse($real, 6);
3279 } else {
3280 push @reals, $self->deparse($real->first, 6);
3281 }
3282 } else {
3283 return "&";
3284 }
3285 } elsif (substr($chr, 0, 1) eq "\\") {
2ae48fff 3286 $chr =~ tr/\\[]//d;
3f872cb9 3287 if ($arg->name =~ /^s?refgen$/ and
bd0865ec 3288 !null($real = $arg->first) and
2ae48fff
RGS
3289 ($chr =~ /\$/ && is_scalar($real->first)
3290 or ($chr =~ /@/
3291 && class($real->first->sibling) ne 'NULL'
3f872cb9
GS
3292 && $real->first->sibling->name
3293 =~ /^(rv2|pad)av$/)
2ae48fff
RGS
3294 or ($chr =~ /%/
3295 && class($real->first->sibling) ne 'NULL'
3f872cb9
GS
3296 && $real->first->sibling->name
3297 =~ /^(rv2|pad)hv$/)
2ae48fff 3298 #or ($chr =~ /&/ # This doesn't work
3f872cb9 3299 # && $real->first->name eq "rv2cv")
2ae48fff 3300 or ($chr =~ /\*/
3f872cb9 3301 && $real->first->name eq "rv2gv")))
bd0865ec
GS
3302 {
3303 push @reals, $self->deparse($real, 6);
3304 } else {
3305 return "&";
3306 }
3307 }
3308 }
9d2c6865 3309 }
bd0865ec
GS
3310 return "&" if $proto and !$doneok; # too few args and no `;'
3311 return "&" if @args; # too many args
3312 return ("", join ", ", @reals);
3313}
3314
3315sub pp_entersub {
3316 my $self = shift;
3317 my($op, $cx) = @_;
09d856fb
CK
3318 return $self->e_method($self->_method($op, $cx))
3319 unless null $op->first->sibling;
bd0865ec
GS
3320 my $prefix = "";
3321 my $amper = "";
3322 my($kid, @exprs);
90c0eb26 3323 if ($op->flags & OPf_SPECIAL && !($op->flags & OPf_MOD)) {
9d2c6865
SM
3324 $prefix = "do ";
3325 } elsif ($op->private & OPpENTERSUB_AMPER) {
3326 $amper = "&";
3327 }
3328 $kid = $op->first;
3329 $kid = $kid->first->sibling; # skip ex-list, pushmark
3330 for (; not null $kid->sibling; $kid = $kid->sibling) {
3331 push @exprs, $kid;
3332 }
bd0865ec
GS
3333 my $simple = 0;
3334 my $proto = undef;
9d2c6865
SM
3335 if (is_scope($kid)) {
3336 $amper = "&";
3337 $kid = "{" . $self->deparse($kid, 0) . "}";
3f872cb9 3338 } elsif ($kid->first->name eq "gv") {
6f611a1a 3339 my $gv = $self->gv_or_padgv($kid->first);
9d2c6865
SM
3340 if (class($gv->CV) ne "SPECIAL") {
3341 $proto = $gv->CV->PV if $gv->CV->FLAGS & SVf_POK;
3342 }
bd0865ec 3343 $simple = 1; # only calls of named functions can be prototyped
9d2c6865 3344 $kid = $self->deparse($kid, 24);
8b2d6640
FC
3345 if (!$amper) {
3346 if ($kid eq 'main::') {
3347 $kid = '::';
3348 } elsif ($kid !~ /^(?:\w|::)(?:[\w\d]|::(?!\z))*\z/) {
3349 $kid = single_delim("q", "'", $kid) . '->';
3350 }
3351 }
90c0eb26 3352 } elsif (is_scalar ($kid->first) && $kid->first->name ne 'rv2cv') {
9d2c6865
SM
3353 $amper = "&";
3354 $kid = $self->deparse($kid, 24);
3355 } else {
3356 $prefix = "";
3ed82cfc
GS
3357 my $arrow = is_subscriptable($kid->first) ? "" : "->";
3358 $kid = $self->deparse($kid, 24) . $arrow;
9d2c6865 3359 }
0ca62a8e
RH
3360
3361 # Doesn't matter how many prototypes there are, if
3362 # they haven't happened yet!
