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Deparse our(LIST) correctly
[perl5.git] / lib / B / Deparse.pm
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6e90668e 1# B::Deparse.pm
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2# Copyright (c) 1998-2000, 2002, 2003, 2004, 2005, 2006 Stephen McCamant.
3# All rights reserved.
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4# This module is free software; you can redistribute and/or modify
5# it under the same terms as Perl itself.
6
7# This is based on the module of the same name by Malcolm Beattie,
8# but essentially none of his code remains.
9
a798dbf2 10package B::Deparse;
ff97752d 11use Carp;
51a5edaf 12use B qw(class main_root main_start main_cv svref_2object opnumber perlstring
bd0865ec 13 OPf_WANT OPf_WANT_VOID OPf_WANT_SCALAR OPf_WANT_LIST
2be95ceb 14 OPf_KIDS OPf_REF OPf_STACKED OPf_SPECIAL OPf_MOD
ce4e655d 15 OPpLVAL_INTRO OPpOUR_INTRO OPpENTERSUB_AMPER OPpSLICE OPpCONST_BARE
3ed82cfc 16 OPpTRANS_SQUASH OPpTRANS_DELETE OPpTRANS_COMPLEMENT OPpTARGET_MY
e1dccc0d 17 OPpEXISTS_SUB OPpSORT_NUMERIC OPpSORT_INTEGER
2be95ceb 18 OPpSORT_REVERSE
d989cdac 19 SVf_IOK SVf_NOK SVf_ROK SVf_POK SVpad_OUR SVf_FAKE SVs_RMG SVs_SMG
e95ab0c0 20 CVf_METHOD CVf_LVALUE
2be95ceb 21 PMf_KEEP PMf_GLOBAL PMf_CONTINUE PMf_EVAL PMf_ONCE
ff0cf12f 22 PMf_MULTILINE PMf_SINGLELINE PMf_FOLD PMf_EXTENDED);
a9ac5089 23$VERSION = '1.27';
a798dbf2 24use strict;
2ae48fff 25use vars qw/$AUTOLOAD/;
34a48b4b 26use warnings ();
149758b3 27require feature;
a798dbf2 28
aa381260 29BEGIN {
ff0cf12f 30 # List version-specific constants here.
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31 # Easiest way to keep this code portable between version looks to
32 # be to fake up a dummy constant that will never actually be true.
33 foreach (qw(OPpSORT_INPLACE OPpSORT_DESCEND OPpITER_REVERSED OPpCONST_NOVER
ff0cf12f 34 OPpPAD_STATE PMf_SKIPWHITE RXf_SKIPWHITE
b9bc576f 35 RXf_PMf_CHARSET RXf_PMf_KEEPCOPY
24fcb59f 36 CVf_LOCKED OPpREVERSE_INPLACE OPpSUBSTR_REPL_FIRST
7d789282 37 PMf_NONDESTRUCT OPpCONST_ARYBASE OPpEVAL_BYTES)) {
ff0cf12f 38 eval { import B $_ };
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39 no strict 'refs';
40 *{$_} = sub () {0} unless *{$_}{CODE};
41 }
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42}
43
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44# Changes between 0.50 and 0.51:
45# - fixed nulled leave with live enter in sort { }
46# - fixed reference constants (\"str")
47# - handle empty programs gracefully
c4a6f826 48# - handle infinite loops (for (;;) {}, while (1) {})
e38ccfd9 49# - differentiate between 'for my $x ...' and 'my $x; for $x ...'
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50# - various minor cleanups
51# - moved globals into an object
e38ccfd9 52# - added '-u', like B::C
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53# - package declarations using cop_stash
54# - subs, formats and code sorted by cop_seq
f6f9bdb7 55# Changes between 0.51 and 0.52:
4d1ff10f 56# - added pp_threadsv (special variables under USE_5005THREADS)
f6f9bdb7 57# - added documentation
bd0865ec 58# Changes between 0.52 and 0.53:
9d2c6865 59# - many changes adding precedence contexts and associativity
e38ccfd9 60# - added '-p' and '-s' output style options
9d2c6865 61# - various other minor fixes
bd0865ec 62# Changes between 0.53 and 0.54:
e38ccfd9 63# - added support for new 'for (1..100)' optimization,
d7f5b6da 64# thanks to Gisle Aas
bd0865ec 65# Changes between 0.54 and 0.55:
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66# - added support for new qr// construct
67# - added support for new pp_regcreset OP
bd0865ec 68# Changes between 0.55 and 0.56:
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69# - tested on base/*.t, cmd/*.t, comp/*.t, io/*.t
70# - fixed $# on non-lexicals broken in last big rewrite
71# - added temporary fix for change in opcode of OP_STRINGIFY
e38ccfd9 72# - fixed problem in 0.54's for() patch in 'for (@ary)'
f5aa8f4e 73# - fixed precedence in conditional of ?:
e38ccfd9 74# - tweaked list paren elimination in 'my($x) = @_'
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75# - made continue-block detection trickier wrt. null ops
76# - fixed various prototype problems in pp_entersub
77# - added support for sub prototypes that never get GVs
78# - added unquoting for special filehandle first arg in truncate
e38ccfd9 79# - print doubled rv2gv (a bug) as '*{*GV}' instead of illegal '**GV'
f5aa8f4e 80# - added semicolons at the ends of blocks
e38ccfd9 81# - added -l '#line' declaration option -- fixes cmd/subval.t 27,28
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82# Changes between 0.56 and 0.561:
83# - fixed multiply-declared my var in pp_truncate (thanks to Sarathy)
84# - used new B.pm symbolic constants (done by Nick Ing-Simmons)
85# Changes between 0.561 and 0.57:
86# - stylistic changes to symbolic constant stuff
87# - handled scope in s///e replacement code
88# - added unquote option for expanding "" into concats, etc.
89# - split method and proto parts of pp_entersub into separate functions
90# - various minor cleanups
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91# Changes after 0.57:
92# - added parens in \&foo (patch by Albert Dvornik)
93# Changes between 0.57 and 0.58:
e38ccfd9 94# - fixed '0' statements that weren't being printed
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95# - added methods for use from other programs
96# (based on patches from James Duncan and Hugo van der Sanden)
97# - added -si and -sT to control indenting (also based on a patch from Hugo)
98# - added -sv to print something else instead of '???'
99# - preliminary version of utf8 tr/// handling
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100# Changes after 0.58:
101# - uses of $op->ppaddr changed to new $op->name (done by Sarathy)
d989cdac 102# - added support for Hugo's new OP_SETSTATE (like nextstate)
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103# Changes between 0.58 and 0.59
104# - added support for Chip's OP_METHOD_NAMED
105# - added support for Ilya's OPpTARGET_MY optimization
e38ccfd9 106# - elided arrows before '()' subscripts when possible
58cccf98 107# Changes between 0.59 and 0.60
c4a6f826 108# - support for method attributes was added
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109# - some warnings fixed
110# - separate recognition of constant subs
c4a6f826 111# - rewrote continue block handling, now recognizing for loops
58cccf98 112# - added more control of expanding control structures
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113# Changes between 0.60 and 0.61 (mostly by Robin Houston)
114# - many bug-fixes
115# - support for pragmas and 'use'
116# - support for the little-used $[ variable
117# - support for __DATA__ sections
118# - UTF8 support
119# - BEGIN, CHECK, INIT and END blocks
120# - scoping of subroutine declarations fixed
121# - compile-time output from the input program can be suppressed, so that the
122# output is just the deparsed code. (a change to O.pm in fact)
123# - our() declarations
124# - *all* the known bugs are now listed in the BUGS section
125# - comprehensive test mechanism (TEST -deparse)
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126# Changes between 0.62 and 0.63 (mostly by Rafael Garcia-Suarez)
127# - bug-fixes
128# - new switch -P
129# - support for command-line switches (-l, -0, etc.)
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130# Changes between 0.63 and 0.64
131# - support for //, CHECK blocks, and assertions
132# - improved handling of foreach loops and lexicals
133# - option to use Data::Dumper for constants
134# - more bug fixes
135# - discovered lots more bugs not yet fixed
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136#
137# ...
138#
139# Changes between 0.72 and 0.73
140# - support new switch constructs
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141
142# Todo:
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143# (See also BUGS section at the end of this file)
144#
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145# - finish tr/// changes
146# - add option for even more parens (generalize \&foo change)
90be192f 147# - left/right context
58cccf98 148# - copy comments (look at real text with $^P?)
f5aa8f4e 149# - avoid semis in one-statement blocks
9d2c6865 150# - associativity of &&=, ||=, ?:
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151# - ',' => '=>' (auto-unquote?)
152# - break long lines ("\r" as discretionary break?)
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153# - configurable syntax highlighting: ANSI color, HTML, TeX, etc.
154# - more style options: brace style, hex vs. octal, quotes, ...
155# - print big ints as hex/octal instead of decimal (heuristic?)
e38ccfd9 156# - handle 'my $x if 0'?
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157# - version using op_next instead of op_first/sibling?
158# - avoid string copies (pass arrays, one big join?)
9d2c6865 159# - here-docs?
6e90668e 160
d989cdac 161# Current test.deparse failures
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162# comp/hints 6 - location of BEGIN blocks wrt. block openings
163# run/switchI 1 - missing -I switches entirely
164# perl -Ifoo -e 'print @INC'
165# op/caller 2 - warning mask propagates backwards before warnings::register
166# 'use warnings; BEGIN {${^WARNING_BITS} eq "U"x12;} use warnings::register'
167# op/getpid 2 - can't assign to shared my() declaration (threads only)
168# 'my $x : shared = 5'
c4a6f826 169# op/override 7 - parens on overridden require change v-string interpretation
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170# 'BEGIN{*CORE::GLOBAL::require=sub {}} require v5.6'
171# c.f. 'BEGIN { *f = sub {0} }; f 2'
172# op/pat 774 - losing Unicode-ness of Latin1-only strings
173# 'use charnames ":short"; $x="\N{latin:a with acute}"'
174# op/recurse 12 - missing parens on recursive call makes it look like method
175# 'sub f { f($x) }'
176# op/subst 90 - inconsistent handling of utf8 under "use utf8"
177# op/taint 29 - "use re 'taint'" deparsed in the wrong place wrt. block open
178# op/tiehandle compile - "use strict" deparsed in the wrong place
179# uni/tr_ several
180# ext/B/t/xref 11 - line numbers when we add newlines to one-line subs
181# ext/Data/Dumper/t/dumper compile
182# ext/DB_file/several
183# ext/Encode/several
184# ext/Ernno/Errno warnings
185# ext/IO/lib/IO/t/io_sel 23
186# ext/PerlIO/t/encoding compile
187# ext/POSIX/t/posix 6
188# ext/Socket/Socket 8
189# ext/Storable/t/croak compile
190# lib/Attribute/Handlers/t/multi compile
191# lib/bignum/ several
192# lib/charnames 35
193# lib/constant 32
194# lib/English 40
195# lib/ExtUtils/t/bytes 4
196# lib/File/DosGlob compile
197# lib/Filter/Simple/t/data 1
198# lib/Math/BigInt/t/constant 1
199# lib/Net/t/config Deparse-warning
200# lib/overload compile
201# lib/Switch/ several
202# lib/Symbol 4
203# lib/Test/Simple several
204# lib/Term/Complete
205# lib/Tie/File/t/29_downcopy 5
206# lib/vars 22
f5aa8f4e 207
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208# Object fields (were globals):
209#
210# avoid_local:
211# (local($a), local($b)) and local($a, $b) have the same internal
212# representation but the short form looks better. We notice we can
213# use a large-scale local when checking the list, but need to prevent
d989cdac 214# individual locals too. This hash holds the addresses of OPs that
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215# have already had their local-ness accounted for. The same thing
216# is done with my().
217#
218# curcv:
219# CV for current sub (or main program) being deparsed
220#
8510e997 221# curcvlex:
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222# Cached hash of lexical variables for curcv: keys are
223# names prefixed with "m" or "o" (representing my/our), and
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224# each value is an array of pairs, indicating the cop_seq of scopes
225# in which a var of that name is valid.
226#
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227# curcop:
228# COP for statement being deparsed
229#
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230# curstash:
231# name of the current package for deparsed code
232#
233# subs_todo:
34a48b4b 234# array of [cop_seq, CV, is_format?] for subs and formats we still
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235# want to deparse
236#
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237# protos_todo:
238# as above, but [name, prototype] for subs that never got a GV
239#
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240# subs_done, forms_done:
241# keys are addresses of GVs for subs and formats we've already
242# deparsed (or at least put into subs_todo)
9d2c6865 243#
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244# subs_declared
245# keys are names of subs for which we've printed declarations.
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246# That means we can omit parentheses from the arguments. It also means we
247# need to put CORE:: on core functions of the same name.
0ca62a8e 248#
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249# subs_deparsed
250# Keeps track of fully qualified names of all deparsed subs.
251#
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252# in_subst_repl
253# True when deparsing the replacement part of a substitution.
254#
9d2c6865 255# parens: -p
f5aa8f4e 256# linenums: -l
bd0865ec 257# unquote: -q
e38ccfd9 258# cuddle: ' ' or '\n', depending on -sC
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259# indent_size: -si
260# use_tabs: -sT
261# ex_const: -sv
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262
263# A little explanation of how precedence contexts and associativity
264# work:
265#
266# deparse() calls each per-op subroutine with an argument $cx (short
267# for context, but not the same as the cx* in the perl core), which is
268# a number describing the op's parents in terms of precedence, whether
f5aa8f4e 269# they're inside an expression or at statement level, etc. (see
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270# chart below). When ops with children call deparse on them, they pass
271# along their precedence. Fractional values are used to implement
e38ccfd9 272# associativity ('($x + $y) + $z' => '$x + $y + $y') and related
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273# parentheses hacks. The major disadvantage of this scheme is that
274# it doesn't know about right sides and left sides, so say if you
275# assign a listop to a variable, it can't tell it's allowed to leave
276# the parens off the listop.
277
278# Precedences:
279# 26 [TODO] inside interpolation context ("")
280# 25 left terms and list operators (leftward)
281# 24 left ->
282# 23 nonassoc ++ --
283# 22 right **
284# 21 right ! ~ \ and unary + and -
285# 20 left =~ !~
286# 19 left * / % x
287# 18 left + - .
288# 17 left << >>
289# 16 nonassoc named unary operators
290# 15 nonassoc < > <= >= lt gt le ge
291# 14 nonassoc == != <=> eq ne cmp
292# 13 left &
293# 12 left | ^
294# 11 left &&
295# 10 left ||
296# 9 nonassoc .. ...
297# 8 right ?:
298# 7 right = += -= *= etc.
299# 6 left , =>
300# 5 nonassoc list operators (rightward)
301# 4 right not
302# 3 left and
303# 2 left or xor
304# 1 statement modifiers
d989cdac 305# 0.5 statements, but still print scopes as do { ... }
9d2c6865 306# 0 statement level
93a8ff62 307# -1 format body
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308
309# Nonprinting characters with special meaning:
310# \cS - steal parens (see maybe_parens_unop)
311# \n - newline and indent
312# \t - increase indent
e38ccfd9 313# \b - decrease indent ('outdent')
f5aa8f4e 314# \f - flush left (no indent)
9d2c6865 315# \cK - kill following semicolon, if any
6e90668e 316
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317
318
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319BEGIN { for (qw[ const stringify rv2sv list glob pushmark null]) {
320 eval "sub OP_\U$_ () { " . opnumber($_) . "}"
321}}
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322
323# _pessimise_walk(): recursively walk the optree of a sub,
324# possibly undoing optimisations along the way.
325
326sub _pessimise_walk {
327 my ($self, $startop) = @_;
328
329 return unless $$startop;
330 my ($op, $prevop);
331 for ($op = $startop; $$op; $prevop = $op, $op = $op->sibling) {
332 my $ppname = $op->name;
333
334 # pessimisations start here
335
336 if ($ppname eq "padrange") {
337 # remove PADRANGE:
d5524600 338 # the original optimisation either (1) changed this:
a7fd8ef6 339 # pushmark -> (various pad and list and null ops) -> the_rest
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340 # or (2), for the = @_ case, changed this:
341 # pushmark -> gv[_] -> rv2av -> (pad stuff) -> the_rest
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342 # into this:
343 # padrange ----------------------------------------> the_rest
344 # so we just need to convert the padrange back into a
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345 # pushmark, and in case (1), set its op_next to op_sibling,
346 # which is the head of the original chain of optimised-away
347 # pad ops, or for (2), set it to sibling->first, which is
348 # the original gv[_].
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349
350 $B::overlay->{$$op} = {
76e14ed3 351 type => OP_PUSHMARK,
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352 name => 'pushmark',
353 private => ($op->private & OPpLVAL_INTRO),
d5524600
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354 next => ($op->flags & OPf_SPECIAL)
355 ? $op->sibling->first
356 : $op->sibling,
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357 };
358 }
359
360 # pessimisations end here
361
362 if (class($op) eq 'PMOP'
363 && ref($op->pmreplroot)
364 && ${$op->pmreplroot}
365 && $op->pmreplroot->isa( 'B::OP' ))
366 {
367 $self-> _pessimise_walk($op->pmreplroot);
368 }
369
370 if ($op->flags & OPf_KIDS) {
371 $self-> _pessimise_walk($op->first);
372 }
373
374 }
375}
376
377
378# _pessimise_walk_exe(): recursively walk the op_next chain of a sub,
379# possibly undoing optimisations along the way.
380
381sub _pessimise_walk_exe {
382 my ($self, $startop, $visited) = @_;
383
384 return unless $$startop;
385 return if $visited->{$$startop};
386 my ($op, $prevop);
387 for ($op = $startop; $$op; $prevop = $op, $op = $op->next) {
388 last if $visited->{$$op};
389 $visited->{$$op} = 1;
390 my $ppname = $op->name;
391 if ($ppname =~
392 /^((and|d?or)(assign)?|(map|grep)while|range|cond_expr|once)$/
393 # entertry is also a logop, but its op_other invariably points
394 # into the same chain as the main execution path, so we skip it
395 ) {
396 $self->_pessimise_walk_exe($op->other, $visited);
397 }
398 elsif ($ppname eq "subst") {
399 $self->_pessimise_walk_exe($op->pmreplstart, $visited);
400 }
401 elsif ($ppname =~ /^(enter(loop|iter))$/) {
402 # redoop and nextop will already be covered by the main block
403 # of the loop
404 $self->_pessimise_walk_exe($op->lastop, $visited);
405 }
406
407 # pessimisations start here
408 }
409}
410
e63cc694 411# Go through an optree and "remove" some optimisations by using an
a7fd8ef6
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412# overlay to selectively modify or un-null some ops. Deparsing in the
413# absence of those optimisations is then easier.
414#
415# Note that older optimisations are not removed, as Deparse was already
416# written to recognise them before the pessimise/overlay system was added.
