This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
Deparse: detect hh changes properly
[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);
540b6786 23$VERSION = "1.10";
a798dbf2 24use strict;
2ae48fff 25use vars qw/$AUTOLOAD/;
34a48b4b 26use warnings ();
a798dbf2 27
aa381260 28BEGIN {
ff0cf12f 29 # List version-specific constants here.
2be95ceb
NC
30 # Easiest way to keep this code portable between version looks to
31 # be to fake up a dummy constant that will never actually be true.
32 foreach (qw(OPpSORT_INPLACE OPpSORT_DESCEND OPpITER_REVERSED OPpCONST_NOVER
ff0cf12f 33 OPpPAD_STATE PMf_SKIPWHITE RXf_SKIPWHITE
24fcb59f 34 CVf_LOCKED OPpREVERSE_INPLACE OPpSUBSTR_REPL_FIRST
7d789282 35 PMf_NONDESTRUCT OPpCONST_ARYBASE OPpEVAL_BYTES)) {
ff0cf12f 36 eval { import B $_ };
2be95ceb
NC
37 no strict 'refs';
38 *{$_} = sub () {0} unless *{$_}{CODE};
39 }
aa381260
NC
40}
41
6e90668e
SM
42# Changes between 0.50 and 0.51:
43# - fixed nulled leave with live enter in sort { }
44# - fixed reference constants (\"str")
45# - handle empty programs gracefully
c4a6f826 46# - handle infinite loops (for (;;) {}, while (1) {})
e38ccfd9 47# - differentiate between 'for my $x ...' and 'my $x; for $x ...'
6e90668e
SM
48# - various minor cleanups
49# - moved globals into an object
e38ccfd9 50# - added '-u', like B::C
6e90668e
SM
51# - package declarations using cop_stash
52# - subs, formats and code sorted by cop_seq
f6f9bdb7 53# Changes between 0.51 and 0.52:
4d1ff10f 54# - added pp_threadsv (special variables under USE_5005THREADS)
f6f9bdb7 55# - added documentation
bd0865ec 56# Changes between 0.52 and 0.53:
9d2c6865 57# - many changes adding precedence contexts and associativity
e38ccfd9 58# - added '-p' and '-s' output style options
9d2c6865 59# - various other minor fixes
bd0865ec 60# Changes between 0.53 and 0.54:
e38ccfd9 61# - added support for new 'for (1..100)' optimization,
d7f5b6da 62# thanks to Gisle Aas
bd0865ec 63# Changes between 0.54 and 0.55:
90be192f
SM
64# - added support for new qr// construct
65# - added support for new pp_regcreset OP
bd0865ec 66# Changes between 0.55 and 0.56:
f5aa8f4e
SM
67# - tested on base/*.t, cmd/*.t, comp/*.t, io/*.t
68# - fixed $# on non-lexicals broken in last big rewrite
69# - added temporary fix for change in opcode of OP_STRINGIFY
e38ccfd9 70# - fixed problem in 0.54's for() patch in 'for (@ary)'
f5aa8f4e 71# - fixed precedence in conditional of ?:
e38ccfd9 72# - tweaked list paren elimination in 'my($x) = @_'
f5aa8f4e
SM
73# - made continue-block detection trickier wrt. null ops
74# - fixed various prototype problems in pp_entersub
75# - added support for sub prototypes that never get GVs
76# - added unquoting for special filehandle first arg in truncate
e38ccfd9 77# - print doubled rv2gv (a bug) as '*{*GV}' instead of illegal '**GV'
f5aa8f4e 78# - added semicolons at the ends of blocks
e38ccfd9 79# - added -l '#line' declaration option -- fixes cmd/subval.t 27,28
bd0865ec
GS
80# Changes between 0.56 and 0.561:
81# - fixed multiply-declared my var in pp_truncate (thanks to Sarathy)
82# - used new B.pm symbolic constants (done by Nick Ing-Simmons)
83# Changes between 0.561 and 0.57:
84# - stylistic changes to symbolic constant stuff
85# - handled scope in s///e replacement code
86# - added unquote option for expanding "" into concats, etc.
87# - split method and proto parts of pp_entersub into separate functions
88# - various minor cleanups
f4a44678
SM
89# Changes after 0.57:
90# - added parens in \&foo (patch by Albert Dvornik)
91# Changes between 0.57 and 0.58:
e38ccfd9 92# - fixed '0' statements that weren't being printed
f4a44678
SM
93# - added methods for use from other programs
94# (based on patches from James Duncan and Hugo van der Sanden)
95# - added -si and -sT to control indenting (also based on a patch from Hugo)
96# - added -sv to print something else instead of '???'
97# - preliminary version of utf8 tr/// handling
3ed82cfc
GS
98# Changes after 0.58:
99# - uses of $op->ppaddr changed to new $op->name (done by Sarathy)
d989cdac 100# - added support for Hugo's new OP_SETSTATE (like nextstate)
3ed82cfc
GS
101# Changes between 0.58 and 0.59
102# - added support for Chip's OP_METHOD_NAMED
103# - added support for Ilya's OPpTARGET_MY optimization
e38ccfd9 104# - elided arrows before '()' subscripts when possible
58cccf98 105# Changes between 0.59 and 0.60
c4a6f826 106# - support for method attributes was added
58cccf98
SM
107# - some warnings fixed
108# - separate recognition of constant subs
c4a6f826 109# - rewrote continue block handling, now recognizing for loops
58cccf98 110# - added more control of expanding control structures
c7f67cde
RH
111# Changes between 0.60 and 0.61 (mostly by Robin Houston)
112# - many bug-fixes
113# - support for pragmas and 'use'
114# - support for the little-used $[ variable
115# - support for __DATA__ sections
116# - UTF8 support
117# - BEGIN, CHECK, INIT and END blocks
118# - scoping of subroutine declarations fixed
119# - compile-time output from the input program can be suppressed, so that the
120# output is just the deparsed code. (a change to O.pm in fact)
121# - our() declarations
122# - *all* the known bugs are now listed in the BUGS section
123# - comprehensive test mechanism (TEST -deparse)
9a58b761
RGS
124# Changes between 0.62 and 0.63 (mostly by Rafael Garcia-Suarez)
125# - bug-fixes
126# - new switch -P
127# - support for command-line switches (-l, -0, etc.)
d989cdac
SM
128# Changes between 0.63 and 0.64
129# - support for //, CHECK blocks, and assertions
130# - improved handling of foreach loops and lexicals
131# - option to use Data::Dumper for constants
132# - more bug fixes
133# - discovered lots more bugs not yet fixed
0d863452
RH
134#
135# ...
136#
137# Changes between 0.72 and 0.73
138# - support new switch constructs
6e90668e
SM
139
140# Todo:
2a9e2f8a
RH
141# (See also BUGS section at the end of this file)
142#
f4a44678
SM
143# - finish tr/// changes
144# - add option for even more parens (generalize \&foo change)
90be192f 145# - left/right context
58cccf98 146# - copy comments (look at real text with $^P?)
f5aa8f4e 147# - avoid semis in one-statement blocks
9d2c6865 148# - associativity of &&=, ||=, ?:
6e90668e
SM
149# - ',' => '=>' (auto-unquote?)
150# - break long lines ("\r" as discretionary break?)
f4a44678
SM
151# - configurable syntax highlighting: ANSI color, HTML, TeX, etc.
152# - more style options: brace style, hex vs. octal, quotes, ...
153# - print big ints as hex/octal instead of decimal (heuristic?)
e38ccfd9 154# - handle 'my $x if 0'?
6e90668e
SM
155# - version using op_next instead of op_first/sibling?
156# - avoid string copies (pass arrays, one big join?)
9d2c6865 157# - here-docs?
6e90668e 158
d989cdac 159# Current test.deparse failures
d989cdac
SM
160# comp/hints 6 - location of BEGIN blocks wrt. block openings
161# run/switchI 1 - missing -I switches entirely
162# perl -Ifoo -e 'print @INC'
163# op/caller 2 - warning mask propagates backwards before warnings::register
164# 'use warnings; BEGIN {${^WARNING_BITS} eq "U"x12;} use warnings::register'
165# op/getpid 2 - can't assign to shared my() declaration (threads only)
166# 'my $x : shared = 5'
c4a6f826 167# op/override 7 - parens on overridden require change v-string interpretation
d989cdac
SM
168# 'BEGIN{*CORE::GLOBAL::require=sub {}} require v5.6'
169# c.f. 'BEGIN { *f = sub {0} }; f 2'
170# op/pat 774 - losing Unicode-ness of Latin1-only strings
171# 'use charnames ":short"; $x="\N{latin:a with acute}"'
172# op/recurse 12 - missing parens on recursive call makes it look like method
173# 'sub f { f($x) }'
174# op/subst 90 - inconsistent handling of utf8 under "use utf8"
175# op/taint 29 - "use re 'taint'" deparsed in the wrong place wrt. block open
176# op/tiehandle compile - "use strict" deparsed in the wrong place
177# uni/tr_ several
178# ext/B/t/xref 11 - line numbers when we add newlines to one-line subs
179# ext/Data/Dumper/t/dumper compile
180# ext/DB_file/several
181# ext/Encode/several
182# ext/Ernno/Errno warnings
183# ext/IO/lib/IO/t/io_sel 23
184# ext/PerlIO/t/encoding compile
185# ext/POSIX/t/posix 6
186# ext/Socket/Socket 8
187# ext/Storable/t/croak compile
188# lib/Attribute/Handlers/t/multi compile
189# lib/bignum/ several
190# lib/charnames 35
191# lib/constant 32
192# lib/English 40
193# lib/ExtUtils/t/bytes 4
194# lib/File/DosGlob compile
195# lib/Filter/Simple/t/data 1
196# lib/Math/BigInt/t/constant 1
197# lib/Net/t/config Deparse-warning
198# lib/overload compile
199# lib/Switch/ several
200# lib/Symbol 4
201# lib/Test/Simple several
202# lib/Term/Complete
203# lib/Tie/File/t/29_downcopy 5
204# lib/vars 22
f5aa8f4e 205
6e90668e
SM
206# Object fields (were globals):
207#
208# avoid_local:
209# (local($a), local($b)) and local($a, $b) have the same internal
210# representation but the short form looks better. We notice we can
211# use a large-scale local when checking the list, but need to prevent
d989cdac 212# individual locals too. This hash holds the addresses of OPs that
6e90668e
SM
213# have already had their local-ness accounted for. The same thing
214# is done with my().
215#
216# curcv:
217# CV for current sub (or main program) being deparsed
218#
8510e997
RH
219# curcvlex:
220# Cached hash of lexical variables for curcv: keys are names,
221# each value is an array of pairs, indicating the cop_seq of scopes
222# in which a var of that name is valid.
223#
34a48b4b
RH
224# curcop:
225# COP for statement being deparsed
226#
6e90668e
SM
227# curstash:
228# name of the current package for deparsed code
229#
230# subs_todo:
34a48b4b 231# array of [cop_seq, CV, is_format?] for subs and formats we still
6e90668e
SM
232# want to deparse
233#
f5aa8f4e
SM
234# protos_todo:
235# as above, but [name, prototype] for subs that never got a GV
236#
6e90668e
SM
237# subs_done, forms_done:
238# keys are addresses of GVs for subs and formats we've already
239# deparsed (or at least put into subs_todo)
9d2c6865 240#
0ca62a8e
RH
241# subs_declared
242# keys are names of subs for which we've printed declarations.
4a1ac32e
FC
243# That means we can omit parentheses from the arguments. It also means we
244# need to put CORE:: on core functions of the same name.
0ca62a8e 245#
1d38190f
RGS
246# subs_deparsed
247# Keeps track of fully qualified names of all deparsed subs.
248#
9d2c6865 249# parens: -p
f5aa8f4e 250# linenums: -l
bd0865ec 251# unquote: -q
e38ccfd9 252# cuddle: ' ' or '\n', depending on -sC
f4a44678
SM
253# indent_size: -si
254# use_tabs: -sT
255# ex_const: -sv
9d2c6865
SM
256
257# A little explanation of how precedence contexts and associativity
258# work:
259#
260# deparse() calls each per-op subroutine with an argument $cx (short
261# for context, but not the same as the cx* in the perl core), which is
262# a number describing the op's parents in terms of precedence, whether
f5aa8f4e 263# they're inside an expression or at statement level, etc. (see
9d2c6865
SM
264# chart below). When ops with children call deparse on them, they pass
265# along their precedence. Fractional values are used to implement
e38ccfd9 266# associativity ('($x + $y) + $z' => '$x + $y + $y') and related
9d2c6865
SM
267# parentheses hacks. The major disadvantage of this scheme is that
268# it doesn't know about right sides and left sides, so say if you
269# assign a listop to a variable, it can't tell it's allowed to leave
270# the parens off the listop.
271
272# Precedences:
273# 26 [TODO] inside interpolation context ("")
274# 25 left terms and list operators (leftward)
275# 24 left ->
276# 23 nonassoc ++ --
277# 22 right **
278# 21 right ! ~ \ and unary + and -
279# 20 left =~ !~
280# 19 left * / % x
281# 18 left + - .
282# 17 left << >>
283# 16 nonassoc named unary operators
284# 15 nonassoc < > <= >= lt gt le ge
285# 14 nonassoc == != <=> eq ne cmp
286# 13 left &
287# 12 left | ^
288# 11 left &&
289# 10 left ||
290# 9 nonassoc .. ...
291# 8 right ?:
292# 7 right = += -= *= etc.
293# 6 left , =>
294# 5 nonassoc list operators (rightward)
295# 4 right not
296# 3 left and
297# 2 left or xor
298# 1 statement modifiers
d989cdac 299# 0.5 statements, but still print scopes as do { ... }
9d2c6865
SM
300# 0 statement level
301
302# Nonprinting characters with special meaning:
303# \cS - steal parens (see maybe_parens_unop)
304# \n - newline and indent
305# \t - increase indent
e38ccfd9 306# \b - decrease indent ('outdent')
f5aa8f4e 307# \f - flush left (no indent)
9d2c6865 308# \cK - kill following semicolon, if any
6e90668e
SM
309
310sub null {
311 my $op = shift;
312 return class($op) eq "NULL";
313}
314
315sub todo {
316 my $self = shift;
34a48b4b 317 my($cv, $is_form) = @_;
e31885a0 318 return unless ($cv->FILE eq $0 || exists $self->{files}{$cv->FILE});
6e90668e 319 my $seq;
d989cdac
SM
320 if ($cv->OUTSIDE_SEQ) {
321 $seq = $cv->OUTSIDE_SEQ;
322 } elsif (!null($cv->START) and is_state($cv->START)) {
6e90668e
SM
323 $seq = $cv->START->cop_seq;
324 } else {
325 $seq = 0;
326 }
34a48b4b 327 push @{$self->{'subs_todo'}}, [$seq, $cv, $is_form];
1d38190f
RGS
328 unless ($is_form || class($cv->STASH) eq 'SPECIAL') {
329 $self->{'subs_deparsed'}{$cv->STASH->NAME."::".$cv->GV->NAME} = 1;
330 }
6e90668e
SM
331}
332
333sub next_todo {
334 my $self = shift;
335 my $ent = shift @{$self->{'subs_todo'}};
34a48b4b
RH
336 my $cv = $ent->[1];
337 my $gv = $cv->GV;
338 my $name = $self->gv_name($gv);
6e90668e
SM
339 if ($ent->[2]) {
340 return "format $name =\n"
e31885a0 341 . $self->deparse_format($ent->[1]). "\n";
6e90668e 342 } else {
0ca62a8e 343 $self->{'subs_declared'}{$name} = 1;
34a48b4b
RH
344 if ($name eq "BEGIN") {
345 my $use_dec = $self->begin_is_use($cv);
d989cdac 346 if (defined ($use_dec) and $self->{'expand'} < 5) {
0e7fe0f0
RH
347 return () if 0 == length($use_dec);
348 return $use_dec;
349 }
34a48b4b 350 }
a0035eb8
RH
351 my $l = '';
352 if ($self->{'linenums'}) {
353 my $line = $gv->LINE;
354 my $file = $gv->FILE;
355 $l = "\n\f#line $line \"$file\"\n";
356 }
127212b2
DM
357 my $p = '';
358 if (class($cv->STASH) ne "SPECIAL") {
359 my $stash = $cv->STASH->NAME;
360 if ($stash ne $self->{'curstash'}) {
361 $p = "package $stash;\n";
362 $name = "$self->{'curstash'}::$name" unless $name =~ /::/;
363 $self->{'curstash'} = $stash;
364 }
8b2d6640 365 $name =~ s/^\Q$stash\E::(?!\z|.*::)//;
127212b2
DM
366 }
367 return "${p}${l}sub $name " . $self->deparse_sub($cv);
34a48b4b
RH
368 }
369}
370
371# Return a "use" declaration for this BEGIN block, if appropriate
372sub begin_is_use {
373 my ($self, $cv) = @_;
374 my $root = $cv->ROOT;
80dc0729 375 local @$self{qw'curcv curcvlex'} = ($cv);
34a48b4b
RH
376#require B::Debug;
377#B::walkoptree($cv->ROOT, "debug");
378 my $lineseq = $root->first;
379 return if $lineseq->name ne "lineseq";
380
381 my $req_op = $lineseq->first->sibling;
382 return if $req_op->name ne "require";
383
384 my $module;
385 if ($req_op->first->private & OPpCONST_BARE) {
386 # Actually it should always be a bareword
387 $module = $self->const_sv($req_op->first)->PV;
388 $module =~ s[/][::]g;
389 $module =~ s/.pm$//;
390 }
391 else {
d989cdac 392 $module = $self->const($self->const_sv($req_op->first), 6);
34a48b4b
RH
393 }
394
395 my $version;
396 my $version_op = $req_op->sibling;
397 return if class($version_op) eq "NULL";
398 if ($version_op->name eq "lineseq") {
399 # We have a version parameter; skip nextstate & pushmark
400 my $constop = $version_op->first->next->next;
401
402 return unless $self->const_sv($constop)->PV eq $module;
403 $constop = $constop->sibling;
a58644de 404 $version = $self->const_sv($constop);
d989cdac
SM
405 if (class($version) eq "IV") {
406 $version = $version->int_value;
407 } elsif (class($version) eq "NV") {
408 $version = $version->NV;
409 } elsif (class($version) ne "PVMG") {
410 # Includes PVIV and PVNV
a58644de
RGS
411 $version = $version->PV;
412 } else {
413 # version specified as a v-string
414 $version = 'v'.join '.', map ord, split //, $version->PV;
415 }
34a48b4b
RH
416 $constop = $constop->sibling;
417 return if $constop->name ne "method_named";
418 return if $self->const_sv($constop)->PV ne "VERSION";
419 }
420
421 $lineseq = $version_op->sibling;
422 return if $lineseq->name ne "lineseq";
423 my $entersub = $lineseq->first->sibling;
424 if ($entersub->name eq "stub") {
425 return "use $module $version ();\n" if defined $version;
426 return "use $module ();\n";
427 }
428 return if $entersub->name ne "entersub";
429
430 # See if there are import arguments
431 my $args = '';
432
6ec152c3
RH
433 my $svop = $entersub->first->sibling; # Skip over pushmark
434 return unless $self->const_sv($svop)->PV eq $module;
34a48b4b
RH
435
436 # Pull out the arguments
6ec152c3
RH
437 for ($svop=$svop->sibling; $svop->name ne "method_named";
438 $svop = $svop->sibling) {
34a48b4b 439 $args .= ", " if length($args);
6ec152c3 440 $args .= $self->deparse($svop, 6);
34a48b4b
RH
441 }
442
443 my $use = 'use';
6ec152c3 444 my $method_named = $svop;
34a48b4b
RH
445 return if $method_named->name ne "method_named";
446 my $method_name = $self->const_sv($method_named)->PV;
447
448 if ($method_name eq "unimport") {
449 $use = 'no';
450 }
451
452 # Certain pragmas are dealt with using hint bits,
453 # so we ignore them here
454 if ($module eq 'strict' || $module eq 'integer'
0ced6c29
RGS
455 || $module eq 'bytes' || $module eq 'warnings'
456 || $module eq 'feature') {
34a48b4b
RH
457 return "";
458 }
459
460 if (defined $version && length $args) {
461 return "$use $module $version ($args);\n";
462 } elsif (defined $version) {
463 return "$use $module $version;\n";
464 } elsif (length $args) {
465 return "$use $module ($args);\n";
466 } else {
467 return "$use $module;\n";
6e90668e
SM
468 }
469}
470
6e90668e 471sub stash_subs {
34a48b4b
RH
472 my ($self, $pack) = @_;
473 my (@ret, $stash);
474 if (!defined $pack) {
475 $pack = '';
476 $stash = \%::;
f5aa8f4e 477 }
34a48b4b
RH
478 else {
479 $pack =~ s/(::)?$/::/;
480 no strict 'refs';
d1dc589d 481 $stash = \%{"main::$pack"};
34a48b4b
RH
482 }
483 my %stash = svref_2object($stash)->ARRAY;
484 while (my ($key, $val) = each %stash) {
f5aa8f4e
SM
485 my $class = class($val);
486 if ($class eq "PV") {
a0035eb8
RH
487 # Just a prototype. As an ugly but fairly effective way
488 # to find out if it belongs here is to see if the AUTOLOAD
489 # (if any) for the stash was defined in one of our files.
