This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
Deparse crashed on argless sort()
[perl5.git] / dist / B-Deparse / Deparse.pm
CommitLineData
6e90668e 1# B::Deparse.pm
4ca8de37
SM
2# Copyright (c) 1998-2000, 2002, 2003, 2004, 2005, 2006 Stephen McCamant.
3# All rights reserved.
6e90668e
SM
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
e1dccc0d 17 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
ff0cf12f 22 PMf_MULTILINE PMf_SINGLELINE PMf_FOLD PMf_EXTENDED);
a3011959 23$VERSION = '1.18';
a798dbf2 24use strict;
2ae48fff 25use vars qw/$AUTOLOAD/;
34a48b4b 26use warnings ();
149758b3 27require feature;
a798dbf2 28
aa381260 29BEGIN {
ff0cf12f 30 # List version-specific constants here.
2be95ceb
NC
31 # Easiest way to keep this code portable between version looks to
32 # be to fake up a dummy constant that will never actually be true.
33 foreach (qw(OPpSORT_INPLACE OPpSORT_DESCEND OPpITER_REVERSED OPpCONST_NOVER
ff0cf12f 34 OPpPAD_STATE PMf_SKIPWHITE RXf_SKIPWHITE
b9bc576f 35 RXf_PMf_CHARSET RXf_PMf_KEEPCOPY
24fcb59f 36 CVf_LOCKED OPpREVERSE_INPLACE OPpSUBSTR_REPL_FIRST
7d789282 37 PMf_NONDESTRUCT OPpCONST_ARYBASE OPpEVAL_BYTES)) {
ff0cf12f 38 eval { import B $_ };
2be95ceb
NC
39 no strict 'refs';
40 *{$_} = sub () {0} unless *{$_}{CODE};
41 }
aa381260
NC
42}
43
6e90668e
SM
44# Changes between 0.50 and 0.51:
45# - fixed nulled leave with live enter in sort { }
46# - fixed reference constants (\"str")
47# - handle empty programs gracefully
c4a6f826 48# - handle infinite loops (for (;;) {}, while (1) {})
e38ccfd9 49# - differentiate between 'for my $x ...' and 'my $x; for $x ...'
6e90668e
SM
50# - various minor cleanups
51# - moved globals into an object
e38ccfd9 52# - added '-u', like B::C
6e90668e
SM
53# - package declarations using cop_stash
54# - subs, formats and code sorted by cop_seq
f6f9bdb7 55# Changes between 0.51 and 0.52:
4d1ff10f 56# - added pp_threadsv (special variables under USE_5005THREADS)
f6f9bdb7 57# - added documentation
bd0865ec 58# Changes between 0.52 and 0.53:
9d2c6865 59# - many changes adding precedence contexts and associativity
e38ccfd9 60# - added '-p' and '-s' output style options
9d2c6865 61# - various other minor fixes
bd0865ec 62# Changes between 0.53 and 0.54:
e38ccfd9 63# - added support for new 'for (1..100)' optimization,
d7f5b6da 64# thanks to Gisle Aas
bd0865ec 65# Changes between 0.54 and 0.55:
90be192f
SM
66# - added support for new qr// construct
67# - added support for new pp_regcreset OP
bd0865ec 68# Changes between 0.55 and 0.56:
f5aa8f4e
SM
69# - tested on base/*.t, cmd/*.t, comp/*.t, io/*.t
70# - fixed $# on non-lexicals broken in last big rewrite
71# - added temporary fix for change in opcode of OP_STRINGIFY
e38ccfd9 72# - fixed problem in 0.54's for() patch in 'for (@ary)'
f5aa8f4e 73# - fixed precedence in conditional of ?:
e38ccfd9 74# - tweaked list paren elimination in 'my($x) = @_'
f5aa8f4e
SM
75# - made continue-block detection trickier wrt. null ops
76# - fixed various prototype problems in pp_entersub
77# - added support for sub prototypes that never get GVs
78# - added unquoting for special filehandle first arg in truncate
e38ccfd9 79# - print doubled rv2gv (a bug) as '*{*GV}' instead of illegal '**GV'
f5aa8f4e 80# - added semicolons at the ends of blocks
e38ccfd9 81# - added -l '#line' declaration option -- fixes cmd/subval.t 27,28
bd0865ec
GS
82# Changes between 0.56 and 0.561:
83# - fixed multiply-declared my var in pp_truncate (thanks to Sarathy)
84# - used new B.pm symbolic constants (done by Nick Ing-Simmons)
85# Changes between 0.561 and 0.57:
86# - stylistic changes to symbolic constant stuff
87# - handled scope in s///e replacement code
88# - added unquote option for expanding "" into concats, etc.
89# - split method and proto parts of pp_entersub into separate functions
90# - various minor cleanups
f4a44678
SM
91# Changes after 0.57:
92# - added parens in \&foo (patch by Albert Dvornik)
93# Changes between 0.57 and 0.58:
e38ccfd9 94# - fixed '0' statements that weren't being printed
f4a44678
SM
95# - added methods for use from other programs
96# (based on patches from James Duncan and Hugo van der Sanden)
97# - added -si and -sT to control indenting (also based on a patch from Hugo)
98# - added -sv to print something else instead of '???'
99# - preliminary version of utf8 tr/// handling
3ed82cfc
GS
100# Changes after 0.58:
101# - uses of $op->ppaddr changed to new $op->name (done by Sarathy)
d989cdac 102# - added support for Hugo's new OP_SETSTATE (like nextstate)
3ed82cfc
GS
103# Changes between 0.58 and 0.59
104# - added support for Chip's OP_METHOD_NAMED
105# - added support for Ilya's OPpTARGET_MY optimization
e38ccfd9 106# - elided arrows before '()' subscripts when possible
58cccf98 107# Changes between 0.59 and 0.60
c4a6f826 108# - support for method attributes was added
58cccf98
SM
109# - some warnings fixed
110# - separate recognition of constant subs
c4a6f826 111# - rewrote continue block handling, now recognizing for loops
58cccf98 112# - added more control of expanding control structures
c7f67cde
RH
113# Changes between 0.60 and 0.61 (mostly by Robin Houston)
114# - many bug-fixes
115# - support for pragmas and 'use'
116# - support for the little-used $[ variable
117# - support for __DATA__ sections
118# - UTF8 support
119# - BEGIN, CHECK, INIT and END blocks
120# - scoping of subroutine declarations fixed
121# - compile-time output from the input program can be suppressed, so that the
122# output is just the deparsed code. (a change to O.pm in fact)
123# - our() declarations
124# - *all* the known bugs are now listed in the BUGS section
125# - comprehensive test mechanism (TEST -deparse)
9a58b761
RGS
126# Changes between 0.62 and 0.63 (mostly by Rafael Garcia-Suarez)
127# - bug-fixes
128# - new switch -P
129# - support for command-line switches (-l, -0, etc.)
d989cdac
SM
130# Changes between 0.63 and 0.64
131# - support for //, CHECK blocks, and assertions
132# - improved handling of foreach loops and lexicals
133# - option to use Data::Dumper for constants
134# - more bug fixes
135# - discovered lots more bugs not yet fixed
0d863452
RH
136#
137# ...
138#
139# Changes between 0.72 and 0.73
140# - support new switch constructs
6e90668e
SM
141
142# Todo:
2a9e2f8a
RH
143# (See also BUGS section at the end of this file)
144#
f4a44678
SM
145# - finish tr/// changes
146# - add option for even more parens (generalize \&foo change)
90be192f 147# - left/right context
58cccf98 148# - copy comments (look at real text with $^P?)
f5aa8f4e 149# - avoid semis in one-statement blocks
9d2c6865 150# - associativity of &&=, ||=, ?:
6e90668e
SM
151# - ',' => '=>' (auto-unquote?)
152# - break long lines ("\r" as discretionary break?)
f4a44678
SM
153# - configurable syntax highlighting: ANSI color, HTML, TeX, etc.
154# - more style options: brace style, hex vs. octal, quotes, ...
155# - print big ints as hex/octal instead of decimal (heuristic?)
e38ccfd9 156# - handle 'my $x if 0'?
6e90668e
SM
157# - version using op_next instead of op_first/sibling?
158# - avoid string copies (pass arrays, one big join?)
9d2c6865 159# - here-docs?
6e90668e 160
d989cdac 161# Current test.deparse failures
d989cdac
SM
162# comp/hints 6 - location of BEGIN blocks wrt. block openings
163# run/switchI 1 - missing -I switches entirely
164# perl -Ifoo -e 'print @INC'
165# op/caller 2 - warning mask propagates backwards before warnings::register
166# 'use warnings; BEGIN {${^WARNING_BITS} eq "U"x12;} use warnings::register'
167# op/getpid 2 - can't assign to shared my() declaration (threads only)
168# 'my $x : shared = 5'
c4a6f826 169# op/override 7 - parens on overridden require change v-string interpretation
d989cdac
SM
170# 'BEGIN{*CORE::GLOBAL::require=sub {}} require v5.6'
171# c.f. 'BEGIN { *f = sub {0} }; f 2'
172# op/pat 774 - losing Unicode-ness of Latin1-only strings
173# 'use charnames ":short"; $x="\N{latin:a with acute}"'
174# op/recurse 12 - missing parens on recursive call makes it look like method
175# 'sub f { f($x) }'
176# op/subst 90 - inconsistent handling of utf8 under "use utf8"
177# op/taint 29 - "use re 'taint'" deparsed in the wrong place wrt. block open
178# op/tiehandle compile - "use strict" deparsed in the wrong place
179# uni/tr_ several
180# ext/B/t/xref 11 - line numbers when we add newlines to one-line subs
181# ext/Data/Dumper/t/dumper compile
182# ext/DB_file/several
183# ext/Encode/several
184# ext/Ernno/Errno warnings
185# ext/IO/lib/IO/t/io_sel 23
186# ext/PerlIO/t/encoding compile
187# ext/POSIX/t/posix 6
188# ext/Socket/Socket 8
189# ext/Storable/t/croak compile
190# lib/Attribute/Handlers/t/multi compile
191# lib/bignum/ several
192# lib/charnames 35
193# lib/constant 32
194# lib/English 40
195# lib/ExtUtils/t/bytes 4
196# lib/File/DosGlob compile
197# lib/Filter/Simple/t/data 1
198# lib/Math/BigInt/t/constant 1
199# lib/Net/t/config Deparse-warning
200# lib/overload compile
201# lib/Switch/ several
202# lib/Symbol 4
203# lib/Test/Simple several
204# lib/Term/Complete
205# lib/Tie/File/t/29_downcopy 5
206# lib/vars 22
f5aa8f4e 207
6e90668e
SM
208# Object fields (were globals):
209#
210# avoid_local:
211# (local($a), local($b)) and local($a, $b) have the same internal
212# representation but the short form looks better. We notice we can
213# use a large-scale local when checking the list, but need to prevent
d989cdac 214# individual locals too. This hash holds the addresses of OPs that
6e90668e
SM
215# have already had their local-ness accounted for. The same thing
216# is done with my().
217#
218# curcv:
219# CV for current sub (or main program) being deparsed
220#
8510e997 221# curcvlex:
415d4c68
FC
222# Cached hash of lexical variables for curcv: keys are
223# names prefixed with "m" or "o" (representing my/our), and
8510e997
RH
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#
6e90668e
SM
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
6e90668e
SM
235# want to deparse
236#
f5aa8f4e
SM
237# protos_todo:
238# as above, but [name, prototype] for subs that never got a GV
239#
6e90668e
SM
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.
4a1ac32e
FC
246# That means we can omit parentheses from the arguments. It also means we
247# need to put CORE:: on core functions of the same name.
0ca62a8e 248#
1d38190f
RGS
249# subs_deparsed
250# Keeps track of fully qualified names of all deparsed subs.
251#
9d2c6865 252# parens: -p
f5aa8f4e 253# linenums: -l
bd0865ec 254# unquote: -q
e38ccfd9 255# cuddle: ' ' or '\n', depending on -sC
f4a44678
SM
256# indent_size: -si
257# use_tabs: -sT
258# ex_const: -sv
9d2c6865
SM
259
260# A little explanation of how precedence contexts and associativity
261# work:
262#
263# deparse() calls each per-op subroutine with an argument $cx (short
264# for context, but not the same as the cx* in the perl core), which is
265# a number describing the op's parents in terms of precedence, whether
f5aa8f4e 266# they're inside an expression or at statement level, etc. (see
9d2c6865
SM
267# chart below). When ops with children call deparse on them, they pass
268# along their precedence. Fractional values are used to implement
e38ccfd9 269# associativity ('($x + $y) + $z' => '$x + $y + $y') and related
9d2c6865
SM
270# parentheses hacks. The major disadvantage of this scheme is that
271# it doesn't know about right sides and left sides, so say if you
272# assign a listop to a variable, it can't tell it's allowed to leave
273# the parens off the listop.
274
275# Precedences:
276# 26 [TODO] inside interpolation context ("")
277# 25 left terms and list operators (leftward)
278# 24 left ->
279# 23 nonassoc ++ --
280# 22 right **
281# 21 right ! ~ \ and unary + and -
282# 20 left =~ !~
283# 19 left * / % x
284# 18 left + - .
285# 17 left << >>
286# 16 nonassoc named unary operators
287# 15 nonassoc < > <= >= lt gt le ge
288# 14 nonassoc == != <=> eq ne cmp
289# 13 left &
290# 12 left | ^
291# 11 left &&
292# 10 left ||
293# 9 nonassoc .. ...
294# 8 right ?:
295# 7 right = += -= *= etc.
296# 6 left , =>
297# 5 nonassoc list operators (rightward)
298# 4 right not
299# 3 left and
300# 2 left or xor
301# 1 statement modifiers
d989cdac 302# 0.5 statements, but still print scopes as do { ... }
9d2c6865 303# 0 statement level
93a8ff62 304# -1 format body
9d2c6865
SM
305
306# Nonprinting characters with special meaning:
307# \cS - steal parens (see maybe_parens_unop)
308# \n - newline and indent
309# \t - increase indent
e38ccfd9 310# \b - decrease indent ('outdent')
f5aa8f4e 311# \f - flush left (no indent)
9d2c6865 312# \cK - kill following semicolon, if any
6e90668e
SM
313
314sub null {
315 my $op = shift;
316 return class($op) eq "NULL";
317}
318
319sub todo {
320 my $self = shift;
34a48b4b 321 my($cv, $is_form) = @_;
e31885a0 322 return unless ($cv->FILE eq $0 || exists $self->{files}{$cv->FILE});
6e90668e 323 my $seq;
d989cdac
SM
324 if ($cv->OUTSIDE_SEQ) {
325 $seq = $cv->OUTSIDE_SEQ;
326 } elsif (!null($cv->START) and is_state($cv->START)) {
6e90668e
SM
327 $seq = $cv->START->cop_seq;
328 } else {
329 $seq = 0;
330 }
34a48b4b 331 push @{$self->{'subs_todo'}}, [$seq, $cv, $is_form];
1d38190f
RGS
332 unless ($is_form || class($cv->STASH) eq 'SPECIAL') {
333 $self->{'subs_deparsed'}{$cv->STASH->NAME."::".$cv->GV->NAME} = 1;
334 }
6e90668e
SM
335}
336
337sub next_todo {
338 my $self = shift;
339 my $ent = shift @{$self->{'subs_todo'}};
34a48b4b
RH
340 my $cv = $ent->[1];
341 my $gv = $cv->GV;
342 my $name = $self->gv_name($gv);
6e90668e
SM
343 if ($ent->[2]) {
344 return "format $name =\n"
e31885a0 345 . $self->deparse_format($ent->[1]). "\n";
6e90668e 346 } else {
0ca62a8e 347 $self->{'subs_declared'}{$name} = 1;
34a48b4b
RH
348 if ($name eq "BEGIN") {
349 my $use_dec = $self->begin_is_use($cv);
d989cdac 350 if (defined ($use_dec) and $self->{'expand'} < 5) {
0e7fe0f0
RH
351 return () if 0 == length($use_dec);
352 return $use_dec;
353 }
34a48b4b 354 }
a0035eb8
RH
355 my $l = '';
356 if ($self->{'linenums'}) {
357 my $line = $gv->LINE;
358 my $file = $gv->FILE;
359 $l = "\n\f#line $line \"$file\"\n";
360 }
127212b2
DM
361 my $p = '';
362 if (class($cv->STASH) ne "SPECIAL") {
363 my $stash = $cv->STASH->NAME;
364 if ($stash ne $self->{'curstash'}) {
365 $p = "package $stash;\n";
366 $name = "$self->{'curstash'}::$name" unless $name =~ /::/;
367 $self->{'curstash'} = $stash;
368 }
8b2d6640 369 $name =~ s/^\Q$stash\E::(?!\z|.*::)//;
127212b2
DM
370 }
371 return "${p}${l}sub $name " . $self->deparse_sub($cv);
34a48b4b
RH
372 }
373}
374
375# Return a "use" declaration for this BEGIN block, if appropriate
376sub begin_is_use {
377 my ($self, $cv) = @_;
378 my $root = $cv->ROOT;
80dc0729 379 local @$self{qw'curcv curcvlex'} = ($cv);
34a48b4b
RH
380#require B::Debug;
381#B::walkoptree($cv->ROOT, "debug");
382 my $lineseq = $root->first;
383 return if $lineseq->name ne "lineseq";
384
385 my $req_op = $lineseq->first->sibling;
386 return if $req_op->name ne "require";
387
388 my $module;
389 if ($req_op->first->private & OPpCONST_BARE) {
390 # Actually it should always be a bareword
391 $module = $self->const_sv($req_op->first)->PV;
392 $module =~ s[/][::]g;
393 $module =~ s/.pm$//;
394 }
395 else {
d989cdac 396 $module = $self->const($self->const_sv($req_op->first), 6);
34a48b4b
RH
397 }
398
399 my $version;
400 my $version_op = $req_op->sibling;
401 return if class($version_op) eq "NULL";
402 if ($version_op->name eq "lineseq") {
403 # We have a version parameter; skip nextstate & pushmark
404 my $constop = $version_op->first->next->next;
405
406 return unless $self->const_sv($constop)->PV eq $module;
407 $constop = $constop->sibling;
a58644de 408 $version = $self->const_sv($constop);
d989cdac
SM
409 if (class($version) eq "IV") {
410 $version = $version->int_value;
411 } elsif (class($version) eq "NV") {
412 $version = $version->NV;
413 } elsif (class($version) ne "PVMG") {
414 # Includes PVIV and PVNV
a58644de
RGS
415 $version = $version->PV;
416 } else {
417 # version specified as a v-string
418 $version = 'v'.join '.', map ord, split //, $version->PV;
419 }
34a48b4b
RH
420 $constop = $constop->sibling;
421 return if $constop->name ne "method_named";
422 return if $self->const_sv($constop)->PV ne "VERSION";
423 }
424
425 $lineseq = $version_op->sibling;
426 return if $lineseq->name ne "lineseq";
427 my $entersub = $lineseq->first->sibling;
428 if ($entersub->name eq "stub") {
429 return "use $module $version ();\n" if defined $version;
430 return "use $module ();\n";
431 }
432 return if $entersub->name ne "entersub";
433
434 # See if there are import arguments
435 my $args = '';
436
6ec152c3
RH
437 my $svop = $entersub->first->sibling; # Skip over pushmark
438 return unless $self->const_sv($svop)->PV eq $module;
34a48b4b
RH
439
440 # Pull out the arguments
6ec152c3
RH
441 for ($svop=$svop->sibling; $svop->name ne "method_named";
442 $svop = $svop->sibling) {
34a48b4b 443 $args .= ", " if length($args);
6ec152c3 444 $args .= $self->deparse($svop, 6);
34a48b4b
RH
445 }
446
447 my $use = 'use';
6ec152c3 448 my $method_named = $svop;
34a48b4b
RH
449 return if $method_named->name ne "method_named";
450 my $method_name = $self->const_sv($method_named)->PV;
451
452 if ($method_name eq "unimport") {
453 $use = 'no';
454 }
455
456 # Certain pragmas are dealt with using hint bits,
457 # so we ignore them here
458 if ($module eq 'strict' || $module eq 'integer'
0ced6c29
RGS
459 || $module eq 'bytes' || $module eq 'warnings'
460 || $module eq 'feature') {
34a48b4b
RH
461 return "";
462 }
463
464 if (defined $version && length $args) {
465 return "$use $module $version ($args);\n";
466 } elsif (defined $version) {
467 return "$use $module $version;\n";
468 } elsif (length $args) {
469 return "$use $module ($args);\n";
470 } else {
471 return "$use $module;\n";
6e90668e
SM
472 }
473}
474
6e90668e 475sub stash_subs {
894e98ac 476 my ($self, $pack, $seen) = @_;
34a48b4b
RH
477 my (@ret, $stash);
478 if (!defined $pack) {
479 $pack = '';
480 $stash = \%::;
f5aa8f4e 481 }
34a48b4b
RH
482 else {
483 $pack =~ s/(::)?$/::/;
484 no strict 'refs';
d1dc589d 485 $stash = \%{"main::$pack"};
34a48b4b 486 }
894e98ac
FC
487 return
488 if ($seen ||= {})->{
489 $INC{"overload.pm"} ? overload::StrVal($stash) : $stash
490 }++;
34a48b4b
RH
491 my %stash = svref_2object($stash)->ARRAY;
492 while (my ($key, $val) = each %stash) {
f5aa8f4e
SM
493 my $class = class($val);
494 if ($class eq "PV") {
a0035eb8
RH
495 # Just a prototype. As an ugly but fairly effective way
496 # to find out if it belongs here is to see if the AUTOLOAD
497 # (if any) for the stash was defined in one of our files.
