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6e90668e 1# B::Deparse.pm
d989cdac 2# Copyright (c) 1998-2000, 2002, 2003 Stephen McCamant. All rights reserved.
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3# This module is free software; you can redistribute and/or modify
4# it under the same terms as Perl itself.
5
6# This is based on the module of the same name by Malcolm Beattie,
7# but essentially none of his code remains.
8
a798dbf2 9package B::Deparse;
ff97752d 10use Carp;
51a5edaf 11use B qw(class main_root main_start main_cv svref_2object opnumber perlstring
bd0865ec 12 OPf_WANT OPf_WANT_VOID OPf_WANT_SCALAR OPf_WANT_LIST
90c0eb26 13 OPf_KIDS OPf_REF OPf_STACKED OPf_SPECIAL OPf_MOD
ce4e655d 14 OPpLVAL_INTRO OPpOUR_INTRO OPpENTERSUB_AMPER OPpSLICE OPpCONST_BARE
3ed82cfc 15 OPpTRANS_SQUASH OPpTRANS_DELETE OPpTRANS_COMPLEMENT OPpTARGET_MY
7e80da18 16 OPpCONST_ARYBASE OPpEXISTS_SUB OPpSORT_NUMERIC OPpSORT_INTEGER
2b6e98cb 17 OPpSORT_REVERSE OPpSORT_INPLACE
d989cdac 18 SVf_IOK SVf_NOK SVf_ROK SVf_POK SVpad_OUR SVf_FAKE SVs_RMG SVs_SMG
06492da6 19 CVf_METHOD CVf_LOCKED CVf_LVALUE CVf_ASSERTION
fcd95d64 20 PMf_KEEP PMf_GLOBAL PMf_CONTINUE PMf_EVAL PMf_ONCE PMf_SKIPWHITE
bd0865ec 21 PMf_MULTILINE PMf_SINGLELINE PMf_FOLD PMf_EXTENDED);
6cb271b2 22$VERSION = 0.67;
a798dbf2 23use strict;
2ae48fff 24use vars qw/$AUTOLOAD/;
34a48b4b 25use warnings ();
a798dbf2 26
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27# Changes between 0.50 and 0.51:
28# - fixed nulled leave with live enter in sort { }
29# - fixed reference constants (\"str")
30# - handle empty programs gracefully
31# - handle infinte loops (for (;;) {}, while (1) {})
32# - differentiate between `for my $x ...' and `my $x; for $x ...'
33# - various minor cleanups
34# - moved globals into an object
35# - added `-u', like B::C
36# - package declarations using cop_stash
37# - subs, formats and code sorted by cop_seq
f6f9bdb7 38# Changes between 0.51 and 0.52:
4d1ff10f 39# - added pp_threadsv (special variables under USE_5005THREADS)
f6f9bdb7 40# - added documentation
bd0865ec 41# Changes between 0.52 and 0.53:
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42# - many changes adding precedence contexts and associativity
43# - added `-p' and `-s' output style options
44# - various other minor fixes
bd0865ec 45# Changes between 0.53 and 0.54:
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46# - added support for new `for (1..100)' optimization,
47# thanks to Gisle Aas
bd0865ec 48# Changes between 0.54 and 0.55:
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49# - added support for new qr// construct
50# - added support for new pp_regcreset OP
bd0865ec 51# Changes between 0.55 and 0.56:
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52# - tested on base/*.t, cmd/*.t, comp/*.t, io/*.t
53# - fixed $# on non-lexicals broken in last big rewrite
54# - added temporary fix for change in opcode of OP_STRINGIFY
55# - fixed problem in 0.54's for() patch in `for (@ary)'
56# - fixed precedence in conditional of ?:
57# - tweaked list paren elimination in `my($x) = @_'
58# - made continue-block detection trickier wrt. null ops
59# - fixed various prototype problems in pp_entersub
60# - added support for sub prototypes that never get GVs
61# - added unquoting for special filehandle first arg in truncate
62# - print doubled rv2gv (a bug) as `*{*GV}' instead of illegal `**GV'
63# - added semicolons at the ends of blocks
64# - added -l `#line' declaration option -- fixes cmd/subval.t 27,28
bd0865ec
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65# Changes between 0.56 and 0.561:
66# - fixed multiply-declared my var in pp_truncate (thanks to Sarathy)
67# - used new B.pm symbolic constants (done by Nick Ing-Simmons)
68# Changes between 0.561 and 0.57:
69# - stylistic changes to symbolic constant stuff
70# - handled scope in s///e replacement code
71# - added unquote option for expanding "" into concats, etc.
72# - split method and proto parts of pp_entersub into separate functions
73# - various minor cleanups
f4a44678
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74# Changes after 0.57:
75# - added parens in \&foo (patch by Albert Dvornik)
76# Changes between 0.57 and 0.58:
77# - fixed `0' statements that weren't being printed
78# - added methods for use from other programs
79# (based on patches from James Duncan and Hugo van der Sanden)
80# - added -si and -sT to control indenting (also based on a patch from Hugo)
81# - added -sv to print something else instead of '???'
82# - preliminary version of utf8 tr/// handling
3ed82cfc
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83# Changes after 0.58:
84# - uses of $op->ppaddr changed to new $op->name (done by Sarathy)
d989cdac 85# - added support for Hugo's new OP_SETSTATE (like nextstate)
3ed82cfc
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86# Changes between 0.58 and 0.59
87# - added support for Chip's OP_METHOD_NAMED
88# - added support for Ilya's OPpTARGET_MY optimization
89# - elided arrows before `()' subscripts when possible
58cccf98
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90# Changes between 0.59 and 0.60
91# - support for method attribues was added
92# - some warnings fixed
93# - separate recognition of constant subs
94# - rewrote continue block handling, now recoginizing for loops
95# - added more control of expanding control structures
c7f67cde
RH
96# Changes between 0.60 and 0.61 (mostly by Robin Houston)
97# - many bug-fixes
98# - support for pragmas and 'use'
99# - support for the little-used $[ variable
100# - support for __DATA__ sections
101# - UTF8 support
102# - BEGIN, CHECK, INIT and END blocks
103# - scoping of subroutine declarations fixed
104# - compile-time output from the input program can be suppressed, so that the
105# output is just the deparsed code. (a change to O.pm in fact)
106# - our() declarations
107# - *all* the known bugs are now listed in the BUGS section
108# - comprehensive test mechanism (TEST -deparse)
9a58b761
RGS
109# Changes between 0.62 and 0.63 (mostly by Rafael Garcia-Suarez)
110# - bug-fixes
111# - new switch -P
112# - support for command-line switches (-l, -0, etc.)
d989cdac
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113# Changes between 0.63 and 0.64
114# - support for //, CHECK blocks, and assertions
115# - improved handling of foreach loops and lexicals
116# - option to use Data::Dumper for constants
117# - more bug fixes
118# - discovered lots more bugs not yet fixed
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119
120# Todo:
2a9e2f8a
RH
121# (See also BUGS section at the end of this file)
122#
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123# - finish tr/// changes
124# - add option for even more parens (generalize \&foo change)
90be192f 125# - left/right context
58cccf98 126# - copy comments (look at real text with $^P?)
f5aa8f4e 127# - avoid semis in one-statement blocks
9d2c6865 128# - associativity of &&=, ||=, ?:
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129# - ',' => '=>' (auto-unquote?)
130# - break long lines ("\r" as discretionary break?)
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131# - configurable syntax highlighting: ANSI color, HTML, TeX, etc.
132# - more style options: brace style, hex vs. octal, quotes, ...
133# - print big ints as hex/octal instead of decimal (heuristic?)
3ed82cfc 134# - handle `my $x if 0'?
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135# - version using op_next instead of op_first/sibling?
136# - avoid string copies (pass arrays, one big join?)
9d2c6865 137# - here-docs?
6e90668e 138
d989cdac
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139# Current test.deparse failures
140# comp/assertions 38 - disabled assertions should be like "my($x) if 0"
141# 'sub f : assertion {}; no assertions; my $x=1; {f(my $x=2); print "$x\n"}'
142# comp/hints 6 - location of BEGIN blocks wrt. block openings
143# run/switchI 1 - missing -I switches entirely
144# perl -Ifoo -e 'print @INC'
145# op/caller 2 - warning mask propagates backwards before warnings::register
146# 'use warnings; BEGIN {${^WARNING_BITS} eq "U"x12;} use warnings::register'
147# op/getpid 2 - can't assign to shared my() declaration (threads only)
148# 'my $x : shared = 5'
149# op/override 7 - parens on overriden require change v-string interpretation
150# 'BEGIN{*CORE::GLOBAL::require=sub {}} require v5.6'
151# c.f. 'BEGIN { *f = sub {0} }; f 2'
152# op/pat 774 - losing Unicode-ness of Latin1-only strings
153# 'use charnames ":short"; $x="\N{latin:a with acute}"'
154# op/recurse 12 - missing parens on recursive call makes it look like method
155# 'sub f { f($x) }'
156# op/subst 90 - inconsistent handling of utf8 under "use utf8"
157# op/taint 29 - "use re 'taint'" deparsed in the wrong place wrt. block open
158# op/tiehandle compile - "use strict" deparsed in the wrong place
159# uni/tr_ several
160# ext/B/t/xref 11 - line numbers when we add newlines to one-line subs
161# ext/Data/Dumper/t/dumper compile
162# ext/DB_file/several
163# ext/Encode/several
164# ext/Ernno/Errno warnings
165# ext/IO/lib/IO/t/io_sel 23
166# ext/PerlIO/t/encoding compile
167# ext/POSIX/t/posix 6
168# ext/Socket/Socket 8
169# ext/Storable/t/croak compile
170# lib/Attribute/Handlers/t/multi compile
171# lib/bignum/ several
172# lib/charnames 35
173# lib/constant 32
174# lib/English 40
175# lib/ExtUtils/t/bytes 4
176# lib/File/DosGlob compile
177# lib/Filter/Simple/t/data 1
178# lib/Math/BigInt/t/constant 1
179# lib/Net/t/config Deparse-warning
180# lib/overload compile
181# lib/Switch/ several
182# lib/Symbol 4
183# lib/Test/Simple several
184# lib/Term/Complete
185# lib/Tie/File/t/29_downcopy 5
186# lib/vars 22
f5aa8f4e 187
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188# Object fields (were globals):
189#
190# avoid_local:
191# (local($a), local($b)) and local($a, $b) have the same internal
192# representation but the short form looks better. We notice we can
193# use a large-scale local when checking the list, but need to prevent
d989cdac 194# individual locals too. This hash holds the addresses of OPs that
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195# have already had their local-ness accounted for. The same thing
196# is done with my().
197#
198# curcv:
199# CV for current sub (or main program) being deparsed
200#
8510e997
RH
201# curcvlex:
202# Cached hash of lexical variables for curcv: keys are names,
203# each value is an array of pairs, indicating the cop_seq of scopes
204# in which a var of that name is valid.
205#
34a48b4b
RH
206# curcop:
207# COP for statement being deparsed
208#
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209# curstash:
210# name of the current package for deparsed code
211#
212# subs_todo:
34a48b4b 213# array of [cop_seq, CV, is_format?] for subs and formats we still
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214# want to deparse
215#
f5aa8f4e
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216# protos_todo:
217# as above, but [name, prototype] for subs that never got a GV
218#
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219# subs_done, forms_done:
220# keys are addresses of GVs for subs and formats we've already
221# deparsed (or at least put into subs_todo)
9d2c6865 222#
0ca62a8e
RH
223# subs_declared
224# keys are names of subs for which we've printed declarations.
225# That means we can omit parentheses from the arguments.
226#
1d38190f
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227# subs_deparsed
228# Keeps track of fully qualified names of all deparsed subs.
229#
9d2c6865 230# parens: -p
f5aa8f4e 231# linenums: -l
bd0865ec 232# unquote: -q
9d2c6865 233# cuddle: ` ' or `\n', depending on -sC
f4a44678
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234# indent_size: -si
235# use_tabs: -sT
236# ex_const: -sv
9d2c6865
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237
238# A little explanation of how precedence contexts and associativity
239# work:
240#
241# deparse() calls each per-op subroutine with an argument $cx (short
242# for context, but not the same as the cx* in the perl core), which is
243# a number describing the op's parents in terms of precedence, whether
f5aa8f4e 244# they're inside an expression or at statement level, etc. (see
9d2c6865
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245# chart below). When ops with children call deparse on them, they pass
246# along their precedence. Fractional values are used to implement
247# associativity (`($x + $y) + $z' => `$x + $y + $y') and related
248# parentheses hacks. The major disadvantage of this scheme is that
249# it doesn't know about right sides and left sides, so say if you
250# assign a listop to a variable, it can't tell it's allowed to leave
251# the parens off the listop.
252
253# Precedences:
254# 26 [TODO] inside interpolation context ("")
255# 25 left terms and list operators (leftward)
256# 24 left ->
257# 23 nonassoc ++ --
258# 22 right **
259# 21 right ! ~ \ and unary + and -
260# 20 left =~ !~
261# 19 left * / % x
262# 18 left + - .
263# 17 left << >>
264# 16 nonassoc named unary operators
265# 15 nonassoc < > <= >= lt gt le ge
266# 14 nonassoc == != <=> eq ne cmp
267# 13 left &
268# 12 left | ^
269# 11 left &&
270# 10 left ||
271# 9 nonassoc .. ...
272# 8 right ?:
273# 7 right = += -= *= etc.
274# 6 left , =>
275# 5 nonassoc list operators (rightward)
276# 4 right not
277# 3 left and
278# 2 left or xor
279# 1 statement modifiers
d989cdac 280# 0.5 statements, but still print scopes as do { ... }
9d2c6865
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281# 0 statement level
282
283# Nonprinting characters with special meaning:
284# \cS - steal parens (see maybe_parens_unop)
285# \n - newline and indent
286# \t - increase indent
287# \b - decrease indent (`outdent')
f5aa8f4e 288# \f - flush left (no indent)
9d2c6865 289# \cK - kill following semicolon, if any
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290
291sub null {
292 my $op = shift;
293 return class($op) eq "NULL";
294}
295
296sub todo {
297 my $self = shift;
34a48b4b 298 my($cv, $is_form) = @_;
e31885a0 299 return unless ($cv->FILE eq $0 || exists $self->{files}{$cv->FILE});
6e90668e 300 my $seq;
d989cdac
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301 if ($cv->OUTSIDE_SEQ) {
302 $seq = $cv->OUTSIDE_SEQ;
303 } elsif (!null($cv->START) and is_state($cv->START)) {
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304 $seq = $cv->START->cop_seq;
305 } else {
306 $seq = 0;
307 }
34a48b4b 308 push @{$self->{'subs_todo'}}, [$seq, $cv, $is_form];
1d38190f
RGS
309 unless ($is_form || class($cv->STASH) eq 'SPECIAL') {
310 $self->{'subs_deparsed'}{$cv->STASH->NAME."::".$cv->GV->NAME} = 1;
311 }
6e90668e
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312}
313
314sub next_todo {
315 my $self = shift;
316 my $ent = shift @{$self->{'subs_todo'}};
34a48b4b
RH
317 my $cv = $ent->[1];
318 my $gv = $cv->GV;
319 my $name = $self->gv_name($gv);
6e90668e
SM
320 if ($ent->[2]) {
321 return "format $name =\n"
e31885a0 322 . $self->deparse_format($ent->[1]). "\n";
6e90668e 323 } else {
0ca62a8e 324 $self->{'subs_declared'}{$name} = 1;
34a48b4b
RH
325 if ($name eq "BEGIN") {
326 my $use_dec = $self->begin_is_use($cv);
d989cdac 327 if (defined ($use_dec) and $self->{'expand'} < 5) {
0e7fe0f0
RH
328 return () if 0 == length($use_dec);
329 return $use_dec;
330 }
34a48b4b 331 }
a0035eb8
RH
332 my $l = '';
333 if ($self->{'linenums'}) {
334 my $line = $gv->LINE;
335 my $file = $gv->FILE;
336 $l = "\n\f#line $line \"$file\"\n";
337 }
127212b2
DM
338 my $p = '';
339 if (class($cv->STASH) ne "SPECIAL") {
340 my $stash = $cv->STASH->NAME;
341 if ($stash ne $self->{'curstash'}) {
342 $p = "package $stash;\n";
343 $name = "$self->{'curstash'}::$name" unless $name =~ /::/;
344 $self->{'curstash'} = $stash;
345 }
346 $name =~ s/^\Q$stash\E:://;
347 }
348 return "${p}${l}sub $name " . $self->deparse_sub($cv);
34a48b4b
RH
349 }
350}
351
352# Return a "use" declaration for this BEGIN block, if appropriate
353sub begin_is_use {
354 my ($self, $cv) = @_;
355 my $root = $cv->ROOT;
80dc0729 356 local @$self{qw'curcv curcvlex'} = ($cv);
34a48b4b
RH
357#require B::Debug;
358#B::walkoptree($cv->ROOT, "debug");
359 my $lineseq = $root->first;
360 return if $lineseq->name ne "lineseq";
361
362 my $req_op = $lineseq->first->sibling;
363 return if $req_op->name ne "require";
364
365 my $module;
366 if ($req_op->first->private & OPpCONST_BARE) {
367 # Actually it should always be a bareword
368 $module = $self->const_sv($req_op->first)->PV;
369 $module =~ s[/][::]g;
370 $module =~ s/.pm$//;
371 }
372 else {
d989cdac 373 $module = $self->const($self->const_sv($req_op->first), 6);
34a48b4b
RH
374 }
375
376 my $version;
377 my $version_op = $req_op->sibling;
378 return if class($version_op) eq "NULL";
379 if ($version_op->name eq "lineseq") {
380 # We have a version parameter; skip nextstate & pushmark
381 my $constop = $version_op->first->next->next;
382
383 return unless $self->const_sv($constop)->PV eq $module;
384 $constop = $constop->sibling;
a58644de 385 $version = $self->const_sv($constop);
d989cdac
SM
386 if (class($version) eq "IV") {
387 $version = $version->int_value;
388 } elsif (class($version) eq "NV") {
389 $version = $version->NV;
390 } elsif (class($version) ne "PVMG") {
391 # Includes PVIV and PVNV
a58644de
RGS
392 $version = $version->PV;
393 } else {
394 # version specified as a v-string
395 $version = 'v'.join '.', map ord, split //, $version->PV;
396 }
34a48b4b
RH
397 $constop = $constop->sibling;
398 return if $constop->name ne "method_named";
399 return if $self->const_sv($constop)->PV ne "VERSION";
400 }
401
402 $lineseq = $version_op->sibling;
403 return if $lineseq->name ne "lineseq";
404 my $entersub = $lineseq->first->sibling;
405 if ($entersub->name eq "stub") {
406 return "use $module $version ();\n" if defined $version;
407 return "use $module ();\n";
408 }
409 return if $entersub->name ne "entersub";
410
411 # See if there are import arguments
412 my $args = '';
413
6ec152c3
RH
414 my $svop = $entersub->first->sibling; # Skip over pushmark
415 return unless $self->const_sv($svop)->PV eq $module;
34a48b4b
RH
416
417 # Pull out the arguments
6ec152c3
RH
418 for ($svop=$svop->sibling; $svop->name ne "method_named";
419 $svop = $svop->sibling) {
34a48b4b 420 $args .= ", " if length($args);
6ec152c3 421 $args .= $self->deparse($svop, 6);
34a48b4b
RH
422 }
423
424 my $use = 'use';
6ec152c3 425 my $method_named = $svop;
34a48b4b
RH
426 return if $method_named->name ne "method_named";
427 my $method_name = $self->const_sv($method_named)->PV;
428
429 if ($method_name eq "unimport") {
430 $use = 'no';
431 }
432
433 # Certain pragmas are dealt with using hint bits,
434 # so we ignore them here
435 if ($module eq 'strict' || $module eq 'integer'
0e7fe0f0 436 || $module eq 'bytes' || $module eq 'warnings') {
34a48b4b
RH
437 return "";
438 }
439
440 if (defined $version && length $args) {
441 return "$use $module $version ($args);\n";
442 } elsif (defined $version) {
443 return "$use $module $version;\n";
444 } elsif (length $args) {
445 return "$use $module ($args);\n";
446 } else {
447 return "$use $module;\n";
6e90668e
SM
448 }
449}
450
6e90668e 451sub stash_subs {
34a48b4b
RH
452 my ($self, $pack) = @_;
453 my (@ret, $stash);
454 if (!defined $pack) {
455 $pack = '';
456 $stash = \%::;
f5aa8f4e 457 }
34a48b4b
RH
458 else {
459 $pack =~ s/(::)?$/::/;
460 no strict 'refs';
461 $stash = \%$pack;
462 }
463 my %stash = svref_2object($stash)->ARRAY;
464 while (my ($key, $val) = each %stash) {
465 next if $key eq 'main::'; # avoid infinite recursion
f5aa8f4e
SM
466 my $class = class($val);
467 if ($class eq "PV") {
a0035eb8
RH
468 # Just a prototype. As an ugly but fairly effective way
469 # to find out if it belongs here is to see if the AUTOLOAD
470 # (if any) for the stash was defined in one of our files.