490 my $A = $stash{"AUTOLOAD"};
491 if (defined ($A) && class($A) eq "GV" && defined($A->CV)
492 && class($A->CV) eq "CV") {
493 my $AF = $A->FILE;
494 next unless $AF eq $0 || exists $self->{'files'}{$AF};
495 }
f5aa8f4e 496 push @{$self->{'protos_todo'}}, [$pack . $key, $val->PV];
5b4ee549 497 } elsif ($class eq "IV" && !($val->FLAGS & SVf_ROK)) {
a0035eb8 498 # Just a name. As above.
5b4ee549
NC
499 # But skip proxy constant subroutines, as some form of perl-space
500 # visible code must have created them, be it a use statement, or
501 # some direct symbol-table manipulation code that we will Deparse
a0035eb8
RH
502 my $A = $stash{"AUTOLOAD"};
503 if (defined ($A) && class($A) eq "GV" && defined($A->CV)
504 && class($A->CV) eq "CV") {
505 my $AF = $A->FILE;
506 next unless $AF eq $0 || exists $self->{'files'}{$AF};
507 }
d989cdac 508 push @{$self->{'protos_todo'}}, [$pack . $key, undef];
f5aa8f4e 509 } elsif ($class eq "GV") {
34a48b4b 510 if (class(my $cv = $val->CV) ne "SPECIAL") {
f5aa8f4e 511 next if $self->{'subs_done'}{$$val}++;
e31885a0 512 next if $$val != ${$cv->GV}; # Ignore imposters
8510e997 513 $self->todo($cv, 0);
f5aa8f4e 514 }
e31885a0 515 if (class(my $cv = $val->FORM) ne "SPECIAL") {
f5aa8f4e 516 next if $self->{'forms_done'}{$$val}++;
e31885a0
RH
517 next if $$val != ${$cv->GV}; # Ignore imposters
518 $self->todo($cv, 1);
f5aa8f4e 519 }
34a48b4b 520 if (class($val->HV) ne "SPECIAL" && $key =~ /::$/) {
8b2d6640
FC
521 $self->stash_subs($pack . $key)
522 unless $pack eq '' && $key eq 'main::';
523 # avoid infinite recursion
34a48b4b 524 }
6e90668e
SM
525 }
526 }
527}
a798dbf2 528
f5aa8f4e
SM
529sub print_protos {
530 my $self = shift;
531 my $ar;
532 my @ret;
533 foreach $ar (@{$self->{'protos_todo'}}) {
534 my $proto = (defined $ar->[1] ? " (". $ar->[1] . ")" : "");
535 push @ret, "sub " . $ar->[0] . "$proto;\n";
536 }
537 delete $self->{'protos_todo'};
538 return @ret;
539}
540
9d2c6865
SM
541sub style_opts {
542 my $self = shift;
543 my $opts = shift;
544 my $opt;
545 while (length($opt = substr($opts, 0, 1))) {
546 if ($opt eq "C") {
547 $self->{'cuddle'} = " ";
f4a44678
SM
548 $opts = substr($opts, 1);
549 } elsif ($opt eq "i") {
550 $opts =~ s/^i(\d+)//;
551 $self->{'indent_size'} = $1;
552 } elsif ($opt eq "T") {
553 $self->{'use_tabs'} = 1;
554 $opts = substr($opts, 1);
555 } elsif ($opt eq "v") {
556 $opts =~ s/^v([^.]*)(.|$)//;
557 $self->{'ex_const'} = $1;
9d2c6865 558 }
9d2c6865
SM
559 }
560}
561
f4a44678
SM
562sub new {
563 my $class = shift;
564 my $self = bless {}, $class;
f4a44678 565 $self->{'cuddle'} = "\n";
d989cdac
SM
566 $self->{'curcop'} = undef;
567 $self->{'curstash'} = "main";
568 $self->{'ex_const'} = "'???'";
793e2a70 569 $self->{'expand'} = 0;
d989cdac
SM
570 $self->{'files'} = {};
571 $self->{'indent_size'} = 4;
793e2a70
RH
572 $self->{'linenums'} = 0;
573 $self->{'parens'} = 0;
d989cdac
SM
574 $self->{'subs_todo'} = [];
575 $self->{'unquote'} = 0;
576 $self->{'use_dumper'} = 0;
577 $self->{'use_tabs'} = 0;
08c6f5ec 578
bc6b2ef6 579 $self->{'ambient_arybase'} = 0;
e31885a0 580 $self->{'ambient_warnings'} = undef; # Assume no lexical warnings
a0405c92 581 $self->{'ambient_hints'} = 0;
0ced6c29 582 $self->{'ambient_hinthash'} = undef;
08c6f5ec
RH
583 $self->init();
584
f4a44678 585 while (my $arg = shift @_) {
d989cdac
SM
586 if ($arg eq "-d") {
587 $self->{'use_dumper'} = 1;
588 require Data::Dumper;
589 } elsif ($arg =~ /^-f(.*)/) {
34a48b4b 590 $self->{'files'}{$1} = 1;
d989cdac
SM
591 } elsif ($arg eq "-l") {
592 $self->{'linenums'} = 1;
f4a44678
SM
593 } elsif ($arg eq "-p") {
594 $self->{'parens'} = 1;
acaaef34
RGS
595 } elsif ($arg eq "-P") {
596 $self->{'noproto'} = 1;
f4a44678
SM
597 } elsif ($arg eq "-q") {
598 $self->{'unquote'} = 1;
599 } elsif (substr($arg, 0, 2) eq "-s") {
600 $self->style_opts(substr $arg, 2);
58cccf98
SM
601 } elsif ($arg =~ /^-x(\d)$/) {
602 $self->{'expand'} = $1;
f4a44678
SM
603 }
604 }
605 return $self;
606}
607
810aef70
RH
608{
609 # Mask out the bits that L<warnings::register> uses
610 my $WARN_MASK;
611 BEGIN {
612 $WARN_MASK = $warnings::Bits{all} | $warnings::DeadBits{all};
613 }
614 sub WARN_MASK () {
615 return $WARN_MASK;
616 }
34a48b4b
RH
617}
618
08c6f5ec
RH
619# Initialise the contextual information, either from
620# defaults provided with the ambient_pragmas method,
621# or from perl's own defaults otherwise.
622sub init {
623 my $self = shift;
624
bc6b2ef6 625 $self->{'arybase'} = $self->{'ambient_arybase'};
e31885a0
RH
626 $self->{'warnings'} = defined ($self->{'ambient_warnings'})
627 ? $self->{'ambient_warnings'} & WARN_MASK
628 : undef;
d5ec2987 629 $self->{'hints'} = $self->{'ambient_hints'};
e412117e 630 $self->{'hints'} &= 0xFF if $] < 5.009;
0ced6c29 631 $self->{'hinthash'} = $self->{'ambient_hinthash'};
217aba5d
RH
632
633 # also a convenient place to clear out subs_declared
634 delete $self->{'subs_declared'};
08c6f5ec
RH
635}
636
a798dbf2 637sub compile {
6e90668e 638 my(@args) = @_;
d989cdac 639 return sub {
f4a44678 640 my $self = B::Deparse->new(@args);
d2bc402e
RGS
641 # First deparse command-line args
642 if (defined $^I) { # deparse -i
51a5edaf 643 print q(BEGIN { $^I = ).perlstring($^I).qq(; }\n);
d2bc402e
RGS
644 }
645 if ($^W) { # deparse -w
646 print qq(BEGIN { \$^W = $^W; }\n);
647 }
648 if ($/ ne "\n" or defined $O::savebackslash) { # deparse -l and -0
51a5edaf
RGS
649 my $fs = perlstring($/) || 'undef';
650 my $bs = perlstring($O::savebackslash) || 'undef';
d2bc402e
RGS
651 print qq(BEGIN { \$/ = $fs; \$\\ = $bs; }\n);
652 }
34a48b4b 653 my @BEGINs = B::begin_av->isa("B::AV") ? B::begin_av->ARRAY : ();
676456c2
AG
654 my @UNITCHECKs = B::unitcheck_av->isa("B::AV")
655 ? B::unitcheck_av->ARRAY
656 : ();
ece599bd 657 my @CHECKs = B::check_av->isa("B::AV") ? B::check_av->ARRAY : ();
34a48b4b
RH
658 my @INITs = B::init_av->isa("B::AV") ? B::init_av->ARRAY : ();
659 my @ENDs = B::end_av->isa("B::AV") ? B::end_av->ARRAY : ();
676456c2 660 for my $block (@BEGINs, @UNITCHECKs, @CHECKs, @INITs, @ENDs) {
e31885a0 661 $self->todo($block, 0);
34a48b4b
RH
662 }
663 $self->stash_subs();
d989cdac
SM
664 local($SIG{"__DIE__"}) =
665 sub {
666 if ($self->{'curcop'}) {
667 my $cop = $self->{'curcop'};
668 my($line, $file) = ($cop->line, $cop->file);
669 print STDERR "While deparsing $file near line $line,\n";
670 }
671 };
6e90668e 672 $self->{'curcv'} = main_cv;
8510e997 673 $self->{'curcvlex'} = undef;
f5aa8f4e 674 print $self->print_protos;
6e90668e 675 @{$self->{'subs_todo'}} =
f4a44678 676 sort {$a->[0] <=> $b->[0]} @{$self->{'subs_todo'}};
d989cdac 677 print $self->indent($self->deparse_root(main_root)), "\n"
f4a44678 678 unless null main_root;
6e90668e
SM
679 my @text;
680 while (scalar(@{$self->{'subs_todo'}})) {
681 push @text, $self->next_todo;
682 }
6f611a1a 683 print $self->indent(join("", @text)), "\n" if @text;
e31885a0
RH
684
685 # Print __DATA__ section, if necessary
686 no strict 'refs';
96c57f7e
RGS
687 my $laststash = defined $self->{'curcop'}
688 ? $self->{'curcop'}->stash->NAME : $self->{'curstash'};
689 if (defined *{$laststash."::DATA"}{IO}) {
127212b2
DM
690 print "package $laststash;\n"
691 unless $laststash eq $self->{'curstash'};
e31885a0 692 print "__DATA__\n";
96c57f7e 693 print readline(*{$laststash."::DATA"});
e31885a0 694 }
a798dbf2 695 }
a798dbf2
MB
696}
697
f4a44678
SM
698sub coderef2text {
699 my $self = shift;
700 my $sub = shift;
0853f172 701 croak "Usage: ->coderef2text(CODEREF)" unless UNIVERSAL::isa($sub, "CODE");
08c6f5ec
RH
702
703 $self->init();
f4a44678
SM
704 return $self->indent($self->deparse_sub(svref_2object($sub)));
705}
706
08c6f5ec
RH
707sub ambient_pragmas {
708 my $self = shift;
bc6b2ef6 709 my ($arybase, $hint_bits, $warning_bits, $hinthash) = (0, 0);
08c6f5ec
RH
710
711 while (@_ > 1) {
712 my $name = shift();
713 my $val = shift();
714
715 if ($name eq 'strict') {
716 require strict;
717
718 if ($val eq 'none') {
719 $hint_bits &= ~strict::bits(qw/refs subs vars/);
720 next();
721 }
722
723 my @names;
724 if ($val eq "all") {
725 @names = qw/refs subs vars/;
726 }
727 elsif (ref $val) {
728 @names = @$val;
729 }
730 else {
a0405c92 731 @names = split' ', $val;
08c6f5ec
RH
732 }
733 $hint_bits |= strict::bits(@names);
734 }
735
bc6b2ef6
Z
736 elsif ($name eq '$[') {
737 if (OPpCONST_ARYBASE) {
738 $arybase = $val;
739 } else {
740 croak "\$[ can't be non-zero on this perl" unless $val == 0;
741 }
742 }
743
a0405c92
RH
744 elsif ($name eq 'integer'
745 || $name eq 'bytes'
746 || $name eq 'utf8') {
747 require "$name.pm";
08c6f5ec 748 if ($val) {
a0405c92
RH
749 $hint_bits |= ${$::{"${name}::"}{"hint_bits"}};
750 }
751 else {
752 $hint_bits &= ~${$::{"${name}::"}{"hint_bits"}};
753 }
754 }
755
756 elsif ($name eq 're') {
757 require re;
758 if ($val eq 'none') {
2570cdf1 759 $hint_bits &= ~re::bits(qw/taint eval/);
a0405c92
RH
760 next();
761 }
762
763 my @names;
764 if ($val eq 'all') {
2570cdf1 765 @names = qw/taint eval/;
a0405c92
RH
766 }
767 elsif (ref $val) {
768 @names = @$val;
08c6f5ec
RH
769 }
770 else {
a0405c92 771 @names = split' ',$val;
08c6f5ec 772 }
a0405c92 773 $hint_bits |= re::bits(@names);
08c6f5ec
RH
774 }
775
776 elsif ($name eq 'warnings') {
08c6f5ec 777 if ($val eq 'none') {
810aef70 778 $warning_bits = $warnings::NONE;
08c6f5ec
RH
779 next();
780 }
781
782 my @names;
783 if (ref $val) {
784 @names = @$val;
785 }
786 else {
787 @names = split/\s+/, $val;
788 }
789
810aef70 790 $warning_bits = $warnings::NONE if !defined ($warning_bits);
08c6f5ec
RH
791 $warning_bits |= warnings::bits(@names);
792 }
793
794 elsif ($name eq 'warning_bits') {
795 $warning_bits = $val;
796 }
797
798 elsif ($name eq 'hint_bits') {
799 $hint_bits = $val;
800 }
801
0ced6c29
RGS
802 elsif ($name eq '%^H') {
803 $hinthash = $val;
804 }
805
08c6f5ec
RH
806 else {
807 croak "Unknown pragma type: $name";
808 }
809 }
810 if (@_) {
811 croak "The ambient_pragmas method expects an even number of args";
812 }
813
bc6b2ef6 814 $self->{'ambient_arybase'} = $arybase;
08c6f5ec 815 $self->{'ambient_warnings'} = $warning_bits;
a0405c92 816 $self->{'ambient_hints'} = $hint_bits;
0ced6c29 817 $self->{'ambient_hinthash'} = $hinthash;
08c6f5ec
RH
818}
819
d989cdac 820# This method is the inner loop, so try to keep it simple
6e90668e
SM
821sub deparse {
822 my $self = shift;
d989cdac 823 my($op, $cx) = @_;
34a48b4b
RH
824
825 Carp::confess("Null op in deparse") if !defined($op)
826 || class($op) eq "NULL";
3f872cb9 827 my $meth = "pp_" . $op->name;
9d2c6865 828 return $self->$meth($op, $cx);
a798dbf2
MB
829}
830
6e90668e 831sub indent {
f4a44678 832 my $self = shift;
6e90668e
SM
833 my $txt = shift;
834 my @lines = split(/\n/, $txt);
835 my $leader = "";
f4a44678 836 my $level = 0;
6e90668e
SM
837 my $line;
838 for $line (@lines) {
f4a44678
SM
839 my $cmd = substr($line, 0, 1);
840 if ($cmd eq "\t" or $cmd eq "\b") {
841 $level += ($cmd eq "\t" ? 1 : -1) * $self->{'indent_size'};
842 if ($self->{'use_tabs'}) {
843 $leader = "\t" x ($level / 8) . " " x ($level % 8);
844 } else {
845 $leader = " " x $level;
846 }
6e90668e
SM
847 $line = substr($line, 1);
848 }
f5aa8f4e
SM
849 if (substr($line, 0, 1) eq "\f") {
850 $line = substr($line, 1); # no indent
851 } else {
852 $line = $leader . $line;
853 }
9d2c6865 854 $line =~ s/\cK;?//g;
6e90668e
SM
855 }
856 return join("\n", @lines);
857}
858
6e90668e
SM
859sub deparse_sub {
860 my $self = shift;
861 my $cv = shift;
862 my $proto = "";
ce4e655d 863Carp::confess("NULL in deparse_sub") if !defined($cv) || $cv->isa("B::NULL");
34a48b4b
RH
864Carp::confess("SPECIAL in deparse_sub") if $cv->isa("B::SPECIAL");
865 local $self->{'curcop'} = $self->{'curcop'};
6e90668e
SM
866 if ($cv->FLAGS & SVf_POK) {
867 $proto = "(". $cv->PV . ") ";
868 }
aa381260 869 if ($cv->CvFLAGS & (CVf_METHOD|CVf_LOCKED|CVf_LVALUE)) {
6aaf4108
SC
870 $proto .= ": ";
871 $proto .= "lvalue " if $cv->CvFLAGS & CVf_LVALUE;
aa381260 872 $proto .= "locked " if $cv->CvFLAGS & CVf_LOCKED;
6aaf4108
SC
873 $proto .= "method " if $cv->CvFLAGS & CVf_METHOD;
874 }
875
6e90668e 876 local($self->{'curcv'}) = $cv;
8510e997 877 local($self->{'curcvlex'});
0ced6c29
RGS
878 local(@$self{qw'curstash warnings hints hinthash'})
879 = @$self{qw'curstash warnings hints hinthash'};
ce4e655d 880 my $body;
6e90668e 881 if (not null $cv->ROOT) {
ce4e655d
RH
882 my $lineseq = $cv->ROOT->first;
883 if ($lineseq->name eq "lineseq") {
884 my @ops;
885 for(my$o=$lineseq->first; $$o; $o=$o->sibling) {
886 push @ops, $o;
887 }
888 $body = $self->lineseq(undef, @ops).";";
889 my $scope_en = $self->find_scope_en($lineseq);
890 if (defined $scope_en) {
891 my $subs = join"", $self->seq_subs($scope_en);
892 $body .= ";\n$subs" if length($subs);
893 }
894 }
895 else {
896 $body = $self->deparse($cv->ROOT->first, 0);
897 }
de3f1649 898 }
ce4e655d
RH
899 else {
900 my $sv = $cv->const_sv;
901 if ($$sv) {
902 # uh-oh. inlinable sub... format it differently
d989cdac 903 return $proto . "{ " . $self->const($sv, 0) . " }\n";
ce4e655d
RH
904 } else { # XSUB? (or just a declaration)
905 return "$proto;\n";
906 }
6e90668e 907 }
ce4e655d 908 return $proto ."{\n\t$body\n\b}" ."\n";
6e90668e
SM
909}
910
911sub deparse_format {
912 my $self = shift;
913 my $form = shift;
914 my @text;
915 local($self->{'curcv'}) = $form;
8510e997 916 local($self->{'curcvlex'});
67fc2416 917 local($self->{'in_format'}) = 1;
0ced6c29
RGS
918 local(@$self{qw'curstash warnings hints hinthash'})
919 = @$self{qw'curstash warnings hints hinthash'};
6e90668e
SM
920 my $op = $form->ROOT;
921 my $kid;
fb725297
RGS
922 return "\f." if $op->first->name eq 'stub'
923 || $op->first->name eq 'nextstate';
6e90668e
SM
924 $op = $op->first->first; # skip leavewrite, lineseq
925 while (not null $op) {
926 $op = $op->sibling; # skip nextstate
927 my @exprs;
928 $kid = $op->first->sibling; # skip pushmark
a5b0cd91 929 push @text, "\f".$self->const_sv($kid)->PV;
6e90668e
SM
930 $kid = $kid->sibling;
931 for (; not null $kid; $kid = $kid->sibling) {
9d2c6865 932 push @exprs, $self->deparse($kid, 0);
6e90668e 933 }
a5b0cd91 934 push @text, "\f".join(", ", @exprs)."\n" if @exprs;
6e90668e
SM
935 $op = $op->sibling;
936 }
a5b0cd91 937 return join("", @text) . "\f.";
6e90668e
SM
938}
939
6e90668e 940sub is_scope {
a798dbf2 941 my $op = shift;
3f872cb9
GS
942 return $op->name eq "leave" || $op->name eq "scope"
943 || $op->name eq "lineseq"
d989cdac 944 || ($op->name eq "null" && class($op) eq "UNOP"
3f872cb9 945 && (is_scope($op->first) || $op->first->name eq "enter"));
6e90668e
SM
946}
947
948sub is_state {
3f872cb9
GS
949 my $name = $_[0]->name;
950 return $name eq "nextstate" || $name eq "dbstate" || $name eq "setstate";
6e90668e
SM
951}
952
e38ccfd9 953sub is_miniwhile { # check for one-line loop ('foo() while $y--')
6e90668e 954 my $op = shift;
d989cdac 955 return (!null($op) and null($op->sibling)
3f872cb9
GS
956 and $op->name eq "null" and class($op) eq "UNOP"
957 and (($op->first->name =~ /^(and|or)$/
958 and $op->first->first->sibling->name eq "lineseq")
959 or ($op->first->name eq "lineseq"
6e90668e 960 and not null $op->first->first->sibling
3f872cb9 961 and $op->first->first->sibling->name eq "unstack")
6e90668e
SM
962 ));
963}
964
d989cdac
SM
965# Check if the op and its sibling are the initialization and the rest of a
966# for (..;..;..) { ... } loop
967sub is_for_loop {
968 my $op = shift;
969 # This OP might be almost anything, though it won't be a
970 # nextstate. (It's the initialization, so in the canonical case it
eae48c89
Z
971 # will be an sassign.) The sibling is (old style) a lineseq whose
972 # first child is a nextstate and whose second is a leaveloop, or
973 # (new style) an unstack whose sibling is a leaveloop.