498 my $A = $stash{"AUTOLOAD"};
499 if (defined ($A) && class($A) eq "GV" && defined($A->CV)
500 && class($A->CV) eq "CV") {
501 my $AF = $A->FILE;
502 next unless $AF eq $0 || exists $self->{'files'}{$AF};
503 }
f5aa8f4e 504 push @{$self->{'protos_todo'}}, [$pack . $key, $val->PV];
5b4ee549 505 } elsif ($class eq "IV" && !($val->FLAGS & SVf_ROK)) {
a0035eb8 506 # Just a name. As above.
5b4ee549
NC
507 # But skip proxy constant subroutines, as some form of perl-space
508 # visible code must have created them, be it a use statement, or
509 # some direct symbol-table manipulation code that we will Deparse
a0035eb8
RH
510 my $A = $stash{"AUTOLOAD"};
511 if (defined ($A) && class($A) eq "GV" && defined($A->CV)
512 && class($A->CV) eq "CV") {
513 my $AF = $A->FILE;
514 next unless $AF eq $0 || exists $self->{'files'}{$AF};
515 }
d989cdac 516 push @{$self->{'protos_todo'}}, [$pack . $key, undef];
f5aa8f4e 517 } elsif ($class eq "GV") {
34a48b4b 518 if (class(my $cv = $val->CV) ne "SPECIAL") {
f5aa8f4e 519 next if $self->{'subs_done'}{$$val}++;
e31885a0 520 next if $$val != ${$cv->GV}; # Ignore imposters
8510e997 521 $self->todo($cv, 0);
f5aa8f4e 522 }
e31885a0 523 if (class(my $cv = $val->FORM) ne "SPECIAL") {
f5aa8f4e 524 next if $self->{'forms_done'}{$$val}++;
e31885a0
RH
525 next if $$val != ${$cv->GV}; # Ignore imposters
526 $self->todo($cv, 1);
f5aa8f4e 527 }
34a48b4b 528 if (class($val->HV) ne "SPECIAL" && $key =~ /::$/) {
74cd21ba 529 $self->stash_subs($pack . $key, $seen);
34a48b4b 530 }
6e90668e
SM
531 }
532 }
533}
a798dbf2 534
f5aa8f4e
SM
535sub print_protos {
536 my $self = shift;
537 my $ar;
538 my @ret;
539 foreach $ar (@{$self->{'protos_todo'}}) {
540 my $proto = (defined $ar->[1] ? " (". $ar->[1] . ")" : "");
541 push @ret, "sub " . $ar->[0] . "$proto;\n";
542 }
543 delete $self->{'protos_todo'};
544 return @ret;
545}
546
9d2c6865
SM
547sub style_opts {
548 my $self = shift;
549 my $opts = shift;
550 my $opt;
551 while (length($opt = substr($opts, 0, 1))) {
552 if ($opt eq "C") {
553 $self->{'cuddle'} = " ";
f4a44678
SM
554 $opts = substr($opts, 1);
555 } elsif ($opt eq "i") {
556 $opts =~ s/^i(\d+)//;
557 $self->{'indent_size'} = $1;
558 } elsif ($opt eq "T") {
559 $self->{'use_tabs'} = 1;
560 $opts = substr($opts, 1);
561 } elsif ($opt eq "v") {
562 $opts =~ s/^v([^.]*)(.|$)//;
563 $self->{'ex_const'} = $1;
9d2c6865 564 }
9d2c6865
SM
565 }
566}
567
f4a44678
SM
568sub new {
569 my $class = shift;
570 my $self = bless {}, $class;
f4a44678 571 $self->{'cuddle'} = "\n";
d989cdac
SM
572 $self->{'curcop'} = undef;
573 $self->{'curstash'} = "main";
574 $self->{'ex_const'} = "'???'";
793e2a70 575 $self->{'expand'} = 0;
d989cdac
SM
576 $self->{'files'} = {};
577 $self->{'indent_size'} = 4;
793e2a70
RH
578 $self->{'linenums'} = 0;
579 $self->{'parens'} = 0;
d989cdac
SM
580 $self->{'subs_todo'} = [];
581 $self->{'unquote'} = 0;
582 $self->{'use_dumper'} = 0;
583 $self->{'use_tabs'} = 0;
08c6f5ec 584
bc6b2ef6 585 $self->{'ambient_arybase'} = 0;
e31885a0 586 $self->{'ambient_warnings'} = undef; # Assume no lexical warnings
a0405c92 587 $self->{'ambient_hints'} = 0;
0ced6c29 588 $self->{'ambient_hinthash'} = undef;
08c6f5ec
RH
589 $self->init();
590
f4a44678 591 while (my $arg = shift @_) {
d989cdac
SM
592 if ($arg eq "-d") {
593 $self->{'use_dumper'} = 1;
594 require Data::Dumper;
595 } elsif ($arg =~ /^-f(.*)/) {
34a48b4b 596 $self->{'files'}{$1} = 1;
d989cdac
SM
597 } elsif ($arg eq "-l") {
598 $self->{'linenums'} = 1;
f4a44678
SM
599 } elsif ($arg eq "-p") {
600 $self->{'parens'} = 1;
acaaef34
RGS
601 } elsif ($arg eq "-P") {
602 $self->{'noproto'} = 1;
f4a44678
SM
603 } elsif ($arg eq "-q") {
604 $self->{'unquote'} = 1;
605 } elsif (substr($arg, 0, 2) eq "-s") {
606 $self->style_opts(substr $arg, 2);
58cccf98
SM
607 } elsif ($arg =~ /^-x(\d)$/) {
608 $self->{'expand'} = $1;
f4a44678
SM
609 }
610 }
611 return $self;
612}
613
810aef70
RH
614{
615 # Mask out the bits that L<warnings::register> uses
616 my $WARN_MASK;
617 BEGIN {
618 $WARN_MASK = $warnings::Bits{all} | $warnings::DeadBits{all};
619 }
620 sub WARN_MASK () {
621 return $WARN_MASK;
622 }
34a48b4b
RH
623}
624
08c6f5ec
RH
625# Initialise the contextual information, either from
626# defaults provided with the ambient_pragmas method,
627# or from perl's own defaults otherwise.
628sub init {
629 my $self = shift;
630
bc6b2ef6 631 $self->{'arybase'} = $self->{'ambient_arybase'};
e31885a0
RH
632 $self->{'warnings'} = defined ($self->{'ambient_warnings'})
633 ? $self->{'ambient_warnings'} & WARN_MASK
634 : undef;
d5ec2987 635 $self->{'hints'} = $self->{'ambient_hints'};
e412117e 636 $self->{'hints'} &= 0xFF if $] < 5.009;
0ced6c29 637 $self->{'hinthash'} = $self->{'ambient_hinthash'};
217aba5d
RH
638
639 # also a convenient place to clear out subs_declared
640 delete $self->{'subs_declared'};
08c6f5ec
RH
641}
642
a798dbf2 643sub compile {
6e90668e 644 my(@args) = @_;
d989cdac 645 return sub {
f4a44678 646 my $self = B::Deparse->new(@args);
d2bc402e
RGS
647 # First deparse command-line args
648 if (defined $^I) { # deparse -i
51a5edaf 649 print q(BEGIN { $^I = ).perlstring($^I).qq(; }\n);
d2bc402e
RGS
650 }
651 if ($^W) { # deparse -w
652 print qq(BEGIN { \$^W = $^W; }\n);
653 }
654 if ($/ ne "\n" or defined $O::savebackslash) { # deparse -l and -0
51a5edaf
RGS
655 my $fs = perlstring($/) || 'undef';
656 my $bs = perlstring($O::savebackslash) || 'undef';
d2bc402e
RGS
657 print qq(BEGIN { \$/ = $fs; \$\\ = $bs; }\n);
658 }
34a48b4b 659 my @BEGINs = B::begin_av->isa("B::AV") ? B::begin_av->ARRAY : ();
676456c2
AG
660 my @UNITCHECKs = B::unitcheck_av->isa("B::AV")
661 ? B::unitcheck_av->ARRAY
662 : ();
ece599bd 663 my @CHECKs = B::check_av->isa("B::AV") ? B::check_av->ARRAY : ();
34a48b4b
RH
664 my @INITs = B::init_av->isa("B::AV") ? B::init_av->ARRAY : ();
665 my @ENDs = B::end_av->isa("B::AV") ? B::end_av->ARRAY : ();
676456c2 666 for my $block (@BEGINs, @UNITCHECKs, @CHECKs, @INITs, @ENDs) {
e31885a0 667 $self->todo($block, 0);
34a48b4b
RH
668 }
669 $self->stash_subs();
d989cdac
SM
670 local($SIG{"__DIE__"}) =
671 sub {
672 if ($self->{'curcop'}) {
673 my $cop = $self->{'curcop'};
674 my($line, $file) = ($cop->line, $cop->file);
675 print STDERR "While deparsing $file near line $line,\n";
676 }
677 };
6e90668e 678 $self->{'curcv'} = main_cv;
8510e997 679 $self->{'curcvlex'} = undef;
f5aa8f4e 680 print $self->print_protos;
6e90668e 681 @{$self->{'subs_todo'}} =
f4a44678 682 sort {$a->[0] <=> $b->[0]} @{$self->{'subs_todo'}};
d989cdac 683 print $self->indent($self->deparse_root(main_root)), "\n"
f4a44678 684 unless null main_root;
6e90668e
SM
685 my @text;
686 while (scalar(@{$self->{'subs_todo'}})) {
687 push @text, $self->next_todo;
688 }
6f611a1a 689 print $self->indent(join("", @text)), "\n" if @text;
e31885a0
RH
690
691 # Print __DATA__ section, if necessary
692 no strict 'refs';
96c57f7e
RGS
693 my $laststash = defined $self->{'curcop'}
694 ? $self->{'curcop'}->stash->NAME : $self->{'curstash'};
695 if (defined *{$laststash."::DATA"}{IO}) {
127212b2
DM
696 print "package $laststash;\n"
697 unless $laststash eq $self->{'curstash'};
e31885a0 698 print "__DATA__\n";
96c57f7e 699 print readline(*{$laststash."::DATA"});
e31885a0 700 }
a798dbf2 701 }
a798dbf2
MB
702}
703
f4a44678
SM
704sub coderef2text {
705 my $self = shift;
706 my $sub = shift;
0853f172 707 croak "Usage: ->coderef2text(CODEREF)" unless UNIVERSAL::isa($sub, "CODE");
08c6f5ec
RH
708
709 $self->init();
f4a44678
SM
710 return $self->indent($self->deparse_sub(svref_2object($sub)));
711}
712
415d4c68 713my %strict_bits = do {
d1718a7c 714 local $^H;
415d4c68
FC
715 map +($_ => strict::bits($_)), qw/refs subs vars/
716};
717
08c6f5ec
RH
718sub ambient_pragmas {
719 my $self = shift;
bc6b2ef6 720 my ($arybase, $hint_bits, $warning_bits, $hinthash) = (0, 0);
08c6f5ec
RH
721
722 while (@_ > 1) {
723 my $name = shift();
724 my $val = shift();
725
726 if ($name eq 'strict') {
727 require strict;
728
729 if ($val eq 'none') {
415d4c68 730 $hint_bits &= $strict_bits{$_} for qw/refs subs vars/;
08c6f5ec
RH
731 next();
732 }
733
734 my @names;
735 if ($val eq "all") {
736 @names = qw/refs subs vars/;
737 }
738 elsif (ref $val) {
739 @names = @$val;
740 }
741 else {
a0405c92 742 @names = split' ', $val;
08c6f5ec 743 }
415d4c68 744 $hint_bits |= $strict_bits{$_} for @names;
08c6f5ec
RH
745 }
746
bc6b2ef6
Z
747 elsif ($name eq '$[') {
748 if (OPpCONST_ARYBASE) {
749 $arybase = $val;
750 } else {
751 croak "\$[ can't be non-zero on this perl" unless $val == 0;
752 }
753 }
754
a0405c92
RH
755 elsif ($name eq 'integer'
756 || $name eq 'bytes'
757 || $name eq 'utf8') {
758 require "$name.pm";
08c6f5ec 759 if ($val) {
a0405c92
RH
760 $hint_bits |= ${$::{"${name}::"}{"hint_bits"}};
761 }
762 else {
763 $hint_bits &= ~${$::{"${name}::"}{"hint_bits"}};
764 }
765 }
766
767 elsif ($name eq 're') {
768 require re;
769 if ($val eq 'none') {
2570cdf1 770 $hint_bits &= ~re::bits(qw/taint eval/);
a0405c92
RH
771 next();
772 }
773
774 my @names;
775 if ($val eq 'all') {
2570cdf1 776 @names = qw/taint eval/;
a0405c92
RH
777 }
778 elsif (ref $val) {
779 @names = @$val;
08c6f5ec
RH
780 }
781 else {
a0405c92 782 @names = split' ',$val;
08c6f5ec 783 }
a0405c92 784 $hint_bits |= re::bits(@names);
08c6f5ec
RH
785 }
786
787 elsif ($name eq 'warnings') {
08c6f5ec 788 if ($val eq 'none') {
810aef70 789 $warning_bits = $warnings::NONE;
08c6f5ec
RH
790 next();
791 }
792
793 my @names;
794 if (ref $val) {
795 @names = @$val;
796 }
797 else {
798 @names = split/\s+/, $val;
799 }
800
810aef70 801 $warning_bits = $warnings::NONE if !defined ($warning_bits);
08c6f5ec
RH
802 $warning_bits |= warnings::bits(@names);
803 }
804
805 elsif ($name eq 'warning_bits') {
806 $warning_bits = $val;
807 }
808
809 elsif ($name eq 'hint_bits') {
810 $hint_bits = $val;
811 }
812
0ced6c29
RGS
813 elsif ($name eq '%^H') {
814 $hinthash = $val;
815 }
816
08c6f5ec
RH
817 else {
818 croak "Unknown pragma type: $name";
819 }
820 }
821 if (@_) {
822 croak "The ambient_pragmas method expects an even number of args";
823 }
824
bc6b2ef6 825 $self->{'ambient_arybase'} = $arybase;
08c6f5ec 826 $self->{'ambient_warnings'} = $warning_bits;
a0405c92 827 $self->{'ambient_hints'} = $hint_bits;
0ced6c29 828 $self->{'ambient_hinthash'} = $hinthash;
08c6f5ec
RH
829}
830
d989cdac 831# This method is the inner loop, so try to keep it simple
6e90668e
SM
832sub deparse {
833 my $self = shift;
d989cdac 834 my($op, $cx) = @_;
34a48b4b
RH
835
836 Carp::confess("Null op in deparse") if !defined($op)
837 || class($op) eq "NULL";
3f872cb9 838 my $meth = "pp_" . $op->name;
9d2c6865 839 return $self->$meth($op, $cx);
a798dbf2
MB
840}
841
6e90668e 842sub indent {
f4a44678 843 my $self = shift;
6e90668e
SM
844 my $txt = shift;
845 my @lines = split(/\n/, $txt);
846 my $leader = "";
f4a44678 847 my $level = 0;
6e90668e
SM
848 my $line;
849 for $line (@lines) {
f4a44678
SM
850 my $cmd = substr($line, 0, 1);
851 if ($cmd eq "\t" or $cmd eq "\b") {
852 $level += ($cmd eq "\t" ? 1 : -1) * $self->{'indent_size'};
853 if ($self->{'use_tabs'}) {
854 $leader = "\t" x ($level / 8) . " " x ($level % 8);
855 } else {
856 $leader = " " x $level;
857 }
6e90668e
SM
858 $line = substr($line, 1);
859 }
f5aa8f4e
SM
860 if (substr($line, 0, 1) eq "\f") {
861 $line = substr($line, 1); # no indent
862 } else {
863 $line = $leader . $line;
864 }
9d2c6865 865 $line =~ s/\cK;?//g;
6e90668e
SM
866 }
867 return join("\n", @lines);
868}
869
6e90668e
SM
870sub deparse_sub {
871 my $self = shift;
872 my $cv = shift;
873 my $proto = "";
ce4e655d 874Carp::confess("NULL in deparse_sub") if !defined($cv) || $cv->isa("B::NULL");
34a48b4b
RH
875Carp::confess("SPECIAL in deparse_sub") if $cv->isa("B::SPECIAL");
876 local $self->{'curcop'} = $self->{'curcop'};
6e90668e
SM
877 if ($cv->FLAGS & SVf_POK) {
878 $proto = "(". $cv->PV . ") ";
879 }
aa381260 880 if ($cv->CvFLAGS & (CVf_METHOD|CVf_LOCKED|CVf_LVALUE)) {
6aaf4108
SC
881 $proto .= ": ";
882 $proto .= "lvalue " if $cv->CvFLAGS & CVf_LVALUE;
aa381260 883 $proto .= "locked " if $cv->CvFLAGS & CVf_LOCKED;
6aaf4108
SC
884 $proto .= "method " if $cv->CvFLAGS & CVf_METHOD;
885 }
886
6e90668e 887 local($self->{'curcv'}) = $cv;
8510e997 888 local($self->{'curcvlex'});
0ced6c29
RGS
889 local(@$self{qw'curstash warnings hints hinthash'})
890 = @$self{qw'curstash warnings hints hinthash'};
ce4e655d 891 my $body;
6e90668e 892 if (not null $cv->ROOT) {
ce4e655d
RH
893 my $lineseq = $cv->ROOT->first;
894 if ($lineseq->name eq "lineseq") {
895 my @ops;
896 for(my$o=$lineseq->first; $$o; $o=$o->sibling) {
897 push @ops, $o;
898 }
93a8ff62 899 $body = $self->lineseq(undef, 0, @ops).";";
ce4e655d
RH
900 my $scope_en = $self->find_scope_en($lineseq);
901 if (defined $scope_en) {
902 my $subs = join"", $self->seq_subs($scope_en);
903 $body .= ";\n$subs" if length($subs);
904 }
905 }
906 else {
907 $body = $self->deparse($cv->ROOT->first, 0);
908 }
de3f1649 909 }
ce4e655d
RH
910 else {
911 my $sv = $cv->const_sv;
912 if ($$sv) {
913 # uh-oh. inlinable sub... format it differently
d989cdac 914 return $proto . "{ " . $self->const($sv, 0) . " }\n";
ce4e655d
RH
915 } else { # XSUB? (or just a declaration)
916 return "$proto;\n";
917 }
6e90668e 918 }
ce4e655d 919 return $proto ."{\n\t$body\n\b}" ."\n";
6e90668e
SM
920}
921
922sub deparse_format {
923 my $self = shift;
924 my $form = shift;
925 my @text;
926 local($self->{'curcv'}) = $form;
8510e997 927 local($self->{'curcvlex'});
67fc2416 928 local($self->{'in_format'}) = 1;
0ced6c29
RGS
929 local(@$self{qw'curstash warnings hints hinthash'})
930 = @$self{qw'curstash warnings hints hinthash'};
6e90668e
SM
931 my $op = $form->ROOT;
932 my $kid;
fb725297
RGS
933 return "\f." if $op->first->name eq 'stub'
934 || $op->first->name eq 'nextstate';
6e90668e
SM
935 $op = $op->first->first; # skip leavewrite, lineseq
936 while (not null $op) {
937 $op = $op->sibling; # skip nextstate
938 my @exprs;
939 $kid = $op->first->sibling; # skip pushmark
a5b0cd91 940 push @text, "\f".$self->const_sv($kid)->PV;
6e90668e
SM
941 $kid = $kid->sibling;
942 for (; not null $kid; $kid = $kid->sibling) {
93a8ff62 943 push @exprs, $self->deparse($kid, -1);
31c26a0a 944 $exprs[-1] =~ s/;\z//;
6e90668e 945 }
a5b0cd91 946 push @text, "\f".join(", ", @exprs)."\n" if @exprs;
6e90668e
SM
947 $op = $op->sibling;
948 }
a5b0cd91 949 return join("", @text) . "\f.";
6e90668e
SM
950}
951
6e90668e 952sub is_scope {
a798dbf2 953 my $op = shift;
3f872cb9
GS
954 return $op->name eq "leave" || $op->name eq "scope"
955 || $op->name eq "lineseq"
d989cdac 956 || ($op->name eq "null" && class($op) eq "UNOP"
3f872cb9 957 && (is_scope($op->first) || $op->first->name eq "enter"));
6e90668e
SM
958}
959
960sub is_state {
3f872cb9
GS
961 my $name = $_[0]->name;
962 return $name eq "nextstate" || $name eq "dbstate" || $name eq "setstate";
6e90668e
SM
963}
964
e38ccfd9 965sub is_miniwhile { # check for one-line loop ('foo() while $y--')
6e90668e 966 my $op = shift;
d989cdac 967 return (!null($op) and null($op->sibling)
3f872cb9
GS
968 and $op->name eq "null" and class($op) eq "UNOP"
969 and (($op->first->name =~ /^(and|or)$/
970 and $op->first->first->sibling->name eq "lineseq")
971 or ($op->first->name eq "lineseq"
6e90668e 972 and not null $op->first->first->sibling
3f872cb9 973 and $op->first->first->sibling->name eq "unstack")
6e90668e
SM
974 ));
975}
976
d989cdac
SM
977# Check if the op and its sibling are the initialization and the rest of a
978# for (..;..;..) { ... } loop
979sub is_for_loop {
980 my $op = shift;
981 # This OP might be almost anything, though it won't be a
982 # nextstate. (It's the initialization, so in the canonical case it
eae48c89
Z
983 # will be an sassign.) The sibling is (old style) a lineseq whose
984 # first child is a nextstate and whose second is a leaveloop, or
985 # (new style) an unstack whose sibling is a leaveloop.
