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#line 1 "B/Deparse.pm"
# B::Deparse.pm
# Copyright (c) 1998-2000, 2002, 2003, 2004, 2005, 2006 Stephen McCamant.
# All rights reserved.
# This module is free software; you can redistribute and/or modify
# it under the same terms as Perl itself.
# This is based on the module of the same name by Malcolm Beattie,
# but essentially none of his code remains.
package B::Deparse;
use Carp;
use B qw(class main_root main_start main_cv svref_2object opnumber perlstring
OPf_WANT OPf_WANT_VOID OPf_WANT_SCALAR OPf_WANT_LIST
OPf_KIDS OPf_REF OPf_STACKED OPf_SPECIAL OPf_MOD
OPpLVAL_INTRO OPpOUR_INTRO OPpENTERSUB_AMPER OPpSLICE OPpCONST_BARE
OPpTRANS_SQUASH OPpTRANS_DELETE OPpTRANS_COMPLEMENT OPpTARGET_MY
OPpEXISTS_SUB OPpSORT_NUMERIC OPpSORT_INTEGER
OPpSORT_REVERSE
SVf_IOK SVf_NOK SVf_ROK SVf_POK SVpad_OUR SVf_FAKE SVs_RMG SVs_SMG
CVf_METHOD CVf_LVALUE
PMf_KEEP PMf_GLOBAL PMf_CONTINUE PMf_EVAL PMf_ONCE
PMf_MULTILINE PMf_SINGLELINE PMf_FOLD PMf_EXTENDED);
$VERSION = '1.26';
use strict;
use vars qw/$AUTOLOAD/;
use warnings ();
require feature;
BEGIN {
# List version-specific constants here.
# Easiest way to keep this code portable between version looks to
# be to fake up a dummy constant that will never actually be true.
foreach (qw(OPpSORT_INPLACE OPpSORT_DESCEND OPpITER_REVERSED OPpCONST_NOVER
OPpPAD_STATE PMf_SKIPWHITE RXf_SKIPWHITE
RXf_PMf_CHARSET RXf_PMf_KEEPCOPY
CVf_LOCKED OPpREVERSE_INPLACE OPpSUBSTR_REPL_FIRST
PMf_NONDESTRUCT OPpCONST_ARYBASE OPpEVAL_BYTES)) {
eval { import B $_ };
no strict 'refs';
*{$_} = sub () {0} unless *{$_}{CODE};
}
}
# Changes between 0.50 and 0.51:
# - fixed nulled leave with live enter in sort { }
# - fixed reference constants (\"str")
# - handle empty programs gracefully
# - handle infinite loops (for (;;) {}, while (1) {})
# - differentiate between 'for my $x ...' and 'my $x; for $x ...'
# - various minor cleanups
# - moved globals into an object
# - added '-u', like B::C
# - package declarations using cop_stash
# - subs, formats and code sorted by cop_seq
# Changes between 0.51 and 0.52:
# - added pp_threadsv (special variables under USE_5005THREADS)
# - added documentation
# Changes between 0.52 and 0.53:
# - many changes adding precedence contexts and associativity
# - added '-p' and '-s' output style options
# - various other minor fixes
# Changes between 0.53 and 0.54:
# - added support for new 'for (1..100)' optimization,
# thanks to Gisle Aas
# Changes between 0.54 and 0.55:
# - added support for new qr// construct
# - added support for new pp_regcreset OP
# Changes between 0.55 and 0.56:
# - tested on base/*.t, cmd/*.t, comp/*.t, io/*.t
# - fixed $# on non-lexicals broken in last big rewrite
# - added temporary fix for change in opcode of OP_STRINGIFY
# - fixed problem in 0.54's for() patch in 'for (@ary)'
# - fixed precedence in conditional of ?:
# - tweaked list paren elimination in 'my($x) = @_'
# - made continue-block detection trickier wrt. null ops
# - fixed various prototype problems in pp_entersub
# - added support for sub prototypes that never get GVs
# - added unquoting for special filehandle first arg in truncate
# - print doubled rv2gv (a bug) as '*{*GV}' instead of illegal '**GV'
# - added semicolons at the ends of blocks
# - added -l '#line' declaration option -- fixes cmd/subval.t 27,28
# Changes between 0.56 and 0.561:
# - fixed multiply-declared my var in pp_truncate (thanks to Sarathy)
# - used new B.pm symbolic constants (done by Nick Ing-Simmons)
# Changes between 0.561 and 0.57:
# - stylistic changes to symbolic constant stuff
# - handled scope in s///e replacement code
# - added unquote option for expanding "" into concats, etc.
# - split method and proto parts of pp_entersub into separate functions
# - various minor cleanups
# Changes after 0.57:
# - added parens in \&foo (patch by Albert Dvornik)
# Changes between 0.57 and 0.58:
# - fixed '0' statements that weren't being printed
# - added methods for use from other programs
# (based on patches from James Duncan and Hugo van der Sanden)
# - added -si and -sT to control indenting (also based on a patch from Hugo)
# - added -sv to print something else instead of '???'
# - preliminary version of utf8 tr/// handling
# Changes after 0.58:
# - uses of $op->ppaddr changed to new $op->name (done by Sarathy)
# - added support for Hugo's new OP_SETSTATE (like nextstate)
# Changes between 0.58 and 0.59
# - added support for Chip's OP_METHOD_NAMED
# - added support for Ilya's OPpTARGET_MY optimization
# - elided arrows before '()' subscripts when possible
# Changes between 0.59 and 0.60
# - support for method attributes was added
# - some warnings fixed
# - separate recognition of constant subs
# - rewrote continue block handling, now recognizing for loops
# - added more control of expanding control structures
# Changes between 0.60 and 0.61 (mostly by Robin Houston)
# - many bug-fixes
# - support for pragmas and 'use'
# - support for the little-used $[ variable
# - support for __DATA__ sections
# - UTF8 support
# - BEGIN, CHECK, INIT and END blocks
# - scoping of subroutine declarations fixed
# - compile-time output from the input program can be suppressed, so that the
# output is just the deparsed code. (a change to O.pm in fact)
# - our() declarations
# - *all* the known bugs are now listed in the BUGS section
# - comprehensive test mechanism (TEST -deparse)
# Changes between 0.62 and 0.63 (mostly by Rafael Garcia-Suarez)
# - bug-fixes
# - new switch -P
# - support for command-line switches (-l, -0, etc.)
# Changes between 0.63 and 0.64
# - support for //, CHECK blocks, and assertions
# - improved handling of foreach loops and lexicals
# - option to use Data::Dumper for constants
# - more bug fixes
# - discovered lots more bugs not yet fixed
#
# ...
#
# Changes between 0.72 and 0.73
# - support new switch constructs
# Todo:
# (See also BUGS section at the end of this file)
#
# - finish tr/// changes
# - add option for even more parens (generalize \&foo change)
# - left/right context
# - copy comments (look at real text with $^P?)
# - avoid semis in one-statement blocks
# - associativity of &&=, ||=, ?:
# - ',' => '=>' (auto-unquote?)
# - break long lines ("\r" as discretionary break?)
# - configurable syntax highlighting: ANSI color, HTML, TeX, etc.
# - more style options: brace style, hex vs. octal, quotes, ...
# - print big ints as hex/octal instead of decimal (heuristic?)
# - handle 'my $x if 0'?
# - version using op_next instead of op_first/sibling?
# - avoid string copies (pass arrays, one big join?)
# - here-docs?
# Current test.deparse failures
# comp/hints 6 - location of BEGIN blocks wrt. block openings
# run/switchI 1 - missing -I switches entirely
# perl -Ifoo -e 'print @INC'
# op/caller 2 - warning mask propagates backwards before warnings::register
# 'use warnings; BEGIN {${^WARNING_BITS} eq "U"x12;} use warnings::register'
# op/getpid 2 - can't assign to shared my() declaration (threads only)
# 'my $x : shared = 5'
# op/override 7 - parens on overridden require change v-string interpretation
# 'BEGIN{*CORE::GLOBAL::require=sub {}} require v5.6'
# c.f. 'BEGIN { *f = sub {0} }; f 2'
# op/pat 774 - losing Unicode-ness of Latin1-only strings
# 'use charnames ":short"; $x="\N{latin:a with acute}"'
# op/recurse 12 - missing parens on recursive call makes it look like method
# 'sub f { f($x) }'
# op/subst 90 - inconsistent handling of utf8 under "use utf8"
# op/taint 29 - "use re 'taint'" deparsed in the wrong place wrt. block open
# op/tiehandle compile - "use strict" deparsed in the wrong place
# uni/tr_ several
# ext/B/t/xref 11 - line numbers when we add newlines to one-line subs
# ext/Data/Dumper/t/dumper compile
# ext/DB_file/several
# ext/Encode/several
# ext/Ernno/Errno warnings
# ext/IO/lib/IO/t/io_sel 23
# ext/PerlIO/t/encoding compile
# ext/POSIX/t/posix 6
# ext/Socket/Socket 8
# ext/Storable/t/croak compile
# lib/Attribute/Handlers/t/multi compile
# lib/bignum/ several
# lib/charnames 35
# lib/constant 32
# lib/English 40
# lib/ExtUtils/t/bytes 4
# lib/File/DosGlob compile
# lib/Filter/Simple/t/data 1
# lib/Math/BigInt/t/constant 1
# lib/Net/t/config Deparse-warning
# lib/overload compile
# lib/Switch/ several
# lib/Symbol 4
# lib/Test/Simple several
# lib/Term/Complete
# lib/Tie/File/t/29_downcopy 5
# lib/vars 22
# Object fields (were globals):
#
# avoid_local:
# (local($a), local($b)) and local($a, $b) have the same internal
# representation but the short form looks better. We notice we can
# use a large-scale local when checking the list, but need to prevent
# individual locals too. This hash holds the addresses of OPs that
# have already had their local-ness accounted for. The same thing
# is done with my().
#
# curcv:
# CV for current sub (or main program) being deparsed
#
# curcvlex:
# Cached hash of lexical variables for curcv: keys are
# names prefixed with "m" or "o" (representing my/our), and
# each value is an array of pairs, indicating the cop_seq of scopes
# in which a var of that name is valid.
#
# curcop:
# COP for statement being deparsed
#
# curstash:
# name of the current package for deparsed code
#
# subs_todo:
# array of [cop_seq, CV, is_format?] for subs and formats we still
# want to deparse
#
# protos_todo:
# as above, but [name, prototype] for subs that never got a GV
#
# subs_done, forms_done:
# keys are addresses of GVs for subs and formats we've already
# deparsed (or at least put into subs_todo)
#
# subs_declared
# keys are names of subs for which we've printed declarations.
# That means we can omit parentheses from the arguments. It also means we
# need to put CORE:: on core functions of the same name.
#
# subs_deparsed
# Keeps track of fully qualified names of all deparsed subs.
#
# in_subst_repl
# True when deparsing the replacement part of a substitution.
#
# parens: -p
# linenums: -l
# unquote: -q
# cuddle: ' ' or '\n', depending on -sC
# indent_size: -si
# use_tabs: -sT
# ex_const: -sv
# A little explanation of how precedence contexts and associativity
# work:
#
# deparse() calls each per-op subroutine with an argument $cx (short
# for context, but not the same as the cx* in the perl core), which is
# a number describing the op's parents in terms of precedence, whether
# they're inside an expression or at statement level, etc. (see
# chart below). When ops with children call deparse on them, they pass
# along their precedence. Fractional values are used to implement
# associativity ('($x + $y) + $z' => '$x + $y + $y') and related
# parentheses hacks. The major disadvantage of this scheme is that
# it doesn't know about right sides and left sides, so say if you
# assign a listop to a variable, it can't tell it's allowed to leave
# the parens off the listop.
# Precedences:
# 26 [TODO] inside interpolation context ("")
# 25 left terms and list operators (leftward)
# 24 left ->
# 23 nonassoc ++ --
# 22 right **
# 21 right ! ~ \ and unary + and -
# 20 left =~ !~
# 19 left * / % x
# 18 left + - .
# 17 left << >>
# 16 nonassoc named unary operators
# 15 nonassoc < > <= >= lt gt le ge
# 14 nonassoc == != <=> eq ne cmp
# 13 left &
# 12 left | ^
# 11 left &&
# 10 left ||
# 9 nonassoc .. ...
# 8 right ?:
# 7 right = += -= *= etc.
# 6 left , =>
# 5 nonassoc list operators (rightward)
# 4 right not
# 3 left and
# 2 left or xor
# 1 statement modifiers
# 0.5 statements, but still print scopes as do { ... }
# 0 statement level
# -1 format body
# Nonprinting characters with special meaning:
# \cS - steal parens (see maybe_parens_unop)
# \n - newline and indent
# \t - increase indent
# \b - decrease indent ('outdent')
# \f - flush left (no indent)
# \cK - kill following semicolon, if any
BEGIN { for (qw[ const stringify rv2sv list glob pushmark null]) {
eval "sub OP_\U$_ () { " . opnumber($_) . "}"
}}
# _pessimise_walk(): recursively walk the optree of a sub,
# possibly undoing optimisations along the way.
sub _pessimise_walk {
my ($self, $startop) = @_;
return unless $$startop;
my ($op, $prevop);
for ($op = $startop; $$op; $prevop = $op, $op = $op->sibling) {
my $ppname = $op->name;