d989cdac 974 my $lseq = $op->sibling;
eae48c89
Z
975 return 0 unless !is_state($op) and !null($lseq);
976 if ($lseq->name eq "lineseq") {
d989cdac
SM
977 if ($lseq->first && !null($lseq->first) && is_state($lseq->first)
978 && (my $sib = $lseq->first->sibling)) {
979 return (!null($sib) && $sib->name eq "leaveloop");
980 }
eae48c89
Z
981 } elsif ($lseq->name eq "unstack" && ($lseq->flags & OPf_SPECIAL)) {
982 my $sib = $lseq->sibling;
983 return $sib && !null($sib) && $sib->name eq "leaveloop";
d989cdac
SM
984 }
985 return 0;
986}
987
6e90668e
SM
988sub is_scalar {
989 my $op = shift;
3f872cb9
GS
990 return ($op->name eq "rv2sv" or
991 $op->name eq "padsv" or
992 $op->name eq "gv" or # only in array/hash constructs
bd0865ec 993 $op->flags & OPf_KIDS && !null($op->first)
3f872cb9 994 && $op->first->name eq "gvsv");
6e90668e
SM
995}
996
9d2c6865
SM
997sub maybe_parens {
998 my $self = shift;
999 my($text, $cx, $prec) = @_;
1000 if ($prec < $cx # unary ops nest just fine
1001 or $prec == $cx and $cx != 4 and $cx != 16 and $cx != 21
1002 or $self->{'parens'})
1003 {
1004 $text = "($text)";
1005 # In a unop, let parent reuse our parens; see maybe_parens_unop
1006 $text = "\cS" . $text if $cx == 16;
1007 return $text;
1008 } else {
1009 return $text;
1010 }
1011}
1012
e38ccfd9 1013# same as above, but get around the 'if it looks like a function' rule
9d2c6865
SM
1014sub maybe_parens_unop {
1015 my $self = shift;
1016 my($name, $kid, $cx) = @_;
1017 if ($cx > 16 or $self->{'parens'}) {
a0035eb8
RH
1018 $kid = $self->deparse($kid, 1);
1019 if ($name eq "umask" && $kid =~ /^\d+$/) {
1020 $kid = sprintf("%#o", $kid);
1021 }
4a1ac32e 1022 return $self->keyword($name) . "($kid)";
9d2c6865
SM
1023 } else {
1024 $kid = $self->deparse($kid, 16);
a0035eb8
RH
1025 if ($name eq "umask" && $kid =~ /^\d+$/) {
1026 $kid = sprintf("%#o", $kid);
1027 }
4a1ac32e 1028 $name = $self->keyword($name);
9d2c6865
SM
1029 if (substr($kid, 0, 1) eq "\cS") {
1030 # use kid's parens
1031 return $name . substr($kid, 1);
1032 } elsif (substr($kid, 0, 1) eq "(") {
1033 # avoid looks-like-a-function trap with extra parens
e38ccfd9 1034 # ('+' can lead to ambiguities)
9d2c6865
SM
1035 return "$name(" . $kid . ")";
1036 } else {
1037 return "$name $kid";
1038 }
1039 }
1040}
1041
1042sub maybe_parens_func {
1043 my $self = shift;
1044 my($func, $text, $cx, $prec) = @_;
1045 if ($prec <= $cx or substr($text, 0, 1) eq "(" or $self->{'parens'}) {
1046 return "$func($text)";
1047 } else {
1048 return "$func $text";
1049 }
1050}
1051
6e90668e
SM
1052sub maybe_local {
1053 my $self = shift;
9d2c6865 1054 my($op, $cx, $text) = @_;
ce4e655d
RH
1055 my $our_intro = ($op->name =~ /^(gv|rv2)[ash]v$/) ? OPpOUR_INTRO : 0;
1056 if ($op->private & (OPpLVAL_INTRO|$our_intro)
1057 and not $self->{'avoid_local'}{$$op}) {
1058 my $our_local = ($op->private & OPpLVAL_INTRO) ? "local" : "our";
8e3542b6 1059 if( $our_local eq 'our' ) {
640d5d41
FC
1060 if ( $text !~ /^\W(\w+::)*\w+\z/
1061 and !utf8::decode($text) || $text !~ /^\W(\w+::)*\w+\z/
1062 ) {
1063 die "Unexpected our($text)\n";
1064 }
d989cdac 1065 $text =~ s/(\w+::)+//;
8e3542b6 1066 }
e8d3f51b 1067 if (want_scalar($op)) {
ce4e655d 1068 return "$our_local $text";
e8d3f51b 1069 } else {
ce4e655d 1070 return $self->maybe_parens_func("$our_local", $text, $cx, 16);
e8d3f51b 1071 }
6e90668e
SM
1072 } else {
1073 return $text;
a798dbf2 1074 }
a798dbf2
MB
1075}
1076
3ed82cfc
GS
1077sub maybe_targmy {
1078 my $self = shift;
1079 my($op, $cx, $func, @args) = @_;
1080 if ($op->private & OPpTARGET_MY) {
1081 my $var = $self->padname($op->targ);
1082 my $val = $func->($self, $op, 7, @args);
1083 return $self->maybe_parens("$var = $val", $cx, 7);
1084 } else {
1085 return $func->($self, $op, $cx, @args);
1086 }
1087}
1088
6e90668e
SM
1089sub padname_sv {
1090 my $self = shift;
1091 my $targ = shift;
d989cdac 1092 return $self->{'curcv'}->PADLIST->ARRAYelt(0)->ARRAYelt($targ);
6e90668e
SM
1093}
1094
1095sub maybe_my {
1096 my $self = shift;
9d2c6865 1097 my($op, $cx, $text) = @_;
4c1f658f 1098 if ($op->private & OPpLVAL_INTRO and not $self->{'avoid_local'}{$$op}) {
80e3f4ad
FC
1099 my $my = $op->private & OPpPAD_STATE
1100 ? $self->keyword("state")
1101 : "my";
e8d3f51b 1102 if (want_scalar($op)) {
3462b4ac 1103 return "$my $text";
e8d3f51b 1104 } else {
3462b4ac 1105 return $self->maybe_parens_func($my, $text, $cx, 16);
e8d3f51b 1106 }
6e90668e
SM
1107 } else {
1108 return $text;
1109 }
1110}
1111
9d2c6865
SM
1112# The following OPs don't have functions:
1113
1114# pp_padany -- does not exist after parsing
9d2c6865 1115
2ae48fff
RGS
1116sub AUTOLOAD {
1117 if ($AUTOLOAD =~ s/^.*::pp_//) {
1118 warn "unexpected OP_".uc $AUTOLOAD;
1119 return "XXX";
1120 } else {
1121 die "Undefined subroutine $AUTOLOAD called";
1122 }
9d2c6865 1123}
6e90668e 1124
611c1e95
IZ
1125sub DESTROY {} # Do not AUTOLOAD
1126
ce4e655d
RH
1127# $root should be the op which represents the root of whatever
1128# we're sequencing here. If it's undefined, then we don't append
1129# any subroutine declarations to the deparsed ops, otherwise we
1130# append appropriate declarations.
58cccf98 1131sub lineseq {
ce4e655d 1132 my($self, $root, @ops) = @_;
58cccf98 1133 my($expr, @exprs);
ce4e655d
RH
1134
1135 my $out_cop = $self->{'curcop'};
1136 my $out_seq = defined($out_cop) ? $out_cop->cop_seq : undef;
1137 my $limit_seq;
1138 if (defined $root) {
1139 $limit_seq = $out_seq;
76df5e8f
DM
1140 my $nseq;
1141 $nseq = $self->find_scope_st($root->sibling) if ${$root->sibling};
ce4e655d
RH
1142 $limit_seq = $nseq if !defined($limit_seq)
1143 or defined($nseq) && $nseq < $limit_seq;
1144 }
1145 $limit_seq = $self->{'limit_seq'}
1146 if defined($self->{'limit_seq'})
1147 && (!defined($limit_seq) || $self->{'limit_seq'} < $limit_seq);
1148 local $self->{'limit_seq'} = $limit_seq;
09d856fb
CK
1149
1150 $self->walk_lineseq($root, \@ops,
1151 sub { push @exprs, $_[0]} );
1152
ce4e655d
RH
1153 my $body = join(";\n", grep {length} @exprs);
1154 my $subs = "";
67fc2416 1155 if (defined $root && defined $limit_seq && !$self->{'in_format'}) {
ce4e655d
RH
1156 $subs = join "\n", $self->seq_subs($limit_seq);
1157 }
1158 return join(";\n", grep {length} $body, $subs);
6e90668e
SM
1159}
1160
58cccf98 1161sub scopeop {
d989cdac 1162 my($real_block, $self, $op, $cx) = @_;
58cccf98
SM
1163 my $kid;
1164 my @kids;
a0405c92 1165
0ced6c29
RGS
1166 local(@$self{qw'curstash warnings hints hinthash'})
1167 = @$self{qw'curstash warnings hints hinthash'} if $real_block;
58cccf98
SM
1168 if ($real_block) {
1169 $kid = $op->first->sibling; # skip enter
1170 if (is_miniwhile($kid)) {
1171 my $top = $kid->first;
1172 my $name = $top->name;
1173 if ($name eq "and") {
1174 $name = "while";
1175 } elsif ($name eq "or") {
1176 $name = "until";
1177 } else { # no conditional -> while 1 or until 0
1178 return $self->deparse($top->first, 1) . " while 1";
1179 }
1180 my $cond = $top->first;
1181 my $body = $cond->sibling->first; # skip lineseq
1182 $cond = $self->deparse($cond, 1);
1183 $body = $self->deparse($body, 1);
1184 return "$body $name $cond";
6e90668e 1185 }
58cccf98
SM
1186 } else {
1187 $kid = $op->first;
1188 }
1189 for (; !null($kid); $kid = $kid->sibling) {
1190 push @kids, $kid;
6e90668e 1191 }
d989cdac 1192 if ($cx > 0) { # inside an expression, (a do {} while for lineseq)
ce4e655d 1193 return "do {\n\t" . $self->lineseq($op, @kids) . "\n\b}";
9d2c6865 1194 } else {
ce4e655d 1195 my $lineseq = $self->lineseq($op, @kids);
7a9b44b9 1196 return (length ($lineseq) ? "$lineseq;" : "");
6e90668e 1197 }
6e90668e
SM
1198}
1199
ce4e655d 1200sub pp_scope { scopeop(0, @_); }
58cccf98
SM
1201sub pp_lineseq { scopeop(0, @_); }
1202sub pp_leave { scopeop(1, @_); }
9d2c6865 1203
d989cdac
SM
1204# This is a special case of scopeop and lineseq, for the case of the
1205# main_root. The difference is that we print the output statements as
1206# soon as we get them, for the sake of impatient users.
1207sub deparse_root {
1208 my $self = shift;
1209 my($op) = @_;
0ced6c29
RGS
1210 local(@$self{qw'curstash warnings hints hinthash'})
1211 = @$self{qw'curstash warnings hints hinthash'};
d989cdac 1212 my @kids;
4ca8de37 1213 return if null $op->first; # Can happen, e.g., for Bytecode without -k
d989cdac
SM
1214 for (my $kid = $op->first->sibling; !null($kid); $kid = $kid->sibling) {
1215 push @kids, $kid;
1216 }
09d856fb
CK
1217 $self->walk_lineseq($op, \@kids,
1218 sub { print $self->indent($_[0].';');
1219 print "\n" unless $_[1] == $#kids;
1220 });
1221}
1222
1223sub walk_lineseq {
1224 my ($self, $op, $kids, $callback) = @_;
1225 my @kids = @$kids;
d989cdac
SM
1226 for (my $i = 0; $i < @kids; $i++) {
1227 my $expr = "";
1228 if (is_state $kids[$i]) {
09d856fb 1229 $expr = $self->deparse($kids[$i++], 0);
d989cdac 1230 if ($i > $#kids) {
09d856fb 1231 $callback->($expr, $i);
d989cdac
SM
1232 last;
1233 }
1234 }
1235 if (is_for_loop($kids[$i])) {
eae48c89
Z
1236 $callback->($expr . $self->for_loop($kids[$i], 0),
1237 $i += $kids[$i]->sibling->name eq "unstack" ? 2 : 1);
d989cdac
SM
1238 next;
1239 }
1240 $expr .= $self->deparse($kids[$i], (@kids != 1)/2);
1241 $expr =~ s/;\n?\z//;
09d856fb 1242 $callback->($expr, $i);
d989cdac
SM
1243 }
1244}
1245
6e90668e
SM
1246# The BEGIN {} is used here because otherwise this code isn't executed
1247# when you run B::Deparse on itself.
1248my %globalnames;
1249BEGIN { map($globalnames{$_}++, "SIG", "STDIN", "STDOUT", "STDERR", "INC",
1250 "ENV", "ARGV", "ARGVOUT", "_"); }
1251
1252sub gv_name {
1253 my $self = shift;
1254 my $gv = shift;
c6e79e55 1255Carp::confess() unless ref($gv) eq "B::GV";
6e90668e 1256 my $stash = $gv->STASH->NAME;
d9963e60 1257 my $name = $gv->SAFENAME;
8b2d6640
FC
1258 if ($stash eq 'main' && $name =~ /^::/) {
1259 $stash = '::';
1260 }
1261 elsif (($stash eq 'main' && $globalnames{$name})
1262 or ($stash eq $self->{'curstash'} && !$globalnames{$name}
1263 && ($stash eq 'main' || $name !~ /::/))
644838b9 1264 or $name =~ /^[^A-Za-z_:]/)
9d2c6865 1265 {
6e90668e
SM
1266 $stash = "";
1267 } else {
1268 $stash = $stash . "::";
a798dbf2 1269 }
083bda02
MS
1270 if ($name =~ /^(\^..|{)/) {
1271 $name = "{$name}"; # ${^WARNING_BITS}, etc and ${
6e90668e
SM
1272 }
1273 return $stash . $name;
a798dbf2
MB
1274}
1275
8510e997
RH
1276# Return the name to use for a stash variable.
1277# If a lexical with the same name is in scope, it may need to be
1278# fully-qualified.
1279sub stash_variable {
bb8996b8 1280 my ($self, $prefix, $name, $cx) = @_;
8510e997
RH
1281
1282 return "$prefix$name" if $name =~ /::/;
1283
d989cdac 1284 unless ($prefix eq '$' || $prefix eq '@' || #'
8510e997
RH
1285 $prefix eq '%' || $prefix eq '$#') {
1286 return "$prefix$name";
1287 }
1288
61154ac0
FC
1289 if ($name =~ /^[^\w+-]$/) {
1290 if (defined $cx && $cx == 26) {
1291 if ($prefix eq '@') {
bb8996b8
HY
1292 return "$prefix\{$name}";
1293 }
61154ac0
FC
1294 elsif ($name eq '#') { return '${#}' } # "${#}a" vs "$#a"
1295 }
1296 if ($prefix eq '$#') {
6ec73527 1297 return "\$#{$name}";
61154ac0 1298 }
6ec73527 1299 }
bb8996b8 1300
8510e997
RH
1301 my $v = ($prefix eq '$#' ? '@' : $prefix) . $name;
1302 return $prefix .$self->{'curstash'}.'::'. $name if $self->lex_in_scope($v);
1303 return "$prefix$name";
1304}
1305
1306sub lex_in_scope {
1307 my ($self, $name) = @_;
1308 $self->populate_curcvlex() if !defined $self->{'curcvlex'};
1309
6ec152c3 1310 return 0 if !defined($self->{'curcop'});
8510e997
RH
1311 my $seq = $self->{'curcop'}->cop_seq;
1312 return 0 if !exists $self->{'curcvlex'}{$name};
1313 for my $a (@{$self->{'curcvlex'}{$name}}) {
1314 my ($st, $en) = @$a;
1315 return 1 if $seq > $st && $seq <= $en;
1316 }
1317 return 0;
1318}
1319
1320sub populate_curcvlex {
1321 my $self = shift;
ce4e655d 1322 for (my $cv = $self->{'curcv'}; class($cv) eq "CV"; $cv = $cv->OUTSIDE) {
7dafbf52
DM
1323 my $padlist = $cv->PADLIST;
1324 # an undef CV still in lexical chain
1325 next if class($padlist) eq "SPECIAL";
1326 my @padlist = $padlist->ARRAY;
8510e997
RH
1327 my @ns = $padlist[0]->ARRAY;
1328
1329 for (my $i=0; $i<@ns; ++$i) {
1330 next if class($ns[$i]) eq "SPECIAL";
ce4e655d 1331 next if $ns[$i]->FLAGS & SVpad_OUR; # Skip "our" vars
0f2fe21d
RH
1332 if (class($ns[$i]) eq "PV") {
1333 # Probably that pesky lexical @_
1334 next;
1335 }
8510e997 1336 my $name = $ns[$i]->PVX;
7dafbf52
DM
1337 my ($seq_st, $seq_en) =
1338 ($ns[$i]->FLAGS & SVf_FAKE)
1339 ? (0, 999999)
809abb02 1340 : ($ns[$i]->COP_SEQ_RANGE_LOW, $ns[$i]->COP_SEQ_RANGE_HIGH);
8510e997
RH
1341
1342 push @{$self->{'curcvlex'}{$name}}, [$seq_st, $seq_en];
1343 }
1344 }
1345}
1346
ce4e655d
RH
1347sub find_scope_st { ((find_scope(@_))[0]); }
1348sub find_scope_en { ((find_scope(@_))[1]); }
1349
1350# Recurses down the tree, looking for pad variable introductions and COPs
1351sub find_scope {
1352 my ($self, $op, $scope_st, $scope_en) = @_;
ff97752d 1353 carp("Undefined op in find_scope") if !defined $op;
ce4e655d
RH
1354 return ($scope_st, $scope_en) unless $op->flags & OPf_KIDS;
1355
b6b46d6f
AB
1356 my @queue = ($op);
1357 while(my $op = shift @queue ) {
1358 for (my $o=$op->first; $$o; $o=$o->sibling) {
1359 if ($o->name =~ /^pad.v$/ && $o->private & OPpLVAL_INTRO) {
1360 my $s = int($self->padname_sv($o->targ)->COP_SEQ_RANGE_LOW);
1361 my $e = $self->padname_sv($o->targ)->COP_SEQ_RANGE_HIGH;
1362 $scope_st = $s if !defined($scope_st) || $s < $scope_st;
1363 $scope_en = $e if !defined($scope_en) || $e > $scope_en;
1364 return ($scope_st, $scope_en);
1365 }
1366 elsif (is_state($o)) {
1367 my $c = $o->cop_seq;
1368 $scope_st = $c if !defined($scope_st) || $c < $scope_st;
1369 $scope_en = $c if !defined($scope_en) || $c > $scope_en;
1370 return ($scope_st, $scope_en);
1371 }
1372 elsif ($o->flags & OPf_KIDS) {
1373 unshift (@queue, $o);
1374 }
34a48b4b
RH
1375 }
1376 }
ce4e655d
RH
1377
1378 return ($scope_st, $scope_en);
34a48b4b
RH
1379}
1380
1381# Returns a list of subs which should be inserted before the COP
1382sub cop_subs {
1383 my ($self, $op, $out_seq) = @_;
1384 my $seq = $op->cop_seq;
1385 # If we have nephews, then our sequence number indicates
1386 # the cop_seq of the end of some sort of scope.