d989cdac 986 my $lseq = $op->sibling;
eae48c89
Z
987 return 0 unless !is_state($op) and !null($lseq);
988 if ($lseq->name eq "lineseq") {
d989cdac
SM
989 if ($lseq->first && !null($lseq->first) && is_state($lseq->first)
990 && (my $sib = $lseq->first->sibling)) {
991 return (!null($sib) && $sib->name eq "leaveloop");
992 }
eae48c89
Z
993 } elsif ($lseq->name eq "unstack" && ($lseq->flags & OPf_SPECIAL)) {
994 my $sib = $lseq->sibling;
995 return $sib && !null($sib) && $sib->name eq "leaveloop";
d989cdac
SM
996 }
997 return 0;
998}
999
6e90668e
SM
1000sub is_scalar {
1001 my $op = shift;
3f872cb9
GS
1002 return ($op->name eq "rv2sv" or
1003 $op->name eq "padsv" or
1004 $op->name eq "gv" or # only in array/hash constructs
bd0865ec 1005 $op->flags & OPf_KIDS && !null($op->first)
3f872cb9 1006 && $op->first->name eq "gvsv");
6e90668e
SM
1007}
1008
9d2c6865
SM
1009sub maybe_parens {
1010 my $self = shift;
1011 my($text, $cx, $prec) = @_;
1012 if ($prec < $cx # unary ops nest just fine
1013 or $prec == $cx and $cx != 4 and $cx != 16 and $cx != 21
1014 or $self->{'parens'})
1015 {
1016 $text = "($text)";
1017 # In a unop, let parent reuse our parens; see maybe_parens_unop
1018 $text = "\cS" . $text if $cx == 16;
1019 return $text;
1020 } else {
1021 return $text;
1022 }
1023}
1024
e38ccfd9 1025# same as above, but get around the 'if it looks like a function' rule
9d2c6865
SM
1026sub maybe_parens_unop {
1027 my $self = shift;
1028 my($name, $kid, $cx) = @_;
1029 if ($cx > 16 or $self->{'parens'}) {
a0035eb8
RH
1030 $kid = $self->deparse($kid, 1);
1031 if ($name eq "umask" && $kid =~ /^\d+$/) {
1032 $kid = sprintf("%#o", $kid);
1033 }
4a1ac32e 1034 return $self->keyword($name) . "($kid)";
9d2c6865
SM
1035 } else {
1036 $kid = $self->deparse($kid, 16);
a0035eb8
RH
1037 if ($name eq "umask" && $kid =~ /^\d+$/) {
1038 $kid = sprintf("%#o", $kid);
1039 }
4a1ac32e 1040 $name = $self->keyword($name);
9d2c6865
SM
1041 if (substr($kid, 0, 1) eq "\cS") {
1042 # use kid's parens
1043 return $name . substr($kid, 1);
1044 } elsif (substr($kid, 0, 1) eq "(") {
1045 # avoid looks-like-a-function trap with extra parens
e38ccfd9 1046 # ('+' can lead to ambiguities)
9d2c6865
SM
1047 return "$name(" . $kid . ")";
1048 } else {
1049 return "$name $kid";
1050 }
1051 }
1052}
1053
1054sub maybe_parens_func {
1055 my $self = shift;
1056 my($func, $text, $cx, $prec) = @_;
1057 if ($prec <= $cx or substr($text, 0, 1) eq "(" or $self->{'parens'}) {
1058 return "$func($text)";
1059 } else {
1060 return "$func $text";
1061 }
1062}
1063
6e90668e
SM
1064sub maybe_local {
1065 my $self = shift;
9d2c6865 1066 my($op, $cx, $text) = @_;
ce4e655d
RH
1067 my $our_intro = ($op->name =~ /^(gv|rv2)[ash]v$/) ? OPpOUR_INTRO : 0;
1068 if ($op->private & (OPpLVAL_INTRO|$our_intro)
1069 and not $self->{'avoid_local'}{$$op}) {
1070 my $our_local = ($op->private & OPpLVAL_INTRO) ? "local" : "our";
8e3542b6 1071 if( $our_local eq 'our' ) {
640d5d41
FC
1072 if ( $text !~ /^\W(\w+::)*\w+\z/
1073 and !utf8::decode($text) || $text !~ /^\W(\w+::)*\w+\z/
1074 ) {
1075 die "Unexpected our($text)\n";
1076 }
d989cdac 1077 $text =~ s/(\w+::)+//;
8e3542b6 1078 }
e8d3f51b 1079 if (want_scalar($op)) {
ce4e655d 1080 return "$our_local $text";
e8d3f51b 1081 } else {
ce4e655d 1082 return $self->maybe_parens_func("$our_local", $text, $cx, 16);
e8d3f51b 1083 }
6e90668e
SM
1084 } else {
1085 return $text;
a798dbf2 1086 }
a798dbf2
MB
1087}
1088
3ed82cfc
GS
1089sub maybe_targmy {
1090 my $self = shift;
1091 my($op, $cx, $func, @args) = @_;
1092 if ($op->private & OPpTARGET_MY) {
1093 my $var = $self->padname($op->targ);
1094 my $val = $func->($self, $op, 7, @args);
1095 return $self->maybe_parens("$var = $val", $cx, 7);
1096 } else {
1097 return $func->($self, $op, $cx, @args);
1098 }
1099}
1100
6e90668e
SM
1101sub padname_sv {
1102 my $self = shift;
1103 my $targ = shift;
d989cdac 1104 return $self->{'curcv'}->PADLIST->ARRAYelt(0)->ARRAYelt($targ);
6e90668e
SM
1105}
1106
1107sub maybe_my {
1108 my $self = shift;
9d2c6865 1109 my($op, $cx, $text) = @_;
4c1f658f 1110 if ($op->private & OPpLVAL_INTRO and not $self->{'avoid_local'}{$$op}) {
80e3f4ad
FC
1111 my $my = $op->private & OPpPAD_STATE
1112 ? $self->keyword("state")
1113 : "my";
e8d3f51b 1114 if (want_scalar($op)) {
3462b4ac 1115 return "$my $text";
e8d3f51b 1116 } else {
3462b4ac 1117 return $self->maybe_parens_func($my, $text, $cx, 16);
e8d3f51b 1118 }
6e90668e
SM
1119 } else {
1120 return $text;
1121 }
1122}
1123
9d2c6865
SM
1124# The following OPs don't have functions:
1125
1126# pp_padany -- does not exist after parsing
9d2c6865 1127
2ae48fff
RGS
1128sub AUTOLOAD {
1129 if ($AUTOLOAD =~ s/^.*::pp_//) {
1130 warn "unexpected OP_".uc $AUTOLOAD;
1131 return "XXX";
1132 } else {
1133 die "Undefined subroutine $AUTOLOAD called";
1134 }
9d2c6865 1135}
6e90668e 1136
611c1e95
IZ
1137sub DESTROY {} # Do not AUTOLOAD
1138
ce4e655d
RH
1139# $root should be the op which represents the root of whatever
1140# we're sequencing here. If it's undefined, then we don't append
1141# any subroutine declarations to the deparsed ops, otherwise we
1142# append appropriate declarations.
58cccf98 1143sub lineseq {
93a8ff62 1144 my($self, $root, $cx, @ops) = @_;
58cccf98 1145 my($expr, @exprs);
ce4e655d
RH
1146
1147 my $out_cop = $self->{'curcop'};
1148 my $out_seq = defined($out_cop) ? $out_cop->cop_seq : undef;
1149 my $limit_seq;
1150 if (defined $root) {
1151 $limit_seq = $out_seq;
76df5e8f
DM
1152 my $nseq;
1153 $nseq = $self->find_scope_st($root->sibling) if ${$root->sibling};
ce4e655d
RH
1154 $limit_seq = $nseq if !defined($limit_seq)
1155 or defined($nseq) && $nseq < $limit_seq;
1156 }
1157 $limit_seq = $self->{'limit_seq'}
1158 if defined($self->{'limit_seq'})
1159 && (!defined($limit_seq) || $self->{'limit_seq'} < $limit_seq);
1160 local $self->{'limit_seq'} = $limit_seq;
09d856fb
CK
1161
1162 $self->walk_lineseq($root, \@ops,
1163 sub { push @exprs, $_[0]} );
1164
93a8ff62
FC
1165 my $sep = $cx ? '; ' : ";\n";
1166 my $body = join($sep, grep {length} @exprs);
ce4e655d 1167 my $subs = "";
67fc2416 1168 if (defined $root && defined $limit_seq && !$self->{'in_format'}) {
ce4e655d
RH
1169 $subs = join "\n", $self->seq_subs($limit_seq);
1170 }
93a8ff62 1171 return join($sep, grep {length} $body, $subs);
6e90668e
SM
1172}
1173
58cccf98 1174sub scopeop {
d989cdac 1175 my($real_block, $self, $op, $cx) = @_;
58cccf98
SM
1176 my $kid;
1177 my @kids;
a0405c92 1178
0ced6c29
RGS
1179 local(@$self{qw'curstash warnings hints hinthash'})
1180 = @$self{qw'curstash warnings hints hinthash'} if $real_block;
58cccf98
SM
1181 if ($real_block) {
1182 $kid = $op->first->sibling; # skip enter
1183 if (is_miniwhile($kid)) {
1184 my $top = $kid->first;
1185 my $name = $top->name;
1186 if ($name eq "and") {
1187 $name = "while";
1188 } elsif ($name eq "or") {
1189 $name = "until";
1190 } else { # no conditional -> while 1 or until 0
1191 return $self->deparse($top->first, 1) . " while 1";
1192 }
1193 my $cond = $top->first;
1194 my $body = $cond->sibling->first; # skip lineseq
1195 $cond = $self->deparse($cond, 1);
1196 $body = $self->deparse($body, 1);
1197 return "$body $name $cond";
6e90668e 1198 }
58cccf98
SM
1199 } else {
1200 $kid = $op->first;
1201 }
1202 for (; !null($kid); $kid = $kid->sibling) {
1203 push @kids, $kid;
6e90668e 1204 }
d989cdac 1205 if ($cx > 0) { # inside an expression, (a do {} while for lineseq)
93a8ff62 1206 return "do {\n\t" . $self->lineseq($op, 0, @kids) . "\n\b}";
9d2c6865 1207 } else {
93a8ff62 1208 my $lineseq = $self->lineseq($op, $cx, @kids);
7a9b44b9 1209 return (length ($lineseq) ? "$lineseq;" : "");
6e90668e 1210 }
6e90668e
SM
1211}
1212
ce4e655d 1213sub pp_scope { scopeop(0, @_); }
58cccf98
SM
1214sub pp_lineseq { scopeop(0, @_); }
1215sub pp_leave { scopeop(1, @_); }
9d2c6865 1216
d989cdac
SM
1217# This is a special case of scopeop and lineseq, for the case of the
1218# main_root. The difference is that we print the output statements as
1219# soon as we get them, for the sake of impatient users.
1220sub deparse_root {
1221 my $self = shift;
1222 my($op) = @_;
0ced6c29
RGS
1223 local(@$self{qw'curstash warnings hints hinthash'})
1224 = @$self{qw'curstash warnings hints hinthash'};
d989cdac 1225 my @kids;
4ca8de37 1226 return if null $op->first; # Can happen, e.g., for Bytecode without -k
d989cdac
SM
1227 for (my $kid = $op->first->sibling; !null($kid); $kid = $kid->sibling) {
1228 push @kids, $kid;
1229 }
09d856fb
CK
1230 $self->walk_lineseq($op, \@kids,
1231 sub { print $self->indent($_[0].';');
1232 print "\n" unless $_[1] == $#kids;
1233 });
1234}
1235
1236sub walk_lineseq {
1237 my ($self, $op, $kids, $callback) = @_;
1238 my @kids = @$kids;
d989cdac
SM
1239 for (my $i = 0; $i < @kids; $i++) {
1240 my $expr = "";
1241 if (is_state $kids[$i]) {
09d856fb 1242 $expr = $self->deparse($kids[$i++], 0);
d989cdac 1243 if ($i > $#kids) {
09d856fb 1244 $callback->($expr, $i);
d989cdac
SM
1245 last;
1246 }
1247 }
1248 if (is_for_loop($kids[$i])) {
eae48c89
Z
1249 $callback->($expr . $self->for_loop($kids[$i], 0),
1250 $i += $kids[$i]->sibling->name eq "unstack" ? 2 : 1);
d989cdac
SM
1251 next;
1252 }
1253 $expr .= $self->deparse($kids[$i], (@kids != 1)/2);
1254 $expr =~ s/;\n?\z//;
09d856fb 1255 $callback->($expr, $i);
d989cdac
SM
1256 }
1257}
1258
6e90668e
SM
1259# The BEGIN {} is used here because otherwise this code isn't executed
1260# when you run B::Deparse on itself.
1261my %globalnames;
1262BEGIN { map($globalnames{$_}++, "SIG", "STDIN", "STDOUT", "STDERR", "INC",
1263 "ENV", "ARGV", "ARGVOUT", "_"); }
1264
1265sub gv_name {
1266 my $self = shift;
1267 my $gv = shift;
b89b7257 1268 my $raw = shift;
c6e79e55 1269Carp::confess() unless ref($gv) eq "B::GV";
6e90668e 1270 my $stash = $gv->STASH->NAME;
b89b7257 1271 my $name = $raw ? $gv->NAME : $gv->SAFENAME;
8b2d6640
FC
1272 if ($stash eq 'main' && $name =~ /^::/) {
1273 $stash = '::';
1274 }
b861b87f
FC
1275 elsif (($stash eq 'main'
1276 && ($globalnames{$name} || $name =~ /^[^A-Za-z_:]/))
8b2d6640
FC
1277 or ($stash eq $self->{'curstash'} && !$globalnames{$name}
1278 && ($stash eq 'main' || $name !~ /::/))
b861b87f 1279 )
9d2c6865 1280 {
6e90668e
SM
1281 $stash = "";
1282 } else {
1283 $stash = $stash . "::";
a798dbf2 1284 }
b89b7257 1285 if (!$raw and $name =~ /^(\^..|{)/) {
083bda02 1286 $name = "{$name}"; # ${^WARNING_BITS}, etc and ${
6e90668e
SM
1287 }
1288 return $stash . $name;
a798dbf2
MB
1289}
1290
8510e997 1291# Return the name to use for a stash variable.
415d4c68
FC
1292# If a lexical with the same name is in scope, or
1293# if strictures are enabled, it may need to be
8510e997
RH
1294# fully-qualified.
1295sub stash_variable {
bb8996b8 1296 my ($self, $prefix, $name, $cx) = @_;
8510e997
RH
1297
1298 return "$prefix$name" if $name =~ /::/;
1299
d989cdac 1300 unless ($prefix eq '$' || $prefix eq '@' || #'
8510e997
RH
1301 $prefix eq '%' || $prefix eq '$#') {
1302 return "$prefix$name";
1303 }
1304
61154ac0
FC
1305 if ($name =~ /^[^\w+-]$/) {
1306 if (defined $cx && $cx == 26) {
1307 if ($prefix eq '@') {
bb8996b8
HY
1308 return "$prefix\{$name}";
1309 }
61154ac0
FC
1310 elsif ($name eq '#') { return '${#}' } # "${#}a" vs "$#a"
1311 }
1312 if ($prefix eq '$#') {
6ec73527 1313 return "\$#{$name}";
61154ac0 1314 }
6ec73527 1315 }
bb8996b8 1316
415d4c68 1317 return $prefix . $self->maybe_qualify($prefix, $name);
8510e997
RH
1318}
1319
be6cf5cf
FC
1320# Return just the name, without the prefix. It may be returned as a quoted
1321# string. The second return value is a boolean indicating that.