471 my $A = $stash{"AUTOLOAD"};
472 if (defined ($A) && class($A) eq "GV" && defined($A->CV)
473 && class($A->CV) eq "CV") {
474 my $AF = $A->FILE;
475 next unless $AF eq $0 || exists $self->{'files'}{$AF};
476 }
f5aa8f4e
SM
477 push @{$self->{'protos_todo'}}, [$pack . $key, $val->PV];
478 } elsif ($class eq "IV") {
a0035eb8
RH
479 # Just a name. As above.
480 my $A = $stash{"AUTOLOAD"};
481 if (defined ($A) && class($A) eq "GV" && defined($A->CV)
482 && class($A->CV) eq "CV") {
483 my $AF = $A->FILE;
484 next unless $AF eq $0 || exists $self->{'files'}{$AF};
485 }
d989cdac 486 push @{$self->{'protos_todo'}}, [$pack . $key, undef];
f5aa8f4e 487 } elsif ($class eq "GV") {
34a48b4b 488 if (class(my $cv = $val->CV) ne "SPECIAL") {
f5aa8f4e 489 next if $self->{'subs_done'}{$$val}++;
e31885a0 490 next if $$val != ${$cv->GV}; # Ignore imposters
8510e997 491 $self->todo($cv, 0);
f5aa8f4e 492 }
e31885a0 493 if (class(my $cv = $val->FORM) ne "SPECIAL") {
f5aa8f4e 494 next if $self->{'forms_done'}{$$val}++;
e31885a0
RH
495 next if $$val != ${$cv->GV}; # Ignore imposters
496 $self->todo($cv, 1);
f5aa8f4e 497 }
34a48b4b
RH
498 if (class($val->HV) ne "SPECIAL" && $key =~ /::$/) {
499 $self->stash_subs($pack . $key);
500 }
6e90668e
SM
501 }
502 }
503}
a798dbf2 504
f5aa8f4e
SM
505sub print_protos {
506 my $self = shift;
507 my $ar;
508 my @ret;
509 foreach $ar (@{$self->{'protos_todo'}}) {
510 my $proto = (defined $ar->[1] ? " (". $ar->[1] . ")" : "");
511 push @ret, "sub " . $ar->[0] . "$proto;\n";
512 }
513 delete $self->{'protos_todo'};
514 return @ret;
515}
516
9d2c6865
SM
517sub style_opts {
518 my $self = shift;
519 my $opts = shift;
520 my $opt;
521 while (length($opt = substr($opts, 0, 1))) {
522 if ($opt eq "C") {
523 $self->{'cuddle'} = " ";
f4a44678
SM
524 $opts = substr($opts, 1);
525 } elsif ($opt eq "i") {
526 $opts =~ s/^i(\d+)//;
527 $self->{'indent_size'} = $1;
528 } elsif ($opt eq "T") {
529 $self->{'use_tabs'} = 1;
530 $opts = substr($opts, 1);
531 } elsif ($opt eq "v") {
532 $opts =~ s/^v([^.]*)(.|$)//;
533 $self->{'ex_const'} = $1;
9d2c6865 534 }
9d2c6865
SM
535 }
536}
537
f4a44678
SM
538sub new {
539 my $class = shift;
540 my $self = bless {}, $class;
f4a44678 541 $self->{'cuddle'} = "\n";
d989cdac
SM
542 $self->{'curcop'} = undef;
543 $self->{'curstash'} = "main";
544 $self->{'ex_const'} = "'???'";
793e2a70 545 $self->{'expand'} = 0;
d989cdac
SM
546 $self->{'files'} = {};
547 $self->{'indent_size'} = 4;
793e2a70
RH
548 $self->{'linenums'} = 0;
549 $self->{'parens'} = 0;
d989cdac
SM
550 $self->{'subs_todo'} = [];
551 $self->{'unquote'} = 0;
552 $self->{'use_dumper'} = 0;
553 $self->{'use_tabs'} = 0;
08c6f5ec
RH
554
555 $self->{'ambient_arybase'} = 0;
e31885a0 556 $self->{'ambient_warnings'} = undef; # Assume no lexical warnings
a0405c92 557 $self->{'ambient_hints'} = 0;
08c6f5ec
RH
558 $self->init();
559
f4a44678 560 while (my $arg = shift @_) {
d989cdac
SM
561 if ($arg eq "-d") {
562 $self->{'use_dumper'} = 1;
563 require Data::Dumper;
564 } elsif ($arg =~ /^-f(.*)/) {
34a48b4b 565 $self->{'files'}{$1} = 1;
d989cdac
SM
566 } elsif ($arg eq "-l") {
567 $self->{'linenums'} = 1;
f4a44678
SM
568 } elsif ($arg eq "-p") {
569 $self->{'parens'} = 1;
acaaef34
RGS
570 } elsif ($arg eq "-P") {
571 $self->{'noproto'} = 1;
f4a44678
SM
572 } elsif ($arg eq "-q") {
573 $self->{'unquote'} = 1;
574 } elsif (substr($arg, 0, 2) eq "-s") {
575 $self->style_opts(substr $arg, 2);
58cccf98
SM
576 } elsif ($arg =~ /^-x(\d)$/) {
577 $self->{'expand'} = $1;
f4a44678
SM
578 }
579 }
580 return $self;
581}
582
810aef70
RH
583{
584 # Mask out the bits that L<warnings::register> uses
585 my $WARN_MASK;
586 BEGIN {
587 $WARN_MASK = $warnings::Bits{all} | $warnings::DeadBits{all};
588 }
589 sub WARN_MASK () {
590 return $WARN_MASK;
591 }
34a48b4b
RH
592}
593
08c6f5ec
RH
594# Initialise the contextual information, either from
595# defaults provided with the ambient_pragmas method,
596# or from perl's own defaults otherwise.
597sub init {
598 my $self = shift;
599
600 $self->{'arybase'} = $self->{'ambient_arybase'};
e31885a0
RH
601 $self->{'warnings'} = defined ($self->{'ambient_warnings'})
602 ? $self->{'ambient_warnings'} & WARN_MASK
603 : undef;
a0405c92 604 $self->{'hints'} = $self->{'ambient_hints'} & 0xFF;
217aba5d
RH
605
606 # also a convenient place to clear out subs_declared
607 delete $self->{'subs_declared'};
08c6f5ec
RH
608}
609
a798dbf2 610sub compile {
6e90668e 611 my(@args) = @_;
d989cdac 612 return sub {
f4a44678 613 my $self = B::Deparse->new(@args);
d2bc402e
RGS
614 # First deparse command-line args
615 if (defined $^I) { # deparse -i
51a5edaf 616 print q(BEGIN { $^I = ).perlstring($^I).qq(; }\n);
d2bc402e
RGS
617 }
618 if ($^W) { # deparse -w
619 print qq(BEGIN { \$^W = $^W; }\n);
620 }
621 if ($/ ne "\n" or defined $O::savebackslash) { # deparse -l and -0
51a5edaf
RGS
622 my $fs = perlstring($/) || 'undef';
623 my $bs = perlstring($O::savebackslash) || 'undef';
d2bc402e
RGS
624 print qq(BEGIN { \$/ = $fs; \$\\ = $bs; }\n);
625 }
34a48b4b 626 my @BEGINs = B::begin_av->isa("B::AV") ? B::begin_av->ARRAY : ();
ece599bd 627 my @CHECKs = B::check_av->isa("B::AV") ? B::check_av->ARRAY : ();
34a48b4b
RH
628 my @INITs = B::init_av->isa("B::AV") ? B::init_av->ARRAY : ();
629 my @ENDs = B::end_av->isa("B::AV") ? B::end_av->ARRAY : ();
ece599bd 630 for my $block (@BEGINs, @CHECKs, @INITs, @ENDs) {
e31885a0 631 $self->todo($block, 0);
34a48b4b
RH
632 }
633 $self->stash_subs();
d989cdac
SM
634 local($SIG{"__DIE__"}) =
635 sub {
636 if ($self->{'curcop'}) {
637 my $cop = $self->{'curcop'};
638 my($line, $file) = ($cop->line, $cop->file);
639 print STDERR "While deparsing $file near line $line,\n";
640 }
641 };
6e90668e 642 $self->{'curcv'} = main_cv;
8510e997 643 $self->{'curcvlex'} = undef;
f5aa8f4e 644 print $self->print_protos;
6e90668e 645 @{$self->{'subs_todo'}} =
f4a44678 646 sort {$a->[0] <=> $b->[0]} @{$self->{'subs_todo'}};
d989cdac 647 print $self->indent($self->deparse_root(main_root)), "\n"
f4a44678 648 unless null main_root;
6e90668e
SM
649 my @text;
650 while (scalar(@{$self->{'subs_todo'}})) {
651 push @text, $self->next_todo;
652 }
6f611a1a 653 print $self->indent(join("", @text)), "\n" if @text;
e31885a0
RH
654
655 # Print __DATA__ section, if necessary
656 no strict 'refs';
96c57f7e
RGS
657 my $laststash = defined $self->{'curcop'}
658 ? $self->{'curcop'}->stash->NAME : $self->{'curstash'};
659 if (defined *{$laststash."::DATA"}{IO}) {
127212b2
DM
660 print "package $laststash;\n"
661 unless $laststash eq $self->{'curstash'};
e31885a0 662 print "__DATA__\n";
96c57f7e 663 print readline(*{$laststash."::DATA"});
e31885a0 664 }
a798dbf2 665 }
a798dbf2
MB
666}
667
f4a44678
SM
668sub coderef2text {
669 my $self = shift;
670 my $sub = shift;
0853f172 671 croak "Usage: ->coderef2text(CODEREF)" unless UNIVERSAL::isa($sub, "CODE");
08c6f5ec
RH
672
673 $self->init();
f4a44678
SM
674 return $self->indent($self->deparse_sub(svref_2object($sub)));
675}
676
08c6f5ec
RH
677sub ambient_pragmas {
678 my $self = shift;
e31885a0 679 my ($arybase, $hint_bits, $warning_bits) = (0, 0);
08c6f5ec
RH
680
681 while (@_ > 1) {
682 my $name = shift();
683 my $val = shift();
684
685 if ($name eq 'strict') {
686 require strict;
687
688 if ($val eq 'none') {
689 $hint_bits &= ~strict::bits(qw/refs subs vars/);
690 next();
691 }
692
693 my @names;
694 if ($val eq "all") {
695 @names = qw/refs subs vars/;
696 }
697 elsif (ref $val) {
698 @names = @$val;
699 }
700 else {
a0405c92 701 @names = split' ', $val;
08c6f5ec
RH
702 }
703 $hint_bits |= strict::bits(@names);
704 }
705
706 elsif ($name eq '$[') {
707 $arybase = $val;
708 }
709
a0405c92
RH
710 elsif ($name eq 'integer'
711 || $name eq 'bytes'
712 || $name eq 'utf8') {
713 require "$name.pm";
08c6f5ec 714 if ($val) {
a0405c92
RH
715 $hint_bits |= ${$::{"${name}::"}{"hint_bits"}};
716 }
717 else {
718 $hint_bits &= ~${$::{"${name}::"}{"hint_bits"}};
719 }
720 }
721
722 elsif ($name eq 're') {
723 require re;
724 if ($val eq 'none') {
2570cdf1 725 $hint_bits &= ~re::bits(qw/taint eval/);
a0405c92
RH
726 next();
727 }
728
729 my @names;
730 if ($val eq 'all') {
2570cdf1 731 @names = qw/taint eval/;
a0405c92
RH
732 }
733 elsif (ref $val) {
734 @names = @$val;
08c6f5ec
RH
735 }
736 else {
a0405c92 737 @names = split' ',$val;
08c6f5ec 738 }
a0405c92 739 $hint_bits |= re::bits(@names);
08c6f5ec
RH
740 }
741
742 elsif ($name eq 'warnings') {
08c6f5ec 743 if ($val eq 'none') {
810aef70 744 $warning_bits = $warnings::NONE;
08c6f5ec
RH
745 next();
746 }
747
748 my @names;
749 if (ref $val) {
750 @names = @$val;
751 }
752 else {
753 @names = split/\s+/, $val;
754 }
755
810aef70 756 $warning_bits = $warnings::NONE if !defined ($warning_bits);
08c6f5ec
RH
757 $warning_bits |= warnings::bits(@names);
758 }
759
760 elsif ($name eq 'warning_bits') {
761 $warning_bits = $val;
762 }
763
764 elsif ($name eq 'hint_bits') {
765 $hint_bits = $val;
766 }
767
768 else {
769 croak "Unknown pragma type: $name";
770 }
771 }
772 if (@_) {
773 croak "The ambient_pragmas method expects an even number of args";
774 }
775
776 $self->{'ambient_arybase'} = $arybase;
777 $self->{'ambient_warnings'} = $warning_bits;
a0405c92 778 $self->{'ambient_hints'} = $hint_bits;
08c6f5ec
RH
779}
780
d989cdac 781# This method is the inner loop, so try to keep it simple
6e90668e
SM
782sub deparse {
783 my $self = shift;
d989cdac 784 my($op, $cx) = @_;
34a48b4b
RH
785
786 Carp::confess("Null op in deparse") if !defined($op)
787 || class($op) eq "NULL";
3f872cb9 788 my $meth = "pp_" . $op->name;
9d2c6865 789 return $self->$meth($op, $cx);
a798dbf2
MB
790}
791
6e90668e 792sub indent {
f4a44678 793 my $self = shift;
6e90668e
SM
794 my $txt = shift;
795 my @lines = split(/\n/, $txt);
796 my $leader = "";
f4a44678 797 my $level = 0;
6e90668e
SM
798 my $line;
799 for $line (@lines) {
f4a44678
SM
800 my $cmd = substr($line, 0, 1);
801 if ($cmd eq "\t" or $cmd eq "\b") {
802 $level += ($cmd eq "\t" ? 1 : -1) * $self->{'indent_size'};
803 if ($self->{'use_tabs'}) {
804 $leader = "\t" x ($level / 8) . " " x ($level % 8);
805 } else {
806 $leader = " " x $level;
807 }
6e90668e
SM
808 $line = substr($line, 1);
809 }
f5aa8f4e
SM
810 if (substr($line, 0, 1) eq "\f") {
811 $line = substr($line, 1); # no indent
812 } else {
813 $line = $leader . $line;
814 }
9d2c6865 815 $line =~ s/\cK;?//g;
6e90668e
SM
816 }
817 return join("\n", @lines);
818}
819
6e90668e
SM
820sub deparse_sub {
821 my $self = shift;
822 my $cv = shift;
823 my $proto = "";
ce4e655d 824Carp::confess("NULL in deparse_sub") if !defined($cv) || $cv->isa("B::NULL");
34a48b4b
RH
825Carp::confess("SPECIAL in deparse_sub") if $cv->isa("B::SPECIAL");
826 local $self->{'curcop'} = $self->{'curcop'};
6e90668e
SM
827 if ($cv->FLAGS & SVf_POK) {
828 $proto = "(". $cv->PV . ") ";
829 }
06492da6 830 if ($cv->CvFLAGS & (CVf_METHOD|CVf_LOCKED|CVf_LVALUE|CVf_ASSERTION)) {
6aaf4108
SC
831 $proto .= ": ";
832 $proto .= "lvalue " if $cv->CvFLAGS & CVf_LVALUE;
833 $proto .= "locked " if $cv->CvFLAGS & CVf_LOCKED;
834 $proto .= "method " if $cv->CvFLAGS & CVf_METHOD;
06492da6 835 $proto .= "assertion " if $cv->CvFLAGS & CVf_ASSERTION;
6aaf4108
SC
836 }
837
6e90668e 838 local($self->{'curcv'}) = $cv;
8510e997 839 local($self->{'curcvlex'});
a0405c92
RH
840 local(@$self{qw'curstash warnings hints'})
841 = @$self{qw'curstash warnings hints'};
ce4e655d 842 my $body;
6e90668e 843 if (not null $cv->ROOT) {
ce4e655d
RH
844 my $lineseq = $cv->ROOT->first;
845 if ($lineseq->name eq "lineseq") {
846 my @ops;
847 for(my$o=$lineseq->first; $$o; $o=$o->sibling) {
848 push @ops, $o;
849 }
850 $body = $self->lineseq(undef, @ops).";";
851 my $scope_en = $self->find_scope_en($lineseq);
852 if (defined $scope_en) {
853 my $subs = join"", $self->seq_subs($scope_en);
854 $body .= ";\n$subs" if length($subs);
855 }
856 }
857 else {
858 $body = $self->deparse($cv->ROOT->first, 0);
859 }
de3f1649 860 }
ce4e655d
RH
861 else {
862 my $sv = $cv->const_sv;
863 if ($$sv) {
864 # uh-oh. inlinable sub... format it differently
d989cdac 865 return $proto . "{ " . $self->const($sv, 0) . " }\n";
ce4e655d
RH
866 } else { # XSUB? (or just a declaration)
867 return "$proto;\n";
868 }
6e90668e 869 }
ce4e655d 870 return $proto ."{\n\t$body\n\b}" ."\n";
6e90668e
SM
871}
872
873sub deparse_format {
874 my $self = shift;
875 my $form = shift;
876 my @text;
877 local($self->{'curcv'}) = $form;
8510e997 878 local($self->{'curcvlex'});
67fc2416 879 local($self->{'in_format'}) = 1;
a0405c92 880 local(@$self{qw'curstash warnings hints'})
67fc2416 881 = @$self{qw'curstash warnings hints'};
6e90668e
SM
882 my $op = $form->ROOT;
883 my $kid;
fb725297
RGS
884 return "\f." if $op->first->name eq 'stub'
885 || $op->first->name eq 'nextstate';
6e90668e
SM
886 $op = $op->first->first; # skip leavewrite, lineseq
887 while (not null $op) {
888 $op = $op->sibling; # skip nextstate
889 my @exprs;
890 $kid = $op->first->sibling; # skip pushmark
a5b0cd91 891 push @text, "\f".$self->const_sv($kid)->PV;
6e90668e
SM
892 $kid = $kid->sibling;
893 for (; not null $kid; $kid = $kid->sibling) {
9d2c6865 894 push @exprs, $self->deparse($kid, 0);
6e90668e 895 }
a5b0cd91 896 push @text, "\f".join(", ", @exprs)."\n" if @exprs;
6e90668e
SM
897 $op = $op->sibling;
898 }
a5b0cd91 899 return join("", @text) . "\f.";
6e90668e
SM
900}
901
6e90668e 902sub is_scope {
a798dbf2 903 my $op = shift;
3f872cb9
GS
904 return $op->name eq "leave" || $op->name eq "scope"
905 || $op->name eq "lineseq"
d989cdac 906 || ($op->name eq "null" && class($op) eq "UNOP"
3f872cb9 907 && (is_scope($op->first) || $op->first->name eq "enter"));
6e90668e
SM
908}
909
910sub is_state {
3f872cb9
GS
911 my $name = $_[0]->name;
912 return $name eq "nextstate" || $name eq "dbstate" || $name eq "setstate";
6e90668e
SM
913}
914
915sub is_miniwhile { # check for one-line loop (`foo() while $y--')
916 my $op = shift;
d989cdac 917 return (!null($op) and null($op->sibling)
3f872cb9
GS
918 and $op->name eq "null" and class($op) eq "UNOP"
919 and (($op->first->name =~ /^(and|or)$/
920 and $op->first->first->sibling->name eq "lineseq")
921 or ($op->first->name eq "lineseq"
6e90668e 922 and not null $op->first->first->sibling
3f872cb9 923 and $op->first->first->sibling->name eq "unstack")
6e90668e
SM
924 ));
925}
926
d989cdac
SM
927# Check if the op and its sibling are the initialization and the rest of a
928# for (..;..;..) { ... } loop
929sub is_for_loop {
930 my $op = shift;
931 # This OP might be almost anything, though it won't be a
932 # nextstate. (It's the initialization, so in the canonical case it
933 # will be an sassign.) The sibling is a lineseq whose first child
934 # is a nextstate and whose second is a leaveloop.