417
418sub pessimise {
419 my ($self, $root, $start) = @_;
420
421 # walk tree in root-to-branch order
422 $self->_pessimise_walk($root);
423
424 my %visited;
425 # walk tree in execution order
426 $self->_pessimise_walk_exe($start, \%visited);
427}
428
429
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430sub null {
431 my $op = shift;
432 return class($op) eq "NULL";
433}
434
435sub todo {
436 my $self = shift;
34a48b4b 437 my($cv, $is_form) = @_;
e31885a0 438 return unless ($cv->FILE eq $0 || exists $self->{files}{$cv->FILE});
6e90668e 439 my $seq;
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440 if ($cv->OUTSIDE_SEQ) {
441 $seq = $cv->OUTSIDE_SEQ;
442 } elsif (!null($cv->START) and is_state($cv->START)) {
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443 $seq = $cv->START->cop_seq;
444 } else {
445 $seq = 0;
446 }
34a48b4b 447 push @{$self->{'subs_todo'}}, [$seq, $cv, $is_form];
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RGS
448 unless ($is_form || class($cv->STASH) eq 'SPECIAL') {
449 $self->{'subs_deparsed'}{$cv->STASH->NAME."::".$cv->GV->NAME} = 1;
450 }
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451}
452
453sub next_todo {
454 my $self = shift;
455 my $ent = shift @{$self->{'subs_todo'}};
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RH
456 my $cv = $ent->[1];
457 my $gv = $cv->GV;
458 my $name = $self->gv_name($gv);
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459 if ($ent->[2]) {
460 return "format $name =\n"
e31885a0 461 . $self->deparse_format($ent->[1]). "\n";
6e90668e 462 } else {
0ca62a8e 463 $self->{'subs_declared'}{$name} = 1;
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RH
464 if ($name eq "BEGIN") {
465 my $use_dec = $self->begin_is_use($cv);
d989cdac 466 if (defined ($use_dec) and $self->{'expand'} < 5) {
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RH
467 return () if 0 == length($use_dec);
468 return $use_dec;
469 }
34a48b4b 470 }
a0035eb8
RH
471 my $l = '';
472 if ($self->{'linenums'}) {
473 my $line = $gv->LINE;
474 my $file = $gv->FILE;
475 $l = "\n\f#line $line \"$file\"\n";
476 }
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DM
477 my $p = '';
478 if (class($cv->STASH) ne "SPECIAL") {
479 my $stash = $cv->STASH->NAME;
480 if ($stash ne $self->{'curstash'}) {
481 $p = "package $stash;\n";
482 $name = "$self->{'curstash'}::$name" unless $name =~ /::/;
483 $self->{'curstash'} = $stash;
484 }
8b2d6640 485 $name =~ s/^\Q$stash\E::(?!\z|.*::)//;
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DM
486 }
487 return "${p}${l}sub $name " . $self->deparse_sub($cv);
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RH
488 }
489}
490
491# Return a "use" declaration for this BEGIN block, if appropriate
492sub begin_is_use {
493 my ($self, $cv) = @_;
494 my $root = $cv->ROOT;
80dc0729 495 local @$self{qw'curcv curcvlex'} = ($cv);
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496 local $B::overlay = {};
497 $self->pessimise($root, $cv->START);
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RH
498#require B::Debug;
499#B::walkoptree($cv->ROOT, "debug");
500 my $lineseq = $root->first;
501 return if $lineseq->name ne "lineseq";
502
503 my $req_op = $lineseq->first->sibling;
504 return if $req_op->name ne "require";
505
506 my $module;
507 if ($req_op->first->private & OPpCONST_BARE) {
508 # Actually it should always be a bareword
509 $module = $self->const_sv($req_op->first)->PV;
510 $module =~ s[/][::]g;
511 $module =~ s/.pm$//;
512 }
513 else {
d989cdac 514 $module = $self->const($self->const_sv($req_op->first), 6);
34a48b4b
RH
515 }
516
517 my $version;
518 my $version_op = $req_op->sibling;
519 return if class($version_op) eq "NULL";
520 if ($version_op->name eq "lineseq") {
521 # We have a version parameter; skip nextstate & pushmark
522 my $constop = $version_op->first->next->next;
523
524 return unless $self->const_sv($constop)->PV eq $module;
525 $constop = $constop->sibling;
a58644de 526 $version = $self->const_sv($constop);
d989cdac
SM
527 if (class($version) eq "IV") {
528 $version = $version->int_value;
529 } elsif (class($version) eq "NV") {
530 $version = $version->NV;
531 } elsif (class($version) ne "PVMG") {
532 # Includes PVIV and PVNV
a58644de
RGS
533 $version = $version->PV;
534 } else {
535 # version specified as a v-string
536 $version = 'v'.join '.', map ord, split //, $version->PV;
537 }
34a48b4b
RH
538 $constop = $constop->sibling;
539 return if $constop->name ne "method_named";
540 return if $self->const_sv($constop)->PV ne "VERSION";
541 }
542
543 $lineseq = $version_op->sibling;
544 return if $lineseq->name ne "lineseq";
545 my $entersub = $lineseq->first->sibling;
546 if ($entersub->name eq "stub") {
547 return "use $module $version ();\n" if defined $version;
548 return "use $module ();\n";
549 }
550 return if $entersub->name ne "entersub";
551
552 # See if there are import arguments
553 my $args = '';
554
6ec152c3
RH
555 my $svop = $entersub->first->sibling; # Skip over pushmark
556 return unless $self->const_sv($svop)->PV eq $module;
34a48b4b
RH
557
558 # Pull out the arguments
6ec152c3
RH
559 for ($svop=$svop->sibling; $svop->name ne "method_named";
560 $svop = $svop->sibling) {
34a48b4b 561 $args .= ", " if length($args);
6ec152c3 562 $args .= $self->deparse($svop, 6);
34a48b4b
RH
563 }
564
565 my $use = 'use';
6ec152c3 566 my $method_named = $svop;
34a48b4b
RH
567 return if $method_named->name ne "method_named";
568 my $method_name = $self->const_sv($method_named)->PV;
569
570 if ($method_name eq "unimport") {
571 $use = 'no';
572 }
573
574 # Certain pragmas are dealt with using hint bits,
575 # so we ignore them here
576 if ($module eq 'strict' || $module eq 'integer'
0ced6c29
RGS
577 || $module eq 'bytes' || $module eq 'warnings'
578 || $module eq 'feature') {
34a48b4b
RH
579 return "";
580 }
581
582 if (defined $version && length $args) {
583 return "$use $module $version ($args);\n";
584 } elsif (defined $version) {
585 return "$use $module $version;\n";
586 } elsif (length $args) {
587 return "$use $module ($args);\n";
588 } else {
589 return "$use $module;\n";
6e90668e
SM
590 }
591}
592
6e90668e 593sub stash_subs {
894e98ac 594 my ($self, $pack, $seen) = @_;
34a48b4b
RH
595 my (@ret, $stash);
596 if (!defined $pack) {
597 $pack = '';
598 $stash = \%::;
f5aa8f4e 599 }
34a48b4b
RH
600 else {
601 $pack =~ s/(::)?$/::/;
602 no strict 'refs';
d1dc589d 603 $stash = \%{"main::$pack"};
34a48b4b 604 }
894e98ac
FC
605 return
606 if ($seen ||= {})->{
607 $INC{"overload.pm"} ? overload::StrVal($stash) : $stash
608 }++;
34a48b4b
RH
609 my %stash = svref_2object($stash)->ARRAY;
610 while (my ($key, $val) = each %stash) {
f5aa8f4e
SM
611 my $class = class($val);
612 if ($class eq "PV") {
a0035eb8
RH
613 # Just a prototype. As an ugly but fairly effective way
614 # to find out if it belongs here is to see if the AUTOLOAD
615 # (if any) for the stash was defined in one of our files.
616 my $A = $stash{"AUTOLOAD"};
617 if (defined ($A) && class($A) eq "GV" && defined($A->CV)
618 && class($A->CV) eq "CV") {
619 my $AF = $A->FILE;
620 next unless $AF eq $0 || exists $self->{'files'}{$AF};
621 }
f5aa8f4e 622 push @{$self->{'protos_todo'}}, [$pack . $key, $val->PV];
5b4ee549 623 } elsif ($class eq "IV" && !($val->FLAGS & SVf_ROK)) {
a0035eb8 624 # Just a name. As above.
5b4ee549
NC
625 # But skip proxy constant subroutines, as some form of perl-space
626 # visible code must have created them, be it a use statement, or
627 # some direct symbol-table manipulation code that we will Deparse
a0035eb8
RH
628 my $A = $stash{"AUTOLOAD"};
629 if (defined ($A) && class($A) eq "GV" && defined($A->CV)
630 && class($A->CV) eq "CV") {
631 my $AF = $A->FILE;
632 next unless $AF eq $0 || exists $self->{'files'}{$AF};
633 }
d989cdac 634 push @{$self->{'protos_todo'}}, [$pack . $key, undef];
f5aa8f4e 635 } elsif ($class eq "GV") {
34a48b4b 636 if (class(my $cv = $val->CV) ne "SPECIAL") {
f5aa8f4e 637 next if $self->{'subs_done'}{$$val}++;
e31885a0 638 next if $$val != ${$cv->GV}; # Ignore imposters
8510e997 639 $self->todo($cv, 0);
f5aa8f4e 640 }
e31885a0 641 if (class(my $cv = $val->FORM) ne "SPECIAL") {
f5aa8f4e 642 next if $self->{'forms_done'}{$$val}++;
e31885a0
RH
643 next if $$val != ${$cv->GV}; # Ignore imposters
644 $self->todo($cv, 1);
f5aa8f4e 645 }
34a48b4b 646 if (class($val->HV) ne "SPECIAL" && $key =~ /::$/) {
74cd21ba 647 $self->stash_subs($pack . $key, $seen);
34a48b4b 648 }
6e90668e
SM
649 }
650 }
651}
a798dbf2 652
f5aa8f4e
SM
653sub print_protos {
654 my $self = shift;
655 my $ar;
656 my @ret;
657 foreach $ar (@{$self->{'protos_todo'}}) {
658 my $proto = (defined $ar->[1] ? " (". $ar->[1] . ")" : "");
659 push @ret, "sub " . $ar->[0] . "$proto;\n";
660 }
661 delete $self->{'protos_todo'};
662 return @ret;
663}
664
9d2c6865
SM
665sub style_opts {
666 my $self = shift;
667 my $opts = shift;
668 my $opt;
669 while (length($opt = substr($opts, 0, 1))) {
670 if ($opt eq "C") {
671 $self->{'cuddle'} = " ";
f4a44678
SM
672 $opts = substr($opts, 1);
673 } elsif ($opt eq "i") {
674 $opts =~ s/^i(\d+)//;
675 $self->{'indent_size'} = $1;
676 } elsif ($opt eq "T") {
677 $self->{'use_tabs'} = 1;
678 $opts = substr($opts, 1);
679 } elsif ($opt eq "v") {
680 $opts =~ s/^v([^.]*)(.|$)//;
681 $self->{'ex_const'} = $1;
9d2c6865 682 }
9d2c6865
SM
683 }
684}
685
f4a44678
SM
686sub new {
687 my $class = shift;
688 my $self = bless {}, $class;
f4a44678 689 $self->{'cuddle'} = "\n";
d989cdac
SM
690 $self->{'curcop'} = undef;
691 $self->{'curstash'} = "main";
692 $self->{'ex_const'} = "'???'";
793e2a70 693 $self->{'expand'} = 0;
d989cdac
SM
694 $self->{'files'} = {};
695 $self->{'indent_size'} = 4;
793e2a70
RH
696 $self->{'linenums'} = 0;
697 $self->{'parens'} = 0;
d989cdac
SM
698 $self->{'subs_todo'} = [];
699 $self->{'unquote'} = 0;
700 $self->{'use_dumper'} = 0;
701 $self->{'use_tabs'} = 0;
08c6f5ec 702
bc6b2ef6 703 $self->{'ambient_arybase'} = 0;
e31885a0 704 $self->{'ambient_warnings'} = undef; # Assume no lexical warnings
a0405c92 705 $self->{'ambient_hints'} = 0;
0ced6c29 706 $self->{'ambient_hinthash'} = undef;
08c6f5ec
RH
707 $self->init();
708
f4a44678 709 while (my $arg = shift @_) {
d989cdac
SM
710 if ($arg eq "-d") {
711 $self->{'use_dumper'} = 1;
712 require Data::Dumper;
713 } elsif ($arg =~ /^-f(.*)/) {
34a48b4b 714 $self->{'files'}{$1} = 1;
d989cdac
SM
715 } elsif ($arg eq "-l") {
716 $self->{'linenums'} = 1;
f4a44678
SM
717 } elsif ($arg eq "-p") {
718 $self->{'parens'} = 1;
acaaef34
RGS
719 } elsif ($arg eq "-P") {
720 $self->{'noproto'} = 1;
f4a44678
SM
721 } elsif ($arg eq "-q") {
722 $self->{'unquote'} = 1;
723 } elsif (substr($arg, 0, 2) eq "-s") {
724 $self->style_opts(substr $arg, 2);
58cccf98
SM
725 } elsif ($arg =~ /^-x(\d)$/) {
726 $self->{'expand'} = $1;
f4a44678
SM
727 }
728 }
729 return $self;
730}
731
810aef70
RH
732{
733 # Mask out the bits that L<warnings::register> uses
734 my $WARN_MASK;
735 BEGIN {
736 $WARN_MASK = $warnings::Bits{all} | $warnings::DeadBits{all};
737 }
738 sub WARN_MASK () {
739 return $WARN_MASK;
740 }
34a48b4b
RH
741}
742
08c6f5ec
RH
743# Initialise the contextual information, either from
744# defaults provided with the ambient_pragmas method,
745# or from perl's own defaults otherwise.
746sub init {
747 my $self = shift;
748
bc6b2ef6 749 $self->{'arybase'} = $self->{'ambient_arybase'};
e31885a0
RH
750 $self->{'warnings'} = defined ($self->{'ambient_warnings'})
751 ? $self->{'ambient_warnings'} & WARN_MASK
752 : undef;
d5ec2987 753 $self->{'hints'} = $self->{'ambient_hints'};
e412117e 754 $self->{'hints'} &= 0xFF if $] < 5.009;
0ced6c29 755 $self->{'hinthash'} = $self->{'ambient_hinthash'};
217aba5d
RH
756
757 # also a convenient place to clear out subs_declared
758 delete $self->{'subs_declared'};
08c6f5ec
RH
759}
760
a798dbf2 761sub compile {
6e90668e 762 my(@args) = @_;
d989cdac 763 return sub {
f4a44678 764 my $self = B::Deparse->new(@args);
d2bc402e
RGS
765 # First deparse command-line args
766 if (defined $^I) { # deparse -i
51a5edaf 767 print q(BEGIN { $^I = ).perlstring($^I).qq(; }\n);
d2bc402e
RGS
768 }
769 if ($^W) { # deparse -w
770 print qq(BEGIN { \$^W = $^W; }\n);
771 }
772 if ($/ ne "\n" or defined $O::savebackslash) { # deparse -l and -0
51a5edaf
RGS
773 my $fs = perlstring($/) || 'undef';
774 my $bs = perlstring($O::savebackslash) || 'undef';
d2bc402e
RGS
775 print qq(BEGIN { \$/ = $fs; \$\\ = $bs; }\n);
776 }
34a48b4b 777 my @BEGINs = B::begin_av->isa("B::AV") ? B::begin_av->ARRAY : ();
676456c2
AG
778 my @UNITCHECKs = B::unitcheck_av->isa("B::AV")
779 ? B::unitcheck_av->ARRAY
780 : ();
ece599bd 781 my @CHECKs = B::check_av->isa("B::AV") ? B::check_av->ARRAY : ();
34a48b4b
RH
782 my @INITs = B::init_av->isa("B::AV") ? B::init_av->ARRAY : ();
783 my @ENDs = B::end_av->isa("B::AV") ? B::end_av->ARRAY : ();
676456c2 784 for my $block (@BEGINs, @UNITCHECKs, @CHECKs, @INITs, @ENDs) {
e31885a0 785 $self->todo($block, 0);
34a48b4b
RH
786 }
787 $self->stash_subs();
d989cdac
SM
788 local($SIG{"__DIE__"}) =
789 sub {
790 if ($self->{'curcop'}) {
791 my $cop = $self->{'curcop'};
792 my($line, $file) = ($cop->line, $cop->file);
793 print STDERR "While deparsing $file near line $line,\n";
794 }
795 };
6e90668e 796 $self->{'curcv'} = main_cv;
8510e997 797 $self->{'curcvlex'} = undef;
f5aa8f4e 798 print $self->print_protos;
6e90668e 799 @{$self->{'subs_todo'}} =
f4a44678 800 sort {$a->[0] <=> $b->[0]} @{$self->{'subs_todo'}};
a7fd8ef6
DM
801 my $root = main_root;
802 local $B::overlay = {};
803 unless (null $root) {
804 $self->pessimise($root, main_start);
805 print $self->indent($self->deparse_root($root)), "\n";
806 }
6e90668e
SM
807 my @text;
808 while (scalar(@{$self->{'subs_todo'}})) {
809 push @text, $self->next_todo;
810 }
6f611a1a 811 print $self->indent(join("", @text)), "\n" if @text;
e31885a0
RH
812
813 # Print __DATA__ section, if necessary
814 no strict 'refs';
96c57f7e
RGS
815 my $laststash = defined $self->{'curcop'}
816 ? $self->{'curcop'}->stash->NAME : $self->{'curstash'};
817 if (defined *{$laststash."::DATA"}{IO}) {
127212b2
DM
818 print "package $laststash;\n"
819 unless $laststash eq $self->{'curstash'};
e31885a0 820 print "__DATA__\n";
96c57f7e 821 print readline(*{$laststash."::DATA"});
e31885a0 822 }
a798dbf2 823 }
a798dbf2
MB
824}
825
f4a44678
SM
826sub coderef2text {
827 my $self = shift;
828 my $sub = shift;
0853f172 829 croak "Usage: ->coderef2text(CODEREF)" unless UNIVERSAL::isa($sub, "CODE");
08c6f5ec
RH
830
831 $self->init();
f4a44678
SM
832 return $self->indent($self->deparse_sub(svref_2object($sub)));
833}
834
415d4c68 835my %strict_bits = do {
d1718a7c 836 local $^H;
415d4c68
FC
837 map +($_ => strict::bits($_)), qw/refs subs vars/
838};
839
08c6f5ec
RH
840sub ambient_pragmas {
841 my $self = shift;
bc6b2ef6 842 my ($arybase, $hint_bits, $warning_bits, $hinthash) = (0, 0);
08c6f5ec
RH
843
844 while (@_ > 1) {
845 my $name = shift();
846 my $val = shift();
847
848 if ($name eq 'strict') {
849 require strict;
850
851 if ($val eq 'none') {
415d4c68 852 $hint_bits &= $strict_bits{$_} for qw/refs subs vars/;
08c6f5ec
RH
853 next();
854 }
855
856 my @names;
857 if ($val eq "all") {
858 @names = qw/refs subs vars/;
859 }
860 elsif (ref $val) {
861 @names = @$val;
862 }
863 else {
a0405c92 864 @names = split' ', $val;
08c6f5ec 865 }
415d4c68 866 $hint_bits |= $strict_bits{$_} for @names;
08c6f5ec
RH
867 }
868
bc6b2ef6
Z
869 elsif ($name eq '$[') {
870 if (OPpCONST_ARYBASE) {
871 $arybase = $val;
872 } else {
873 croak "\$[ can't be non-zero on this perl" unless $val == 0;
874 }
875 }
876
a0405c92
RH
877 elsif ($name eq 'integer'
878 || $name eq 'bytes'
879 || $name eq 'utf8') {
880 require "$name.pm";
08c6f5ec 881 if ($val) {
a0405c92
RH
882 $hint_bits |= ${$::{"${name}::"}{"hint_bits"}};
883 }
884 else {
885 $hint_bits &= ~${$::{"${name}::"}{"hint_bits"}};
886 }
887 }
888
889 elsif ($name eq 're') {
890 require re;
891 if ($val eq 'none') {
2570cdf1 892 $hint_bits &= ~re::bits(qw/taint eval/);
a0405c92
RH
893 next();
894 }
895
896 my @names;
897 if ($val eq 'all') {
2570cdf1 898 @names = qw/taint eval/;
a0405c92
RH
899 }
900 elsif (ref $val) {
901 @names = @$val;
08c6f5ec
RH
902 }
903 else {
a0405c92 904 @names = split' ',$val;
08c6f5ec 905 }
a0405c92 906 $hint_bits |= re::bits(@names);
08c6f5ec
RH
907 }
908
909 elsif ($name eq 'warnings') {
08c6f5ec 910 if ($val eq 'none') {
810aef70 911 $warning_bits = $warnings::NONE;