1322sub stash_variable_name {
1323 my($self, $prefix, $gv) = @_;
1324 my $name = $self->gv_name($gv, 1);
415d4c68 1325 $name = $self->maybe_qualify($prefix,$name);
be6cf5cf
FC
1326 if ($name =~ /^(?:\S|(?!\d)[\ca-\cz]?(?:\w|::)*|\d+)\z/) {
1327 $name =~ s/^([\ca-\cz])/'^'.($1|'@')/e;
1328 $name =~ /^(\^..|{)/ and $name = "{$name}";
1329 return $name, 0; # not quoted
1330 }
1331 else {
1332 single_delim("q", "'", $name), 1;
1333 }
1334}
1335
415d4c68
FC
1336sub maybe_qualify {
1337 my ($self,$prefix,$name) = @_;
1338 my $v = ($prefix eq '$#' ? '@' : $prefix) . $name;
1339 return $name if !$prefix || $name =~ /::/;
1340 return $self->{'curstash'}.'::'. $name
1341 if
36727b53
FC
1342 $name =~ /^(?!\d)\w/ # alphabetic
1343 && $v !~ /^\$[ab]\z/ # not $a or $b
415d4c68
FC
1344 && !$globalnames{$name} # not a global name
1345 && $self->{hints} & $strict_bits{vars} # strict vars
1346 && !$self->lex_in_scope($v,1) # no "our"
1347 or $self->lex_in_scope($v); # conflicts with "my" variable
1348 return $name;
1349}
1350
8510e997 1351sub lex_in_scope {
415d4c68
FC
1352 my ($self, $name, $our) = @_;
1353 substr $name, 0, 0, = $our ? 'o' : 'm'; # our/my
8510e997
RH
1354 $self->populate_curcvlex() if !defined $self->{'curcvlex'};
1355
6ec152c3 1356 return 0 if !defined($self->{'curcop'});
8510e997
RH
1357 my $seq = $self->{'curcop'}->cop_seq;
1358 return 0 if !exists $self->{'curcvlex'}{$name};
1359 for my $a (@{$self->{'curcvlex'}{$name}}) {
1360 my ($st, $en) = @$a;
1361 return 1 if $seq > $st && $seq <= $en;
1362 }
1363 return 0;
1364}
1365
1366sub populate_curcvlex {
1367 my $self = shift;
ce4e655d 1368 for (my $cv = $self->{'curcv'}; class($cv) eq "CV"; $cv = $cv->OUTSIDE) {
7dafbf52
DM
1369 my $padlist = $cv->PADLIST;
1370 # an undef CV still in lexical chain
1371 next if class($padlist) eq "SPECIAL";
1372 my @padlist = $padlist->ARRAY;
8510e997
RH
1373 my @ns = $padlist[0]->ARRAY;
1374
1375 for (my $i=0; $i<@ns; ++$i) {
1376 next if class($ns[$i]) eq "SPECIAL";
0f2fe21d
RH
1377 if (class($ns[$i]) eq "PV") {
1378 # Probably that pesky lexical @_
1379 next;
1380 }
8510e997 1381 my $name = $ns[$i]->PVX;
7dafbf52
DM
1382 my ($seq_st, $seq_en) =
1383 ($ns[$i]->FLAGS & SVf_FAKE)
1384 ? (0, 999999)
809abb02 1385 : ($ns[$i]->COP_SEQ_RANGE_LOW, $ns[$i]->COP_SEQ_RANGE_HIGH);
8510e997 1386
415d4c68
FC
1387 push @{$self->{'curcvlex'}{
1388 ($ns[$i]->FLAGS & SVpad_OUR ? 'o' : 'm') . $name
1389 }}, [$seq_st, $seq_en];
8510e997
RH
1390 }
1391 }
1392}
1393
ce4e655d
RH
1394sub find_scope_st { ((find_scope(@_))[0]); }
1395sub find_scope_en { ((find_scope(@_))[1]); }
1396
1397# Recurses down the tree, looking for pad variable introductions and COPs
1398sub find_scope {
1399 my ($self, $op, $scope_st, $scope_en) = @_;
ff97752d 1400 carp("Undefined op in find_scope") if !defined $op;
ce4e655d
RH
1401 return ($scope_st, $scope_en) unless $op->flags & OPf_KIDS;
1402
b6b46d6f
AB
1403 my @queue = ($op);
1404 while(my $op = shift @queue ) {
1405 for (my $o=$op->first; $$o; $o=$o->sibling) {
1406 if ($o->name =~ /^pad.v$/ && $o->private & OPpLVAL_INTRO) {
1407 my $s = int($self->padname_sv($o->targ)->COP_SEQ_RANGE_LOW);
1408 my $e = $self->padname_sv($o->targ)->COP_SEQ_RANGE_HIGH;
1409 $scope_st = $s if !defined($scope_st) || $s < $scope_st;
1410 $scope_en = $e if !defined($scope_en) || $e > $scope_en;
1411 return ($scope_st, $scope_en);
1412 }
1413 elsif (is_state($o)) {
1414 my $c = $o->cop_seq;
1415 $scope_st = $c if !defined($scope_st) || $c < $scope_st;
1416 $scope_en = $c if !defined($scope_en) || $c > $scope_en;
1417 return ($scope_st, $scope_en);
1418 }
1419 elsif ($o->flags & OPf_KIDS) {
1420 unshift (@queue, $o);
1421 }
34a48b4b
RH
1422 }
1423 }
ce4e655d
RH
1424
1425 return ($scope_st, $scope_en);
34a48b4b
RH
1426}
1427
1428# Returns a list of subs which should be inserted before the COP
1429sub cop_subs {
1430 my ($self, $op, $out_seq) = @_;
1431 my $seq = $op->cop_seq;
1432 # If we have nephews, then our sequence number indicates
1433 # the cop_seq of the end of some sort of scope.
1434 if (class($op->sibling) ne "NULL" && $op->sibling->flags & OPf_KIDS
ce4e655d
RH
1435 and my $nseq = $self->find_scope_st($op->sibling) ) {
1436 $seq = $nseq;
34a48b4b
RH
1437 }
1438 $seq = $out_seq if defined($out_seq) && $out_seq < $seq;
1439 return $self->seq_subs($seq);
1440}
1441
1442sub seq_subs {
1443 my ($self, $seq) = @_;
1444 my @text;
1445#push @text, "# ($seq)\n";
1446
ce4e655d 1447 return "" if !defined $seq;
34a48b4b
RH
1448 while (scalar(@{$self->{'subs_todo'}})
1449 and $seq > $self->{'subs_todo'}[0][0]) {
1450 push @text, $self->next_todo;
1451 }
1452 return @text;
1453}
1454
95c04cde
NC
1455sub _features_from_bundle {
1456 my ($hints, $hh) = @_;
1873980a 1457 foreach (@{$feature::feature_bundle{@feature::hint_bundles[$hints >> $feature::hint_shift]}}) {
95c04cde
NC
1458 $hh->{$feature::feature{$_}} = 1;
1459 }
1460 return $hh;
1461}
1462
08c6f5ec 1463# Notice how subs and formats are inserted between statements here;
bc6b2ef6 1464# also $[ assignments and pragmas.
6e90668e
SM
1465sub pp_nextstate {
1466 my $self = shift;
9d2c6865 1467 my($op, $cx) = @_;
34a48b4b 1468 $self->{'curcop'} = $op;
6e90668e 1469 my @text;
34a48b4b 1470 push @text, $self->cop_subs($op);
11faa288 1471 my $stash = $op->stashpv;
6e90668e
SM
1472 if ($stash ne $self->{'curstash'}) {
1473 push @text, "package $stash;\n";
1474 $self->{'curstash'} = $stash;
1475 }
08c6f5ec 1476
bc6b2ef6
Z
1477 if (OPpCONST_ARYBASE && $self->{'arybase'} != $op->arybase) {
1478 push @text, '$[ = '. $op->arybase .";\n";
1479 $self->{'arybase'} = $op->arybase;
1480 }
1481
7a9b44b9
RH
1482 my $warnings = $op->warnings;
1483 my $warning_bits;
1484 if ($warnings->isa("B::SPECIAL") && $$warnings == 4) {
810aef70 1485 $warning_bits = $warnings::Bits{"all"} & WARN_MASK;
7a9b44b9 1486 }
e31885a0 1487 elsif ($warnings->isa("B::SPECIAL") && $$warnings == 5) {
810aef70 1488 $warning_bits = $warnings::NONE;
7a9b44b9 1489 }
e31885a0
RH
1490 elsif ($warnings->isa("B::SPECIAL")) {
1491 $warning_bits = undef;
1492 }
7a9b44b9 1493 else {
34a48b4b 1494 $warning_bits = $warnings->PV & WARN_MASK;
7a9b44b9
RH
1495 }
1496
e31885a0
RH
1497 if (defined ($warning_bits) and
1498 !defined($self->{warnings}) || $self->{'warnings'} ne $warning_bits) {
08c6f5ec 1499 push @text, declare_warnings($self->{'warnings'}, $warning_bits);
7a9b44b9
RH
1500 $self->{'warnings'} = $warning_bits;
1501 }
1502
2be95ceb 1503 my $hints = $] < 5.008009 ? $op->private : $op->hints;
0bb01b05 1504 my $old_hints = $self->{'hints'};
2be95ceb
NC
1505 if ($self->{'hints'} != $hints) {
1506 push @text, declare_hints($self->{'hints'}, $hints);
1507 $self->{'hints'} = $hints;
a0405c92
RH
1508 }
1509
0bb01b05
FC
1510 my $newhh;
1511 if ($] > 5.009) {
1512 $newhh = $op->hints_hash->HASH;
1513 }
1514
1515 if ($] >= 5.015006) {
1516 # feature bundle hints
149758b3
NC
1517 my $from = $old_hints & $feature::hint_mask;
1518 my $to = $ hints & $feature::hint_mask;
0bb01b05 1519 if ($from != $to) {
149758b3 1520 if ($to == $feature::hint_mask) {
0bb01b05
FC
1521 if ($self->{'hinthash'}) {
1522 delete $self->{'hinthash'}{$_}
1523 for grep /^feature_/, keys %{$self->{'hinthash'}};
1524 }
1525 else { $self->{'hinthash'} = {} }
95c04cde
NC
1526 $self->{'hinthash'}
1527 = _features_from_bundle($from, $self->{'hinthash'});
0bb01b05
FC
1528 }
1529 else {
1530 my $bundle =
1531 $feature::hint_bundles[$to >> $feature::hint_shift];
1532 $bundle =~ s/(\d[13579])\z/$1+1/e; # 5.11 => 5.12
1533 push @text, "no feature;\n",
1534 "use feature ':$bundle';\n";
1535 }
1536 }
1537 }
1538
1539 if ($] > 5.009) {
1540 push @text, declare_hinthash(
1541 $self->{'hinthash'}, $newhh,
1542 $self->{indent_size}, $self->{hints},
1543 );
1544 $self->{'hinthash'} = $newhh;
0ced6c29
RGS
1545 }
1546
d989cdac
SM
1547 # This should go after of any branches that add statements, to
1548 # increase the chances that it refers to the same line it did in
1549 # the original program.
1550 if ($self->{'linenums'}) {
1551 push @text, "\f#line " . $op->line .
1552 ' "' . $op->file, qq'"\n';
1553 }
1554
98a1a137
Z
1555 push @text, $op->label . ": " if $op->label;
1556
6e90668e
SM
1557 return join("", @text);
1558}
1559
08c6f5ec
RH
1560sub declare_warnings {
1561 my ($from, $to) = @_;
e6f1f756 1562 if (($to & WARN_MASK) eq (warnings::bits("all") & WARN_MASK)) {
a0405c92
RH
1563 return "use warnings;\n";
1564 }
e6f1f756 1565 elsif (($to & WARN_MASK) eq ("\0"x length($to) & WARN_MASK)) {
a0405c92
RH
1566 return "no warnings;\n";
1567 }
51a5edaf 1568 return "BEGIN {\${^WARNING_BITS} = ".perlstring($to)."}\n";
a0405c92
RH
1569}
1570
1571sub declare_hints {
1572 my ($from, $to) = @_;
a0035eb8
RH
1573 my $use = $to & ~$from;
1574 my $no = $from & ~$to;
1575 my $decls = "";
1576 for my $pragma (hint_pragmas($use)) {
1577 $decls .= "use $pragma;\n";
1578 }
1579 for my $pragma (hint_pragmas($no)) {
1580 $decls .= "no $pragma;\n";
1581 }
1582 return $decls;
1583}
1584
493c23c6
NC
1585# Internal implementation hints that the core sets automatically, so don't need
1586# (or want) to be passed back to the user
1587my %ignored_hints = (
1588 'open<' => 1,
1589 'open>' => 1,
dca6062a 1590 ':' => 1,
1c74777c
FC
1591 'strict/refs' => 1,
1592 'strict/subs' => 1,
1593 'strict/vars' => 1,
2e8342de 1594);
493c23c6 1595
a8095af7
FC
1596my %rev_feature;
1597
0ced6c29 1598sub declare_hinthash {
0bb01b05 1599 my ($from, $to, $indent, $hints) = @_;
a8095af7 1600 my $doing_features =
149758b3 1601 ($hints & $feature::hint_mask) == $feature::hint_mask;
0ced6c29 1602 my @decls;
a8095af7
FC
1603 my @features;
1604 my @unfeatures; # bugs?
0bb01b05 1605 for my $key (sort keys %$to) {
493c23c6 1606 next if $ignored_hints{$key};
a8095af7
FC
1607 my $is_feature = $key =~ /^feature_/ && $^V ge 5.15.6;
1608 next if $is_feature and not $doing_features;
04be0204 1609 if (!exists $from->{$key} or $from->{$key} ne $to->{$key}) {
a8095af7 1610 push(@features, $key), next if $is_feature;
035146a3
FC
1611 push @decls,
1612 qq(\$^H{) . single_delim("q", "'", $key) . qq(} = )
1613 . (
1614 defined $to->{$key}
1615 ? single_delim("q", "'", $to->{$key})
1616 : 'undef'
1617 )
04be0204 1618 . qq(;);
0ced6c29
RGS
1619 }
1620 }
0bb01b05 1621 for my $key (sort keys %$from) {
493c23c6 1622 next if $ignored_hints{$key};
a8095af7
FC
1623 my $is_feature = $key =~ /^feature_/ && $^V ge 5.15.6;
1624 next if $is_feature and not $doing_features;
0ced6c29 1625 if (!exists $to->{$key}) {
a8095af7 1626 push(@unfeatures, $key), next if $is_feature;
0ced6c29
RGS
1627 push @decls, qq(delete \$^H{'$key'};);
1628 }
1629 }
a8095af7
FC
1630 my @ret;
1631 if (@features || @unfeatures) {
a8095af7
FC
1632 if (!%rev_feature) { %rev_feature = reverse %feature::feature }
1633 }
1634 if (@features) {
1635 push @ret, "use feature "
1636 . join(", ", map "'$rev_feature{$_}'", @features) . ";\n";
1637 }
1638 if (@unfeatures) {
1639 push @ret, "no feature "
1640 . join(", ", map "'$rev_feature{$_}'", @unfeatures)
1641 . ";\n";
1642 }
1643 @decls and
1644 push @ret,
1645 join("\n" . (" " x $indent), "BEGIN {", @decls) . "\n}\n";
1646 return @ret;
0ced6c29
RGS
1647}
1648
a0035eb8
RH
1649sub hint_pragmas {
1650 my ($bits) = @_;
415d4c68 1651 my (@pragmas, @strict);
a0035eb8 1652 push @pragmas, "integer" if $bits & 0x1;
415d4c68
FC
1653 for (sort keys %strict_bits) {
1654 push @strict, "'$_'" if $bits & $strict_bits{$_};
1655 }
1656 if (@strict == keys %strict_bits) {
1657 push @pragmas, "strict";
1658 }
1659 elsif (@strict) {
1660 push @pragmas, "strict " . join ', ', @strict;
1661 }
a0035eb8
RH
1662 push @pragmas, "bytes" if $bits & 0x8;
1663 return @pragmas;
08c6f5ec
RH
1664}
1665
6e90668e 1666sub pp_dbstate { pp_nextstate(@_) }
3f872cb9 1667sub pp_setstate { pp_nextstate(@_) }
6e90668e
SM
1668
1669sub pp_unstack { return "" } # see also leaveloop
1670
80e3f4ad
FC
1671my %feature_keywords = (
1672 # keyword => 'feature',
1673 state => 'state',
1674 say => 'say',
1675 given => 'switch',
1676 when => 'switch',
1677 default => 'switch',
e36901c8 1678 break => 'switch',
7d789282 1679 evalbytes=>'evalbytes',
84ed0108 1680 __SUB__ => '__SUB__',
838f2281 1681 fc => 'fc',
80e3f4ad
FC
1682);
1683
4a1ac32e
FC
1684sub keyword {
1685 my $self = shift;
1686 my $name = shift;
1687 return $name if $name =~ /^CORE::/; # just in case
80e3f4ad 1688 if (exists $feature_keywords{$name}) {
223b1722 1689 my $hh;
149758b3
NC
1690 my $hints = $self->{hints} & $feature::hint_mask;
1691 if ($hints && $hints != $feature::hint_mask) {
1873980a 1692 $hh = _features_from_bundle($hints);
223b1722
FC
1693 }
1694 elsif ($hints) { $hh = $self->{'hinthash'} }
7d789282 1695 return "CORE::$name"
223b1722
FC
1696 if !$hh
1697 || !$hh->{"feature_$feature_keywords{$name}"}
80e3f4ad 1698 }
4a1ac32e 1699 if (
a598d0e5 1700 $name !~ /^(?:chom?p|do|exec|glob|s(?:elect|ystem))\z/
4a1ac32e
FC
1701 && !defined eval{prototype "CORE::$name"}
1702 ) { return $name }
1703 if (
1704 exists $self->{subs_declared}{$name}
1705 or
1706 exists &{"$self->{curstash}::$name"}
1707 ) {
1708 return "CORE::$name"
1709 }
1710 return $name;
1711}
1712
6e90668e
SM
1713sub baseop {
1714 my $self = shift;
9d2c6865 1715 my($op, $cx, $name) = @_;
4a1ac32e 1716 return $self->keyword($name);
6e90668e
SM
1717}
1718
e99ebc55
RH
1719sub pp_stub {
1720 my $self = shift;
1721 my($op, $cx, $name) = @_;
d989cdac 1722 if ($cx >= 1) {
e99ebc55
RH
1723 return "()";
1724 }
1725 else {
1726 return "();";
1727 }
1728}
6e90668e
SM
1729sub pp_wantarray { baseop(@_, "wantarray") }
1730sub pp_fork { baseop(@_, "fork") }
3ed82cfc
GS
1731sub pp_wait { maybe_targmy(@_, \&baseop, "wait") }
1732sub pp_getppid { maybe_targmy(@_, \&baseop, "getppid") }
1733sub pp_time { maybe_targmy(@_, \&baseop, "time") }
6e90668e
SM
1734sub pp_tms { baseop(@_, "times") }
1735sub pp_ghostent { baseop(@_, "gethostent") }
1736sub pp_gnetent { baseop(@_, "getnetent") }
1737sub pp_gprotoent { baseop(@_, "getprotoent") }
1738sub pp_gservent { baseop(@_, "getservent") }
1739sub pp_ehostent { baseop(@_, "endhostent") }
1740sub pp_enetent { baseop(@_, "endnetent") }
1741sub pp_eprotoent { baseop(@_, "endprotoent") }
1742sub pp_eservent { baseop(@_, "endservent") }
1743sub pp_gpwent { baseop(@_, "getpwent") }
1744sub pp_spwent { baseop(@_, "setpwent") }
1745sub pp_epwent { baseop(@_, "endpwent") }
1746sub pp_ggrent { baseop(@_, "getgrent") }
1747sub pp_sgrent { baseop(@_, "setgrent") }
1748sub pp_egrent { baseop(@_, "endgrent") }
1749sub pp_getlogin { baseop(@_, "getlogin") }
1750
1751sub POSTFIX () { 1 }
1752
9d2c6865
SM
1753# I couldn't think of a good short name, but this is the category of
1754# symbolic unary operators with interesting precedence
1755
1756sub pfixop {
1757 my $self = shift;
1758 my($op, $cx, $name, $prec, $flags) = (@_, 0);
1759 my $kid = $op->first;
1760 $kid = $self->deparse($kid, $prec);
843b15cc
FC
1761 return $self->maybe_parens(($flags & POSTFIX)
1762 ? "$kid$name"
1763 # avoid confusion with filetests
1764 : $name eq '-'
1765 && $kid =~ /^[a-zA-Z](?!\w)/
1766 ? "$name($kid)"
1767 : "$name$kid",
9d2c6865
SM
1768 $cx, $prec);
1769}
1770
1771sub pp_preinc { pfixop(@_, "++", 23) }
1772sub pp_predec { pfixop(@_, "--", 23) }
3ed82cfc
GS
1773sub pp_postinc { maybe_targmy(@_, \&pfixop, "++", 23, POSTFIX) }
1774sub pp_postdec { maybe_targmy(@_, \&pfixop, "--", 23, POSTFIX) }
9d2c6865
SM
1775sub pp_i_preinc { pfixop(@_, "++", 23) }
1776sub pp_i_predec { pfixop(@_, "--", 23) }
3ed82cfc
GS
1777sub pp_i_postinc { maybe_targmy(@_, \&pfixop, "++", 23, POSTFIX) }
1778sub pp_i_postdec { maybe_targmy(@_, \&pfixop, "--", 23, POSTFIX) }
68cc8748 1779sub pp_complement { maybe_targmy(@_, \&pfixop, "~", 21) }
9d2c6865 1780
3ed82cfc
GS
1781sub pp_negate { maybe_targmy(@_, \&real_negate) }
1782sub real_negate {
9d2c6865
SM
1783 my $self = shift;
1784 my($op, $cx) = @_;
3f872cb9 1785 if ($op->first->name =~ /^(i_)?negate$/) {
9d2c6865
SM
1786 # avoid --$x
1787 $self->pfixop($op, $cx, "-", 21.5);
1788 } else {
1789 $self->pfixop($op, $cx, "-", 21);