# pessimisations start here
if ($ppname eq "padrange") {
# remove PADRANGE:
# the original optimisation either (1) changed this:
# pushmark -> (various pad and list and null ops) -> the_rest
# or (2), for the = @_ case, changed this:
# pushmark -> gv[_] -> rv2av -> (pad stuff) -> the_rest
# into this:
# padrange ----------------------------------------> the_rest
# so we just need to convert the padrange back into a
# pushmark, and in case (1), set its op_next to op_sibling,
# which is the head of the original chain of optimised-away
# pad ops, or for (2), set it to sibling->first, which is
# the original gv[_].
$B::overlay->{$$op} = {
type => OP_PUSHMARK,
name => 'pushmark',
private => ($op->private & OPpLVAL_INTRO),
next => ($op->flags & OPf_SPECIAL)
? $op->sibling->first
: $op->sibling,
};
}
# pessimisations end here
if (class($op) eq 'PMOP'
&& ref($op->pmreplroot)
&& ${$op->pmreplroot}
&& $op->pmreplroot->isa( 'B::OP' ))
{
$self-> _pessimise_walk($op->pmreplroot);
}
if ($op->flags & OPf_KIDS) {
$self-> _pessimise_walk($op->first);
}
}
}
# _pessimise_walk_exe(): recursively walk the op_next chain of a sub,
# possibly undoing optimisations along the way.
sub _pessimise_walk_exe {
my ($self, $startop, $visited) = @_;
return unless $$startop;
return if $visited->{$$startop};
my ($op, $prevop);
for ($op = $startop; $$op; $prevop = $op, $op = $op->next) {
last if $visited->{$$op};
$visited->{$$op} = 1;
my $ppname = $op->name;
if ($ppname =~
/^((and|d?or)(assign)?|(map|grep)while|range|cond_expr|once)$/
# entertry is also a logop, but its op_other invariably points
# into the same chain as the main execution path, so we skip it
) {
$self->_pessimise_walk_exe($op->other, $visited);
}
elsif ($ppname eq "subst") {
$self->_pessimise_walk_exe($op->pmreplstart, $visited);
}
elsif ($ppname =~ /^(enter(loop|iter))$/) {
# redoop and nextop will already be covered by the main block
# of the loop
$self->_pessimise_walk_exe($op->lastop, $visited);
}
# pessimisations start here
}
}
# Go through an optree and "remove" some optimisations by using an
# overlay to selectively modify or un-null some ops. Deparsing in the
# absence of those optimisations is then easier.
#
# Note that older optimisations are not removed, as Deparse was already
# written to recognise them before the pessimise/overlay system was added.
sub pessimise {
my ($self, $root, $start) = @_;
# walk tree in root-to-branch order
$self->_pessimise_walk($root);
my %visited;
# walk tree in execution order
$self->_pessimise_walk_exe($start, \%visited);
}
sub null {
my $op = shift;
return class($op) eq "NULL";
}
sub todo {
my $self = shift;
my($cv, $is_form) = @_;
return unless ($cv->FILE eq $0 || exists $self->{files}{$cv->FILE});
my $seq;
if ($cv->OUTSIDE_SEQ) {
$seq = $cv->OUTSIDE_SEQ;
} elsif (!null($cv->START) and is_state($cv->START)) {
$seq = $cv->START->cop_seq;
} else {
$seq = 0;
}
push @{$self->{'subs_todo'}}, [$seq, $cv, $is_form];
unless ($is_form || class($cv->STASH) eq 'SPECIAL') {
$self->{'subs_deparsed'}{$cv->STASH->NAME."::".$cv->GV->NAME} = 1;
}
}
sub next_todo {
my $self = shift;
my $ent = shift @{$self->{'subs_todo'}};
my $cv = $ent->[1];
my $gv = $cv->GV;
my $name = $self->gv_name($gv);
if ($ent->[2]) {
return "format $name =\n"
. $self->deparse_format($ent->[1]). "\n";
} else {
$self->{'subs_declared'}{$name} = 1;
if ($name eq "BEGIN") {
my $use_dec = $self->begin_is_use($cv);
if (defined ($use_dec) and $self->{'expand'} < 5) {
return () if 0 == length($use_dec);
return $use_dec;
}
}
my $l = '';
if ($self->{'linenums'}) {
my $line = $gv->LINE;
my $file = $gv->FILE;
$l = "\n\f#line $line \"$file\"\n";
}
my $p = '';
if (class($cv->STASH) ne "SPECIAL") {
my $stash = $cv->STASH->NAME;
if ($stash ne $self->{'curstash'}) {
$p = "package $stash;\n";
$name = "$self->{'curstash'}::$name" unless $name =~ /::/;
$self->{'curstash'} = $stash;
}
$name =~ s/^\Q$stash\E::(?!\z|.*::)//;
}
return "${p}${l}sub $name " . $self->deparse_sub($cv);
}
}
# Return a "use" declaration for this BEGIN block, if appropriate
sub begin_is_use {
my ($self, $cv) = @_;
my $root = $cv->ROOT;
local @$self{qw'curcv curcvlex'} = ($cv);
local $B::overlay = {};
$self->pessimise($root, $cv->START);
#require B::Debug;
#B::walkoptree($cv->ROOT, "debug");
my $lineseq = $root->first;
return if $lineseq->name ne "lineseq";
my $req_op = $lineseq->first->sibling;
return if $req_op->name ne "require";
my $module;
if ($req_op->first->private & OPpCONST_BARE) {
# Actually it should always be a bareword
$module = $self->const_sv($req_op->first)->PV;
$module =~ s[/][::]g;
$module =~ s/.pm$//;
}
else {
$module = $self->const($self->const_sv($req_op->first), 6);
}
my $version;
my $version_op = $req_op->sibling;
return if class($version_op) eq "NULL";
if ($version_op->name eq "lineseq") {
# We have a version parameter; skip nextstate & pushmark
my $constop = $version_op->first->next->next;
return unless $self->const_sv($constop)->PV eq $module;
$constop = $constop->sibling;
$version = $self->const_sv($constop);
if (class($version) eq "IV") {
$version = $version->int_value;
} elsif (class($version) eq "NV") {
$version = $version->NV;
} elsif (class($version) ne "PVMG") {
# Includes PVIV and PVNV
$version = $version->PV;
} else {
# version specified as a v-string
$version = 'v'.join '.', map ord, split //, $version->PV;
}
$constop = $constop->sibling;
return if $constop->name ne "method_named";
return if $self->const_sv($constop)->PV ne "VERSION";
}
$lineseq = $version_op->sibling;
return if $lineseq->name ne "lineseq";
my $entersub = $lineseq->first->sibling;
if ($entersub->name eq "stub") {
return "use $module $version ();\n" if defined $version;
return "use $module ();\n";
}
return if $entersub->name ne "entersub";
# See if there are import arguments
my $args = '';
my $svop = $entersub->first->sibling; # Skip over pushmark
return unless $self->const_sv($svop)->PV eq $module;
# Pull out the arguments
for ($svop=$svop->sibling; $svop->name ne "method_named";
$svop = $svop->sibling) {
$args .= ", " if length($args);
$args .= $self->deparse($svop, 6);
}
my $use = 'use';
my $method_named = $svop;
return if $method_named->name ne "method_named";
my $method_name = $self->const_sv($method_named)->PV;
if ($method_name eq "unimport") {
$use = 'no';
}
# Certain pragmas are dealt with using hint bits,
# so we ignore them here
if ($module eq 'strict' || $module eq 'integer'
|| $module eq 'bytes' || $module eq 'warnings'
|| $module eq 'feature') {
return "";
}
if (defined $version && length $args) {
return "$use $module $version ($args);\n";
} elsif (defined $version) {
return "$use $module $version;\n";
} elsif (length $args) {
return "$use $module ($args);\n";
} else {
return "$use $module;\n";
}
}
sub stash_subs {
my ($self, $pack, $seen) = @_;
my (@ret, $stash);
if (!defined $pack) {
$pack = '';
$stash = \%::;
}
else {
$pack =~ s/(::)?$/::/;
no strict 'refs';
$stash = \%{"main::$pack"};
}
return
if ($seen ||= {})->{
$INC{"overload.pm"} ? overload::StrVal($stash) : $stash
}++;
my %stash = svref_2object($stash)->ARRAY;
while (my ($key, $val) = each %stash) {
my $class = class($val);
if ($class eq "PV") {
# Just a prototype. As an ugly but fairly effective way
# to find out if it belongs here is to see if the AUTOLOAD
# (if any) for the stash was defined in one of our files.
my $A = $stash{"AUTOLOAD"};
if (defined ($A) && class($A) eq "GV" && defined($A->CV)
&& class($A->CV) eq "CV") {
my $AF = $A->FILE;
next unless $AF eq $0 || exists $self->{'files'}{$AF};
}
push @{$self->{'protos_todo'}}, [$pack . $key, $val->PV];
} elsif ($class eq "IV" && !($val->FLAGS & SVf_ROK)) {
# Just a name. As above.
# But skip proxy constant subroutines, as some form of perl-space
# visible code must have created them, be it a use statement, or
# some direct symbol-table manipulation code that we will Deparse
my $A = $stash{"AUTOLOAD"};
if (defined ($A) && class($A) eq "GV" && defined($A->CV)
&& class($A->CV) eq "CV") {
my $AF = $A->FILE;
next unless $AF eq $0 || exists $self->{'files'}{$AF};
}
push @{$self->{'protos_todo'}}, [$pack . $key, undef];
} elsif ($class eq "GV") {
if (class(my $cv = $val->CV) ne "SPECIAL") {
next if $self->{'subs_done'}{$$val}++;
next if $$val != ${$cv->GV}; # Ignore imposters
$self->todo($cv, 0);
}
if (class(my $cv = $val->FORM) ne "SPECIAL") {
next if $self->{'forms_done'}{$$val}++;
next if $$val != ${$cv->GV}; # Ignore imposters
$self->todo($cv, 1);
}
if (class($val->HV) ne "SPECIAL" && $key =~ /::$/) {
$self->stash_subs($pack . $key, $seen);
}
}
}
}
sub print_protos {
my $self = shift;
my $ar;
my @ret;
foreach $ar (@{$self->{'protos_todo'}}) {
my $proto = (defined $ar->[1] ? " (". $ar->[1] . ")" : "");
push @ret, "sub " . $ar->[0] . "$proto;\n";
}
delete $self->{'protos_todo'};
return @ret;
}
sub style_opts {
my $self = shift;
my $opts = shift;
my $opt;
while (length($opt = substr($opts, 0, 1))) {
if ($opt eq "C") {
$self->{'cuddle'} = " ";
$opts = substr($opts, 1);
} elsif ($opt eq "i") {
$opts =~ s/^i(\d+)//;
$self->{'indent_size'} = $1;
} elsif ($opt eq "T") {
$self->{'use_tabs'} = 1;
$opts = substr($opts, 1);
} elsif ($opt eq "v") {
$opts =~ s/^v([^.]*)(.|$)//;
$self->{'ex_const'} = $1;
}
}
}
sub new {
my $class = shift;
my $self = bless {}, $class;
$self->{'cuddle'} = "\n";
$self->{'curcop'} = undef;
$self->{'curstash'} = "main";
$self->{'ex_const'} = "'???'";
$self->{'expand'} = 0;
$self->{'files'} = {};
$self->{'indent_size'} = 4;
$self->{'linenums'} = 0;
$self->{'parens'} = 0;
$self->{'subs_todo'} = [];
$self->{'unquote'} = 0;
$self->{'use_dumper'} = 0;
$self->{'use_tabs'} = 0;
$self->{'ambient_arybase'} = 0;
$self->{'ambient_warnings'} = undef; # Assume no lexical warnings
$self->{'ambient_hints'} = 0;
$self->{'ambient_hinthash'} = undef;
$self->init();
while (my $arg = shift @_) {
if ($arg eq "-d") {
$self->{'use_dumper'} = 1;
require Data::Dumper;
} elsif ($arg =~ /^-f(.*)/) {
$self->{'files'}{$1} = 1;
} elsif ($arg eq "-l") {
$self->{'linenums'} = 1;
} elsif ($arg eq "-p") {
$self->{'parens'} = 1;
} elsif ($arg eq "-P") {
$self->{'noproto'} = 1;
} elsif ($arg eq "-q") {
$self->{'unquote'} = 1;
} elsif (substr($arg, 0, 2) eq "-s") {
$self->style_opts(substr $arg, 2);
} elsif ($arg =~ /^-x(\d)$/) {
$self->{'expand'} = $1;
}
}
return $self;
}
{
# Mask out the bits that L<warnings::register> uses
my $WARN_MASK;
BEGIN {
$WARN_MASK = $warnings::Bits{all} | $warnings::DeadBits{all};
}
sub WARN_MASK () {
return $WARN_MASK;