935 my $lseq = $op->sibling;
936 if (!is_state $op and !null($lseq) and $lseq->name eq "lineseq") {
937 if ($lseq->first && !null($lseq->first) && is_state($lseq->first)
938 && (my $sib = $lseq->first->sibling)) {
939 return (!null($sib) && $sib->name eq "leaveloop");
940 }
941 }
942 return 0;
943}
944
6e90668e
SM
945sub is_scalar {
946 my $op = shift;
3f872cb9
GS
947 return ($op->name eq "rv2sv" or
948 $op->name eq "padsv" or
949 $op->name eq "gv" or # only in array/hash constructs
bd0865ec 950 $op->flags & OPf_KIDS && !null($op->first)
3f872cb9 951 && $op->first->name eq "gvsv");
6e90668e
SM
952}
953
9d2c6865
SM
954sub maybe_parens {
955 my $self = shift;
956 my($text, $cx, $prec) = @_;
957 if ($prec < $cx # unary ops nest just fine
958 or $prec == $cx and $cx != 4 and $cx != 16 and $cx != 21
959 or $self->{'parens'})
960 {
961 $text = "($text)";
962 # In a unop, let parent reuse our parens; see maybe_parens_unop
963 $text = "\cS" . $text if $cx == 16;
964 return $text;
965 } else {
966 return $text;
967 }
968}
969
970# same as above, but get around the `if it looks like a function' rule
971sub maybe_parens_unop {
972 my $self = shift;
973 my($name, $kid, $cx) = @_;
974 if ($cx > 16 or $self->{'parens'}) {
a0035eb8
RH
975 $kid = $self->deparse($kid, 1);
976 if ($name eq "umask" && $kid =~ /^\d+$/) {
977 $kid = sprintf("%#o", $kid);
978 }
979 return "$name($kid)";
9d2c6865
SM
980 } else {
981 $kid = $self->deparse($kid, 16);
a0035eb8
RH
982 if ($name eq "umask" && $kid =~ /^\d+$/) {
983 $kid = sprintf("%#o", $kid);
984 }
9d2c6865
SM
985 if (substr($kid, 0, 1) eq "\cS") {
986 # use kid's parens
987 return $name . substr($kid, 1);
988 } elsif (substr($kid, 0, 1) eq "(") {
989 # avoid looks-like-a-function trap with extra parens
990 # (`+' can lead to ambiguities)
991 return "$name(" . $kid . ")";
992 } else {
993 return "$name $kid";
994 }
995 }
996}
997
998sub maybe_parens_func {
999 my $self = shift;
1000 my($func, $text, $cx, $prec) = @_;
1001 if ($prec <= $cx or substr($text, 0, 1) eq "(" or $self->{'parens'}) {
1002 return "$func($text)";
1003 } else {
1004 return "$func $text";
1005 }
1006}
1007
6e90668e
SM
1008sub maybe_local {
1009 my $self = shift;
9d2c6865 1010 my($op, $cx, $text) = @_;
ce4e655d
RH
1011 my $our_intro = ($op->name =~ /^(gv|rv2)[ash]v$/) ? OPpOUR_INTRO : 0;
1012 if ($op->private & (OPpLVAL_INTRO|$our_intro)
1013 and not $self->{'avoid_local'}{$$op}) {
1014 my $our_local = ($op->private & OPpLVAL_INTRO) ? "local" : "our";
8e3542b6
RB
1015 if( $our_local eq 'our' ) {
1016 die "Unexpected our($text)\n" unless $text =~ /^\W(\w+::)*\w+\z/;
d989cdac 1017 $text =~ s/(\w+::)+//;
8e3542b6 1018 }
e8d3f51b 1019 if (want_scalar($op)) {
ce4e655d 1020 return "$our_local $text";
e8d3f51b 1021 } else {
ce4e655d 1022 return $self->maybe_parens_func("$our_local", $text, $cx, 16);
e8d3f51b 1023 }
6e90668e
SM
1024 } else {
1025 return $text;
a798dbf2 1026 }
a798dbf2
MB
1027}
1028
3ed82cfc
GS
1029sub maybe_targmy {
1030 my $self = shift;
1031 my($op, $cx, $func, @args) = @_;
1032 if ($op->private & OPpTARGET_MY) {
1033 my $var = $self->padname($op->targ);
1034 my $val = $func->($self, $op, 7, @args);
1035 return $self->maybe_parens("$var = $val", $cx, 7);
1036 } else {
1037 return $func->($self, $op, $cx, @args);
1038 }
1039}
1040
6e90668e
SM
1041sub padname_sv {
1042 my $self = shift;
1043 my $targ = shift;
d989cdac 1044 return $self->{'curcv'}->PADLIST->ARRAYelt(0)->ARRAYelt($targ);
6e90668e
SM
1045}
1046
1047sub maybe_my {
1048 my $self = shift;
9d2c6865 1049 my($op, $cx, $text) = @_;
4c1f658f 1050 if ($op->private & OPpLVAL_INTRO and not $self->{'avoid_local'}{$$op}) {
e8d3f51b
RH
1051 if (want_scalar($op)) {
1052 return "my $text";
1053 } else {
1054 return $self->maybe_parens_func("my", $text, $cx, 16);
1055 }
6e90668e
SM
1056 } else {
1057 return $text;
1058 }
1059}
1060
9d2c6865
SM
1061# The following OPs don't have functions:
1062
1063# pp_padany -- does not exist after parsing
9d2c6865 1064
2ae48fff
RGS
1065sub AUTOLOAD {
1066 if ($AUTOLOAD =~ s/^.*::pp_//) {
1067 warn "unexpected OP_".uc $AUTOLOAD;
1068 return "XXX";
1069 } else {
1070 die "Undefined subroutine $AUTOLOAD called";
1071 }
9d2c6865 1072}
6e90668e 1073
611c1e95
IZ
1074sub DESTROY {} # Do not AUTOLOAD
1075
ce4e655d
RH
1076# $root should be the op which represents the root of whatever
1077# we're sequencing here. If it's undefined, then we don't append
1078# any subroutine declarations to the deparsed ops, otherwise we
1079# append appropriate declarations.
58cccf98 1080sub lineseq {
ce4e655d 1081 my($self, $root, @ops) = @_;
58cccf98 1082 my($expr, @exprs);
ce4e655d
RH
1083
1084 my $out_cop = $self->{'curcop'};
1085 my $out_seq = defined($out_cop) ? $out_cop->cop_seq : undef;
1086 my $limit_seq;
1087 if (defined $root) {
1088 $limit_seq = $out_seq;
76df5e8f
DM
1089 my $nseq;
1090 $nseq = $self->find_scope_st($root->sibling) if ${$root->sibling};
ce4e655d
RH
1091 $limit_seq = $nseq if !defined($limit_seq)
1092 or defined($nseq) && $nseq < $limit_seq;
1093 }
1094 $limit_seq = $self->{'limit_seq'}
1095 if defined($self->{'limit_seq'})
1096 && (!defined($limit_seq) || $self->{'limit_seq'} < $limit_seq);
1097 local $self->{'limit_seq'} = $limit_seq;
58cccf98 1098 for (my $i = 0; $i < @ops; $i++) {
6e90668e 1099 $expr = "";
58cccf98
SM
1100 if (is_state $ops[$i]) {
1101 $expr = $self->deparse($ops[$i], 0);
1102 $i++;
e99ebc55
RH
1103 if ($i > $#ops) {
1104 push @exprs, $expr;
1105 last;
1106 }
58cccf98 1107 }
c73811ab
RH
1108 if (!is_state $ops[$i] and (my $ls = $ops[$i+1]) and
1109 !null($ops[$i+1]) and $ops[$i+1]->name eq "lineseq")
58cccf98 1110 {
c73811ab
RH
1111 if ($ls->first && !null($ls->first) && is_state($ls->first)
1112 && (my $sib = $ls->first->sibling)) {
1113 if (!null($sib) && $sib->name eq "leaveloop") {
1114 push @exprs, $expr . $self->for_loop($ops[$i], 0);
1115 $i++;
1116 next;
1117 }
1118 }
6e90668e 1119 }
d989cdac 1120 $expr .= $self->deparse($ops[$i], (@ops != 1)/2);
e99ebc55 1121 $expr =~ s/;\n?\z//;
f99a63a2 1122 push @exprs, $expr;
6e90668e 1123 }
ce4e655d
RH
1124 my $body = join(";\n", grep {length} @exprs);
1125 my $subs = "";
67fc2416 1126 if (defined $root && defined $limit_seq && !$self->{'in_format'}) {
ce4e655d
RH
1127 $subs = join "\n", $self->seq_subs($limit_seq);
1128 }
1129 return join(";\n", grep {length} $body, $subs);
6e90668e
SM
1130}
1131
58cccf98 1132sub scopeop {
d989cdac 1133 my($real_block, $self, $op, $cx) = @_;
58cccf98
SM
1134 my $kid;
1135 my @kids;
a0405c92
RH
1136
1137 local(@$self{qw'curstash warnings hints'})
1138 = @$self{qw'curstash warnings hints'} if $real_block;
58cccf98
SM
1139 if ($real_block) {
1140 $kid = $op->first->sibling; # skip enter
1141 if (is_miniwhile($kid)) {
1142 my $top = $kid->first;
1143 my $name = $top->name;
1144 if ($name eq "and") {
1145 $name = "while";
1146 } elsif ($name eq "or") {
1147 $name = "until";
1148 } else { # no conditional -> while 1 or until 0
1149 return $self->deparse($top->first, 1) . " while 1";
1150 }
1151 my $cond = $top->first;
1152 my $body = $cond->sibling->first; # skip lineseq
1153 $cond = $self->deparse($cond, 1);
1154 $body = $self->deparse($body, 1);
1155 return "$body $name $cond";
6e90668e 1156 }
58cccf98
SM
1157 } else {
1158 $kid = $op->first;
1159 }
1160 for (; !null($kid); $kid = $kid->sibling) {
1161 push @kids, $kid;
6e90668e 1162 }
d989cdac 1163 if ($cx > 0) { # inside an expression, (a do {} while for lineseq)
ce4e655d 1164 return "do {\n\t" . $self->lineseq($op, @kids) . "\n\b}";
9d2c6865 1165 } else {
ce4e655d 1166 my $lineseq = $self->lineseq($op, @kids);
7a9b44b9 1167 return (length ($lineseq) ? "$lineseq;" : "");
6e90668e 1168 }
6e90668e
SM
1169}
1170
ce4e655d 1171sub pp_scope { scopeop(0, @_); }
58cccf98
SM
1172sub pp_lineseq { scopeop(0, @_); }
1173sub pp_leave { scopeop(1, @_); }
9d2c6865 1174
d989cdac
SM
1175# This is a special case of scopeop and lineseq, for the case of the
1176# main_root. The difference is that we print the output statements as
1177# soon as we get them, for the sake of impatient users.
1178sub deparse_root {
1179 my $self = shift;
1180 my($op) = @_;
1181 local(@$self{qw'curstash warnings hints'})
1182 = @$self{qw'curstash warnings hints'};
1183 my @kids;
1184 for (my $kid = $op->first->sibling; !null($kid); $kid = $kid->sibling) {
1185 push @kids, $kid;
1186 }
1187 for (my $i = 0; $i < @kids; $i++) {
1188 my $expr = "";
1189 if (is_state $kids[$i]) {
1190 $expr = $self->deparse($kids[$i], 0);
1191 $i++;
1192 if ($i > $#kids) {
1193 print $self->indent($expr);
1194 last;
1195 }
1196 }
1197 if (is_for_loop($kids[$i])) {
1198 $expr .= $self->for_loop($kids[$i], 0);
1199 $expr .= ";\n" unless $i == $#kids;
1200 print $self->indent($expr);
1201 $i++;
1202 next;
1203 }
1204 $expr .= $self->deparse($kids[$i], (@kids != 1)/2);
1205 $expr =~ s/;\n?\z//;
1206 $expr .= ";";
1207 print $self->indent($expr);
1208 print "\n" unless $i == $#kids;
1209 }
1210}
1211
6e90668e
SM
1212# The BEGIN {} is used here because otherwise this code isn't executed
1213# when you run B::Deparse on itself.
1214my %globalnames;
1215BEGIN { map($globalnames{$_}++, "SIG", "STDIN", "STDOUT", "STDERR", "INC",
1216 "ENV", "ARGV", "ARGVOUT", "_"); }
1217
1218sub gv_name {
1219 my $self = shift;
1220 my $gv = shift;
c6e79e55 1221Carp::confess() unless ref($gv) eq "B::GV";
6e90668e 1222 my $stash = $gv->STASH->NAME;
d9963e60 1223 my $name = $gv->SAFENAME;
5c55e82c
HS
1224 if (($stash eq 'main' && $globalnames{$name})
1225 or ($stash eq $self->{'curstash'} && !$globalnames{$name})
9d2c6865
SM
1226 or $name =~ /^[^A-Za-z_]/)
1227 {
6e90668e
SM
1228 $stash = "";
1229 } else {
1230 $stash = $stash . "::";
a798dbf2 1231 }
083bda02
MS
1232 if ($name =~ /^(\^..|{)/) {
1233 $name = "{$name}"; # ${^WARNING_BITS}, etc and ${
6e90668e
SM
1234 }
1235 return $stash . $name;
a798dbf2
MB
1236}
1237
8510e997
RH
1238# Return the name to use for a stash variable.
1239# If a lexical with the same name is in scope, it may need to be
1240# fully-qualified.
1241sub stash_variable {
1242 my ($self, $prefix, $name) = @_;
1243
1244 return "$prefix$name" if $name =~ /::/;
1245
d989cdac 1246 unless ($prefix eq '$' || $prefix eq '@' || #'
8510e997
RH
1247 $prefix eq '%' || $prefix eq '$#') {
1248 return "$prefix$name";
1249 }
1250
1251 my $v = ($prefix eq '$#' ? '@' : $prefix) . $name;
1252 return $prefix .$self->{'curstash'}.'::'. $name if $self->lex_in_scope($v);
1253 return "$prefix$name";
1254}
1255
1256sub lex_in_scope {
1257 my ($self, $name) = @_;
1258 $self->populate_curcvlex() if !defined $self->{'curcvlex'};
1259
6ec152c3 1260 return 0 if !defined($self->{'curcop'});
8510e997
RH
1261 my $seq = $self->{'curcop'}->cop_seq;
1262 return 0 if !exists $self->{'curcvlex'}{$name};
1263 for my $a (@{$self->{'curcvlex'}{$name}}) {
1264 my ($st, $en) = @$a;
1265 return 1 if $seq > $st && $seq <= $en;
1266 }
1267 return 0;
1268}
1269
1270sub populate_curcvlex {
1271 my $self = shift;
ce4e655d 1272 for (my $cv = $self->{'curcv'}; class($cv) eq "CV"; $cv = $cv->OUTSIDE) {
7dafbf52
DM
1273 my $padlist = $cv->PADLIST;
1274 # an undef CV still in lexical chain
1275 next if class($padlist) eq "SPECIAL";
1276 my @padlist = $padlist->ARRAY;
8510e997
RH
1277 my @ns = $padlist[0]->ARRAY;
1278
1279 for (my $i=0; $i<@ns; ++$i) {
1280 next if class($ns[$i]) eq "SPECIAL";
ce4e655d 1281 next if $ns[$i]->FLAGS & SVpad_OUR; # Skip "our" vars
0f2fe21d
RH
1282 if (class($ns[$i]) eq "PV") {
1283 # Probably that pesky lexical @_
1284 next;
1285 }
8510e997 1286 my $name = $ns[$i]->PVX;
7dafbf52
DM
1287 my ($seq_st, $seq_en) =
1288 ($ns[$i]->FLAGS & SVf_FAKE)
1289 ? (0, 999999)
1290 : ($ns[$i]->NVX, $ns[$i]->IVX);
8510e997
RH
1291
1292 push @{$self->{'curcvlex'}{$name}}, [$seq_st, $seq_en];
1293 }
1294 }
1295}
1296
ce4e655d
RH
1297sub find_scope_st { ((find_scope(@_))[0]); }
1298sub find_scope_en { ((find_scope(@_))[1]); }
1299
1300# Recurses down the tree, looking for pad variable introductions and COPs
1301sub find_scope {
1302 my ($self, $op, $scope_st, $scope_en) = @_;
ff97752d 1303 carp("Undefined op in find_scope") if !defined $op;
ce4e655d
RH
1304 return ($scope_st, $scope_en) unless $op->flags & OPf_KIDS;
1305
1306 for (my $o=$op->first; $$o; $o=$o->sibling) {
1307 if ($o->name =~ /^pad.v$/ && $o->private & OPpLVAL_INTRO) {
1308 my $s = int($self->padname_sv($o->targ)->NVX);
1309 my $e = $self->padname_sv($o->targ)->IVX;
1310 $scope_st = $s if !defined($scope_st) || $s < $scope_st;
1311 $scope_en = $e if !defined($scope_en) || $e > $scope_en;
1312 }
1313 elsif (is_state($o)) {
1314 my $c = $o->cop_seq;
1315 $scope_st = $c if !defined($scope_st) || $c < $scope_st;
1316 $scope_en = $c if !defined($scope_en) || $c > $scope_en;
1317 }
1318 elsif ($o->flags & OPf_KIDS) {
1319 ($scope_st, $scope_en) =
1320 $self->find_scope($o, $scope_st, $scope_en)
34a48b4b
RH
1321 }
1322 }
ce4e655d
RH
1323
1324 return ($scope_st, $scope_en);
34a48b4b
RH
1325}
1326
1327# Returns a list of subs which should be inserted before the COP
1328sub cop_subs {
1329 my ($self, $op, $out_seq) = @_;
1330 my $seq = $op->cop_seq;
1331 # If we have nephews, then our sequence number indicates
1332 # the cop_seq of the end of some sort of scope.
1333 if (class($op->sibling) ne "NULL" && $op->sibling->flags & OPf_KIDS
ce4e655d
RH
1334 and my $nseq = $self->find_scope_st($op->sibling) ) {
1335 $seq = $nseq;
34a48b4b
RH
1336 }
1337 $seq = $out_seq if defined($out_seq) && $out_seq < $seq;
1338 return $self->seq_subs($seq);
1339}
1340
1341sub seq_subs {
1342 my ($self, $seq) = @_;
1343 my @text;
1344#push @text, "# ($seq)\n";
1345
ce4e655d 1346 return "" if !defined $seq;
34a48b4b
RH
1347 while (scalar(@{$self->{'subs_todo'}})
1348 and $seq > $self->{'subs_todo'}[0][0]) {
1349 push @text, $self->next_todo;
1350 }
1351 return @text;
1352}
1353
08c6f5ec 1354# Notice how subs and formats are inserted between statements here;
a0405c92 1355# also $[ assignments and pragmas.
6e90668e
SM
1356sub pp_nextstate {
1357 my $self = shift;
9d2c6865 1358 my($op, $cx) = @_;
34a48b4b 1359 $self->{'curcop'} = $op;
6e90668e 1360 my @text;
34a48b4b 1361 push @text, $self->cop_subs($op);
e99ebc55 1362 push @text, $op->label . ": " if $op->label;
11faa288 1363 my $stash = $op->stashpv;
6e90668e
SM
1364 if ($stash ne $self->{'curstash'}) {
1365 push @text, "package $stash;\n";
1366 $self->{'curstash'} = $stash;
1367 }
08c6f5ec 1368
7a9b44b9
RH
1369 if ($self->{'arybase'} != $op->arybase) {
1370 push @text, '$[ = '. $op->arybase .";\n";
1371 $self->{'arybase'} = $op->arybase;
1372 }
1373
1374 my $warnings = $op->warnings;
1375 my $warning_bits;
1376 if ($warnings->isa("B::SPECIAL") && $$warnings == 4) {
810aef70 1377 $warning_bits = $warnings::Bits{"all"} & WARN_MASK;
7a9b44b9 1378 }
e31885a0 1379 elsif ($warnings->isa("B::SPECIAL") && $$warnings == 5) {
810aef70 1380 $warning_bits = $warnings::NONE;
7a9b44b9 1381 }
e31885a0
RH
1382 elsif ($warnings->isa("B::SPECIAL")) {
1383 $warning_bits = undef;
1384 }
7a9b44b9 1385 else {
34a48b4b 1386 $warning_bits = $warnings->PV & WARN_MASK;
7a9b44b9
RH
1387 }
1388
e31885a0
RH
1389 if (defined ($warning_bits) and
1390 !defined($self->{warnings}) || $self->{'warnings'} ne $warning_bits) {
08c6f5ec 1391 push @text, declare_warnings($self->{'warnings'}, $warning_bits);
7a9b44b9
RH
1392 $self->{'warnings'} = $warning_bits;
1393 }
1394
a0405c92
RH
1395 if ($self->{'hints'} != $op->private) {
1396 push @text, declare_hints($self->{'hints'}, $op->private);
1397 $self->{'hints'} = $op->private;
1398 }
1399
d989cdac
SM
1400 # This should go after of any branches that add statements, to
1401 # increase the chances that it refers to the same line it did in
1402 # the original program.
1403 if ($self->{'linenums'}) {
1404 push @text, "\f#line " . $op->line .