1790 }
1791}
1792sub pp_i_negate { pp_negate(@_) }
1793
1794sub pp_not {
1795 my $self = shift;
1796 my($op, $cx) = @_;
1797 if ($cx <= 4) {
1cabb3b3 1798 $self->listop($op, $cx, "not", $op->first);
9d2c6865
SM
1799 } else {
1800 $self->pfixop($op, $cx, "!", 21);
1801 }
1802}
1803
6e90668e
SM
1804sub unop {
1805 my $self = shift;
9c56d9ea 1806 my($op, $cx, $name, $nollafr) = @_;
6e90668e 1807 my $kid;
9d2c6865 1808 if ($op->flags & OPf_KIDS) {
aaf643ce 1809 $kid = $op->first;
1c85afce
YO
1810 if (not $name) {
1811 # this deals with 'boolkeys' right now
1812 return $self->deparse($kid,$cx);
1813 }
deb20ba3
RGS
1814 my $builtinname = $name;
1815 $builtinname =~ /^CORE::/ or $builtinname = "CORE::$name";
1816 if (defined prototype($builtinname)
1817 && prototype($builtinname) =~ /^;?\*/
e31885a0
RH
1818 && $kid->name eq "rv2gv") {
1819 $kid = $kid->first;
1820 }
1821
9c56d9ea
FC
1822 if ($nollafr) {
1823 ($kid = $self->deparse($kid, 16)) =~ s/^\cS//;
1824 return $self->maybe_parens(
1825 $self->keyword($name) . " $kid", $cx, 16
1826 );
1827 }
9d2c6865 1828 return $self->maybe_parens_unop($name, $kid, $cx);
6e90668e 1829 } else {
4d8ac5c7
FC
1830 return $self->maybe_parens(
1831 $self->keyword($name) . ($op->flags & OPf_SPECIAL ? "()" : ""),
1832 $cx, 16,
1833 );
6e90668e 1834 }
6e90668e
SM
1835}
1836
3ed82cfc
GS
1837sub pp_chop { maybe_targmy(@_, \&unop, "chop") }
1838sub pp_chomp { maybe_targmy(@_, \&unop, "chomp") }
1839sub pp_schop { maybe_targmy(@_, \&unop, "chop") }
1840sub pp_schomp { maybe_targmy(@_, \&unop, "chomp") }
6e90668e
SM
1841sub pp_defined { unop(@_, "defined") }
1842sub pp_undef { unop(@_, "undef") }
1843sub pp_study { unop(@_, "study") }
6e90668e
SM
1844sub pp_ref { unop(@_, "ref") }
1845sub pp_pos { maybe_local(@_, unop(@_, "pos")) }
1846
3ed82cfc
GS
1847sub pp_sin { maybe_targmy(@_, \&unop, "sin") }
1848sub pp_cos { maybe_targmy(@_, \&unop, "cos") }
1849sub pp_rand { maybe_targmy(@_, \&unop, "rand") }
6e90668e 1850sub pp_srand { unop(@_, "srand") }
3ed82cfc
GS
1851sub pp_exp { maybe_targmy(@_, \&unop, "exp") }
1852sub pp_log { maybe_targmy(@_, \&unop, "log") }
1853sub pp_sqrt { maybe_targmy(@_, \&unop, "sqrt") }
1854sub pp_int { maybe_targmy(@_, \&unop, "int") }
1855sub pp_hex { maybe_targmy(@_, \&unop, "hex") }
1856sub pp_oct { maybe_targmy(@_, \&unop, "oct") }
1857sub pp_abs { maybe_targmy(@_, \&unop, "abs") }
1858
1859sub pp_length { maybe_targmy(@_, \&unop, "length") }
1860sub pp_ord { maybe_targmy(@_, \&unop, "ord") }
1861sub pp_chr { maybe_targmy(@_, \&unop, "chr") }
6e90668e
SM
1862
1863sub pp_each { unop(@_, "each") }
1864sub pp_values { unop(@_, "values") }
1865sub pp_keys { unop(@_, "keys") }
09dcfa7d 1866{ no strict 'refs'; *{"pp_r$_"} = *{"pp_$_"} for qw< keys each values >; }
1c85afce
YO
1867sub pp_boolkeys {
1868 # no name because its an optimisation op that has no keyword
1869 unop(@_,"");
1870}
644741fd
NC
1871sub pp_aeach { unop(@_, "each") }
1872sub pp_avalues { unop(@_, "values") }
1873sub pp_akeys { unop(@_, "keys") }
6e90668e
SM
1874sub pp_pop { unop(@_, "pop") }
1875sub pp_shift { unop(@_, "shift") }
1876
1877sub pp_caller { unop(@_, "caller") }
1878sub pp_reset { unop(@_, "reset") }
1879sub pp_exit { unop(@_, "exit") }
1880sub pp_prototype { unop(@_, "prototype") }
1881
1882sub pp_close { unop(@_, "close") }
1883sub pp_fileno { unop(@_, "fileno") }
1884sub pp_umask { unop(@_, "umask") }
6e90668e
SM
1885sub pp_untie { unop(@_, "untie") }
1886sub pp_tied { unop(@_, "tied") }
1887sub pp_dbmclose { unop(@_, "dbmclose") }
1888sub pp_getc { unop(@_, "getc") }
1889sub pp_eof { unop(@_, "eof") }
1890sub pp_tell { unop(@_, "tell") }
1891sub pp_getsockname { unop(@_, "getsockname") }
1892sub pp_getpeername { unop(@_, "getpeername") }
1893
3ed82cfc
GS
1894sub pp_chdir { maybe_targmy(@_, \&unop, "chdir") }
1895sub pp_chroot { maybe_targmy(@_, \&unop, "chroot") }
6e90668e 1896sub pp_readlink { unop(@_, "readlink") }
3ed82cfc 1897sub pp_rmdir { maybe_targmy(@_, \&unop, "rmdir") }
6e90668e
SM
1898sub pp_readdir { unop(@_, "readdir") }
1899sub pp_telldir { unop(@_, "telldir") }
1900sub pp_rewinddir { unop(@_, "rewinddir") }
1901sub pp_closedir { unop(@_, "closedir") }
3ed82cfc 1902sub pp_getpgrp { maybe_targmy(@_, \&unop, "getpgrp") }
6e90668e
SM
1903sub pp_localtime { unop(@_, "localtime") }
1904sub pp_gmtime { unop(@_, "gmtime") }
1905sub pp_alarm { unop(@_, "alarm") }
3ed82cfc 1906sub pp_sleep { maybe_targmy(@_, \&unop, "sleep") }
6e90668e 1907
94bb57f9 1908sub pp_dofile {
9c56d9ea 1909 my $code = unop(@_, "do", 1); # llafr does not apply
8b46c09b 1910 if ($code =~ s/^((?:CORE::)?do) \{/$1({/) { $code .= ')' }
94bb57f9
FC
1911 $code;
1912}
7d789282
FC
1913sub pp_entereval {
1914 unop(
1915 @_,
1916 $_[1]->private & OPpEVAL_BYTES ? $_[0]->keyword('evalbytes') : "eval"
1917 )
1918}
6e90668e
SM
1919
1920sub pp_ghbyname { unop(@_, "gethostbyname") }
1921sub pp_gnbyname { unop(@_, "getnetbyname") }
1922sub pp_gpbyname { unop(@_, "getprotobyname") }
1923sub pp_shostent { unop(@_, "sethostent") }
1924sub pp_snetent { unop(@_, "setnetent") }
1925sub pp_sprotoent { unop(@_, "setprotoent") }
1926sub pp_sservent { unop(@_, "setservent") }
1927sub pp_gpwnam { unop(@_, "getpwnam") }
1928sub pp_gpwuid { unop(@_, "getpwuid") }
1929sub pp_ggrnam { unop(@_, "getgrnam") }
1930sub pp_ggrgid { unop(@_, "getgrgid") }
1931
1932sub pp_lock { unop(@_, "lock") }
1933
0d863452 1934sub pp_continue { unop(@_, "continue"); }
c08f093b 1935sub pp_break { unop(@_, "break"); }
0d863452
RH
1936
1937sub givwhen {
1938 my $self = shift;
1939 my($op, $cx, $givwhen) = @_;
1940
1941 my $enterop = $op->first;
1942 my ($head, $block);
1943 if ($enterop->flags & OPf_SPECIAL) {
80e3f4ad 1944 $head = $self->keyword("default");
0d863452
RH
1945 $block = $self->deparse($enterop->first, 0);
1946 }
1947 else {
1948 my $cond = $enterop->first;
1949 my $cond_str = $self->deparse($cond, 1);
1950 $head = "$givwhen ($cond_str)";
1951 $block = $self->deparse($cond->sibling, 0);
1952 }
1953
1954 return "$head {\n".
1955 "\t$block\n".
1956 "\b}\cK";
1957}
1958
80e3f4ad
FC
1959sub pp_leavegiven { givwhen(@_, $_[0]->keyword("given")); }
1960sub pp_leavewhen { givwhen(@_, $_[0]->keyword("when")); }
0d863452 1961
6e90668e
SM
1962sub pp_exists {
1963 my $self = shift;
9d2c6865 1964 my($op, $cx) = @_;
34a48b4b
RH
1965 my $arg;
1966 if ($op->private & OPpEXISTS_SUB) {
1967 # Checking for the existence of a subroutine
1968 return $self->maybe_parens_func("exists",
1969 $self->pp_rv2cv($op->first, 16), $cx, 16);
1970 }
1971 if ($op->flags & OPf_SPECIAL) {
1972 # Array element, not hash element
1973 return $self->maybe_parens_func("exists",
1974 $self->pp_aelem($op->first, 16), $cx, 16);
1975 }
9d2c6865
SM
1976 return $self->maybe_parens_func("exists", $self->pp_helem($op->first, 16),
1977 $cx, 16);
6e90668e
SM
1978}
1979
6e90668e
SM
1980sub pp_delete {
1981 my $self = shift;
9d2c6865 1982 my($op, $cx) = @_;
6e90668e
SM
1983 my $arg;
1984 if ($op->private & OPpSLICE) {
34a48b4b
RH
1985 if ($op->flags & OPf_SPECIAL) {
1986 # Deleting from an array, not a hash
1987 return $self->maybe_parens_func("delete",
1988 $self->pp_aslice($op->first, 16),
1989 $cx, 16);
1990 }
9d2c6865
SM
1991 return $self->maybe_parens_func("delete",
1992 $self->pp_hslice($op->first, 16),
1993 $cx, 16);
6e90668e 1994 } else {
34a48b4b
RH
1995 if ($op->flags & OPf_SPECIAL) {
1996 # Deleting from an array, not a hash
1997 return $self->maybe_parens_func("delete",
1998 $self->pp_aelem($op->first, 16),
1999 $cx, 16);
2000 }
9d2c6865
SM
2001 return $self->maybe_parens_func("delete",
2002 $self->pp_helem($op->first, 16),
2003 $cx, 16);
6e90668e 2004 }
6e90668e
SM
2005}
2006
6e90668e
SM
2007sub pp_require {
2008 my $self = shift;
9d2c6865 2009 my($op, $cx) = @_;
d5889722 2010 my $opname = $op->flags & OPf_SPECIAL ? 'CORE::require' : 'require';
3f872cb9 2011 if (class($op) eq "UNOP" and $op->first->name eq "const"
4c1f658f 2012 and $op->first->private & OPpCONST_BARE)
6e90668e 2013 {
18228111 2014 my $name = $self->const_sv($op->first)->PV;
6e90668e
SM
2015 $name =~ s[/][::]g;
2016 $name =~ s/\.pm//g;
41df74e3 2017 return $self->maybe_parens("$opname $name", $cx, 16);
6e90668e 2018 } else {
41df74e3
FC
2019 $self->unop(
2020 $op, $cx,
c75b4828
FC
2021 $op->first->name eq 'const'
2022 && $op->first->private & OPpCONST_NOVER
2023 ? "no"
2024 : $opname,
41df74e3
FC
2025 1, # llafr does not apply
2026 );
6e90668e
SM
2027 }
2028}
2029
d989cdac 2030sub pp_scalar {
9d2c6865 2031 my $self = shift;
d9002312 2032 my($op, $cx) = @_;
9d2c6865
SM
2033 my $kid = $op->first;
2034 if (not null $kid->sibling) {
2035 # XXX Was a here-doc
2036 return $self->dquote($op);
2037 }
2038 $self->unop(@_, "scalar");
2039}
2040
2041
6e90668e
SM
2042sub padval {
2043 my $self = shift;
2044 my $targ = shift;
d989cdac 2045 return $self->{'curcv'}->PADLIST->ARRAYelt(1)->ARRAYelt($targ);
6e90668e
SM
2046}
2047
78c72037
NC
2048sub anon_hash_or_list {
2049 my $self = shift;
d9002312 2050 my($op, $cx) = @_;
78c72037
NC
2051
2052 my($pre, $post) = @{{"anonlist" => ["[","]"],
2053 "anonhash" => ["{","}"]}->{$op->name}};
2054 my($expr, @exprs);
2055 $op = $op->first->sibling; # skip pushmark
2056 for (; !null($op); $op = $op->sibling) {
2057 $expr = $self->deparse($op, 6);
2058 push @exprs, $expr;
2059 }
d9002312
SM
2060 if ($pre eq "{" and $cx < 1) {
2061 # Disambiguate that it's not a block
2062 $pre = "+{";
2063 }
78c72037
NC
2064 return $pre . join(", ", @exprs) . $post;
2065}
2066
2067sub pp_anonlist {
d9002312
SM
2068 my $self = shift;
2069 my ($op, $cx) = @_;
78c72037 2070 if ($op->flags & OPf_SPECIAL) {
d9002312 2071 return $self->anon_hash_or_list($op, $cx);
78c72037
NC
2072 }
2073 warn "Unexpected op pp_" . $op->name() . " without OPf_SPECIAL";
2074 return 'XXX';
2075}
2076
2077*pp_anonhash = \&pp_anonlist;
2078
6e90668e
SM
2079sub pp_refgen {
2080 my $self = shift;
9d2c6865 2081 my($op, $cx) = @_;
6e90668e 2082 my $kid = $op->first;
3f872cb9 2083 if ($kid->name eq "null") {
6e90668e 2084 $kid = $kid->first;
35925e80 2085 if (!null($kid->sibling) and
3f872cb9 2086 $kid->sibling->name eq "anoncode") {
09d856fb 2087 return $self->e_anoncode({ code => $self->padval($kid->sibling->targ) });
3f872cb9
GS
2088 } elsif ($kid->name eq "pushmark") {
2089 my $sib_name = $kid->sibling->name;
2090 if ($sib_name =~ /^(pad|rv2)[ah]v$/
c8c62db7
AD
2091 and not $kid->sibling->flags & OPf_REF)
2092 {
2093 # The @a in \(@a) isn't in ref context, but only when the
2094 # parens are there.
127212b2 2095 return "\\(" . $self->pp_list($op->first) . ")";
3f872cb9 2096 } elsif ($sib_name eq 'entersub') {
c8c62db7
AD
2097 my $text = $self->deparse($kid->sibling, 1);
2098 # Always show parens for \(&func()), but only with -p otherwise
2099 $text = "($text)" if $self->{'parens'}
2100 or $kid->sibling->private & OPpENTERSUB_AMPER;
2101 return "\\$text";
2102 }
2103 }
6e90668e 2104 }
9d2c6865 2105 $self->pfixop($op, $cx, "\\", 20);
6e90668e
SM
2106}
2107
09d856fb
CK
2108sub e_anoncode {
2109 my ($self, $info) = @_;
2110 my $text = $self->deparse_sub($info->{code});
2111 return "sub " . $text;
2112}
2113
6e90668e
SM
2114sub pp_srefgen { pp_refgen(@_) }
2115
2116sub pp_readline {
2117 my $self = shift;
9d2c6865 2118 my($op, $cx) = @_;
6e90668e 2119 my $kid = $op->first;
3f872cb9 2120 $kid = $kid->first if $kid->name eq "rv2gv"; # <$fh>
e31885a0
RH
2121 return "<" . $self->deparse($kid, 1) . ">" if is_scalar($kid);
2122 return $self->unop($op, $cx, "readline");
6e90668e
SM
2123}
2124
ad8caead
RGS
2125sub pp_rcatline {
2126 my $self = shift;
2127 my($op) = @_;
d989cdac 2128 return "<" . $self->gv_name($self->gv_or_padgv($op)) . ">";
ad8caead
RGS
2129}
2130
bd0865ec
GS
2131# Unary operators that can occur as pseudo-listops inside double quotes
2132sub dq_unop {
2133 my $self = shift;
2134 my($op, $cx, $name, $prec, $flags) = (@_, 0, 0);
2135 my $kid;
2136 if ($op->flags & OPf_KIDS) {
2137 $kid = $op->first;
2138 # If there's more than one kid, the first is an ex-pushmark.
2139 $kid = $kid->sibling if not null $kid->sibling;
2140 return $self->maybe_parens_unop($name, $kid, $cx);
2141 } else {
d989cdac 2142 return $name . ($op->flags & OPf_SPECIAL ? "()" : "");
bd0865ec
GS
2143 }
2144}
2145
2146sub pp_ucfirst { dq_unop(@_, "ucfirst") }
2147sub pp_lcfirst { dq_unop(@_, "lcfirst") }
2148sub pp_uc { dq_unop(@_, "uc") }
2149sub pp_lc { dq_unop(@_, "lc") }
3ed82cfc 2150sub pp_quotemeta { maybe_targmy(@_, \&dq_unop, "quotemeta") }
838f2281 2151sub pp_fc { dq_unop(@_, "fc") }
bd0865ec 2152
6e90668e
SM
2153sub loopex {
2154 my $self = shift;
9d2c6865 2155 my ($op, $cx, $name) = @_;
6e90668e 2156 if (class($op) eq "PVOP") {
41df74e3 2157 $name .= " " . $op->pv;
9d2c6865 2158 } elsif (class($op) eq "OP") {
41df74e3 2159 # no-op
6e90668e 2160 } elsif (class($op) eq "UNOP") {
1eb0b7be 2161 (my $kid = $self->deparse($op->first, 7)) =~ s/^\cS//;
41df74e3 2162 $name .= " $kid";
6e90668e 2163 }
1eb0b7be 2164 return $self->maybe_parens($name, $cx, 7);
6e90668e
SM
2165}
2166
2167sub pp_last { loopex(@_, "last") }
2168sub pp_next { loopex(@_, "next") }
2169sub pp_redo { loopex(@_, "redo") }
2170sub pp_goto { loopex(@_, "goto") }
266da325 2171sub pp_dump { loopex(@_, "CORE::dump") }
6e90668e
SM
2172
2173sub ftst {
2174 my $self = shift;
9d2c6865 2175 my($op, $cx, $name) = @_;
6e90668e 2176 if (class($op) eq "UNOP") {
e38ccfd9 2177 # Genuine '-X' filetests are exempt from the LLAFR, but not
5830412d
FC
2178 # l?stat()
2179 if ($name =~ /^-/) {
2180 (my $kid = $self->deparse($op->first, 16)) =~ s/^\cS//;
2181 return $self->maybe_parens("$name $kid", $cx, 16);
2182 }
9d2c6865 2183 return $self->maybe_parens_unop($name, $op->first, $cx);
d989cdac 2184 } elsif (class($op) =~ /^(SV|PAD)OP$/) {
9d2c6865 2185 return $self->maybe_parens_func($name, $self->pp_gv($op, 1), $cx, 16);
6e90668e 2186 } else { # I don't think baseop filetests ever survive ck_ftst, but...
9d2c6865 2187 return $name;
6e90668e 2188 }
6e90668e
SM
2189}
2190
d989cdac
SM
2191sub pp_lstat { ftst(@_, "lstat") }
2192sub pp_stat { ftst(@_, "stat") }
2193sub pp_ftrread { ftst(@_, "-R") }
6e90668e 2194sub pp_ftrwrite { ftst(@_, "-W") }
d989cdac
SM
2195sub pp_ftrexec { ftst(@_, "-X") }
2196sub pp_fteread { ftst(@_, "-r") }
e31885a0 2197sub pp_ftewrite { ftst(@_, "-w") }
d989cdac
SM
2198sub pp_fteexec { ftst(@_, "-x") }
2199sub pp_ftis { ftst(@_, "-e") }
6e90668e
SM
2200sub pp_fteowned { ftst(@_, "-O") }
2201sub pp_ftrowned { ftst(@_, "-o") }
d989cdac
SM
2202sub pp_ftzero { ftst(@_, "-z") }
2203sub pp_ftsize { ftst(@_, "-s") }
2204sub pp_ftmtime { ftst(@_, "-M") }
2205sub pp_ftatime { ftst(@_, "-A") }
2206sub pp_ftctime { ftst(@_, "-C") }
2207sub pp_ftsock { ftst(@_, "-S") }
2208sub pp_ftchr { ftst(@_, "-c") }
2209sub pp_ftblk { ftst(@_, "-b") }
2210sub pp_ftfile { ftst(@_, "-f") }
2211sub pp_ftdir { ftst(@_, "-d") }
2212sub pp_ftpipe { ftst(@_, "-p") }
2213sub pp_ftlink { ftst(@_, "-l") }
2214sub pp_ftsuid { ftst(@_, "-u") }
2215sub pp_ftsgid { ftst(@_, "-g") }
2216sub pp_ftsvtx { ftst(@_, "-k") }
2217sub pp_fttty { ftst(@_, "-t") }
2218sub pp_fttext { ftst(@_, "-T") }
6e90668e
SM
2219sub pp_ftbinary { ftst(@_, "-B") }
2220
a798dbf2 2221sub SWAP_CHILDREN () { 1 }
6e90668e 2222sub ASSIGN () { 2 } # has OP= variant
7013e6ae 2223sub LIST_CONTEXT () { 4 } # Assignment is in list context
6e90668e 2224
9d2c6865
SM
2225my(%left, %right);
2226
2227sub assoc_class {
2228 my $op = shift;
3f872cb9
GS
2229 my $name = $op->name;
2230 if ($name eq "concat" and $op->first->name eq "concat") {
e38ccfd9 2231 # avoid spurious '=' -- see comment in pp_concat
3f872cb9 2232 return "concat";
9d2c6865 2233 }
3f872cb9
GS
2234 if ($name eq "null" and class($op) eq "UNOP"
2235 and $op->first->name =~ /^(and|x?or)$/
9d2c6865
SM
2236 and null $op->first->sibling)
2237 {
2238 # Like all conditional constructs, OP_ANDs and OP_ORs are topped
2239 # with a null that's used as the common end point of the two
2240 # flows of control. For precedence purposes, ignore it.