1d38190f
RGS
3363 my $declared;
3364 {
3365 no strict 'refs';
3366 no warnings 'uninitialized';
3367 $declared = exists $self->{'subs_declared'}{$kid}
d989cdac 3368 || (
840378f5 3369 defined &{ ${$self->{'curstash'}."::"}{$kid} }
1d38190f
RGS
3370 && !exists
3371 $self->{'subs_deparsed'}{$self->{'curstash'}."::".$kid}
3372 && defined prototype $self->{'curstash'}."::".$kid
3373 );
3374 if (!$declared && defined($proto)) {
3375 # Avoid "too early to check prototype" warning
3376 ($amper, $proto) = ('&');
3377 }
e99ebc55 3378 }
0ca62a8e 3379
bd0865ec 3380 my $args;
0ca62a8e 3381 if ($declared and defined $proto and not $amper) {
bd0865ec
GS
3382 ($amper, $args) = $self->check_proto($proto, @exprs);
3383 if ($amper eq "&") {
9d2c6865
SM
3384 $args = join(", ", map($self->deparse($_, 6), @exprs));
3385 }
3386 } else {
3387 $args = join(", ", map($self->deparse($_, 6), @exprs));
6e90668e 3388 }
9d2c6865
SM
3389 if ($prefix or $amper) {
3390 if ($op->flags & OPf_STACKED) {
3391 return $prefix . $amper . $kid . "(" . $args . ")";
3392 } else {
3393 return $prefix . $amper. $kid;
3394 }
6e90668e 3395 } else {
34a48b4b 3396 # glob() invocations can be translated into calls of
d1be9408 3397 # CORE::GLOBAL::glob with a second parameter, a number.
34a48b4b
RH
3398 # Reverse this.
3399 if ($kid eq "CORE::GLOBAL::glob") {
3400 $kid = "glob";
3401 $args =~ s/\s*,[^,]+$//;
3402 }
3403
3404 # It's a syntax error to call CORE::GLOBAL::foo without a prefix,
3405 # so it must have been translated from a keyword call. Translate
3406 # it back.
3407 $kid =~ s/^CORE::GLOBAL:://;
3408
d989cdac 3409 my $dproto = defined($proto) ? $proto : "undefined";
0ca62a8e
RH
3410 if (!$declared) {
3411 return "$kid(" . $args . ")";
d989cdac 3412 } elsif ($dproto eq "") {
9d2c6865 3413 return $kid;
d989cdac
SM
3414 } elsif ($dproto eq "\$" and is_scalar($exprs[0])) {
3415 # is_scalar is an excessively conservative test here:
3416 # really, we should be comparing to the precedence of the
3417 # top operator of $exprs[0] (ala unop()), but that would
3418 # take some major code restructuring to do right.
9d2c6865 3419 return $self->maybe_parens_func($kid, $args, $cx, 16);
d989cdac 3420 } elsif ($dproto ne '$' and defined($proto) || $simple) { #'
9d2c6865
SM
3421 return $self->maybe_parens_func($kid, $args, $cx, 5);
3422 } else {
3423 return "$kid(" . $args . ")";
3424 }
6e90668e
SM
3425 }
3426}
3427
3428sub pp_enterwrite { unop(@_, "write") }
3429
3430# escape things that cause interpolation in double quotes,
3431# but not character escapes
3432sub uninterp {
3433 my($str) = @_;
3f766ba3 3434 $str =~ s/(^|\G|[^\\])((?:\\\\)*)([\$\@]|\\[uUlLQE])/$1$2\\$3/g;
9d2c6865
SM
3435 return $str;
3436}
3437
b7dad2dc
RH
3438{
3439my $bal;
3440BEGIN {
cdf8218f
RH
3441 use re "eval";
3442 # Matches any string which is balanced with respect to {braces}
b7dad2dc 3443 $bal = qr(
cdf8218f
RH
3444 (?:
3445 [^\\{}]
3446 | \\\\
3447 | \\[{}]
3448 | \{(??{$bal})\}
3449 )*
3450 )x;
b7dad2dc
RH
3451}
3452
3453# the same, but treat $|, $), $( and $ at the end of the string differently
3454sub re_uninterp {
3455 my($str) = @_;
cdf8218f
RH
3456
3457 $str =~ s/
3458 ( ^|\G # $1
3459 | [^\\]
3460 )
3461
3462 ( # $2
3463 (?:\\\\)*
3464 )
3465
3466 ( # $3
3467 (\(\?\??\{$bal\}\)) # $4
3468 | [\$\@]
3469 (?!\||\)|\(|$)
3470 | \\[uUlLQE]
3471 )
3472
2621462b 3473 /defined($4) && length($4) ? "$1$2$4" : "$1$2\\$3"/xeg;
cdf8218f 3474
6e90668e
SM
3475 return $str;
3476}
3477
b7dad2dc
RH
3478# This is for regular expressions with the /x modifier
3479# We have to leave comments unmangled.
a9760014 3480sub re_uninterp_extended {
b7dad2dc
RH
3481 my($str) = @_;
3482
3483 $str =~ s/
3484 ( ^|\G # $1
3485 | [^\\]
3486 )
3487
3488 ( # $2
3489 (?:\\\\)*
3490 )
3491
3492 ( # $3
3493 ( \(\?\??\{$bal\}\) # $4 (skip over (?{}) and (??{}) blocks)
3494 | \#[^\n]* # (skip over comments)
3495 )
3496 | [\$\@]
9a58b761 3497 (?!\||\)|\(|$|\s)
b7dad2dc
RH
3498 | \\[uUlLQE]
3499 )
3500
c7de4c66 3501 /defined($4) && length($4) ? "$1$2$4" : "$1$2\\$3"/xeg;
b7dad2dc 3502
a9760014
RH
3503 return $str;
3504}