1405 ' "' . $op->file, qq'"\n';
1406 }
1407
6e90668e
SM
1408 return join("", @text);
1409}
1410
08c6f5ec
RH
1411sub declare_warnings {
1412 my ($from, $to) = @_;
6ec152c3 1413 if (($to & WARN_MASK) eq warnings::bits("all")) {
a0405c92
RH
1414 return "use warnings;\n";
1415 }
6ec152c3 1416 elsif (($to & WARN_MASK) eq "\0"x length($to)) {
a0405c92
RH
1417 return "no warnings;\n";
1418 }
51a5edaf 1419 return "BEGIN {\${^WARNING_BITS} = ".perlstring($to)."}\n";
a0405c92
RH
1420}
1421
1422sub declare_hints {
1423 my ($from, $to) = @_;
a0035eb8
RH
1424 my $use = $to & ~$from;
1425 my $no = $from & ~$to;
1426 my $decls = "";
1427 for my $pragma (hint_pragmas($use)) {
1428 $decls .= "use $pragma;\n";
1429 }
1430 for my $pragma (hint_pragmas($no)) {
1431 $decls .= "no $pragma;\n";
1432 }
1433 return $decls;
1434}
1435
1436sub hint_pragmas {
1437 my ($bits) = @_;
1438 my @pragmas;
1439 push @pragmas, "integer" if $bits & 0x1;
1440 push @pragmas, "strict 'refs'" if $bits & 0x2;
1441 push @pragmas, "bytes" if $bits & 0x8;
1442 return @pragmas;
08c6f5ec
RH
1443}
1444
6e90668e 1445sub pp_dbstate { pp_nextstate(@_) }
3f872cb9 1446sub pp_setstate { pp_nextstate(@_) }
6e90668e
SM
1447
1448sub pp_unstack { return "" } # see also leaveloop
1449
1450sub baseop {
1451 my $self = shift;
9d2c6865 1452 my($op, $cx, $name) = @_;
6e90668e
SM
1453 return $name;
1454}
1455
e99ebc55
RH
1456sub pp_stub {
1457 my $self = shift;
1458 my($op, $cx, $name) = @_;
d989cdac 1459 if ($cx >= 1) {
e99ebc55
RH
1460 return "()";
1461 }
1462 else {
1463 return "();";
1464 }
1465}
6e90668e
SM
1466sub pp_wantarray { baseop(@_, "wantarray") }
1467sub pp_fork { baseop(@_, "fork") }
3ed82cfc
GS
1468sub pp_wait { maybe_targmy(@_, \&baseop, "wait") }
1469sub pp_getppid { maybe_targmy(@_, \&baseop, "getppid") }
1470sub pp_time { maybe_targmy(@_, \&baseop, "time") }
6e90668e
SM
1471sub pp_tms { baseop(@_, "times") }
1472sub pp_ghostent { baseop(@_, "gethostent") }
1473sub pp_gnetent { baseop(@_, "getnetent") }
1474sub pp_gprotoent { baseop(@_, "getprotoent") }
1475sub pp_gservent { baseop(@_, "getservent") }
1476sub pp_ehostent { baseop(@_, "endhostent") }
1477sub pp_enetent { baseop(@_, "endnetent") }
1478sub pp_eprotoent { baseop(@_, "endprotoent") }
1479sub pp_eservent { baseop(@_, "endservent") }
1480sub pp_gpwent { baseop(@_, "getpwent") }
1481sub pp_spwent { baseop(@_, "setpwent") }
1482sub pp_epwent { baseop(@_, "endpwent") }
1483sub pp_ggrent { baseop(@_, "getgrent") }
1484sub pp_sgrent { baseop(@_, "setgrent") }
1485sub pp_egrent { baseop(@_, "endgrent") }
1486sub pp_getlogin { baseop(@_, "getlogin") }
1487
1488sub POSTFIX () { 1 }
1489
9d2c6865
SM
1490# I couldn't think of a good short name, but this is the category of
1491# symbolic unary operators with interesting precedence
1492
1493sub pfixop {
1494 my $self = shift;
1495 my($op, $cx, $name, $prec, $flags) = (@_, 0);
1496 my $kid = $op->first;
1497 $kid = $self->deparse($kid, $prec);
1498 return $self->maybe_parens(($flags & POSTFIX) ? "$kid$name" : "$name$kid",
1499 $cx, $prec);
1500}
1501
1502sub pp_preinc { pfixop(@_, "++", 23) }
1503sub pp_predec { pfixop(@_, "--", 23) }
3ed82cfc
GS
1504sub pp_postinc { maybe_targmy(@_, \&pfixop, "++", 23, POSTFIX) }
1505sub pp_postdec { maybe_targmy(@_, \&pfixop, "--", 23, POSTFIX) }
9d2c6865
SM
1506sub pp_i_preinc { pfixop(@_, "++", 23) }
1507sub pp_i_predec { pfixop(@_, "--", 23) }
3ed82cfc
GS
1508sub pp_i_postinc { maybe_targmy(@_, \&pfixop, "++", 23, POSTFIX) }
1509sub pp_i_postdec { maybe_targmy(@_, \&pfixop, "--", 23, POSTFIX) }
68cc8748 1510sub pp_complement { maybe_targmy(@_, \&pfixop, "~", 21) }
9d2c6865 1511
3ed82cfc
GS
1512sub pp_negate { maybe_targmy(@_, \&real_negate) }
1513sub real_negate {
9d2c6865
SM
1514 my $self = shift;
1515 my($op, $cx) = @_;
3f872cb9 1516 if ($op->first->name =~ /^(i_)?negate$/) {
9d2c6865
SM
1517 # avoid --$x
1518 $self->pfixop($op, $cx, "-", 21.5);
1519 } else {
1520 $self->pfixop($op, $cx, "-", 21);
1521 }
1522}
1523sub pp_i_negate { pp_negate(@_) }
1524
1525sub pp_not {
1526 my $self = shift;
1527 my($op, $cx) = @_;
1528 if ($cx <= 4) {
1529 $self->pfixop($op, $cx, "not ", 4);
1530 } else {
1531 $self->pfixop($op, $cx, "!", 21);
1532 }
1533}
1534
6e90668e
SM
1535sub unop {
1536 my $self = shift;
f4a44678 1537 my($op, $cx, $name) = @_;
6e90668e 1538 my $kid;
9d2c6865 1539 if ($op->flags & OPf_KIDS) {
6e90668e 1540 $kid = $op->first;
d989cdac 1541 if (defined prototype("CORE::$name")
e31885a0
RH
1542 && prototype("CORE::$name") =~ /^;?\*/
1543 && $kid->name eq "rv2gv") {
1544 $kid = $kid->first;
1545 }
1546
9d2c6865 1547 return $self->maybe_parens_unop($name, $kid, $cx);
6e90668e 1548 } else {
d989cdac 1549 return $name . ($op->flags & OPf_SPECIAL ? "()" : "");
6e90668e 1550 }
6e90668e
SM
1551}
1552
3ed82cfc
GS
1553sub pp_chop { maybe_targmy(@_, \&unop, "chop") }
1554sub pp_chomp { maybe_targmy(@_, \&unop, "chomp") }
1555sub pp_schop { maybe_targmy(@_, \&unop, "chop") }
1556sub pp_schomp { maybe_targmy(@_, \&unop, "chomp") }
6e90668e
SM
1557sub pp_defined { unop(@_, "defined") }
1558sub pp_undef { unop(@_, "undef") }
1559sub pp_study { unop(@_, "study") }
6e90668e
SM
1560sub pp_ref { unop(@_, "ref") }
1561sub pp_pos { maybe_local(@_, unop(@_, "pos")) }
1562
3ed82cfc
GS
1563sub pp_sin { maybe_targmy(@_, \&unop, "sin") }
1564sub pp_cos { maybe_targmy(@_, \&unop, "cos") }
1565sub pp_rand { maybe_targmy(@_, \&unop, "rand") }
6e90668e 1566sub pp_srand { unop(@_, "srand") }
3ed82cfc
GS
1567sub pp_exp { maybe_targmy(@_, \&unop, "exp") }
1568sub pp_log { maybe_targmy(@_, \&unop, "log") }
1569sub pp_sqrt { maybe_targmy(@_, \&unop, "sqrt") }
1570sub pp_int { maybe_targmy(@_, \&unop, "int") }
1571sub pp_hex { maybe_targmy(@_, \&unop, "hex") }
1572sub pp_oct { maybe_targmy(@_, \&unop, "oct") }
1573sub pp_abs { maybe_targmy(@_, \&unop, "abs") }
1574
1575sub pp_length { maybe_targmy(@_, \&unop, "length") }
1576sub pp_ord { maybe_targmy(@_, \&unop, "ord") }
1577sub pp_chr { maybe_targmy(@_, \&unop, "chr") }
6e90668e
SM
1578
1579sub pp_each { unop(@_, "each") }
1580sub pp_values { unop(@_, "values") }
1581sub pp_keys { unop(@_, "keys") }
1582sub pp_pop { unop(@_, "pop") }
1583sub pp_shift { unop(@_, "shift") }
1584
1585sub pp_caller { unop(@_, "caller") }
1586sub pp_reset { unop(@_, "reset") }
1587sub pp_exit { unop(@_, "exit") }
1588sub pp_prototype { unop(@_, "prototype") }
1589
1590sub pp_close { unop(@_, "close") }
1591sub pp_fileno { unop(@_, "fileno") }
1592sub pp_umask { unop(@_, "umask") }
6e90668e
SM
1593sub pp_untie { unop(@_, "untie") }
1594sub pp_tied { unop(@_, "tied") }
1595sub pp_dbmclose { unop(@_, "dbmclose") }
1596sub pp_getc { unop(@_, "getc") }
1597sub pp_eof { unop(@_, "eof") }
1598sub pp_tell { unop(@_, "tell") }
1599sub pp_getsockname { unop(@_, "getsockname") }
1600sub pp_getpeername { unop(@_, "getpeername") }
1601
3ed82cfc
GS
1602sub pp_chdir { maybe_targmy(@_, \&unop, "chdir") }
1603sub pp_chroot { maybe_targmy(@_, \&unop, "chroot") }
6e90668e 1604sub pp_readlink { unop(@_, "readlink") }
3ed82cfc 1605sub pp_rmdir { maybe_targmy(@_, \&unop, "rmdir") }
6e90668e
SM
1606sub pp_readdir { unop(@_, "readdir") }
1607sub pp_telldir { unop(@_, "telldir") }
1608sub pp_rewinddir { unop(@_, "rewinddir") }
1609sub pp_closedir { unop(@_, "closedir") }
3ed82cfc 1610sub pp_getpgrp { maybe_targmy(@_, \&unop, "getpgrp") }
6e90668e
SM
1611sub pp_localtime { unop(@_, "localtime") }
1612sub pp_gmtime { unop(@_, "gmtime") }
1613sub pp_alarm { unop(@_, "alarm") }
3ed82cfc 1614sub pp_sleep { maybe_targmy(@_, \&unop, "sleep") }
6e90668e
SM
1615
1616sub pp_dofile { unop(@_, "do") }
1617sub pp_entereval { unop(@_, "eval") }
1618
1619sub pp_ghbyname { unop(@_, "gethostbyname") }
1620sub pp_gnbyname { unop(@_, "getnetbyname") }
1621sub pp_gpbyname { unop(@_, "getprotobyname") }
1622sub pp_shostent { unop(@_, "sethostent") }
1623sub pp_snetent { unop(@_, "setnetent") }
1624sub pp_sprotoent { unop(@_, "setprotoent") }
1625sub pp_sservent { unop(@_, "setservent") }
1626sub pp_gpwnam { unop(@_, "getpwnam") }
1627sub pp_gpwuid { unop(@_, "getpwuid") }
1628sub pp_ggrnam { unop(@_, "getgrnam") }
1629sub pp_ggrgid { unop(@_, "getgrgid") }
1630
1631sub pp_lock { unop(@_, "lock") }
1632
1633sub pp_exists {
1634 my $self = shift;
9d2c6865 1635 my($op, $cx) = @_;
34a48b4b
RH
1636 my $arg;
1637 if ($op->private & OPpEXISTS_SUB) {
1638 # Checking for the existence of a subroutine
1639 return $self->maybe_parens_func("exists",
1640 $self->pp_rv2cv($op->first, 16), $cx, 16);
1641 }
1642 if ($op->flags & OPf_SPECIAL) {
1643 # Array element, not hash element
1644 return $self->maybe_parens_func("exists",
1645 $self->pp_aelem($op->first, 16), $cx, 16);
1646 }
9d2c6865
SM
1647 return $self->maybe_parens_func("exists", $self->pp_helem($op->first, 16),
1648 $cx, 16);
6e90668e
SM
1649}
1650
6e90668e
SM
1651sub pp_delete {
1652 my $self = shift;
9d2c6865 1653 my($op, $cx) = @_;
6e90668e
SM
1654 my $arg;
1655 if ($op->private & OPpSLICE) {
34a48b4b
RH
1656 if ($op->flags & OPf_SPECIAL) {
1657 # Deleting from an array, not a hash
1658 return $self->maybe_parens_func("delete",
1659 $self->pp_aslice($op->first, 16),
1660 $cx, 16);
1661 }
9d2c6865
SM
1662 return $self->maybe_parens_func("delete",
1663 $self->pp_hslice($op->first, 16),
1664 $cx, 16);
6e90668e 1665 } else {
34a48b4b
RH
1666 if ($op->flags & OPf_SPECIAL) {
1667 # Deleting from an array, not a hash
1668 return $self->maybe_parens_func("delete",
1669 $self->pp_aelem($op->first, 16),
1670 $cx, 16);
1671 }
9d2c6865
SM
1672 return $self->maybe_parens_func("delete",
1673 $self->pp_helem($op->first, 16),
1674 $cx, 16);
6e90668e 1675 }
6e90668e
SM
1676}
1677
6e90668e
SM
1678sub pp_require {
1679 my $self = shift;
9d2c6865 1680 my($op, $cx) = @_;
3f872cb9 1681 if (class($op) eq "UNOP" and $op->first->name eq "const"
4c1f658f 1682 and $op->first->private & OPpCONST_BARE)
6e90668e 1683 {
18228111 1684 my $name = $self->const_sv($op->first)->PV;
6e90668e
SM
1685 $name =~ s[/][::]g;
1686 $name =~ s/\.pm//g;
34a48b4b 1687 return "require $name";
6e90668e 1688 } else {
9d2c6865 1689 $self->unop($op, $cx, "require");
6e90668e
SM
1690 }
1691}
1692
d989cdac 1693sub pp_scalar {
9d2c6865
SM
1694 my $self = shift;
1695 my($op, $cv) = @_;
1696 my $kid = $op->first;
1697 if (not null $kid->sibling) {
1698 # XXX Was a here-doc
1699 return $self->dquote($op);
1700 }
1701 $self->unop(@_, "scalar");
1702}
1703
1704
6e90668e
SM
1705sub padval {
1706 my $self = shift;
1707 my $targ = shift;
d989cdac 1708 return $self->{'curcv'}->PADLIST->ARRAYelt(1)->ARRAYelt($targ);
6e90668e
SM
1709}
1710
1711sub pp_refgen {
1712 my $self = shift;
9d2c6865 1713 my($op, $cx) = @_;
6e90668e 1714 my $kid = $op->first;
3f872cb9 1715 if ($kid->name eq "null") {
6e90668e 1716 $kid = $kid->first;
3f872cb9
GS
1717 if ($kid->name eq "anonlist" || $kid->name eq "anonhash") {
1718 my($pre, $post) = @{{"anonlist" => ["[","]"],
1719 "anonhash" => ["{","}"]}->{$kid->name}};
6e90668e
SM
1720 my($expr, @exprs);
1721 $kid = $kid->first->sibling; # skip pushmark
1722 for (; !null($kid); $kid = $kid->sibling) {
9d2c6865 1723 $expr = $self->deparse($kid, 6);
6e90668e
SM
1724 push @exprs, $expr;
1725 }
1726 return $pre . join(", ", @exprs) . $post;
d989cdac 1727 } elsif (!null($kid->sibling) and
3f872cb9 1728 $kid->sibling->name eq "anoncode") {
6e90668e
SM
1729 return "sub " .
1730 $self->deparse_sub($self->padval($kid->sibling->targ));
3f872cb9
GS
1731 } elsif ($kid->name eq "pushmark") {
1732 my $sib_name = $kid->sibling->name;
1733 if ($sib_name =~ /^(pad|rv2)[ah]v$/
c8c62db7
AD
1734 and not $kid->sibling->flags & OPf_REF)
1735 {
1736 # The @a in \(@a) isn't in ref context, but only when the
1737 # parens are there.
127212b2 1738 return "\\(" . $self->pp_list($op->first) . ")";
3f872cb9 1739 } elsif ($sib_name eq 'entersub') {
c8c62db7
AD
1740 my $text = $self->deparse($kid->sibling, 1);
1741 # Always show parens for \(&func()), but only with -p otherwise
1742 $text = "($text)" if $self->{'parens'}
1743 or $kid->sibling->private & OPpENTERSUB_AMPER;
1744 return "\\$text";
1745 }
1746 }
6e90668e 1747 }
9d2c6865 1748 $self->pfixop($op, $cx, "\\", 20);
6e90668e
SM
1749}
1750
1751sub pp_srefgen { pp_refgen(@_) }
1752
1753sub pp_readline {
1754 my $self = shift;
9d2c6865 1755 my($op, $cx) = @_;
6e90668e 1756 my $kid = $op->first;
3f872cb9 1757 $kid = $kid->first if $kid->name eq "rv2gv"; # <$fh>
e31885a0
RH
1758 return "<" . $self->deparse($kid, 1) . ">" if is_scalar($kid);
1759 return $self->unop($op, $cx, "readline");
6e90668e
SM
1760}
1761
ad8caead
RGS
1762sub pp_rcatline {
1763 my $self = shift;
1764 my($op) = @_;
d989cdac 1765 return "<" . $self->gv_name($self->gv_or_padgv($op)) . ">";
ad8caead
RGS
1766}
1767
bd0865ec
GS
1768# Unary operators that can occur as pseudo-listops inside double quotes
1769sub dq_unop {
1770 my $self = shift;
1771 my($op, $cx, $name, $prec, $flags) = (@_, 0, 0);
1772 my $kid;
1773 if ($op->flags & OPf_KIDS) {
1774 $kid = $op->first;
1775 # If there's more than one kid, the first is an ex-pushmark.
1776 $kid = $kid->sibling if not null $kid->sibling;
1777 return $self->maybe_parens_unop($name, $kid, $cx);
1778 } else {
d989cdac 1779 return $name . ($op->flags & OPf_SPECIAL ? "()" : "");
bd0865ec
GS
1780 }
1781}
1782
1783sub pp_ucfirst { dq_unop(@_, "ucfirst") }
1784sub pp_lcfirst { dq_unop(@_, "lcfirst") }
1785sub pp_uc { dq_unop(@_, "uc") }
1786sub pp_lc { dq_unop(@_, "lc") }
3ed82cfc 1787sub pp_quotemeta { maybe_targmy(@_, \&dq_unop, "quotemeta") }
bd0865ec 1788
6e90668e
SM
1789sub loopex {
1790 my $self = shift;
9d2c6865 1791 my ($op, $cx, $name) = @_;
6e90668e 1792 if (class($op) eq "PVOP") {
9d2c6865
SM
1793 return "$name " . $op->pv;
1794 } elsif (class($op) eq "OP") {
1795 return $name;
6e90668e 1796 } elsif (class($op) eq "UNOP") {
9d2c6865
SM
1797 # Note -- loop exits are actually exempt from the
1798 # looks-like-a-func rule, but a few extra parens won't hurt
1799 return $self->maybe_parens_unop($name, $op->first, $cx);
6e90668e 1800 }
6e90668e
SM
1801}
1802
1803sub pp_last { loopex(@_, "last") }
1804sub pp_next { loopex(@_, "next") }
1805sub pp_redo { loopex(@_, "redo") }
1806sub pp_goto { loopex(@_, "goto") }
1807sub pp_dump { loopex(@_, "dump") }
1808
1809sub ftst {
1810 my $self = shift;
9d2c6865 1811 my($op, $cx, $name) = @_;
6e90668e 1812 if (class($op) eq "UNOP") {
9d2c6865
SM
1813 # Genuine `-X' filetests are exempt from the LLAFR, but not
1814 # l?stat(); for the sake of clarity, give'em all parens
1815 return $self->maybe_parens_unop($name, $op->first, $cx);
d989cdac 1816 } elsif (class($op) =~ /^(SV|PAD)OP$/) {
9d2c6865 1817 return $self->maybe_parens_func($name, $self->pp_gv($op, 1), $cx, 16);
6e90668e 1818 } else { # I don't think baseop filetests ever survive ck_ftst, but...