2241 # (COND_EXPRs have these too, but we don't bother with
2242 # their associativity).
2243 return assoc_class($op->first);
2244 }
2245 return $name . ($op->flags & OPf_STACKED ? "=" : "");
2246}
2247
e38ccfd9 2248# Left associative operators, like '+', for which
9d2c6865
SM
2249# $a + $b + $c is equivalent to ($a + $b) + $c
2250
2251BEGIN {
3f872cb9
GS
2252 %left = ('multiply' => 19, 'i_multiply' => 19,
2253 'divide' => 19, 'i_divide' => 19,
2254 'modulo' => 19, 'i_modulo' => 19,
2255 'repeat' => 19,
2256 'add' => 18, 'i_add' => 18,
2257 'subtract' => 18, 'i_subtract' => 18,
2258 'concat' => 18,
2259 'left_shift' => 17, 'right_shift' => 17,
2260 'bit_and' => 13,
2261 'bit_or' => 12, 'bit_xor' => 12,
2262 'and' => 3,
2263 'or' => 2, 'xor' => 2,
9d2c6865
SM
2264 );
2265}
2266
2267sub deparse_binop_left {
2268 my $self = shift;
2269 my($op, $left, $prec) = @_;
58231d39 2270 if ($left{assoc_class($op)} && $left{assoc_class($left)}
9d2c6865
SM
2271 and $left{assoc_class($op)} == $left{assoc_class($left)})
2272 {
2273 return $self->deparse($left, $prec - .00001);
2274 } else {
2275 return $self->deparse($left, $prec);
2276 }
2277}
2278
e38ccfd9 2279# Right associative operators, like '=', for which
9d2c6865
SM
2280# $a = $b = $c is equivalent to $a = ($b = $c)
2281
2282BEGIN {
3f872cb9
GS
2283 %right = ('pow' => 22,
2284 'sassign=' => 7, 'aassign=' => 7,
2285 'multiply=' => 7, 'i_multiply=' => 7,
2286 'divide=' => 7, 'i_divide=' => 7,
2287 'modulo=' => 7, 'i_modulo=' => 7,
2288 'repeat=' => 7,
2289 'add=' => 7, 'i_add=' => 7,
2290 'subtract=' => 7, 'i_subtract=' => 7,
2291 'concat=' => 7,
2292 'left_shift=' => 7, 'right_shift=' => 7,
2293 'bit_and=' => 7,
2294 'bit_or=' => 7, 'bit_xor=' => 7,
2295 'andassign' => 7,
2296 'orassign' => 7,
9d2c6865
SM
2297 );
2298}
2299
2300sub deparse_binop_right {
2301 my $self = shift;
2302 my($op, $right, $prec) = @_;
58231d39 2303 if ($right{assoc_class($op)} && $right{assoc_class($right)}
9d2c6865
SM
2304 and $right{assoc_class($op)} == $right{assoc_class($right)})
2305 {
2306 return $self->deparse($right, $prec - .00001);
2307 } else {
2308 return $self->deparse($right, $prec);
2309 }
2310}
2311
a798dbf2 2312sub binop {
6e90668e 2313 my $self = shift;
9d2c6865 2314 my ($op, $cx, $opname, $prec, $flags) = (@_, 0);
a798dbf2
MB
2315 my $left = $op->first;
2316 my $right = $op->last;
9d2c6865
SM
2317 my $eq = "";
2318 if ($op->flags & OPf_STACKED && $flags & ASSIGN) {
2319 $eq = "=";
2320 $prec = 7;
2321 }
a798dbf2
MB
2322 if ($flags & SWAP_CHILDREN) {
2323 ($left, $right) = ($right, $left);
2324 }
9d2c6865 2325 $left = $self->deparse_binop_left($op, $left, $prec);
90c0eb26
RH
2326 $left = "($left)" if $flags & LIST_CONTEXT
2327 && $left !~ /^(my|our|local|)[\@\(]/;
9d2c6865
SM
2328 $right = $self->deparse_binop_right($op, $right, $prec);
2329 return $self->maybe_parens("$left $opname$eq $right", $cx, $prec);
2330}
2331
3ed82cfc
GS
2332sub pp_add { maybe_targmy(@_, \&binop, "+", 18, ASSIGN) }
2333sub pp_multiply { maybe_targmy(@_, \&binop, "*", 19, ASSIGN) }
2334sub pp_subtract { maybe_targmy(@_, \&binop, "-",18, ASSIGN) }
2335sub pp_divide { maybe_targmy(@_, \&binop, "/", 19, ASSIGN) }
2336sub pp_modulo { maybe_targmy(@_, \&binop, "%", 19, ASSIGN) }
2337sub pp_i_add { maybe_targmy(@_, \&binop, "+", 18, ASSIGN) }
2338sub pp_i_multiply { maybe_targmy(@_, \&binop, "*", 19, ASSIGN) }
2339sub pp_i_subtract { maybe_targmy(@_, \&binop, "-", 18, ASSIGN) }
2340sub pp_i_divide { maybe_targmy(@_, \&binop, "/", 19, ASSIGN) }
2341sub pp_i_modulo { maybe_targmy(@_, \&binop, "%", 19, ASSIGN) }
2342sub pp_pow { maybe_targmy(@_, \&binop, "**", 22, ASSIGN) }
2343
2344sub pp_left_shift { maybe_targmy(@_, \&binop, "<<", 17, ASSIGN) }
2345sub pp_right_shift { maybe_targmy(@_, \&binop, ">>", 17, ASSIGN) }
2346sub pp_bit_and { maybe_targmy(@_, \&binop, "&", 13, ASSIGN) }
2347sub pp_bit_or { maybe_targmy(@_, \&binop, "|", 12, ASSIGN) }
2348sub pp_bit_xor { maybe_targmy(@_, \&binop, "^", 12, ASSIGN) }
9d2c6865
SM
2349
2350sub pp_eq { binop(@_, "==", 14) }
2351sub pp_ne { binop(@_, "!=", 14) }
2352sub pp_lt { binop(@_, "<", 15) }
2353sub pp_gt { binop(@_, ">", 15) }
2354sub pp_ge { binop(@_, ">=", 15) }
2355sub pp_le { binop(@_, "<=", 15) }
2356sub pp_ncmp { binop(@_, "<=>", 14) }
2357sub pp_i_eq { binop(@_, "==", 14) }
2358sub pp_i_ne { binop(@_, "!=", 14) }
2359sub pp_i_lt { binop(@_, "<", 15) }
2360sub pp_i_gt { binop(@_, ">", 15) }
2361sub pp_i_ge { binop(@_, ">=", 15) }
2362sub pp_i_le { binop(@_, "<=", 15) }
2363sub pp_i_ncmp { binop(@_, "<=>", 14) }
2364
2365sub pp_seq { binop(@_, "eq", 14) }
2366sub pp_sne { binop(@_, "ne", 14) }
2367sub pp_slt { binop(@_, "lt", 15) }
2368sub pp_sgt { binop(@_, "gt", 15) }
2369sub pp_sge { binop(@_, "ge", 15) }
2370sub pp_sle { binop(@_, "le", 15) }
2371sub pp_scmp { binop(@_, "cmp", 14) }
2372
2373sub pp_sassign { binop(@_, "=", 7, SWAP_CHILDREN) }
7013e6ae 2374sub pp_aassign { binop(@_, "=", 7, SWAP_CHILDREN | LIST_CONTEXT) }
6e90668e 2375
0d863452
RH
2376sub pp_smartmatch {
2377 my ($self, $op, $cx) = @_;
2378 if ($op->flags & OPf_SPECIAL) {
9210de83 2379 return $self->deparse($op->last, $cx);
0d863452
RH
2380 }
2381 else {
2382 binop(@_, "~~", 14);
2383 }
2384}
2385
e38ccfd9 2386# '.' is special because concats-of-concats are optimized to save copying
6e90668e 2387# by making all but the first concat stacked. The effect is as if the
e38ccfd9 2388# programmer had written '($a . $b) .= $c', except legal.
3ed82cfc
GS
2389sub pp_concat { maybe_targmy(@_, \&real_concat) }
2390sub real_concat {
6e90668e 2391 my $self = shift;
9d2c6865 2392 my($op, $cx) = @_;
6e90668e
SM
2393 my $left = $op->first;
2394 my $right = $op->last;
2395 my $eq = "";
9d2c6865 2396 my $prec = 18;
3f872cb9 2397 if ($op->flags & OPf_STACKED and $op->first->name ne "concat") {
6e90668e 2398 $eq = "=";
9d2c6865 2399 $prec = 7;
6e90668e 2400 }
9d2c6865
SM
2401 $left = $self->deparse_binop_left($op, $left, $prec);
2402 $right = $self->deparse_binop_right($op, $right, $prec);
2403 return $self->maybe_parens("$left .$eq $right", $cx, $prec);
6e90668e
SM
2404}
2405
e38ccfd9 2406# 'x' is weird when the left arg is a list
6e90668e
SM
2407sub pp_repeat {
2408 my $self = shift;
9d2c6865 2409 my($op, $cx) = @_;
6e90668e
SM
2410 my $left = $op->first;
2411 my $right = $op->last;
9d2c6865
SM
2412 my $eq = "";
2413 my $prec = 19;
2414 if ($op->flags & OPf_STACKED) {
2415 $eq = "=";
2416 $prec = 7;
2417 }
6e90668e
SM
2418 if (null($right)) { # list repeat; count is inside left-side ex-list
2419 my $kid = $left->first->sibling; # skip pushmark
2420 my @exprs;
2421 for (; !null($kid->sibling); $kid = $kid->sibling) {
9d2c6865 2422 push @exprs, $self->deparse($kid, 6);
6e90668e
SM
2423 }
2424 $right = $kid;
2425 $left = "(" . join(", ", @exprs). ")";
2426 } else {
9d2c6865 2427 $left = $self->deparse_binop_left($op, $left, $prec);
6e90668e 2428 }
9d2c6865
SM
2429 $right = $self->deparse_binop_right($op, $right, $prec);
2430 return $self->maybe_parens("$left x$eq $right", $cx, $prec);
6e90668e
SM
2431}
2432
2433sub range {
2434 my $self = shift;
9d2c6865 2435 my ($op, $cx, $type) = @_;
6e90668e
SM
2436 my $left = $op->first;
2437 my $right = $left->sibling;
9d2c6865
SM
2438 $left = $self->deparse($left, 9);
2439 $right = $self->deparse($right, 9);
2440 return $self->maybe_parens("$left $type $right", $cx, 9);
6e90668e
SM
2441}
2442
2443sub pp_flop {
2444 my $self = shift;
9d2c6865 2445 my($op, $cx) = @_;
6e90668e
SM
2446 my $flip = $op->first;
2447 my $type = ($flip->flags & OPf_SPECIAL) ? "..." : "..";
9d2c6865 2448 return $self->range($flip->first, $cx, $type);
6e90668e
SM
2449}
2450
2451# one-line while/until is handled in pp_leave
2452
2453sub logop {
2454 my $self = shift;
9d2c6865 2455 my ($op, $cx, $lowop, $lowprec, $highop, $highprec, $blockname) = @_;
6e90668e
SM
2456 my $left = $op->first;
2457 my $right = $op->first->sibling;
d989cdac 2458 if ($cx < 1 and is_scope($right) and $blockname
58cccf98
SM
2459 and $self->{'expand'} < 7)
2460 { # if ($a) {$b}
9d2c6865
SM
2461 $left = $self->deparse($left, 1);
2462 $right = $self->deparse($right, 0);
2463 return "$blockname ($left) {\n\t$right\n\b}\cK";
d989cdac 2464 } elsif ($cx < 1 and $blockname and not $self->{'parens'}
58cccf98 2465 and $self->{'expand'} < 7) { # $b if $a
9d2c6865
SM
2466 $right = $self->deparse($right, 1);
2467 $left = $self->deparse($left, 1);
2468 return "$right $blockname $left";
2469 } elsif ($cx > $lowprec and $highop) { # $a && $b
2470 $left = $self->deparse_binop_left($op, $left, $highprec);
2471 $right = $self->deparse_binop_right($op, $right, $highprec);
2472 return $self->maybe_parens("$left $highop $right", $cx, $highprec);
2473 } else { # $a and $b
2474 $left = $self->deparse_binop_left($op, $left, $lowprec);
2475 $right = $self->deparse_binop_right($op, $right, $lowprec);
d989cdac 2476 return $self->maybe_parens("$left $lowop $right", $cx, $lowprec);
9d2c6865
SM
2477 }
2478}
2479
2480sub pp_and { logop(@_, "and", 3, "&&", 11, "if") }
f4a44678 2481sub pp_or { logop(@_, "or", 2, "||", 10, "unless") }
5b99f273 2482sub pp_dor { logop(@_, "//", 10) }
3ed82cfc
GS
2483
2484# xor is syntactically a logop, but it's really a binop (contrary to
2485# old versions of opcode.pl). Syntax is what matters here.
9d2c6865 2486sub pp_xor { logop(@_, "xor", 2, "", 0, "") }
6e90668e
SM
2487
2488sub logassignop {
2489 my $self = shift;
9d2c6865 2490 my ($op, $cx, $opname) = @_;
6e90668e
SM
2491 my $left = $op->first;
2492 my $right = $op->first->sibling->first; # skip sassign
9d2c6865
SM
2493 $left = $self->deparse($left, 7);
2494 $right = $self->deparse($right, 7);
2495 return $self->maybe_parens("$left $opname $right", $cx, 7);
a798dbf2
MB
2496}
2497
6e90668e 2498sub pp_andassign { logassignop(@_, "&&=") }
c963b151
BD
2499sub pp_orassign { logassignop(@_, "||=") }
2500sub pp_dorassign { logassignop(@_, "//=") }
6e90668e 2501
b89b7257
FC
2502sub rv2gv_or_string {
2503 my($self,$op) = @_;
2504 if ($op->name eq "gv") { # could be open("open") or open("###")
be6cf5cf 2505 my($name,$quoted) =
1db94eeb 2506 $self->stash_variable_name("", $self->gv_or_padgv($op));
be6cf5cf 2507 $quoted ? $name : "*$name";
b89b7257
FC
2508 }
2509 else {
2510 $self->deparse($op, 6);
2511 }
2512}
2513
6e90668e
SM
2514sub listop {
2515 my $self = shift;
9c56d9ea 2516 my($op, $cx, $name, $kid, $nollafr) = @_;
9d2c6865
SM
2517 my(@exprs);
2518 my $parens = ($cx >= 5) || $self->{'parens'};
24fcb59f 2519 $kid ||= $op->first->sibling;
4d8ac5c7
FC
2520 # If there are no arguments, add final parentheses (or parenthesize the
2521 # whole thing if the llafr does not apply) to account for cases like
2522 # (return)+1 or setpgrp()+1. When the llafr does not apply, we use a
2523 # precedence of 6 (< comma), as "return, 1" does not need parentheses.