1387 if (class($op->sibling) ne "NULL" && $op->sibling->flags & OPf_KIDS
ce4e655d
RH
1388 and my $nseq = $self->find_scope_st($op->sibling) ) {
1389 $seq = $nseq;
34a48b4b
RH
1390 }
1391 $seq = $out_seq if defined($out_seq) && $out_seq < $seq;
1392 return $self->seq_subs($seq);
1393}
1394
1395sub seq_subs {
1396 my ($self, $seq) = @_;
1397 my @text;
1398#push @text, "# ($seq)\n";
1399
ce4e655d 1400 return "" if !defined $seq;
34a48b4b
RH
1401 while (scalar(@{$self->{'subs_todo'}})
1402 and $seq > $self->{'subs_todo'}[0][0]) {
1403 push @text, $self->next_todo;
1404 }
1405 return @text;
1406}
1407
08c6f5ec 1408# Notice how subs and formats are inserted between statements here;
bc6b2ef6 1409# also $[ assignments and pragmas.
6e90668e
SM
1410sub pp_nextstate {
1411 my $self = shift;
9d2c6865 1412 my($op, $cx) = @_;
34a48b4b 1413 $self->{'curcop'} = $op;
6e90668e 1414 my @text;
34a48b4b 1415 push @text, $self->cop_subs($op);
11faa288 1416 my $stash = $op->stashpv;
6e90668e
SM
1417 if ($stash ne $self->{'curstash'}) {
1418 push @text, "package $stash;\n";
1419 $self->{'curstash'} = $stash;
1420 }
08c6f5ec 1421
bc6b2ef6
Z
1422 if (OPpCONST_ARYBASE && $self->{'arybase'} != $op->arybase) {
1423 push @text, '$[ = '. $op->arybase .";\n";
1424 $self->{'arybase'} = $op->arybase;
1425 }
1426
7a9b44b9
RH
1427 my $warnings = $op->warnings;
1428 my $warning_bits;
1429 if ($warnings->isa("B::SPECIAL") && $$warnings == 4) {
810aef70 1430 $warning_bits = $warnings::Bits{"all"} & WARN_MASK;
7a9b44b9 1431 }
e31885a0 1432 elsif ($warnings->isa("B::SPECIAL") && $$warnings == 5) {
810aef70 1433 $warning_bits = $warnings::NONE;
7a9b44b9 1434 }
e31885a0
RH
1435 elsif ($warnings->isa("B::SPECIAL")) {
1436 $warning_bits = undef;
1437 }
7a9b44b9 1438 else {
34a48b4b 1439 $warning_bits = $warnings->PV & WARN_MASK;
7a9b44b9
RH
1440 }
1441
e31885a0
RH
1442 if (defined ($warning_bits) and
1443 !defined($self->{warnings}) || $self->{'warnings'} ne $warning_bits) {
08c6f5ec 1444 push @text, declare_warnings($self->{'warnings'}, $warning_bits);
7a9b44b9
RH
1445 $self->{'warnings'} = $warning_bits;
1446 }
1447
2be95ceb
NC
1448 my $hints = $] < 5.008009 ? $op->private : $op->hints;
1449 if ($self->{'hints'} != $hints) {
1450 push @text, declare_hints($self->{'hints'}, $hints);
1451 $self->{'hints'} = $hints;
a0405c92
RH
1452 }
1453
e9c69003 1454 if ($] > 5.009 &&
c306e834
FC
1455 @text != push @text, declare_hinthash(
1456 $self->{'hinthash'}, $op->hints_hash->HASH,
1457 $self->{indent_size}
1458 )
1459 ) {
0ced6c29
RGS
1460 $self->{'hinthash'} = $op->hints_hash->HASH;
1461 }
1462
d989cdac
SM
1463 # This should go after of any branches that add statements, to
1464 # increase the chances that it refers to the same line it did in
1465 # the original program.
1466 if ($self->{'linenums'}) {
1467 push @text, "\f#line " . $op->line .
1468 ' "' . $op->file, qq'"\n';
1469 }
1470
98a1a137
Z
1471 push @text, $op->label . ": " if $op->label;
1472
6e90668e
SM
1473 return join("", @text);
1474}
1475
08c6f5ec
RH
1476sub declare_warnings {
1477 my ($from, $to) = @_;
e6f1f756 1478 if (($to & WARN_MASK) eq (warnings::bits("all") & WARN_MASK)) {
a0405c92
RH
1479 return "use warnings;\n";
1480 }
e6f1f756 1481 elsif (($to & WARN_MASK) eq ("\0"x length($to) & WARN_MASK)) {
a0405c92
RH
1482 return "no warnings;\n";
1483 }
51a5edaf 1484 return "BEGIN {\${^WARNING_BITS} = ".perlstring($to)."}\n";
a0405c92
RH
1485}
1486
1487sub declare_hints {
1488 my ($from, $to) = @_;
a0035eb8
RH
1489 my $use = $to & ~$from;
1490 my $no = $from & ~$to;
1491 my $decls = "";
1492 for my $pragma (hint_pragmas($use)) {
1493 $decls .= "use $pragma;\n";
1494 }
1495 for my $pragma (hint_pragmas($no)) {
1496 $decls .= "no $pragma;\n";
1497 }
1498 return $decls;
1499}
1500
493c23c6
NC
1501# Internal implementation hints that the core sets automatically, so don't need
1502# (or want) to be passed back to the user
1503my %ignored_hints = (
1504 'open<' => 1,
1505 'open>' => 1,
dca6062a 1506 ':' => 1,
2e8342de 1507);
493c23c6 1508
0ced6c29
RGS
1509sub declare_hinthash {
1510 my ($from, $to, $indent) = @_;
1511 my @decls;
1512 for my $key (keys %$to) {
493c23c6 1513 next if $ignored_hints{$key};
04be0204 1514 if (!exists $from->{$key} or $from->{$key} ne $to->{$key}) {
035146a3
FC
1515 push @decls,
1516 qq(\$^H{) . single_delim("q", "'", $key) . qq(} = )
1517 . (
1518 defined $to->{$key}
1519 ? single_delim("q", "'", $to->{$key})
1520 : 'undef'
1521 )
04be0204 1522 . qq(;);
0ced6c29
RGS
1523 }
1524 }
1525 for my $key (keys %$from) {
493c23c6 1526 next if $ignored_hints{$key};
0ced6c29
RGS
1527 if (!exists $to->{$key}) {
1528 push @decls, qq(delete \$^H{'$key'};);
1529 }
1530 }
c306e834 1531 @decls or return;
0ced6c29
RGS
1532 return join("\n" . (" " x $indent), "BEGIN {", @decls) . "\n}\n";
1533}
1534
a0035eb8
RH
1535sub hint_pragmas {
1536 my ($bits) = @_;
1537 my @pragmas;
1538 push @pragmas, "integer" if $bits & 0x1;
1539 push @pragmas, "strict 'refs'" if $bits & 0x2;
1540 push @pragmas, "bytes" if $bits & 0x8;
1541 return @pragmas;
08c6f5ec
RH
1542}
1543
6e90668e 1544sub pp_dbstate { pp_nextstate(@_) }
3f872cb9 1545sub pp_setstate { pp_nextstate(@_) }
6e90668e
SM
1546
1547sub pp_unstack { return "" } # see also leaveloop
1548
80e3f4ad
FC
1549my %feature_keywords = (
1550 # keyword => 'feature',
1551 state => 'state',
1552 say => 'say',
1553 given => 'switch',
1554 when => 'switch',
1555 default => 'switch',
e36901c8 1556 break => 'switch',
7d789282 1557 evalbytes=>'evalbytes',
84ed0108 1558 __SUB__ => '__SUB__',
80e3f4ad
FC
1559);
1560
4a1ac32e
FC
1561sub keyword {
1562 my $self = shift;
1563 my $name = shift;
1564 return $name if $name =~ /^CORE::/; # just in case
80e3f4ad 1565 if (exists $feature_keywords{$name}) {
7d789282
FC
1566 return "CORE::$name"
1567 if !$self->{'hinthash'}
1568 || !$self->{'hinthash'}{"feature_$feature_keywords{$name}"}
80e3f4ad 1569 }
4a1ac32e 1570 if (
a598d0e5 1571 $name !~ /^(?:chom?p|do|exec|glob|s(?:elect|ystem))\z/
4a1ac32e
FC
1572 && !defined eval{prototype "CORE::$name"}
1573 ) { return $name }
1574 if (
1575 exists $self->{subs_declared}{$name}
1576 or
1577 exists &{"$self->{curstash}::$name"}
1578 ) {
1579 return "CORE::$name"
1580 }
1581 return $name;
1582}
1583
6e90668e
SM
1584sub baseop {
1585 my $self = shift;
9d2c6865 1586 my($op, $cx, $name) = @_;
4a1ac32e 1587 return $self->keyword($name);
6e90668e
SM
1588}
1589
e99ebc55
RH
1590sub pp_stub {
1591 my $self = shift;
1592 my($op, $cx, $name) = @_;
d989cdac 1593 if ($cx >= 1) {
e99ebc55
RH
1594 return "()";
1595 }
1596 else {
1597 return "();";
1598 }
1599}
6e90668e
SM
1600sub pp_wantarray { baseop(@_, "wantarray") }
1601sub pp_fork { baseop(@_, "fork") }
3ed82cfc
GS
1602sub pp_wait { maybe_targmy(@_, \&baseop, "wait") }
1603sub pp_getppid { maybe_targmy(@_, \&baseop, "getppid") }
1604sub pp_time { maybe_targmy(@_, \&baseop, "time") }
6e90668e
SM
1605sub pp_tms { baseop(@_, "times") }
1606sub pp_ghostent { baseop(@_, "gethostent") }
1607sub pp_gnetent { baseop(@_, "getnetent") }
1608sub pp_gprotoent { baseop(@_, "getprotoent") }
1609sub pp_gservent { baseop(@_, "getservent") }
1610sub pp_ehostent { baseop(@_, "endhostent") }
1611sub pp_enetent { baseop(@_, "endnetent") }
1612sub pp_eprotoent { baseop(@_, "endprotoent") }
1613sub pp_eservent { baseop(@_, "endservent") }
1614sub pp_gpwent { baseop(@_, "getpwent") }
1615sub pp_spwent { baseop(@_, "setpwent") }
1616sub pp_epwent { baseop(@_, "endpwent") }
1617sub pp_ggrent { baseop(@_, "getgrent") }
1618sub pp_sgrent { baseop(@_, "setgrent") }
1619sub pp_egrent { baseop(@_, "endgrent") }
1620sub pp_getlogin { baseop(@_, "getlogin") }
1621
1622sub POSTFIX () { 1 }
1623
9d2c6865
SM
1624# I couldn't think of a good short name, but this is the category of
1625# symbolic unary operators with interesting precedence
1626
1627sub pfixop {
1628 my $self = shift;
1629 my($op, $cx, $name, $prec, $flags) = (@_, 0);
1630 my $kid = $op->first;
1631 $kid = $self->deparse($kid, $prec);
1632 return $self->maybe_parens(($flags & POSTFIX) ? "$kid$name" : "$name$kid",
1633 $cx, $prec);
1634}
1635
1636sub pp_preinc { pfixop(@_, "++", 23) }
1637sub pp_predec { pfixop(@_, "--", 23) }
3ed82cfc
GS
1638sub pp_postinc { maybe_targmy(@_, \&pfixop, "++", 23, POSTFIX) }
1639sub pp_postdec { maybe_targmy(@_, \&pfixop, "--", 23, POSTFIX) }
9d2c6865
SM
1640sub pp_i_preinc { pfixop(@_, "++", 23) }
1641sub pp_i_predec { pfixop(@_, "--", 23) }
3ed82cfc
GS
1642sub pp_i_postinc { maybe_targmy(@_, \&pfixop, "++", 23, POSTFIX) }
1643sub pp_i_postdec { maybe_targmy(@_, \&pfixop, "--", 23, POSTFIX) }
68cc8748 1644sub pp_complement { maybe_targmy(@_, \&pfixop, "~", 21) }
9d2c6865 1645
3ed82cfc
GS
1646sub pp_negate { maybe_targmy(@_, \&real_negate) }
1647sub real_negate {
9d2c6865
SM
1648 my $self = shift;
1649 my($op, $cx) = @_;
3f872cb9 1650 if ($op->first->name =~ /^(i_)?negate$/) {
9d2c6865
SM
1651 # avoid --$x
1652 $self->pfixop($op, $cx, "-", 21.5);
1653 } else {
1654 $self->pfixop($op, $cx, "-", 21);
1655 }
1656}
1657sub pp_i_negate { pp_negate(@_) }
1658
1659sub pp_not {
1660 my $self = shift;
1661 my($op, $cx) = @_;
1662 if ($cx <= 4) {
4a1ac32e 1663 $self->pfixop($op, $cx, $self->keyword("not")." ", 4);
9d2c6865
SM
1664 } else {
1665 $self->pfixop($op, $cx, "!", 21);
1666 }
1667}
1668
6e90668e
SM
1669sub unop {
1670 my $self = shift;
f4a44678 1671 my($op, $cx, $name) = @_;
6e90668e 1672 my $kid;
9d2c6865 1673 if ($op->flags & OPf_KIDS) {
aaf643ce 1674 $kid = $op->first;
1c85afce
YO
1675 if (not $name) {
1676 # this deals with 'boolkeys' right now
1677 return $self->deparse($kid,$cx);
1678 }
deb20ba3
RGS
1679 my $builtinname = $name;
1680 $builtinname =~ /^CORE::/ or $builtinname = "CORE::$name";
1681 if (defined prototype($builtinname)
1682 && prototype($builtinname) =~ /^;?\*/
e31885a0
RH
1683 && $kid->name eq "rv2gv") {
1684 $kid = $kid->first;
1685 }
1686
9d2c6865 1687 return $self->maybe_parens_unop($name, $kid, $cx);
6e90668e 1688 } else {
4a1ac32e
FC
1689 return $self->keyword($name)
1690 . ($op->flags & OPf_SPECIAL ? "()" : "");
6e90668e 1691 }
6e90668e
SM
1692}
1693
3ed82cfc
GS
1694sub pp_chop { maybe_targmy(@_, \&unop, "chop") }
1695sub pp_chomp { maybe_targmy(@_, \&unop, "chomp") }
1696sub pp_schop { maybe_targmy(@_, \&unop, "chop") }
1697sub pp_schomp { maybe_targmy(@_, \&unop, "chomp") }
6e90668e
SM
1698sub pp_defined { unop(@_, "defined") }
1699sub pp_undef { unop(@_, "undef") }
1700sub pp_study { unop(@_, "study") }
6e90668e
SM
1701sub pp_ref { unop(@_, "ref") }
1702sub pp_pos { maybe_local(@_, unop(@_, "pos")) }
1703
3ed82cfc
GS
1704sub pp_sin { maybe_targmy(@_, \&unop, "sin") }
1705sub pp_cos { maybe_targmy(@_, \&unop, "cos") }
1706sub pp_rand { maybe_targmy(@_, \&unop, "rand") }
6e90668e 1707sub pp_srand { unop(@_, "srand") }
3ed82cfc
GS
1708sub pp_exp { maybe_targmy(@_, \&unop, "exp") }
1709sub pp_log { maybe_targmy(@_, \&unop, "log") }
1710sub pp_sqrt { maybe_targmy(@_, \&unop, "sqrt") }
1711sub pp_int { maybe_targmy(@_, \&unop, "int") }
1712sub pp_hex { maybe_targmy(@_, \&unop, "hex") }
1713sub pp_oct { maybe_targmy(@_, \&unop, "oct") }
1714sub pp_abs { maybe_targmy(@_, \&unop, "abs") }
1715
1716sub pp_length { maybe_targmy(@_, \&unop, "length") }
1717sub pp_ord { maybe_targmy(@_, \&unop, "ord") }
1718sub pp_chr { maybe_targmy(@_, \&unop, "chr") }
6e90668e
SM
1719
1720sub pp_each { unop(@_, "each") }
1721sub pp_values { unop(@_, "values") }
1722sub pp_keys { unop(@_, "keys") }
09dcfa7d 1723{ no strict 'refs'; *{"pp_r$_"} = *{"pp_$_"} for qw< keys each values >; }
1c85afce
YO
1724sub pp_boolkeys {
1725 # no name because its an optimisation op that has no keyword
1726 unop(@_,"");
1727}
644741fd
NC
1728sub pp_aeach { unop(@_, "each") }
1729sub pp_avalues { unop(@_, "values") }
1730sub pp_akeys { unop(@_, "keys") }
6e90668e
SM
1731sub pp_pop { unop(@_, "pop") }
1732sub pp_shift { unop(@_, "shift") }
1733
1734sub pp_caller { unop(@_, "caller") }
1735sub pp_reset { unop(@_, "reset") }
1736sub pp_exit { unop(@_, "exit") }
1737sub pp_prototype { unop(@_, "prototype") }
1738
1739sub pp_close { unop(@_, "close") }
1740sub pp_fileno { unop(@_, "fileno") }
1741sub pp_umask { unop(@_, "umask") }
6e90668e
SM
1742sub pp_untie { unop(@_, "untie") }
1743sub pp_tied { unop(@_, "tied") }
1744sub pp_dbmclose { unop(@_, "dbmclose") }
1745sub pp_getc { unop(@_, "getc") }
1746sub pp_eof { unop(@_, "eof") }
1747sub pp_tell { unop(@_, "tell") }
1748sub pp_getsockname { unop(@_, "getsockname") }
1749sub pp_getpeername { unop(@_, "getpeername") }
1750
3ed82cfc
GS
1751sub pp_chdir { maybe_targmy(@_, \&unop, "chdir") }
1752sub pp_chroot { maybe_targmy(@_, \&unop, "chroot") }
6e90668e 1753sub pp_readlink { unop(@_, "readlink") }
3ed82cfc 1754sub pp_rmdir { maybe_targmy(@_, \&unop, "rmdir") }
6e90668e
SM
1755sub pp_readdir { unop(@_, "readdir") }
1756sub pp_telldir { unop(@_, "telldir") }
1757sub pp_rewinddir { unop(@_, "rewinddir") }
1758sub pp_closedir { unop(@_, "closedir") }
3ed82cfc 1759sub pp_getpgrp { maybe_targmy(@_, \&unop, "getpgrp") }
6e90668e
SM
1760sub pp_localtime { unop(@_, "localtime") }
1761sub pp_gmtime { unop(@_, "gmtime") }
1762sub pp_alarm { unop(@_, "alarm") }
3ed82cfc 1763sub pp_sleep { maybe_targmy(@_, \&unop, "sleep") }
6e90668e
SM
1764
1765sub pp_dofile { unop(@_, "do") }
7d789282
FC
1766sub pp_entereval {
1767 unop(
1768 @_,
1769 $_[1]->private & OPpEVAL_BYTES ? $_[0]->keyword('evalbytes') : "eval"
1770 )
1771}
6e90668e
SM
1772
1773sub pp_ghbyname { unop(@_, "gethostbyname") }
1774sub pp_gnbyname { unop(@_, "getnetbyname") }
1775sub pp_gpbyname { unop(@_, "getprotobyname") }
1776sub pp_shostent { unop(@_, "sethostent") }
1777sub pp_snetent { unop(@_, "setnetent") }
1778sub pp_sprotoent { unop(@_, "setprotoent") }
1779sub pp_sservent { unop(@_, "setservent") }
1780sub pp_gpwnam { unop(@_, "getpwnam") }
1781sub pp_gpwuid { unop(@_, "getpwuid") }
1782sub pp_ggrnam { unop(@_, "getgrnam") }
1783sub pp_ggrgid { unop(@_, "getgrgid") }
1784
1785sub pp_lock { unop(@_, "lock") }
1786
0d863452 1787sub pp_continue { unop(@_, "continue"); }
c08f093b 1788sub pp_break { unop(@_, "break"); }
0d863452
RH
1789
1790sub givwhen {
1791 my $self = shift;
1792 my($op, $cx, $givwhen) = @_;
1793
1794 my $enterop = $op->first;
1795 my ($head, $block);
1796 if ($enterop->flags & OPf_SPECIAL) {
80e3f4ad 1797 $head = $self->keyword("default");
0d863452
RH
1798 $block = $self->deparse($enterop->first, 0);
1799 }
1800 else {
1801 my $cond = $enterop->first;
1802 my $cond_str = $self->deparse($cond, 1);
1803 $head = "$givwhen ($cond_str)";
1804 $block = $self->deparse($cond->sibling, 0);
1805 }
1806
1807 return "$head {\n".