9d2c6865 1819 return $name;
6e90668e 1820 }
6e90668e
SM
1821}
1822
d989cdac
SM
1823sub pp_lstat { ftst(@_, "lstat") }
1824sub pp_stat { ftst(@_, "stat") }
1825sub pp_ftrread { ftst(@_, "-R") }
6e90668e 1826sub pp_ftrwrite { ftst(@_, "-W") }
d989cdac
SM
1827sub pp_ftrexec { ftst(@_, "-X") }
1828sub pp_fteread { ftst(@_, "-r") }
e31885a0 1829sub pp_ftewrite { ftst(@_, "-w") }
d989cdac
SM
1830sub pp_fteexec { ftst(@_, "-x") }
1831sub pp_ftis { ftst(@_, "-e") }
6e90668e
SM
1832sub pp_fteowned { ftst(@_, "-O") }
1833sub pp_ftrowned { ftst(@_, "-o") }
d989cdac
SM
1834sub pp_ftzero { ftst(@_, "-z") }
1835sub pp_ftsize { ftst(@_, "-s") }
1836sub pp_ftmtime { ftst(@_, "-M") }
1837sub pp_ftatime { ftst(@_, "-A") }
1838sub pp_ftctime { ftst(@_, "-C") }
1839sub pp_ftsock { ftst(@_, "-S") }
1840sub pp_ftchr { ftst(@_, "-c") }
1841sub pp_ftblk { ftst(@_, "-b") }
1842sub pp_ftfile { ftst(@_, "-f") }
1843sub pp_ftdir { ftst(@_, "-d") }
1844sub pp_ftpipe { ftst(@_, "-p") }
1845sub pp_ftlink { ftst(@_, "-l") }
1846sub pp_ftsuid { ftst(@_, "-u") }
1847sub pp_ftsgid { ftst(@_, "-g") }
1848sub pp_ftsvtx { ftst(@_, "-k") }
1849sub pp_fttty { ftst(@_, "-t") }
1850sub pp_fttext { ftst(@_, "-T") }
6e90668e
SM
1851sub pp_ftbinary { ftst(@_, "-B") }
1852
a798dbf2 1853sub SWAP_CHILDREN () { 1 }
6e90668e 1854sub ASSIGN () { 2 } # has OP= variant
7013e6ae 1855sub LIST_CONTEXT () { 4 } # Assignment is in list context
6e90668e 1856
9d2c6865
SM
1857my(%left, %right);
1858
1859sub assoc_class {
1860 my $op = shift;
3f872cb9
GS
1861 my $name = $op->name;
1862 if ($name eq "concat" and $op->first->name eq "concat") {
9d2c6865 1863 # avoid spurious `=' -- see comment in pp_concat
3f872cb9 1864 return "concat";
9d2c6865 1865 }
3f872cb9
GS
1866 if ($name eq "null" and class($op) eq "UNOP"
1867 and $op->first->name =~ /^(and|x?or)$/
9d2c6865
SM
1868 and null $op->first->sibling)
1869 {
1870 # Like all conditional constructs, OP_ANDs and OP_ORs are topped
1871 # with a null that's used as the common end point of the two
1872 # flows of control. For precedence purposes, ignore it.
1873 # (COND_EXPRs have these too, but we don't bother with
1874 # their associativity).
1875 return assoc_class($op->first);
1876 }
1877 return $name . ($op->flags & OPf_STACKED ? "=" : "");
1878}
1879
1880# Left associative operators, like `+', for which
1881# $a + $b + $c is equivalent to ($a + $b) + $c
1882
1883BEGIN {
3f872cb9
GS
1884 %left = ('multiply' => 19, 'i_multiply' => 19,
1885 'divide' => 19, 'i_divide' => 19,
1886 'modulo' => 19, 'i_modulo' => 19,
1887 'repeat' => 19,
1888 'add' => 18, 'i_add' => 18,
1889 'subtract' => 18, 'i_subtract' => 18,
1890 'concat' => 18,
1891 'left_shift' => 17, 'right_shift' => 17,
1892 'bit_and' => 13,
1893 'bit_or' => 12, 'bit_xor' => 12,
1894 'and' => 3,
1895 'or' => 2, 'xor' => 2,
9d2c6865
SM
1896 );
1897}
1898
1899sub deparse_binop_left {
1900 my $self = shift;
1901 my($op, $left, $prec) = @_;
58231d39 1902 if ($left{assoc_class($op)} && $left{assoc_class($left)}
9d2c6865
SM
1903 and $left{assoc_class($op)} == $left{assoc_class($left)})
1904 {
1905 return $self->deparse($left, $prec - .00001);
1906 } else {
1907 return $self->deparse($left, $prec);
1908 }
1909}
1910
1911# Right associative operators, like `=', for which
1912# $a = $b = $c is equivalent to $a = ($b = $c)
1913
1914BEGIN {
3f872cb9
GS
1915 %right = ('pow' => 22,
1916 'sassign=' => 7, 'aassign=' => 7,
1917 'multiply=' => 7, 'i_multiply=' => 7,
1918 'divide=' => 7, 'i_divide=' => 7,
1919 'modulo=' => 7, 'i_modulo=' => 7,
1920 'repeat=' => 7,
1921 'add=' => 7, 'i_add=' => 7,
1922 'subtract=' => 7, 'i_subtract=' => 7,
1923 'concat=' => 7,
1924 'left_shift=' => 7, 'right_shift=' => 7,
1925 'bit_and=' => 7,
1926 'bit_or=' => 7, 'bit_xor=' => 7,
1927 'andassign' => 7,
1928 'orassign' => 7,
9d2c6865
SM
1929 );
1930}
1931
1932sub deparse_binop_right {
1933 my $self = shift;
1934 my($op, $right, $prec) = @_;
58231d39 1935 if ($right{assoc_class($op)} && $right{assoc_class($right)}
9d2c6865
SM
1936 and $right{assoc_class($op)} == $right{assoc_class($right)})
1937 {
1938 return $self->deparse($right, $prec - .00001);
1939 } else {
1940 return $self->deparse($right, $prec);
1941 }
1942}
1943
a798dbf2 1944sub binop {
6e90668e 1945 my $self = shift;
9d2c6865 1946 my ($op, $cx, $opname, $prec, $flags) = (@_, 0);
a798dbf2
MB
1947 my $left = $op->first;
1948 my $right = $op->last;
9d2c6865
SM
1949 my $eq = "";
1950 if ($op->flags & OPf_STACKED && $flags & ASSIGN) {
1951 $eq = "=";
1952 $prec = 7;
1953 }
a798dbf2
MB
1954 if ($flags & SWAP_CHILDREN) {
1955 ($left, $right) = ($right, $left);
1956 }
9d2c6865 1957 $left = $self->deparse_binop_left($op, $left, $prec);
90c0eb26
RH
1958 $left = "($left)" if $flags & LIST_CONTEXT
1959 && $left !~ /^(my|our|local|)[\@\(]/;
9d2c6865
SM
1960 $right = $self->deparse_binop_right($op, $right, $prec);
1961 return $self->maybe_parens("$left $opname$eq $right", $cx, $prec);
1962}
1963
3ed82cfc
GS
1964sub pp_add { maybe_targmy(@_, \&binop, "+", 18, ASSIGN) }
1965sub pp_multiply { maybe_targmy(@_, \&binop, "*", 19, ASSIGN) }
1966sub pp_subtract { maybe_targmy(@_, \&binop, "-",18, ASSIGN) }
1967sub pp_divide { maybe_targmy(@_, \&binop, "/", 19, ASSIGN) }
1968sub pp_modulo { maybe_targmy(@_, \&binop, "%", 19, ASSIGN) }
1969sub pp_i_add { maybe_targmy(@_, \&binop, "+", 18, ASSIGN) }
1970sub pp_i_multiply { maybe_targmy(@_, \&binop, "*", 19, ASSIGN) }
1971sub pp_i_subtract { maybe_targmy(@_, \&binop, "-", 18, ASSIGN) }
1972sub pp_i_divide { maybe_targmy(@_, \&binop, "/", 19, ASSIGN) }
1973sub pp_i_modulo { maybe_targmy(@_, \&binop, "%", 19, ASSIGN) }
1974sub pp_pow { maybe_targmy(@_, \&binop, "**", 22, ASSIGN) }
1975
1976sub pp_left_shift { maybe_targmy(@_, \&binop, "<<", 17, ASSIGN) }
1977sub pp_right_shift { maybe_targmy(@_, \&binop, ">>", 17, ASSIGN) }
1978sub pp_bit_and { maybe_targmy(@_, \&binop, "&", 13, ASSIGN) }
1979sub pp_bit_or { maybe_targmy(@_, \&binop, "|", 12, ASSIGN) }
1980sub pp_bit_xor { maybe_targmy(@_, \&binop, "^", 12, ASSIGN) }
9d2c6865
SM
1981
1982sub pp_eq { binop(@_, "==", 14) }
1983sub pp_ne { binop(@_, "!=", 14) }
1984sub pp_lt { binop(@_, "<", 15) }
1985sub pp_gt { binop(@_, ">", 15) }
1986sub pp_ge { binop(@_, ">=", 15) }
1987sub pp_le { binop(@_, "<=", 15) }
1988sub pp_ncmp { binop(@_, "<=>", 14) }
1989sub pp_i_eq { binop(@_, "==", 14) }
1990sub pp_i_ne { binop(@_, "!=", 14) }
1991sub pp_i_lt { binop(@_, "<", 15) }
1992sub pp_i_gt { binop(@_, ">", 15) }
1993sub pp_i_ge { binop(@_, ">=", 15) }
1994sub pp_i_le { binop(@_, "<=", 15) }
1995sub pp_i_ncmp { binop(@_, "<=>", 14) }
1996
1997sub pp_seq { binop(@_, "eq", 14) }
1998sub pp_sne { binop(@_, "ne", 14) }
1999sub pp_slt { binop(@_, "lt", 15) }
2000sub pp_sgt { binop(@_, "gt", 15) }
2001sub pp_sge { binop(@_, "ge", 15) }
2002sub pp_sle { binop(@_, "le", 15) }
2003sub pp_scmp { binop(@_, "cmp", 14) }
2004
2005sub pp_sassign { binop(@_, "=", 7, SWAP_CHILDREN) }
7013e6ae 2006sub pp_aassign { binop(@_, "=", 7, SWAP_CHILDREN | LIST_CONTEXT) }
6e90668e
SM
2007
2008# `.' is special because concats-of-concats are optimized to save copying
2009# by making all but the first concat stacked. The effect is as if the
2010# programmer had written `($a . $b) .= $c', except legal.
3ed82cfc
GS
2011sub pp_concat { maybe_targmy(@_, \&real_concat) }
2012sub real_concat {
6e90668e 2013 my $self = shift;
9d2c6865 2014 my($op, $cx) = @_;
6e90668e
SM
2015 my $left = $op->first;
2016 my $right = $op->last;
2017 my $eq = "";
9d2c6865 2018 my $prec = 18;
3f872cb9 2019 if ($op->flags & OPf_STACKED and $op->first->name ne "concat") {
6e90668e 2020 $eq = "=";
9d2c6865 2021 $prec = 7;
6e90668e 2022 }
9d2c6865
SM
2023 $left = $self->deparse_binop_left($op, $left, $prec);
2024 $right = $self->deparse_binop_right($op, $right, $prec);
2025 return $self->maybe_parens("$left .$eq $right", $cx, $prec);
6e90668e
SM
2026}
2027
2028# `x' is weird when the left arg is a list
2029sub pp_repeat {
2030 my $self = shift;
9d2c6865 2031 my($op, $cx) = @_;
6e90668e
SM
2032 my $left = $op->first;
2033 my $right = $op->last;
9d2c6865
SM
2034 my $eq = "";
2035 my $prec = 19;
2036 if ($op->flags & OPf_STACKED) {
2037 $eq = "=";
2038 $prec = 7;
2039 }
6e90668e
SM
2040 if (null($right)) { # list repeat; count is inside left-side ex-list
2041 my $kid = $left->first->sibling; # skip pushmark
2042 my @exprs;
2043 for (; !null($kid->sibling); $kid = $kid->sibling) {
9d2c6865 2044 push @exprs, $self->deparse($kid, 6);
6e90668e
SM
2045 }
2046 $right = $kid;
2047 $left = "(" . join(", ", @exprs). ")";
2048 } else {
9d2c6865 2049 $left = $self->deparse_binop_left($op, $left, $prec);
6e90668e 2050 }
9d2c6865
SM
2051 $right = $self->deparse_binop_right($op, $right, $prec);
2052 return $self->maybe_parens("$left x$eq $right", $cx, $prec);
6e90668e
SM
2053}
2054
2055sub range {
2056 my $self = shift;
9d2c6865 2057 my ($op, $cx, $type) = @_;
6e90668e
SM
2058 my $left = $op->first;
2059 my $right = $left->sibling;
9d2c6865
SM
2060 $left = $self->deparse($left, 9);
2061 $right = $self->deparse($right, 9);
2062 return $self->maybe_parens("$left $type $right", $cx, 9);
6e90668e
SM
2063}
2064
2065sub pp_flop {
2066 my $self = shift;
9d2c6865 2067 my($op, $cx) = @_;
6e90668e
SM
2068 my $flip = $op->first;
2069 my $type = ($flip->flags & OPf_SPECIAL) ? "..." : "..";
9d2c6865 2070 return $self->range($flip->first, $cx, $type);
6e90668e
SM
2071}
2072
2073# one-line while/until is handled in pp_leave
2074
2075sub logop {
2076 my $self = shift;
9d2c6865 2077 my ($op, $cx, $lowop, $lowprec, $highop, $highprec, $blockname) = @_;
6e90668e
SM
2078 my $left = $op->first;
2079 my $right = $op->first->sibling;
d989cdac 2080 if ($cx < 1 and is_scope($right) and $blockname
58cccf98
SM
2081 and $self->{'expand'} < 7)
2082 { # if ($a) {$b}
9d2c6865
SM
2083 $left = $self->deparse($left, 1);
2084 $right = $self->deparse($right, 0);
2085 return "$blockname ($left) {\n\t$right\n\b}\cK";
d989cdac 2086 } elsif ($cx < 1 and $blockname and not $self->{'parens'}
58cccf98 2087 and $self->{'expand'} < 7) { # $b if $a
9d2c6865
SM
2088 $right = $self->deparse($right, 1);
2089 $left = $self->deparse($left, 1);
2090 return "$right $blockname $left";
2091 } elsif ($cx > $lowprec and $highop) { # $a && $b
2092 $left = $self->deparse_binop_left($op, $left, $highprec);
2093 $right = $self->deparse_binop_right($op, $right, $highprec);
2094 return $self->maybe_parens("$left $highop $right", $cx, $highprec);
2095 } else { # $a and $b
2096 $left = $self->deparse_binop_left($op, $left, $lowprec);
2097 $right = $self->deparse_binop_right($op, $right, $lowprec);
d989cdac 2098 return $self->maybe_parens("$left $lowop $right", $cx, $lowprec);
9d2c6865
SM
2099 }
2100}
2101
2102sub pp_and { logop(@_, "and", 3, "&&", 11, "if") }
f4a44678 2103sub pp_or { logop(@_, "or", 2, "||", 10, "unless") }
c963b151 2104sub pp_dor { logop(@_, "err", 2, "//", 10, "") }
3ed82cfc
GS
2105
2106# xor is syntactically a logop, but it's really a binop (contrary to
2107# old versions of opcode.pl). Syntax is what matters here.
9d2c6865 2108sub pp_xor { logop(@_, "xor", 2, "", 0, "") }
6e90668e
SM
2109
2110sub logassignop {
2111 my $self = shift;
9d2c6865 2112 my ($op, $cx, $opname) = @_;
6e90668e
SM
2113 my $left = $op->first;
2114 my $right = $op->first->sibling->first; # skip sassign
9d2c6865
SM
2115 $left = $self->deparse($left, 7);
2116 $right = $self->deparse($right, 7);
2117 return $self->maybe_parens("$left $opname $right", $cx, 7);
a798dbf2
MB
2118}
2119
6e90668e 2120sub pp_andassign { logassignop(@_, "&&=") }
c963b151
BD
2121sub pp_orassign { logassignop(@_, "||=") }
2122sub pp_dorassign { logassignop(@_, "//=") }
6e90668e
SM
2123
2124sub listop {
2125 my $self = shift;
9d2c6865
SM
2126 my($op, $cx, $name) = @_;
2127 my(@exprs);
2128 my $parens = ($cx >= 5) || $self->{'parens'};
2129 my $kid = $op->first->sibling;
2130 return $name if null $kid;
e31885a0 2131 my $first;
fb725297 2132 $name = "socketpair" if $name eq "sockpair";
b72c97e8
RGS
2133 my $proto = prototype("CORE::$name");
2134 if (defined $proto
2135 && $proto =~ /^;?\*/
e31885a0
RH
2136 && $kid->name eq "rv2gv") {
2137 $first = $self->deparse($kid->first, 6);
2138 }
2139 else {
2140 $first = $self->deparse($kid, 6);
2141 }
e99ebc55 2142 if ($name eq "chmod" && $first =~ /^\d+$/) {
a0035eb8 2143 $first = sprintf("%#o", $first);
e99ebc55 2144 }
9d2c6865
SM
2145 $first = "+$first" if not $parens and substr($first, 0, 1) eq "(";
2146 push @exprs, $first;
2147 $kid = $kid->sibling;
e1f56625 2148 if (defined $proto && $proto =~ /^\*\*/ && $kid->name eq "rv2gv") {
b72c97e8
RGS
2149 push @exprs, $self->deparse($kid->first, 6);
2150 $kid = $kid->sibling;
2151 }
9d2c6865
SM
2152 for (; !null($kid); $kid = $kid->sibling) {
2153 push @exprs, $self->deparse($kid, 6);
2154 }
2155 if ($parens) {
2156 return "$name(" . join(", ", @exprs) . ")";
2157 } else {
2158 return "$name " . join(", ", @exprs);
6e90668e 2159 }
6e90668e 2160}
a798dbf2 2161
6e90668e 2162sub pp_bless { listop(@_, "bless") }
3ed82cfc 2163sub pp_atan2 { maybe_targmy(@_, \&listop, "atan2") }
6e90668e
SM
2164sub pp_substr { maybe_local(@_, listop(@_, "substr")) }
2165sub pp_vec { maybe_local(@_, listop(@_, "vec")) }
3ed82cfc
GS
2166sub pp_index { maybe_targmy(@_, \&listop, "index") }
2167sub pp_rindex { maybe_targmy(@_, \&listop, "rindex") }
2168sub pp_sprintf { maybe_targmy(@_, \&listop, "sprintf") }
6e90668e 2169sub pp_formline { listop(@_, "formline") } # see also deparse_format
3ed82cfc 2170sub pp_crypt { maybe_targmy(@_, \&listop, "crypt") }
6e90668e
SM
2171sub pp_unpack { listop(@_, "unpack") }
2172sub pp_pack { listop(@_, "pack") }
3ed82cfc 2173sub pp_join { maybe_targmy(@_, \&listop, "join") }
6e90668e 2174sub pp_splice { listop(@_, "splice") }
3ed82cfc
GS
2175sub pp_push { maybe_targmy(@_, \&listop, "push") }
2176sub pp_unshift { maybe_targmy(@_, \&listop, "unshift") }
6e90668e
SM
2177sub pp_reverse { listop(@_, "reverse") }
2178sub pp_warn { listop(@_, "warn") }
2179sub pp_die { listop(@_, "die") }
9d2c6865
SM
2180# Actually, return is exempt from the LLAFR (see examples in this very
2181# module!), but for consistency's sake, ignore that fact
6e90668e
SM
2182sub pp_return { listop(@_, "return") }
2183sub pp_open { listop(@_, "open") }
2184sub pp_pipe_op { listop(@_, "pipe") }
2185sub pp_tie { listop(@_, "tie") }
82bafd27 2186sub pp_binmode { listop(@_, "binmode") }
6e90668e
SM
2187sub pp_dbmopen { listop(@_, "dbmopen") }
2188sub pp_sselect { listop(@_, "select") }
2189sub pp_select { listop(@_, "select") }
2190sub pp_read { listop(@_, "read") }
2191sub pp_sysopen { listop(@_, "sysopen") }
2192sub pp_sysseek { listop(@_, "sysseek") }
2193sub pp_sysread { listop(@_, "sysread") }
2194sub pp_syswrite { listop(@_, "syswrite") }
2195sub pp_send { listop(@_, "send") }
2196sub pp_recv { listop(@_, "recv") }
2197sub pp_seek { listop(@_, "seek") }
6e90668e
SM
2198sub pp_fcntl { listop(@_, "fcntl") }
2199sub pp_ioctl { listop(@_, "ioctl") }
3ed82cfc 2200sub pp_flock { maybe_targmy(@_, \&listop, "flock") }
6e90668e
SM
2201sub pp_socket { listop(@_, "socket") }
2202sub pp_sockpair { listop(@_, "sockpair") }
2203sub pp_bind { listop(@_, "bind") }
2204sub pp_connect { listop(@_, "connect") }
2205sub pp_listen { listop(@_, "listen") }
2206sub pp_accept { listop(@_, "accept") }
2207sub pp_shutdown { listop(@_, "shutdown") }
2208sub pp_gsockopt { listop(@_, "getsockopt") }
2209sub pp_ssockopt { listop(@_, "setsockopt") }
3ed82cfc
GS
2210sub pp_chown { maybe_targmy(@_, \&listop, "chown") }
2211sub pp_unlink { maybe_targmy(@_, \&listop, "unlink") }
2212sub pp_chmod { maybe_targmy(@_, \&listop, "chmod") }
2213sub pp_utime { maybe_targmy(@_, \&listop, "utime") }
2214sub pp_rename { maybe_targmy(@_, \&listop, "rename") }
2215sub pp_link { maybe_targmy(@_, \&listop, "link") }
2216sub pp_symlink { maybe_targmy(@_, \&listop, "symlink") }
2217sub pp_mkdir { maybe_targmy(@_, \&listop, "mkdir") }
6e90668e
SM
2218sub pp_open_dir { listop(@_, "opendir") }
2219sub pp_seekdir { listop(@_, "seekdir") }
3ed82cfc
GS
2220sub pp_waitpid { maybe_targmy(@_, \&listop, "waitpid") }
2221sub pp_system { maybe_targmy(@_, \&listop, "system") }
2222sub pp_exec { maybe_targmy(@_, \&listop, "exec") }
2223sub pp_kill { maybe_targmy(@_, \&listop, "kill") }
2224sub pp_setpgrp { maybe_targmy(@_, \&listop, "setpgrp") }
2225sub pp_getpriority { maybe_targmy(@_, \&listop, "getpriority") }
2226sub pp_setpriority { maybe_targmy(@_, \&listop, "setpriority") }
6e90668e
SM
2227sub pp_shmget { listop(@_, "shmget") }
2228sub pp_shmctl { listop(@_, "shmctl") }
2229sub pp_shmread { listop(@_, "shmread") }
2230sub pp_shmwrite { listop(@_, "shmwrite") }
2231sub pp_msgget { listop(@_, "msgget") }
2232sub pp_msgctl { listop(@_, "msgctl") }
2233sub pp_msgsnd { listop(@_, "msgsnd") }
2234sub pp_msgrcv { listop(@_, "msgrcv") }
2235sub pp_semget { listop(@_, "semget") }
2236sub pp_semctl { listop(@_, "semctl") }
2237sub pp_semop { listop(@_, "semop") }
2238sub pp_ghbyaddr { listop(@_, "gethostbyaddr") }
2239sub pp_gnbyaddr { listop(@_, "getnetbyaddr") }
2240sub pp_gpbynumber { listop(@_, "getprotobynumber") }
2241sub pp_gsbyname { listop(@_, "getservbyname") }
2242sub pp_gsbyport { listop(@_, "getservbyport") }
2243sub pp_syscall { listop(@_, "syscall") }
2244
2245sub pp_glob {
2246 my $self = shift;
9d2c6865 2247 my($op, $cx) = @_;
6e90668e
SM
2248 my $text = $self->dq($op->first->sibling); # skip pushmark
2249 if ($text =~ /^\$?(\w|::|\`)+$/ # could look like a readline
d989cdac 2250 or $text =~ /[<>]/) {
6e90668e
SM
2251 return 'glob(' . single_delim('qq', '"', $text) . ')';
2252 } else {
2253 return '<' . $text . '>';
2254 }
2255}
2256
f5aa8f4e
SM
2257# Truncate is special because OPf_SPECIAL makes a bareword first arg
2258# be a filehandle. This could probably be better fixed in the core
2259# by moving the GV lookup into ck_truc.