08c6f5ec
RH
912 next();
913 }
914
915 my @names;
916 if (ref $val) {
917 @names = @$val;
918 }
919 else {
920 @names = split/\s+/, $val;
921 }
922
810aef70 923 $warning_bits = $warnings::NONE if !defined ($warning_bits);
08c6f5ec
RH
924 $warning_bits |= warnings::bits(@names);
925 }
926
927 elsif ($name eq 'warning_bits') {
928 $warning_bits = $val;
929 }
930
931 elsif ($name eq 'hint_bits') {
932 $hint_bits = $val;
933 }
934
0ced6c29
RGS
935 elsif ($name eq '%^H') {
936 $hinthash = $val;
937 }
938
08c6f5ec
RH
939 else {
940 croak "Unknown pragma type: $name";
941 }
942 }
943 if (@_) {
944 croak "The ambient_pragmas method expects an even number of args";
945 }
946
bc6b2ef6 947 $self->{'ambient_arybase'} = $arybase;
08c6f5ec 948 $self->{'ambient_warnings'} = $warning_bits;
a0405c92 949 $self->{'ambient_hints'} = $hint_bits;
0ced6c29 950 $self->{'ambient_hinthash'} = $hinthash;
08c6f5ec
RH
951}
952
d989cdac 953# This method is the inner loop, so try to keep it simple
6e90668e
SM
954sub deparse {
955 my $self = shift;
d989cdac 956 my($op, $cx) = @_;
34a48b4b
RH
957
958 Carp::confess("Null op in deparse") if !defined($op)
959 || class($op) eq "NULL";
3f872cb9 960 my $meth = "pp_" . $op->name;
9d2c6865 961 return $self->$meth($op, $cx);
a798dbf2
MB
962}
963
6e90668e 964sub indent {
f4a44678 965 my $self = shift;
6e90668e
SM
966 my $txt = shift;
967 my @lines = split(/\n/, $txt);
968 my $leader = "";
f4a44678 969 my $level = 0;
6e90668e
SM
970 my $line;
971 for $line (@lines) {
f4a44678
SM
972 my $cmd = substr($line, 0, 1);
973 if ($cmd eq "\t" or $cmd eq "\b") {
974 $level += ($cmd eq "\t" ? 1 : -1) * $self->{'indent_size'};
975 if ($self->{'use_tabs'}) {
976 $leader = "\t" x ($level / 8) . " " x ($level % 8);
977 } else {
978 $leader = " " x $level;
979 }
6e90668e
SM
980 $line = substr($line, 1);
981 }
f2734596 982 if (index($line, "\f") > 0) {
983 $line =~ s/\f/\n/;
984 }
f5aa8f4e
SM
985 if (substr($line, 0, 1) eq "\f") {
986 $line = substr($line, 1); # no indent
987 } else {
988 $line = $leader . $line;
989 }
9d2c6865 990 $line =~ s/\cK;?//g;
6e90668e
SM
991 }
992 return join("\n", @lines);
993}
994
6e90668e
SM
995sub deparse_sub {
996 my $self = shift;
997 my $cv = shift;
998 my $proto = "";
ce4e655d 999Carp::confess("NULL in deparse_sub") if !defined($cv) || $cv->isa("B::NULL");
34a48b4b
RH
1000Carp::confess("SPECIAL in deparse_sub") if $cv->isa("B::SPECIAL");
1001 local $self->{'curcop'} = $self->{'curcop'};
6e90668e
SM
1002 if ($cv->FLAGS & SVf_POK) {
1003 $proto = "(". $cv->PV . ") ";
1004 }
aa381260 1005 if ($cv->CvFLAGS & (CVf_METHOD|CVf_LOCKED|CVf_LVALUE)) {
6aaf4108
SC
1006 $proto .= ": ";
1007 $proto .= "lvalue " if $cv->CvFLAGS & CVf_LVALUE;
aa381260 1008 $proto .= "locked " if $cv->CvFLAGS & CVf_LOCKED;
6aaf4108
SC
1009 $proto .= "method " if $cv->CvFLAGS & CVf_METHOD;
1010 }
1011
6e90668e 1012 local($self->{'curcv'}) = $cv;
8510e997 1013 local($self->{'curcvlex'});
0ced6c29
RGS
1014 local(@$self{qw'curstash warnings hints hinthash'})
1015 = @$self{qw'curstash warnings hints hinthash'};
ce4e655d 1016 my $body;
a7fd8ef6
DM
1017 my $root = $cv->ROOT;
1018 local $B::overlay = {};
1019 if (not null $root) {
1020 $self->pessimise($root, $cv->START);
1021 my $lineseq = $root->first;
ce4e655d
RH
1022 if ($lineseq->name eq "lineseq") {
1023 my @ops;
1024 for(my$o=$lineseq->first; $$o; $o=$o->sibling) {
1025 push @ops, $o;
1026 }
93a8ff62 1027 $body = $self->lineseq(undef, 0, @ops).";";
ce4e655d
RH
1028 my $scope_en = $self->find_scope_en($lineseq);
1029 if (defined $scope_en) {
1030 my $subs = join"", $self->seq_subs($scope_en);
1031 $body .= ";\n$subs" if length($subs);
1032 }
1033 }
1034 else {
a7fd8ef6 1035 $body = $self->deparse($root->first, 0);
ce4e655d 1036 }
de3f1649 1037 }
ce4e655d
RH
1038 else {
1039 my $sv = $cv->const_sv;
1040 if ($$sv) {
1041 # uh-oh. inlinable sub... format it differently
d989cdac 1042 return $proto . "{ " . $self->const($sv, 0) . " }\n";
ce4e655d
RH
1043 } else { # XSUB? (or just a declaration)
1044 return "$proto;\n";
1045 }
6e90668e 1046 }
ce4e655d 1047 return $proto ."{\n\t$body\n\b}" ."\n";
6e90668e
SM
1048}
1049
1050sub deparse_format {
1051 my $self = shift;
1052 my $form = shift;
1053 my @text;
1054 local($self->{'curcv'}) = $form;
8510e997 1055 local($self->{'curcvlex'});
67fc2416 1056 local($self->{'in_format'}) = 1;
0ced6c29
RGS
1057 local(@$self{qw'curstash warnings hints hinthash'})
1058 = @$self{qw'curstash warnings hints hinthash'};
6e90668e 1059 my $op = $form->ROOT;
a7fd8ef6
DM
1060 local $B::overlay = {};
1061 $self->pessimise($op, $form->START);
6e90668e 1062 my $kid;
fb725297
RGS
1063 return "\f." if $op->first->name eq 'stub'
1064 || $op->first->name eq 'nextstate';
6e90668e
SM
1065 $op = $op->first->first; # skip leavewrite, lineseq
1066 while (not null $op) {
1067 $op = $op->sibling; # skip nextstate
1068 my @exprs;
1069 $kid = $op->first->sibling; # skip pushmark
a5b0cd91 1070 push @text, "\f".$self->const_sv($kid)->PV;
6e90668e
SM
1071 $kid = $kid->sibling;
1072 for (; not null $kid; $kid = $kid->sibling) {
93a8ff62 1073 push @exprs, $self->deparse($kid, -1);
31c26a0a 1074 $exprs[-1] =~ s/;\z//;
6e90668e 1075 }
a5b0cd91 1076 push @text, "\f".join(", ", @exprs)."\n" if @exprs;
6e90668e
SM
1077 $op = $op->sibling;
1078 }
a5b0cd91 1079 return join("", @text) . "\f.";
6e90668e
SM
1080}
1081
6e90668e 1082sub is_scope {
a798dbf2 1083 my $op = shift;
3f872cb9
GS
1084 return $op->name eq "leave" || $op->name eq "scope"
1085 || $op->name eq "lineseq"
d989cdac 1086 || ($op->name eq "null" && class($op) eq "UNOP"
3f872cb9 1087 && (is_scope($op->first) || $op->first->name eq "enter"));
6e90668e
SM
1088}
1089
1090sub is_state {
3f872cb9
GS
1091 my $name = $_[0]->name;
1092 return $name eq "nextstate" || $name eq "dbstate" || $name eq "setstate";
6e90668e
SM
1093}
1094
e38ccfd9 1095sub is_miniwhile { # check for one-line loop ('foo() while $y--')
6e90668e 1096 my $op = shift;
d989cdac 1097 return (!null($op) and null($op->sibling)
3f872cb9
GS
1098 and $op->name eq "null" and class($op) eq "UNOP"
1099 and (($op->first->name =~ /^(and|or)$/
1100 and $op->first->first->sibling->name eq "lineseq")
1101 or ($op->first->name eq "lineseq"
6e90668e 1102 and not null $op->first->first->sibling
3f872cb9 1103 and $op->first->first->sibling->name eq "unstack")
6e90668e
SM
1104 ));
1105}
1106
d989cdac
SM
1107# Check if the op and its sibling are the initialization and the rest of a
1108# for (..;..;..) { ... } loop
1109sub is_for_loop {
1110 my $op = shift;
1111 # This OP might be almost anything, though it won't be a
1112 # nextstate. (It's the initialization, so in the canonical case it
eae48c89
Z
1113 # will be an sassign.) The sibling is (old style) a lineseq whose
1114 # first child is a nextstate and whose second is a leaveloop, or
1115 # (new style) an unstack whose sibling is a leaveloop.
d989cdac 1116 my $lseq = $op->sibling;
eae48c89
Z
1117 return 0 unless !is_state($op) and !null($lseq);
1118 if ($lseq->name eq "lineseq") {
d989cdac
SM
1119 if ($lseq->first && !null($lseq->first) && is_state($lseq->first)
1120 && (my $sib = $lseq->first->sibling)) {
1121 return (!null($sib) && $sib->name eq "leaveloop");
1122 }
eae48c89
Z
1123 } elsif ($lseq->name eq "unstack" && ($lseq->flags & OPf_SPECIAL)) {
1124 my $sib = $lseq->sibling;
1125 return $sib && !null($sib) && $sib->name eq "leaveloop";
d989cdac
SM
1126 }
1127 return 0;
1128}
1129
6e90668e
SM
1130sub is_scalar {
1131 my $op = shift;
3f872cb9
GS
1132 return ($op->name eq "rv2sv" or
1133 $op->name eq "padsv" or
1134 $op->name eq "gv" or # only in array/hash constructs
bd0865ec 1135 $op->flags & OPf_KIDS && !null($op->first)
3f872cb9 1136 && $op->first->name eq "gvsv");
6e90668e
SM
1137}
1138
9d2c6865
SM
1139sub maybe_parens {
1140 my $self = shift;
1141 my($text, $cx, $prec) = @_;
1142 if ($prec < $cx # unary ops nest just fine
1143 or $prec == $cx and $cx != 4 and $cx != 16 and $cx != 21
1144 or $self->{'parens'})
1145 {
1146 $text = "($text)";
1147 # In a unop, let parent reuse our parens; see maybe_parens_unop
1148 $text = "\cS" . $text if $cx == 16;
1149 return $text;
1150 } else {
1151 return $text;
1152 }
1153}
1154
e38ccfd9 1155# same as above, but get around the 'if it looks like a function' rule
9d2c6865
SM
1156sub maybe_parens_unop {
1157 my $self = shift;
1158 my($name, $kid, $cx) = @_;
1159 if ($cx > 16 or $self->{'parens'}) {
a0035eb8
RH
1160 $kid = $self->deparse($kid, 1);
1161 if ($name eq "umask" && $kid =~ /^\d+$/) {
1162 $kid = sprintf("%#o", $kid);
1163 }
4a1ac32e 1164 return $self->keyword($name) . "($kid)";
9d2c6865
SM
1165 } else {
1166 $kid = $self->deparse($kid, 16);
a0035eb8
RH
1167 if ($name eq "umask" && $kid =~ /^\d+$/) {
1168 $kid = sprintf("%#o", $kid);
1169 }
4a1ac32e 1170 $name = $self->keyword($name);
9d2c6865
SM
1171 if (substr($kid, 0, 1) eq "\cS") {
1172 # use kid's parens
1173 return $name . substr($kid, 1);
1174 } elsif (substr($kid, 0, 1) eq "(") {
1175 # avoid looks-like-a-function trap with extra parens
e38ccfd9 1176 # ('+' can lead to ambiguities)
9d2c6865
SM
1177 return "$name(" . $kid . ")";
1178 } else {
1179 return "$name $kid";
1180 }
1181 }
1182}
1183
1184sub maybe_parens_func {
1185 my $self = shift;
1186 my($func, $text, $cx, $prec) = @_;
1187 if ($prec <= $cx or substr($text, 0, 1) eq "(" or $self->{'parens'}) {
1188 return "$func($text)";
1189 } else {
1190 return "$func $text";
1191 }
1192}
1193
6e90668e
SM
1194sub maybe_local {
1195 my $self = shift;
9d2c6865 1196 my($op, $cx, $text) = @_;
ce4e655d 1197 my $our_intro = ($op->name =~ /^(gv|rv2)[ash]v$/) ? OPpOUR_INTRO : 0;
66786896 1198 if ($op->private & (OPpLVAL_INTRO|$our_intro)) {
ce4e655d 1199 my $our_local = ($op->private & OPpLVAL_INTRO) ? "local" : "our";
8e3542b6 1200 if( $our_local eq 'our' ) {
640d5d41
FC
1201 if ( $text !~ /^\W(\w+::)*\w+\z/
1202 and !utf8::decode($text) || $text !~ /^\W(\w+::)*\w+\z/
1203 ) {
1204 die "Unexpected our($text)\n";
1205 }
d989cdac 1206 $text =~ s/(\w+::)+//;
8e3542b6 1207 }
66786896 1208 return $text if $self->{'avoid_local'}{$$op};
e8d3f51b 1209 if (want_scalar($op)) {
ce4e655d 1210 return "$our_local $text";
e8d3f51b 1211 } else {
ce4e655d 1212 return $self->maybe_parens_func("$our_local", $text, $cx, 16);
e8d3f51b 1213 }
6e90668e
SM
1214 } else {
1215 return $text;
a798dbf2 1216 }
a798dbf2
MB
1217}
1218
3ed82cfc
GS
1219sub maybe_targmy {
1220 my $self = shift;
1221 my($op, $cx, $func, @args) = @_;
1222 if ($op->private & OPpTARGET_MY) {
1223 my $var = $self->padname($op->targ);
1224 my $val = $func->($self, $op, 7, @args);
1225 return $self->maybe_parens("$var = $val", $cx, 7);
1226 } else {
1227 return $func->($self, $op, $cx, @args);
1228 }
1229}
1230
6e90668e
SM
1231sub padname_sv {
1232 my $self = shift;
1233 my $targ = shift;
d989cdac 1234 return $self->{'curcv'}->PADLIST->ARRAYelt(0)->ARRAYelt($targ);
6e90668e
SM
1235}
1236
1237sub maybe_my {
1238 my $self = shift;
4da9a2ca 1239 my($op, $cx, $text, $forbid_parens) = @_;
4c1f658f 1240 if ($op->private & OPpLVAL_INTRO and not $self->{'avoid_local'}{$$op}) {
80e3f4ad
FC
1241 my $my = $op->private & OPpPAD_STATE
1242 ? $self->keyword("state")
1243 : "my";
4da9a2ca 1244 if ($forbid_parens || want_scalar($op)) {
3462b4ac 1245 return "$my $text";
e8d3f51b 1246 } else {
3462b4ac 1247 return $self->maybe_parens_func($my, $text, $cx, 16);
e8d3f51b 1248 }
6e90668e
SM
1249 } else {
1250 return $text;
1251 }
1252}
1253
9d2c6865
SM
1254# The following OPs don't have functions:
1255
1256# pp_padany -- does not exist after parsing
9d2c6865 1257
2ae48fff
RGS
1258sub AUTOLOAD {
1259 if ($AUTOLOAD =~ s/^.*::pp_//) {
1260 warn "unexpected OP_".uc $AUTOLOAD;
1261 return "XXX";
1262 } else {
1263 die "Undefined subroutine $AUTOLOAD called";
1264 }
9d2c6865 1265}
6e90668e 1266
611c1e95
IZ
1267sub DESTROY {} # Do not AUTOLOAD
1268
ce4e655d
RH
1269# $root should be the op which represents the root of whatever
1270# we're sequencing here. If it's undefined, then we don't append
1271# any subroutine declarations to the deparsed ops, otherwise we
1272# append appropriate declarations.
58cccf98 1273sub lineseq {
93a8ff62 1274 my($self, $root, $cx, @ops) = @_;
58cccf98 1275 my($expr, @exprs);
ce4e655d
RH
1276
1277 my $out_cop = $self->{'curcop'};
1278 my $out_seq = defined($out_cop) ? $out_cop->cop_seq : undef;
1279 my $limit_seq;
1280 if (defined $root) {
1281 $limit_seq = $out_seq;
76df5e8f
DM
1282 my $nseq;
1283 $nseq = $self->find_scope_st($root->sibling) if ${$root->sibling};
ce4e655d
RH
1284 $limit_seq = $nseq if !defined($limit_seq)
1285 or defined($nseq) && $nseq < $limit_seq;
1286 }
1287 $limit_seq = $self->{'limit_seq'}
1288 if defined($self->{'limit_seq'})
1289 && (!defined($limit_seq) || $self->{'limit_seq'} < $limit_seq);
1290 local $self->{'limit_seq'} = $limit_seq;
09d856fb
CK
1291
1292 $self->walk_lineseq($root, \@ops,
1293 sub { push @exprs, $_[0]} );
1294
93a8ff62
FC
1295 my $sep = $cx ? '; ' : ";\n";
1296 my $body = join($sep, grep {length} @exprs);
ce4e655d 1297 my $subs = "";
67fc2416 1298 if (defined $root && defined $limit_seq && !$self->{'in_format'}) {
ce4e655d
RH
1299 $subs = join "\n", $self->seq_subs($limit_seq);
1300 }
93a8ff62 1301 return join($sep, grep {length} $body, $subs);
6e90668e
SM
1302}
1303
58cccf98 1304sub scopeop {
d989cdac 1305 my($real_block, $self, $op, $cx) = @_;
58cccf98
SM
1306 my $kid;
1307 my @kids;
a0405c92 1308
0ced6c29
RGS
1309 local(@$self{qw'curstash warnings hints hinthash'})
1310 = @$self{qw'curstash warnings hints hinthash'} if $real_block;
58cccf98
SM
1311 if ($real_block) {
1312 $kid = $op->first->sibling; # skip enter
1313 if (is_miniwhile($kid)) {
1314 my $top = $kid->first;
1315 my $name = $top->name;
1316 if ($name eq "and") {
1317 $name = "while";
1318 } elsif ($name eq "or") {
1319 $name = "until";
1320 } else { # no conditional -> while 1 or until 0
1321 return $self->deparse($top->first, 1) . " while 1";
1322 }
1323 my $cond = $top->first;
1324 my $body = $cond->sibling->first; # skip lineseq
1325 $cond = $self->deparse($cond, 1);
1326 $body = $self->deparse($body, 1);
1327 return "$body $name $cond";
6e90668e 1328 }
58cccf98
SM
1329 } else {
1330 $kid = $op->first;
1331 }
1332 for (; !null($kid); $kid = $kid->sibling) {
1333 push @kids, $kid;
6e90668e 1334 }
d989cdac 1335 if ($cx > 0) { # inside an expression, (a do {} while for lineseq)
73582821
AC
1336 my $body = $self->lineseq($op, 0, @kids);
1337 return is_lexical_subs(@kids) ? $body : "do {\n\t$body\n\b}";
9d2c6865 1338 } else {
93a8ff62 1339 my $lineseq = $self->lineseq($op, $cx, @kids);
7a9b44b9 1340 return (length ($lineseq) ? "$lineseq;" : "");
6e90668e 1341 }
6e90668e
SM
1342}
1343
ce4e655d 1344sub pp_scope { scopeop(0, @_); }
58cccf98
SM
1345sub pp_lineseq { scopeop(0, @_); }
1346sub pp_leave { scopeop(1, @_); }
9d2c6865 1347
d989cdac
SM
1348# This is a special case of scopeop and lineseq, for the case of the
1349# main_root. The difference is that we print the output statements as
1350# soon as we get them, for the sake of impatient users.
1351sub deparse_root {
1352 my $self = shift;
1353 my($op) = @_;
0ced6c29
RGS
1354 local(@$self{qw'curstash warnings hints hinthash'})
1355 = @$self{qw'curstash warnings hints hinthash'};
d989cdac 1356 my @kids;
4ca8de37 1357 return if null $op->first; # Can happen, e.g., for Bytecode without -k
d989cdac
SM
1358 for (my $kid = $op->first->sibling; !null($kid); $kid = $kid->sibling) {
1359 push @kids, $kid;
1360 }
09d856fb
CK
1361 $self->walk_lineseq($op, \@kids,
1362 sub { print $self->indent($_[0].';');
1363 print "\n" unless $_[1] == $#kids;
1364 });
1365}
1366
1367sub walk_lineseq {
1368 my ($self, $op, $kids, $callback) = @_;
1369 my @kids = @$kids;
d989cdac
SM
1370 for (my $i = 0; $i < @kids; $i++) {
1371 my $expr = "";
1372 if (is_state $kids[$i]) {
09d856fb 1373 $expr = $self->deparse($kids[$i++], 0);
d989cdac 1374 if ($i > $#kids) {
09d856fb 1375 $callback->($expr, $i);
d989cdac
SM
1376 last;
1377 }
1378 }
1379 if (is_for_loop($kids[$i])) {
eae48c89
Z
1380 $callback->($expr . $self->for_loop($kids[$i], 0),
1381 $i += $kids[$i]->sibling->name eq "unstack" ? 2 : 1);
d989cdac
SM
1382 next;
1383 }
1384 $expr .= $self->deparse($kids[$i], (@kids != 1)/2);
1385 $expr =~ s/;\n?\z//;
09d856fb 1386 $callback->($expr, $i);
d989cdac
SM
1387 }
1388}
1389
6e90668e
SM
1390# The BEGIN {} is used here because otherwise this code isn't executed
1391# when you run B::Deparse on itself.