2524 if (null $kid) {
2525 return $nollafr
2526 ? $self->maybe_parens($self->keyword($name), $cx, 7)
2527 : $self->keyword($name) . '()' x (7 < $cx);
2528 }
e31885a0 2529 my $first;
fb725297 2530 $name = "socketpair" if $name eq "sockpair";
4a1ac32e 2531 my $fullname = $self->keyword($name);
b72c97e8
RGS
2532 my $proto = prototype("CORE::$name");
2533 if (defined $proto
2534 && $proto =~ /^;?\*/
2462c3cc 2535 && $kid->name eq "rv2gv" && !($kid->private & OPpLVAL_INTRO)) {
b89b7257 2536 $first = $self->rv2gv_or_string($kid->first);
e31885a0
RH
2537 }
2538 else {
2539 $first = $self->deparse($kid, 6);
2540 }
e99ebc55 2541 if ($name eq "chmod" && $first =~ /^\d+$/) {
a0035eb8 2542 $first = sprintf("%#o", $first);
e99ebc55 2543 }
9c56d9ea
FC
2544 $first = "+$first"
2545 if not $parens and not $nollafr and substr($first, 0, 1) eq "(";
9d2c6865
SM
2546 push @exprs, $first;
2547 $kid = $kid->sibling;
564cd6cb
FC
2548 if (defined $proto && $proto =~ /^\*\*/ && $kid->name eq "rv2gv"
2549 && !($kid->private & OPpLVAL_INTRO)) {
b89b7257 2550 push @exprs, $first = $self->rv2gv_or_string($kid->first);
b72c97e8
RGS
2551 $kid = $kid->sibling;
2552 }
9d2c6865
SM
2553 for (; !null($kid); $kid = $kid->sibling) {
2554 push @exprs, $self->deparse($kid, 6);
2555 }
689e417f 2556 if ($name eq "reverse" && ($op->private & OPpREVERSE_INPLACE)) {
4a1ac32e
FC
2557 return "$exprs[0] = $fullname"
2558 . ($parens ? "($exprs[0])" : " $exprs[0]");
689e417f 2559 }
9c56d9ea
FC
2560 if ($parens && $nollafr) {
2561 return "($fullname " . join(", ", @exprs) . ")";
2562 } elsif ($parens) {
4a1ac32e 2563 return "$fullname(" . join(", ", @exprs) . ")";
9d2c6865 2564 } else {
4a1ac32e 2565 return "$fullname " . join(", ", @exprs);
6e90668e 2566 }
6e90668e 2567}
a798dbf2 2568
6e90668e 2569sub pp_bless { listop(@_, "bless") }
3ed82cfc 2570sub pp_atan2 { maybe_targmy(@_, \&listop, "atan2") }
24fcb59f
FC
2571sub pp_substr {
2572 my ($self,$op,$cx) = @_;
2573 if ($op->private & OPpSUBSTR_REPL_FIRST) {
2574 return
2575 listop($self, $op, 7, "substr", $op->first->sibling->sibling)
2576 . " = "
2577 . $self->deparse($op->first->sibling, 7);
2578 }
2579 maybe_local(@_, listop(@_, "substr"))
2580}
6e90668e 2581sub pp_vec { maybe_local(@_, listop(@_, "vec")) }
3ed82cfc
GS
2582sub pp_index { maybe_targmy(@_, \&listop, "index") }
2583sub pp_rindex { maybe_targmy(@_, \&listop, "rindex") }
2584sub pp_sprintf { maybe_targmy(@_, \&listop, "sprintf") }
6e90668e 2585sub pp_formline { listop(@_, "formline") } # see also deparse_format
3ed82cfc 2586sub pp_crypt { maybe_targmy(@_, \&listop, "crypt") }
6e90668e
SM
2587sub pp_unpack { listop(@_, "unpack") }
2588sub pp_pack { listop(@_, "pack") }
3ed82cfc 2589sub pp_join { maybe_targmy(@_, \&listop, "join") }
6e90668e 2590sub pp_splice { listop(@_, "splice") }
3ed82cfc
GS
2591sub pp_push { maybe_targmy(@_, \&listop, "push") }
2592sub pp_unshift { maybe_targmy(@_, \&listop, "unshift") }
6e90668e
SM
2593sub pp_reverse { listop(@_, "reverse") }
2594sub pp_warn { listop(@_, "warn") }
2595sub pp_die { listop(@_, "die") }
9c56d9ea 2596sub pp_return { listop(@_, "return", undef, 1) } # llafr does not apply
6e90668e
SM
2597sub pp_open { listop(@_, "open") }
2598sub pp_pipe_op { listop(@_, "pipe") }
2599sub pp_tie { listop(@_, "tie") }
82bafd27 2600sub pp_binmode { listop(@_, "binmode") }
6e90668e
SM
2601sub pp_dbmopen { listop(@_, "dbmopen") }
2602sub pp_sselect { listop(@_, "select") }
2603sub pp_select { listop(@_, "select") }
2604sub pp_read { listop(@_, "read") }
2605sub pp_sysopen { listop(@_, "sysopen") }
2606sub pp_sysseek { listop(@_, "sysseek") }
2607sub pp_sysread { listop(@_, "sysread") }
2608sub pp_syswrite { listop(@_, "syswrite") }
2609sub pp_send { listop(@_, "send") }
2610sub pp_recv { listop(@_, "recv") }
2611sub pp_seek { listop(@_, "seek") }
6e90668e
SM
2612sub pp_fcntl { listop(@_, "fcntl") }
2613sub pp_ioctl { listop(@_, "ioctl") }
3ed82cfc 2614sub pp_flock { maybe_targmy(@_, \&listop, "flock") }
6e90668e
SM
2615sub pp_socket { listop(@_, "socket") }
2616sub pp_sockpair { listop(@_, "sockpair") }
2617sub pp_bind { listop(@_, "bind") }
2618sub pp_connect { listop(@_, "connect") }
2619sub pp_listen { listop(@_, "listen") }
2620sub pp_accept { listop(@_, "accept") }
2621sub pp_shutdown { listop(@_, "shutdown") }
2622sub pp_gsockopt { listop(@_, "getsockopt") }
2623sub pp_ssockopt { listop(@_, "setsockopt") }
3ed82cfc
GS
2624sub pp_chown { maybe_targmy(@_, \&listop, "chown") }
2625sub pp_unlink { maybe_targmy(@_, \&listop, "unlink") }
2626sub pp_chmod { maybe_targmy(@_, \&listop, "chmod") }
2627sub pp_utime { maybe_targmy(@_, \&listop, "utime") }
2628sub pp_rename { maybe_targmy(@_, \&listop, "rename") }
2629sub pp_link { maybe_targmy(@_, \&listop, "link") }
2630sub pp_symlink { maybe_targmy(@_, \&listop, "symlink") }
2631sub pp_mkdir { maybe_targmy(@_, \&listop, "mkdir") }
6e90668e
SM
2632sub pp_open_dir { listop(@_, "opendir") }
2633sub pp_seekdir { listop(@_, "seekdir") }
3ed82cfc
GS
2634sub pp_waitpid { maybe_targmy(@_, \&listop, "waitpid") }
2635sub pp_system { maybe_targmy(@_, \&listop, "system") }
2636sub pp_exec { maybe_targmy(@_, \&listop, "exec") }
2637sub pp_kill { maybe_targmy(@_, \&listop, "kill") }
2638sub pp_setpgrp { maybe_targmy(@_, \&listop, "setpgrp") }
2639sub pp_getpriority { maybe_targmy(@_, \&listop, "getpriority") }
2640sub pp_setpriority { maybe_targmy(@_, \&listop, "setpriority") }
6e90668e
SM
2641sub pp_shmget { listop(@_, "shmget") }
2642sub pp_shmctl { listop(@_, "shmctl") }
2643sub pp_shmread { listop(@_, "shmread") }
2644sub pp_shmwrite { listop(@_, "shmwrite") }
2645sub pp_msgget { listop(@_, "msgget") }
2646sub pp_msgctl { listop(@_, "msgctl") }
2647sub pp_msgsnd { listop(@_, "msgsnd") }
2648sub pp_msgrcv { listop(@_, "msgrcv") }
2649sub pp_semget { listop(@_, "semget") }
2650sub pp_semctl { listop(@_, "semctl") }
2651sub pp_semop { listop(@_, "semop") }
2652sub pp_ghbyaddr { listop(@_, "gethostbyaddr") }
2653sub pp_gnbyaddr { listop(@_, "getnetbyaddr") }
2654sub pp_gpbynumber { listop(@_, "getprotobynumber") }
2655sub pp_gsbyname { listop(@_, "getservbyname") }
2656sub pp_gsbyport { listop(@_, "getservbyport") }
2657sub pp_syscall { listop(@_, "syscall") }
2658
2659sub pp_glob {
2660 my $self = shift;
9d2c6865 2661 my($op, $cx) = @_;
6e90668e 2662 my $text = $self->dq($op->first->sibling); # skip pushmark
a32fbbd8
FC
2663 my $keyword =
2664 $op->flags & OPf_SPECIAL ? 'glob' : $self->keyword('glob');
6e90668e 2665 if ($text =~ /^\$?(\w|::|\`)+$/ # could look like a readline
a32fbbd8
FC
2666 or $keyword =~ /^CORE::/
2667 or $text =~ /[<>]/) {
2668 return "$keyword(" . single_delim('qq', '"', $text) . ')';
6e90668e
SM
2669 } else {
2670 return '<' . $text . '>';
2671 }
2672}
2673
f5aa8f4e
SM
2674# Truncate is special because OPf_SPECIAL makes a bareword first arg
2675# be a filehandle. This could probably be better fixed in the core
2676# by moving the GV lookup into ck_truc.
2677
2678sub pp_truncate {
2679 my $self = shift;
2680 my($op, $cx) = @_;
2681 my(@exprs);
2682 my $parens = ($cx >= 5) || $self->{'parens'};
2683 my $kid = $op->first->sibling;
acba1d67 2684 my $fh;
f5aa8f4e
SM
2685 if ($op->flags & OPf_SPECIAL) {
2686 # $kid is an OP_CONST
18228111 2687 $fh = $self->const_sv($kid)->PV;
f5aa8f4e
SM
2688 } else {
2689 $fh = $self->deparse($kid, 6);
2690 $fh = "+$fh" if not $parens and substr($fh, 0, 1) eq "(";
2691 }
2692 my $len = $self->deparse($kid->sibling, 6);
4a1ac32e 2693 my $name = $self->keyword('truncate');
f5aa8f4e 2694 if ($parens) {
4a1ac32e 2695 return "$name($fh, $len)";
f5aa8f4e 2696 } else {
4a1ac32e 2697 return "$name $fh, $len";
f5aa8f4e 2698 }
f5aa8f4e
SM
2699}
2700
6e90668e
SM
2701sub indirop {
2702 my $self = shift;
9d2c6865 2703 my($op, $cx, $name) = @_;
6e90668e 2704 my($expr, @exprs);
521795fe 2705 my $firstkid = my $kid = $op->first->sibling;
6e90668e
SM
2706 my $indir = "";
2707 if ($op->flags & OPf_STACKED) {
2708 $indir = $kid;
2709 $indir = $indir->first; # skip rv2gv
2710 if (is_scope($indir)) {
9d2c6865 2711 $indir = "{" . $self->deparse($indir, 0) . "}";
d989cdac 2712 $indir = "{;}" if $indir eq "{}";
c73811ab
RH
2713 } elsif ($indir->name eq "const" && $indir->private & OPpCONST_BARE) {
2714 $indir = $self->const_sv($indir)->PV;
6e90668e 2715 } else {
9d2c6865 2716 $indir = $self->deparse($indir, 24);
6e90668e
SM
2717 }
2718 $indir = $indir . " ";
2719 $kid = $kid->sibling;
2720 }
7e80da18 2721 if ($name eq "sort" && $op->private & (OPpSORT_NUMERIC | OPpSORT_INTEGER)) {
3ac6e0f9 2722 $indir = ($op->private & OPpSORT_DESCEND) ? '{$b <=> $a} '
7e80da18
RH
2723 : '{$a <=> $b} ';
2724 }
3ac6e0f9 2725 elsif ($name eq "sort" && $op->private & OPpSORT_DESCEND) {
7e80da18
RH
2726 $indir = '{$b cmp $a} ';
2727 }
6e90668e 2728 for (; !null($kid); $kid = $kid->sibling) {
521795fe 2729 $expr = $self->deparse($kid, !$indir && $kid == $firstkid && $name eq "sort" && $firstkid->name eq "entersub" ? 16 : 6);
6e90668e
SM
2730 push @exprs, $expr;
2731 }
4a1ac32e 2732 my $name2;
3ac6e0f9 2733 if ($name eq "sort" && $op->private & OPpSORT_REVERSE) {
4a1ac32e 2734 $name2 = $self->keyword('reverse') . ' ' . $self->keyword('sort');
3ac6e0f9 2735 }
4a1ac32e 2736 else { $name2 = $self->keyword($name) }
2b6e98cb 2737 if ($name eq "sort" && ($op->private & OPpSORT_INPLACE)) {
3ac6e0f9 2738 return "$exprs[0] = $name2 $indir $exprs[0]";
2b6e98cb
DM
2739 }
2740
d989cdac 2741 my $args = $indir . join(", ", @exprs);
521795fe 2742 if ($indir ne "" && $name eq "sort") {
d989cdac
SM
2743 # We don't want to say "sort(f 1, 2, 3)", since perl -w will
2744 # give bareword warnings in that case. Therefore if context
2745 # requires, we'll put parens around the outside "(sort f 1, 2,
2746 # 3)". Unfortunately, we'll currently think the parens are
3c4b39be 2747 # necessary more often that they really are, because we don't
d989cdac
SM
2748 # distinguish which side of an assignment we're on.
2749 if ($cx >= 5) {
3ac6e0f9 2750 return "($name2 $args)";
d989cdac 2751 } else {
3ac6e0f9 2752 return "$name2 $args";
d989cdac 2753 }
521795fe
FC
2754 } elsif (
2755 !$indir && $name eq "sort"
ca331985 2756 && !null($op->first->sibling)
521795fe
FC
2757 && $op->first->sibling->name eq 'entersub'
2758 ) {
2759 # We cannot say sort foo(bar), as foo will be interpreted as a
2760 # comparison routine. We have to say sort(...) in that case.
2761 return "$name2($args)";
d989cdac 2762 } else {
3ac6e0f9 2763 return $self->maybe_parens_func($name2, $args, $cx, 5);
d989cdac
SM
2764 }
2765
6e90668e
SM
2766}
2767
2768sub pp_prtf { indirop(@_, "printf") }
2769sub pp_print { indirop(@_, "print") }
9b08e3d3 2770sub pp_say { indirop(@_, "say") }
6e90668e
SM
2771sub pp_sort { indirop(@_, "sort") }
2772
2773sub mapop {
2774 my $self = shift;
9d2c6865 2775 my($op, $cx, $name) = @_;
6e90668e
SM
2776 my($expr, @exprs);
2777 my $kid = $op->first; # this is the (map|grep)start
2778 $kid = $kid->first->sibling; # skip a pushmark
2779 my $code = $kid->first; # skip a null
2780 if (is_scope $code) {
f4a44678 2781 $code = "{" . $self->deparse($code, 0) . "} ";
6e90668e 2782 } else {
9d2c6865 2783 $code = $self->deparse($code, 24) . ", ";
6e90668e
SM
2784 }
2785 $kid = $kid->sibling;
2786 for (; !null($kid); $kid = $kid->sibling) {
9d2c6865 2787 $expr = $self->deparse($kid, 6);
9a58b761 2788 push @exprs, $expr if defined $expr;
6e90668e 2789 }
9d2c6865 2790 return $self->maybe_parens_func($name, $code . join(", ", @exprs), $cx, 5);
6e90668e
SM
2791}
2792
d989cdac
SM
2793sub pp_mapwhile { mapop(@_, "map") }
2794sub pp_grepwhile { mapop(@_, "grep") }
11e09183
SP
2795sub pp_mapstart { baseop(@_, "map") }
2796sub pp_grepstart { baseop(@_, "grep") }
6e90668e
SM
2797
2798sub pp_list {
2799 my $self = shift;
9d2c6865 2800 my($op, $cx) = @_;
6e90668e
SM
2801 my($expr, @exprs);
2802 my $kid = $op->first->sibling; # skip pushmark
958ed56b 2803 return '' if class($kid) eq 'NULL';
6e90668e 2804 my $lop;
3462b4ac 2805 my $local = "either"; # could be local(...), my(...), state(...) or our(...)
6e90668e
SM
2806 for ($lop = $kid; !null($lop); $lop = $lop->sibling) {
2807 # This assumes that no other private flags equal 128, and that
2808 # OPs that store things other than flags in their op_private,
2809 # like OP_AELEMFAST, won't be immediate children of a list.
b8e103fc
RH
2810 #
2811 # OP_ENTERSUB can break this logic, so check for it.
2812 # I suspect that open and exit can too.
2813
2814 if (!($lop->private & (OPpLVAL_INTRO|OPpOUR_INTRO)
ce4e655d 2815 or $lop->name eq "undef")
b8e103fc
RH
2816 or $lop->name eq "entersub"
2817 or $lop->name eq "exit"
2818 or $lop->name eq "open")
6e90668e
SM
2819 {
2820 $local = ""; # or not
2821 last;
2822 }
3462b4ac
RGS
2823 if ($lop->name =~ /^pad[ash]v$/) {
2824 if ($lop->private & OPpPAD_STATE) { # state()
2825 ($local = "", last) if $local =~ /^(?:local|our|my)$/;
2826 $local = "state";
2827 } else { # my()
2828 ($local = "", last) if $local =~ /^(?:local|our|state)$/;
2829 $local = "my";
2830 }
b8e103fc
RH
2831 } elsif ($lop->name =~ /^(gv|rv2)[ash]v$/
2832 && $lop->private & OPpOUR_INTRO
2833 or $lop->name eq "null" && $lop->first->name eq "gvsv"
2834 && $lop->first->private & OPpOUR_INTRO) { # our()
3462b4ac 2835 ($local = "", last) if $local =~ /^(?:my|local|state)$/;
ce4e655d 2836 $local = "our";
3ac6e0f9
RGS
2837 } elsif ($lop->name ne "undef"
2838 # specifically avoid the "reverse sort" optimisation,
2839 # where "reverse" is nullified
36d57d93 2840 && !($lop->name eq 'sort' && ($lop->flags & OPpSORT_REVERSE)))
3ac6e0f9
RGS
2841 {
2842 # local()
3462b4ac 2843 ($local = "", last) if $local =~ /^(?:my|our|state)$/;
6e90668e
SM
2844 $local = "local";
2845 }
2846 }
2847 $local = "" if $local eq "either"; # no point if it's all undefs
f5aa8f4e 2848 return $self->deparse($kid, $cx) if null $kid->sibling and not $local;
6e90668e
SM
2849 for (; !null($kid); $kid = $kid->sibling) {
2850 if ($local) {
3f872cb9 2851 if (class($kid) eq "UNOP" and $kid->first->name eq "gvsv") {
6e90668e
SM
2852 $lop = $kid->first;
2853 } else {
2854 $lop = $kid;
2855 }
2856 $self->{'avoid_local'}{$$lop}++;
9d2c6865 2857 $expr = $self->deparse($kid, 6);
6e90668e
SM
2858 delete $self->{'avoid_local'}{$$lop};
2859 } else {
9d2c6865 2860 $expr = $self->deparse($kid, 6);
6e90668e
SM
2861 }
2862 push @exprs, $expr;
2863 }
9d2c6865
SM
2864 if ($local) {
2865 return "$local(" . join(", ", @exprs) . ")";
2866 } else {
2867 return $self->maybe_parens( join(", ", @exprs), $cx, 6);
2868 }
6e90668e
SM
2869}
2870
6f611a1a
GS
2871sub is_ifelse_cont {
2872 my $op = shift;
2873 return ($op->name eq "null" and class($op) eq "UNOP"
2874 and $op->first->name =~ /^(and|cond_expr)$/
2875 and is_scope($op->first->first->sibling));
2876}
2877
6e90668e
SM
2878sub pp_cond_expr {
2879 my $self = shift;
9d2c6865 2880 my($op, $cx) = @_;
6e90668e
SM
2881 my $cond = $op->first;
2882 my $true = $cond->sibling;
2883 my $false = $true->sibling;
9d2c6865 2884 my $cuddle = $self->{'cuddle'};
d989cdac 2885 unless ($cx < 1 and (is_scope($true) and $true->name ne "null") and
58cccf98
SM
2886 (is_scope($false) || is_ifelse_cont($false))
2887 and $self->{'expand'} < 7) {
f5aa8f4e 2888 $cond = $self->deparse($cond, 8);
cfaba469 2889 $true = $self->deparse($true, 6);
9d2c6865
SM
2890 $false = $self->deparse($false, 8);
2891 return $self->maybe_parens("$cond ? $true : $false", $cx, 8);
6f611a1a
GS
2892 }
2893
f5aa8f4e 2894 $cond = $self->deparse($cond, 1);
d989cdac 2895 $true = $self->deparse($true, 0);
6f611a1a
GS
2896 my $head = "if ($cond) {\n\t$true\n\b}";
2897 my @elsifs;
2898 while (!null($false) and is_ifelse_cont($false)) {
2899 my $newop = $false->first;
2900 my $newcond = $newop->first;
2901 my $newtrue = $newcond->sibling;
2902 $false = $newtrue->sibling; # last in chain is OP_AND => no else
7ecdd211
PJ
2903 if ($newcond->name eq "lineseq")
2904 {
2905 # lineseq to ensure correct line numbers in elsif()
2906 # Bug #37302 fixed by change #33710.
2907 $newcond = $newcond->first->sibling;
2908 }
6f611a1a
GS
2909 $newcond = $self->deparse($newcond, 1);
2910 $newtrue = $self->deparse($newtrue, 0);
2911 push @elsifs, "elsif ($newcond) {\n\t$newtrue\n\b}";
2912 }
d989cdac 2913 if (!null($false)) {
6f611a1a
GS
2914 $false = $cuddle . "else {\n\t" .
2915 $self->deparse($false, 0) . "\n\b}\cK";
2916 } else {
2917 $false = "\cK";
6e90668e 2918 }
d989cdac 2919 return $head . join($cuddle, "", @elsifs) . $false;
6e90668e
SM
2920}
2921
95562366
NC
2922sub pp_once {
2923 my ($self, $op, $cx) = @_;
2924 my $cond = $op->first;
2925 my $true = $cond->sibling;
2926
2927 return $self->deparse($true, $cx);
2928}
2929
58cccf98 2930sub loop_common {
6e90668e 2931 my $self = shift;
58cccf98 2932 my($op, $cx, $init) = @_;
6e90668e
SM
2933 my $enter = $op->first;
2934 my $kid = $enter->sibling;
0ced6c29
RGS
2935 local(@$self{qw'curstash warnings hints hinthash'})
2936 = @$self{qw'curstash warnings hints hinthash'};
6e90668e 2937 my $head = "";
9d2c6865 2938 my $bare = 0;
58cccf98
SM
2939 my $body;
2940 my $cond = undef;
d989cdac 2941 if ($kid->name eq "lineseq") { # bare or infinite loop
241416b8 2942 if ($kid->last->name eq "unstack") { # infinite
e99ebc55 2943 $head = "while (1) "; # Can't use for(;;) if there's a continue
58cccf98 2944 $cond = "";
9d2c6865
SM
2945 } else {
2946 $bare = 1;
6e90668e 2947 }
58cccf98 2948 $body = $kid;
3f872cb9 2949 } elsif ($enter->name eq "enteriter") { # foreach
6e90668e
SM
2950 my $ary = $enter->first->sibling; # first was pushmark
2951 my $var = $ary->sibling;
36d57d93
RGS
2952 if ($ary->name eq 'null' and $enter->private & OPpITER_REVERSED) {
2953 # "reverse" was optimised away
aae53c41 2954 $ary = listop($self, $ary->first->sibling, 1, 'reverse');
36d57d93 2955 } elsif ($enter->flags & OPf_STACKED
f5aa8f4e
SM
2956 and not null $ary->first->sibling->sibling)
2957 {
d7f5b6da
SM
2958 $ary = $self->deparse($ary->first->sibling, 9) . " .. " .