}
}
# Initialise the contextual information, either from
# defaults provided with the ambient_pragmas method,
# or from perl's own defaults otherwise.
sub init {
my $self = shift;
$self->{'arybase'} = $self->{'ambient_arybase'};
$self->{'warnings'} = defined ($self->{'ambient_warnings'})
? $self->{'ambient_warnings'} & WARN_MASK
: undef;
$self->{'hints'} = $self->{'ambient_hints'};
$self->{'hints'} &= 0xFF if $] < 5.009;
$self->{'hinthash'} = $self->{'ambient_hinthash'};
# also a convenient place to clear out subs_declared
delete $self->{'subs_declared'};
}
sub compile {
my(@args) = @_;
return sub {
my $self = B::Deparse->new(@args);
# First deparse command-line args
if (defined $^I) { # deparse -i
print q(BEGIN { $^I = ).perlstring($^I).qq(; }\n);
}
if ($^W) { # deparse -w
print qq(BEGIN { \$^W = $^W; }\n);
}
if ($/ ne "\n" or defined $O::savebackslash) { # deparse -l and -0
my $fs = perlstring($/) || 'undef';
my $bs = perlstring($O::savebackslash) || 'undef';
print qq(BEGIN { \$/ = $fs; \$\\ = $bs; }\n);
}
my @BEGINs = B::begin_av->isa("B::AV") ? B::begin_av->ARRAY : ();
my @UNITCHECKs = B::unitcheck_av->isa("B::AV")
? B::unitcheck_av->ARRAY
: ();
my @CHECKs = B::check_av->isa("B::AV") ? B::check_av->ARRAY : ();
my @INITs = B::init_av->isa("B::AV") ? B::init_av->ARRAY : ();
my @ENDs = B::end_av->isa("B::AV") ? B::end_av->ARRAY : ();
for my $block (@BEGINs, @UNITCHECKs, @CHECKs, @INITs, @ENDs) {
$self->todo($block, 0);
}
$self->stash_subs();
local($SIG{"__DIE__"}) =
sub {
if ($self->{'curcop'}) {
my $cop = $self->{'curcop'};
my($line, $file) = ($cop->line, $cop->file);
print STDERR "While deparsing $file near line $line,\n";
}
};
$self->{'curcv'} = main_cv;
$self->{'curcvlex'} = undef;
print $self->print_protos;
@{$self->{'subs_todo'}} =
sort {$a->[0] <=> $b->[0]} @{$self->{'subs_todo'}};
my $root = main_root;
local $B::overlay = {};
unless (null $root) {
$self->pessimise($root, main_start);
print $self->indent($self->deparse_root($root)), "\n";
}
my @text;
while (scalar(@{$self->{'subs_todo'}})) {
push @text, $self->next_todo;
}
print $self->indent(join("", @text)), "\n" if @text;
# Print __DATA__ section, if necessary
no strict 'refs';
my $laststash = defined $self->{'curcop'}
? $self->{'curcop'}->stash->NAME : $self->{'curstash'};
if (defined *{$laststash."::DATA"}{IO}) {
print "package $laststash;\n"
unless $laststash eq $self->{'curstash'};
print "__DATA__\n";
print readline(*{$laststash."::DATA"});
}
}
}
sub coderef2text {
my $self = shift;
my $sub = shift;
croak "Usage: ->coderef2text(CODEREF)" unless UNIVERSAL::isa($sub, "CODE");
$self->init();
return $self->indent($self->deparse_sub(svref_2object($sub)));
}
my %strict_bits = do {
local $^H;
map +($_ => strict::bits($_)), qw/refs subs vars/
};
sub ambient_pragmas {
my $self = shift;
my ($arybase, $hint_bits, $warning_bits, $hinthash) = (0, 0);
while (@_ > 1) {
my $name = shift();
my $val = shift();
if ($name eq 'strict') {
require strict;
if ($val eq 'none') {
$hint_bits &= $strict_bits{$_} for qw/refs subs vars/;
next();
}
my @names;
if ($val eq "all") {
@names = qw/refs subs vars/;
}
elsif (ref $val) {
@names = @$val;
}
else {
@names = split' ', $val;
}
$hint_bits |= $strict_bits{$_} for @names;
}
elsif ($name eq '$[') {
if (OPpCONST_ARYBASE) {
$arybase = $val;
} else {
croak "\$[ can't be non-zero on this perl" unless $val == 0;
}
}
elsif ($name eq 'integer'
|| $name eq 'bytes'
|| $name eq 'utf8') {
require "$name.pm";
if ($val) {
$hint_bits |= ${$::{"${name}::"}{"hint_bits"}};
}
else {
$hint_bits &= ~${$::{"${name}::"}{"hint_bits"}};
}
}
elsif ($name eq 're') {
require re;
if ($val eq 'none') {
$hint_bits &= ~re::bits(qw/taint eval/);
next();
}
my @names;
if ($val eq 'all') {
@names = qw/taint eval/;
}
elsif (ref $val) {
@names = @$val;
}
else {
@names = split' ',$val;
}
$hint_bits |= re::bits(@names);
}
elsif ($name eq 'warnings') {
if ($val eq 'none') {
$warning_bits = $warnings::NONE;
next();
}
my @names;
if (ref $val) {
@names = @$val;
}
else {
@names = split/\s+/, $val;
}
$warning_bits = $warnings::NONE if !defined ($warning_bits);
$warning_bits |= warnings::bits(@names);
}
elsif ($name eq 'warning_bits') {
$warning_bits = $val;
}
elsif ($name eq 'hint_bits') {
$hint_bits = $val;
}
elsif ($name eq '%^H') {
$hinthash = $val;
}
else {
croak "Unknown pragma type: $name";
}
}
if (@_) {
croak "The ambient_pragmas method expects an even number of args";
}
$self->{'ambient_arybase'} = $arybase;
$self->{'ambient_warnings'} = $warning_bits;
$self->{'ambient_hints'} = $hint_bits;
$self->{'ambient_hinthash'} = $hinthash;
}
# This method is the inner loop, so try to keep it simple
sub deparse {
my $self = shift;
my($op, $cx) = @_;
Carp::confess("Null op in deparse") if !defined($op)
|| class($op) eq "NULL";
my $meth = "pp_" . $op->name;
return $self->$meth($op, $cx);
}
sub indent {
my $self = shift;
my $txt = shift;
my @lines = split(/\n/, $txt);
my $leader = "";
my $level = 0;
my $line;
for $line (@lines) {
my $cmd = substr($line, 0, 1);
if ($cmd eq "\t" or $cmd eq "\b") {
$level += ($cmd eq "\t" ? 1 : -1) * $self->{'indent_size'};
if ($self->{'use_tabs'}) {
$leader = "\t" x ($level / 8) . " " x ($level % 8);
} else {
$leader = " " x $level;
}
$line = substr($line, 1);
}
if (index($line, "\f") > 0) {
$line =~ s/\f/\n/;
}
if (substr($line, 0, 1) eq "\f") {
$line = substr($line, 1); # no indent
} else {
$line = $leader . $line;
}
$line =~ s/\cK;?//g;
}
return join("\n", @lines);
}
sub deparse_sub {
my $self = shift;
my $cv = shift;
my $proto = "";
Carp::confess("NULL in deparse_sub") if !defined($cv) || $cv->isa("B::NULL");
Carp::confess("SPECIAL in deparse_sub") if $cv->isa("B::SPECIAL");
local $self->{'curcop'} = $self->{'curcop'};
if ($cv->FLAGS & SVf_POK) {
$proto = "(". $cv->PV . ") ";
}
if ($cv->CvFLAGS & (CVf_METHOD|CVf_LOCKED|CVf_LVALUE)) {
$proto .= ": ";
$proto .= "lvalue " if $cv->CvFLAGS & CVf_LVALUE;
$proto .= "locked " if $cv->CvFLAGS & CVf_LOCKED;
$proto .= "method " if $cv->CvFLAGS & CVf_METHOD;
}
local($self->{'curcv'}) = $cv;
local($self->{'curcvlex'});
local(@$self{qw'curstash warnings hints hinthash'})
= @$self{qw'curstash warnings hints hinthash'};
my $body;
my $root = $cv->ROOT;
local $B::overlay = {};
if (not null $root) {
$self->pessimise($root, $cv->START);
my $lineseq = $root->first;
if ($lineseq->name eq "lineseq") {
my @ops;
for(my$o=$lineseq->first; $$o; $o=$o->sibling) {
push @ops, $o;
}
$body = $self->lineseq(undef, 0, @ops).";";
my $scope_en = $self->find_scope_en($lineseq);
if (defined $scope_en) {
my $subs = join"", $self->seq_subs($scope_en);
$body .= ";\n$subs" if length($subs);
}
}
else {
$body = $self->deparse($root->first, 0);
}
}
else {
my $sv = $cv->const_sv;
if ($$sv) {
# uh-oh. inlinable sub... format it differently
return $proto . "{ " . $self->const($sv, 0) . " }\n";
} else { # XSUB? (or just a declaration)
return "$proto;\n";
}
}
return $proto ."{\n\t$body\n\b}" ."\n";
}
sub deparse_format {
my $self = shift;
my $form = shift;
my @text;
local($self->{'curcv'}) = $form;
local($self->{'curcvlex'});
local($self->{'in_format'}) = 1;
local(@$self{qw'curstash warnings hints hinthash'})
= @$self{qw'curstash warnings hints hinthash'};
my $op = $form->ROOT;
local $B::overlay = {};
$self->pessimise($op, $form->START);
my $kid;
return "\f." if $op->first->name eq 'stub'
|| $op->first->name eq 'nextstate';
$op = $op->first->first; # skip leavewrite, lineseq
while (not null $op) {
$op = $op->sibling; # skip nextstate
my @exprs;
$kid = $op->first->sibling; # skip pushmark
push @text, "\f".$self->const_sv($kid)->PV;
$kid = $kid->sibling;
for (; not null $kid; $kid = $kid->sibling) {
push @exprs, $self->deparse($kid, -1);
$exprs[-1] =~ s/;\z//;
}
push @text, "\f".join(", ", @exprs)."\n" if @exprs;
$op = $op->sibling;
}
return join("", @text) . "\f.";
}
sub is_scope {
my $op = shift;
return $op->name eq "leave" || $op->name eq "scope"
|| $op->name eq "lineseq"
|| ($op->name eq "null" && class($op) eq "UNOP"
&& (is_scope($op->first) || $op->first->name eq "enter"));
}
sub is_state {
my $name = $_[0]->name;
return $name eq "nextstate" || $name eq "dbstate" || $name eq "setstate";
}
sub is_miniwhile { # check for one-line loop ('foo() while $y--')
my $op = shift;
return (!null($op) and null($op->sibling)
and $op->name eq "null" and class($op) eq "UNOP"
and (($op->first->name =~ /^(and|or)$/
and $op->first->first->sibling->name eq "lineseq")
or ($op->first->name eq "lineseq"
and not null $op->first->first->sibling
and $op->first->first->sibling->name eq "unstack")
));
}
# Check if the op and its sibling are the initialization and the rest of a
# for (..;..;..) { ... } loop
sub is_for_loop {
my $op = shift;
# This OP might be almost anything, though it won't be a
# nextstate. (It's the initialization, so in the canonical case it
# will be an sassign.) The sibling is (old style) a lineseq whose
# first child is a nextstate and whose second is a leaveloop, or
# (new style) an unstack whose sibling is a leaveloop.
my $lseq = $op->sibling;
return 0 unless !is_state($op) and !null($lseq);
if ($lseq->name eq "lineseq") {
if ($lseq->first && !null($lseq->first) && is_state($lseq->first)
&& (my $sib = $lseq->first->sibling)) {
return (!null($sib) && $sib->name eq "leaveloop");
}
} elsif ($lseq->name eq "unstack" && ($lseq->flags & OPf_SPECIAL)) {
my $sib = $lseq->sibling;
return $sib && !null($sib) && $sib->name eq "leaveloop";
}
return 0;
}
sub is_scalar {
my $op = shift;
return ($op->name eq "rv2sv" or
$op->name eq "padsv" or
$op->name eq "gv" or # only in array/hash constructs
$op->flags & OPf_KIDS && !null($op->first)
&& $op->first->name eq "gvsv");
}
sub maybe_parens {
my $self = shift;
my($text, $cx, $prec) = @_;
if ($prec < $cx # unary ops nest just fine
or $prec == $cx and $cx != 4 and $cx != 16 and $cx != 21
or $self->{'parens'})
{
$text = "($text)";
# In a unop, let parent reuse our parens; see maybe_parens_unop
$text = "\cS" . $text if $cx == 16;
return $text;
} else {
return $text;
}
}
# same as above, but get around the 'if it looks like a function' rule
sub maybe_parens_unop {
my $self = shift;
my($name, $kid, $cx) = @_;
if ($cx > 16 or $self->{'parens'}) {
$kid = $self->deparse($kid, 1);
if ($name eq "umask" && $kid =~ /^\d+$/) {
$kid = sprintf("%#o", $kid);
}
return $self->keyword($name) . "($kid)";
} else {
$kid = $self->deparse($kid, 16);
if ($name eq "umask" && $kid =~ /^\d+$/) {
$kid = sprintf("%#o", $kid);
}
$name = $self->keyword($name);
if (substr($kid, 0, 1) eq "\cS") {
# use kid's parens
return $name . substr($kid, 1);
} elsif (substr($kid, 0, 1) eq "(") {
# avoid looks-like-a-function trap with extra parens
# ('+' can lead to ambiguities)
return "$name(" . $kid . ")";
} else {
return "$name $kid";
}
}
}
sub maybe_parens_func {
my $self = shift;
my($func, $text, $cx, $prec) = @_;
if ($prec <= $cx or substr($text, 0, 1) eq "(" or $self->{'parens'}) {
return "$func($text)";
} else {
return "$func $text";
}
}
sub maybe_local {
my $self = shift;
my($op, $cx, $text) = @_;
my $our_intro = ($op->name =~ /^(gv|rv2)[ash]v$/) ? OPpOUR_INTRO : 0;
if ($op->private & (OPpLVAL_INTRO|$our_intro)
and not $self->{'avoid_local'}{$$op}) {
my $our_local = ($op->private & OPpLVAL_INTRO) ? "local" : "our";
if( $our_local eq 'our' ) {
if ( $text !~ /^\W(\w+::)*\w+\z/
and !utf8::decode($text) || $text !~ /^\W(\w+::)*\w+\z/
) {
die "Unexpected our($text)\n";
}
$text =~ s/(\w+::)+//;
}
if (want_scalar($op)) {
return "$our_local $text";
} else {
return $self->maybe_parens_func("$our_local", $text, $cx, 16);
}
} else {
return $text;
}
}
sub maybe_targmy {
my $self = shift;
my($op, $cx, $func, @args) = @_;
if ($op->private & OPpTARGET_MY) {
my $var = $self->padname($op->targ);
my $val = $func->($self, $op, 7, @args);
return $self->maybe_parens("$var = $val", $cx, 7);
} else {
return $func->($self, $op, $cx, @args);
}
}
sub padname_sv {
my $self = shift;
my $targ = shift;
return $self->{'curcv'}->PADLIST->ARRAYelt(0)->ARRAYelt($targ);
}
sub maybe_my {
my $self = shift;
my($op, $cx, $text, $forbid_parens) = @_;
if ($op->private & OPpLVAL_INTRO and not $self->{'avoid_local'}{$$op}) {
my $my = $op->private & OPpPAD_STATE
? $self->keyword("state")
: "my";
if ($forbid_parens || want_scalar($op)) {
return "$my $text";
} else {
return $self->maybe_parens_func($my, $text, $cx, 16);
}
} else {
return $text;
}
}
# The following OPs don't have functions:
# pp_padany -- does not exist after parsing
sub AUTOLOAD {
if ($AUTOLOAD =~ s/^.*::pp_//) {
warn "unexpected OP_".uc $AUTOLOAD;
return "XXX";
} else {
die "Undefined subroutine $AUTOLOAD called";