1808 "\t$block\n".
1809 "\b}\cK";
1810}
1811
80e3f4ad
FC
1812sub pp_leavegiven { givwhen(@_, $_[0]->keyword("given")); }
1813sub pp_leavewhen { givwhen(@_, $_[0]->keyword("when")); }
0d863452 1814
6e90668e
SM
1815sub pp_exists {
1816 my $self = shift;
9d2c6865 1817 my($op, $cx) = @_;
34a48b4b
RH
1818 my $arg;
1819 if ($op->private & OPpEXISTS_SUB) {
1820 # Checking for the existence of a subroutine
1821 return $self->maybe_parens_func("exists",
1822 $self->pp_rv2cv($op->first, 16), $cx, 16);
1823 }
1824 if ($op->flags & OPf_SPECIAL) {
1825 # Array element, not hash element
1826 return $self->maybe_parens_func("exists",
1827 $self->pp_aelem($op->first, 16), $cx, 16);
1828 }
9d2c6865
SM
1829 return $self->maybe_parens_func("exists", $self->pp_helem($op->first, 16),
1830 $cx, 16);
6e90668e
SM
1831}
1832
6e90668e
SM
1833sub pp_delete {
1834 my $self = shift;
9d2c6865 1835 my($op, $cx) = @_;
6e90668e
SM
1836 my $arg;
1837 if ($op->private & OPpSLICE) {
34a48b4b
RH
1838 if ($op->flags & OPf_SPECIAL) {
1839 # Deleting from an array, not a hash
1840 return $self->maybe_parens_func("delete",
1841 $self->pp_aslice($op->first, 16),
1842 $cx, 16);
1843 }
9d2c6865
SM
1844 return $self->maybe_parens_func("delete",
1845 $self->pp_hslice($op->first, 16),
1846 $cx, 16);
6e90668e 1847 } else {
34a48b4b
RH
1848 if ($op->flags & OPf_SPECIAL) {
1849 # Deleting from an array, not a hash
1850 return $self->maybe_parens_func("delete",
1851 $self->pp_aelem($op->first, 16),
1852 $cx, 16);
1853 }
9d2c6865
SM
1854 return $self->maybe_parens_func("delete",
1855 $self->pp_helem($op->first, 16),
1856 $cx, 16);
6e90668e 1857 }
6e90668e
SM
1858}
1859
6e90668e
SM
1860sub pp_require {
1861 my $self = shift;
9d2c6865 1862 my($op, $cx) = @_;
d5889722 1863 my $opname = $op->flags & OPf_SPECIAL ? 'CORE::require' : 'require';
3f872cb9 1864 if (class($op) eq "UNOP" and $op->first->name eq "const"
4c1f658f 1865 and $op->first->private & OPpCONST_BARE)
6e90668e 1866 {
18228111 1867 my $name = $self->const_sv($op->first)->PV;
6e90668e
SM
1868 $name =~ s[/][::]g;
1869 $name =~ s/\.pm//g;
d5889722 1870 return "$opname $name";
6e90668e 1871 } else {
30fcd6c4 1872 $self->unop($op, $cx, $op->first->private & OPpCONST_NOVER ? "no" : $opname);
6e90668e
SM
1873 }
1874}
1875
d989cdac 1876sub pp_scalar {
9d2c6865 1877 my $self = shift;
d9002312 1878 my($op, $cx) = @_;
9d2c6865
SM
1879 my $kid = $op->first;
1880 if (not null $kid->sibling) {
1881 # XXX Was a here-doc
1882 return $self->dquote($op);
1883 }
1884 $self->unop(@_, "scalar");
1885}
1886
1887
6e90668e
SM
1888sub padval {
1889 my $self = shift;
1890 my $targ = shift;
d989cdac 1891 return $self->{'curcv'}->PADLIST->ARRAYelt(1)->ARRAYelt($targ);
6e90668e
SM
1892}
1893
78c72037
NC
1894sub anon_hash_or_list {
1895 my $self = shift;
d9002312 1896 my($op, $cx) = @_;
78c72037
NC
1897
1898 my($pre, $post) = @{{"anonlist" => ["[","]"],
1899 "anonhash" => ["{","}"]}->{$op->name}};
1900 my($expr, @exprs);
1901 $op = $op->first->sibling; # skip pushmark
1902 for (; !null($op); $op = $op->sibling) {
1903 $expr = $self->deparse($op, 6);
1904 push @exprs, $expr;
1905 }
d9002312
SM
1906 if ($pre eq "{" and $cx < 1) {
1907 # Disambiguate that it's not a block
1908 $pre = "+{";
1909 }
78c72037
NC
1910 return $pre . join(", ", @exprs) . $post;
1911}
1912
1913sub pp_anonlist {
d9002312
SM
1914 my $self = shift;
1915 my ($op, $cx) = @_;
78c72037 1916 if ($op->flags & OPf_SPECIAL) {
d9002312 1917 return $self->anon_hash_or_list($op, $cx);
78c72037
NC
1918 }
1919 warn "Unexpected op pp_" . $op->name() . " without OPf_SPECIAL";
1920 return 'XXX';
1921}
1922
1923*pp_anonhash = \&pp_anonlist;
1924
6e90668e
SM
1925sub pp_refgen {
1926 my $self = shift;
9d2c6865 1927 my($op, $cx) = @_;
6e90668e 1928 my $kid = $op->first;
3f872cb9 1929 if ($kid->name eq "null") {
6e90668e 1930 $kid = $kid->first;
35925e80 1931 if (!null($kid->sibling) and
3f872cb9 1932 $kid->sibling->name eq "anoncode") {
09d856fb 1933 return $self->e_anoncode({ code => $self->padval($kid->sibling->targ) });
3f872cb9
GS
1934 } elsif ($kid->name eq "pushmark") {
1935 my $sib_name = $kid->sibling->name;
1936 if ($sib_name =~ /^(pad|rv2)[ah]v$/
c8c62db7
AD
1937 and not $kid->sibling->flags & OPf_REF)
1938 {
1939 # The @a in \(@a) isn't in ref context, but only when the
1940 # parens are there.
127212b2 1941 return "\\(" . $self->pp_list($op->first) . ")";
3f872cb9 1942 } elsif ($sib_name eq 'entersub') {
c8c62db7
AD
1943 my $text = $self->deparse($kid->sibling, 1);
1944 # Always show parens for \(&func()), but only with -p otherwise
1945 $text = "($text)" if $self->{'parens'}
1946 or $kid->sibling->private & OPpENTERSUB_AMPER;
1947 return "\\$text";
1948 }
1949 }
6e90668e 1950 }
9d2c6865 1951 $self->pfixop($op, $cx, "\\", 20);
6e90668e
SM
1952}
1953
09d856fb
CK
1954sub e_anoncode {
1955 my ($self, $info) = @_;
1956 my $text = $self->deparse_sub($info->{code});
1957 return "sub " . $text;
1958}
1959
6e90668e
SM
1960sub pp_srefgen { pp_refgen(@_) }
1961
1962sub pp_readline {
1963 my $self = shift;
9d2c6865 1964 my($op, $cx) = @_;
6e90668e 1965 my $kid = $op->first;
3f872cb9 1966 $kid = $kid->first if $kid->name eq "rv2gv"; # <$fh>
e31885a0
RH
1967 return "<" . $self->deparse($kid, 1) . ">" if is_scalar($kid);
1968 return $self->unop($op, $cx, "readline");
6e90668e
SM
1969}
1970
ad8caead
RGS
1971sub pp_rcatline {
1972 my $self = shift;
1973 my($op) = @_;
d989cdac 1974 return "<" . $self->gv_name($self->gv_or_padgv($op)) . ">";
ad8caead
RGS
1975}
1976
bd0865ec
GS
1977# Unary operators that can occur as pseudo-listops inside double quotes
1978sub dq_unop {
1979 my $self = shift;
1980 my($op, $cx, $name, $prec, $flags) = (@_, 0, 0);
1981 my $kid;
1982 if ($op->flags & OPf_KIDS) {
1983 $kid = $op->first;
1984 # If there's more than one kid, the first is an ex-pushmark.
1985 $kid = $kid->sibling if not null $kid->sibling;
1986 return $self->maybe_parens_unop($name, $kid, $cx);
1987 } else {
d989cdac 1988 return $name . ($op->flags & OPf_SPECIAL ? "()" : "");
bd0865ec
GS
1989 }
1990}
1991
1992sub pp_ucfirst { dq_unop(@_, "ucfirst") }
1993sub pp_lcfirst { dq_unop(@_, "lcfirst") }
1994sub pp_uc { dq_unop(@_, "uc") }
1995sub pp_lc { dq_unop(@_, "lc") }
3ed82cfc 1996sub pp_quotemeta { maybe_targmy(@_, \&dq_unop, "quotemeta") }
bd0865ec 1997
6e90668e
SM
1998sub loopex {
1999 my $self = shift;
9d2c6865 2000 my ($op, $cx, $name) = @_;
6e90668e 2001 if (class($op) eq "PVOP") {
9d2c6865
SM
2002 return "$name " . $op->pv;
2003 } elsif (class($op) eq "OP") {
2004 return $name;
6e90668e 2005 } elsif (class($op) eq "UNOP") {
9d2c6865
SM
2006 # Note -- loop exits are actually exempt from the
2007 # looks-like-a-func rule, but a few extra parens won't hurt
2008 return $self->maybe_parens_unop($name, $op->first, $cx);
6e90668e 2009 }
6e90668e
SM
2010}
2011
2012sub pp_last { loopex(@_, "last") }
2013sub pp_next { loopex(@_, "next") }
2014sub pp_redo { loopex(@_, "redo") }
2015sub pp_goto { loopex(@_, "goto") }
4a1ac32e 2016sub pp_dump { loopex(@_, $_[0]->keyword("dump")) }
6e90668e
SM
2017
2018sub ftst {
2019 my $self = shift;
9d2c6865 2020 my($op, $cx, $name) = @_;
6e90668e 2021 if (class($op) eq "UNOP") {
e38ccfd9 2022 # Genuine '-X' filetests are exempt from the LLAFR, but not
9d2c6865
SM
2023 # l?stat(); for the sake of clarity, give'em all parens
2024 return $self->maybe_parens_unop($name, $op->first, $cx);
d989cdac 2025 } elsif (class($op) =~ /^(SV|PAD)OP$/) {
9d2c6865 2026 return $self->maybe_parens_func($name, $self->pp_gv($op, 1), $cx, 16);
6e90668e 2027 } else { # I don't think baseop filetests ever survive ck_ftst, but...
9d2c6865 2028 return $name;
6e90668e 2029 }
6e90668e
SM
2030}
2031
d989cdac
SM
2032sub pp_lstat { ftst(@_, "lstat") }
2033sub pp_stat { ftst(@_, "stat") }
2034sub pp_ftrread { ftst(@_, "-R") }
6e90668e 2035sub pp_ftrwrite { ftst(@_, "-W") }
d989cdac
SM
2036sub pp_ftrexec { ftst(@_, "-X") }
2037sub pp_fteread { ftst(@_, "-r") }
e31885a0 2038sub pp_ftewrite { ftst(@_, "-w") }
d989cdac
SM
2039sub pp_fteexec { ftst(@_, "-x") }
2040sub pp_ftis { ftst(@_, "-e") }
6e90668e
SM
2041sub pp_fteowned { ftst(@_, "-O") }
2042sub pp_ftrowned { ftst(@_, "-o") }
d989cdac
SM
2043sub pp_ftzero { ftst(@_, "-z") }
2044sub pp_ftsize { ftst(@_, "-s") }
2045sub pp_ftmtime { ftst(@_, "-M") }
2046sub pp_ftatime { ftst(@_, "-A") }
2047sub pp_ftctime { ftst(@_, "-C") }
2048sub pp_ftsock { ftst(@_, "-S") }
2049sub pp_ftchr { ftst(@_, "-c") }
2050sub pp_ftblk { ftst(@_, "-b") }
2051sub pp_ftfile { ftst(@_, "-f") }
2052sub pp_ftdir { ftst(@_, "-d") }
2053sub pp_ftpipe { ftst(@_, "-p") }
2054sub pp_ftlink { ftst(@_, "-l") }
2055sub pp_ftsuid { ftst(@_, "-u") }
2056sub pp_ftsgid { ftst(@_, "-g") }
2057sub pp_ftsvtx { ftst(@_, "-k") }
2058sub pp_fttty { ftst(@_, "-t") }
2059sub pp_fttext { ftst(@_, "-T") }
6e90668e
SM
2060sub pp_ftbinary { ftst(@_, "-B") }
2061
a798dbf2 2062sub SWAP_CHILDREN () { 1 }
6e90668e 2063sub ASSIGN () { 2 } # has OP= variant
7013e6ae 2064sub LIST_CONTEXT () { 4 } # Assignment is in list context
6e90668e 2065
9d2c6865
SM
2066my(%left, %right);
2067
2068sub assoc_class {
2069 my $op = shift;
3f872cb9
GS
2070 my $name = $op->name;
2071 if ($name eq "concat" and $op->first->name eq "concat") {
e38ccfd9 2072 # avoid spurious '=' -- see comment in pp_concat
3f872cb9 2073 return "concat";
9d2c6865 2074 }
3f872cb9
GS
2075 if ($name eq "null" and class($op) eq "UNOP"
2076 and $op->first->name =~ /^(and|x?or)$/
9d2c6865
SM
2077 and null $op->first->sibling)
2078 {
2079 # Like all conditional constructs, OP_ANDs and OP_ORs are topped
2080 # with a null that's used as the common end point of the two
2081 # flows of control. For precedence purposes, ignore it.
2082 # (COND_EXPRs have these too, but we don't bother with
2083 # their associativity).
2084 return assoc_class($op->first);
2085 }
2086 return $name . ($op->flags & OPf_STACKED ? "=" : "");
2087}
2088
e38ccfd9 2089# Left associative operators, like '+', for which
9d2c6865
SM
2090# $a + $b + $c is equivalent to ($a + $b) + $c
2091
2092BEGIN {
3f872cb9
GS
2093 %left = ('multiply' => 19, 'i_multiply' => 19,
2094 'divide' => 19, 'i_divide' => 19,
2095 'modulo' => 19, 'i_modulo' => 19,
2096 'repeat' => 19,
2097 'add' => 18, 'i_add' => 18,
2098 'subtract' => 18, 'i_subtract' => 18,
2099 'concat' => 18,
2100 'left_shift' => 17, 'right_shift' => 17,
2101 'bit_and' => 13,
2102 'bit_or' => 12, 'bit_xor' => 12,
2103 'and' => 3,
2104 'or' => 2, 'xor' => 2,
9d2c6865
SM
2105 );
2106}
2107
2108sub deparse_binop_left {
2109 my $self = shift;
2110 my($op, $left, $prec) = @_;
58231d39 2111 if ($left{assoc_class($op)} && $left{assoc_class($left)}
9d2c6865
SM
2112 and $left{assoc_class($op)} == $left{assoc_class($left)})
2113 {
2114 return $self->deparse($left, $prec - .00001);
2115 } else {
2116 return $self->deparse($left, $prec);
2117 }
2118}
2119
e38ccfd9 2120# Right associative operators, like '=', for which
9d2c6865
SM
2121# $a = $b = $c is equivalent to $a = ($b = $c)
2122
2123BEGIN {
3f872cb9
GS
2124 %right = ('pow' => 22,
2125 'sassign=' => 7, 'aassign=' => 7,
2126 'multiply=' => 7, 'i_multiply=' => 7,
2127 'divide=' => 7, 'i_divide=' => 7,
2128 'modulo=' => 7, 'i_modulo=' => 7,
2129 'repeat=' => 7,
2130 'add=' => 7, 'i_add=' => 7,
2131 'subtract=' => 7, 'i_subtract=' => 7,
2132 'concat=' => 7,
2133 'left_shift=' => 7, 'right_shift=' => 7,
2134 'bit_and=' => 7,
2135 'bit_or=' => 7, 'bit_xor=' => 7,
2136 'andassign' => 7,
2137 'orassign' => 7,
9d2c6865
SM
2138 );
2139}
2140
2141sub deparse_binop_right {
2142 my $self = shift;
2143 my($op, $right, $prec) = @_;
58231d39 2144 if ($right{assoc_class($op)} && $right{assoc_class($right)}
9d2c6865
SM
2145 and $right{assoc_class($op)} == $right{assoc_class($right)})
2146 {
2147 return $self->deparse($right, $prec - .00001);
2148 } else {
2149 return $self->deparse($right, $prec);
2150 }
2151}
2152
a798dbf2 2153sub binop {
6e90668e 2154 my $self = shift;
9d2c6865 2155 my ($op, $cx, $opname, $prec, $flags) = (@_, 0);
a798dbf2
MB
2156 my $left = $op->first;
2157 my $right = $op->last;
9d2c6865
SM
2158 my $eq = "";
2159 if ($op->flags & OPf_STACKED && $flags & ASSIGN) {
2160 $eq = "=";
2161 $prec = 7;
2162 }
a798dbf2
MB
2163 if ($flags & SWAP_CHILDREN) {
2164 ($left, $right) = ($right, $left);
2165 }
9d2c6865 2166 $left = $self->deparse_binop_left($op, $left, $prec);
90c0eb26
RH
2167 $left = "($left)" if $flags & LIST_CONTEXT
2168 && $left !~ /^(my|our|local|)[\@\(]/;
9d2c6865
SM
2169 $right = $self->deparse_binop_right($op, $right, $prec);
2170 return $self->maybe_parens("$left $opname$eq $right", $cx, $prec);
2171}
2172
3ed82cfc
GS
2173sub pp_add { maybe_targmy(@_, \&binop, "+", 18, ASSIGN) }
2174sub pp_multiply { maybe_targmy(@_, \&binop, "*", 19, ASSIGN) }
2175sub pp_subtract { maybe_targmy(@_, \&binop, "-",18, ASSIGN) }
2176sub pp_divide { maybe_targmy(@_, \&binop, "/", 19, ASSIGN) }
2177sub pp_modulo { maybe_targmy(@_, \&binop, "%", 19, ASSIGN) }
2178sub pp_i_add { maybe_targmy(@_, \&binop, "+", 18, ASSIGN) }
2179sub pp_i_multiply { maybe_targmy(@_, \&binop, "*", 19, ASSIGN) }
2180sub pp_i_subtract { maybe_targmy(@_, \&binop, "-", 18, ASSIGN) }
2181sub pp_i_divide { maybe_targmy(@_, \&binop, "/", 19, ASSIGN) }
2182sub pp_i_modulo { maybe_targmy(@_, \&binop, "%", 19, ASSIGN) }
2183sub pp_pow { maybe_targmy(@_, \&binop, "**", 22, ASSIGN) }
2184
2185sub pp_left_shift { maybe_targmy(@_, \&binop, "<<", 17, ASSIGN) }
2186sub pp_right_shift { maybe_targmy(@_, \&binop, ">>", 17, ASSIGN) }
2187sub pp_bit_and { maybe_targmy(@_, \&binop, "&", 13, ASSIGN) }
2188sub pp_bit_or { maybe_targmy(@_, \&binop, "|", 12, ASSIGN) }
2189sub pp_bit_xor { maybe_targmy(@_, \&binop, "^", 12, ASSIGN) }
9d2c6865
SM
2190
2191sub pp_eq { binop(@_, "==", 14) }
2192sub pp_ne { binop(@_, "!=", 14) }
2193sub pp_lt { binop(@_, "<", 15) }
2194sub pp_gt { binop(@_, ">", 15) }
2195sub pp_ge { binop(@_, ">=", 15) }
2196sub pp_le { binop(@_, "<=", 15) }
2197sub pp_ncmp { binop(@_, "<=>", 14) }
2198sub pp_i_eq { binop(@_, "==", 14) }
2199sub pp_i_ne { binop(@_, "!=", 14) }
2200sub pp_i_lt { binop(@_, "<", 15) }
2201sub pp_i_gt { binop(@_, ">", 15) }
2202sub pp_i_ge { binop(@_, ">=", 15) }
2203sub pp_i_le { binop(@_, "<=", 15) }
2204sub pp_i_ncmp { binop(@_, "<=>", 14) }
2205
2206sub pp_seq { binop(@_, "eq", 14) }
2207sub pp_sne { binop(@_, "ne", 14) }
2208sub pp_slt { binop(@_, "lt", 15) }
2209sub pp_sgt { binop(@_, "gt", 15) }
2210sub pp_sge { binop(@_, "ge", 15) }
2211sub pp_sle { binop(@_, "le", 15) }
2212sub pp_scmp { binop(@_, "cmp", 14) }
2213
2214sub pp_sassign { binop(@_, "=", 7, SWAP_CHILDREN) }
7013e6ae 2215sub pp_aassign { binop(@_, "=", 7, SWAP_CHILDREN | LIST_CONTEXT) }
6e90668e 2216
0d863452
RH
2217sub pp_smartmatch {
2218 my ($self, $op, $cx) = @_;
2219 if ($op->flags & OPf_SPECIAL) {
9210de83 2220 return $self->deparse($op->last, $cx);
0d863452
RH
2221 }
2222 else {
2223 binop(@_, "~~", 14);
2224 }
2225}
2226
e38ccfd9 2227# '.' is special because concats-of-concats are optimized to save copying
6e90668e 2228# by making all but the first concat stacked. The effect is as if the
e38ccfd9 2229# programmer had written '($a . $b) .= $c', except legal.