2959 $self->deparse($ary->first->sibling->sibling, 9);
d8d95777
GA
2960 } else {
2961 $ary = $self->deparse($ary, 1);
2962 }
6e90668e 2963 if (null $var) {
823eff14
NC
2964 if (($enter->flags & OPf_SPECIAL) && ($] < 5.009)) {
2965 # thread special var, under 5005threads
9d2c6865 2966 $var = $self->pp_threadsv($enter, 1);
f6f9bdb7 2967 } else { # regular my() variable
9d2c6865 2968 $var = $self->pp_padsv($enter, 1);
6e90668e 2969 }
3f872cb9 2970 } elsif ($var->name eq "rv2gv") {
9d2c6865 2971 $var = $self->pp_rv2sv($var, 1);
241416b8
DM
2972 if ($enter->private & OPpOUR_INTRO) {
2973 # our declarations don't have package names
2974 $var =~ s/^(.).*::/$1/;
2975 $var = "our $var";
2976 }
3f872cb9 2977 } elsif ($var->name eq "gv") {
9d2c6865 2978 $var = "\$" . $self->deparse($var, 1);
6e90668e 2979 }
58cccf98 2980 $body = $kid->first->first->sibling; # skip OP_AND and OP_ITER
afb60448 2981 if (!is_state $body->first and $body->first->name !~ /^(?:stub|leave|scope)$/) {
cf24a840
SM
2982 confess unless $var eq '$_';
2983 $body = $body->first;
2984 return $self->deparse($body, 2) . " foreach ($ary)";
2985 }
2986 $head = "foreach $var ($ary) ";
3f872cb9 2987 } elsif ($kid->name eq "null") { # while/until
6e90668e 2988 $kid = $kid->first;
58cccf98
SM
2989 my $name = {"and" => "while", "or" => "until"}->{$kid->name};
2990 $cond = $self->deparse($kid->first, 1);
2991 $head = "$name ($cond) ";
2992 $body = $kid->first->sibling;
3f872cb9 2993 } elsif ($kid->name eq "stub") { # bare and empty
9d2c6865 2994 return "{;}"; # {} could be a hashref
6e90668e 2995 }
58cccf98 2996 # If there isn't a continue block, then the next pointer for the loop
241416b8 2997 # will point to the unstack, which is kid's last child, except
58cccf98 2998 # in a bare loop, when it will point to the leaveloop. When neither of
241416b8 2999 # these conditions hold, then the second-to-last child is the continue
58cccf98
SM
3000 # block (or the last in a bare loop).
3001 my $cont_start = $enter->nextop;
3002 my $cont;
241416b8 3003 if ($$cont_start != $$op && ${$cont_start} != ${$body->last}) {
58cccf98
SM
3004 if ($bare) {
3005 $cont = $body->last;
3006 } else {
3007 $cont = $body->first;
241416b8 3008 while (!null($cont->sibling->sibling)) {
58cccf98
SM
3009 $cont = $cont->sibling;
3010 }
3011 }
3012 my $state = $body->first;
3013 my $cuddle = $self->{'cuddle'};
3014 my @states;
3015 for (; $$state != $$cont; $state = $state->sibling) {
3016 push @states, $state;
3017 }
93a8ff62 3018 $body = $self->lineseq(undef, 0, @states);
58cccf98
SM
3019 if (defined $cond and not is_scope $cont and $self->{'expand'} < 3) {
3020 $head = "for ($init; $cond; " . $self->deparse($cont, 1) .") ";
3021 $cont = "\cK";
3022 } else {
3023 $cont = $cuddle . "continue {\n\t" .
3024 $self->deparse($cont, 0) . "\n\b}\cK";
6e90668e 3025 }
6e90668e 3026 } else {
7a9b44b9 3027 return "" if !defined $body;
c73811ab
RH
3028 if (length $init) {
3029 $head = "for ($init; $cond;) ";
3030 }
9d2c6865 3031 $cont = "\cK";
58cccf98 3032 $body = $self->deparse($body, 0);
6e90668e 3033 }
ce4e655d 3034 $body =~ s/;?$/;\n/;
34a48b4b
RH
3035
3036 return $head . "{\n\t" . $body . "\b}" . $cont;
58cccf98
SM
3037}
3038
09d856fb 3039sub pp_leaveloop { shift->loop_common(@_, "") }
58cccf98
SM
3040
3041sub for_loop {
3042 my $self = shift;
3043 my($op, $cx) = @_;
3044 my $init = $self->deparse($op, 1);
eae48c89
Z
3045 my $s = $op->sibling;
3046 my $ll = $s->name eq "unstack" ? $s->sibling : $s->first->sibling;
3047 return $self->loop_common($ll, $cx, $init);
6e90668e
SM
3048}
3049
3050sub pp_leavetry {
3051 my $self = shift;
9d2c6865 3052 return "eval {\n\t" . $self->pp_leave(@_) . "\n\b}";
bd0865ec 3053}
6e90668e 3054
a3ba843f
FC
3055BEGIN { for (qw[ const stringify rv2sv list glob ]) {
3056 eval "sub OP_\U$_ () { " . opnumber($_) . "}"
3057}}
f5aa8f4e 3058
a798dbf2 3059sub pp_null {
6e90668e 3060 my $self = shift;
d989cdac 3061 my($op, $cx) = @_;
6e90668e 3062 if (class($op) eq "OP") {
f4a44678
SM
3063 # old value is lost
3064 return $self->{'ex_const'} if $op->targ == OP_CONST;
3f872cb9 3065 } elsif ($op->first->name eq "pushmark") {
9d2c6865 3066 return $self->pp_list($op, $cx);
3f872cb9 3067 } elsif ($op->first->name eq "enter") {
9d2c6865 3068 return $self->pp_leave($op, $cx);
31c6271a
RD
3069 } elsif ($op->first->name eq "leave") {
3070 return $self->pp_leave($op->first, $cx);
3071 } elsif ($op->first->name eq "scope") {
3072 return $self->pp_scope($op->first, $cx);
bd0865ec 3073 } elsif ($op->targ == OP_STRINGIFY) {
6f611a1a 3074 return $self->dquote($op, $cx);
f4002a4b
FC
3075 } elsif ($op->targ == OP_GLOB) {
3076 return $self->pp_glob(
3077 $op->first # entersub
3078 ->first # ex-list
3079 ->first # pushmark
3080 ->sibling, # glob
3081 $cx
3082 );
6e90668e 3083 } elsif (!null($op->first->sibling) and
3f872cb9 3084 $op->first->sibling->name eq "readline" and
6e90668e 3085 $op->first->sibling->flags & OPf_STACKED) {
9d2c6865
SM
3086 return $self->maybe_parens($self->deparse($op->first, 7) . " = "
3087 . $self->deparse($op->first->sibling, 7),
3088 $cx, 7);
6e90668e 3089 } elsif (!null($op->first->sibling) and
3f872cb9 3090 $op->first->sibling->name eq "trans" and
6e90668e 3091 $op->first->sibling->flags & OPf_STACKED) {
9d2c6865
SM
3092 return $self->maybe_parens($self->deparse($op->first, 20) . " =~ "
3093 . $self->deparse($op->first->sibling, 20),
3094 $cx, 20);
d989cdac
SM
3095 } elsif ($op->flags & OPf_SPECIAL && $cx < 1 && !$op->targ) {
3096 return "do {\n\t". $self->deparse($op->first, $cx) ."\n\b};";
ad8caead
RGS
3097 } elsif (!null($op->first->sibling) and
3098 $op->first->sibling->name eq "null" and
3099 class($op->first->sibling) eq "UNOP" and
3100 $op->first->sibling->first->flags & OPf_STACKED and
3101 $op->first->sibling->first->name eq "rcatline") {
3102 return $self->maybe_parens($self->deparse($op->first, 18) . " .= "
3103 . $self->deparse($op->first->sibling, 18),
3104 $cx, 18);
6e90668e 3105 } else {
9d2c6865 3106 return $self->deparse($op->first, $cx);
6e90668e 3107 }
a798dbf2
MB
3108}
3109
6e90668e
SM
3110sub padname {
3111 my $self = shift;
3112 my $targ = shift;
68223ea3 3113 return $self->padname_sv($targ)->PVX;
6e90668e
SM
3114}
3115
3116sub padany {
3117 my $self = shift;
3118 my $op = shift;
3119 return substr($self->padname($op->targ), 1); # skip $/@/%
3120}
3121
3122sub pp_padsv {
3123 my $self = shift;
9d2c6865
SM
3124 my($op, $cx) = @_;
3125 return $self->maybe_my($op, $cx, $self->padname($op->targ));
6e90668e
SM
3126}
3127
3128sub pp_padav { pp_padsv(@_) }
3129sub pp_padhv { pp_padsv(@_) }
3130
e0ab66ad 3131my @threadsv_names = B::threadsv_names;
f6f9bdb7
SM
3132sub pp_threadsv {
3133 my $self = shift;
9d2c6865
SM
3134 my($op, $cx) = @_;
3135 return $self->maybe_local($op, $cx, "\$" . $threadsv_names[$op->targ]);
d989cdac 3136}
f6f9bdb7 3137
6f611a1a 3138sub gv_or_padgv {
18228111
GS
3139 my $self = shift;
3140 my $op = shift;
6f611a1a
GS
3141 if (class($op) eq "PADOP") {
3142 return $self->padval($op->padix);
3143 } else { # class($op) eq "SVOP"
3144 return $op->gv;
18228111 3145 }
18228111
GS
3146}
3147
6e90668e
SM
3148sub pp_gvsv {
3149 my $self = shift;
9d2c6865 3150 my($op, $cx) = @_;
6f611a1a 3151 my $gv = $self->gv_or_padgv($op);
8510e997 3152 return $self->maybe_local($op, $cx, $self->stash_variable("\$",
bb8996b8 3153 $self->gv_name($gv), $cx));
6e90668e
SM
3154}
3155
3156sub pp_gv {
3157 my $self = shift;
9d2c6865 3158 my($op, $cx) = @_;
6f611a1a 3159 my $gv = $self->gv_or_padgv($op);
18228111 3160 return $self->gv_name($gv);
6e90668e
SM
3161}
3162
93bad3fd
NC
3163sub pp_aelemfast_lex {
3164 my $self = shift;
3165 my($op, $cx) = @_;
3166 my $name = $self->padname($op->targ);
3167 $name =~ s/^@/\$/;
bc6b2ef6 3168 return $name . "[" . ($op->private + $self->{'arybase'}) . "]";
93bad3fd
NC
3169}
3170
6e90668e
SM
3171sub pp_aelemfast {
3172 my $self = shift;
9d2c6865 3173 my($op, $cx) = @_;
93bad3fd
NC
3174 # optimised PADAV, pre 5.15
3175 return $self->pp_aelemfast_lex(@_) if ($op->flags & OPf_SPECIAL);
ce4e655d 3176
93bad3fd 3177 my $gv = $self->gv_or_padgv($op);
be6cf5cf
FC
3178 my($name,$quoted) = $self->stash_variable_name('@',$gv);
3179 $name = $quoted ? "$name->" : '$' . $name;
bc6b2ef6 3180 return $name . "[" . ($op->private + $self->{'arybase'}) . "]";
6e90668e
SM
3181}
3182
3183sub rv2x {
3184 my $self = shift;
9d2c6865 3185 my($op, $cx, $type) = @_;
90c0eb26
RH
3186
3187 if (class($op) eq 'NULL' || !$op->can("first")) {
ff97752d 3188 carp("Unexpected op in pp_rv2x");
90c0eb26
RH
3189 return 'XXX';
3190 }
6e90668e 3191 my $kid = $op->first;
d989cdac 3192 if ($kid->name eq "gv") {
bb8996b8 3193 return $self->stash_variable($type, $self->deparse($kid, 0), $cx);
d989cdac
SM
3194 } elsif (is_scalar $kid) {
3195 my $str = $self->deparse($kid, 0);
3196 if ($str =~ /^\$([^\w\d])\z/) {
3197 # "$$+" isn't a legal way to write the scalar dereference
3198 # of $+, since the lexer can't tell you aren't trying to
3199 # do something like "$$ + 1" to get one more than your
3200 # PID. Either "${$+}" or "$${+}" are workable
3201 # disambiguations, but if the programmer did the former,
3202 # they'd be in the "else" clause below rather than here.
3203 # It's not clear if this should somehow be unified with
3204 # the code in dq and re_dq that also adds lexer
3205 # disambiguation braces.
3206 $str = '$' . "{$1}"; #'
3207 }
3208 return $type . $str;
3209 } else {
3210 return $type . "{" . $self->deparse($kid, 0) . "}";
3211 }
6e90668e
SM
3212}
3213
3214sub pp_rv2sv { maybe_local(@_, rv2x(@_, "\$")) }
3215sub pp_rv2hv { maybe_local(@_, rv2x(@_, "%")) }
3216sub pp_rv2gv { maybe_local(@_, rv2x(@_, "*")) }
3217
3218# skip rv2av
3219sub pp_av2arylen {
3220 my $self = shift;
9d2c6865 3221 my($op, $cx) = @_;
3f872cb9 3222 if ($op->first->name eq "padav") {
9d2c6865 3223 return $self->maybe_local($op, $cx, '$#' . $self->padany($op->first));
6e90668e 3224 } else {
f5aa8f4e
SM
3225 return $self->maybe_local($op, $cx,
3226 $self->rv2x($op->first, $cx, '$#'));
6e90668e
SM
3227 }
3228}
3229
3230# skip down to the old, ex-rv2cv
90c0eb26
RH
3231sub pp_rv2cv {
3232 my ($self, $op, $cx) = @_;
3233 if (!null($op->first) && $op->first->name eq 'null' &&
3234 $op->first->targ eq OP_LIST)
3235 {
3236 return $self->rv2x($op->first->first->sibling, $cx, "&")
3237 }
3238 else {
3239 return $self->rv2x($op, $cx, "")
3240 }
3241}
6e90668e 3242
d989cdac
SM
3243sub list_const {
3244 my $self = shift;
3245 my($cx, @list) = @_;
3246 my @a = map $self->const($_, 6), @list;
3247 if (@a == 0) {
3248 return "()";
3249 } elsif (@a == 1) {
3250 return $a[0];
3251 } elsif ( @a > 2 and !grep(!/^-?\d+$/, @a)) {
3252 # collapse (-1,0,1,2) into (-1..2)
3253 my ($s, $e) = @a[0,-1];
3254 my $i = $s;
3255 return $self->maybe_parens("$s..$e", $cx, 9)
3256 unless grep $i++ != $_, @a;
3257 }
3258 return $self->maybe_parens(join(", ", @a), $cx, 6);
3259}
3260
6e90668e
SM
3261sub pp_rv2av {
3262 my $self = shift;
9d2c6865 3263 my($op, $cx) = @_;
6e90668e 3264 my $kid = $op->first;
3f872cb9 3265 if ($kid->name eq "const") { # constant list
18228111 3266 my $av = $self->const_sv($kid);
d989cdac 3267 return $self->list_const($cx, $av->ARRAY);
6e90668e 3268 } else {
9d2c6865 3269 return $self->maybe_local($op, $cx, $self->rv2x($op, $cx, "\@"));
6e90668e
SM
3270 }
3271 }
3272
3ed82cfc
GS
3273sub is_subscriptable {
3274 my $op = shift;
3275 if ($op->name =~ /^[ahg]elem/) {
3276 return 1;
3277 } elsif ($op->name eq "entersub") {
3278 my $kid = $op->first;
3279 return 0 unless null $kid->sibling;
3280 $kid = $kid->first;
3281 $kid = $kid->sibling until null $kid->sibling;
3282 return 0 if is_scope($kid);
3283 $kid = $kid->first;
3284 return 0 if $kid->name eq "gv";
3285 return 0 if is_scalar($kid);
3286 return is_subscriptable($kid);
3287 } else {
3288 return 0;
3289 }
3290}
6e90668e 3291
21b7468a
BL
3292sub elem_or_slice_array_name
3293{
6e90668e 3294 my $self = shift;
21b7468a
BL
3295 my ($array, $left, $padname, $allow_arrow) = @_;
3296
3f872cb9 3297 if ($array->name eq $padname) {
21b7468a 3298 return $self->padany($array);
6e90668e 3299 } elsif (is_scope($array)) { # ${expr}[0]
21b7468a 3300 return "{" . $self->deparse($array, 0) . "}";
ce4e655d 3301 } elsif ($array->name eq "gv") {
10e8e32b
FC
3302 ($array, my $quoted) =
3303 $self->stash_variable_name(
3304 $left eq '[' ? '@' : '%', $self->gv_or_padgv($array)
3305 );
3306 if (!$allow_arrow && $quoted) {
3307 # This cannot happen.
3308 die "Invalid variable name $array for slice";
ce4e655d 3309 }
10e8e32b 3310 return $quoted ? "$array->" : $array;
21b7468a
BL
3311 } elsif (!$allow_arrow || is_scalar $array) { # $x[0], $$x[0], ...
3312 return $self->deparse($array, 24);
6e90668e 3313 } else {
21b7468a 3314 return undef;
6e90668e 3315 }
21b7468a
BL
3316}
3317
3318sub elem_or_slice_single_index
3319{
3320 my $self = shift;
3321 my ($idx) = @_;
3322
9d2c6865 3323 $idx = $self->deparse($idx, 1);
7a9b44b9
RH
3324
3325 # Outer parens in an array index will confuse perl
3326 # if we're interpolating in a regular expression, i.e.
3327 # /$x$foo[(-1)]/ is *not* the same as /$x$foo[-1]/
3328 #
3329 # If $self->{parens}, then an initial '(' will
3330 # definitely be paired with a final ')'. If
3331 # !$self->{parens}, the misleading parens won't
3332 # have been added in the first place.
3333 #
3334 # [You might think that we could get "(...)...(...)"
3335 # where the initial and final parens do not match
3336 # each other. But we can't, because the above would
3337 # only happen if there's an infix binop between the
3338 # two pairs of parens, and *that* means that the whole
3339 # expression would be parenthesized as well.]
3340 #
3341 $idx =~ s/^\((.*)\)$/$1/ if $self->{'parens'};
3342
098251bc
RH
3343 # Hash-element braces will autoquote a bareword inside themselves.
3344 # We need to make sure that C<$hash{warn()}> doesn't come out as
3345 # C<$hash{warn}>, which has a quite different meaning. Currently
3346 # B::Deparse will always quote strings, even if the string was a
3347 # bareword in the original (i.e. the OPpCONST_BARE flag is ignored
3348 # for constant strings.) So we can cheat slightly here - if we see
3349 # a bareword, we know that it is supposed to be a function call.
3350 #
3351 $idx =~ s/^([A-Za-z_]\w*)$/$1()/;
3352
21b7468a
BL
3353 return $idx;
3354}
3355
3356sub elem {
3357 my $self = shift;
3358 my ($op, $cx, $left, $right, $padname) = @_;
3359 my($array, $idx) = ($op->first, $op->first->sibling);
3360
3361 $idx = $self->elem_or_slice_single_index($idx);
3362
3363 unless ($array->name eq $padname) { # Maybe this has been fixed
3364 $array = $array->first; # skip rv2av (or ex-rv2av in _53+)
3365 }
3366 if (my $array_name=$self->elem_or_slice_array_name
3367 ($array, $left, $padname, 1)) {
10e8e32b
FC
3368 return ($array_name =~ /->\z/ ? $array_name : "\$" . $array_name)
3369 . $left . $idx . $right;
21b7468a
BL
3370 } else {
3371 # $x[20][3]{hi} or expr->[20]
3372 my $arrow = is_subscriptable($array) ? "" : "->";
3373 return $self->deparse($array, 24) . $arrow . $left . $idx . $right;
3374 }
3375
6e90668e
SM
3376}
3377
3f872cb9
GS
3378sub pp_aelem { maybe_local(@_, elem(@_, "[", "]", "padav")) }
3379sub pp_helem { maybe_local(@_, elem(@_, "{", "}", "padhv")) }
6e90668e
SM
3380
3381sub pp_gelem {
3382 my $self = shift;
9d2c6865 3383 my($op, $cx) = @_;
6e90668e
SM
3384 my($glob, $part) = ($op->first, $op->last);
3385 $glob = $glob->first; # skip rv2gv
3f872cb9 3386 $glob = $glob->first if $glob->name eq "rv2gv"; # this one's a bug
9d2c6865
SM
3387 my $scope = is_scope($glob);
3388 $glob = $self->deparse($glob, 0);
3389 $part = $self->deparse($part, 1);
6e90668e
SM
3390 return "*" . ($scope ? "{$glob}" : $glob) . "{$part}";
3391}
3392
3393sub slice {
3394 my $self = shift;
9d2c6865 3395 my ($op, $cx, $left, $right, $regname, $padname) = @_;
6e90668e
SM
3396 my $last;
3397 my(@elems, $kid, $array, $list);
3398 if (class($op) eq "LISTOP") {
3399 $last = $op->last;
3400 } else { # ex-hslice inside delete()
3401 for ($kid = $op->first; !null $kid->sibling; $kid = $kid->sibling) {}
3402 $last = $kid;
3403 }
3404 $array = $last;
3405 $array = $array->first