1392my %globalnames;
1393BEGIN { map($globalnames{$_}++, "SIG", "STDIN", "STDOUT", "STDERR", "INC",
1394 "ENV", "ARGV", "ARGVOUT", "_"); }
1395
1396sub gv_name {
1397 my $self = shift;
1398 my $gv = shift;
b89b7257 1399 my $raw = shift;
c6e79e55 1400Carp::confess() unless ref($gv) eq "B::GV";
6e90668e 1401 my $stash = $gv->STASH->NAME;
b89b7257 1402 my $name = $raw ? $gv->NAME : $gv->SAFENAME;
8b2d6640
FC
1403 if ($stash eq 'main' && $name =~ /^::/) {
1404 $stash = '::';
1405 }
b861b87f
FC
1406 elsif (($stash eq 'main'
1407 && ($globalnames{$name} || $name =~ /^[^A-Za-z_:]/))
8b2d6640
FC
1408 or ($stash eq $self->{'curstash'} && !$globalnames{$name}
1409 && ($stash eq 'main' || $name !~ /::/))
b861b87f 1410 )
9d2c6865 1411 {
6e90668e
SM
1412 $stash = "";
1413 } else {
1414 $stash = $stash . "::";
a798dbf2 1415 }
b89b7257 1416 if (!$raw and $name =~ /^(\^..|{)/) {
083bda02 1417 $name = "{$name}"; # ${^WARNING_BITS}, etc and ${
6e90668e
SM
1418 }
1419 return $stash . $name;
a798dbf2
MB
1420}
1421
8510e997 1422# Return the name to use for a stash variable.
415d4c68
FC
1423# If a lexical with the same name is in scope, or
1424# if strictures are enabled, it may need to be
8510e997
RH
1425# fully-qualified.
1426sub stash_variable {
bb8996b8 1427 my ($self, $prefix, $name, $cx) = @_;
8510e997
RH
1428
1429 return "$prefix$name" if $name =~ /::/;
1430
d989cdac 1431 unless ($prefix eq '$' || $prefix eq '@' || #'
8510e997
RH
1432 $prefix eq '%' || $prefix eq '$#') {
1433 return "$prefix$name";
1434 }
1435
61154ac0
FC
1436 if ($name =~ /^[^\w+-]$/) {
1437 if (defined $cx && $cx == 26) {
1438 if ($prefix eq '@') {
bb8996b8
HY
1439 return "$prefix\{$name}";
1440 }
61154ac0
FC
1441 elsif ($name eq '#') { return '${#}' } # "${#}a" vs "$#a"
1442 }
1443 if ($prefix eq '$#') {
6ec73527 1444 return "\$#{$name}";
61154ac0 1445 }
6ec73527 1446 }
bb8996b8 1447
415d4c68 1448 return $prefix . $self->maybe_qualify($prefix, $name);
8510e997
RH
1449}
1450
be6cf5cf
FC
1451# Return just the name, without the prefix. It may be returned as a quoted
1452# string. The second return value is a boolean indicating that.
1453sub stash_variable_name {
1454 my($self, $prefix, $gv) = @_;
1455 my $name = $self->gv_name($gv, 1);
415d4c68 1456 $name = $self->maybe_qualify($prefix,$name);
be6cf5cf
FC
1457 if ($name =~ /^(?:\S|(?!\d)[\ca-\cz]?(?:\w|::)*|\d+)\z/) {
1458 $name =~ s/^([\ca-\cz])/'^'.($1|'@')/e;
1459 $name =~ /^(\^..|{)/ and $name = "{$name}";
1460 return $name, 0; # not quoted
1461 }
1462 else {
1463 single_delim("q", "'", $name), 1;
1464 }
1465}
1466
415d4c68
FC
1467sub maybe_qualify {
1468 my ($self,$prefix,$name) = @_;
1469 my $v = ($prefix eq '$#' ? '@' : $prefix) . $name;
1470 return $name if !$prefix || $name =~ /::/;
1471 return $self->{'curstash'}.'::'. $name
1472 if
36727b53
FC
1473 $name =~ /^(?!\d)\w/ # alphabetic
1474 && $v !~ /^\$[ab]\z/ # not $a or $b
415d4c68
FC
1475 && !$globalnames{$name} # not a global name
1476 && $self->{hints} & $strict_bits{vars} # strict vars
1477 && !$self->lex_in_scope($v,1) # no "our"
1478 or $self->lex_in_scope($v); # conflicts with "my" variable
1479 return $name;
1480}
1481
8510e997 1482sub lex_in_scope {
415d4c68
FC
1483 my ($self, $name, $our) = @_;
1484 substr $name, 0, 0, = $our ? 'o' : 'm'; # our/my
8510e997
RH
1485 $self->populate_curcvlex() if !defined $self->{'curcvlex'};
1486
6ec152c3 1487 return 0 if !defined($self->{'curcop'});
8510e997
RH
1488 my $seq = $self->{'curcop'}->cop_seq;
1489 return 0 if !exists $self->{'curcvlex'}{$name};
1490 for my $a (@{$self->{'curcvlex'}{$name}}) {
1491 my ($st, $en) = @$a;
1492 return 1 if $seq > $st && $seq <= $en;
1493 }
1494 return 0;
1495}
1496
1497sub populate_curcvlex {
1498 my $self = shift;
ce4e655d 1499 for (my $cv = $self->{'curcv'}; class($cv) eq "CV"; $cv = $cv->OUTSIDE) {
7dafbf52
DM
1500 my $padlist = $cv->PADLIST;
1501 # an undef CV still in lexical chain
1502 next if class($padlist) eq "SPECIAL";
1503 my @padlist = $padlist->ARRAY;
8510e997
RH
1504 my @ns = $padlist[0]->ARRAY;
1505
1506 for (my $i=0; $i<@ns; ++$i) {
1507 next if class($ns[$i]) eq "SPECIAL";
0f2fe21d
RH
1508 if (class($ns[$i]) eq "PV") {
1509 # Probably that pesky lexical @_
1510 next;
1511 }
8510e997 1512 my $name = $ns[$i]->PVX;
7dafbf52
DM
1513 my ($seq_st, $seq_en) =
1514 ($ns[$i]->FLAGS & SVf_FAKE)
1515 ? (0, 999999)
809abb02 1516 : ($ns[$i]->COP_SEQ_RANGE_LOW, $ns[$i]->COP_SEQ_RANGE_HIGH);
8510e997 1517
415d4c68
FC
1518 push @{$self->{'curcvlex'}{
1519 ($ns[$i]->FLAGS & SVpad_OUR ? 'o' : 'm') . $name
1520 }}, [$seq_st, $seq_en];
8510e997
RH
1521 }
1522 }
1523}
1524
ce4e655d
RH
1525sub find_scope_st { ((find_scope(@_))[0]); }
1526sub find_scope_en { ((find_scope(@_))[1]); }
1527
1528# Recurses down the tree, looking for pad variable introductions and COPs
1529sub find_scope {
1530 my ($self, $op, $scope_st, $scope_en) = @_;
ff97752d 1531 carp("Undefined op in find_scope") if !defined $op;
ce4e655d
RH
1532 return ($scope_st, $scope_en) unless $op->flags & OPf_KIDS;
1533
b6b46d6f
AB
1534 my @queue = ($op);
1535 while(my $op = shift @queue ) {
1536 for (my $o=$op->first; $$o; $o=$o->sibling) {
1537 if ($o->name =~ /^pad.v$/ && $o->private & OPpLVAL_INTRO) {
1538 my $s = int($self->padname_sv($o->targ)->COP_SEQ_RANGE_LOW);
1539 my $e = $self->padname_sv($o->targ)->COP_SEQ_RANGE_HIGH;
1540 $scope_st = $s if !defined($scope_st) || $s < $scope_st;
1541 $scope_en = $e if !defined($scope_en) || $e > $scope_en;
1542 return ($scope_st, $scope_en);
1543 }
1544 elsif (is_state($o)) {
1545 my $c = $o->cop_seq;
1546 $scope_st = $c if !defined($scope_st) || $c < $scope_st;
1547 $scope_en = $c if !defined($scope_en) || $c > $scope_en;
1548 return ($scope_st, $scope_en);
1549 }
1550 elsif ($o->flags & OPf_KIDS) {
1551 unshift (@queue, $o);
1552 }
34a48b4b
RH
1553 }
1554 }
ce4e655d
RH
1555
1556 return ($scope_st, $scope_en);
34a48b4b
RH
1557}
1558
1559# Returns a list of subs which should be inserted before the COP
1560sub cop_subs {
1561 my ($self, $op, $out_seq) = @_;
1562 my $seq = $op->cop_seq;
1563 # If we have nephews, then our sequence number indicates
1564 # the cop_seq of the end of some sort of scope.
1565 if (class($op->sibling) ne "NULL" && $op->sibling->flags & OPf_KIDS
ce4e655d
RH
1566 and my $nseq = $self->find_scope_st($op->sibling) ) {
1567 $seq = $nseq;
34a48b4b
RH
1568 }
1569 $seq = $out_seq if defined($out_seq) && $out_seq < $seq;
1570 return $self->seq_subs($seq);
1571}
1572
1573sub seq_subs {
1574 my ($self, $seq) = @_;
1575 my @text;
1576#push @text, "# ($seq)\n";
1577
ce4e655d 1578 return "" if !defined $seq;
34a48b4b
RH
1579 while (scalar(@{$self->{'subs_todo'}})
1580 and $seq > $self->{'subs_todo'}[0][0]) {
1581 push @text, $self->next_todo;
1582 }
1583 return @text;
1584}
1585
95c04cde
NC
1586sub _features_from_bundle {
1587 my ($hints, $hh) = @_;
1873980a 1588 foreach (@{$feature::feature_bundle{@feature::hint_bundles[$hints >> $feature::hint_shift]}}) {
95c04cde
NC
1589 $hh->{$feature::feature{$_}} = 1;
1590 }
1591 return $hh;
1592}
1593
08c6f5ec 1594# Notice how subs and formats are inserted between statements here;
bc6b2ef6 1595# also $[ assignments and pragmas.
6e90668e
SM
1596sub pp_nextstate {
1597 my $self = shift;
9d2c6865 1598 my($op, $cx) = @_;
34a48b4b 1599 $self->{'curcop'} = $op;
6e90668e 1600 my @text;
34a48b4b 1601 push @text, $self->cop_subs($op);
11faa288 1602 my $stash = $op->stashpv;
6e90668e
SM
1603 if ($stash ne $self->{'curstash'}) {
1604 push @text, "package $stash;\n";
1605 $self->{'curstash'} = $stash;
1606 }
08c6f5ec 1607
bc6b2ef6
Z
1608 if (OPpCONST_ARYBASE && $self->{'arybase'} != $op->arybase) {
1609 push @text, '$[ = '. $op->arybase .";\n";
1610 $self->{'arybase'} = $op->arybase;
1611 }
1612
7a9b44b9
RH
1613 my $warnings = $op->warnings;
1614 my $warning_bits;
1615 if ($warnings->isa("B::SPECIAL") && $$warnings == 4) {
810aef70 1616 $warning_bits = $warnings::Bits{"all"} & WARN_MASK;
7a9b44b9 1617 }
e31885a0 1618 elsif ($warnings->isa("B::SPECIAL") && $$warnings == 5) {
810aef70 1619 $warning_bits = $warnings::NONE;
7a9b44b9 1620 }
e31885a0
RH
1621 elsif ($warnings->isa("B::SPECIAL")) {
1622 $warning_bits = undef;
1623 }
7a9b44b9 1624 else {
34a48b4b 1625 $warning_bits = $warnings->PV & WARN_MASK;
7a9b44b9
RH
1626 }
1627
e31885a0
RH
1628 if (defined ($warning_bits) and
1629 !defined($self->{warnings}) || $self->{'warnings'} ne $warning_bits) {
08c6f5ec 1630 push @text, declare_warnings($self->{'warnings'}, $warning_bits);
7a9b44b9
RH
1631 $self->{'warnings'} = $warning_bits;
1632 }
1633
2be95ceb 1634 my $hints = $] < 5.008009 ? $op->private : $op->hints;
0bb01b05 1635 my $old_hints = $self->{'hints'};
2be95ceb
NC
1636 if ($self->{'hints'} != $hints) {
1637 push @text, declare_hints($self->{'hints'}, $hints);
1638 $self->{'hints'} = $hints;
a0405c92
RH
1639 }
1640
0bb01b05
FC
1641 my $newhh;
1642 if ($] > 5.009) {
1643 $newhh = $op->hints_hash->HASH;
1644 }
1645
1646 if ($] >= 5.015006) {
1647 # feature bundle hints
149758b3
NC
1648 my $from = $old_hints & $feature::hint_mask;
1649 my $to = $ hints & $feature::hint_mask;
0bb01b05 1650 if ($from != $to) {
149758b3 1651 if ($to == $feature::hint_mask) {
0bb01b05
FC
1652 if ($self->{'hinthash'}) {
1653 delete $self->{'hinthash'}{$_}
1654 for grep /^feature_/, keys %{$self->{'hinthash'}};
1655 }
1656 else { $self->{'hinthash'} = {} }
95c04cde
NC
1657 $self->{'hinthash'}
1658 = _features_from_bundle($from, $self->{'hinthash'});
0bb01b05
FC
1659 }
1660 else {
1661 my $bundle =
1662 $feature::hint_bundles[$to >> $feature::hint_shift];
1663 $bundle =~ s/(\d[13579])\z/$1+1/e; # 5.11 => 5.12
1664 push @text, "no feature;\n",
1665 "use feature ':$bundle';\n";
1666 }
1667 }
1668 }
1669
1670 if ($] > 5.009) {
1671 push @text, declare_hinthash(
1672 $self->{'hinthash'}, $newhh,
1673 $self->{indent_size}, $self->{hints},
1674 );
1675 $self->{'hinthash'} = $newhh;
0ced6c29
RGS
1676 }
1677
d989cdac
SM
1678 # This should go after of any branches that add statements, to
1679 # increase the chances that it refers to the same line it did in
1680 # the original program.
1681 if ($self->{'linenums'}) {
1682 push @text, "\f#line " . $op->line .
1683 ' "' . $op->file, qq'"\n';
1684 }
1685
98a1a137
Z
1686 push @text, $op->label . ": " if $op->label;
1687
6e90668e
SM
1688 return join("", @text);
1689}
1690
08c6f5ec
RH
1691sub declare_warnings {
1692 my ($from, $to) = @_;
e6f1f756 1693 if (($to & WARN_MASK) eq (warnings::bits("all") & WARN_MASK)) {
a0405c92
RH
1694 return "use warnings;\n";
1695 }
e6f1f756 1696 elsif (($to & WARN_MASK) eq ("\0"x length($to) & WARN_MASK)) {
a0405c92
RH
1697 return "no warnings;\n";
1698 }
51a5edaf 1699 return "BEGIN {\${^WARNING_BITS} = ".perlstring($to)."}\n";
a0405c92
RH
1700}
1701
1702sub declare_hints {
1703 my ($from, $to) = @_;
a0035eb8
RH
1704 my $use = $to & ~$from;
1705 my $no = $from & ~$to;
1706 my $decls = "";
1707 for my $pragma (hint_pragmas($use)) {
1708 $decls .= "use $pragma;\n";
1709 }
1710 for my $pragma (hint_pragmas($no)) {
1711 $decls .= "no $pragma;\n";
1712 }
1713 return $decls;
1714}
1715
493c23c6
NC
1716# Internal implementation hints that the core sets automatically, so don't need
1717# (or want) to be passed back to the user
1718my %ignored_hints = (
1719 'open<' => 1,
1720 'open>' => 1,
dca6062a 1721 ':' => 1,
1c74777c
FC
1722 'strict/refs' => 1,
1723 'strict/subs' => 1,
1724 'strict/vars' => 1,
2e8342de 1725);
493c23c6 1726
a8095af7
FC
1727my %rev_feature;
1728
0ced6c29 1729sub declare_hinthash {
0bb01b05 1730 my ($from, $to, $indent, $hints) = @_;
a8095af7 1731 my $doing_features =
149758b3 1732 ($hints & $feature::hint_mask) == $feature::hint_mask;
0ced6c29 1733 my @decls;
a8095af7
FC
1734 my @features;
1735 my @unfeatures; # bugs?