3ed82cfc
GS
2230sub pp_concat { maybe_targmy(@_, \&real_concat) }
2231sub real_concat {
6e90668e 2232 my $self = shift;
9d2c6865 2233 my($op, $cx) = @_;
6e90668e
SM
2234 my $left = $op->first;
2235 my $right = $op->last;
2236 my $eq = "";
9d2c6865 2237 my $prec = 18;
3f872cb9 2238 if ($op->flags & OPf_STACKED and $op->first->name ne "concat") {
6e90668e 2239 $eq = "=";
9d2c6865 2240 $prec = 7;
6e90668e 2241 }
9d2c6865
SM
2242 $left = $self->deparse_binop_left($op, $left, $prec);
2243 $right = $self->deparse_binop_right($op, $right, $prec);
2244 return $self->maybe_parens("$left .$eq $right", $cx, $prec);
6e90668e
SM
2245}
2246
e38ccfd9 2247# 'x' is weird when the left arg is a list
6e90668e
SM
2248sub pp_repeat {
2249 my $self = shift;
9d2c6865 2250 my($op, $cx) = @_;
6e90668e
SM
2251 my $left = $op->first;
2252 my $right = $op->last;
9d2c6865
SM
2253 my $eq = "";
2254 my $prec = 19;
2255 if ($op->flags & OPf_STACKED) {
2256 $eq = "=";
2257 $prec = 7;
2258 }
6e90668e
SM
2259 if (null($right)) { # list repeat; count is inside left-side ex-list
2260 my $kid = $left->first->sibling; # skip pushmark
2261 my @exprs;
2262 for (; !null($kid->sibling); $kid = $kid->sibling) {
9d2c6865 2263 push @exprs, $self->deparse($kid, 6);
6e90668e
SM
2264 }
2265 $right = $kid;
2266 $left = "(" . join(", ", @exprs). ")";
2267 } else {
9d2c6865 2268 $left = $self->deparse_binop_left($op, $left, $prec);
6e90668e 2269 }
9d2c6865
SM
2270 $right = $self->deparse_binop_right($op, $right, $prec);
2271 return $self->maybe_parens("$left x$eq $right", $cx, $prec);
6e90668e
SM
2272}
2273
2274sub range {
2275 my $self = shift;
9d2c6865 2276 my ($op, $cx, $type) = @_;
6e90668e
SM
2277 my $left = $op->first;
2278 my $right = $left->sibling;
9d2c6865
SM
2279 $left = $self->deparse($left, 9);
2280 $right = $self->deparse($right, 9);
2281 return $self->maybe_parens("$left $type $right", $cx, 9);
6e90668e
SM
2282}
2283
2284sub pp_flop {
2285 my $self = shift;
9d2c6865 2286 my($op, $cx) = @_;
6e90668e
SM
2287 my $flip = $op->first;
2288 my $type = ($flip->flags & OPf_SPECIAL) ? "..." : "..";
9d2c6865 2289 return $self->range($flip->first, $cx, $type);
6e90668e
SM
2290}
2291
2292# one-line while/until is handled in pp_leave
2293
2294sub logop {
2295 my $self = shift;
9d2c6865 2296 my ($op, $cx, $lowop, $lowprec, $highop, $highprec, $blockname) = @_;
6e90668e
SM
2297 my $left = $op->first;
2298 my $right = $op->first->sibling;
d989cdac 2299 if ($cx < 1 and is_scope($right) and $blockname
58cccf98
SM
2300 and $self->{'expand'} < 7)
2301 { # if ($a) {$b}
9d2c6865
SM
2302 $left = $self->deparse($left, 1);
2303 $right = $self->deparse($right, 0);
2304 return "$blockname ($left) {\n\t$right\n\b}\cK";
d989cdac 2305 } elsif ($cx < 1 and $blockname and not $self->{'parens'}
58cccf98 2306 and $self->{'expand'} < 7) { # $b if $a
9d2c6865
SM
2307 $right = $self->deparse($right, 1);
2308 $left = $self->deparse($left, 1);
2309 return "$right $blockname $left";
2310 } elsif ($cx > $lowprec and $highop) { # $a && $b
2311 $left = $self->deparse_binop_left($op, $left, $highprec);
2312 $right = $self->deparse_binop_right($op, $right, $highprec);
2313 return $self->maybe_parens("$left $highop $right", $cx, $highprec);
2314 } else { # $a and $b
2315 $left = $self->deparse_binop_left($op, $left, $lowprec);
2316 $right = $self->deparse_binop_right($op, $right, $lowprec);
d989cdac 2317 return $self->maybe_parens("$left $lowop $right", $cx, $lowprec);
9d2c6865
SM
2318 }
2319}
2320
2321sub pp_and { logop(@_, "and", 3, "&&", 11, "if") }
f4a44678 2322sub pp_or { logop(@_, "or", 2, "||", 10, "unless") }
5b99f273 2323sub pp_dor { logop(@_, "//", 10) }
3ed82cfc
GS
2324
2325# xor is syntactically a logop, but it's really a binop (contrary to
2326# old versions of opcode.pl). Syntax is what matters here.
9d2c6865 2327sub pp_xor { logop(@_, "xor", 2, "", 0, "") }
6e90668e
SM
2328
2329sub logassignop {
2330 my $self = shift;
9d2c6865 2331 my ($op, $cx, $opname) = @_;
6e90668e
SM
2332 my $left = $op->first;
2333 my $right = $op->first->sibling->first; # skip sassign
9d2c6865
SM
2334 $left = $self->deparse($left, 7);
2335 $right = $self->deparse($right, 7);
2336 return $self->maybe_parens("$left $opname $right", $cx, 7);
a798dbf2
MB
2337}
2338
6e90668e 2339sub pp_andassign { logassignop(@_, "&&=") }
c963b151
BD
2340sub pp_orassign { logassignop(@_, "||=") }
2341sub pp_dorassign { logassignop(@_, "//=") }
6e90668e
SM
2342
2343sub listop {
2344 my $self = shift;
24fcb59f 2345 my($op, $cx, $name, $kid) = @_;
9d2c6865
SM
2346 my(@exprs);
2347 my $parens = ($cx >= 5) || $self->{'parens'};
24fcb59f 2348 $kid ||= $op->first->sibling;
4a1ac32e 2349 return $self->keyword($name) if null $kid;
e31885a0 2350 my $first;
fb725297 2351 $name = "socketpair" if $name eq "sockpair";
4a1ac32e 2352 my $fullname = $self->keyword($name);
b72c97e8
RGS
2353 my $proto = prototype("CORE::$name");
2354 if (defined $proto
2355 && $proto =~ /^;?\*/
e31885a0
RH
2356 && $kid->name eq "rv2gv") {
2357 $first = $self->deparse($kid->first, 6);
2358 }
2359 else {
2360 $first = $self->deparse($kid, 6);
2361 }
e99ebc55 2362 if ($name eq "chmod" && $first =~ /^\d+$/) {
a0035eb8 2363 $first = sprintf("%#o", $first);
e99ebc55 2364 }
9d2c6865
SM
2365 $first = "+$first" if not $parens and substr($first, 0, 1) eq "(";
2366 push @exprs, $first;
2367 $kid = $kid->sibling;
e1f56625 2368 if (defined $proto && $proto =~ /^\*\*/ && $kid->name eq "rv2gv") {
b72c97e8
RGS
2369 push @exprs, $self->deparse($kid->first, 6);
2370 $kid = $kid->sibling;
2371 }
9d2c6865
SM
2372 for (; !null($kid); $kid = $kid->sibling) {
2373 push @exprs, $self->deparse($kid, 6);
2374 }
689e417f 2375 if ($name eq "reverse" && ($op->private & OPpREVERSE_INPLACE)) {
4a1ac32e
FC
2376 return "$exprs[0] = $fullname"
2377 . ($parens ? "($exprs[0])" : " $exprs[0]");
689e417f 2378 }
9d2c6865 2379 if ($parens) {
4a1ac32e 2380 return "$fullname(" . join(", ", @exprs) . ")";
9d2c6865 2381 } else {
4a1ac32e 2382 return "$fullname " . join(", ", @exprs);
6e90668e 2383 }
6e90668e 2384}
a798dbf2 2385
6e90668e 2386sub pp_bless { listop(@_, "bless") }
3ed82cfc 2387sub pp_atan2 { maybe_targmy(@_, \&listop, "atan2") }
24fcb59f
FC
2388sub pp_substr {
2389 my ($self,$op,$cx) = @_;
2390 if ($op->private & OPpSUBSTR_REPL_FIRST) {
2391 return
2392 listop($self, $op, 7, "substr", $op->first->sibling->sibling)
2393 . " = "
2394 . $self->deparse($op->first->sibling, 7);
2395 }
2396 maybe_local(@_, listop(@_, "substr"))
2397}
6e90668e 2398sub pp_vec { maybe_local(@_, listop(@_, "vec")) }
3ed82cfc
GS
2399sub pp_index { maybe_targmy(@_, \&listop, "index") }
2400sub pp_rindex { maybe_targmy(@_, \&listop, "rindex") }
2401sub pp_sprintf { maybe_targmy(@_, \&listop, "sprintf") }
6e90668e 2402sub pp_formline { listop(@_, "formline") } # see also deparse_format
3ed82cfc 2403sub pp_crypt { maybe_targmy(@_, \&listop, "crypt") }
6e90668e
SM
2404sub pp_unpack { listop(@_, "unpack") }
2405sub pp_pack { listop(@_, "pack") }
3ed82cfc 2406sub pp_join { maybe_targmy(@_, \&listop, "join") }
6e90668e 2407sub pp_splice { listop(@_, "splice") }
3ed82cfc
GS
2408sub pp_push { maybe_targmy(@_, \&listop, "push") }
2409sub pp_unshift { maybe_targmy(@_, \&listop, "unshift") }
6e90668e
SM
2410sub pp_reverse { listop(@_, "reverse") }
2411sub pp_warn { listop(@_, "warn") }
2412sub pp_die { listop(@_, "die") }
9d2c6865
SM
2413# Actually, return is exempt from the LLAFR (see examples in this very
2414# module!), but for consistency's sake, ignore that fact
6e90668e
SM
2415sub pp_return { listop(@_, "return") }
2416sub pp_open { listop(@_, "open") }
2417sub pp_pipe_op { listop(@_, "pipe") }
2418sub pp_tie { listop(@_, "tie") }
82bafd27 2419sub pp_binmode { listop(@_, "binmode") }
6e90668e
SM
2420sub pp_dbmopen { listop(@_, "dbmopen") }
2421sub pp_sselect { listop(@_, "select") }
2422sub pp_select { listop(@_, "select") }
2423sub pp_read { listop(@_, "read") }
2424sub pp_sysopen { listop(@_, "sysopen") }
2425sub pp_sysseek { listop(@_, "sysseek") }
2426sub pp_sysread { listop(@_, "sysread") }
2427sub pp_syswrite { listop(@_, "syswrite") }
2428sub pp_send { listop(@_, "send") }
2429sub pp_recv { listop(@_, "recv") }
2430sub pp_seek { listop(@_, "seek") }
6e90668e
SM
2431sub pp_fcntl { listop(@_, "fcntl") }
2432sub pp_ioctl { listop(@_, "ioctl") }
3ed82cfc 2433sub pp_flock { maybe_targmy(@_, \&listop, "flock") }
6e90668e
SM
2434sub pp_socket { listop(@_, "socket") }
2435sub pp_sockpair { listop(@_, "sockpair") }
2436sub pp_bind { listop(@_, "bind") }
2437sub pp_connect { listop(@_, "connect") }
2438sub pp_listen { listop(@_, "listen") }
2439sub pp_accept { listop(@_, "accept") }
2440sub pp_shutdown { listop(@_, "shutdown") }
2441sub pp_gsockopt { listop(@_, "getsockopt") }
2442sub pp_ssockopt { listop(@_, "setsockopt") }
3ed82cfc
GS
2443sub pp_chown { maybe_targmy(@_, \&listop, "chown") }
2444sub pp_unlink { maybe_targmy(@_, \&listop, "unlink") }
2445sub pp_chmod { maybe_targmy(@_, \&listop, "chmod") }
2446sub pp_utime { maybe_targmy(@_, \&listop, "utime") }
2447sub pp_rename { maybe_targmy(@_, \&listop, "rename") }
2448sub pp_link { maybe_targmy(@_, \&listop, "link") }
2449sub pp_symlink { maybe_targmy(@_, \&listop, "symlink") }
2450sub pp_mkdir { maybe_targmy(@_, \&listop, "mkdir") }
6e90668e
SM
2451sub pp_open_dir { listop(@_, "opendir") }
2452sub pp_seekdir { listop(@_, "seekdir") }
3ed82cfc
GS
2453sub pp_waitpid { maybe_targmy(@_, \&listop, "waitpid") }
2454sub pp_system { maybe_targmy(@_, \&listop, "system") }
2455sub pp_exec { maybe_targmy(@_, \&listop, "exec") }
2456sub pp_kill { maybe_targmy(@_, \&listop, "kill") }
2457sub pp_setpgrp { maybe_targmy(@_, \&listop, "setpgrp") }
2458sub pp_getpriority { maybe_targmy(@_, \&listop, "getpriority") }
2459sub pp_setpriority { maybe_targmy(@_, \&listop, "setpriority") }
6e90668e
SM
2460sub pp_shmget { listop(@_, "shmget") }
2461sub pp_shmctl { listop(@_, "shmctl") }
2462sub pp_shmread { listop(@_, "shmread") }
2463sub pp_shmwrite { listop(@_, "shmwrite") }
2464sub pp_msgget { listop(@_, "msgget") }
2465sub pp_msgctl { listop(@_, "msgctl") }
2466sub pp_msgsnd { listop(@_, "msgsnd") }
2467sub pp_msgrcv { listop(@_, "msgrcv") }
2468sub pp_semget { listop(@_, "semget") }
2469sub pp_semctl { listop(@_, "semctl") }
2470sub pp_semop { listop(@_, "semop") }
2471sub pp_ghbyaddr { listop(@_, "gethostbyaddr") }
2472sub pp_gnbyaddr { listop(@_, "getnetbyaddr") }
2473sub pp_gpbynumber { listop(@_, "getprotobynumber") }
2474sub pp_gsbyname { listop(@_, "getservbyname") }
2475sub pp_gsbyport { listop(@_, "getservbyport") }
2476sub pp_syscall { listop(@_, "syscall") }
2477
2478sub pp_glob {
2479 my $self = shift;
9d2c6865 2480 my($op, $cx) = @_;
6e90668e 2481 my $text = $self->dq($op->first->sibling); # skip pushmark
a32fbbd8
FC
2482 my $keyword =
2483 $op->flags & OPf_SPECIAL ? 'glob' : $self->keyword('glob');
6e90668e 2484 if ($text =~ /^\$?(\w|::|\`)+$/ # could look like a readline
a32fbbd8
FC
2485 or $keyword =~ /^CORE::/
2486 or $text =~ /[<>]/) {
2487 return "$keyword(" . single_delim('qq', '"', $text) . ')';
6e90668e
SM
2488 } else {
2489 return '<' . $text . '>';
2490 }
2491}
2492
f5aa8f4e
SM
2493# Truncate is special because OPf_SPECIAL makes a bareword first arg
2494# be a filehandle. This could probably be better fixed in the core
2495# by moving the GV lookup into ck_truc.
2496
2497sub pp_truncate {
2498 my $self = shift;
2499 my($op, $cx) = @_;
2500 my(@exprs);
2501 my $parens = ($cx >= 5) || $self->{'parens'};
2502 my $kid = $op->first->sibling;
acba1d67 2503 my $fh;
f5aa8f4e
SM
2504 if ($op->flags & OPf_SPECIAL) {
2505 # $kid is an OP_CONST
18228111 2506 $fh = $self->const_sv($kid)->PV;
f5aa8f4e
SM
2507 } else {
2508 $fh = $self->deparse($kid, 6);
2509 $fh = "+$fh" if not $parens and substr($fh, 0, 1) eq "(";
2510 }
2511 my $len = $self->deparse($kid->sibling, 6);
4a1ac32e 2512 my $name = $self->keyword('truncate');
f5aa8f4e 2513 if ($parens) {
4a1ac32e 2514 return "$name($fh, $len)";
f5aa8f4e 2515 } else {
4a1ac32e 2516 return "$name $fh, $len";
f5aa8f4e 2517 }
f5aa8f4e
SM
2518}
2519
6e90668e
SM
2520sub indirop {
2521 my $self = shift;
9d2c6865 2522 my($op, $cx, $name) = @_;
6e90668e 2523 my($expr, @exprs);
521795fe 2524 my $firstkid = my $kid = $op->first->sibling;
6e90668e
SM
2525 my $indir = "";
2526 if ($op->flags & OPf_STACKED) {
2527 $indir = $kid;
2528 $indir = $indir->first; # skip rv2gv
2529 if (is_scope($indir)) {
9d2c6865 2530 $indir = "{" . $self->deparse($indir, 0) . "}";
d989cdac 2531 $indir = "{;}" if $indir eq "{}";
c73811ab
RH
2532 } elsif ($indir->name eq "const" && $indir->private & OPpCONST_BARE) {
2533 $indir = $self->const_sv($indir)->PV;
6e90668e 2534 } else {
9d2c6865 2535 $indir = $self->deparse($indir, 24);
6e90668e
SM
2536 }
2537 $indir = $indir . " ";
2538 $kid = $kid->sibling;
2539 }
7e80da18 2540 if ($name eq "sort" && $op->private & (OPpSORT_NUMERIC | OPpSORT_INTEGER)) {
3ac6e0f9 2541 $indir = ($op->private & OPpSORT_DESCEND) ? '{$b <=> $a} '
7e80da18
RH
2542 : '{$a <=> $b} ';
2543 }
3ac6e0f9 2544 elsif ($name eq "sort" && $op->private & OPpSORT_DESCEND) {
7e80da18
RH
2545 $indir = '{$b cmp $a} ';
2546 }
6e90668e 2547 for (; !null($kid); $kid = $kid->sibling) {
521795fe 2548 $expr = $self->deparse($kid, !$indir && $kid == $firstkid && $name eq "sort" && $firstkid->name eq "entersub" ? 16 : 6);
6e90668e
SM
2549 push @exprs, $expr;
2550 }
4a1ac32e 2551 my $name2;
3ac6e0f9 2552 if ($name eq "sort" && $op->private & OPpSORT_REVERSE) {
4a1ac32e 2553 $name2 = $self->keyword('reverse') . ' ' . $self->keyword('sort');
3ac6e0f9 2554 }
4a1ac32e 2555 else { $name2 = $self->keyword($name) }
2b6e98cb 2556 if ($name eq "sort" && ($op->private & OPpSORT_INPLACE)) {
3ac6e0f9 2557 return "$exprs[0] = $name2 $indir $exprs[0]";
2b6e98cb
DM
2558 }
2559
d989cdac 2560 my $args = $indir . join(", ", @exprs);
521795fe 2561 if ($indir ne "" && $name eq "sort") {
d989cdac
SM
2562 # We don't want to say "sort(f 1, 2, 3)", since perl -w will
2563 # give bareword warnings in that case. Therefore if context
2564 # requires, we'll put parens around the outside "(sort f 1, 2,
2565 # 3)". Unfortunately, we'll currently think the parens are
3c4b39be 2566 # necessary more often that they really are, because we don't
d989cdac
SM
2567 # distinguish which side of an assignment we're on.