}
}
sub DESTROY {} # Do not AUTOLOAD
# $root should be the op which represents the root of whatever
# we're sequencing here. If it's undefined, then we don't append
# any subroutine declarations to the deparsed ops, otherwise we
# append appropriate declarations.
sub lineseq {
my($self, $root, $cx, @ops) = @_;
my($expr, @exprs);
my $out_cop = $self->{'curcop'};
my $out_seq = defined($out_cop) ? $out_cop->cop_seq : undef;
my $limit_seq;
if (defined $root) {
$limit_seq = $out_seq;
my $nseq;
$nseq = $self->find_scope_st($root->sibling) if ${$root->sibling};
$limit_seq = $nseq if !defined($limit_seq)
or defined($nseq) && $nseq < $limit_seq;
}
$limit_seq = $self->{'limit_seq'}
if defined($self->{'limit_seq'})
&& (!defined($limit_seq) || $self->{'limit_seq'} < $limit_seq);
local $self->{'limit_seq'} = $limit_seq;
$self->walk_lineseq($root, \@ops,
sub { push @exprs, $_[0]} );
my $sep = $cx ? '; ' : ";\n";
my $body = join($sep, grep {length} @exprs);
my $subs = "";
if (defined $root && defined $limit_seq && !$self->{'in_format'}) {
$subs = join "\n", $self->seq_subs($limit_seq);
}
return join($sep, grep {length} $body, $subs);
}
sub scopeop {
my($real_block, $self, $op, $cx) = @_;
my $kid;
my @kids;
local(@$self{qw'curstash warnings hints hinthash'})
= @$self{qw'curstash warnings hints hinthash'} if $real_block;
if ($real_block) {
$kid = $op->first->sibling; # skip enter
if (is_miniwhile($kid)) {
my $top = $kid->first;
my $name = $top->name;
if ($name eq "and") {
$name = "while";
} elsif ($name eq "or") {
$name = "until";
} else { # no conditional -> while 1 or until 0
return $self->deparse($top->first, 1) . " while 1";
}
my $cond = $top->first;
my $body = $cond->sibling->first; # skip lineseq
$cond = $self->deparse($cond, 1);
$body = $self->deparse($body, 1);
return "$body $name $cond";
}
} else {
$kid = $op->first;
}
for (; !null($kid); $kid = $kid->sibling) {
push @kids, $kid;
}
if ($cx > 0) { # inside an expression, (a do {} while for lineseq)
my $body = $self->lineseq($op, 0, @kids);
return is_lexical_subs(@kids) ? $body : "do {\n\t$body\n\b}";
} else {
my $lineseq = $self->lineseq($op, $cx, @kids);
return (length ($lineseq) ? "$lineseq;" : "");
}
}
sub pp_scope { scopeop(0, @_); }
sub pp_lineseq { scopeop(0, @_); }
sub pp_leave { scopeop(1, @_); }
# This is a special case of scopeop and lineseq, for the case of the
# main_root. The difference is that we print the output statements as
# soon as we get them, for the sake of impatient users.
sub deparse_root {
my $self = shift;
my($op) = @_;
local(@$self{qw'curstash warnings hints hinthash'})
= @$self{qw'curstash warnings hints hinthash'};
my @kids;
return if null $op->first; # Can happen, e.g., for Bytecode without -k
for (my $kid = $op->first->sibling; !null($kid); $kid = $kid->sibling) {
push @kids, $kid;
}
$self->walk_lineseq($op, \@kids,
sub { print $self->indent($_[0].';');
print "\n" unless $_[1] == $#kids;
});
}
sub walk_lineseq {
my ($self, $op, $kids, $callback) = @_;
my @kids = @$kids;
for (my $i = 0; $i < @kids; $i++) {
my $expr = "";
if (is_state $kids[$i]) {
$expr = $self->deparse($kids[$i++], 0);
if ($i > $#kids) {
$callback->($expr, $i);
last;
}
}
if (is_for_loop($kids[$i])) {
$callback->($expr . $self->for_loop($kids[$i], 0),
$i += $kids[$i]->sibling->name eq "unstack" ? 2 : 1);
next;
}
$expr .= $self->deparse($kids[$i], (@kids != 1)/2);
$expr =~ s/;\n?\z//;
$callback->($expr, $i);
}
}
# The BEGIN {} is used here because otherwise this code isn't executed
# when you run B::Deparse on itself.
my %globalnames;
BEGIN { map($globalnames{$_}++, "SIG", "STDIN", "STDOUT", "STDERR", "INC",
"ENV", "ARGV", "ARGVOUT", "_"); }
sub gv_name {
my $self = shift;
my $gv = shift;
my $raw = shift;
Carp::confess() unless ref($gv) eq "B::GV";
my $stash = $gv->STASH->NAME;
my $name = $raw ? $gv->NAME : $gv->SAFENAME;
if ($stash eq 'main' && $name =~ /^::/) {
$stash = '::';
}
elsif (($stash eq 'main'
&& ($globalnames{$name} || $name =~ /^[^A-Za-z_:]/))
or ($stash eq $self->{'curstash'} && !$globalnames{$name}
&& ($stash eq 'main' || $name !~ /::/))
)
{
$stash = "";
} else {
$stash = $stash . "::";
}
if (!$raw and $name =~ /^(\^..|{)/) {
$name = "{$name}"; # ${^WARNING_BITS}, etc and ${
}
return $stash . $name;
}
# Return the name to use for a stash variable.
# If a lexical with the same name is in scope, or
# if strictures are enabled, it may need to be
# fully-qualified.
sub stash_variable {
my ($self, $prefix, $name, $cx) = @_;
return "$prefix$name" if $name =~ /::/;
unless ($prefix eq '$' || $prefix eq '@' || #'
$prefix eq '%' || $prefix eq '$#') {
return "$prefix$name";
}
if ($name =~ /^[^\w+-]$/) {
if (defined $cx && $cx == 26) {
if ($prefix eq '@') {
return "$prefix\{$name}";
}
elsif ($name eq '#') { return '${#}' } # "${#}a" vs "$#a"
}
if ($prefix eq '$#') {
return "\$#{$name}";
}
}
return $prefix . $self->maybe_qualify($prefix, $name);
}
# Return just the name, without the prefix. It may be returned as a quoted
# string. The second return value is a boolean indicating that.
sub stash_variable_name {
my($self, $prefix, $gv) = @_;
my $name = $self->gv_name($gv, 1);
$name = $self->maybe_qualify($prefix,$name);
if ($name =~ /^(?:\S|(?!\d)[\ca-\cz]?(?:\w|::)*|\d+)\z/) {
$name =~ s/^([\ca-\cz])/'^'.($1|'@')/e;
$name =~ /^(\^..|{)/ and $name = "{$name}";
return $name, 0; # not quoted
}
else {
single_delim("q", "'", $name), 1;
}
}
sub maybe_qualify {
my ($self,$prefix,$name) = @_;
my $v = ($prefix eq '$#' ? '@' : $prefix) . $name;
return $name if !$prefix || $name =~ /::/;
return $self->{'curstash'}.'::'. $name
if
$name =~ /^(?!\d)\w/ # alphabetic
&& $v !~ /^\$[ab]\z/ # not $a or $b
&& !$globalnames{$name} # not a global name
&& $self->{hints} & $strict_bits{vars} # strict vars
&& !$self->lex_in_scope($v,1) # no "our"
or $self->lex_in_scope($v); # conflicts with "my" variable
return $name;
}
sub lex_in_scope {
my ($self, $name, $our) = @_;
substr $name, 0, 0, = $our ? 'o' : 'm'; # our/my
$self->populate_curcvlex() if !defined $self->{'curcvlex'};
return 0 if !defined($self->{'curcop'});
my $seq = $self->{'curcop'}->cop_seq;
return 0 if !exists $self->{'curcvlex'}{$name};
for my $a (@{$self->{'curcvlex'}{$name}}) {
my ($st, $en) = @$a;
return 1 if $seq > $st && $seq <= $en;
}
return 0;
}
sub populate_curcvlex {
my $self = shift;
for (my $cv = $self->{'curcv'}; class($cv) eq "CV"; $cv = $cv->OUTSIDE) {
my $padlist = $cv->PADLIST;
# an undef CV still in lexical chain
next if class($padlist) eq "SPECIAL";
my @padlist = $padlist->ARRAY;
my @ns = $padlist[0]->ARRAY;
for (my $i=0; $i<@ns; ++$i) {
next if class($ns[$i]) eq "SPECIAL";
if (class($ns[$i]) eq "PV") {
# Probably that pesky lexical @_
next;
}
my $name = $ns[$i]->PVX;
my ($seq_st, $seq_en) =
($ns[$i]->FLAGS & SVf_FAKE)
? (0, 999999)
: ($ns[$i]->COP_SEQ_RANGE_LOW, $ns[$i]->COP_SEQ_RANGE_HIGH);
push @{$self->{'curcvlex'}{
($ns[$i]->FLAGS & SVpad_OUR ? 'o' : 'm') . $name
}}, [$seq_st, $seq_en];
}
}
}
sub find_scope_st { ((find_scope(@_))[0]); }
sub find_scope_en { ((find_scope(@_))[1]); }
# Recurses down the tree, looking for pad variable introductions and COPs
sub find_scope {
my ($self, $op, $scope_st, $scope_en) = @_;
carp("Undefined op in find_scope") if !defined $op;
return ($scope_st, $scope_en) unless $op->flags & OPf_KIDS;
my @queue = ($op);
while(my $op = shift @queue ) {
for (my $o=$op->first; $$o; $o=$o->sibling) {
if ($o->name =~ /^pad.v$/ && $o->private & OPpLVAL_INTRO) {
my $s = int($self->padname_sv($o->targ)->COP_SEQ_RANGE_LOW);
my $e = $self->padname_sv($o->targ)->COP_SEQ_RANGE_HIGH;
$scope_st = $s if !defined($scope_st) || $s < $scope_st;
$scope_en = $e if !defined($scope_en) || $e > $scope_en;
return ($scope_st, $scope_en);
}
elsif (is_state($o)) {
my $c = $o->cop_seq;
$scope_st = $c if !defined($scope_st) || $c < $scope_st;
$scope_en = $c if !defined($scope_en) || $c > $scope_en;
return ($scope_st, $scope_en);
}
elsif ($o->flags & OPf_KIDS) {
unshift (@queue, $o);
}
}
}
return ($scope_st, $scope_en);
}
# Returns a list of subs which should be inserted before the COP
sub cop_subs {
my ($self, $op, $out_seq) = @_;
my $seq = $op->cop_seq;
# If we have nephews, then our sequence number indicates
# the cop_seq of the end of some sort of scope.
if (class($op->sibling) ne "NULL" && $op->sibling->flags & OPf_KIDS
and my $nseq = $self->find_scope_st($op->sibling) ) {
$seq = $nseq;
}
$seq = $out_seq if defined($out_seq) && $out_seq < $seq;
return $self->seq_subs($seq);
}
sub seq_subs {
my ($self, $seq) = @_;
my @text;
#push @text, "# ($seq)\n";
return "" if !defined $seq;
while (scalar(@{$self->{'subs_todo'}})
and $seq > $self->{'subs_todo'}[0][0]) {
push @text, $self->next_todo;
}
return @text;
}
sub _features_from_bundle {
my ($hints, $hh) = @_;
foreach (@{$feature::feature_bundle{@feature::hint_bundles[$hints >> $feature::hint_shift]}}) {
$hh->{$feature::feature{$_}} = 1;
}
return $hh;
}
# Notice how subs and formats are inserted between statements here;
# also $[ assignments and pragmas.
sub pp_nextstate {
my $self = shift;
my($op, $cx) = @_;
$self->{'curcop'} = $op;
my @text;
push @text, $self->cop_subs($op);
my $stash = $op->stashpv;
if ($stash ne $self->{'curstash'}) {
push @text, "package $stash;\n";
$self->{'curstash'} = $stash;
}
if (OPpCONST_ARYBASE && $self->{'arybase'} != $op->arybase) {
push @text, '$[ = '. $op->arybase .";\n";
$self->{'arybase'} = $op->arybase;
}
my $warnings = $op->warnings;
my $warning_bits;
if ($warnings->isa("B::SPECIAL") && $$warnings == 4) {
$warning_bits = $warnings::Bits{"all"} & WARN_MASK;
}
elsif ($warnings->isa("B::SPECIAL") && $$warnings == 5) {
$warning_bits = $warnings::NONE;
}
elsif ($warnings->isa("B::SPECIAL")) {
$warning_bits = undef;
}
else {
$warning_bits = $warnings->PV & WARN_MASK;
}
if (defined ($warning_bits) and
!defined($self->{warnings}) || $self->{'warnings'} ne $warning_bits) {
push @text, declare_warnings($self->{'warnings'}, $warning_bits);
$self->{'warnings'} = $warning_bits;
}
my $hints = $] < 5.008009 ? $op->private : $op->hints;
my $old_hints = $self->{'hints'};
if ($self->{'hints'} != $hints) {
push @text, declare_hints($self->{'hints'}, $hints);
$self->{'hints'} = $hints;
}
my $newhh;
if ($] > 5.009) {
$newhh = $op->hints_hash->HASH;
}
if ($] >= 5.015006) {
# feature bundle hints
my $from = $old_hints & $feature::hint_mask;
my $to = $ hints & $feature::hint_mask;
if ($from != $to) {
if ($to == $feature::hint_mask) {
if ($self->{'hinthash'}) {
delete $self->{'hinthash'}{$_}
for grep /^feature_/, keys %{$self->{'hinthash'}};
}
else { $self->{'hinthash'} = {} }
$self->{'hinthash'}
= _features_from_bundle($from, $self->{'hinthash'});
}
else {
my $bundle =
$feature::hint_bundles[$to >> $feature::hint_shift];
$bundle =~ s/(\d[13579])\z/$1+1/e; # 5.11 => 5.12
push @text, "no feature;\n",
"use feature ':$bundle';\n";
}
}
}
if ($] > 5.009) {
push @text, declare_hinthash(
$self->{'hinthash'}, $newhh,
$self->{indent_size}, $self->{hints},
);
$self->{'hinthash'} = $newhh;
}
# This should go after of any branches that add statements, to
# increase the chances that it refers to the same line it did in
# the original program.
if ($self->{'linenums'}) {
push @text, "\f#line " . $op->line .