2260
2261sub pp_truncate {
2262 my $self = shift;
2263 my($op, $cx) = @_;
2264 my(@exprs);
2265 my $parens = ($cx >= 5) || $self->{'parens'};
2266 my $kid = $op->first->sibling;
acba1d67 2267 my $fh;
f5aa8f4e
SM
2268 if ($op->flags & OPf_SPECIAL) {
2269 # $kid is an OP_CONST
18228111 2270 $fh = $self->const_sv($kid)->PV;
f5aa8f4e
SM
2271 } else {
2272 $fh = $self->deparse($kid, 6);
2273 $fh = "+$fh" if not $parens and substr($fh, 0, 1) eq "(";
2274 }
2275 my $len = $self->deparse($kid->sibling, 6);
2276 if ($parens) {
2277 return "truncate($fh, $len)";
2278 } else {
2279 return "truncate $fh, $len";
2280 }
f5aa8f4e
SM
2281}
2282
6e90668e
SM
2283sub indirop {
2284 my $self = shift;
9d2c6865 2285 my($op, $cx, $name) = @_;
6e90668e
SM
2286 my($expr, @exprs);
2287 my $kid = $op->first->sibling;
2288 my $indir = "";
2289 if ($op->flags & OPf_STACKED) {
2290 $indir = $kid;
2291 $indir = $indir->first; # skip rv2gv
2292 if (is_scope($indir)) {
9d2c6865 2293 $indir = "{" . $self->deparse($indir, 0) . "}";
d989cdac 2294 $indir = "{;}" if $indir eq "{}";
c73811ab
RH
2295 } elsif ($indir->name eq "const" && $indir->private & OPpCONST_BARE) {
2296 $indir = $self->const_sv($indir)->PV;
6e90668e 2297 } else {
9d2c6865 2298 $indir = $self->deparse($indir, 24);
6e90668e
SM
2299 }
2300 $indir = $indir . " ";
2301 $kid = $kid->sibling;
2302 }
7e80da18
RH
2303 if ($name eq "sort" && $op->private & (OPpSORT_NUMERIC | OPpSORT_INTEGER)) {
2304 $indir = ($op->private & OPpSORT_REVERSE) ? '{$b <=> $a} '
2305 : '{$a <=> $b} ';
2306 }
2307 elsif ($name eq "sort" && $op->private & OPpSORT_REVERSE) {
2308 $indir = '{$b cmp $a} ';
2309 }
6e90668e 2310 for (; !null($kid); $kid = $kid->sibling) {
9d2c6865 2311 $expr = $self->deparse($kid, 6);
6e90668e
SM
2312 push @exprs, $expr;
2313 }
2b6e98cb
DM
2314 if ($name eq "sort" && ($op->private & OPpSORT_INPLACE)) {
2315 return "$exprs[0] = sort $indir $exprs[0]";
2316 }
2317
d989cdac
SM
2318 my $args = $indir . join(", ", @exprs);
2319 if ($indir ne "" and $name eq "sort") {
2320 # We don't want to say "sort(f 1, 2, 3)", since perl -w will
2321 # give bareword warnings in that case. Therefore if context
2322 # requires, we'll put parens around the outside "(sort f 1, 2,
2323 # 3)". Unfortunately, we'll currently think the parens are
2324 # neccessary more often that they really are, because we don't
2325 # distinguish which side of an assignment we're on.
2326 if ($cx >= 5) {
2327 return "($name $args)";
2328 } else {
2329 return "$name $args";
2330 }
2331 } else {
2332 return $self->maybe_parens_func($name, $args, $cx, 5);
2333 }
2334
6e90668e
SM
2335}
2336
2337sub pp_prtf { indirop(@_, "printf") }
2338sub pp_print { indirop(@_, "print") }
2339sub pp_sort { indirop(@_, "sort") }
2340
2341sub mapop {
2342 my $self = shift;
9d2c6865 2343 my($op, $cx, $name) = @_;
6e90668e
SM
2344 my($expr, @exprs);
2345 my $kid = $op->first; # this is the (map|grep)start
2346 $kid = $kid->first->sibling; # skip a pushmark
2347 my $code = $kid->first; # skip a null
2348 if (is_scope $code) {
f4a44678 2349 $code = "{" . $self->deparse($code, 0) . "} ";
6e90668e 2350 } else {
9d2c6865 2351 $code = $self->deparse($code, 24) . ", ";
6e90668e
SM
2352 }
2353 $kid = $kid->sibling;
2354 for (; !null($kid); $kid = $kid->sibling) {
9d2c6865 2355 $expr = $self->deparse($kid, 6);
9a58b761 2356 push @exprs, $expr if defined $expr;
6e90668e 2357 }
9d2c6865 2358 return $self->maybe_parens_func($name, $code . join(", ", @exprs), $cx, 5);
6e90668e
SM
2359}
2360
d989cdac
SM
2361sub pp_mapwhile { mapop(@_, "map") }
2362sub pp_grepwhile { mapop(@_, "grep") }
6e90668e
SM
2363
2364sub pp_list {
2365 my $self = shift;
9d2c6865 2366 my($op, $cx) = @_;
6e90668e
SM
2367 my($expr, @exprs);
2368 my $kid = $op->first->sibling; # skip pushmark
2369 my $lop;
ce4e655d 2370 my $local = "either"; # could be local(...), my(...) or our(...)
6e90668e
SM
2371 for ($lop = $kid; !null($lop); $lop = $lop->sibling) {
2372 # This assumes that no other private flags equal 128, and that
2373 # OPs that store things other than flags in their op_private,
2374 # like OP_AELEMFAST, won't be immediate children of a list.
b8e103fc
RH
2375 #
2376 # OP_ENTERSUB can break this logic, so check for it.
2377 # I suspect that open and exit can too.
2378
2379 if (!($lop->private & (OPpLVAL_INTRO|OPpOUR_INTRO)
ce4e655d 2380 or $lop->name eq "undef")
b8e103fc
RH
2381 or $lop->name eq "entersub"
2382 or $lop->name eq "exit"
2383 or $lop->name eq "open")
6e90668e
SM
2384 {
2385 $local = ""; # or not
2386 last;
2387 }
3f872cb9 2388 if ($lop->name =~ /^pad[ash]v$/) { # my()
ce4e655d 2389 ($local = "", last) if $local eq "local" || $local eq "our";
6e90668e 2390 $local = "my";
b8e103fc
RH
2391 } elsif ($lop->name =~ /^(gv|rv2)[ash]v$/
2392 && $lop->private & OPpOUR_INTRO
2393 or $lop->name eq "null" && $lop->first->name eq "gvsv"
2394 && $lop->first->private & OPpOUR_INTRO) { # our()
ce4e655d
RH
2395 ($local = "", last) if $local eq "my" || $local eq "local";
2396 $local = "our";
3f872cb9 2397 } elsif ($lop->name ne "undef") { # local()
ce4e655d 2398 ($local = "", last) if $local eq "my" || $local eq "our";
6e90668e
SM
2399 $local = "local";
2400 }
2401 }
2402 $local = "" if $local eq "either"; # no point if it's all undefs
f5aa8f4e 2403 return $self->deparse($kid, $cx) if null $kid->sibling and not $local;
6e90668e
SM
2404 for (; !null($kid); $kid = $kid->sibling) {
2405 if ($local) {
3f872cb9 2406 if (class($kid) eq "UNOP" and $kid->first->name eq "gvsv") {
6e90668e
SM
2407 $lop = $kid->first;
2408 } else {
2409 $lop = $kid;
2410 }
2411 $self->{'avoid_local'}{$$lop}++;
9d2c6865 2412 $expr = $self->deparse($kid, 6);
6e90668e
SM
2413 delete $self->{'avoid_local'}{$$lop};
2414 } else {
9d2c6865 2415 $expr = $self->deparse($kid, 6);
6e90668e
SM
2416 }
2417 push @exprs, $expr;
2418 }
9d2c6865
SM
2419 if ($local) {
2420 return "$local(" . join(", ", @exprs) . ")";
2421 } else {
2422 return $self->maybe_parens( join(", ", @exprs), $cx, 6);
2423 }
6e90668e
SM
2424}
2425
6f611a1a
GS
2426sub is_ifelse_cont {
2427 my $op = shift;
2428 return ($op->name eq "null" and class($op) eq "UNOP"
2429 and $op->first->name =~ /^(and|cond_expr)$/
2430 and is_scope($op->first->first->sibling));
2431}
2432
6e90668e
SM
2433sub pp_cond_expr {
2434 my $self = shift;
9d2c6865 2435 my($op, $cx) = @_;
6e90668e
SM
2436 my $cond = $op->first;
2437 my $true = $cond->sibling;
2438 my $false = $true->sibling;
9d2c6865 2439 my $cuddle = $self->{'cuddle'};
d989cdac 2440 unless ($cx < 1 and (is_scope($true) and $true->name ne "null") and
58cccf98
SM
2441 (is_scope($false) || is_ifelse_cont($false))
2442 and $self->{'expand'} < 7) {
f5aa8f4e 2443 $cond = $self->deparse($cond, 8);
9d2c6865
SM
2444 $true = $self->deparse($true, 8);
2445 $false = $self->deparse($false, 8);
2446 return $self->maybe_parens("$cond ? $true : $false", $cx, 8);
6f611a1a
GS
2447 }
2448
f5aa8f4e 2449 $cond = $self->deparse($cond, 1);
d989cdac 2450 $true = $self->deparse($true, 0);
6f611a1a
GS
2451 my $head = "if ($cond) {\n\t$true\n\b}";
2452 my @elsifs;
2453 while (!null($false) and is_ifelse_cont($false)) {
2454 my $newop = $false->first;
2455 my $newcond = $newop->first;
2456 my $newtrue = $newcond->sibling;
2457 $false = $newtrue->sibling; # last in chain is OP_AND => no else
2458 $newcond = $self->deparse($newcond, 1);
2459 $newtrue = $self->deparse($newtrue, 0);
2460 push @elsifs, "elsif ($newcond) {\n\t$newtrue\n\b}";
2461 }
d989cdac 2462 if (!null($false)) {
6f611a1a
GS
2463 $false = $cuddle . "else {\n\t" .
2464 $self->deparse($false, 0) . "\n\b}\cK";
2465 } else {
2466 $false = "\cK";
6e90668e 2467 }
d989cdac 2468 return $head . join($cuddle, "", @elsifs) . $false;
6e90668e
SM
2469}
2470
58cccf98 2471sub loop_common {
6e90668e 2472 my $self = shift;
58cccf98 2473 my($op, $cx, $init) = @_;
6e90668e
SM
2474 my $enter = $op->first;
2475 my $kid = $enter->sibling;
a0405c92
RH
2476 local(@$self{qw'curstash warnings hints'})
2477 = @$self{qw'curstash warnings hints'};
6e90668e 2478 my $head = "";
9d2c6865 2479 my $bare = 0;
58cccf98
SM
2480 my $body;
2481 my $cond = undef;
d989cdac 2482 if ($kid->name eq "lineseq") { # bare or infinite loop
241416b8 2483 if ($kid->last->name eq "unstack") { # infinite
e99ebc55 2484 $head = "while (1) "; # Can't use for(;;) if there's a continue
58cccf98 2485 $cond = "";
9d2c6865
SM
2486 } else {
2487 $bare = 1;
6e90668e 2488 }
58cccf98 2489 $body = $kid;
3f872cb9 2490 } elsif ($enter->name eq "enteriter") { # foreach
6e90668e
SM
2491 my $ary = $enter->first->sibling; # first was pushmark
2492 my $var = $ary->sibling;
f5aa8f4e
SM
2493 if ($enter->flags & OPf_STACKED
2494 and not null $ary->first->sibling->sibling)
2495 {
d7f5b6da
SM
2496 $ary = $self->deparse($ary->first->sibling, 9) . " .. " .
2497 $self->deparse($ary->first->sibling->sibling, 9);
d8d95777
GA
2498 } else {
2499 $ary = $self->deparse($ary, 1);
2500 }
6e90668e 2501 if (null $var) {
f6f9bdb7 2502 if ($enter->flags & OPf_SPECIAL) { # thread special var
9d2c6865 2503 $var = $self->pp_threadsv($enter, 1);
f6f9bdb7 2504 } else { # regular my() variable
9d2c6865 2505 $var = $self->pp_padsv($enter, 1);
6e90668e 2506 }
3f872cb9 2507 } elsif ($var->name eq "rv2gv") {
9d2c6865 2508 $var = $self->pp_rv2sv($var, 1);
241416b8
DM
2509 if ($enter->private & OPpOUR_INTRO) {
2510 # our declarations don't have package names
2511 $var =~ s/^(.).*::/$1/;
2512 $var = "our $var";
2513 }
3f872cb9 2514 } elsif ($var->name eq "gv") {
9d2c6865 2515 $var = "\$" . $self->deparse($var, 1);
6e90668e 2516 }
9d2c6865 2517 $head = "foreach $var ($ary) ";
58cccf98 2518 $body = $kid->first->first->sibling; # skip OP_AND and OP_ITER
3f872cb9 2519 } elsif ($kid->name eq "null") { # while/until
6e90668e 2520 $kid = $kid->first;
58cccf98
SM
2521 my $name = {"and" => "while", "or" => "until"}->{$kid->name};
2522 $cond = $self->deparse($kid->first, 1);
2523 $head = "$name ($cond) ";
2524 $body = $kid->first->sibling;
3f872cb9 2525 } elsif ($kid->name eq "stub") { # bare and empty
9d2c6865 2526 return "{;}"; # {} could be a hashref
6e90668e 2527 }
58cccf98 2528 # If there isn't a continue block, then the next pointer for the loop
241416b8 2529 # will point to the unstack, which is kid's last child, except
58cccf98 2530 # in a bare loop, when it will point to the leaveloop. When neither of
241416b8 2531 # these conditions hold, then the second-to-last child is the continue
58cccf98
SM
2532 # block (or the last in a bare loop).
2533 my $cont_start = $enter->nextop;
2534 my $cont;
241416b8 2535 if ($$cont_start != $$op && ${$cont_start} != ${$body->last}) {
58cccf98
SM
2536 if ($bare) {
2537 $cont = $body->last;
2538 } else {
2539 $cont = $body->first;
241416b8 2540 while (!null($cont->sibling->sibling)) {
58cccf98
SM
2541 $cont = $cont->sibling;
2542 }
2543 }
2544 my $state = $body->first;
2545 my $cuddle = $self->{'cuddle'};
2546 my @states;
2547 for (; $$state != $$cont; $state = $state->sibling) {
2548 push @states, $state;
2549 }
ce4e655d 2550 $body = $self->lineseq(undef, @states);
58cccf98
SM
2551 if (defined $cond and not is_scope $cont and $self->{'expand'} < 3) {
2552 $head = "for ($init; $cond; " . $self->deparse($cont, 1) .") ";
2553 $cont = "\cK";
2554 } else {
2555 $cont = $cuddle . "continue {\n\t" .