2568 if ($cx >= 5) {
3ac6e0f9 2569 return "($name2 $args)";
d989cdac 2570 } else {
3ac6e0f9 2571 return "$name2 $args";
d989cdac 2572 }
521795fe
FC
2573 } elsif (
2574 !$indir && $name eq "sort"
2575 && $op->first->sibling->name eq 'entersub'
2576 ) {
2577 # We cannot say sort foo(bar), as foo will be interpreted as a
2578 # comparison routine. We have to say sort(...) in that case.
2579 return "$name2($args)";
d989cdac 2580 } else {
3ac6e0f9 2581 return $self->maybe_parens_func($name2, $args, $cx, 5);
d989cdac
SM
2582 }
2583
6e90668e
SM
2584}
2585
2586sub pp_prtf { indirop(@_, "printf") }
2587sub pp_print { indirop(@_, "print") }
9b08e3d3 2588sub pp_say { indirop(@_, "say") }
6e90668e
SM
2589sub pp_sort { indirop(@_, "sort") }
2590
2591sub mapop {
2592 my $self = shift;
9d2c6865 2593 my($op, $cx, $name) = @_;
6e90668e
SM
2594 my($expr, @exprs);
2595 my $kid = $op->first; # this is the (map|grep)start
2596 $kid = $kid->first->sibling; # skip a pushmark
2597 my $code = $kid->first; # skip a null
2598 if (is_scope $code) {
f4a44678 2599 $code = "{" . $self->deparse($code, 0) . "} ";
6e90668e 2600 } else {
9d2c6865 2601 $code = $self->deparse($code, 24) . ", ";
6e90668e
SM
2602 }
2603 $kid = $kid->sibling;
2604 for (; !null($kid); $kid = $kid->sibling) {
9d2c6865 2605 $expr = $self->deparse($kid, 6);
9a58b761 2606 push @exprs, $expr if defined $expr;
6e90668e 2607 }
9d2c6865 2608 return $self->maybe_parens_func($name, $code . join(", ", @exprs), $cx, 5);
6e90668e
SM
2609}
2610
d989cdac
SM
2611sub pp_mapwhile { mapop(@_, "map") }
2612sub pp_grepwhile { mapop(@_, "grep") }
11e09183
SP
2613sub pp_mapstart { baseop(@_, "map") }
2614sub pp_grepstart { baseop(@_, "grep") }
6e90668e
SM
2615
2616sub pp_list {
2617 my $self = shift;
9d2c6865 2618 my($op, $cx) = @_;
6e90668e
SM
2619 my($expr, @exprs);
2620 my $kid = $op->first->sibling; # skip pushmark
958ed56b 2621 return '' if class($kid) eq 'NULL';
6e90668e 2622 my $lop;
3462b4ac 2623 my $local = "either"; # could be local(...), my(...), state(...) or our(...)
6e90668e
SM
2624 for ($lop = $kid; !null($lop); $lop = $lop->sibling) {
2625 # This assumes that no other private flags equal 128, and that
2626 # OPs that store things other than flags in their op_private,
2627 # like OP_AELEMFAST, won't be immediate children of a list.
b8e103fc
RH
2628 #
2629 # OP_ENTERSUB can break this logic, so check for it.
2630 # I suspect that open and exit can too.
2631
2632 if (!($lop->private & (OPpLVAL_INTRO|OPpOUR_INTRO)
ce4e655d 2633 or $lop->name eq "undef")
b8e103fc
RH
2634 or $lop->name eq "entersub"
2635 or $lop->name eq "exit"
2636 or $lop->name eq "open")
6e90668e
SM
2637 {
2638 $local = ""; # or not
2639 last;
2640 }
3462b4ac
RGS
2641 if ($lop->name =~ /^pad[ash]v$/) {
2642 if ($lop->private & OPpPAD_STATE) { # state()
2643 ($local = "", last) if $local =~ /^(?:local|our|my)$/;
2644 $local = "state";
2645 } else { # my()
2646 ($local = "", last) if $local =~ /^(?:local|our|state)$/;
2647 $local = "my";
2648 }
b8e103fc
RH
2649 } elsif ($lop->name =~ /^(gv|rv2)[ash]v$/
2650 && $lop->private & OPpOUR_INTRO
2651 or $lop->name eq "null" && $lop->first->name eq "gvsv"
2652 && $lop->first->private & OPpOUR_INTRO) { # our()
3462b4ac 2653 ($local = "", last) if $local =~ /^(?:my|local|state)$/;
ce4e655d 2654 $local = "our";
3ac6e0f9
RGS
2655 } elsif ($lop->name ne "undef"
2656 # specifically avoid the "reverse sort" optimisation,
2657 # where "reverse" is nullified
36d57d93 2658 && !($lop->name eq 'sort' && ($lop->flags & OPpSORT_REVERSE)))
3ac6e0f9
RGS
2659 {
2660 # local()
3462b4ac 2661 ($local = "", last) if $local =~ /^(?:my|our|state)$/;
6e90668e
SM
2662 $local = "local";
2663 }
2664 }
2665 $local = "" if $local eq "either"; # no point if it's all undefs
f5aa8f4e 2666 return $self->deparse($kid, $cx) if null $kid->sibling and not $local;
6e90668e
SM
2667 for (; !null($kid); $kid = $kid->sibling) {
2668 if ($local) {
3f872cb9 2669 if (class($kid) eq "UNOP" and $kid->first->name eq "gvsv") {
6e90668e
SM
2670 $lop = $kid->first;
2671 } else {
2672 $lop = $kid;
2673 }
2674 $self->{'avoid_local'}{$$lop}++;
9d2c6865 2675 $expr = $self->deparse($kid, 6);
6e90668e
SM
2676 delete $self->{'avoid_local'}{$$lop};
2677 } else {
9d2c6865 2678 $expr = $self->deparse($kid, 6);
6e90668e
SM
2679 }
2680 push @exprs, $expr;
2681 }
9d2c6865
SM
2682 if ($local) {
2683 return "$local(" . join(", ", @exprs) . ")";
2684 } else {
2685 return $self->maybe_parens( join(", ", @exprs), $cx, 6);
2686 }
6e90668e
SM
2687}
2688
6f611a1a
GS
2689sub is_ifelse_cont {
2690 my $op = shift;
2691 return ($op->name eq "null" and class($op) eq "UNOP"
2692 and $op->first->name =~ /^(and|cond_expr)$/
2693 and is_scope($op->first->first->sibling));
2694}
2695
6e90668e
SM
2696sub pp_cond_expr {
2697 my $self = shift;
9d2c6865 2698 my($op, $cx) = @_;
6e90668e
SM
2699 my $cond = $op->first;
2700 my $true = $cond->sibling;
2701 my $false = $true->sibling;
9d2c6865 2702 my $cuddle = $self->{'cuddle'};
d989cdac 2703 unless ($cx < 1 and (is_scope($true) and $true->name ne "null") and
58cccf98
SM
2704 (is_scope($false) || is_ifelse_cont($false))
2705 and $self->{'expand'} < 7) {
f5aa8f4e 2706 $cond = $self->deparse($cond, 8);
cfaba469 2707 $true = $self->deparse($true, 6);
9d2c6865
SM
2708 $false = $self->deparse($false, 8);
2709 return $self->maybe_parens("$cond ? $true : $false", $cx, 8);
6f611a1a
GS
2710 }
2711
f5aa8f4e 2712 $cond = $self->deparse($cond, 1);
d989cdac 2713 $true = $self->deparse($true, 0);
6f611a1a
GS
2714 my $head = "if ($cond) {\n\t$true\n\b}";
2715 my @elsifs;
2716 while (!null($false) and is_ifelse_cont($false)) {
2717 my $newop = $false->first;
2718 my $newcond = $newop->first;
2719 my $newtrue = $newcond->sibling;
2720 $false = $newtrue->sibling; # last in chain is OP_AND => no else
7ecdd211
PJ
2721 if ($newcond->name eq "lineseq")
2722 {
2723 # lineseq to ensure correct line numbers in elsif()
2724 # Bug #37302 fixed by change #33710.
2725 $newcond = $newcond->first->sibling;
2726 }
6f611a1a
GS
2727 $newcond = $self->deparse($newcond, 1);
2728 $newtrue = $self->deparse($newtrue, 0);
2729 push @elsifs, "elsif ($newcond) {\n\t$newtrue\n\b}";
2730 }
d989cdac 2731 if (!null($false)) {
6f611a1a
GS
2732 $false = $cuddle . "else {\n\t" .
2733 $self->deparse($false, 0) . "\n\b}\cK";
2734 } else {
2735 $false = "\cK";
6e90668e 2736 }
d989cdac 2737 return $head . join($cuddle, "", @elsifs) . $false;
6e90668e
SM
2738}
2739
95562366
NC
2740sub pp_once {
2741 my ($self, $op, $cx) = @_;
2742 my $cond = $op->first;
2743 my $true = $cond->sibling;
2744
2745 return $self->deparse($true, $cx);
2746}
2747
58cccf98 2748sub loop_common {
6e90668e 2749 my $self = shift;
58cccf98 2750 my($op, $cx, $init) = @_;
6e90668e
SM
2751 my $enter = $op->first;
2752 my $kid = $enter->sibling;
0ced6c29
RGS
2753 local(@$self{qw'curstash warnings hints hinthash'})
2754 = @$self{qw'curstash warnings hints hinthash'};
6e90668e 2755 my $head = "";
9d2c6865 2756 my $bare = 0;
58cccf98
SM
2757 my $body;
2758 my $cond = undef;
d989cdac 2759 if ($kid->name eq "lineseq") { # bare or infinite loop
241416b8 2760 if ($kid->last->name eq "unstack") { # infinite
e99ebc55 2761 $head = "while (1) "; # Can't use for(;;) if there's a continue
58cccf98 2762 $cond = "";
9d2c6865
SM
2763 } else {
2764 $bare = 1;
6e90668e 2765 }
58cccf98 2766 $body = $kid;
3f872cb9 2767 } elsif ($enter->name eq "enteriter") { # foreach
6e90668e
SM
2768 my $ary = $enter->first->sibling; # first was pushmark
2769 my $var = $ary->sibling;
36d57d93
RGS
2770 if ($ary->name eq 'null' and $enter->private & OPpITER_REVERSED) {
2771 # "reverse" was optimised away
aae53c41 2772 $ary = listop($self, $ary->first->sibling, 1, 'reverse');
36d57d93 2773 } elsif ($enter->flags & OPf_STACKED
f5aa8f4e
SM
2774 and not null $ary->first->sibling->sibling)
2775 {
d7f5b6da
SM
2776 $ary = $self->deparse($ary->first->sibling, 9) . " .. " .
2777 $self->deparse($ary->first->sibling->sibling, 9);
d8d95777
GA
2778 } else {
2779 $ary = $self->deparse($ary, 1);
2780 }
6e90668e 2781 if (null $var) {
823eff14
NC
2782 if (($enter->flags & OPf_SPECIAL) && ($] < 5.009)) {
2783 # thread special var, under 5005threads
9d2c6865 2784 $var = $self->pp_threadsv($enter, 1);
f6f9bdb7 2785 } else { # regular my() variable
9d2c6865 2786 $var = $self->pp_padsv($enter, 1);
6e90668e 2787 }
3f872cb9 2788 } elsif ($var->name eq "rv2gv") {
9d2c6865 2789 $var = $self->pp_rv2sv($var, 1);
241416b8
DM
2790 if ($enter->private & OPpOUR_INTRO) {
2791 # our declarations don't have package names
2792 $var =~ s/^(.).*::/$1/;
2793 $var = "our $var";
2794 }
3f872cb9 2795 } elsif ($var->name eq "gv") {
9d2c6865 2796 $var = "\$" . $self->deparse($var, 1);
6e90668e 2797 }
58cccf98 2798 $body = $kid->first->first->sibling; # skip OP_AND and OP_ITER
cf24a840
SM
2799 if (!is_state $body->first and $body->first->name ne "stub") {
2800 confess unless $var eq '$_';
2801 $body = $body->first;
2802 return $self->deparse($body, 2) . " foreach ($ary)";
2803 }
2804 $head = "foreach $var ($ary) ";
3f872cb9 2805 } elsif ($kid->name eq "null") { # while/until
6e90668e 2806 $kid = $kid->first;
58cccf98
SM
2807 my $name = {"and" => "while", "or" => "until"}->{$kid->name};
2808 $cond = $self->deparse($kid->first, 1);
2809 $head = "$name ($cond) ";
2810 $body = $kid->first->sibling;
3f872cb9 2811 } elsif ($kid->name eq "stub") { # bare and empty
9d2c6865 2812 return "{;}"; # {} could be a hashref
6e90668e 2813 }
58cccf98 2814 # If there isn't a continue block, then the next pointer for the loop
241416b8 2815 # will point to the unstack, which is kid's last child, except
58cccf98 2816 # in a bare loop, when it will point to the leaveloop. When neither of
241416b8 2817 # these conditions hold, then the second-to-last child is the continue
58cccf98
SM
2818 # block (or the last in a bare loop).
2819 my $cont_start = $enter->nextop;
2820 my $cont;
241416b8 2821 if ($$cont_start != $$op && ${$cont_start} != ${$body->last}) {
58cccf98
SM
2822 if ($bare) {
2823 $cont = $body->last;
2824 } else {
2825 $cont = $body->first;
241416b8 2826 while (!null($cont->sibling->sibling)) {
58cccf98
SM
2827 $cont = $cont->sibling;
2828 }
2829 }
2830 my $state = $body->first;
2831 my $cuddle = $self->{'cuddle'};
2832 my @states;
2833 for (; $$state != $$cont; $state = $state->sibling) {
2834 push @states, $state;
2835 }
ce4e655d 2836 $body = $self->lineseq(undef, @states);
58cccf98
SM
2837 if (defined $cond and not is_scope $cont and $self->{'expand'} < 3) {
2838 $head = "for ($init; $cond; " . $self->deparse($cont, 1) .") ";
2839 $cont = "\cK";
2840 } else {
2841 $cont = $cuddle . "continue {\n\t" .
2842 $self->deparse($cont, 0) . "\n\b}\cK";
6e90668e 2843 }
6e90668e 2844 } else {
7a9b44b9 2845 return "" if !defined $body;
c73811ab
RH
2846 if (length $init) {
2847 $head = "for ($init; $cond;) ";
2848 }
9d2c6865 2849 $cont = "\cK";
58cccf98 2850 $body = $self->deparse($body, 0);
6e90668e 2851 }
ce4e655d 2852 $body =~ s/;?$/;\n/;
34a48b4b
RH
2853
2854 return $head . "{\n\t" . $body . "\b}" . $cont;
58cccf98
SM
2855}
2856
09d856fb 2857sub pp_leaveloop { shift->loop_common(@_, "") }
58cccf98
SM
2858
2859sub for_loop {
2860 my $self = shift;
2861 my($op, $cx) = @_;
2862 my $init = $self->deparse($op, 1);
eae48c89
Z
2863 my $s = $op->sibling;
2864 my $ll = $s->name eq "unstack" ? $s->sibling : $s->first->sibling;
2865 return $self->loop_common($ll, $cx, $init);
6e90668e
SM
2866}
2867
2868sub pp_leavetry {
2869 my $self = shift;
9d2c6865 2870 return "eval {\n\t" . $self->pp_leave(@_) . "\n\b}";
bd0865ec 2871}
6e90668e 2872
a3ba843f
FC
2873BEGIN { for (qw[ const stringify rv2sv list glob ]) {
2874 eval "sub OP_\U$_ () { " . opnumber($_) . "}"
2875}}
f5aa8f4e 2876
a798dbf2 2877sub pp_null {
6e90668e 2878 my $self = shift;
d989cdac 2879 my($op, $cx) = @_;
6e90668e 2880 if (class($op) eq "OP") {
f4a44678
SM
2881 # old value is lost
2882 return $self->{'ex_const'} if $op->targ == OP_CONST;
3f872cb9 2883 } elsif ($op->first->name eq "pushmark") {
9d2c6865 2884 return $self->pp_list($op, $cx);
3f872cb9 2885 } elsif ($op->first->name eq "enter") {
9d2c6865 2886 return $self->pp_leave($op, $cx);
31c6271a
RD
2887 } elsif ($op->first->name eq "leave") {
2888 return $self->pp_leave($op->first, $cx);
2889 } elsif ($op->first->name eq "scope") {
2890 return $self->pp_scope($op->first, $cx);
bd0865ec 2891 } elsif ($op->targ == OP_STRINGIFY) {
6f611a1a 2892 return $self->dquote($op, $cx);
f4002a4b
FC
2893 } elsif ($op->targ == OP_GLOB) {
2894 return $self->pp_glob(
2895 $op->first # entersub
2896 ->first # ex-list
2897 ->first # pushmark
2898 ->sibling, # glob
2899 $cx
2900 );
6e90668e 2901 } elsif (!null($op->first->sibling) and
3f872cb9 2902 $op->first->sibling->name eq "readline" and
6e90668e 2903 $op->first->sibling->flags & OPf_STACKED) {
9d2c6865
SM
2904 return $self->maybe_parens($self->deparse($op->first, 7) . " = "
2905 . $self->deparse($op->first->sibling, 7),
2906 $cx, 7);
6e90668e 2907 } elsif (!null($op->first->sibling) and
3f872cb9 2908 $op->first->sibling->name eq "trans" and
6e90668e 2909 $op->first->sibling->flags & OPf_STACKED) {
9d2c6865
SM
2910 return $self->maybe_parens($self->deparse($op->first, 20) . " =~ "
2911 . $self->deparse($op->first->sibling, 20),
2912 $cx, 20);
d989cdac
SM
2913 } elsif ($op->flags & OPf_SPECIAL && $cx < 1 && !$op->targ) {
2914 return "do {\n\t". $self->deparse($op->first, $cx) ."\n\b};";
ad8caead
RGS
2915 } elsif (!null($op->first->sibling) and
2916 $op->first->sibling->name eq "null" and
2917 class($op->first->sibling) eq "UNOP" and
2918 $op->first->sibling->first->flags & OPf_STACKED and
2919 $op->first->sibling->first->name eq "rcatline") {
2920 return $self->maybe_parens($self->deparse($op->first, 18) . " .= "
2921 . $self->deparse($op->first->sibling, 18),
2922 $cx, 18);
6e90668e 2923 } else {
9d2c6865 2924 return $self->deparse($op->first, $cx);
6e90668e 2925 }
a798dbf2
MB
2926}
2927
6e90668e
SM
2928sub padname {
2929 my $self = shift;
2930 my $targ = shift;
68223ea3 2931 return $self->padname_sv($targ)->PVX;
6e90668e
SM
2932}
2933
2934sub padany {
2935 my $self = shift;
2936 my $op = shift;
2937 return substr($self->padname($op->targ), 1); # skip $/@/%
2938}
2939
2940sub pp_padsv {
2941 my $self = shift;
9d2c6865
SM
2942 my($op, $cx) = @_;
2943 return $self->maybe_my($op, $cx, $self->padname($op->targ));
6e90668e
SM
2944}
2945
2946sub pp_padav { pp_padsv(@_) }
2947sub pp_padhv { pp_padsv(@_) }
2948
e0ab66ad 2949my @threadsv_names = B::threadsv_names;
f6f9bdb7
SM
2950sub pp_threadsv {
2951 my $self = shift;
9d2c6865
SM
2952 my($op, $cx) = @_;
2953 return $self->maybe_local($op, $cx, "\$" . $threadsv_names[$op->targ]);
d989cdac 2954}
f6f9bdb7 2955
6f611a1a 2956sub gv_or_padgv {
18228111
GS
2957 my $self = shift;
2958 my $op = shift;
6f611a1a
GS
2959 if (class($op) eq "PADOP") {
2960 return $self->padval($op->padix);
2961 } else { # class($op) eq "SVOP"
2962 return $op->gv;
18228111 2963 }
18228111
GS
2964}
2965
6e90668e
SM
2966sub pp_gvsv {
2967 my $self = shift;
9d2c6865 2968 my($op, $cx) = @_;
6f611a1a 2969 my $gv = $self->gv_or_padgv($op);
8510e997 2970 return $self->maybe_local($op, $cx, $self->stash_variable("\$",
bb8996b8 2971 $self->gv_name($gv), $cx));
6e90668e
SM
2972}
2973
2974sub pp_gv {
2975 my $self = shift;
9d2c6865 2976 my($op, $cx) = @_;
6f611a1a 2977 my $gv = $self->gv_or_padgv($op);
18228111 2978 return $self->gv_name($gv);
6e90668e
SM
2979}
2980
93bad3fd
NC
2981sub pp_aelemfast_lex {
2982 my $self = shift;
2983 my($op, $cx) = @_;
2984 my $name = $self->padname($op->targ);
2985 $name =~ s/^@/\$/;
bc6b2ef6 2986 return $name . "[" . ($op->private + $self->{'arybase'}) . "]";
93bad3fd
NC
2987}
2988
6e90668e
SM
2989sub pp_aelemfast {
2990 my $self = shift;
9d2c6865 2991 my($op, $cx) = @_;
93bad3fd
NC
2992 # optimised PADAV, pre 5.15
2993 return $self->pp_aelemfast_lex(@_) if ($op->flags & OPf_SPECIAL);
ce4e655d 2994
93bad3fd
NC
2995 my $gv = $self->gv_or_padgv($op);
2996 my $name = $self->gv_name($gv);
2997 $name = $self->{'curstash'}."::$name"
2998 if $name !~ /::/ && $self->lex_in_scope('@'.$name);
2999 $name = '$' . $name;
bc6b2ef6 3000 return $name . "[" . ($op->private + $self->{'arybase'}) . "]";
6e90668e
SM
3001}
3002
3003sub rv2x {
3004 my $self = shift;
9d2c6865 3005 my($op, $cx, $type) = @_;
90c0eb26
RH
3006
3007 if (class($op) eq 'NULL' || !$op->can("first")) {
ff97752d 3008 carp("Unexpected op in pp_rv2x");
90c0eb26
RH
3009 return 'XXX';
3010 }
6e90668e 3011 my $kid = $op->first;
d989cdac 3012 if ($kid->name eq "gv") {
bb8996b8 3013 return $self->stash_variable($type, $self->deparse($kid, 0), $cx);
d989cdac
SM
3014 } elsif (is_scalar $kid) {
3015 my $str = $self->deparse($kid, 0);
3016 if ($str =~ /^\$([^\w\d])\z/) {
3017 # "$$+" isn't a legal way to write the scalar dereference
3018 # of $+, since the lexer can't tell you aren't trying to
3019 # do something like "$$ + 1" to get one more than your
3020 # PID. Either "${$+}" or "$${+}" are workable
3021 # disambiguations, but if the programmer did the former,
3022 # they'd be in the "else" clause below rather than here.