' "' . $op->file, qq'"\n';
}
push @text, $op->label . ": " if $op->label;
return join("", @text);
}
sub declare_warnings {
my ($from, $to) = @_;
if (($to & WARN_MASK) eq (warnings::bits("all") & WARN_MASK)) {
return "use warnings;\n";
}
elsif (($to & WARN_MASK) eq ("\0"x length($to) & WARN_MASK)) {
return "no warnings;\n";
}
return "BEGIN {\${^WARNING_BITS} = ".perlstring($to)."}\n";
}
sub declare_hints {
my ($from, $to) = @_;
my $use = $to & ~$from;
my $no = $from & ~$to;
my $decls = "";
for my $pragma (hint_pragmas($use)) {
$decls .= "use $pragma;\n";
}
for my $pragma (hint_pragmas($no)) {
$decls .= "no $pragma;\n";
}
return $decls;
}
# Internal implementation hints that the core sets automatically, so don't need
# (or want) to be passed back to the user
my %ignored_hints = (
'open<' => 1,
'open>' => 1,
':' => 1,
'strict/refs' => 1,
'strict/subs' => 1,
'strict/vars' => 1,
);
my %rev_feature;
sub declare_hinthash {
my ($from, $to, $indent, $hints) = @_;
my $doing_features =
($hints & $feature::hint_mask) == $feature::hint_mask;
my @decls;
my @features;
my @unfeatures; # bugs?
for my $key (sort keys %$to) {
next if $ignored_hints{$key};
my $is_feature = $key =~ /^feature_/ && $^V ge 5.15.6;
next if $is_feature and not $doing_features;
if (!exists $from->{$key} or $from->{$key} ne $to->{$key}) {
push(@features, $key), next if $is_feature;
push @decls,
qq(\$^H{) . single_delim("q", "'", $key) . qq(} = )
. (
defined $to->{$key}
? single_delim("q", "'", $to->{$key})
: 'undef'
)
. qq(;);
}
}
for my $key (sort keys %$from) {
next if $ignored_hints{$key};
my $is_feature = $key =~ /^feature_/ && $^V ge 5.15.6;
next if $is_feature and not $doing_features;
if (!exists $to->{$key}) {
push(@unfeatures, $key), next if $is_feature;
push @decls, qq(delete \$^H{'$key'};);
}
}
my @ret;
if (@features || @unfeatures) {
if (!%rev_feature) { %rev_feature = reverse %feature::feature }
}
if (@features) {
push @ret, "use feature "
. join(", ", map "'$rev_feature{$_}'", @features) . ";\n";
}
if (@unfeatures) {
push @ret, "no feature "
. join(", ", map "'$rev_feature{$_}'", @unfeatures)
. ";\n";
}
@decls and
push @ret,
join("\n" . (" " x $indent), "BEGIN {", @decls) . "\n}\n";
return @ret;
}
sub hint_pragmas {
my ($bits) = @_;
my (@pragmas, @strict);
push @pragmas, "integer" if $bits & 0x1;
for (sort keys %strict_bits) {
push @strict, "'$_'" if $bits & $strict_bits{$_};
}
if (@strict == keys %strict_bits) {
push @pragmas, "strict";
}
elsif (@strict) {
push @pragmas, "strict " . join ', ', @strict;
}
push @pragmas, "bytes" if $bits & 0x8;
return @pragmas;
}
sub pp_dbstate { pp_nextstate(@_) }
sub pp_setstate { pp_nextstate(@_) }
sub pp_unstack { return "" } # see also leaveloop
my %feature_keywords = (
# keyword => 'feature',
state => 'state',
say => 'say',
given => 'switch',
when => 'switch',
default => 'switch',
break => 'switch',
evalbytes=>'evalbytes',
__SUB__ => '__SUB__',
fc => 'fc',
);
# keywords that are strong and also have a prototype
#
my %strong_proto_keywords = map { $_ => 1 } qw(
pos
prototype
scalar
study
undef
);
sub keyword {
my $self = shift;
my $name = shift;
return $name if $name =~ /^CORE::/; # just in case
if (exists $feature_keywords{$name}) {
my $hh;
my $hints = $self->{hints} & $feature::hint_mask;
if ($hints && $hints != $feature::hint_mask) {
$hh = _features_from_bundle($hints);
}
elsif ($hints) { $hh = $self->{'hinthash'} }
return "CORE::$name"
if !$hh
|| !$hh->{"feature_$feature_keywords{$name}"}
}
if ($strong_proto_keywords{$name}
|| ($name !~ /^(?:chom?p|do|exec|glob|s(?:elect|ystem))\z/
&& !defined eval{prototype "CORE::$name"})
) { return $name }
if (
exists $self->{subs_declared}{$name}
or
exists &{"$self->{curstash}::$name"}
) {
return "CORE::$name"
}
return $name;
}
sub baseop {
my $self = shift;
my($op, $cx, $name) = @_;
return $self->keyword($name);
}
sub pp_stub {
my $self = shift;
my($op, $cx, $name) = @_;
if ($cx >= 1) {
return "()";
}
else {
return "();";
}
}
sub pp_wantarray { baseop(@_, "wantarray") }
sub pp_fork { baseop(@_, "fork") }
sub pp_wait { maybe_targmy(@_, \&baseop, "wait") }
sub pp_getppid { maybe_targmy(@_, \&baseop, "getppid") }
sub pp_time { maybe_targmy(@_, \&baseop, "time") }
sub pp_tms { baseop(@_, "times") }
sub pp_ghostent { baseop(@_, "gethostent") }
sub pp_gnetent { baseop(@_, "getnetent") }
sub pp_gprotoent { baseop(@_, "getprotoent") }
sub pp_gservent { baseop(@_, "getservent") }
sub pp_ehostent { baseop(@_, "endhostent") }
sub pp_enetent { baseop(@_, "endnetent") }
sub pp_eprotoent { baseop(@_, "endprotoent") }
sub pp_eservent { baseop(@_, "endservent") }
sub pp_gpwent { baseop(@_, "getpwent") }
sub pp_spwent { baseop(@_, "setpwent") }
sub pp_epwent { baseop(@_, "endpwent") }
sub pp_ggrent { baseop(@_, "getgrent") }
sub pp_sgrent { baseop(@_, "setgrent") }
sub pp_egrent { baseop(@_, "endgrent") }
sub pp_getlogin { baseop(@_, "getlogin") }
sub POSTFIX () { 1 }
# I couldn't think of a good short name, but this is the category of
# symbolic unary operators with interesting precedence
sub pfixop {
my $self = shift;
my($op, $cx, $name, $prec, $flags) = (@_, 0);
my $kid = $op->first;
$kid = $self->deparse($kid, $prec);
return $self->maybe_parens(($flags & POSTFIX)
? "$kid$name"
# avoid confusion with filetests
: $name eq '-'
&& $kid =~ /^[a-zA-Z](?!\w)/
? "$name($kid)"
: "$name$kid",
$cx, $prec);
}
sub pp_preinc { pfixop(@_, "++", 23) }
sub pp_predec { pfixop(@_, "--", 23) }
sub pp_postinc { maybe_targmy(@_, \&pfixop, "++", 23, POSTFIX) }
sub pp_postdec { maybe_targmy(@_, \&pfixop, "--", 23, POSTFIX) }
sub pp_i_preinc { pfixop(@_, "++", 23) }
sub pp_i_predec { pfixop(@_, "--", 23) }
sub pp_i_postinc { maybe_targmy(@_, \&pfixop, "++", 23, POSTFIX) }
sub pp_i_postdec { maybe_targmy(@_, \&pfixop, "--", 23, POSTFIX) }
sub pp_complement { maybe_targmy(@_, \&pfixop, "~", 21) }
sub pp_negate { maybe_targmy(@_, \&real_negate) }
sub real_negate {
my $self = shift;
my($op, $cx) = @_;
if ($op->first->name =~ /^(i_)?negate$/) {
# avoid --$x
$self->pfixop($op, $cx, "-", 21.5);
} else {
$self->pfixop($op, $cx, "-", 21);
}
}
sub pp_i_negate { pp_negate(@_) }
sub pp_not {
my $self = shift;
my($op, $cx) = @_;
if ($cx <= 4) {
$self->listop($op, $cx, "not", $op->first);
} else {
$self->pfixop($op, $cx, "!", 21);
}
}
sub unop {
my $self = shift;
my($op, $cx, $name, $nollafr) = @_;
my $kid;
if ($op->flags & OPf_KIDS) {
$kid = $op->first;
if (not $name) {
# this deals with 'boolkeys' right now
return $self->deparse($kid,$cx);
}
my $builtinname = $name;
$builtinname =~ /^CORE::/ or $builtinname = "CORE::$name";
if (defined prototype($builtinname)
&& prototype($builtinname) =~ /^;?\*/
&& $kid->name eq "rv2gv") {
$kid = $kid->first;
}
if ($nollafr) {
($kid = $self->deparse($kid, 16)) =~ s/^\cS//;
return $self->maybe_parens(
$self->keyword($name) . " $kid", $cx, 16
);
}
return $self->maybe_parens_unop($name, $kid, $cx);
} else {
return $self->maybe_parens(
$self->keyword($name) . ($op->flags & OPf_SPECIAL ? "()" : ""),
$cx, 16,
);
}
}
sub pp_chop { maybe_targmy(@_, \&unop, "chop") }
sub pp_chomp { maybe_targmy(@_, \&unop, "chomp") }
sub pp_schop { maybe_targmy(@_, \&unop, "chop") }
sub pp_schomp { maybe_targmy(@_, \&unop, "chomp") }
sub pp_defined { unop(@_, "defined") }
sub pp_undef { unop(@_, "undef") }
sub pp_study { unop(@_, "study") }
sub pp_ref { unop(@_, "ref") }
sub pp_pos { maybe_local(@_, unop(@_, "pos")) }
sub pp_sin { maybe_targmy(@_, \&unop, "sin") }
sub pp_cos { maybe_targmy(@_, \&unop, "cos") }
sub pp_rand { maybe_targmy(@_, \&unop, "rand") }
sub pp_srand { unop(@_, "srand") }
sub pp_exp { maybe_targmy(@_, \&unop, "exp") }
sub pp_log { maybe_targmy(@_, \&unop, "log") }
sub pp_sqrt { maybe_targmy(@_, \&unop, "sqrt") }
sub pp_int { maybe_targmy(@_, \&unop, "int") }
sub pp_hex { maybe_targmy(@_, \&unop, "hex") }
sub pp_oct { maybe_targmy(@_, \&unop, "oct") }
sub pp_abs { maybe_targmy(@_, \&unop, "abs") }
sub pp_length { maybe_targmy(@_, \&unop, "length") }
sub pp_ord { maybe_targmy(@_, \&unop, "ord") }
sub pp_chr { maybe_targmy(@_, \&unop, "chr") }
sub pp_each { unop(@_, "each") }
sub pp_values { unop(@_, "values") }
sub pp_keys { unop(@_, "keys") }
{ no strict 'refs'; *{"pp_r$_"} = *{"pp_$_"} for qw< keys each values >; }
sub pp_boolkeys {
# no name because its an optimisation op that has no keyword
unop(@_,"");
}
sub pp_aeach { unop(@_, "each") }
sub pp_avalues { unop(@_, "values") }
sub pp_akeys { unop(@_, "keys") }
sub pp_pop { unop(@_, "pop") }
sub pp_shift { unop(@_, "shift") }
sub pp_caller { unop(@_, "caller") }
sub pp_reset { unop(@_, "reset") }
sub pp_exit { unop(@_, "exit") }
sub pp_prototype { unop(@_, "prototype") }
sub pp_close { unop(@_, "close") }
sub pp_fileno { unop(@_, "fileno") }
sub pp_umask { unop(@_, "umask") }
sub pp_untie { unop(@_, "untie") }
sub pp_tied { unop(@_, "tied") }
sub pp_dbmclose { unop(@_, "dbmclose") }
sub pp_getc { unop(@_, "getc") }
sub pp_eof { unop(@_, "eof") }
sub pp_tell { unop(@_, "tell") }
sub pp_getsockname { unop(@_, "getsockname") }
sub pp_getpeername { unop(@_, "getpeername") }
sub pp_chdir { maybe_targmy(@_, \&unop, "chdir") }
sub pp_chroot { maybe_targmy(@_, \&unop, "chroot") }
sub pp_readlink { unop(@_, "readlink") }
sub pp_rmdir { maybe_targmy(@_, \&unop, "rmdir") }
sub pp_readdir { unop(@_, "readdir") }
sub pp_telldir { unop(@_, "telldir") }
sub pp_rewinddir { unop(@_, "rewinddir") }
sub pp_closedir { unop(@_, "closedir") }
sub pp_getpgrp { maybe_targmy(@_, \&unop, "getpgrp") }
sub pp_localtime { unop(@_, "localtime") }
sub pp_gmtime { unop(@_, "gmtime") }
sub pp_alarm { unop(@_, "alarm") }
sub pp_sleep { maybe_targmy(@_, \&unop, "sleep") }
sub pp_dofile {
my $code = unop(@_, "do", 1); # llafr does not apply
if ($code =~ s/^((?:CORE::)?do) \{/$1({/) { $code .= ')' }
$code;
}
sub pp_entereval {
unop(
@_,
$_[1]->private & OPpEVAL_BYTES ? $_[0]->keyword('evalbytes') : "eval"
)
}
sub pp_ghbyname { unop(@_, "gethostbyname") }
sub pp_gnbyname { unop(@_, "getnetbyname") }
sub pp_gpbyname { unop(@_, "getprotobyname") }
sub pp_shostent { unop(@_, "sethostent") }
sub pp_snetent { unop(@_, "setnetent") }
sub pp_sprotoent { unop(@_, "setprotoent") }
sub pp_sservent { unop(@_, "setservent") }
sub pp_gpwnam { unop(@_, "getpwnam") }
sub pp_gpwuid { unop(@_, "getpwuid") }
sub pp_ggrnam { unop(@_, "getgrnam") }
sub pp_ggrgid { unop(@_, "getgrgid") }
sub pp_lock { unop(@_, "lock") }
sub pp_continue { unop(@_, "continue"); }
sub pp_break { unop(@_, "break"); }
sub givwhen {
my $self = shift;
my($op, $cx, $givwhen) = @_;
my $enterop = $op->first;
my ($head, $block);
if ($enterop->flags & OPf_SPECIAL) {
$head = $self->keyword("default");
$block = $self->deparse($enterop->first, 0);
}
else {
my $cond = $enterop->first;
my $cond_str = $self->deparse($cond, 1);
$head = "$givwhen ($cond_str)";
$block = $self->deparse($cond->sibling, 0);
}
return "$head {\n".