0bb01b05 1736 for my $key (sort keys %$to) {
493c23c6 1737 next if $ignored_hints{$key};
a8095af7
FC
1738 my $is_feature = $key =~ /^feature_/ && $^V ge 5.15.6;
1739 next if $is_feature and not $doing_features;
04be0204 1740 if (!exists $from->{$key} or $from->{$key} ne $to->{$key}) {
a8095af7 1741 push(@features, $key), next if $is_feature;
035146a3
FC
1742 push @decls,
1743 qq(\$^H{) . single_delim("q", "'", $key) . qq(} = )
1744 . (
1745 defined $to->{$key}
1746 ? single_delim("q", "'", $to->{$key})
1747 : 'undef'
1748 )
04be0204 1749 . qq(;);
0ced6c29
RGS
1750 }
1751 }
0bb01b05 1752 for my $key (sort keys %$from) {
493c23c6 1753 next if $ignored_hints{$key};
a8095af7
FC
1754 my $is_feature = $key =~ /^feature_/ && $^V ge 5.15.6;
1755 next if $is_feature and not $doing_features;
0ced6c29 1756 if (!exists $to->{$key}) {
a8095af7 1757 push(@unfeatures, $key), next if $is_feature;
0ced6c29
RGS
1758 push @decls, qq(delete \$^H{'$key'};);
1759 }
1760 }
a8095af7
FC
1761 my @ret;
1762 if (@features || @unfeatures) {
a8095af7
FC
1763 if (!%rev_feature) { %rev_feature = reverse %feature::feature }
1764 }
1765 if (@features) {
1766 push @ret, "use feature "
1767 . join(", ", map "'$rev_feature{$_}'", @features) . ";\n";
1768 }
1769 if (@unfeatures) {
1770 push @ret, "no feature "
1771 . join(", ", map "'$rev_feature{$_}'", @unfeatures)
1772 . ";\n";
1773 }
1774 @decls and
1775 push @ret,
1776 join("\n" . (" " x $indent), "BEGIN {", @decls) . "\n}\n";
1777 return @ret;
0ced6c29
RGS
1778}
1779
a0035eb8
RH
1780sub hint_pragmas {
1781 my ($bits) = @_;
415d4c68 1782 my (@pragmas, @strict);
a0035eb8 1783 push @pragmas, "integer" if $bits & 0x1;
415d4c68
FC
1784 for (sort keys %strict_bits) {
1785 push @strict, "'$_'" if $bits & $strict_bits{$_};
1786 }
1787 if (@strict == keys %strict_bits) {
1788 push @pragmas, "strict";
1789 }
1790 elsif (@strict) {
1791 push @pragmas, "strict " . join ', ', @strict;
1792 }
a0035eb8
RH
1793 push @pragmas, "bytes" if $bits & 0x8;
1794 return @pragmas;
08c6f5ec
RH
1795}
1796
6e90668e 1797sub pp_dbstate { pp_nextstate(@_) }
3f872cb9 1798sub pp_setstate { pp_nextstate(@_) }
6e90668e
SM
1799
1800sub pp_unstack { return "" } # see also leaveloop
1801
80e3f4ad
FC
1802my %feature_keywords = (
1803 # keyword => 'feature',
1804 state => 'state',
1805 say => 'say',
1806 given => 'switch',
1807 when => 'switch',
1808 default => 'switch',
e36901c8 1809 break => 'switch',
7d789282 1810 evalbytes=>'evalbytes',
84ed0108 1811 __SUB__ => '__SUB__',
838f2281 1812 fc => 'fc',
80e3f4ad
FC
1813);
1814
3ac5308a
DM
1815# keywords that are strong and also have a prototype
1816#
1817my %strong_proto_keywords = map { $_ => 1 } qw(
3ac5308a
DM
1818 pos
1819 prototype
1820 scalar
1821 study
1822 undef
1823);
1824
4a1ac32e
FC
1825sub keyword {
1826 my $self = shift;
1827 my $name = shift;
1828 return $name if $name =~ /^CORE::/; # just in case
80e3f4ad 1829 if (exists $feature_keywords{$name}) {
223b1722 1830 my $hh;
149758b3
NC
1831 my $hints = $self->{hints} & $feature::hint_mask;
1832 if ($hints && $hints != $feature::hint_mask) {
1873980a 1833 $hh = _features_from_bundle($hints);
223b1722
FC
1834 }
1835 elsif ($hints) { $hh = $self->{'hinthash'} }
7d789282 1836 return "CORE::$name"
223b1722
FC
1837 if !$hh
1838 || !$hh->{"feature_$feature_keywords{$name}"}
80e3f4ad 1839 }
3ac5308a
DM
1840 if ($strong_proto_keywords{$name}
1841 || ($name !~ /^(?:chom?p|do|exec|glob|s(?:elect|ystem))\z/
1842 && !defined eval{prototype "CORE::$name"})
4a1ac32e
FC
1843 ) { return $name }
1844 if (
1845 exists $self->{subs_declared}{$name}
1846 or
1847 exists &{"$self->{curstash}::$name"}
1848 ) {
1849 return "CORE::$name"
1850 }
1851 return $name;
1852}
1853
6e90668e
SM
1854sub baseop {
1855 my $self = shift;
9d2c6865 1856 my($op, $cx, $name) = @_;
4a1ac32e 1857 return $self->keyword($name);
6e90668e
SM
1858}
1859
e99ebc55
RH
1860sub pp_stub {
1861 my $self = shift;
1862 my($op, $cx, $name) = @_;
d989cdac 1863 if ($cx >= 1) {
e99ebc55
RH
1864 return "()";
1865 }
1866 else {
1867 return "();";
1868 }
1869}
6e90668e
SM
1870sub pp_wantarray { baseop(@_, "wantarray") }
1871sub pp_fork { baseop(@_, "fork") }
3ed82cfc
GS
1872sub pp_wait { maybe_targmy(@_, \&baseop, "wait") }
1873sub pp_getppid { maybe_targmy(@_, \&baseop, "getppid") }
1874sub pp_time { maybe_targmy(@_, \&baseop, "time") }
6e90668e
SM
1875sub pp_tms { baseop(@_, "times") }
1876sub pp_ghostent { baseop(@_, "gethostent") }
1877sub pp_gnetent { baseop(@_, "getnetent") }
1878sub pp_gprotoent { baseop(@_, "getprotoent") }
1879sub pp_gservent { baseop(@_, "getservent") }
1880sub pp_ehostent { baseop(@_, "endhostent") }
1881sub pp_enetent { baseop(@_, "endnetent") }
1882sub pp_eprotoent { baseop(@_, "endprotoent") }
1883sub pp_eservent { baseop(@_, "endservent") }
1884sub pp_gpwent { baseop(@_, "getpwent") }
1885sub pp_spwent { baseop(@_, "setpwent") }
1886sub pp_epwent { baseop(@_, "endpwent") }
1887sub pp_ggrent { baseop(@_, "getgrent") }
1888sub pp_sgrent { baseop(@_, "setgrent") }
1889sub pp_egrent { baseop(@_, "endgrent") }
1890sub pp_getlogin { baseop(@_, "getlogin") }
1891
1892sub POSTFIX () { 1 }
1893
9d2c6865
SM
1894# I couldn't think of a good short name, but this is the category of
1895# symbolic unary operators with interesting precedence
1896
1897sub pfixop {
1898 my $self = shift;
1899 my($op, $cx, $name, $prec, $flags) = (@_, 0);
1900 my $kid = $op->first;
1901 $kid = $self->deparse($kid, $prec);
843b15cc
FC
1902 return $self->maybe_parens(($flags & POSTFIX)
1903 ? "$kid$name"
1904 # avoid confusion with filetests
1905 : $name eq '-'
1906 && $kid =~ /^[a-zA-Z](?!\w)/
1907 ? "$name($kid)"
1908 : "$name$kid",
9d2c6865
SM
1909 $cx, $prec);
1910}
1911
1912sub pp_preinc { pfixop(@_, "++", 23) }
1913sub pp_predec { pfixop(@_, "--", 23) }
3ed82cfc
GS
1914sub pp_postinc { maybe_targmy(@_, \&pfixop, "++", 23, POSTFIX) }
1915sub pp_postdec { maybe_targmy(@_, \&pfixop, "--", 23, POSTFIX) }
9d2c6865
SM
1916sub pp_i_preinc { pfixop(@_, "++", 23) }
1917sub pp_i_predec { pfixop(@_, "--", 23) }
3ed82cfc
GS
1918sub pp_i_postinc { maybe_targmy(@_, \&pfixop, "++", 23, POSTFIX) }
1919sub pp_i_postdec { maybe_targmy(@_, \&pfixop, "--", 23, POSTFIX) }
68cc8748 1920sub pp_complement { maybe_targmy(@_, \&pfixop, "~", 21) }
9d2c6865 1921
3ed82cfc
GS
1922sub pp_negate { maybe_targmy(@_, \&real_negate) }
1923sub real_negate {
9d2c6865
SM
1924 my $self = shift;
1925 my($op, $cx) = @_;
3f872cb9 1926 if ($op->first->name =~ /^(i_)?negate$/) {
9d2c6865
SM
1927 # avoid --$x
1928 $self->pfixop($op, $cx, "-", 21.5);
1929 } else {
1930 $self->pfixop($op, $cx, "-", 21);
1931 }
1932}
1933sub pp_i_negate { pp_negate(@_) }
1934
1935sub pp_not {
1936 my $self = shift;
1937 my($op, $cx) = @_;
1938 if ($cx <= 4) {
1cabb3b3 1939 $self->listop($op, $cx, "not", $op->first);
9d2c6865
SM
1940 } else {
1941 $self->pfixop($op, $cx, "!", 21);
1942 }
1943}
1944
6e90668e
SM
1945sub unop {
1946 my $self = shift;
9c56d9ea 1947 my($op, $cx, $name, $nollafr) = @_;
6e90668e 1948 my $kid;
9d2c6865 1949 if ($op->flags & OPf_KIDS) {
aaf643ce 1950 $kid = $op->first;
1c85afce
YO
1951 if (not $name) {
1952 # this deals with 'boolkeys' right now
1953 return $self->deparse($kid,$cx);
1954 }
deb20ba3
RGS
1955 my $builtinname = $name;
1956 $builtinname =~ /^CORE::/ or $builtinname = "CORE::$name";
1957 if (defined prototype($builtinname)
1958 && prototype($builtinname) =~ /^;?\*/
e31885a0
RH
1959 && $kid->name eq "rv2gv") {
1960 $kid = $kid->first;
1961 }
1962
9c56d9ea
FC
1963 if ($nollafr) {
1964 ($kid = $self->deparse($kid, 16)) =~ s/^\cS//;
1965 return $self->maybe_parens(
1966 $self->keyword($name) . " $kid", $cx, 16
1967 );
1968 }
9d2c6865 1969 return $self->maybe_parens_unop($name, $kid, $cx);
6e90668e 1970 } else {
4d8ac5c7
FC
1971 return $self->maybe_parens(
1972 $self->keyword($name) . ($op->flags & OPf_SPECIAL ? "()" : ""),
1973 $cx, 16,
1974 );
6e90668e 1975 }
6e90668e
SM
1976}
1977
3ed82cfc
GS
1978sub pp_chop { maybe_targmy(@_, \&unop, "chop") }
1979sub pp_chomp { maybe_targmy(@_, \&unop, "chomp") }
1980sub pp_schop { maybe_targmy(@_, \&unop, "chop") }
1981sub pp_schomp { maybe_targmy(@_, \&unop, "chomp") }
6e90668e
SM
1982sub pp_defined { unop(@_, "defined") }
1983sub pp_undef { unop(@_, "undef") }
1984sub pp_study { unop(@_, "study") }
6e90668e
SM
1985sub pp_ref { unop(@_, "ref") }
1986sub pp_pos { maybe_local(@_, unop(@_, "pos")) }
1987
3ed82cfc
GS
1988sub pp_sin { maybe_targmy(@_, \&unop, "sin") }
1989sub pp_cos { maybe_targmy(@_, \&unop, "cos") }
1990sub pp_rand { maybe_targmy(@_, \&unop, "rand") }
6e90668e 1991sub pp_srand { unop(@_, "srand") }
3ed82cfc
GS
1992sub pp_exp { maybe_targmy(@_, \&unop, "exp") }
1993sub pp_log { maybe_targmy(@_, \&unop, "log") }
1994sub pp_sqrt { maybe_targmy(@_, \&unop, "sqrt") }
1995sub pp_int { maybe_targmy(@_, \&unop, "int") }
1996sub pp_hex { maybe_targmy(@_, \&unop, "hex") }
1997sub pp_oct { maybe_targmy(@_, \&unop, "oct") }
1998sub pp_abs { maybe_targmy(@_, \&unop, "abs") }
1999
2000sub pp_length { maybe_targmy(@_, \&unop, "length") }
2001sub pp_ord { maybe_targmy(@_, \&unop, "ord") }
2002sub pp_chr { maybe_targmy(@_, \&unop, "chr") }
6e90668e
SM
2003
2004sub pp_each { unop(@_, "each") }
2005sub pp_values { unop(@_, "values") }
2006sub pp_keys { unop(@_, "keys") }
09dcfa7d 2007{ no strict 'refs'; *{"pp_r$_"} = *{"pp_$_"} for qw< keys each values >; }
1c85afce
YO
2008sub pp_boolkeys {
2009 # no name because its an optimisation op that has no keyword
2010 unop(@_,"");
2011}
644741fd
NC
2012sub pp_aeach { unop(@_, "each") }
2013sub pp_avalues { unop(@_, "values") }
2014sub pp_akeys { unop(@_, "keys") }
6e90668e
SM
2015sub pp_pop { unop(@_, "pop") }
2016sub pp_shift { unop(@_, "shift") }
2017
2018sub pp_caller { unop(@_, "caller") }
2019sub pp_reset { unop(@_, "reset") }
2020sub pp_exit { unop(@_, "exit") }
2021sub pp_prototype { unop(@_, "prototype") }
2022
2023sub pp_close { unop(@_, "close") }
2024sub pp_fileno { unop(@_, "fileno") }
2025sub pp_umask { unop(@_, "umask") }
6e90668e
SM
2026sub pp_untie { unop(@_, "untie") }
2027sub pp_tied { unop(@_, "tied") }
2028sub pp_dbmclose { unop(@_, "dbmclose") }
2029sub pp_getc { unop(@_, "getc") }
2030sub pp_eof { unop(@_, "eof") }
2031sub pp_tell { unop(@_, "tell") }
2032sub pp_getsockname { unop(@_, "getsockname") }
2033sub pp_getpeername { unop(@_, "getpeername") }
2034
3ed82cfc
GS
2035sub pp_chdir { maybe_targmy(@_, \&unop, "chdir") }
2036sub pp_chroot { maybe_targmy(@_, \&unop, "chroot") }
6e90668e 2037sub pp_readlink { unop(@_, "readlink") }
3ed82cfc 2038sub pp_rmdir { maybe_targmy(@_, \&unop, "rmdir") }
6e90668e
SM
2039sub pp_readdir { unop(@_, "readdir") }
2040sub pp_telldir { unop(@_, "telldir") }
2041sub pp_rewinddir { unop(@_, "rewinddir") }
2042sub pp_closedir { unop(@_, "closedir") }
3ed82cfc 2043sub pp_getpgrp { maybe_targmy(@_, \&unop, "getpgrp") }
6e90668e
SM
2044sub pp_localtime { unop(@_, "localtime") }
2045sub pp_gmtime { unop(@_, "gmtime") }
2046sub pp_alarm { unop(@_, "alarm") }
3ed82cfc 2047sub pp_sleep { maybe_targmy(@_, \&unop, "sleep") }
6e90668e 2048
94bb57f9 2049sub pp_dofile {
9c56d9ea 2050 my $code = unop(@_, "do", 1); # llafr does not apply
8b46c09b 2051 if ($code =~ s/^((?:CORE::)?do) \{/$1({/) { $code .= ')' }
94bb57f9
FC
2052 $code;
2053}
7d789282
FC
2054sub pp_entereval {
2055 unop(
2056 @_,
2057 $_[1]->private & OPpEVAL_BYTES ? $_[0]->keyword('evalbytes') : "eval"
2058 )
2059}
6e90668e
SM
2060
2061sub pp_ghbyname { unop(@_, "gethostbyname") }
2062sub pp_gnbyname { unop(@_, "getnetbyname") }
2063sub pp_gpbyname { unop(@_, "getprotobyname") }
2064sub pp_shostent { unop(@_, "sethostent") }
2065sub pp_snetent { unop(@_, "setnetent") }
2066sub pp_sprotoent { unop(@_, "setprotoent") }
2067sub pp_sservent { unop(@_, "setservent") }
2068sub pp_gpwnam { unop(@_, "getpwnam") }
2069sub pp_gpwuid { unop(@_, "getpwuid") }
2070sub pp_ggrnam { unop(@_, "getgrnam") }
2071sub pp_ggrgid { unop(@_, "getgrgid") }
2072
2073sub pp_lock { unop(@_, "lock") }
2074
0d863452 2075sub pp_continue { unop(@_, "continue"); }
c08f093b 2076sub pp_break { unop(@_, "break"); }
0d863452
RH
2077
2078sub givwhen {
2079 my $self = shift;
2080 my($op, $cx, $givwhen) = @_;
2081
2082 my $enterop = $op->first;
2083 my ($head, $block);
2084 if ($enterop->flags & OPf_SPECIAL) {
80e3f4ad 2085 $head = $self->keyword("default");
0d863452
RH
2086 $block = $self->deparse($enterop->first, 0);
2087 }
2088 else {
2089 my $cond = $enterop->first;
2090 my $cond_str = $self->deparse($cond, 1);
2091 $head = "$givwhen ($cond_str)";
2092 $block = $self->deparse($cond->sibling, 0);
2093 }
2094
2095 return "$head {\n".
2096 "\t$block\n".
2097 "\b}\cK";
2098}
2099
80e3f4ad
FC
2100sub pp_leavegiven { givwhen(@_, $_[0]->keyword("given")); }
2101sub pp_leavewhen { givwhen(@_, $_[0]->keyword("when")); }
0d863452 2102
6e90668e
SM
2103sub pp_exists {
2104 my $self = shift;
9d2c6865 2105 my($op, $cx) = @_;
34a48b4b
RH
2106 my $arg;
2107 if ($op->private & OPpEXISTS_SUB) {
2108 # Checking for the existence of a subroutine
2109 return $self->maybe_parens_func("exists",
2110 $self->pp_rv2cv($op->first, 16), $cx, 16);
2111 }
2112 if ($op->flags & OPf_SPECIAL) {
2113 # Array element, not hash element
2114 return $self->maybe_parens_func("exists",
2115 $self->pp_aelem($op->first, 16), $cx, 16);
2116 }
9d2c6865
SM
2117 return $self->maybe_parens_func("exists", $self->pp_helem($op->first, 16),
2118 $cx, 16);
6e90668e
SM
2119}
2120
6e90668e
SM
2121sub pp_delete {
2122 my $self = shift;
9d2c6865 2123 my($op, $cx) = @_;
6e90668e
SM
2124 my $arg;
2125 if ($op->private & OPpSLICE) {
34a48b4b
RH
2126 if ($op->flags & OPf_SPECIAL) {
2127 # Deleting from an array, not a hash
2128 return $self->maybe_parens_func("delete",
2129 $self->pp_aslice($op->first, 16),
2130 $cx, 16);
2131 }
9d2c6865
SM
2132 return $self->maybe_parens_func("delete",
2133 $self->pp_hslice($op->first, 16),
2134 $cx, 16);
6e90668e 2135 } else {
34a48b4b
RH
2136 if ($op->flags & OPf_SPECIAL) {
2137 # Deleting from an array, not a hash
2138 return $self->maybe_parens_func("delete",
2139 $self->pp_aelem($op->first, 16),
2140 $cx, 16);
2141 }
9d2c6865
SM
2142 return $self->maybe_parens_func("delete",
2143 $self->pp_helem($op->first, 16),
2144 $cx, 16);
6e90668e 2145 }
6e90668e
SM
2146}
2147
6e90668e
SM
2148sub pp_require {
2149 my $self = shift;
9d2c6865 2150 my($op, $cx) = @_;
d5889722 2151 my $opname = $op->flags & OPf_SPECIAL ? 'CORE::require' : 'require';
3f872cb9 2152 if (class($op) eq "UNOP" and $op->first->name eq "const"
4c1f658f 2153 and $op->first->private & OPpCONST_BARE)
6e90668e 2154 {
18228111 2155 my $name = $self->const_sv($op->first)->PV;
6e90668e
SM
2156 $name =~ s[/][::]g;
2157 $name =~ s/\.pm//g;
41df74e3 2158 return $self->maybe_parens("$opname $name", $cx, 16);
6e90668e 2159 } else {
41df74e3
FC
2160 $self->unop(
2161 $op, $cx,
c75b4828
FC
2162 $op->first->name eq 'const'
2163 && $op->first->private & OPpCONST_NOVER
2164 ? "no"
2165 : $opname,
41df74e3
FC
2166 1, # llafr does not apply
2167 );
6e90668e
SM
2168 }
2169}
2170
d989cdac 2171sub pp_scalar {
9d2c6865 2172 my $self = shift;
d9002312 2173 my($op, $cx) = @_;
9d2c6865
SM
2174 my $kid = $op->first;
2175 if (not null $kid->sibling) {
2176 # XXX Was a here-doc
2177 return $self->dquote($op);
2178 }
2179 $self->unop(@_, "scalar");
2180}
2181
2182
6e90668e
SM
2183sub padval {
2184 my $self = shift;
2185 my $targ = shift;
d989cdac 2186 return $self->{'curcv'}->PADLIST->ARRAYelt(1)->ARRAYelt($targ);
6e90668e
SM
2187}
2188
78c72037
NC
2189sub anon_hash_or_list {
2190 my $self = shift;
d9002312 2191 my($op, $cx) = @_;
78c72037
NC
2192
2193 my($pre, $post) = @{{"anonlist" => ["[","]"],
2194 "anonhash" => ["{","}"]}->{$op->name}};
2195 my($expr, @exprs);
2196 $op = $op->first->sibling; # skip pushmark
2197 for (; !null($op); $op = $op->sibling) {
2198 $expr = $self->deparse($op, 6);
2199 push @exprs, $expr;
2200 }
d9002312
SM
2201 if ($pre eq "{" and $cx < 1) {
2202 # Disambiguate that it's not a block
2203 $pre = "+{";
2204 }
78c72037
NC
2205 return $pre . join(", ", @exprs) . $post;
2206}
2207
2208sub pp_anonlist {
d9002312
SM
2209 my $self = shift;
2210 my ($op, $cx) = @_;
78c72037 2211 if ($op->flags & OPf_SPECIAL) {
d9002312 2212 return $self->anon_hash_or_list($op, $cx);
78c72037
NC
2213 }
2214 warn "Unexpected op pp_" . $op->name() . " without OPf_SPECIAL";
2215 return 'XXX';
2216}
2217
2218*pp_anonhash = \&pp_anonlist;
2219
6e90668e
SM
2220sub pp_refgen {
2221 my $self = shift;
9d2c6865 2222 my($op, $cx) = @_;
6e90668e 2223 my $kid = $op->first;
3f872cb9 2224 if ($kid->name eq "null") {
6e90668e 2225 $kid = $kid->first;
35925e80 2226 if (!null($kid->sibling) and
3f872cb9 2227 $kid->sibling->name eq "anoncode") {
09d856fb 2228 return $self->e_anoncode({ code => $self->padval($kid->sibling->targ) });
3f872cb9
GS
2229 } elsif ($kid->name eq "pushmark") {
2230 my $sib_name = $kid->sibling->name;
2231 if ($sib_name =~ /^(pad|rv2)[ah]v$/
c8c62db7
AD
2232 and not $kid->sibling->flags & OPf_REF)
2233 {
2234 # The @a in \(@a) isn't in ref context, but only when the
2235 # parens are there.
127212b2 2236 return "\\(" . $self->pp_list($op->first) . ")";
3f872cb9 2237 } elsif ($sib_name eq 'entersub') {
c8c62db7
AD
2238 my $text = $self->deparse($kid->sibling, 1);
2239 # Always show parens for \(&func()), but only with -p otherwise
2240 $text = "($text)" if $self->{'parens'}
2241 or $kid->sibling->private & OPpENTERSUB_AMPER;
2242 return "\\$text";
2243 }
2244 }
6e90668e 2245 }
9d2c6865 2246 $self->pfixop($op, $cx, "\\", 20);
6e90668e
SM
2247}
2248
09d856fb
CK
2249sub e_anoncode {
2250 my ($self, $info) = @_;
2251 my $text = $self->deparse_sub($info->{code});
2252 return "sub " . $text;
2253}
2254
6e90668e
SM
2255sub pp_srefgen { pp_refgen(@_) }
2256
2257sub pp_readline {
2258 my $self = shift;
9d2c6865 2259 my($op, $cx) = @_;
6e90668e 2260 my $kid = $op->first;
3f872cb9 2261 $kid = $kid->first if $kid->name eq "rv2gv"; # <$fh>
e31885a0
RH
2262 return "<" . $self->deparse($kid, 1) . ">" if is_scalar($kid);
2263 return $self->unop($op, $cx, "readline");
6e90668e
SM
2264}
2265
ad8caead
RGS
2266sub pp_rcatline {
2267 my $self = shift;
2268 my($op) = @_;
d989cdac 2269 return "<" . $self->gv_name($self->gv_or_padgv($op)) . ">";
ad8caead
RGS
2270}
2271
bd0865ec
GS
2272# Unary operators that can occur as pseudo-listops inside double quotes
2273sub dq_unop {
2274 my $self = shift;
2275 my($op, $cx, $name, $prec, $flags) = (@_, 0, 0);
2276 my $kid;
2277 if ($op->flags & OPf_KIDS) {
2278 $kid = $op->first;
2279 # If there's more than one kid, the first is an ex-pushmark.