3023 # It's not clear if this should somehow be unified with
3024 # the code in dq and re_dq that also adds lexer
3025 # disambiguation braces.
3026 $str = '$' . "{$1}"; #'
3027 }
3028 return $type . $str;
3029 } else {
3030 return $type . "{" . $self->deparse($kid, 0) . "}";
3031 }
6e90668e
SM
3032}
3033
3034sub pp_rv2sv { maybe_local(@_, rv2x(@_, "\$")) }
3035sub pp_rv2hv { maybe_local(@_, rv2x(@_, "%")) }
3036sub pp_rv2gv { maybe_local(@_, rv2x(@_, "*")) }
3037
3038# skip rv2av
3039sub pp_av2arylen {
3040 my $self = shift;
9d2c6865 3041 my($op, $cx) = @_;
3f872cb9 3042 if ($op->first->name eq "padav") {
9d2c6865 3043 return $self->maybe_local($op, $cx, '$#' . $self->padany($op->first));
6e90668e 3044 } else {
f5aa8f4e
SM
3045 return $self->maybe_local($op, $cx,
3046 $self->rv2x($op->first, $cx, '$#'));
6e90668e
SM
3047 }
3048}
3049
3050# skip down to the old, ex-rv2cv
90c0eb26
RH
3051sub pp_rv2cv {
3052 my ($self, $op, $cx) = @_;
3053 if (!null($op->first) && $op->first->name eq 'null' &&
3054 $op->first->targ eq OP_LIST)
3055 {
3056 return $self->rv2x($op->first->first->sibling, $cx, "&")
3057 }
3058 else {
3059 return $self->rv2x($op, $cx, "")
3060 }
3061}
6e90668e 3062
d989cdac
SM
3063sub list_const {
3064 my $self = shift;
3065 my($cx, @list) = @_;
3066 my @a = map $self->const($_, 6), @list;
3067 if (@a == 0) {
3068 return "()";
3069 } elsif (@a == 1) {
3070 return $a[0];
3071 } elsif ( @a > 2 and !grep(!/^-?\d+$/, @a)) {
3072 # collapse (-1,0,1,2) into (-1..2)
3073 my ($s, $e) = @a[0,-1];
3074 my $i = $s;
3075 return $self->maybe_parens("$s..$e", $cx, 9)
3076 unless grep $i++ != $_, @a;
3077 }
3078 return $self->maybe_parens(join(", ", @a), $cx, 6);
3079}
3080
6e90668e
SM
3081sub pp_rv2av {
3082 my $self = shift;
9d2c6865 3083 my($op, $cx) = @_;
6e90668e 3084 my $kid = $op->first;
3f872cb9 3085 if ($kid->name eq "const") { # constant list
18228111 3086 my $av = $self->const_sv($kid);
d989cdac 3087 return $self->list_const($cx, $av->ARRAY);
6e90668e 3088 } else {
9d2c6865 3089 return $self->maybe_local($op, $cx, $self->rv2x($op, $cx, "\@"));
6e90668e
SM
3090 }
3091 }
3092
3ed82cfc
GS
3093sub is_subscriptable {
3094 my $op = shift;
3095 if ($op->name =~ /^[ahg]elem/) {
3096 return 1;
3097 } elsif ($op->name eq "entersub") {
3098 my $kid = $op->first;
3099 return 0 unless null $kid->sibling;
3100 $kid = $kid->first;
3101 $kid = $kid->sibling until null $kid->sibling;
3102 return 0 if is_scope($kid);
3103 $kid = $kid->first;
3104 return 0 if $kid->name eq "gv";
3105 return 0 if is_scalar($kid);
3106 return is_subscriptable($kid);
3107 } else {
3108 return 0;
3109 }
3110}
6e90668e 3111
21b7468a
BL
3112sub elem_or_slice_array_name
3113{
6e90668e 3114 my $self = shift;
21b7468a
BL
3115 my ($array, $left, $padname, $allow_arrow) = @_;
3116
3f872cb9 3117 if ($array->name eq $padname) {
21b7468a 3118 return $self->padany($array);
6e90668e 3119 } elsif (is_scope($array)) { # ${expr}[0]
21b7468a 3120 return "{" . $self->deparse($array, 0) . "}";
ce4e655d
RH
3121 } elsif ($array->name eq "gv") {
3122 $array = $self->gv_name($self->gv_or_padgv($array));
3123 if ($array !~ /::/) {
3124 my $prefix = ($left eq '[' ? '@' : '%');
3125 $array = $self->{curstash}.'::'.$array
3126 if $self->lex_in_scope($prefix . $array);
3127 }
21b7468a
BL
3128 return $array;
3129 } elsif (!$allow_arrow || is_scalar $array) { # $x[0], $$x[0], ...
3130 return $self->deparse($array, 24);
6e90668e 3131 } else {
21b7468a 3132 return undef;
6e90668e 3133 }
21b7468a
BL
3134}
3135
3136sub elem_or_slice_single_index
3137{
3138 my $self = shift;
3139 my ($idx) = @_;
3140
9d2c6865 3141 $idx = $self->deparse($idx, 1);
7a9b44b9
RH
3142
3143 # Outer parens in an array index will confuse perl
3144 # if we're interpolating in a regular expression, i.e.
3145 # /$x$foo[(-1)]/ is *not* the same as /$x$foo[-1]/
3146 #
3147 # If $self->{parens}, then an initial '(' will
3148 # definitely be paired with a final ')'. If
3149 # !$self->{parens}, the misleading parens won't
3150 # have been added in the first place.
3151 #
3152 # [You might think that we could get "(...)...(...)"
3153 # where the initial and final parens do not match
3154 # each other. But we can't, because the above would
3155 # only happen if there's an infix binop between the
3156 # two pairs of parens, and *that* means that the whole
3157 # expression would be parenthesized as well.]
3158 #
3159 $idx =~ s/^\((.*)\)$/$1/ if $self->{'parens'};
3160
098251bc
RH
3161 # Hash-element braces will autoquote a bareword inside themselves.
3162 # We need to make sure that C<$hash{warn()}> doesn't come out as
3163 # C<$hash{warn}>, which has a quite different meaning. Currently
3164 # B::Deparse will always quote strings, even if the string was a
3165 # bareword in the original (i.e. the OPpCONST_BARE flag is ignored
3166 # for constant strings.) So we can cheat slightly here - if we see
3167 # a bareword, we know that it is supposed to be a function call.
3168 #
3169 $idx =~ s/^([A-Za-z_]\w*)$/$1()/;
3170
21b7468a
BL
3171 return $idx;
3172}
3173
3174sub elem {
3175 my $self = shift;
3176 my ($op, $cx, $left, $right, $padname) = @_;
3177 my($array, $idx) = ($op->first, $op->first->sibling);
3178
3179 $idx = $self->elem_or_slice_single_index($idx);
3180
3181 unless ($array->name eq $padname) { # Maybe this has been fixed
3182 $array = $array->first; # skip rv2av (or ex-rv2av in _53+)
3183 }
3184 if (my $array_name=$self->elem_or_slice_array_name
3185 ($array, $left, $padname, 1)) {
3186 return "\$" . $array_name . $left . $idx . $right;
3187 } else {
3188 # $x[20][3]{hi} or expr->[20]
3189 my $arrow = is_subscriptable($array) ? "" : "->";
3190 return $self->deparse($array, 24) . $arrow . $left . $idx . $right;
3191 }
3192
6e90668e
SM
3193}
3194
3f872cb9
GS
3195sub pp_aelem { maybe_local(@_, elem(@_, "[", "]", "padav")) }
3196sub pp_helem { maybe_local(@_, elem(@_, "{", "}", "padhv")) }
6e90668e
SM
3197
3198sub pp_gelem {
3199 my $self = shift;
9d2c6865 3200 my($op, $cx) = @_;
6e90668e
SM
3201 my($glob, $part) = ($op->first, $op->last);
3202 $glob = $glob->first; # skip rv2gv
3f872cb9 3203 $glob = $glob->first if $glob->name eq "rv2gv"; # this one's a bug
9d2c6865
SM
3204 my $scope = is_scope($glob);
3205 $glob = $self->deparse($glob, 0);
3206 $part = $self->deparse($part, 1);
6e90668e
SM
3207 return "*" . ($scope ? "{$glob}" : $glob) . "{$part}";
3208}
3209
3210sub slice {
3211 my $self = shift;
9d2c6865 3212 my ($op, $cx, $left, $right, $regname, $padname) = @_;
6e90668e
SM
3213 my $last;
3214 my(@elems, $kid, $array, $list);
3215 if (class($op) eq "LISTOP") {
3216 $last = $op->last;
3217 } else { # ex-hslice inside delete()
3218 for ($kid = $op->first; !null $kid->sibling; $kid = $kid->sibling) {}
3219 $last = $kid;
3220 }
3221 $array = $last;
3222 $array = $array->first
3f872cb9 3223 if $array->name eq $regname or $array->name eq "null";
21b7468a 3224 $array = $self->elem_or_slice_array_name($array,$left,$padname,0);
6e90668e 3225 $kid = $op->first->sibling; # skip pushmark
3f872cb9 3226 if ($kid->name eq "list") {
6e90668e
SM
3227 $kid = $kid->first->sibling; # skip list, pushmark
3228 for (; !null $kid; $kid = $kid->sibling) {
9d2c6865 3229 push @elems, $self->deparse($kid, 6);
6e90668e
SM
3230 }
3231 $list = join(", ", @elems);
3232 } else {
21b7468a 3233 $list = $self->elem_or_slice_single_index($kid);
6e90668e
SM
3234 }
3235 return "\@" . $array . $left . $list . $right;
3236}
3237
3ed82cfc
GS
3238sub pp_aslice { maybe_local(@_, slice(@_, "[", "]", "rv2av", "padav")) }
3239sub pp_hslice { maybe_local(@_, slice(@_, "{", "}", "rv2hv", "padhv")) }
6e90668e
SM
3240
3241sub pp_lslice {
3242 my $self = shift;
9d2c6865 3243 my($op, $cx) = @_;
6e90668e
SM
3244 my $idx = $op->first;
3245 my $list = $op->last;
3246 my(@elems, $kid);
9d2c6865
SM
3247 $list = $self->deparse($list, 1);
3248 $idx = $self->deparse($idx, 1);
3249 return "($list)" . "[$idx]";
6e90668e
SM
3250}
3251
6e90668e
SM
3252sub want_scalar {
3253 my $op = shift;
3254 return ($op->flags & OPf_WANT) == OPf_WANT_SCALAR;
3255}
3256
bd0865ec
GS
3257sub want_list {
3258 my $op = shift;
3259 return ($op->flags & OPf_WANT) == OPf_WANT_LIST;
3260}
3261
09d856fb 3262sub _method {
6e90668e 3263 my $self = shift;
9d2c6865 3264 my($op, $cx) = @_;
bd0865ec
GS
3265 my $kid = $op->first->sibling; # skip pushmark
3266 my($meth, $obj, @exprs);
3f872cb9 3267 if ($kid->name eq "list" and want_list $kid) {
bd0865ec
GS
3268 # When an indirect object isn't a bareword but the args are in
3269 # parens, the parens aren't part of the method syntax (the LLAFR
3270 # doesn't apply), but they make a list with OPf_PARENS set that
3271 # doesn't get flattened by the append_elem that adds the method,
3272 # making a (object, arg1, arg2, ...) list where the object
d989cdac 3273 # usually is. This can be distinguished from
e38ccfd9 3274 # '($obj, $arg1, $arg2)->meth()' (which is legal if $arg2 is an
bd0865ec
GS
3275 # object) because in the later the list is in scalar context
3276 # as the left side of -> always is, while in the former
3277 # the list is in list context as method arguments always are.
3278 # (Good thing there aren't method prototypes!)
3ed82cfc 3279 $meth = $kid->sibling;
bd0865ec
GS
3280 $kid = $kid->first->sibling; # skip pushmark
3281 $obj = $kid;
6e90668e 3282 $kid = $kid->sibling;
bd0865ec 3283 for (; not null $kid; $kid = $kid->sibling) {
09d856fb 3284 push @exprs, $kid;
6e90668e 3285 }
bd0865ec
GS
3286 } else {
3287 $obj = $kid;
3288 $kid = $kid->sibling;
35a99a08 3289 for (; !null ($kid->sibling) && $kid->name!~/^method(?:_named)?\z/;
90c0eb26 3290 $kid = $kid->sibling) {
09d856fb 3291 push @exprs, $kid
6e90668e 3292 }
3ed82cfc 3293 $meth = $kid;
bd0865ec 3294 }
09d856fb 3295
3ed82cfc 3296 if ($meth->name eq "method_named") {
18228111 3297 $meth = $self->const_sv($meth)->PV;
bd0865ec 3298 } else {
3ed82cfc
GS
3299 $meth = $meth->first;
3300 if ($meth->name eq "const") {
3301 # As of 5.005_58, this case is probably obsoleted by the
3302 # method_named case above
18228111 3303 $meth = $self->const_sv($meth)->PV; # needs to be bare
3ed82cfc 3304 }
bd0865ec 3305 }
09d856fb
CK
3306
3307 return { method => $meth, variable_method => ref($meth),
3308 object => $obj, args => \@exprs };
3309}
3310
3311# compat function only
3312sub method {
3313 my $self = shift;
3314 my $info = $self->_method(@_);
3315 return $self->e_method( $self->_method(@_) );
3316}
3317
3318sub e_method {
3319 my ($self, $info) = @_;
3320 my $obj = $self->deparse($info->{object}, 24);
3321
3322 my $meth = $info->{method};
3323 $meth = $self->deparse($meth, 1) if $info->{variable_method};
3324 my $args = join(", ", map { $self->deparse($_, 6) } @{$info->{args}} );
3325 my $kid = $obj . "->" . $meth;
145eb477 3326 if (length $args) {
bd0865ec
GS
3327 return $kid . "(" . $args . ")"; # parens mandatory
3328 } else {
3329 return $kid;
3330 }
3331}
3332
3333# returns "&" if the prototype doesn't match the args,
3334# or ("", $args_after_prototype_demunging) if it does.
3335sub check_proto {
3336 my $self = shift;
acaaef34 3337 return "&" if $self->{'noproto'};
bd0865ec
GS
3338 my($proto, @args) = @_;
3339 my($arg, $real);
3340 my $doneok = 0;
3341 my @reals;
3342 # An unbackslashed @ or % gobbles up the rest of the args
2ae48fff 3343 1 while $proto =~ s/(?<!\\)([@%])[^\]]+$/$1/;
bd0865ec 3344 while ($proto) {
21b52158 3345 $proto =~ s/^(\\?[\$\@&%*_]|\\\[[\$\@&%*]+\]|;)//;
bd0865ec
GS
3346 my $chr = $1;
3347 if ($chr eq "") {
3348 return "&" if @args;
3349 } elsif ($chr eq ";") {
3350 $doneok = 1;
3351 } elsif ($chr eq "@" or $chr eq "%") {
3352 push @reals, map($self->deparse($_, 6), @args);
3353 @args = ();
6e90668e 3354 } else {
bd0865ec
GS
3355 $arg = shift @args;
3356 last unless $arg;
21b52158 3357 if ($chr eq "\$" || $chr eq "_") {
bd0865ec
GS
3358 if (want_scalar $arg) {
3359 push @reals, $self->deparse($arg, 6);
3360 } else {
3361 return "&";
3362 }
3363 } elsif ($chr eq "&") {
3f872cb9 3364 if ($arg->name =~ /^(s?refgen|undef)$/) {
bd0865ec
GS
3365 push @reals, $self->deparse($arg, 6);
3366 } else {
3367 return "&";
3368 }
3369 } elsif ($chr eq "*") {
3f872cb9
GS
3370 if ($arg->name =~ /^s?refgen$/
3371 and $arg->first->first->name eq "rv2gv")
bd0865ec
GS
3372 {
3373 $real = $arg->first->first; # skip refgen, null
3f872cb9 3374 if ($real->first->name eq "gv") {
bd0865ec
GS
3375 push @reals, $self->deparse($real, 6);
3376 } else {
3377 push @reals, $self->deparse($real->first, 6);
3378 }
3379 } else {
3380 return "&";
3381 }
3382 } elsif (substr($chr, 0, 1) eq "\\") {
2ae48fff 3383 $chr =~ tr/\\[]//d;
3f872cb9 3384 if ($arg->name =~ /^s?refgen$/ and
bd0865ec 3385 !null($real = $arg->first) and
2ae48fff
RGS
3386 ($chr =~ /\$/ && is_scalar($real->first)
3387 or ($chr =~ /@/
3388 && class($real->first->sibling) ne 'NULL'
3f872cb9
GS
3389 && $real->first->sibling->name
3390 =~ /^(rv2|pad)av$/)
2ae48fff
RGS
3391 or ($chr =~ /%/
3392 && class($real->first->sibling) ne 'NULL'
3f872cb9
GS
3393 && $real->first->sibling->name
3394 =~ /^(rv2|pad)hv$/)
2ae48fff 3395 #or ($chr =~ /&/ # This doesn't work
3f872cb9 3396 # && $real->first->name eq "rv2cv")
2ae48fff 3397 or ($chr =~ /\*/
3f872cb9 3398 && $real->first->name eq "rv2gv")))
bd0865ec
GS
3399 {
3400 push @reals, $self->deparse($real, 6);
3401 } else {
3402 return "&";
3403 }
3404 }
3405 }
9d2c6865 3406 }
e38ccfd9 3407 return "&" if $proto and !$doneok; # too few args and no ';'
bd0865ec
GS
3408 return "&" if @args; # too many args
3409 return ("", join ", ", @reals);
3410}
3411
3412sub pp_entersub {
3413 my $self = shift;
3414 my($op, $cx) = @_;
09d856fb
CK
3415 return $self->e_method($self->_method($op, $cx))
3416 unless null $op->first->sibling;
bd0865ec
GS
3417 my $prefix = "";
3418 my $amper = "";
3419 my($kid, @exprs);
90c0eb26 3420 if ($op->flags & OPf_SPECIAL && !($op->flags & OPf_MOD)) {
9d2c6865
SM
3421 $prefix = "do ";
3422 } elsif ($op->private & OPpENTERSUB_AMPER) {
3423 $amper = "&";
3424 }
3425 $kid = $op->first;
3426 $kid = $kid->first->sibling; # skip ex-list, pushmark
3427 for (; not null $kid->sibling; $kid = $kid->sibling) {
3428 push @exprs, $kid;
3429 }