"\t$block\n".
"\b}\cK";
}
sub pp_leavegiven { givwhen(@_, $_[0]->keyword("given")); }
sub pp_leavewhen { givwhen(@_, $_[0]->keyword("when")); }
sub pp_exists {
my $self = shift;
my($op, $cx) = @_;
my $arg;
if ($op->private & OPpEXISTS_SUB) {
# Checking for the existence of a subroutine
return $self->maybe_parens_func("exists",
$self->pp_rv2cv($op->first, 16), $cx, 16);
}
if ($op->flags & OPf_SPECIAL) {
# Array element, not hash element
return $self->maybe_parens_func("exists",
$self->pp_aelem($op->first, 16), $cx, 16);
}
return $self->maybe_parens_func("exists", $self->pp_helem($op->first, 16),
$cx, 16);
}
sub pp_delete {
my $self = shift;
my($op, $cx) = @_;
my $arg;
if ($op->private & OPpSLICE) {
if ($op->flags & OPf_SPECIAL) {
# Deleting from an array, not a hash
return $self->maybe_parens_func("delete",
$self->pp_aslice($op->first, 16),
$cx, 16);
}
return $self->maybe_parens_func("delete",
$self->pp_hslice($op->first, 16),
$cx, 16);
} else {
if ($op->flags & OPf_SPECIAL) {
# Deleting from an array, not a hash
return $self->maybe_parens_func("delete",
$self->pp_aelem($op->first, 16),
$cx, 16);
}
return $self->maybe_parens_func("delete",
$self->pp_helem($op->first, 16),
$cx, 16);
}
}
sub pp_require {
my $self = shift;
my($op, $cx) = @_;
my $opname = $op->flags & OPf_SPECIAL ? 'CORE::require' : 'require';
if (class($op) eq "UNOP" and $op->first->name eq "const"
and $op->first->private & OPpCONST_BARE)
{
my $name = $self->const_sv($op->first)->PV;
$name =~ s[/][::]g;
$name =~ s/\.pm//g;
return $self->maybe_parens("$opname $name", $cx, 16);
} else {
$self->unop(
$op, $cx,
$op->first->name eq 'const'
&& $op->first->private & OPpCONST_NOVER
? "no"
: $opname,
1, # llafr does not apply
);
}
}
sub pp_scalar {
my $self = shift;
my($op, $cx) = @_;
my $kid = $op->first;
if (not null $kid->sibling) {
# XXX Was a here-doc
return $self->dquote($op);
}
$self->unop(@_, "scalar");
}
sub padval {
my $self = shift;
my $targ = shift;
return $self->{'curcv'}->PADLIST->ARRAYelt(1)->ARRAYelt($targ);
}
sub anon_hash_or_list {
my $self = shift;
my($op, $cx) = @_;
my($pre, $post) = @{{"anonlist" => ["[","]"],
"anonhash" => ["{","}"]}->{$op->name}};
my($expr, @exprs);
$op = $op->first->sibling; # skip pushmark
for (; !null($op); $op = $op->sibling) {
$expr = $self->deparse($op, 6);
push @exprs, $expr;
}
if ($pre eq "{" and $cx < 1) {
# Disambiguate that it's not a block
$pre = "+{";
}
return $pre . join(", ", @exprs) . $post;
}
sub pp_anonlist {
my $self = shift;
my ($op, $cx) = @_;
if ($op->flags & OPf_SPECIAL) {
return $self->anon_hash_or_list($op, $cx);
}
warn "Unexpected op pp_" . $op->name() . " without OPf_SPECIAL";
return 'XXX';
}
*pp_anonhash = \&pp_anonlist;
sub pp_refgen {
my $self = shift;
my($op, $cx) = @_;
my $kid = $op->first;
if ($kid->name eq "null") {
$kid = $kid->first;
if (!null($kid->sibling) and
$kid->sibling->name eq "anoncode") {
return $self->e_anoncode({ code => $self->padval($kid->sibling->targ) });
} elsif ($kid->name eq "pushmark") {
my $sib_name = $kid->sibling->name;
if ($sib_name =~ /^(pad|rv2)[ah]v$/
and not $kid->sibling->flags & OPf_REF)
{
# The @a in \(@a) isn't in ref context, but only when the
# parens are there.
return "\\(" . $self->pp_list($op->first) . ")";
} elsif ($sib_name eq 'entersub') {
my $text = $self->deparse($kid->sibling, 1);
# Always show parens for \(&func()), but only with -p otherwise
$text = "($text)" if $self->{'parens'}
or $kid->sibling->private & OPpENTERSUB_AMPER;
return "\\$text";
}
}
}
$self->pfixop($op, $cx, "\\", 20);
}
sub e_anoncode {
my ($self, $info) = @_;
my $text = $self->deparse_sub($info->{code});
return "sub " . $text;
}
sub pp_srefgen { pp_refgen(@_) }
sub pp_readline {
my $self = shift;
my($op, $cx) = @_;
my $kid = $op->first;
$kid = $kid->first if $kid->name eq "rv2gv"; # <$fh>
return "<" . $self->deparse($kid, 1) . ">" if is_scalar($kid);
return $self->unop($op, $cx, "readline");
}
sub pp_rcatline {
my $self = shift;
my($op) = @_;
return "<" . $self->gv_name($self->gv_or_padgv($op)) . ">";
}
# Unary operators that can occur as pseudo-listops inside double quotes
sub dq_unop {
my $self = shift;
my($op, $cx, $name, $prec, $flags) = (@_, 0, 0);
my $kid;
if ($op->flags & OPf_KIDS) {
$kid = $op->first;
# If there's more than one kid, the first is an ex-pushmark.
$kid = $kid->sibling if not null $kid->sibling;
return $self->maybe_parens_unop($name, $kid, $cx);
} else {
return $name . ($op->flags & OPf_SPECIAL ? "()" : "");
}
}
sub pp_ucfirst { dq_unop(@_, "ucfirst") }
sub pp_lcfirst { dq_unop(@_, "lcfirst") }
sub pp_uc { dq_unop(@_, "uc") }
sub pp_lc { dq_unop(@_, "lc") }
sub pp_quotemeta { maybe_targmy(@_, \&dq_unop, "quotemeta") }
sub pp_fc { dq_unop(@_, "fc") }
sub loopex {
my $self = shift;
my ($op, $cx, $name) = @_;
if (class($op) eq "PVOP") {
$name .= " " . $op->pv;
} elsif (class($op) eq "OP") {
# no-op
} elsif (class($op) eq "UNOP") {
(my $kid = $self->deparse($op->first, 7)) =~ s/^\cS//;
$name .= " $kid";
}
return $self->maybe_parens($name, $cx, 7);
}
sub pp_last { loopex(@_, "last") }
sub pp_next { loopex(@_, "next") }
sub pp_redo { loopex(@_, "redo") }
sub pp_goto { loopex(@_, "goto") }
sub pp_dump { loopex(@_, "CORE::dump") }
sub ftst {
my $self = shift;
my($op, $cx, $name) = @_;
if (class($op) eq "UNOP") {
# Genuine '-X' filetests are exempt from the LLAFR, but not
# l?stat()
if ($name =~ /^-/) {
(my $kid = $self->deparse($op->first, 16)) =~ s/^\cS//;
return $self->maybe_parens("$name $kid", $cx, 16);
}
return $self->maybe_parens_unop($name, $op->first, $cx);
} elsif (class($op) =~ /^(SV|PAD)OP$/) {
return $self->maybe_parens_func($name, $self->pp_gv($op, 1), $cx, 16);
} else { # I don't think baseop filetests ever survive ck_ftst, but...
return $name;
}
}
sub pp_lstat { ftst(@_, "lstat") }
sub pp_stat { ftst(@_, "stat") }
sub pp_ftrread { ftst(@_, "-R") }
sub pp_ftrwrite { ftst(@_, "-W") }
sub pp_ftrexec { ftst(@_, "-X") }
sub pp_fteread { ftst(@_, "-r") }
sub pp_ftewrite { ftst(@_, "-w") }
sub pp_fteexec { ftst(@_, "-x") }
sub pp_ftis { ftst(@_, "-e") }
sub pp_fteowned { ftst(@_, "-O") }
sub pp_ftrowned { ftst(@_, "-o") }
sub pp_ftzero { ftst(@_, "-z") }
sub pp_ftsize { ftst(@_, "-s") }
sub pp_ftmtime { ftst(@_, "-M") }
sub pp_ftatime { ftst(@_, "-A") }
sub pp_ftctime { ftst(@_, "-C") }
sub pp_ftsock { ftst(@_, "-S") }
sub pp_ftchr { ftst(@_, "-c") }
sub pp_ftblk { ftst(@_, "-b") }
sub pp_ftfile { ftst(@_, "-f") }
sub pp_ftdir { ftst(@_, "-d") }
sub pp_ftpipe { ftst(@_, "-p") }
sub pp_ftlink { ftst(@_, "-l") }
sub pp_ftsuid { ftst(@_, "-u") }
sub pp_ftsgid { ftst(@_, "-g") }
sub pp_ftsvtx { ftst(@_, "-k") }
sub pp_fttty { ftst(@_, "-t") }
sub pp_fttext { ftst(@_, "-T") }
sub pp_ftbinary { ftst(@_, "-B") }
sub SWAP_CHILDREN () { 1 }
sub ASSIGN () { 2 } # has OP= variant
sub LIST_CONTEXT () { 4 } # Assignment is in list context
my(%left, %right);
sub assoc_class {
my $op = shift;
my $name = $op->name;
if ($name eq "concat" and $op->first->name eq "concat") {
# avoid spurious '=' -- see comment in pp_concat
return "concat";
}
if ($name eq "null" and class($op) eq "UNOP"
and $op->first->name =~ /^(and|x?or)$/
and null $op->first->sibling)