2280 $kid = $kid->sibling if not null $kid->sibling;
2281 return $self->maybe_parens_unop($name, $kid, $cx);
2282 } else {
d989cdac 2283 return $name . ($op->flags & OPf_SPECIAL ? "()" : "");
bd0865ec
GS
2284 }
2285}
2286
2287sub pp_ucfirst { dq_unop(@_, "ucfirst") }
2288sub pp_lcfirst { dq_unop(@_, "lcfirst") }
2289sub pp_uc { dq_unop(@_, "uc") }
2290sub pp_lc { dq_unop(@_, "lc") }
3ed82cfc 2291sub pp_quotemeta { maybe_targmy(@_, \&dq_unop, "quotemeta") }
838f2281 2292sub pp_fc { dq_unop(@_, "fc") }
bd0865ec 2293
6e90668e
SM
2294sub loopex {
2295 my $self = shift;
9d2c6865 2296 my ($op, $cx, $name) = @_;
6e90668e 2297 if (class($op) eq "PVOP") {
41df74e3 2298 $name .= " " . $op->pv;
9d2c6865 2299 } elsif (class($op) eq "OP") {
41df74e3 2300 # no-op
6e90668e 2301 } elsif (class($op) eq "UNOP") {
1eb0b7be 2302 (my $kid = $self->deparse($op->first, 7)) =~ s/^\cS//;
41df74e3 2303 $name .= " $kid";
6e90668e 2304 }
1eb0b7be 2305 return $self->maybe_parens($name, $cx, 7);
6e90668e
SM
2306}
2307
2308sub pp_last { loopex(@_, "last") }
2309sub pp_next { loopex(@_, "next") }
2310sub pp_redo { loopex(@_, "redo") }
2311sub pp_goto { loopex(@_, "goto") }
266da325 2312sub pp_dump { loopex(@_, "CORE::dump") }
6e90668e
SM
2313
2314sub ftst {
2315 my $self = shift;
9d2c6865 2316 my($op, $cx, $name) = @_;
6e90668e 2317 if (class($op) eq "UNOP") {
e38ccfd9 2318 # Genuine '-X' filetests are exempt from the LLAFR, but not
5830412d
FC
2319 # l?stat()
2320 if ($name =~ /^-/) {
2321 (my $kid = $self->deparse($op->first, 16)) =~ s/^\cS//;
2322 return $self->maybe_parens("$name $kid", $cx, 16);
2323 }
9d2c6865 2324 return $self->maybe_parens_unop($name, $op->first, $cx);
d989cdac 2325 } elsif (class($op) =~ /^(SV|PAD)OP$/) {
9d2c6865 2326 return $self->maybe_parens_func($name, $self->pp_gv($op, 1), $cx, 16);
6e90668e 2327 } else { # I don't think baseop filetests ever survive ck_ftst, but...
9d2c6865 2328 return $name;
6e90668e 2329 }
6e90668e
SM
2330}
2331
d989cdac
SM
2332sub pp_lstat { ftst(@_, "lstat") }
2333sub pp_stat { ftst(@_, "stat") }
2334sub pp_ftrread { ftst(@_, "-R") }
6e90668e 2335sub pp_ftrwrite { ftst(@_, "-W") }
d989cdac
SM
2336sub pp_ftrexec { ftst(@_, "-X") }
2337sub pp_fteread { ftst(@_, "-r") }
e31885a0 2338sub pp_ftewrite { ftst(@_, "-w") }
d989cdac
SM
2339sub pp_fteexec { ftst(@_, "-x") }
2340sub pp_ftis { ftst(@_, "-e") }
6e90668e
SM
2341sub pp_fteowned { ftst(@_, "-O") }
2342sub pp_ftrowned { ftst(@_, "-o") }
d989cdac
SM
2343sub pp_ftzero { ftst(@_, "-z") }
2344sub pp_ftsize { ftst(@_, "-s") }
2345sub pp_ftmtime { ftst(@_, "-M") }
2346sub pp_ftatime { ftst(@_, "-A") }
2347sub pp_ftctime { ftst(@_, "-C") }
2348sub pp_ftsock { ftst(@_, "-S") }
2349sub pp_ftchr { ftst(@_, "-c") }
2350sub pp_ftblk { ftst(@_, "-b") }
2351sub pp_ftfile { ftst(@_, "-f") }
2352sub pp_ftdir { ftst(@_, "-d") }
2353sub pp_ftpipe { ftst(@_, "-p") }
2354sub pp_ftlink { ftst(@_, "-l") }
2355sub pp_ftsuid { ftst(@_, "-u") }
2356sub pp_ftsgid { ftst(@_, "-g") }
2357sub pp_ftsvtx { ftst(@_, "-k") }
2358sub pp_fttty { ftst(@_, "-t") }
2359sub pp_fttext { ftst(@_, "-T") }
6e90668e
SM
2360sub pp_ftbinary { ftst(@_, "-B") }
2361
a798dbf2 2362sub SWAP_CHILDREN () { 1 }
6e90668e 2363sub ASSIGN () { 2 } # has OP= variant
7013e6ae 2364sub LIST_CONTEXT () { 4 } # Assignment is in list context
6e90668e 2365
9d2c6865
SM
2366my(%left, %right);
2367
2368sub assoc_class {
2369 my $op = shift;
3f872cb9
GS
2370 my $name = $op->name;
2371 if ($name eq "concat" and $op->first->name eq "concat") {
e38ccfd9 2372 # avoid spurious '=' -- see comment in pp_concat
3f872cb9 2373 return "concat";
9d2c6865 2374 }
3f872cb9
GS
2375 if ($name eq "null" and class($op) eq "UNOP"
2376 and $op->first->name =~ /^(and|x?or)$/
9d2c6865
SM
2377 and null $op->first->sibling)
2378 {
2379 # Like all conditional constructs, OP_ANDs and OP_ORs are topped
2380 # with a null that's used as the common end point of the two
2381 # flows of control. For precedence purposes, ignore it.
2382 # (COND_EXPRs have these too, but we don't bother with
2383 # their associativity).
2384 return assoc_class($op->first);
2385 }
2386 return $name . ($op->flags & OPf_STACKED ? "=" : "");
2387}
2388
e38ccfd9 2389# Left associative operators, like '+', for which
9d2c6865
SM
2390# $a + $b + $c is equivalent to ($a + $b) + $c
2391
2392BEGIN {
3f872cb9
GS
2393 %left = ('multiply' => 19, 'i_multiply' => 19,
2394 'divide' => 19, 'i_divide' => 19,
2395 'modulo' => 19, 'i_modulo' => 19,
2396 'repeat' => 19,
2397 'add' => 18, 'i_add' => 18,
2398 'subtract' => 18, 'i_subtract' => 18,
2399 'concat' => 18,
2400 'left_shift' => 17, 'right_shift' => 17,
2401 'bit_and' => 13,
2402 'bit_or' => 12, 'bit_xor' => 12,
2403 'and' => 3,
2404 'or' => 2, 'xor' => 2,
9d2c6865
SM
2405 );
2406}
2407
2408sub deparse_binop_left {
2409 my $self = shift;
2410 my($op, $left, $prec) = @_;
58231d39 2411 if ($left{assoc_class($op)} && $left{assoc_class($left)}
9d2c6865
SM
2412 and $left{assoc_class($op)} == $left{assoc_class($left)})
2413 {
2414 return $self->deparse($left, $prec - .00001);
2415 } else {
2416 return $self->deparse($left, $prec);
2417 }
2418}
2419
e38ccfd9 2420# Right associative operators, like '=', for which
9d2c6865
SM
2421# $a = $b = $c is equivalent to $a = ($b = $c)
2422
2423BEGIN {
3f872cb9
GS
2424 %right = ('pow' => 22,
2425 'sassign=' => 7, 'aassign=' => 7,
2426 'multiply=' => 7, 'i_multiply=' => 7,
2427 'divide=' => 7, 'i_divide=' => 7,
2428 'modulo=' => 7, 'i_modulo=' => 7,
2429 'repeat=' => 7,
2430 'add=' => 7, 'i_add=' => 7,
2431 'subtract=' => 7, 'i_subtract=' => 7,
2432 'concat=' => 7,
2433 'left_shift=' => 7, 'right_shift=' => 7,
2434 'bit_and=' => 7,
2435 'bit_or=' => 7, 'bit_xor=' => 7,
2436 'andassign' => 7,
2437 'orassign' => 7,
9d2c6865
SM
2438 );
2439}
2440
2441sub deparse_binop_right {
2442 my $self = shift;
2443 my($op, $right, $prec) = @_;
58231d39 2444 if ($right{assoc_class($op)} && $right{assoc_class($right)}
9d2c6865
SM
2445 and $right{assoc_class($op)} == $right{assoc_class($right)})
2446 {
2447 return $self->deparse($right, $prec - .00001);
2448 } else {
2449 return $self->deparse($right, $prec);
2450 }
2451}
2452
a798dbf2 2453sub binop {
6e90668e 2454 my $self = shift;
9d2c6865 2455 my ($op, $cx, $opname, $prec, $flags) = (@_, 0);
a798dbf2
MB
2456 my $left = $op->first;
2457 my $right = $op->last;
9d2c6865
SM
2458 my $eq = "";
2459 if ($op->flags & OPf_STACKED && $flags & ASSIGN) {
2460 $eq = "=";
2461 $prec = 7;
2462 }
a798dbf2
MB
2463 if ($flags & SWAP_CHILDREN) {
2464 ($left, $right) = ($right, $left);
2465 }
9d2c6865 2466 $left = $self->deparse_binop_left($op, $left, $prec);
90c0eb26
RH
2467 $left = "($left)" if $flags & LIST_CONTEXT
2468 && $left !~ /^(my|our|local|)[\@\(]/;
9d2c6865
SM
2469 $right = $self->deparse_binop_right($op, $right, $prec);
2470 return $self->maybe_parens("$left $opname$eq $right", $cx, $prec);
2471}
2472
3ed82cfc
GS
2473sub pp_add { maybe_targmy(@_, \&binop, "+", 18, ASSIGN) }
2474sub pp_multiply { maybe_targmy(@_, \&binop, "*", 19, ASSIGN) }
2475sub pp_subtract { maybe_targmy(@_, \&binop, "-",18, ASSIGN) }
2476sub pp_divide { maybe_targmy(@_, \&binop, "/", 19, ASSIGN) }
2477sub pp_modulo { maybe_targmy(@_, \&binop, "%", 19, ASSIGN) }
2478sub pp_i_add { maybe_targmy(@_, \&binop, "+", 18, ASSIGN) }
2479sub pp_i_multiply { maybe_targmy(@_, \&binop, "*", 19, ASSIGN) }
2480sub pp_i_subtract { maybe_targmy(@_, \&binop, "-", 18, ASSIGN) }
2481sub pp_i_divide { maybe_targmy(@_, \&binop, "/", 19, ASSIGN) }
2482sub pp_i_modulo { maybe_targmy(@_, \&binop, "%", 19, ASSIGN) }
2483sub pp_pow { maybe_targmy(@_, \&binop, "**", 22, ASSIGN) }
2484
2485sub pp_left_shift { maybe_targmy(@_, \&binop, "<<", 17, ASSIGN) }
2486sub pp_right_shift { maybe_targmy(@_, \&binop, ">>", 17, ASSIGN) }
2487sub pp_bit_and { maybe_targmy(@_, \&binop, "&", 13, ASSIGN) }
2488sub pp_bit_or { maybe_targmy(@_, \&binop, "|", 12, ASSIGN) }
2489sub pp_bit_xor { maybe_targmy(@_, \&binop, "^", 12, ASSIGN) }
9d2c6865
SM
2490
2491sub pp_eq { binop(@_, "==", 14) }
2492sub pp_ne { binop(@_, "!=", 14) }
2493sub pp_lt { binop(@_, "<", 15) }
2494sub pp_gt { binop(@_, ">", 15) }
2495sub pp_ge { binop(@_, ">=", 15) }
2496sub pp_le { binop(@_, "<=", 15) }
2497sub pp_ncmp { binop(@_, "<=>", 14) }
2498sub pp_i_eq { binop(@_, "==", 14) }
2499sub pp_i_ne { binop(@_, "!=", 14) }
2500sub pp_i_lt { binop(@_, "<", 15) }
2501sub pp_i_gt { binop(@_, ">", 15) }
2502sub pp_i_ge { binop(@_, ">=", 15) }
2503sub pp_i_le { binop(@_, "<=", 15) }
2504sub pp_i_ncmp { binop(@_, "<=>", 14) }
2505
2506sub pp_seq { binop(@_, "eq", 14) }
2507sub pp_sne { binop(@_, "ne", 14) }
2508sub pp_slt { binop(@_, "lt", 15) }
2509sub pp_sgt { binop(@_, "gt", 15) }
2510sub pp_sge { binop(@_, "ge", 15) }
2511sub pp_sle { binop(@_, "le", 15) }
2512sub pp_scmp { binop(@_, "cmp", 14) }
2513
2514sub pp_sassign { binop(@_, "=", 7, SWAP_CHILDREN) }
7013e6ae 2515sub pp_aassign { binop(@_, "=", 7, SWAP_CHILDREN | LIST_CONTEXT) }
6e90668e 2516
0d863452
RH
2517sub pp_smartmatch {
2518 my ($self, $op, $cx) = @_;
2519 if ($op->flags & OPf_SPECIAL) {
9210de83 2520 return $self->deparse($op->last, $cx);
0d863452
RH
2521 }
2522 else {
2523 binop(@_, "~~", 14);
2524 }
2525}
2526
e38ccfd9 2527# '.' is special because concats-of-concats are optimized to save copying
6e90668e 2528# by making all but the first concat stacked. The effect is as if the
e38ccfd9 2529# programmer had written '($a . $b) .= $c', except legal.
3ed82cfc
GS
2530sub pp_concat { maybe_targmy(@_, \&real_concat) }
2531sub real_concat {
6e90668e 2532 my $self = shift;
9d2c6865 2533 my($op, $cx) = @_;
6e90668e
SM
2534 my $left = $op->first;
2535 my $right = $op->last;
2536 my $eq = "";
9d2c6865 2537 my $prec = 18;
3f872cb9 2538 if ($op->flags & OPf_STACKED and $op->first->name ne "concat") {
6e90668e 2539 $eq = "=";
9d2c6865 2540 $prec = 7;
6e90668e 2541 }
9d2c6865
SM
2542 $left = $self->deparse_binop_left($op, $left, $prec);
2543 $right = $self->deparse_binop_right($op, $right, $prec);
2544 return $self->maybe_parens("$left .$eq $right", $cx, $prec);
6e90668e
SM
2545}
2546
e38ccfd9 2547# 'x' is weird when the left arg is a list
6e90668e
SM
2548sub pp_repeat {
2549 my $self = shift;
9d2c6865 2550 my($op, $cx) = @_;
6e90668e
SM
2551 my $left = $op->first;
2552 my $right = $op->last;
9d2c6865
SM
2553 my $eq = "";
2554 my $prec = 19;
2555 if ($op->flags & OPf_STACKED) {
2556 $eq = "=";
2557 $prec = 7;
2558 }
6e90668e
SM
2559 if (null($right)) { # list repeat; count is inside left-side ex-list
2560 my $kid = $left->first->sibling; # skip pushmark
2561 my @exprs;
2562 for (; !null($kid->sibling); $kid = $kid->sibling) {
9d2c6865 2563 push @exprs, $self->deparse($kid, 6);
6e90668e
SM
2564 }
2565 $right = $kid;
2566 $left = "(" . join(", ", @exprs). ")";
2567 } else {
9d2c6865 2568 $left = $self->deparse_binop_left($op, $left, $prec);
6e90668e 2569 }
9d2c6865
SM
2570 $right = $self->deparse_binop_right($op, $right, $prec);
2571 return $self->maybe_parens("$left x$eq $right", $cx, $prec);
6e90668e
SM
2572}
2573
2574sub range {
2575 my $self = shift;
9d2c6865 2576 my ($op, $cx, $type) = @_;
6e90668e
SM
2577 my $left = $op->first;
2578 my $right = $left->sibling;
9d2c6865
SM
2579 $left = $self->deparse($left, 9);
2580 $right = $self->deparse($right, 9);
2581 return $self->maybe_parens("$left $type $right", $cx, 9);
6e90668e
SM
2582}
2583
2584sub pp_flop {
2585 my $self = shift;
9d2c6865 2586 my($op, $cx) = @_;
6e90668e
SM
2587 my $flip = $op->first;
2588 my $type = ($flip->flags & OPf_SPECIAL) ? "..." : "..";
9d2c6865 2589 return $self->range($flip->first, $cx, $type);
6e90668e
SM
2590}
2591
2592# one-line while/until is handled in pp_leave
2593
2594sub logop {
2595 my $self = shift;
9d2c6865 2596 my ($op, $cx, $lowop, $lowprec, $highop, $highprec, $blockname) = @_;
6e90668e
SM
2597 my $left = $op->first;
2598 my $right = $op->first->sibling;
d989cdac 2599 if ($cx < 1 and is_scope($right) and $blockname
58cccf98
SM
2600 and $self->{'expand'} < 7)
2601 { # if ($a) {$b}
9d2c6865
SM
2602 $left = $self->deparse($left, 1);
2603 $right = $self->deparse($right, 0);
2604 return "$blockname ($left) {\n\t$right\n\b}\cK";
d989cdac 2605 } elsif ($cx < 1 and $blockname and not $self->{'parens'}
58cccf98 2606 and $self->{'expand'} < 7) { # $b if $a
9d2c6865
SM
2607 $right = $self->deparse($right, 1);
2608 $left = $self->deparse($left, 1);
2609 return "$right $blockname $left";
2610 } elsif ($cx > $lowprec and $highop) { # $a && $b
2611 $left = $self->deparse_binop_left($op, $left, $highprec);
2612 $right = $self->deparse_binop_right($op, $right, $highprec);
2613 return $self->maybe_parens("$left $highop $right", $cx, $highprec);
2614 } else { # $a and $b
2615 $left = $self->deparse_binop_left($op, $left, $lowprec);
2616 $right = $self->deparse_binop_right($op, $right, $lowprec);
d989cdac 2617 return $self->maybe_parens("$left $lowop $right", $cx, $lowprec);
9d2c6865
SM
2618 }
2619}
2620
2621sub pp_and { logop(@_, "and", 3, "&&", 11, "if") }
f4a44678 2622sub pp_or { logop(@_, "or", 2, "||", 10, "unless") }
5b99f273 2623sub pp_dor { logop(@_, "//", 10) }
3ed82cfc
GS
2624
2625# xor is syntactically a logop, but it's really a binop (contrary to
2626# old versions of opcode.pl). Syntax is what matters here.
9d2c6865 2627sub pp_xor { logop(@_, "xor", 2, "", 0, "") }
6e90668e
SM
2628
2629sub logassignop {
2630 my $self = shift;
9d2c6865 2631 my ($op, $cx, $opname) = @_;
6e90668e
SM
2632 my $left = $op->first;
2633 my $right = $op->first->sibling->first; # skip sassign
9d2c6865
SM
2634 $left = $self->deparse($left, 7);
2635 $right = $self->deparse($right, 7);
2636 return $self->maybe_parens("$left $opname $right", $cx, 7);
a798dbf2
MB
2637}
2638
6e90668e 2639sub pp_andassign { logassignop(@_, "&&=") }
c963b151
BD
2640sub pp_orassign { logassignop(@_, "||=") }
2641sub pp_dorassign { logassignop(@_, "//=") }
6e90668e 2642
b89b7257
FC
2643sub rv2gv_or_string {
2644 my($self,$op) = @_;
2645 if ($op->name eq "gv") { # could be open("open") or open("###")
be6cf5cf 2646 my($name,$quoted) =
1db94eeb 2647 $self->stash_variable_name("", $self->gv_or_padgv($op));
be6cf5cf 2648 $quoted ? $name : "*$name";
b89b7257
FC
2649 }
2650 else {
2651 $self->deparse($op, 6);
2652 }
2653}
2654
6e90668e
SM
2655sub listop {
2656 my $self = shift;
9c56d9ea 2657 my($op, $cx, $name, $kid, $nollafr) = @_;
9d2c6865
SM
2658 my(@exprs);
2659 my $parens = ($cx >= 5) || $self->{'parens'};
24fcb59f 2660 $kid ||= $op->first->sibling;
4d8ac5c7
FC
2661 # If there are no arguments, add final parentheses (or parenthesize the
2662 # whole thing if the llafr does not apply) to account for cases like
2663 # (return)+1 or setpgrp()+1. When the llafr does not apply, we use a
2664 # precedence of 6 (< comma), as "return, 1" does not need parentheses.