2556 $self->deparse($cont, 0) . "\n\b}\cK";
6e90668e 2557 }
6e90668e 2558 } else {
7a9b44b9 2559 return "" if !defined $body;
c73811ab
RH
2560 if (length $init) {
2561 $head = "for ($init; $cond;) ";
2562 }
9d2c6865 2563 $cont = "\cK";
58cccf98 2564 $body = $self->deparse($body, 0);
6e90668e 2565 }
ce4e655d 2566 $body =~ s/;?$/;\n/;
34a48b4b
RH
2567
2568 return $head . "{\n\t" . $body . "\b}" . $cont;
58cccf98
SM
2569}
2570
2571sub pp_leaveloop { loop_common(@_, "") }
2572
2573sub for_loop {
2574 my $self = shift;
2575 my($op, $cx) = @_;
2576 my $init = $self->deparse($op, 1);
c73811ab 2577 return $self->loop_common($op->sibling->first->sibling, $cx, $init);
6e90668e
SM
2578}
2579
2580sub pp_leavetry {
2581 my $self = shift;
9d2c6865 2582 return "eval {\n\t" . $self->pp_leave(@_) . "\n\b}";
bd0865ec 2583}
6e90668e 2584
bd0865ec
GS
2585BEGIN { eval "sub OP_CONST () {" . opnumber("const") . "}" }
2586BEGIN { eval "sub OP_STRINGIFY () {" . opnumber("stringify") . "}" }
a9760014 2587BEGIN { eval "sub OP_RV2SV () {" . opnumber("rv2sv") . "}" }
90c0eb26 2588BEGIN { eval "sub OP_LIST () {" . opnumber("list") . "}" }
f5aa8f4e 2589
a798dbf2 2590sub pp_null {
6e90668e 2591 my $self = shift;
d989cdac 2592 my($op, $cx) = @_;
6e90668e 2593 if (class($op) eq "OP") {
f4a44678
SM
2594 # old value is lost
2595 return $self->{'ex_const'} if $op->targ == OP_CONST;
3f872cb9 2596 } elsif ($op->first->name eq "pushmark") {
9d2c6865 2597 return $self->pp_list($op, $cx);
3f872cb9 2598 } elsif ($op->first->name eq "enter") {
9d2c6865 2599 return $self->pp_leave($op, $cx);
bd0865ec 2600 } elsif ($op->targ == OP_STRINGIFY) {
6f611a1a 2601 return $self->dquote($op, $cx);
6e90668e 2602 } elsif (!null($op->first->sibling) and
3f872cb9 2603 $op->first->sibling->name eq "readline" and
6e90668e 2604 $op->first->sibling->flags & OPf_STACKED) {
9d2c6865
SM
2605 return $self->maybe_parens($self->deparse($op->first, 7) . " = "
2606 . $self->deparse($op->first->sibling, 7),
2607 $cx, 7);
6e90668e 2608 } elsif (!null($op->first->sibling) and
3f872cb9 2609 $op->first->sibling->name eq "trans" and
6e90668e 2610 $op->first->sibling->flags & OPf_STACKED) {
9d2c6865
SM
2611 return $self->maybe_parens($self->deparse($op->first, 20) . " =~ "
2612 . $self->deparse($op->first->sibling, 20),
2613 $cx, 20);
d989cdac
SM
2614 } elsif ($op->flags & OPf_SPECIAL && $cx < 1 && !$op->targ) {
2615 return "do {\n\t". $self->deparse($op->first, $cx) ."\n\b};";
ad8caead
RGS
2616 } elsif (!null($op->first->sibling) and
2617 $op->first->sibling->name eq "null" and
2618 class($op->first->sibling) eq "UNOP" and
2619 $op->first->sibling->first->flags & OPf_STACKED and
2620 $op->first->sibling->first->name eq "rcatline") {
2621 return $self->maybe_parens($self->deparse($op->first, 18) . " .= "
2622 . $self->deparse($op->first->sibling, 18),
2623 $cx, 18);
6e90668e 2624 } else {
9d2c6865 2625 return $self->deparse($op->first, $cx);
6e90668e 2626 }
a798dbf2
MB
2627}
2628
6e90668e
SM
2629sub padname {
2630 my $self = shift;
2631 my $targ = shift;
68223ea3 2632 return $self->padname_sv($targ)->PVX;
6e90668e
SM
2633}
2634
2635sub padany {
2636 my $self = shift;
2637 my $op = shift;
2638 return substr($self->padname($op->targ), 1); # skip $/@/%
2639}
2640
2641sub pp_padsv {
2642 my $self = shift;
9d2c6865
SM
2643 my($op, $cx) = @_;
2644 return $self->maybe_my($op, $cx, $self->padname($op->targ));
6e90668e
SM
2645}
2646
2647sub pp_padav { pp_padsv(@_) }
2648sub pp_padhv { pp_padsv(@_) }
2649
9d2c6865
SM
2650my @threadsv_names;
2651
2652BEGIN {
2653 @threadsv_names = ("_", "1", "2", "3", "4", "5", "6", "7", "8", "9",
2654 "&", "`", "'", "+", "/", ".", ",", "\\", '"', ";",
2655 "^", "-", "%", "=", "|", "~", ":", "^A", "^E",
2656 "!", "@");
2657}
f6f9bdb7
SM
2658
2659sub pp_threadsv {
2660 my $self = shift;
9d2c6865
SM
2661 my($op, $cx) = @_;
2662 return $self->maybe_local($op, $cx, "\$" . $threadsv_names[$op->targ]);
d989cdac 2663}
f6f9bdb7 2664
6f611a1a 2665sub gv_or_padgv {
18228111
GS
2666 my $self = shift;
2667 my $op = shift;
6f611a1a
GS
2668 if (class($op) eq "PADOP") {
2669 return $self->padval($op->padix);
2670 } else { # class($op) eq "SVOP"
2671 return $op->gv;
18228111 2672 }
18228111
GS
2673}
2674
6e90668e
SM
2675sub pp_gvsv {
2676 my $self = shift;
9d2c6865 2677 my($op, $cx) = @_;
6f611a1a 2678 my $gv = $self->gv_or_padgv($op);
8510e997
RH
2679 return $self->maybe_local($op, $cx, $self->stash_variable("\$",
2680 $self->gv_name($gv)));
6e90668e
SM
2681}
2682
2683sub pp_gv {
2684 my $self = shift;
9d2c6865 2685 my($op, $cx) = @_;
6f611a1a 2686 my $gv = $self->gv_or_padgv($op);
18228111 2687 return $self->gv_name($gv);
6e90668e
SM
2688}
2689
2690sub pp_aelemfast {
2691 my $self = shift;
9d2c6865 2692 my($op, $cx) = @_;
6a077020
DM
2693 my $name;
2694 if ($op->flags & OPf_SPECIAL) { # optimised PADAV
2695 $name = $self->padname($op->targ);
2696 $name =~ s/^@/\$/;
2697 }
2698 else {
2699 my $gv = $self->gv_or_padgv($op);
2700 $name = $self->gv_name($gv);
2701 $name = $self->{'curstash'}."::$name"
2702 if $name !~ /::/ && $self->lex_in_scope('@'.$name);
2703 $name = '$' . $name;
2704 }
ce4e655d 2705
6a077020 2706 return $name . "[" . ($op->private + $self->{'arybase'}) . "]";
6e90668e
SM
2707}
2708
2709sub rv2x {
2710 my $self = shift;
9d2c6865 2711 my($op, $cx, $type) = @_;
90c0eb26
RH
2712
2713 if (class($op) eq 'NULL' || !$op->can("first")) {
ff97752d 2714 carp("Unexpected op in pp_rv2x");
90c0eb26
RH
2715 return 'XXX';
2716 }
6e90668e 2717 my $kid = $op->first;
d989cdac
SM
2718 if ($kid->name eq "gv") {
2719 return $self->stash_variable($type, $self->deparse($kid, 0));
2720 } elsif (is_scalar $kid) {
2721 my $str = $self->deparse($kid, 0);
2722 if ($str =~ /^\$([^\w\d])\z/) {
2723 # "$$+" isn't a legal way to write the scalar dereference
2724 # of $+, since the lexer can't tell you aren't trying to
2725 # do something like "$$ + 1" to get one more than your
2726 # PID. Either "${$+}" or "$${+}" are workable
2727 # disambiguations, but if the programmer did the former,
2728 # they'd be in the "else" clause below rather than here.
2729 # It's not clear if this should somehow be unified with
2730 # the code in dq and re_dq that also adds lexer
2731 # disambiguation braces.
2732 $str = '$' . "{$1}"; #'
2733 }
2734 return $type . $str;
2735 } else {
2736 return $type . "{" . $self->deparse($kid, 0) . "}";
2737 }
6e90668e
SM
2738}
2739
2740sub pp_rv2sv { maybe_local(@_, rv2x(@_, "\$")) }
2741sub pp_rv2hv { maybe_local(@_, rv2x(@_, "%")) }
2742sub pp_rv2gv { maybe_local(@_, rv2x(@_, "*")) }
2743
2744# skip rv2av
2745sub pp_av2arylen {
2746 my $self = shift;
9d2c6865 2747 my($op, $cx) = @_;
3f872cb9 2748 if ($op->first->name eq "padav") {
9d2c6865 2749 return $self->maybe_local($op, $cx, '$#' . $self->padany($op->first));
6e90668e 2750 } else {
f5aa8f4e
SM
2751 return $self->maybe_local($op, $cx,
2752 $self->rv2x($op->first, $cx, '$#'));
6e90668e
SM
2753 }
2754}
2755
2756# skip down to the old, ex-rv2cv
90c0eb26
RH
2757sub pp_rv2cv {
2758 my ($self, $op, $cx) = @_;
2759 if (!null($op->first) && $op->first->name eq 'null' &&
2760 $op->first->targ eq OP_LIST)
2761 {
2762 return $self->rv2x($op->first->first->sibling, $cx, "&")
2763 }
2764 else {
2765 return $self->rv2x($op, $cx, "")
2766 }
2767}
6e90668e 2768
d989cdac
SM
2769sub list_const {
2770 my $self = shift;
2771 my($cx, @list) = @_;
2772 my @a = map $self->const($_, 6), @list;
2773 if (@a == 0) {
2774 return "()";
2775 } elsif (@a == 1) {
2776 return $a[0];
2777 } elsif ( @a > 2 and !grep(!/^-?\d+$/, @a)) {
2778 # collapse (-1,0,1,2) into (-1..2)
2779 my ($s, $e) = @a[0,-1];
2780 my $i = $s;
2781 return $self->maybe_parens("$s..$e", $cx, 9)
2782 unless grep $i++ != $_, @a;
2783 }
2784 return $self->maybe_parens(join(", ", @a), $cx, 6);
2785}
2786
6e90668e
SM
2787sub pp_rv2av {
2788 my $self = shift;
9d2c6865 2789 my($op, $cx) = @_;
6e90668e 2790 my $kid = $op->first;
3f872cb9 2791 if ($kid->name eq "const") { # constant list
18228111 2792 my $av = $self->const_sv($kid);
d989cdac 2793 return $self->list_const($cx, $av->ARRAY);
6e90668e 2794 } else {
9d2c6865 2795 return $self->maybe_local($op, $cx, $self->rv2x($op, $cx, "\@"));
6e90668e
SM
2796 }
2797 }
2798
3ed82cfc
GS
2799sub is_subscriptable {
2800 my $op = shift;
2801 if ($op->name =~ /^[ahg]elem/) {
2802 return 1;
2803 } elsif ($op->name eq "entersub") {
2804 my $kid = $op->first;
2805 return 0 unless null $kid->sibling;
2806 $kid = $kid->first;
2807 $kid = $kid->sibling until null $kid->sibling;
2808 return 0 if is_scope($kid);
2809 $kid = $kid->first;
2810 return 0 if $kid->name eq "gv";
2811 return 0 if is_scalar($kid);
2812 return is_subscriptable($kid);
2813 } else {
2814 return 0;
2815 }
2816}
6e90668e
SM
2817
2818sub elem {
2819 my $self = shift;
9d2c6865 2820 my ($op, $cx, $left, $right, $padname) = @_;
6e90668e 2821 my($array, $idx) = ($op->first, $op->first->sibling);
3f872cb9 2822 unless ($array->name eq $padname) { # Maybe this has been fixed
6e90668e
SM
2823 $array = $array->first; # skip rv2av (or ex-rv2av in _53+)
2824 }
3f872cb9 2825 if ($array->name eq $padname) {
6e90668e
SM
2826 $array = $self->padany($array);
2827 } elsif (is_scope($array)) { # ${expr}[0]
9d2c6865 2828 $array = "{" . $self->deparse($array, 0) . "}";
ce4e655d
RH
2829 } elsif ($array->name eq "gv") {
2830 $array = $self->gv_name($self->gv_or_padgv($array));
2831 if ($array !~ /::/) {
2832 my $prefix = ($left eq '[' ? '@' : '%');
2833 $array = $self->{curstash}.'::'.$array
2834 if $self->lex_in_scope($prefix . $array);
2835 }
6e90668e 2836 } elsif (is_scalar $array) { # $x[0], $$x[0], ...
9d2c6865 2837 $array = $self->deparse($array, 24);
6e90668e
SM
2838 } else {
2839 # $x[20][3]{hi} or expr->[20]
3ed82cfc 2840 my $arrow = is_subscriptable($array) ? "" : "->";
9d2c6865
SM
2841 return $self->deparse($array, 24) . $arrow .
2842 $left . $self->deparse($idx, 1) . $right;
6e90668e 2843 }
9d2c6865 2844 $idx = $self->deparse($idx, 1);
7a9b44b9
RH
2845
2846 # Outer parens in an array index will confuse perl
2847 # if we're interpolating in a regular expression, i.e.
2848 # /$x$foo[(-1)]/ is *not* the same as /$x$foo[-1]/
2849 #
2850 # If $self->{parens}, then an initial '(' will
2851 # definitely be paired with a final ')'. If
2852 # !$self->{parens}, the misleading parens won't
2853 # have been added in the first place.
2854 #
2855 # [You might think that we could get "(...)...(...)"
2856 # where the initial and final parens do not match
2857 # each other. But we can't, because the above would
2858 # only happen if there's an infix binop between the
2859 # two pairs of parens, and *that* means that the whole
2860 # expression would be parenthesized as well.]
2861 #
2862 $idx =~ s/^\((.*)\)$/$1/ if $self->{'parens'};
2863
098251bc
RH
2864 # Hash-element braces will autoquote a bareword inside themselves.
2865 # We need to make sure that C<$hash{warn()}> doesn't come out as
2866 # C<$hash{warn}>, which has a quite different meaning. Currently
2867 # B::Deparse will always quote strings, even if the string was a
2868 # bareword in the original (i.e. the OPpCONST_BARE flag is ignored
2869 # for constant strings.) So we can cheat slightly here - if we see
2870 # a bareword, we know that it is supposed to be a function call.
2871 #
2872 $idx =~ s/^([A-Za-z_]\w*)$/$1()/;
2873
6e90668e
SM
2874 return "\$" . $array . $left . $idx . $right;
2875}
2876
3f872cb9
GS
2877sub pp_aelem { maybe_local(@_, elem(@_, "[", "]", "padav")) }
2878sub pp_helem { maybe_local(@_, elem(@_, "{", "}", "padhv")) }
6e90668e
SM
2879
2880sub pp_gelem {
2881 my $self = shift;
9d2c6865 2882 my($op, $cx) = @_;
6e90668e
SM
2883 my($glob, $part) = ($op->first, $op->last);
2884 $glob = $glob->first; # skip rv2gv
3f872cb9 2885 $glob = $glob->first if $glob->name eq "rv2gv"; # this one's a bug
9d2c6865
SM
2886 my $scope = is_scope($glob);
2887 $glob = $self->deparse($glob, 0);
2888 $part = $self->deparse($part, 1);
6e90668e
SM
2889 return "*" . ($scope ? "{$glob}" : $glob) . "{$part}";
2890}
2891
2892sub slice {
2893 my $self = shift;
9d2c6865 2894 my ($op, $cx, $left, $right, $regname, $padname) = @_;
6e90668e
SM
2895 my $last;
2896 my(@elems, $kid, $array, $list);
2897 if (class($op) eq "LISTOP") {
2898 $last = $op->last;
2899 } else { # ex-hslice inside delete()
2900 for ($kid = $op->first; !null $kid->sibling; $kid = $kid->sibling) {}
2901 $last = $kid;
2902 }
2903 $array = $last;
2904 $array = $array->first
3f872cb9 2905 if $array->name eq $regname or $array->name eq "null";
6e90668e 2906 if (is_scope($array)) {
9d2c6865 2907 $array = "{" . $self->deparse($array, 0) . "}";
3f872cb9 2908 } elsif ($array->name eq $padname) {
6e90668e
SM
2909 $array = $self->padany($array);
2910 } else {
9d2c6865 2911 $array = $self->deparse($array, 24);
6e90668e
SM
2912 }
2913 $kid = $op->first->sibling; # skip pushmark
3f872cb9 2914 if ($kid->name eq "list") {
6e90668e
SM
2915 $kid = $kid->first->sibling; # skip list, pushmark
2916 for (; !null $kid; $kid = $kid->sibling) {
9d2c6865 2917 push @elems, $self->deparse($kid, 6);
6e90668e
SM
2918 }
2919 $list = join(", ", @elems);
2920 } else {
9d2c6865 2921 $list = $self->deparse($kid, 1);
6e90668e
SM
2922 }
2923 return "\@" . $array . $left . $list . $right;
2924}
2925
3ed82cfc
GS
2926sub pp_aslice { maybe_local(@_, slice(@_, "[", "]", "rv2av", "padav")) }
2927sub pp_hslice { maybe_local(@_, slice(@_, "{", "}", "rv2hv", "padhv")) }
6e90668e
SM
2928
2929sub pp_lslice {
2930 my $self = shift;
9d2c6865 2931 my($op, $cx) = @_;
6e90668e
SM
2932 my $idx = $op->first;
2933 my $list = $op->last;
2934 my(@elems, $kid);
9d2c6865
SM
2935 $list = $self->deparse($list, 1);
2936 $idx = $self->deparse($idx, 1);
2937 return "($list)" . "[$idx]";
6e90668e
SM
2938}
2939
6e90668e
SM
2940sub want_scalar {
2941 my $op = shift;
2942 return ($op->flags & OPf_WANT) == OPf_WANT_SCALAR;
2943}
2944
bd0865ec
GS
2945sub want_list {
2946 my $op = shift;
2947 return ($op->flags & OPf_WANT) == OPf_WANT_LIST;
2948}
2949
2950sub method {
6e90668e 2951 my $self = shift;
9d2c6865 2952 my($op, $cx) = @_;
bd0865ec
GS
2953 my $kid = $op->first->sibling; # skip pushmark
2954 my($meth, $obj, @exprs);
3f872cb9 2955 if ($kid->name eq "list" and want_list $kid) {
bd0865ec
GS
2956 # When an indirect object isn't a bareword but the args are in
2957 # parens, the parens aren't part of the method syntax (the LLAFR
2958 # doesn't apply), but they make a list with OPf_PARENS set that
2959 # doesn't get flattened by the append_elem that adds the method,
2960 # making a (object, arg1, arg2, ...) list where the object
d989cdac 2961 # usually is. This can be distinguished from
bd0865ec
GS
2962 # `($obj, $arg1, $arg2)->meth()' (which is legal if $arg2 is an
2963 # object) because in the later the list is in scalar context
2964 # as the left side of -> always is, while in the former
2965 # the list is in list context as method arguments always are.
2966 # (Good thing there aren't method prototypes!)
3ed82cfc 2967 $meth = $kid->sibling;
bd0865ec
GS
2968 $kid = $kid->first->sibling; # skip pushmark
2969 $obj = $kid;
6e90668e 2970 $kid = $kid->sibling;
bd0865ec 2971 for (; not null $kid; $kid = $kid->sibling) {
9d2c6865 2972 push @exprs, $self->deparse($kid, 6);
6e90668e 2973 }
bd0865ec
GS
2974 } else {
2975 $obj = $kid;
2976 $kid = $kid->sibling;
90c0eb26
RH
2977 for (; !null ($kid->sibling) && $kid->name ne "method_named";
2978 $kid = $kid->sibling) {
bd0865ec 2979 push @exprs, $self->deparse($kid, 6);
6e90668e 2980 }
3ed82cfc 2981 $meth = $kid;
bd0865ec
GS
2982 }
2983 $obj = $self->deparse($obj, 24);
3ed82cfc 2984 if ($meth->name eq "method_named") {
18228111 2985 $meth = $self->const_sv($meth)->PV;
bd0865ec 2986 } else {
3ed82cfc
GS
2987 $meth = $meth->first;
2988 if ($meth->name eq "const") {
2989 # As of 5.005_58, this case is probably obsoleted by the
2990 # method_named case above
18228111 2991 $meth = $self->const_sv($meth)->PV; # needs to be bare
3ed82cfc
GS
2992 } else {
2993 $meth = $self->deparse($meth, 1);
2994 }
bd0865ec
GS
2995 }
2996 my $args = join(", ", @exprs);
2997 $kid = $obj . "->" . $meth;
145eb477 2998 if (length $args) {
bd0865ec
GS
2999 return $kid . "(" . $args . ")"; # parens mandatory
3000 } else {
3001 return $kid;
3002 }
3003}
3004
3005# returns "&" if the prototype doesn't match the args,
3006# or ("", $args_after_prototype_demunging) if it does.
3007sub check_proto {
3008 my $self = shift;
acaaef34 3009 return "&" if $self->{'noproto'};
bd0865ec
GS
3010 my($proto, @args) = @_;
3011 my($arg, $real);
3012 my $doneok = 0;
3013 my @reals;
3014 # An unbackslashed @ or % gobbles up the rest of the args
2ae48fff 3015 1 while $proto =~ s/(?<!\\)([@%])[^\]]+$/$1/;
bd0865ec 3016 while ($proto) {
2ae48fff 3017 $proto =~ s/^(\\?[\$\@&%*]|\\\[[\$\@&%*]+\]|;)//;
bd0865ec
GS
3018 my $chr = $1;
3019 if ($chr eq "") {
3020 return "&" if @args;
3021 } elsif ($chr eq ";") {
3022 $doneok = 1;
3023 } elsif ($chr eq "@" or $chr eq "%") {
3024 push @reals, map($self->deparse($_, 6), @args);
3025 @args = ();
6e90668e 3026 } else {
bd0865ec
GS
3027 $arg = shift @args;
3028 last unless $arg;
3029 if ($chr eq "\$") {
3030 if (want_scalar $arg) {
3031 push @reals, $self->deparse($arg, 6);
3032 } else {
3033 return "&";
3034 }
3035 } elsif ($chr eq "&") {
3f872cb9 3036 if ($arg->name =~ /^(s?refgen|undef)$/) {
bd0865ec
GS
3037 push @reals, $self->deparse($arg, 6);
3038 } else {
3039 return "&";
3040 }
3041 } elsif ($chr eq "*") {
3f872cb9
GS
3042 if ($arg->name =~ /^s?refgen$/
3043 and $arg->first->first->name eq "rv2gv")
bd0865ec
GS
3044 {
3045 $real = $arg->first->first; # skip refgen, null
3f872cb9 3046 if ($real->first->name eq "gv") {
bd0865ec
GS
3047 push @reals, $self->deparse($real, 6);
3048 } else {
3049 push @reals, $self->deparse($real->first, 6);
3050 }
3051 } else {
3052 return "&";
3053 }
3054 } elsif (substr($chr, 0, 1) eq "\\") {
2ae48fff 3055 $chr =~ tr/\\[]//d;
3f872cb9 3056 if ($arg->name =~ /^s?refgen$/ and
bd0865ec 3057 !null($real = $arg->first) and
2ae48fff
RGS
3058 ($chr =~ /\$/ && is_scalar($real->first)
3059 or ($chr =~ /@/
3060 && class($real->first->sibling) ne 'NULL'
3f872cb9
GS
3061 && $real->first->sibling->name
3062 =~ /^(rv2|pad)av$/)
2ae48fff
RGS
3063 or ($chr =~ /%/
3064 && class($real->first->sibling) ne 'NULL'
3f872cb9
GS
3065 && $real->first->sibling->name
3066 =~ /^(rv2|pad)hv$/)
2ae48fff 3067 #or ($chr =~ /&/ # This doesn't work
3f872cb9 3068 # && $real->first->name eq "rv2cv")
2ae48fff 3069 or ($chr =~ /\*/
3f872cb9 3070 && $real->first->name eq "rv2gv")))
bd0865ec
GS
3071 {
3072 push @reals, $self->deparse($real, 6);
3073 } else {
3074 return "&";
3075 }
3076 }
3077 }
9d2c6865 3078 }
bd0865ec
GS
3079 return "&" if $proto and !$doneok; # too few args and no `;'
3080 return "&" if @args; # too many args
3081 return ("", join ", ", @reals);
3082}
3083
3084sub pp_entersub {
3085 my $self = shift;
3086 my($op, $cx) = @_;
3087 return $self->method($op, $cx) unless null $op->first->sibling;
3088 my $prefix = "";
3089 my $amper = "";
3090 my($kid, @exprs);
90c0eb26 3091 if ($op->flags & OPf_SPECIAL && !($op->flags & OPf_MOD)) {
9d2c6865
SM
3092 $prefix = "do ";
3093 } elsif ($op->private & OPpENTERSUB_AMPER) {
3094 $amper = "&";
3095 }
3096 $kid = $op->first;
3097 $kid = $kid->first->sibling; # skip ex-list, pushmark
3098 for (; not null $kid->sibling; $kid = $kid->sibling) {
3099 push @exprs, $kid;
3100 }
bd0865ec
GS
3101 my $simple = 0;
3102 my $proto = undef;
9d2c6865
SM
3103 if (is_scope($kid)) {
3104 $amper = "&";
3105 $kid = "{" . $self->deparse($kid, 0) . "}";
3f872cb9 3106 } elsif ($kid->first->name eq "gv") {
6f611a1a 3107 my $gv = $self->gv_or_padgv($kid->first);
9d2c6865
SM
3108 if (class($gv->CV) ne "SPECIAL") {
3109 $proto = $gv->CV->PV if $gv->CV->FLAGS & SVf_POK;
3110 }
bd0865ec 3111 $simple = 1; # only calls of named functions can be prototyped
9d2c6865 3112 $kid = $self->deparse($kid, 24);
90c0eb26 3113 } elsif (is_scalar ($kid->first) && $kid->first->name ne 'rv2cv') {
9d2c6865
SM
3114 $amper = "&";
3115 $kid = $self->deparse($kid, 24);
3116 } else {
3117 $prefix = "";
3ed82cfc
GS
3118 my $arrow = is_subscriptable($kid->first) ? "" : "->";
3119 $kid = $self->deparse($kid, 24) . $arrow;
9d2c6865 3120 }
0ca62a8e
RH
3121
3122 # Doesn't matter how many prototypes there are, if
3123 # they haven't happened yet!