{
# Like all conditional constructs, OP_ANDs and OP_ORs are topped
# with a null that's used as the common end point of the two
# flows of control. For precedence purposes, ignore it.
# (COND_EXPRs have these too, but we don't bother with
# their associativity).
return assoc_class($op->first);
}
return $name . ($op->flags & OPf_STACKED ? "=" : "");
}
# Left associative operators, like '+', for which
# $a + $b + $c is equivalent to ($a + $b) + $c
BEGIN {
%left = ('multiply' => 19, 'i_multiply' => 19,
'divide' => 19, 'i_divide' => 19,
'modulo' => 19, 'i_modulo' => 19,
'repeat' => 19,
'add' => 18, 'i_add' => 18,
'subtract' => 18, 'i_subtract' => 18,
'concat' => 18,
'left_shift' => 17, 'right_shift' => 17,
'bit_and' => 13,
'bit_or' => 12, 'bit_xor' => 12,
'and' => 3,
'or' => 2, 'xor' => 2,
);
}
sub deparse_binop_left {
my $self = shift;
my($op, $left, $prec) = @_;
if ($left{assoc_class($op)} && $left{assoc_class($left)}
and $left{assoc_class($op)} == $left{assoc_class($left)})
{
return $self->deparse($left, $prec - .00001);
} else {
return $self->deparse($left, $prec);
}
}
# Right associative operators, like '=', for which
# $a = $b = $c is equivalent to $a = ($b = $c)
BEGIN {
%right = ('pow' => 22,
'sassign=' => 7, 'aassign=' => 7,
'multiply=' => 7, 'i_multiply=' => 7,
'divide=' => 7, 'i_divide=' => 7,
'modulo=' => 7, 'i_modulo=' => 7,
'repeat=' => 7,
'add=' => 7, 'i_add=' => 7,
'subtract=' => 7, 'i_subtract=' => 7,
'concat=' => 7,
'left_shift=' => 7, 'right_shift=' => 7,
'bit_and=' => 7,
'bit_or=' => 7, 'bit_xor=' => 7,
'andassign' => 7,
'orassign' => 7,
);
}
sub deparse_binop_right {
my $self = shift;
my($op, $right, $prec) = @_;
if ($right{assoc_class($op)} && $right{assoc_class($right)}
and $right{assoc_class($op)} == $right{assoc_class($right)})
{
return $self->deparse($right, $prec - .00001);
} else {
return $self->deparse($right, $prec);
}
}
sub binop {
my $self = shift;
my ($op, $cx, $opname, $prec, $flags) = (@_, 0);
my $left = $op->first;
my $right = $op->last;
my $eq = "";
if ($op->flags & OPf_STACKED && $flags & ASSIGN) {
$eq = "=";
$prec = 7;
}
if ($flags & SWAP_CHILDREN) {
($left, $right) = ($right, $left);
}
$left = $self->deparse_binop_left($op, $left, $prec);
$left = "($left)" if $flags & LIST_CONTEXT
&& $left !~ /^(my|our|local|)[\@\(]/;
$right = $self->deparse_binop_right($op, $right, $prec);
return $self->maybe_parens("$left $opname$eq $right", $cx, $prec);
}
sub pp_add { maybe_targmy(@_, \&binop, "+", 18, ASSIGN) }
sub pp_multiply { maybe_targmy(@_, \&binop, "*", 19, ASSIGN) }
sub pp_subtract { maybe_targmy(@_, \&binop, "-",18, ASSIGN) }
sub pp_divide { maybe_targmy(@_, \&binop, "/", 19, ASSIGN) }
sub pp_modulo { maybe_targmy(@_, \&binop, "%", 19, ASSIGN) }
sub pp_i_add { maybe_targmy(@_, \&binop, "+", 18, ASSIGN) }
sub pp_i_multiply { maybe_targmy(@_, \&binop, "*", 19, ASSIGN) }
sub pp_i_subtract { maybe_targmy(@_, \&binop, "-", 18, ASSIGN) }
sub pp_i_divide { maybe_targmy(@_, \&binop, "/", 19, ASSIGN) }
sub pp_i_modulo { maybe_targmy(@_, \&binop, "%", 19, ASSIGN) }
sub pp_pow { maybe_targmy(@_, \&binop, "**", 22, ASSIGN) }
sub pp_left_shift { maybe_targmy(@_, \&binop, "<<", 17, ASSIGN) }
sub pp_right_shift { maybe_targmy(@_, \&binop, ">>", 17, ASSIGN) }
sub pp_bit_and { maybe_targmy(@_, \&binop, "&", 13, ASSIGN) }
sub pp_bit_or { maybe_targmy(@_, \&binop, "|", 12, ASSIGN) }
sub pp_bit_xor { maybe_targmy(@_, \&binop, "^", 12, ASSIGN) }
sub pp_eq { binop(@_, "==", 14) }
sub pp_ne { binop(@_, "!=", 14) }
sub pp_lt { binop(@_, "<", 15) }
sub pp_gt { binop(@_, ">", 15) }
sub pp_ge { binop(@_, ">=", 15) }
sub pp_le { binop(@_, "<=", 15) }
sub pp_ncmp { binop(@_, "<=>", 14) }
sub pp_i_eq { binop(@_, "==", 14) }
sub pp_i_ne { binop(@_, "!=", 14) }
sub pp_i_lt { binop(@_, "<", 15) }
sub pp_i_gt { binop(@_, ">", 15) }
sub pp_i_ge { binop(@_, ">=", 15) }
sub pp_i_le { binop(@_, "<=", 15) }
sub pp_i_ncmp { binop(@_, "<=>", 14) }
sub pp_seq { binop(@_, "eq", 14) }
sub pp_sne { binop(@_, "ne", 14) }
sub pp_slt { binop(@_, "lt", 15) }
sub pp_sgt { binop(@_, "gt", 15) }
sub pp_sge { binop(@_, "ge", 15) }
sub pp_sle { binop(@_, "le", 15) }
sub pp_scmp { binop(@_, "cmp", 14) }
sub pp_sassign { binop(@_, "=", 7, SWAP_CHILDREN) }
sub pp_aassign { binop(@_, "=", 7, SWAP_CHILDREN | LIST_CONTEXT) }
sub pp_smartmatch {
my ($self, $op, $cx) = @_;
if ($op->flags & OPf_SPECIAL) {
return $self->deparse($op->last, $cx);
}
else {
binop(@_, "~~", 14);
}
}
# '.' is special because concats-of-concats are optimized to save copying
# by making all but the first concat stacked. The effect is as if the
# programmer had written '($a . $b) .= $c', except legal.
sub pp_concat { maybe_targmy(@_, \&real_concat) }
sub real_concat {
my $self = shift;
my($op, $cx) = @_;
my $left = $op->first;
my $right = $op->last;
my $eq = "";
my $prec = 18;
if ($op->flags & OPf_STACKED and $op->first->name ne "concat") {
$eq = "=";
$prec = 7;
}
$left = $self->deparse_binop_left($op, $left, $prec);
$right = $self->deparse_binop_right($op, $right, $prec);
return $self->maybe_parens("$left .$eq $right", $cx, $prec);
}
# 'x' is weird when the left arg is a list
sub pp_repeat {
my $self = shift;
my($op, $cx) = @_;
my $left = $op->first;
my $right = $op->last;
my $eq = "";
my $prec = 19;
if ($op->flags & OPf_STACKED) {
$eq = "=";
$prec = 7;
}
if (null($right)) { # list repeat; count is inside left-side ex-list
my $kid = $left->first->sibling; # skip pushmark
my @exprs;
for (; !null($kid->sibling); $kid = $kid->sibling) {
push @exprs, $self->deparse($kid, 6);
}
$right = $kid;
$left = "(" . join(", ", @exprs). ")";
} else {
$left = $self->deparse_binop_left($op, $left, $prec);
}
$right = $self->deparse_binop_right($op, $right, $prec);
return $self->maybe_parens("$left x$eq $right", $cx, $prec);
}
sub range {
my $self = shift;
my ($op, $cx, $type) = @_;
my $left = $op->first;
my $right = $left->sibling;
$left = $self->deparse($left, 9);
$right = $self->deparse($right, 9);
return $self->maybe_parens("$left $type $right", $cx, 9);
}
sub pp_flop {
my $self = shift;
my($op, $cx) = @_;
my $flip = $op->first;
my $type = ($flip->flags & OPf_SPECIAL) ? "..." : "..";
return $self->range($flip->first, $cx, $type);
}
# one-line while/until is handled in pp_leave
sub logop {
my $self = shift;
my ($op, $cx, $lowop, $lowprec, $highop, $highprec, $blockname) = @_;
my $left = $op->first;
my $right = $op->first->sibling;
if ($cx < 1 and is_scope($right) and $blockname
and $self->{'expand'} < 7)
{ # if ($a) {$b}
$left = $self->deparse($left, 1);
$right = $self->deparse($right, 0);
return "$blockname ($left) {\n\t$right\n\b}\cK";
} elsif ($cx < 1 and $blockname and not $self->{'parens'}
and $self->{'expand'} < 7) { # $b if $a
$right = $self->deparse($right, 1);
$left = $self->deparse($left, 1);
return "$right $blockname $left";
} elsif ($cx > $lowprec and $highop) { # $a && $b
$left = $self->deparse_binop_left($op, $left, $highprec);
$right = $self->deparse_binop_right($op, $right, $highprec);
return $self->maybe_parens("$left $highop $right", $cx, $highprec);
} else { # $a and $b
$left = $self->deparse_binop_left($op, $left, $lowprec);
$right = $self->deparse_binop_right($op, $right, $lowprec);
return $self->maybe_parens("$left $lowop $right", $cx, $lowprec);
}
}
sub pp_and { logop(@_, "and", 3, "&&", 11, "if") }
sub pp_or { logop(@_, "or", 2, "||", 10, "unless") }
sub pp_dor { logop(@_, "//", 10) }
# xor is syntactically a logop, but it's really a binop (contrary to
# old versions of opcode.pl). Syntax is what matters here.
sub pp_xor { logop(@_, "xor", 2, "", 0, "") }
sub logassignop {
my $self = shift;
my ($op, $cx, $opname) = @_;
my $left = $op->first;
my $right = $op->first->sibling->first; # skip sassign
$left = $self->deparse($left, 7);
$right = $self->deparse($right, 7);
return $self->maybe_parens("$left $opname $right", $cx, 7);
}
sub pp_andassign { logassignop(@_, "&&=") }
sub pp_orassign { logassignop(@_, "||=") }
sub pp_dorassign { logassignop(@_, "//=") }
sub rv2gv_or_string {
my($self,$op) = @_;
if ($op->name eq "gv") { # could be open("open") or open("###")
my($name,$quoted) =
$self->stash_variable_name("", $self->gv_or_padgv($op));
$quoted ? $name : "*$name";
}
else {
$self->deparse($op, 6);
}
}
sub listop {
my $self = shift;
my($op, $cx, $name, $kid, $nollafr) = @_;
my(@exprs);
my $parens = ($cx >= 5) || $self->{'parens'};
$kid ||= $op->first->sibling;
# If there are no arguments, add final parentheses (or parenthesize the
# whole thing if the llafr does not apply) to account for cases like
# (return)+1 or setpgrp()+1. When the llafr does not apply, we use a
# precedence of 6 (< comma), as "return, 1" does not need parentheses.
if (null $kid) {
return $nollafr
? $self->maybe_parens($self->keyword($name), $cx, 7)
: $self->keyword($name) . '()' x (7 < $cx);
}
my $first;
my $fullname = $self->keyword($name);
my $proto = prototype("CORE::$name");
if (
( (defined $proto && $proto =~ /^;?\*/)
|| $name eq 'select' # select(F) doesn't have a proto
)
&& $kid->name eq "rv2gv"
&& !($kid->private & OPpLVAL_INTRO)
) {
$first = $self->rv2gv_or_string($kid->first);
}
else {
$first = $self->deparse($kid, 6);
}
if ($name eq "chmod" && $first =~ /^\d+$/) {
$first = sprintf("%#o", $first);
}
$first = "+$first"
if not $parens and not $nollafr and substr($first, 0, 1) eq "(";
push @exprs, $first;
$kid = $kid->sibling;
if (defined $proto && $proto =~ /^\*\*/ && $kid->name eq "rv2gv"
&& !($kid->private & OPpLVAL_INTRO)) {
push @exprs, $first = $self->rv2gv_or_string($kid->first);
$kid = $kid->sibling;
}
for (; !null($kid); $kid = $kid->sibling) {
push @exprs, $self->deparse($kid, 6);
}
if ($name eq "reverse" && ($op->private & OPpREVERSE_INPLACE)) {
return "$exprs[0] = $fullname"
. ($parens ? "($exprs[0])" : " $exprs[0]");
}
if ($name =~ /^(system|exec)$/
&& ($op->flags & OPf_STACKED)
&& @exprs > 1)
{
# handle the "system prog a1,a2,.." form
my $prog = shift @exprs;
$exprs[0] = "$prog $exprs[0]";
}
if ($parens && $nollafr) {
return "($fullname " . join(", ", @exprs) . ")";
} elsif ($parens) {
return "$fullname(" . join(", ", @exprs) . ")";
} else {
return "$fullname " . join(", ", @exprs);
}
}
sub pp_bless { listop(@_, "bless") }
sub pp_atan2 { maybe_targmy(@_, \&listop, "atan2") }
sub pp_substr {
my ($self,$op,$cx) = @_;
if ($op->private & OPpSUBSTR_REPL_FIRST) {
return
listop($self, $op, 7, "substr", $op->first->sibling->sibling)
. " = "
. $self->deparse($op->first->sibling, 7);
}
maybe_local(@_, listop(@_, "substr"))
}
sub pp_vec { maybe_local(@_, listop(@_, "vec")) }
sub pp_index { maybe_targmy(@_, \&listop, "index") }
sub pp_rindex { maybe_targmy(@_, \&listop, "rindex") }
sub pp_sprintf { maybe_targmy(@_, \&listop, "sprintf") }
sub pp_formline { listop(@_, "formline") } # see also deparse_format
sub pp_crypt { maybe_targmy(@_, \&listop, "crypt") }
sub pp_unpack { listop(@_, "unpack") }
sub pp_pack { listop(@_, "pack") }
sub pp_join { maybe_targmy(@_, \&listop, "join") }
sub pp_splice { listop(@_, "splice") }
sub pp_push { maybe_targmy(@_, \&listop, "push") }
sub pp_unshift { maybe_targmy(@_, \&listop, "unshift") }
sub pp_reverse { listop(@_, "reverse") }
sub pp_warn { listop(@_, "warn") }
sub pp_die { listop(@_, "die") }
sub pp_return { listop(@_, "return", undef, 1) } # llafr does not apply
sub pp_open { listop(@_, "open") }
sub pp_pipe_op { listop(@_, "pipe") }
sub pp_tie { listop(@_, "tie") }
sub pp_binmode { listop(@_, "binmode") }
sub pp_dbmopen { listop(@_, "dbmopen") }
sub pp_sselect { listop(@_, "select") }
sub pp_select { listop(@_, "select") }
sub pp_read { listop(@_, "read") }
sub pp_sysopen { listop(@_, "sysopen") }
sub pp_sysseek { listop(@_, "sysseek") }
sub pp_sysread { listop(@_, "sysread") }
sub pp_syswrite { listop(@_, "syswrite") }
sub pp_send { listop(@_, "send") }
sub pp_recv { listop(@_, "recv") }
sub pp_seek { listop(@_, "seek") }
sub pp_fcntl { listop(@_, "fcntl") }
sub pp_ioctl { listop(@_, "ioctl") }
sub pp_flock { maybe_targmy(@_, \&listop, "flock") }
sub pp_socket { listop(@_, "socket") }
sub pp_sockpair { listop(@_, "socketpair") }
sub pp_bind { listop(@_, "bind") }
sub pp_connect { listop(@_, "connect") }
sub pp_listen { listop(@_, "listen") }
sub pp_accept { listop(@_, "accept") }
sub pp_shutdown { listop(@_, "shutdown") }
sub pp_gsockopt { listop(@_, "getsockopt") }
sub pp_ssockopt { listop(@_, "setsockopt") }
sub pp_chown { maybe_targmy(@_, \&listop, "chown") }
sub pp_unlink { maybe_targmy(@_, \&listop, "unlink") }
sub pp_chmod { maybe_targmy(@_, \&listop, "chmod") }
sub pp_utime { maybe_targmy(@_, \&listop, "utime") }
sub pp_rename { maybe_targmy(@_, \&listop, "rename") }
sub pp_link { maybe_targmy(@_, \&listop, "link") }
sub pp_symlink { maybe_targmy(@_, \&listop, "symlink") }
sub pp_mkdir { maybe_targmy(@_, \&listop, "mkdir") }
sub pp_open_dir { listop(@_, "opendir") }
sub pp_seekdir { listop(@_, "seekdir") }
sub pp_waitpid { maybe_targmy(@_, \&listop, "waitpid") }
sub pp_system { maybe_targmy(@_, \&listop, "system") }
sub pp_exec { maybe_targmy(@_, \&listop, "exec") }
sub pp_kill { maybe_targmy(@_, \&listop, "kill") }
sub pp_setpgrp { maybe_targmy(@_, \&listop, "setpgrp") }
sub pp_getpriority { maybe_targmy(@_, \&listop, "getpriority") }
sub pp_setpriority { maybe_targmy(@_, \&listop, "setpriority") }
sub pp_shmget { listop(@_, "shmget") }
sub pp_shmctl { listop(@_, "shmctl") }
sub pp_shmread { listop(@_, "shmread") }
sub pp_shmwrite { listop(@_, "shmwrite") }
sub pp_msgget { listop(@_, "msgget") }
sub pp_msgctl { listop(@_, "msgctl") }
sub pp_msgsnd { listop(@_, "msgsnd") }
sub pp_msgrcv { listop(@_, "msgrcv") }
sub pp_semget { listop(@_, "semget") }
sub pp_semctl { listop(@_, "semctl") }
sub pp_semop { listop(@_, "semop") }
sub pp_ghbyaddr { listop(@_, "gethostbyaddr") }
sub pp_gnbyaddr { listop(@_, "getnetbyaddr") }
sub pp_gpbynumber { listop(@_, "getprotobynumber") }
sub pp_gsbyname { listop(@_, "getservbyname") }
sub pp_gsbyport { listop(@_, "getservbyport") }
sub pp_syscall { listop(@_, "syscall") }
sub pp_glob {
my $self = shift;
my($op, $cx) = @_;
my $kid = $op->first->sibling; # skip pushmark
my $keyword =
$op->flags & OPf_SPECIAL ? 'glob' : $self->keyword('glob');
my $text;
if ($keyword =~ /^CORE::/
or $kid->name ne 'const'
or ($text = $self->dq($kid))
=~ /^\$?(\w|::|\`)+$/ # could look like a readline
or $text =~ /[<>]/) {
$text = $self->deparse($kid);
return $cx >= 5 || $self->{'parens'}
? "$keyword($text)"
: "$keyword $text";
} else {
return '<' . $text . '>';