2665 if (null $kid) {
2666 return $nollafr
2667 ? $self->maybe_parens($self->keyword($name), $cx, 7)
2668 : $self->keyword($name) . '()' x (7 < $cx);
2669 }
e31885a0 2670 my $first;
4a1ac32e 2671 my $fullname = $self->keyword($name);
b72c97e8 2672 my $proto = prototype("CORE::$name");
bc1cc2c3
DM
2673 if (
2674 ( (defined $proto && $proto =~ /^;?\*/)
2675 || $name eq 'select' # select(F) doesn't have a proto
2676 )
2677 && $kid->name eq "rv2gv"
2678 && !($kid->private & OPpLVAL_INTRO)
2679 ) {
b89b7257 2680 $first = $self->rv2gv_or_string($kid->first);
e31885a0
RH
2681 }
2682 else {
2683 $first = $self->deparse($kid, 6);
2684 }
e99ebc55 2685 if ($name eq "chmod" && $first =~ /^\d+$/) {
a0035eb8 2686 $first = sprintf("%#o", $first);
e99ebc55 2687 }
9c56d9ea
FC
2688 $first = "+$first"
2689 if not $parens and not $nollafr and substr($first, 0, 1) eq "(";
9d2c6865
SM
2690 push @exprs, $first;
2691 $kid = $kid->sibling;
564cd6cb
FC
2692 if (defined $proto && $proto =~ /^\*\*/ && $kid->name eq "rv2gv"
2693 && !($kid->private & OPpLVAL_INTRO)) {
b89b7257 2694 push @exprs, $first = $self->rv2gv_or_string($kid->first);
b72c97e8
RGS
2695 $kid = $kid->sibling;
2696 }
9d2c6865
SM
2697 for (; !null($kid); $kid = $kid->sibling) {
2698 push @exprs, $self->deparse($kid, 6);
2699 }
689e417f 2700 if ($name eq "reverse" && ($op->private & OPpREVERSE_INPLACE)) {
4a1ac32e
FC
2701 return "$exprs[0] = $fullname"
2702 . ($parens ? "($exprs[0])" : " $exprs[0]");
689e417f 2703 }
327088eb
DM
2704 if ($name =~ /^(system|exec)$/
2705 && ($op->flags & OPf_STACKED)
2706 && @exprs > 1)
2707 {
2708 # handle the "system prog a1,a2,.." form
2709 my $prog = shift @exprs;
2710 $exprs[0] = "$prog $exprs[0]";
2711 }
2712
9c56d9ea
FC
2713 if ($parens && $nollafr) {
2714 return "($fullname " . join(", ", @exprs) . ")";
2715 } elsif ($parens) {
4a1ac32e 2716 return "$fullname(" . join(", ", @exprs) . ")";
9d2c6865 2717 } else {
4a1ac32e 2718 return "$fullname " . join(", ", @exprs);
6e90668e 2719 }
6e90668e 2720}
a798dbf2 2721
6e90668e 2722sub pp_bless { listop(@_, "bless") }
3ed82cfc 2723sub pp_atan2 { maybe_targmy(@_, \&listop, "atan2") }
24fcb59f
FC
2724sub pp_substr {
2725 my ($self,$op,$cx) = @_;
2726 if ($op->private & OPpSUBSTR_REPL_FIRST) {
2727 return
2728 listop($self, $op, 7, "substr", $op->first->sibling->sibling)
2729 . " = "
2730 . $self->deparse($op->first->sibling, 7);
2731 }
2732 maybe_local(@_, listop(@_, "substr"))
2733}
6e90668e 2734sub pp_vec { maybe_local(@_, listop(@_, "vec")) }
3ed82cfc
GS
2735sub pp_index { maybe_targmy(@_, \&listop, "index") }
2736sub pp_rindex { maybe_targmy(@_, \&listop, "rindex") }
2737sub pp_sprintf { maybe_targmy(@_, \&listop, "sprintf") }
6e90668e 2738sub pp_formline { listop(@_, "formline") } # see also deparse_format
3ed82cfc 2739sub pp_crypt { maybe_targmy(@_, \&listop, "crypt") }
6e90668e
SM
2740sub pp_unpack { listop(@_, "unpack") }
2741sub pp_pack { listop(@_, "pack") }
3ed82cfc 2742sub pp_join { maybe_targmy(@_, \&listop, "join") }
6e90668e 2743sub pp_splice { listop(@_, "splice") }
3ed82cfc
GS
2744sub pp_push { maybe_targmy(@_, \&listop, "push") }
2745sub pp_unshift { maybe_targmy(@_, \&listop, "unshift") }
6e90668e
SM
2746sub pp_reverse { listop(@_, "reverse") }
2747sub pp_warn { listop(@_, "warn") }
2748sub pp_die { listop(@_, "die") }
9c56d9ea 2749sub pp_return { listop(@_, "return", undef, 1) } # llafr does not apply
6e90668e
SM
2750sub pp_open { listop(@_, "open") }
2751sub pp_pipe_op { listop(@_, "pipe") }
2752sub pp_tie { listop(@_, "tie") }
82bafd27 2753sub pp_binmode { listop(@_, "binmode") }
6e90668e
SM
2754sub pp_dbmopen { listop(@_, "dbmopen") }
2755sub pp_sselect { listop(@_, "select") }
2756sub pp_select { listop(@_, "select") }
2757sub pp_read { listop(@_, "read") }
2758sub pp_sysopen { listop(@_, "sysopen") }
2759sub pp_sysseek { listop(@_, "sysseek") }
2760sub pp_sysread { listop(@_, "sysread") }
2761sub pp_syswrite { listop(@_, "syswrite") }
2762sub pp_send { listop(@_, "send") }
2763sub pp_recv { listop(@_, "recv") }
2764sub pp_seek { listop(@_, "seek") }
6e90668e
SM
2765sub pp_fcntl { listop(@_, "fcntl") }
2766sub pp_ioctl { listop(@_, "ioctl") }
3ed82cfc 2767sub pp_flock { maybe_targmy(@_, \&listop, "flock") }
6e90668e 2768sub pp_socket { listop(@_, "socket") }
5deb1341 2769sub pp_sockpair { listop(@_, "socketpair") }
6e90668e
SM
2770sub pp_bind { listop(@_, "bind") }
2771sub pp_connect { listop(@_, "connect") }
2772sub pp_listen { listop(@_, "listen") }
2773sub pp_accept { listop(@_, "accept") }
2774sub pp_shutdown { listop(@_, "shutdown") }
2775sub pp_gsockopt { listop(@_, "getsockopt") }
2776sub pp_ssockopt { listop(@_, "setsockopt") }
3ed82cfc
GS
2777sub pp_chown { maybe_targmy(@_, \&listop, "chown") }
2778sub pp_unlink { maybe_targmy(@_, \&listop, "unlink") }
2779sub pp_chmod { maybe_targmy(@_, \&listop, "chmod") }
2780sub pp_utime { maybe_targmy(@_, \&listop, "utime") }
2781sub pp_rename { maybe_targmy(@_, \&listop, "rename") }
2782sub pp_link { maybe_targmy(@_, \&listop, "link") }
2783sub pp_symlink { maybe_targmy(@_, \&listop, "symlink") }
2784sub pp_mkdir { maybe_targmy(@_, \&listop, "mkdir") }
6e90668e
SM
2785sub pp_open_dir { listop(@_, "opendir") }
2786sub pp_seekdir { listop(@_, "seekdir") }
3ed82cfc
GS
2787sub pp_waitpid { maybe_targmy(@_, \&listop, "waitpid") }
2788sub pp_system { maybe_targmy(@_, \&listop, "system") }
2789sub pp_exec { maybe_targmy(@_, \&listop, "exec") }
2790sub pp_kill { maybe_targmy(@_, \&listop, "kill") }
2791sub pp_setpgrp { maybe_targmy(@_, \&listop, "setpgrp") }
2792sub pp_getpriority { maybe_targmy(@_, \&listop, "getpriority") }
2793sub pp_setpriority { maybe_targmy(@_, \&listop, "setpriority") }
6e90668e
SM
2794sub pp_shmget { listop(@_, "shmget") }
2795sub pp_shmctl { listop(@_, "shmctl") }
2796sub pp_shmread { listop(@_, "shmread") }
2797sub pp_shmwrite { listop(@_, "shmwrite") }
2798sub pp_msgget { listop(@_, "msgget") }
2799sub pp_msgctl { listop(@_, "msgctl") }
2800sub pp_msgsnd { listop(@_, "msgsnd") }
2801sub pp_msgrcv { listop(@_, "msgrcv") }
2802sub pp_semget { listop(@_, "semget") }
2803sub pp_semctl { listop(@_, "semctl") }
2804sub pp_semop { listop(@_, "semop") }
2805sub pp_ghbyaddr { listop(@_, "gethostbyaddr") }
2806sub pp_gnbyaddr { listop(@_, "getnetbyaddr") }
2807sub pp_gpbynumber { listop(@_, "getprotobynumber") }
2808sub pp_gsbyname { listop(@_, "getservbyname") }
2809sub pp_gsbyport { listop(@_, "getservbyport") }
2810sub pp_syscall { listop(@_, "syscall") }
2811
2812sub pp_glob {
2813 my $self = shift;
9d2c6865 2814 my($op, $cx) = @_;
93860275 2815 my $kid = $op->first->sibling; # skip pushmark
a32fbbd8
FC
2816 my $keyword =
2817 $op->flags & OPf_SPECIAL ? 'glob' : $self->keyword('glob');
93860275
FC
2818 my $text;
2819 if ($keyword =~ /^CORE::/
2820 or $kid->name ne 'const'
2821 or ($text = $self->dq($kid))
2822 =~ /^\$?(\w|::|\`)+$/ # could look like a readline
a32fbbd8 2823 or $text =~ /[<>]/) {
93860275
FC
2824 $text = $self->deparse($kid);
2825 return $cx >= 5 || $self->{'parens'}
2826 ? "$keyword($text)"
2827 : "$keyword $text";
6e90668e
SM
2828 } else {
2829 return '<' . $text . '>';
2830 }
2831}
2832
f5aa8f4e
SM
2833# Truncate is special because OPf_SPECIAL makes a bareword first arg
2834# be a filehandle. This could probably be better fixed in the core
2835# by moving the GV lookup into ck_truc.
2836
2837sub pp_truncate {
2838 my $self = shift;
2839 my($op, $cx) = @_;
2840 my(@exprs);
2841 my $parens = ($cx >= 5) || $self->{'parens'};
2842 my $kid = $op->first->sibling;
acba1d67 2843 my $fh;
f5aa8f4e
SM
2844 if ($op->flags & OPf_SPECIAL) {
2845 # $kid is an OP_CONST
18228111 2846 $fh = $self->const_sv($kid)->PV;
f5aa8f4e
SM
2847 } else {
2848 $fh = $self->deparse($kid, 6);
2849 $fh = "+$fh" if not $parens and substr($fh, 0, 1) eq "(";
2850 }
2851 my $len = $self->deparse($kid->sibling, 6);
4a1ac32e 2852 my $name = $self->keyword('truncate');
f5aa8f4e 2853 if ($parens) {
4a1ac32e 2854 return "$name($fh, $len)";
f5aa8f4e 2855 } else {
4a1ac32e 2856 return "$name $fh, $len";
f5aa8f4e 2857 }
f5aa8f4e
SM
2858}
2859
6e90668e
SM
2860sub indirop {
2861 my $self = shift;
9d2c6865 2862 my($op, $cx, $name) = @_;
6e90668e 2863 my($expr, @exprs);
521795fe 2864 my $firstkid = my $kid = $op->first->sibling;
6e90668e
SM
2865 my $indir = "";
2866 if ($op->flags & OPf_STACKED) {
2867 $indir = $kid;
2868 $indir = $indir->first; # skip rv2gv
2869 if (is_scope($indir)) {
9d2c6865 2870 $indir = "{" . $self->deparse($indir, 0) . "}";
d989cdac 2871 $indir = "{;}" if $indir eq "{}";
c73811ab
RH
2872 } elsif ($indir->name eq "const" && $indir->private & OPpCONST_BARE) {
2873 $indir = $self->const_sv($indir)->PV;
6e90668e 2874 } else {
9d2c6865 2875 $indir = $self->deparse($indir, 24);
6e90668e
SM
2876 }
2877 $indir = $indir . " ";
2878 $kid = $kid->sibling;
2879 }
7e80da18 2880 if ($name eq "sort" && $op->private & (OPpSORT_NUMERIC | OPpSORT_INTEGER)) {
3ac6e0f9 2881 $indir = ($op->private & OPpSORT_DESCEND) ? '{$b <=> $a} '
7e80da18
RH
2882 : '{$a <=> $b} ';
2883 }
3ac6e0f9 2884 elsif ($name eq "sort" && $op->private & OPpSORT_DESCEND) {
7e80da18
RH
2885 $indir = '{$b cmp $a} ';
2886 }
6e90668e 2887 for (; !null($kid); $kid = $kid->sibling) {
521795fe 2888 $expr = $self->deparse($kid, !$indir && $kid == $firstkid && $name eq "sort" && $firstkid->name eq "entersub" ? 16 : 6);
6e90668e
SM
2889 push @exprs, $expr;
2890 }
4a1ac32e 2891 my $name2;
3ac6e0f9 2892 if ($name eq "sort" && $op->private & OPpSORT_REVERSE) {
4a1ac32e 2893 $name2 = $self->keyword('reverse') . ' ' . $self->keyword('sort');
3ac6e0f9 2894 }
4a1ac32e 2895 else { $name2 = $self->keyword($name) }
2b6e98cb 2896 if ($name eq "sort" && ($op->private & OPpSORT_INPLACE)) {
3ac6e0f9 2897 return "$exprs[0] = $name2 $indir $exprs[0]";
2b6e98cb
DM
2898 }
2899
d989cdac 2900 my $args = $indir . join(", ", @exprs);
521795fe 2901 if ($indir ne "" && $name eq "sort") {
d989cdac
SM
2902 # We don't want to say "sort(f 1, 2, 3)", since perl -w will
2903 # give bareword warnings in that case. Therefore if context
2904 # requires, we'll put parens around the outside "(sort f 1, 2,
2905 # 3)". Unfortunately, we'll currently think the parens are
3c4b39be 2906 # necessary more often that they really are, because we don't
d989cdac
SM
2907 # distinguish which side of an assignment we're on.
2908 if ($cx >= 5) {
3ac6e0f9 2909 return "($name2 $args)";
d989cdac 2910 } else {
3ac6e0f9 2911 return "$name2 $args";
d989cdac 2912 }
521795fe
FC
2913 } elsif (
2914 !$indir && $name eq "sort"
ca331985 2915 && !null($op->first->sibling)
521795fe
FC
2916 && $op->first->sibling->name eq 'entersub'
2917 ) {
2918 # We cannot say sort foo(bar), as foo will be interpreted as a
2919 # comparison routine. We have to say sort(...) in that case.
2920 return "$name2($args)";
d989cdac 2921 } else {
3ac6e0f9 2922 return $self->maybe_parens_func($name2, $args, $cx, 5);
d989cdac
SM
2923 }
2924
6e90668e
SM
2925}
2926
2927sub pp_prtf { indirop(@_, "printf") }
2928sub pp_print { indirop(@_, "print") }
9b08e3d3 2929sub pp_say { indirop(@_, "say") }
6e90668e
SM
2930sub pp_sort { indirop(@_, "sort") }
2931
2932sub mapop {
2933 my $self = shift;
9d2c6865 2934 my($op, $cx, $name) = @_;
6e90668e
SM
2935 my($expr, @exprs);
2936 my $kid = $op->first; # this is the (map|grep)start
2937 $kid = $kid->first->sibling; # skip a pushmark
2938 my $code = $kid->first; # skip a null
2939 if (is_scope $code) {
f4a44678 2940 $code = "{" . $self->deparse($code, 0) . "} ";
6e90668e 2941 } else {
6d08f7b3
DM
2942 $code = $self->deparse($code, 24);
2943 $code .= ", " if !null($kid->sibling);
6e90668e
SM
2944 }
2945 $kid = $kid->sibling;
2946 for (; !null($kid); $kid = $kid->sibling) {
9d2c6865 2947 $expr = $self->deparse($kid, 6);
9a58b761 2948 push @exprs, $expr if defined $expr;
6e90668e 2949 }
9d2c6865 2950 return $self->maybe_parens_func($name, $code . join(", ", @exprs), $cx, 5);
6e90668e
SM
2951}
2952
d989cdac
SM
2953sub pp_mapwhile { mapop(@_, "map") }
2954sub pp_grepwhile { mapop(@_, "grep") }
11e09183
SP
2955sub pp_mapstart { baseop(@_, "map") }
2956sub pp_grepstart { baseop(@_, "grep") }
6e90668e
SM
2957
2958sub pp_list {
2959 my $self = shift;
9d2c6865 2960 my($op, $cx) = @_;
6e90668e
SM
2961 my($expr, @exprs);
2962 my $kid = $op->first->sibling; # skip pushmark
958ed56b 2963 return '' if class($kid) eq 'NULL';
6e90668e 2964 my $lop;
3462b4ac 2965 my $local = "either"; # could be local(...), my(...), state(...) or our(...)
6e90668e
SM
2966 for ($lop = $kid; !null($lop); $lop = $lop->sibling) {
2967 # This assumes that no other private flags equal 128, and that
2968 # OPs that store things other than flags in their op_private,
2969 # like OP_AELEMFAST, won't be immediate children of a list.
b8e103fc 2970 #
60041a09 2971 # OP_ENTERSUB and OP_SPLIT can break this logic, so check for them.
b8e103fc 2972 # I suspect that open and exit can too.
60041a09
FC
2973 # XXX This really needs to be rewritten to accept only those ops
2974 # known to take the OPpLVAL_INTRO flag.
b8e103fc
RH
2975
2976 if (!($lop->private & (OPpLVAL_INTRO|OPpOUR_INTRO)
ce4e655d 2977 or $lop->name eq "undef")
60041a09 2978 or $lop->name =~ /^(?:entersub|exit|open|split)\z/)
6e90668e
SM
2979 {
2980 $local = ""; # or not
2981 last;
2982 }
3462b4ac
RGS
2983 if ($lop->name =~ /^pad[ash]v$/) {
2984 if ($lop->private & OPpPAD_STATE) { # state()
2985 ($local = "", last) if $local =~ /^(?:local|our|my)$/;
2986 $local = "state";
2987 } else { # my()
2988 ($local = "", last) if $local =~ /^(?:local|our|state)$/;
2989 $local = "my";
2990 }
b8e103fc
RH
2991 } elsif ($lop->name =~ /^(gv|rv2)[ash]v$/
2992 && $lop->private & OPpOUR_INTRO
2993 or $lop->name eq "null" && $lop->first->name eq "gvsv"
2994 && $lop->first->private & OPpOUR_INTRO) { # our()
3462b4ac 2995 ($local = "", last) if $local =~ /^(?:my|local|state)$/;
ce4e655d 2996 $local = "our";
3ac6e0f9
RGS
2997 } elsif ($lop->name ne "undef"
2998 # specifically avoid the "reverse sort" optimisation,
2999 # where "reverse" is nullified
36d57d93 3000 && !($lop->name eq 'sort' && ($lop->flags & OPpSORT_REVERSE)))
3ac6e0f9
RGS
3001 {
3002 # local()
3462b4ac 3003 ($local = "", last) if $local =~ /^(?:my|our|state)$/;
6e90668e
SM
3004 $local = "local";
3005 }
3006 }
3007 $local = "" if $local eq "either"; # no point if it's all undefs
f5aa8f4e 3008 return $self->deparse($kid, $cx) if null $kid->sibling and not $local;
6e90668e
SM
3009 for (; !null($kid); $kid = $kid->sibling) {
3010 if ($local) {
3f872cb9 3011 if (class($kid) eq "UNOP" and $kid->first->name eq "gvsv") {
6e90668e
SM
3012 $lop = $kid->first;
3013 } else {
3014 $lop = $kid;
3015 }
3016 $self->{'avoid_local'}{$$lop}++;
9d2c6865 3017 $expr = $self->deparse($kid, 6);
6e90668e
SM
3018 delete $self->{'avoid_local'}{$$lop};
3019 } else {
9d2c6865 3020 $expr = $self->deparse($kid, 6);
6e90668e
SM
3021 }
3022 push @exprs, $expr;
3023 }
9d2c6865
SM
3024 if ($local) {
3025 return "$local(" . join(", ", @exprs) . ")";
3026 } else {
3027 return $self->maybe_parens( join(", ", @exprs), $cx, 6);
3028 }
6e90668e
SM
3029}
3030
6f611a1a
GS
3031sub is_ifelse_cont {
3032 my $op = shift;
3033 return ($op->name eq "null" and class($op) eq "UNOP"
3034 and $op->first->name =~ /^(and|cond_expr)$/
3035 and is_scope($op->first->first->sibling));
3036}
3037
6e90668e
SM
3038sub pp_cond_expr {
3039 my $self = shift;
9d2c6865 3040 my($op, $cx) = @_;
6e90668e
SM
3041 my $cond = $op->first;
3042 my $true = $cond->sibling;
3043 my $false = $true->sibling;
9d2c6865 3044 my $cuddle = $self->{'cuddle'};
d989cdac 3045 unless ($cx < 1 and (is_scope($true) and $true->name ne "null") and
58cccf98
SM
3046 (is_scope($false) || is_ifelse_cont($false))
3047 and $self->{'expand'} < 7) {
f5aa8f4e 3048 $cond = $self->deparse($cond, 8);
cfaba469 3049 $true = $self->deparse($true, 6);
9d2c6865
SM
3050 $false = $self->deparse($false, 8);
3051 return $self->maybe_parens("$cond ? $true : $false", $cx, 8);
6f611a1a
GS
3052 }
3053
f5aa8f4e 3054 $cond = $self->deparse($cond, 1);
d989cdac 3055 $true = $self->deparse($true, 0);
6f611a1a
GS
3056 my $head = "if ($cond) {\n\t$true\n\b}";
3057 my @elsifs;
3058 while (!null($false) and is_ifelse_cont($false)) {
3059 my $newop = $false->first;
3060 my $newcond = $newop->first;
3061 my $newtrue = $newcond->sibling;
3062 $false = $newtrue->sibling; # last in chain is OP_AND => no else
7ecdd211
PJ
3063 if ($newcond->name eq "lineseq")
3064 {
3065 # lineseq to ensure correct line numbers in elsif()
3066 # Bug #37302 fixed by change #33710.