1d38190f
RGS
3124 my $declared;
3125 {
3126 no strict 'refs';
3127 no warnings 'uninitialized';
3128 $declared = exists $self->{'subs_declared'}{$kid}
d989cdac 3129 || (
1d38190f
RGS
3130 defined &{ %{$self->{'curstash'}."::"}->{$kid} }
3131 && !exists
3132 $self->{'subs_deparsed'}{$self->{'curstash'}."::".$kid}
3133 && defined prototype $self->{'curstash'}."::".$kid
3134 );
3135 if (!$declared && defined($proto)) {
3136 # Avoid "too early to check prototype" warning
3137 ($amper, $proto) = ('&');
3138 }
e99ebc55 3139 }
0ca62a8e 3140
bd0865ec 3141 my $args;
0ca62a8e 3142 if ($declared and defined $proto and not $amper) {
bd0865ec
GS
3143 ($amper, $args) = $self->check_proto($proto, @exprs);
3144 if ($amper eq "&") {
9d2c6865
SM
3145 $args = join(", ", map($self->deparse($_, 6), @exprs));
3146 }
3147 } else {
3148 $args = join(", ", map($self->deparse($_, 6), @exprs));
6e90668e 3149 }
9d2c6865
SM
3150 if ($prefix or $amper) {
3151 if ($op->flags & OPf_STACKED) {
3152 return $prefix . $amper . $kid . "(" . $args . ")";
3153 } else {
3154 return $prefix . $amper. $kid;
3155 }
6e90668e 3156 } else {
34a48b4b 3157 # glob() invocations can be translated into calls of
d1be9408 3158 # CORE::GLOBAL::glob with a second parameter, a number.
34a48b4b
RH
3159 # Reverse this.
3160 if ($kid eq "CORE::GLOBAL::glob") {
3161 $kid = "glob";
3162 $args =~ s/\s*,[^,]+$//;
3163 }
3164
3165 # It's a syntax error to call CORE::GLOBAL::foo without a prefix,
3166 # so it must have been translated from a keyword call. Translate
3167 # it back.
3168 $kid =~ s/^CORE::GLOBAL:://;
3169
d989cdac 3170 my $dproto = defined($proto) ? $proto : "undefined";
0ca62a8e
RH
3171 if (!$declared) {
3172 return "$kid(" . $args . ")";
d989cdac 3173 } elsif ($dproto eq "") {
9d2c6865 3174 return $kid;
d989cdac
SM
3175 } elsif ($dproto eq "\$" and is_scalar($exprs[0])) {
3176 # is_scalar is an excessively conservative test here:
3177 # really, we should be comparing to the precedence of the
3178 # top operator of $exprs[0] (ala unop()), but that would
3179 # take some major code restructuring to do right.
9d2c6865 3180 return $self->maybe_parens_func($kid, $args, $cx, 16);
d989cdac 3181 } elsif ($dproto ne '$' and defined($proto) || $simple) { #'
9d2c6865
SM
3182 return $self->maybe_parens_func($kid, $args, $cx, 5);
3183 } else {
3184 return "$kid(" . $args . ")";
3185 }
6e90668e
SM
3186 }
3187}
3188
3189sub pp_enterwrite { unop(@_, "write") }
3190
3191# escape things that cause interpolation in double quotes,
3192# but not character escapes
3193sub uninterp {
3194 my($str) = @_;
3f766ba3 3195 $str =~ s/(^|\G|[^\\])((?:\\\\)*)([\$\@]|\\[uUlLQE])/$1$2\\$3/g;
9d2c6865
SM
3196 return $str;
3197}
3198
b7dad2dc
RH
3199{
3200my $bal;
3201BEGIN {
cdf8218f
RH
3202 use re "eval";
3203 # Matches any string which is balanced with respect to {braces}
b7dad2dc 3204 $bal = qr(
cdf8218f
RH
3205 (?:
3206 [^\\{}]
3207 | \\\\
3208 | \\[{}]
3209 | \{(??{$bal})\}
3210 )*
3211 )x;
b7dad2dc
RH
3212}
3213
3214# the same, but treat $|, $), $( and $ at the end of the string differently
3215sub re_uninterp {
3216 my($str) = @_;
cdf8218f
RH
3217
3218 $str =~ s/
3219 ( ^|\G # $1
3220 | [^\\]
3221 )
3222
3223 ( # $2
3224 (?:\\\\)*
3225 )
3226
3227 ( # $3
3228 (\(\?\??\{$bal\}\)) # $4
3229 | [\$\@]
3230 (?!\||\)|\(|$)
3231 | \\[uUlLQE]
3232 )
3233
2621462b 3234 /defined($4) && length($4) ? "$1$2$4" : "$1$2\\$3"/xeg;
cdf8218f 3235
6e90668e
SM
3236 return $str;
3237}
3238
b7dad2dc
RH
3239# This is for regular expressions with the /x modifier
3240# We have to leave comments unmangled.
a9760014 3241sub re_uninterp_extended {
b7dad2dc
RH
3242 my($str) = @_;
3243
3244 $str =~ s/
3245 ( ^|\G # $1
3246 | [^\\]
3247 )
3248
3249 ( # $2
3250 (?:\\\\)*
3251 )
3252
3253 ( # $3
3254 ( \(\?\??\{$bal\}\) # $4 (skip over (?{}) and (??{}) blocks)
3255 | \#[^\n]* # (skip over comments)
3256 )
3257 | [\$\@]
9a58b761 3258 (?!\||\)|\(|$|\s)
b7dad2dc
RH
3259 | \\[uUlLQE]
3260 )
3261
c7de4c66 3262 /defined($4) && length($4) ? "$1$2$4" : "$1$2\\$3"/xeg;
b7dad2dc 3263
a9760014
RH
3264 return $str;
3265}
b7dad2dc 3266}
a9760014 3267
57aa3c4e
JH
3268my %unctrl = # portable to to EBCDIC
3269 (
3270 "\c@" => '\c@', # unused
3271 "\cA" => '\cA',
3272 "\cB" => '\cB',
3273 "\cC" => '\cC',
3274 "\cD" => '\cD',
3275 "\cE" => '\cE',
3276 "\cF" => '\cF',
3277 "\cG" => '\cG',
3278 "\cH" => '\cH',
3279 "\cI" => '\cI',
3280 "\cJ" => '\cJ',
3281 "\cK" => '\cK',
3282 "\cL" => '\cL',
3283 "\cM" => '\cM',
3284 "\cN" => '\cN',
3285 "\cO" => '\cO',
3286 "\cP" => '\cP',
3287 "\cQ" => '\cQ',
3288 "\cR" => '\cR',
3289 "\cS" => '\cS',
3290 "\cT" => '\cT',
3291 "\cU" => '\cU',
3292 "\cV" => '\cV',
3293 "\cW" => '\cW',
3294 "\cX" => '\cX',
3295 "\cY" => '\cY',
3296 "\cZ" => '\cZ',
3297 "\c[" => '\c[', # unused
3298 "\c\\" => '\c\\', # unused
3299 "\c]" => '\c]', # unused
3300 "\c_" => '\c_', # unused
3301 );
3302
6e90668e 3303# character escapes, but not delimiters that might need to be escaped
746698c5 3304sub escape_str { # ASCII, UTF8
6e90668e 3305 my($str) = @_;
cef22867 3306 $str =~ s/(.)/ord($1) > 255 ? sprintf("\\x{%x}", ord($1)) : $1/eg;
6e90668e 3307 $str =~ s/\a/\\a/g;
d989cdac 3308# $str =~ s/\cH/\\b/g; # \b means something different in a regex
6e90668e
SM
3309 $str =~ s/\t/\\t/g;
3310 $str =~ s/\n/\\n/g;
3311 $str =~ s/\e/\\e/g;
3312 $str =~ s/\f/\\f/g;
3313 $str =~ s/\r/\\r/g;
fc132725 3314 $str =~ s/([\cA-\cZ])/$unctrl{$1}/ge;
cef22867 3315 $str =~ s/([[:^print:]])/sprintf("\\%03o", ord($1))/ge;
6e90668e
SM
3316 return $str;
3317}
3318
b7dad2dc
RH
3319# For regexes with the /x modifier.
3320# Leave whitespace unmangled.
a9760014
RH
3321sub escape_extended_re {
3322 my($str) = @_;
cef22867 3323 $str =~ s/(.)/ord($1) > 255 ? sprintf("\\x{%x}", ord($1)) : $1/eg;
aee8fd8d
RGS
3324 $str =~ s/([[:^print:]])/
3325 ($1 =~ y! \t\n!!) ? $1 : sprintf("\\%03o", ord($1))/ge;
a9760014
RH
3326 $str =~ s/\n/\n\f/g;
3327 return $str;
3328}
3329
9d2c6865
SM
3330# Don't do this for regexen
3331sub unback {
3332 my($str) = @_;
3333 $str =~ s/\\/\\\\/g;
3334 return $str;
3335}
3336
08c6f5ec
RH
3337# Remove backslashes which precede literal control characters,
3338# to avoid creating ambiguity when we escape the latter.
3339sub re_unback {
3340 my($str) = @_;
3341
3342 # the insane complexity here is due to the behaviour of "\c\"
cef22867 3343 $str =~ s/(^|[^\\]|\\c\\)(?<!\\c)\\(\\\\)*(?=[[:^print:]])/$1$2/g;
08c6f5ec
RH
3344 return $str;
3345}
3346
6e90668e
SM
3347sub balanced_delim {
3348 my($str) = @_;
3349 my @str = split //, $str;
3350 my($ar, $open, $close, $fail, $c, $cnt);
3351 for $ar (['[',']'], ['(',')'], ['<','>'], ['{','}']) {
3352 ($open, $close) = @$ar;
3353 $fail = 0; $cnt = 0;
3354 for $c (@str) {
3355 if ($c eq $open) {
3356 $cnt++;
3357 } elsif ($c eq $close) {
3358 $cnt--;
3359 if ($cnt < 0) {
bd0865ec 3360 # qq()() isn't ")("
6e90668e
SM
3361 $fail = 1;
3362 last;
3363 }
3364 }
3365 }
3366 $fail = 1 if $cnt != 0;
3367 return ($open, "$open$str$close") if not $fail;
3368 }
3369 return ("", $str);
3370}
3371
3372sub single_delim {
3373 my($q, $default, $str) = @_;
90be192f 3374 return "$default$str$default" if $default and index($str, $default) == -1;
8347ad86
RGS
3375 if ($q ne 'qr') {
3376 (my $succeed, $str) = balanced_delim($str);
3377 return "$q$str" if $succeed;
3378 }
3379 for my $delim ('/', '"', '#') {
6e90668e
SM
3380 return "$q$delim" . $str . $delim if index($str, $delim) == -1;
3381 }
90be192f
SM
3382 if ($default) {
3383 $str =~ s/$default/\\$default/g;
3384 return "$default$str$default";
3385 } else {
3386 $str =~ s[/][\\/]g;
3387 return "$q/$str/";
3388 }
6e90668e
SM
3389}
3390
d989cdac
SM
3391my $max_prec;
3392BEGIN { $max_prec = int(0.999 + 8*length(pack("F", 42))*log(2)/log(10)); }
3393
3394# Split a floating point number into an integer mantissa and a binary
3395# exponent. Assumes you've already made sure the number isn't zero or
3396# some weird infinity or NaN.
3397sub split_float {
3398 my($f) = @_;
3399 my $exponent = 0;
3400 if ($f == int($f)) {
3401 while ($f % 2 == 0) {
3402 $f /= 2;
3403 $exponent++;
3404 }
3405 } else {
3406 while ($f != int($f)) {
3407 $f *= 2;
3408 $exponent--;
3409 }
3410 }
3411 my $mantissa = sprintf("%.0f", $f);
3412 return ($mantissa, $exponent);
3413}
3414
6e90668e 3415sub const {
d989cdac
SM
3416 my $self = shift;
3417 my($sv, $cx) = @_;
3418 if ($self->{'use_dumper'}) {
3419 return $self->const_dumper($sv, $cx);
3420 }
6e90668e 3421 if (class($sv) eq "SPECIAL") {
d989cdac
SM
3422 # sv_undef, sv_yes, sv_no
3423 return ('undef', '1', $self->maybe_parens("!1", $cx, 21))[$$sv-1];
7a9b44b9
RH
3424 } elsif (class($sv) eq "NULL") {
3425 return 'undef';
127212b2
DM
3426 }
3427 # convert a version object into the "v1.2.3" string in its V magic
3428 if ($sv->FLAGS & SVs_RMG) {
3429 for (my $mg = $sv->MAGIC; $mg; $mg = $mg->MOREMAGIC) {
3430 return $mg->PTR if $mg->TYPE eq 'V';
3431 }
3432 }
3433
3434 if ($sv->FLAGS & SVf_IOK) {
d989cdac
SM
3435 my $str = $sv->int_value;
3436 $str = $self->maybe_parens($str, $cx, 21) if $str < 0;
3437 return $str;
6e90668e 3438 } elsif ($sv->FLAGS & SVf_NOK) {
d989cdac
SM
3439 my $nv = $sv->NV;
3440 if ($nv == 0) {
3441 if (pack("F", $nv) eq pack("F", 0)) {
3442 # positive zero
3443 return "0";
3444 } else {
3445 # negative zero
3446 return $self->maybe_parens("-.0", $cx, 21);
3447 }
3448 } elsif (1/$nv == 0) {
3449 if ($nv > 0) {
3450 # positive infinity
3451 return $self->maybe_parens("9**9**9", $cx, 22);
3452 } else {
3453 # negative infinity
3454 return $self->maybe_parens("-9**9**9", $cx, 21);
3455 }
3456 } elsif ($nv != $nv) {
3457 # NaN
3458 if (pack("F", $nv) eq pack("F", sin(9**9**9))) {
3459 # the normal kind
3460 return "sin(9**9**9)";
3461 } elsif (pack("F", $nv) eq pack("F", -sin(9**9**9))) {
3462 # the inverted kind
3463 return $self->maybe_parens("-sin(9**9**9)", $cx, 21);
3464 } else {
3465 # some other kind
3466 my $hex = unpack("h*", pack("F", $nv));
3467 return qq'unpack("F", pack("h*", "$hex"))';
3468 }
fecea806 3469 }
d989cdac
SM
3470 # first, try the default stringification
3471 my $str = "$nv";
3472 if ($str != $nv) {
3473 # failing that, try using more precision
3474 $str = sprintf("%.${max_prec}g", $nv);
3475# if (pack("F", $str) ne pack("F", $nv)) {
3476 if ($str != $nv) {
3477 # not representable in decimal with whatever sprintf()
3478 # and atof() Perl is using here.
3479 my($mant, $exp) = split_float($nv);
3480 return $self->maybe_parens("$mant * 2**$exp", $cx, 19);
3481 }
3482 }
3483 $str = $self->maybe_parens($str, $cx, 21) if $nv < 0;
3484 return $str;
7a9b44b9 3485 } elsif ($sv->FLAGS & SVf_ROK && $sv->can("RV")) {
d989cdac
SM
3486 my $ref = $sv->RV;
3487 if (class($ref) eq "AV") {
3488 return "[" . $self->list_const(2, $ref->ARRAY) . "]";
3489 } elsif (class($ref) eq "HV") {
3490 my %hash = $ref->ARRAY;
3491 my @elts;
3492 for my $k (sort keys %hash) {
3493 push @elts, "$k => " . $self->const($hash{$k}, 6);
3494 }
3495 return "{" . join(", ", @elts) . "}";
3496 } elsif (class($ref) eq "CV") {
3497 return "sub " . $self->deparse_sub($ref);
3498 }
3499 if ($ref->FLAGS & SVs_SMG) {
3500 for (my $mg = $ref->MAGIC; $mg; $mg = $mg->MOREMAGIC) {
3501 if ($mg->TYPE eq 'r') {
3502 my $re = re_uninterp(escape_str(re_unback($mg->precomp)));
3503 return single_delim("qr", "", $re);
3504 }
3505 }
3506 }
3507
3508 return $self->maybe_parens("\\" . $self->const($ref, 20), $cx, 20);
34768ba5 3509 } elsif ($sv->FLAGS & SVf_POK) {
6e90668e 3510 my $str = $sv->PV;
bd0865ec 3511 if ($str =~ /[^ -~]/) { # ASCII for non-printing
9d2c6865 3512 return single_delim("qq", '"', uninterp escape_str unback $str);
6e90668e 3513 } else {
bd0865ec 3514 return single_delim("q", "'", unback $str);
6e90668e 3515 }
34768ba5
RH
3516 } else {
3517 return "undef";
a798dbf2
MB
3518 }
3519}
3520
d989cdac
SM
3521sub const_dumper {
3522 my $self = shift;
3523 my($sv, $cx) = @_;
3524 my $ref = $sv->object_2svref();
3525 my $dumper = Data::Dumper->new([$$ref], ['$v']);
3526 $dumper->Purity(1)->Terse(1)->Deparse(1)->Indent(0)->Useqq(1)->Sortkeys(1);
3527 my $str = $dumper->Dump();
3528 if ($str =~ /^\$v/) {
3529 return '${my ' . $str . ' \$v}';
3530 } else {
3531 return $str;
3532 }
3533}
3534
18228111
GS
3535sub const_sv {
3536 my $self = shift;
3537 my $op = shift;
3538 my $sv = $op->sv;
3539 # the constant could be in the pad (under useithreads)
3540 $sv = $self->padval($op->targ) unless $$sv;
3541 return $sv;
3542}
3543
6e90668e
SM
3544sub pp_const {
3545 my $self = shift;
9d2c6865 3546 my($op, $cx) = @_;
7e40138b
RH
3547 if ($op->private & OPpCONST_ARYBASE) {
3548 return '$[';
3549 }
d989cdac 3550# if ($op->private & OPpCONST_BARE) { # trouble with `=>' autoquoting
18228111 3551# return $self->const_sv($op)->PV;
6e90668e 3552# }
18228111 3553 my $sv = $self->const_sv($op);
d989cdac 3554 return $self->const($sv, $cx);
6e90668e
SM
3555}
3556
3557sub dq {
3558 my $self = shift;
3559 my $op = shift;
3f872cb9
GS
3560 my $type = $op->name;
3561 if ($type eq "const") {
f3402b25
RH
3562 return '$[' if $op->private & OPpCONST_ARYBASE;
3563 return uninterp(escape_str(unback($self->const_sv($op)->as_string)));
3f872cb9 3564 } elsif ($type eq "concat") {
8fed1104
RH
3565 my $first = $self->dq($op->first);
3566 my $last = $self->dq($op->last);
44c6d2a1 3567
333f3d7a 3568 # Disambiguate "${foo}bar", "${foo}{bar}", "${foo}[1]", "$foo\::bar"
44c6d2a1
RH
3569 ($last =~ /^[A-Z\\\^\[\]_?]/ &&
3570 $first =~ s/([\$@])\^$/${1}{^}/) # "${^}W" etc
d989cdac 3571 || ($last =~ /^[:'{\[\w_]/ && #'
44c6d2a1
RH
3572