3067 $newcond = $newcond->first->sibling;
3068 }
6f611a1a
GS
3069 $newcond = $self->deparse($newcond, 1);
3070 $newtrue = $self->deparse($newtrue, 0);
3071 push @elsifs, "elsif ($newcond) {\n\t$newtrue\n\b}";
3072 }
d989cdac 3073 if (!null($false)) {
6f611a1a
GS
3074 $false = $cuddle . "else {\n\t" .
3075 $self->deparse($false, 0) . "\n\b}\cK";
3076 } else {
3077 $false = "\cK";
6e90668e 3078 }
d989cdac 3079 return $head . join($cuddle, "", @elsifs) . $false;
6e90668e
SM
3080}
3081
95562366
NC
3082sub pp_once {
3083 my ($self, $op, $cx) = @_;
3084 my $cond = $op->first;
3085 my $true = $cond->sibling;
3086
3087 return $self->deparse($true, $cx);
3088}
3089
58cccf98 3090sub loop_common {
6e90668e 3091 my $self = shift;
58cccf98 3092 my($op, $cx, $init) = @_;
6e90668e
SM
3093 my $enter = $op->first;
3094 my $kid = $enter->sibling;
0ced6c29
RGS
3095 local(@$self{qw'curstash warnings hints hinthash'})
3096 = @$self{qw'curstash warnings hints hinthash'};
6e90668e 3097 my $head = "";
9d2c6865 3098 my $bare = 0;
58cccf98
SM
3099 my $body;
3100 my $cond = undef;
d989cdac 3101 if ($kid->name eq "lineseq") { # bare or infinite loop
241416b8 3102 if ($kid->last->name eq "unstack") { # infinite
e99ebc55 3103 $head = "while (1) "; # Can't use for(;;) if there's a continue
58cccf98 3104 $cond = "";
9d2c6865
SM
3105 } else {
3106 $bare = 1;
6e90668e 3107 }
58cccf98 3108 $body = $kid;
3f872cb9 3109 } elsif ($enter->name eq "enteriter") { # foreach
6e90668e
SM
3110 my $ary = $enter->first->sibling; # first was pushmark
3111 my $var = $ary->sibling;
36d57d93
RGS
3112 if ($ary->name eq 'null' and $enter->private & OPpITER_REVERSED) {
3113 # "reverse" was optimised away
aae53c41 3114 $ary = listop($self, $ary->first->sibling, 1, 'reverse');
36d57d93 3115 } elsif ($enter->flags & OPf_STACKED
f5aa8f4e
SM
3116 and not null $ary->first->sibling->sibling)
3117 {
d7f5b6da
SM
3118 $ary = $self->deparse($ary->first->sibling, 9) . " .. " .
3119 $self->deparse($ary->first->sibling->sibling, 9);
d8d95777
GA
3120 } else {
3121 $ary = $self->deparse($ary, 1);
3122 }
6e90668e 3123 if (null $var) {
823eff14
NC
3124 if (($enter->flags & OPf_SPECIAL) && ($] < 5.009)) {
3125 # thread special var, under 5005threads
9d2c6865 3126 $var = $self->pp_threadsv($enter, 1);
f6f9bdb7 3127 } else { # regular my() variable
4da9a2ca 3128 $var = $self->pp_padsv($enter, 1, 1);
6e90668e 3129 }
3f872cb9 3130 } elsif ($var->name eq "rv2gv") {
9d2c6865 3131 $var = $self->pp_rv2sv($var, 1);
241416b8
DM
3132 if ($enter->private & OPpOUR_INTRO) {
3133 # our declarations don't have package names
3134 $var =~ s/^(.).*::/$1/;
3135 $var = "our $var";
3136 }
3f872cb9 3137 } elsif ($var->name eq "gv") {
9d2c6865 3138 $var = "\$" . $self->deparse($var, 1);
6e90668e 3139 }
58cccf98 3140 $body = $kid->first->first->sibling; # skip OP_AND and OP_ITER
afb60448 3141 if (!is_state $body->first and $body->first->name !~ /^(?:stub|leave|scope)$/) {
cf24a840
SM
3142 confess unless $var eq '$_';
3143 $body = $body->first;
3144 return $self->deparse($body, 2) . " foreach ($ary)";
3145 }
3146 $head = "foreach $var ($ary) ";
3f872cb9 3147 } elsif ($kid->name eq "null") { # while/until
6e90668e 3148 $kid = $kid->first;
58cccf98
SM
3149 my $name = {"and" => "while", "or" => "until"}->{$kid->name};
3150 $cond = $self->deparse($kid->first, 1);
3151 $head = "$name ($cond) ";
3152 $body = $kid->first->sibling;
3f872cb9 3153 } elsif ($kid->name eq "stub") { # bare and empty
9d2c6865 3154 return "{;}"; # {} could be a hashref
6e90668e 3155 }
58cccf98 3156 # If there isn't a continue block, then the next pointer for the loop
241416b8 3157 # will point to the unstack, which is kid's last child, except
58cccf98 3158 # in a bare loop, when it will point to the leaveloop. When neither of
241416b8 3159 # these conditions hold, then the second-to-last child is the continue
58cccf98
SM
3160 # block (or the last in a bare loop).
3161 my $cont_start = $enter->nextop;
3162 my $cont;
241416b8 3163 if ($$cont_start != $$op && ${$cont_start} != ${$body->last}) {
58cccf98
SM
3164 if ($bare) {
3165 $cont = $body->last;
3166 } else {
3167 $cont = $body->first;
241416b8 3168 while (!null($cont->sibling->sibling)) {
58cccf98
SM
3169 $cont = $cont->sibling;
3170 }
3171 }
3172 my $state = $body->first;
3173 my $cuddle = $self->{'cuddle'};
3174 my @states;
3175 for (; $$state != $$cont; $state = $state->sibling) {
3176 push @states, $state;
3177 }
93a8ff62 3178 $body = $self->lineseq(undef, 0, @states);
58cccf98
SM
3179 if (defined $cond and not is_scope $cont and $self->{'expand'} < 3) {
3180 $head = "for ($init; $cond; " . $self->deparse($cont, 1) .") ";
3181 $cont = "\cK";
3182 } else {
3183 $cont = $cuddle . "continue {\n\t" .
3184 $self->deparse($cont, 0) . "\n\b}\cK";
6e90668e 3185 }
6e90668e 3186 } else {
7a9b44b9 3187 return "" if !defined $body;
c73811ab
RH
3188 if (length $init) {
3189 $head = "for ($init; $cond;) ";
3190 }
9d2c6865 3191 $cont = "\cK";
58cccf98 3192 $body = $self->deparse($body, 0);
6e90668e 3193 }
ce4e655d 3194 $body =~ s/;?$/;\n/;
34a48b4b
RH
3195
3196 return $head . "{\n\t" . $body . "\b}" . $cont;
58cccf98
SM
3197}
3198
09d856fb 3199sub pp_leaveloop { shift->loop_common(@_, "") }
58cccf98
SM
3200
3201sub for_loop {
3202 my $self = shift;
3203 my($op, $cx) = @_;
3204 my $init = $self->deparse($op, 1);
eae48c89
Z
3205 my $s = $op->sibling;
3206 my $ll = $s->name eq "unstack" ? $s->sibling : $s->first->sibling;
3207 return $self->loop_common($ll, $cx, $init);
6e90668e
SM
3208}
3209
3210sub pp_leavetry {
3211 my $self = shift;
9d2c6865 3212 return "eval {\n\t" . $self->pp_leave(@_) . "\n\b}";
bd0865ec 3213}
6e90668e 3214
7d3c8a68
SM
3215sub _op_is_or_was {
3216 my ($op, $expect_type) = @_;
3217 my $type = $op->type;
3218 return($type == $expect_type
3219 || ($type == OP_NULL && $op->targ == $expect_type));
3220}
3221
a798dbf2 3222sub pp_null {
6e90668e 3223 my $self = shift;
d989cdac 3224 my($op, $cx) = @_;
6e90668e 3225 if (class($op) eq "OP") {
f4a44678
SM
3226 # old value is lost
3227 return $self->{'ex_const'} if $op->targ == OP_CONST;
7d3c8a68
SM
3228 } elsif ($op->first->name eq 'pushmark'
3229 or $op->first->name eq 'null'
3230 && $op->first->targ == OP_PUSHMARK
3231 && _op_is_or_was($op, OP_LIST)) {
9d2c6865 3232 return $self->pp_list($op, $cx);
3f872cb9 3233 } elsif ($op->first->name eq "enter") {
9d2c6865 3234 return $self->pp_leave($op, $cx);
31c6271a
RD
3235 } elsif ($op->first->name eq "leave") {
3236 return $self->pp_leave($op->first, $cx);
3237 } elsif ($op->first->name eq "scope") {
3238 return $self->pp_scope($op->first, $cx);
bd0865ec 3239 } elsif ($op->targ == OP_STRINGIFY) {
6f611a1a 3240 return $self->dquote($op, $cx);
f4002a4b
FC
3241 } elsif ($op->targ == OP_GLOB) {
3242 return $self->pp_glob(
3243 $op->first # entersub
3244 ->first # ex-list
3245 ->first # pushmark
3246 ->sibling, # glob
3247 $cx
3248 );
6e90668e 3249 } elsif (!null($op->first->sibling) and
3f872cb9 3250 $op->first->sibling->name eq "readline" and
6e90668e 3251 $op->first->sibling->flags & OPf_STACKED) {
9d2c6865
SM
3252 return $self->maybe_parens($self->deparse($op->first, 7) . " = "
3253 . $self->deparse($op->first->sibling, 7),
3254 $cx, 7);
6e90668e 3255 } elsif (!null($op->first->sibling) and
3f872cb9 3256 $op->first->sibling->name eq "trans" and
6e90668e 3257 $op->first->sibling->flags & OPf_STACKED) {
9d2c6865
SM
3258 return $self->maybe_parens($self->deparse($op->first, 20) . " =~ "
3259 . $self->deparse($op->first->sibling, 20),
3260 $cx, 20);
d989cdac
SM
3261 } elsif ($op->flags & OPf_SPECIAL && $cx < 1 && !$op->targ) {
3262 return "do {\n\t". $self->deparse($op->first, $cx) ."\n\b};";
ad8caead
RGS
3263 } elsif (!null($op->first->sibling) and
3264 $op->first->sibling->name eq "null" and
3265 class($op->first->sibling) eq "UNOP" and
3266 $op->first->sibling->first->flags & OPf_STACKED and
3267 $op->first->sibling->first->name eq "rcatline") {
3268 return $self->maybe_parens($self->deparse($op->first, 18) . " .= "
3269 . $self->deparse($op->first->sibling, 18),
3270 $cx, 18);
6e90668e 3271 } else {
9d2c6865 3272 return $self->deparse($op->first, $cx);
6e90668e 3273 }
a798dbf2
MB
3274}
3275
6e90668e
SM
3276sub padname {
3277 my $self = shift;
3278 my $targ = shift;
68223ea3 3279 return $self->padname_sv($targ)->PVX;
6e90668e
SM
3280}
3281
3282sub padany {
3283 my $self = shift;
3284 my $op = shift;
3285 return substr($self->padname($op->targ), 1); # skip $/@/%
3286}
3287
3288sub pp_padsv {
3289 my $self = shift;
4da9a2ca
FC
3290 my($op, $cx, $forbid_parens) = @_;
3291 return $self->maybe_my($op, $cx, $self->padname($op->targ),
3292 $forbid_parens);
6e90668e
SM
3293}
3294
3295sub pp_padav { pp_padsv(@_) }
3296sub pp_padhv { pp_padsv(@_) }
3297
e0ab66ad 3298my @threadsv_names = B::threadsv_names;
f6f9bdb7
SM
3299sub pp_threadsv {
3300 my $self = shift;
9d2c6865
SM
3301 my($op, $cx) = @_;
3302 return $self->maybe_local($op, $cx, "\$" . $threadsv_names[$op->targ]);
d989cdac 3303}
f6f9bdb7 3304
6f611a1a 3305sub gv_or_padgv {
18228111
GS
3306 my $self = shift;
3307 my $op = shift;
6f611a1a
GS
3308 if (class($op) eq "PADOP") {
3309 return $self->padval($op->padix);
3310 } else { # class($op) eq "SVOP"
3311 return $op->gv;
18228111 3312 }
18228111
GS
3313}
3314
6e90668e
SM
3315sub pp_gvsv {
3316 my $self = shift;
9d2c6865 3317 my($op, $cx) = @_;
6f611a1a 3318 my $gv = $self->gv_or_padgv($op);
8510e997 3319 return $self->maybe_local($op, $cx, $self->stash_variable("\$",
bb8996b8 3320 $self->gv_name($gv), $cx));
6e90668e
SM
3321}
3322
3323sub pp_gv {
3324 my $self = shift;
9d2c6865 3325 my($op, $cx) = @_;
6f611a1a 3326 my $gv = $self->gv_or_padgv($op);
18228111 3327 return $self->gv_name($gv);
6e90668e
SM
3328}
3329
93bad3fd
NC
3330sub pp_aelemfast_lex {
3331 my $self = shift;
3332 my($op, $cx) = @_;
3333 my $name = $self->padname($op->targ);
3334 $name =~ s/^@/\$/;
b024352e
DM
3335 my $i = $op->private;
3336 $i -= 256 if $i > 127;
3337 return $name . "[" . ($i + $self->{'arybase'}) . "]";
93bad3fd
NC
3338}
3339
6e90668e
SM
3340sub pp_aelemfast {
3341 my $self = shift;
9d2c6865 3342 my($op, $cx) = @_;
93bad3fd
NC
3343 # optimised PADAV, pre 5.15
3344 return $self->pp_aelemfast_lex(@_) if ($op->flags & OPf_SPECIAL);
ce4e655d 3345
93bad3fd 3346 my $gv = $self->gv_or_padgv($op);
be6cf5cf
FC
3347 my($name,$quoted) = $self->stash_variable_name('@',$gv);
3348 $name = $quoted ? "$name->" : '$' . $name;
b024352e
DM
3349 my $i = $op->private;
3350 $i -= 256 if $i > 127;
3351 return $name . "[" . ($i + $self->{'arybase'}) . "]";
6e90668e
SM
3352}
3353
3354sub rv2x {
3355 my $self = shift;
9d2c6865 3356 my($op, $cx, $type) = @_;
90c0eb26
RH
3357
3358 if (class($op) eq 'NULL' || !$op->can("first")) {
ff97752d 3359 carp("Unexpected op in pp_rv2x");
90c0eb26
RH
3360 return 'XXX';
3361 }
6e90668e 3362 my $kid = $op->first;
d989cdac 3363 if ($kid->name eq "gv") {
bb8996b8 3364 return $self->stash_variable($type, $self->deparse($kid, 0), $cx);
d989cdac
SM
3365 } elsif (is_scalar $kid) {
3366 my $str = $self->deparse($kid, 0);
3367 if ($str =~ /^\$([^\w\d])\z/) {
3368 # "$$+" isn't a legal way to write the scalar dereference
3369 # of $+, since the lexer can't tell you aren't trying to
3370 # do something like "$$ + 1" to get one more than your
3371 # PID. Either "${$+}" or "$${+}" are workable
3372 # disambiguations, but if the programmer did the former,
3373 # they'd be in the "else" clause below rather than here.
3374 # It's not clear if this should somehow be unified with
3375 # the code in dq and re_dq that also adds lexer
3376 # disambiguation braces.
3377 $str = '$' . "{$1}"; #'
3378 }
3379 return $type . $str;
3380 } else {
3381 return $type . "{" . $self->deparse($kid, 0) . "}";
3382 }
6e90668e
SM
3383}
3384
3385sub pp_rv2sv { maybe_local(@_, rv2x(@_, "\$")) }
3386sub pp_rv2hv { maybe_local(@_, rv2x(@_, "%")) }
3387sub pp_rv2gv { maybe_local(@_, rv2x(@_, "*")) }
3388
3389# skip rv2av
3390sub pp_av2arylen {
3391 my $self = shift;
9d2c6865 3392 my($op, $cx) = @_;
3f872cb9 3393 if ($op->first->name eq "padav") {
9d2c6865 3394 return $self->maybe_local($op, $cx, '$#' . $self->padany($op->first));
6e90668e 3395 } else {
f5aa8f4e
SM
3396 return $self->maybe_local($op, $cx,
3397 $self->rv2x($op->first, $cx, '$#'));
6e90668e
SM
3398 }
3399}
3400
3401# skip down to the old, ex-rv2cv
90c0eb26
RH
3402sub pp_rv2cv {
3403 my ($self, $op, $cx) = @_;
3404 if (!null($op->first) && $op->first->name eq 'null' &&
76e14ed3 3405 $op->first->targ == OP_LIST)
90c0eb26
RH
3406 {
3407 return $self->rv2x($op->first->first->sibling, $cx, "&")
3408 }
3409 else {
3410 return $self->rv2x($op, $cx, "")
3411 }
3412}
6e90668e 3413
d989cdac
SM
3414sub list_const {
3415 my $self = shift;
3416 my($cx, @list) = @_;
3417 my @a = map $self->const($_, 6), @list;
3418 if (@a == 0) {
3419 return "()";
3420 } elsif (@a == 1) {
3421 return $a[0];
3422 } elsif ( @a > 2 and !grep(!/^-?\d+$/, @a)) {
3423 # collapse (-1,0,1,2) into (-1..2)
3424 my ($s, $e) = @a[0,-1];
3425 my $i = $s;
3426 return $self->maybe_parens("$s..$e", $cx, 9)
3427 unless grep $i++ != $_, @a;
3428 }
3429 return $self->maybe_parens(join(", ", @a), $cx, 6);
3430}
3431
6e90668e
SM
3432sub pp_rv2av {
3433 my $self = shift;
9d2c6865 3434 my($op, $cx) = @_;
6e90668e 3435 my $kid = $op->first;
3f872cb9 3436 if ($kid->name eq "const") { # constant list
18228111 3437 my $av = $self->const_sv($kid);
d989cdac 3438 return $self->list_const($cx, $av->ARRAY);
6e90668e 3439 } else {
9d2c6865 3440 return $self->maybe_local($op, $cx, $self->rv2x($op, $cx, "\@"));
6e90668e
SM
3441 }
3442 }
3443
3ed82cfc
GS
3444sub is_subscriptable {
3445 my $op = shift;
3446 if ($op->name =~ /^[ahg]elem/) {
3447 return 1;
3448 } elsif ($op->name eq "entersub") {
3449 my $kid = $op->first;
3450 return 0 unless null $kid->sibling;
3451 $kid = $kid->first;
3452 $kid = $kid->sibling until null $kid->sibling;
3453 return 0 if is_scope($kid);
3454 $kid = $kid->first;