}
}
# Truncate is special because OPf_SPECIAL makes a bareword first arg
# be a filehandle. This could probably be better fixed in the core
# by moving the GV lookup into ck_truc.
sub pp_truncate {
my $self = shift;
my($op, $cx) = @_;
my(@exprs);
my $parens = ($cx >= 5) || $self->{'parens'};
my $kid = $op->first->sibling;
my $fh;
if ($op->flags & OPf_SPECIAL) {
# $kid is an OP_CONST
$fh = $self->const_sv($kid)->PV;
} else {
$fh = $self->deparse($kid, 6);
$fh = "+$fh" if not $parens and substr($fh, 0, 1) eq "(";
}
my $len = $self->deparse($kid->sibling, 6);
my $name = $self->keyword('truncate');
if ($parens) {
return "$name($fh, $len)";
} else {
return "$name $fh, $len";
}
}
sub indirop {
my $self = shift;
my($op, $cx, $name) = @_;
my($expr, @exprs);
my $firstkid = my $kid = $op->first->sibling;
my $indir = "";
if ($op->flags & OPf_STACKED) {
$indir = $kid;
$indir = $indir->first; # skip rv2gv
if (is_scope($indir)) {
$indir = "{" . $self->deparse($indir, 0) . "}";
$indir = "{;}" if $indir eq "{}";
} elsif ($indir->name eq "const" && $indir->private & OPpCONST_BARE) {
$indir = $self->const_sv($indir)->PV;
} else {
$indir = $self->deparse($indir, 24);
}
$indir = $indir . " ";
$kid = $kid->sibling;
}
if ($name eq "sort" && $op->private & (OPpSORT_NUMERIC | OPpSORT_INTEGER)) {
$indir = ($op->private & OPpSORT_DESCEND) ? '{$b <=> $a} '
: '{$a <=> $b} ';
}
elsif ($name eq "sort" && $op->private & OPpSORT_DESCEND) {
$indir = '{$b cmp $a} ';
}
for (; !null($kid); $kid = $kid->sibling) {
$expr = $self->deparse($kid, !$indir && $kid == $firstkid && $name eq "sort" && $firstkid->name eq "entersub" ? 16 : 6);
push @exprs, $expr;
}
my $name2;
if ($name eq "sort" && $op->private & OPpSORT_REVERSE) {
$name2 = $self->keyword('reverse') . ' ' . $self->keyword('sort');
}
else { $name2 = $self->keyword($name) }
if ($name eq "sort" && ($op->private & OPpSORT_INPLACE)) {
return "$exprs[0] = $name2 $indir $exprs[0]";
}
my $args = $indir . join(", ", @exprs);
if ($indir ne "" && $name eq "sort") {
# We don't want to say "sort(f 1, 2, 3)", since perl -w will
# give bareword warnings in that case. Therefore if context
# requires, we'll put parens around the outside "(sort f 1, 2,
# 3)". Unfortunately, we'll currently think the parens are
# necessary more often that they really are, because we don't
# distinguish which side of an assignment we're on.
if ($cx >= 5) {
return "($name2 $args)";
} else {
return "$name2 $args";
}
} elsif (
!$indir && $name eq "sort"
&& !null($op->first->sibling)
&& $op->first->sibling->name eq 'entersub'
) {
# We cannot say sort foo(bar), as foo will be interpreted as a
# comparison routine. We have to say sort(...) in that case.
return "$name2($args)";
} else {
return $self->maybe_parens_func($name2, $args, $cx, 5);
}
}
sub pp_prtf { indirop(@_, "printf") }
sub pp_print { indirop(@_, "print") }
sub pp_say { indirop(@_, "say") }
sub pp_sort { indirop(@_, "sort") }
sub mapop {
my $self = shift;
my($op, $cx, $name) = @_;
my($expr, @exprs);
my $kid = $op->first; # this is the (map|grep)start
$kid = $kid->first->sibling; # skip a pushmark
my $code = $kid->first; # skip a null
if (is_scope $code) {
$code = "{" . $self->deparse($code, 0) . "} ";
} else {
$code = $self->deparse($code, 24);
$code .= ", " if !null($kid->sibling);
}
$kid = $kid->sibling;
for (; !null($kid); $kid = $kid->sibling) {
$expr = $self->deparse($kid, 6);
push @exprs, $expr if defined $expr;
}
return $self->maybe_parens_func($name, $code . join(", ", @exprs), $cx, 5);
}
sub pp_mapwhile { mapop(@_, "map") }
sub pp_grepwhile { mapop(@_, "grep") }
sub pp_mapstart { baseop(@_, "map") }
sub pp_grepstart { baseop(@_, "grep") }
sub pp_list {
my $self = shift;
my($op, $cx) = @_;
my($expr, @exprs);
my $kid = $op->first->sibling; # skip pushmark
return '' if class($kid) eq 'NULL';
my $lop;
my $local = "either"; # could be local(...), my(...), state(...) or our(...)
for ($lop = $kid; !null($lop); $lop = $lop->sibling) {
# This assumes that no other private flags equal 128, and that
# OPs that store things other than flags in their op_private,
# like OP_AELEMFAST, won't be immediate children of a list.
#
# OP_ENTERSUB and OP_SPLIT can break this logic, so check for them.
# I suspect that open and exit can too.
# XXX This really needs to be rewritten to accept only those ops
# known to take the OPpLVAL_INTRO flag.
if (!($lop->private & (OPpLVAL_INTRO|OPpOUR_INTRO)
or $lop->name eq "undef")
or $lop->name =~ /^(?:entersub|exit|open|split)\z/)
{
$local = ""; # or not
last;
}
if ($lop->name =~ /^pad[ash]v$/) {
if ($lop->private & OPpPAD_STATE) { # state()
($local = "", last) if $local =~ /^(?:local|our|my)$/;
$local = "state";
} else { # my()
($local = "", last) if $local =~ /^(?:local|our|state)$/;
$local = "my";
}
} elsif ($lop->name =~ /^(gv|rv2)[ash]v$/
&& $lop->private & OPpOUR_INTRO
or $lop->name eq "null" && $lop->first->name eq "gvsv"
&& $lop->first->private & OPpOUR_INTRO) { # our()
($local = "", last) if $local =~ /^(?:my|local|state)$/;
$local = "our";
} elsif ($lop->name ne "undef"
# specifically avoid the "reverse sort" optimisation,
# where "reverse" is nullified
&& !($lop->name eq 'sort' && ($lop->flags & OPpSORT_REVERSE)))
{
# local()
($local = "", last) if $local =~ /^(?:my|our|state)$/;
$local = "local";
}
}
$local = "" if $local eq "either"; # no point if it's all undefs
return $self->deparse($kid, $cx) if null $kid->sibling and not $local;
for (; !null($kid); $kid = $kid->sibling) {
if ($local) {
if (class($kid) eq "UNOP" and $kid->first->name eq "gvsv") {
$lop = $kid->first;
} else {
$lop = $kid;
}
$self->{'avoid_local'}{$$lop}++;
$expr = $self->deparse($kid, 6);
delete $self->{'avoid_local'}{$$lop};
} else {
$expr = $self->deparse($kid, 6);
}
push @exprs, $expr;
}
if ($local) {
return "$local(" . join(", ", @exprs) . ")";
} else {
return $self->maybe_parens( join(", ", @exprs), $cx, 6);
}
}
sub is_ifelse_cont {
my $op = shift;
return ($op->name eq "null" and class($op) eq "UNOP"
and $op->first->name =~ /^(and|cond_expr)$/
and is_scope($op->first->first->sibling));
}
sub pp_cond_expr {
my $self = shift;
my($op, $cx) = @_;
my $cond = $op->first;
my $true = $cond->sibling;
my $false = $true->sibling;
my $cuddle = $self->{'cuddle'};
unless ($cx < 1 and (is_scope($true) and $true->name ne "null") and
(is_scope($false) || is_ifelse_cont($false))
and $self->{'expand'} < 7) {
$cond = $self->deparse($cond, 8);
$true = $self->deparse($true, 6);
$false = $self->deparse($false, 8);
return $self->maybe_parens("$cond ? $true : $false", $cx, 8);
}
$cond = $self->deparse($cond, 1);
$true = $self->deparse($true, 0);
my $head = "if ($cond) {\n\t$true\n\b}";
my @elsifs;
while (!null($false) and is_ifelse_cont($false)) {
my $newop = $false->first;
my $newcond = $newop->first;
my $newtrue = $newcond->sibling;
$false = $newtrue->sibling; # last in chain is OP_AND => no else
if ($newcond->name eq "lineseq")
{
# lineseq to ensure correct line numbers in elsif()
# Bug #37302 fixed by change #33710.
$newcond = $newcond->first->sibling;
}
$newcond = $self->deparse($newcond, 1);
$newtrue = $self->deparse($newtrue, 0);
push @elsifs, "elsif ($newcond) {\n\t$newtrue\n\b}";
}
if (!null($false)) {
$false = $cuddle . "else {\n\t" .
$self->deparse($false, 0) . "\n\b}\cK";
} else {
$false = "\cK";
}
return $head . join($cuddle, "", @elsifs) . $false;
}
sub pp_once {
my ($self, $op, $cx) = @_;
my $cond = $op->first;
my $true = $cond->sibling;
return $self->deparse($true, $cx);
}
sub loop_common {
my $self = shift;
my($op, $cx, $init) = @_;
my $enter = $op->first;
my $kid = $enter->sibling;
local(@$self{qw'curstash warnings hints hinthash'})
= @$self{qw'curstash warnings hints hinthash'};
my $head = "";
my $bare = 0;
my $body;
my $cond = undef;
if ($kid->name eq "lineseq") { # bare or infinite loop
if ($kid->last->name eq "unstack") { # infinite
$head = "while (1) "; # Can't use for(;;) if there's a continue
$cond = "";
} else {
$bare = 1;
}
$body = $kid;
} elsif ($enter->name eq "enteriter") { # foreach
my $ary = $enter->first->sibling; # first was pushmark
my $var = $ary->sibling;
if ($ary->name eq 'null' and $enter->private & OPpITER_REVERSED) {
# "reverse" was optimised away
$ary = listop($self, $ary->first->sibling, 1, 'reverse');
} elsif ($enter->flags & OPf_STACKED
and not null $ary->first->sibling->sibling)
{
$ary = $self->deparse($ary->first->sibling, 9) . " .. " .
$self->deparse($ary->first->sibling->sibling, 9);
} else {
$ary = $self->deparse($ary, 1);
}
if (null $var) {
if (($enter->flags & OPf_SPECIAL) && ($] < 5.009)) {
# thread special var, under 5005threads
$var = $self->pp_threadsv($enter, 1);
} else { # regular my() variable
$var = $self->pp_padsv($enter, 1, 1);
}
} elsif ($var->name eq "rv2gv") {
$var = $self->pp_rv2sv($var, 1);
if ($enter->private & OPpOUR_INTRO) {
# our declarations don't have package names
$var =~ s/^(.).*::/$1/;
$var = "our $var";
}
} elsif ($var->name eq "gv") {
$var = "\$" . $self->deparse($var, 1);
}
$body = $kid->first->first->sibling; # skip OP_AND and OP_ITER
if (!is_state $body->first and $body->first->name !~ /^(?:stub|leave|scope)$/) {
confess unless $var eq '$_';
$body = $body->first;
return $self->deparse($body, 2) . " foreach ($ary)";
}
$head = "foreach $var ($ary) ";
} elsif ($kid->name eq "null") { # while/until
$kid = $kid->first;
my $name = {"and" => "while", "or" => "until"}->{$kid->name};
$cond = $self->deparse($kid->first, 1);
$head = "$name ($cond) ";
$body = $kid->first->sibling;
} elsif ($kid->name eq "stub") { # bare and empty
return "{;}"; # {} could be a hashref
}
# If there isn't a continue block, then the next pointer for the loop
# will point to the unstack, which is kid's last child, except
# in a bare loop, when it will point to the leaveloop. When neither of
# these conditions hold, then the second-to-last child is the continue
# block (or the last in a bare loop).
my $cont_start = $enter->nextop;
my $cont;
if ($$cont_start != $$op && ${$cont_start} != ${$body->last}) {
if ($bare) {
$cont = $body->last;
} else {
$cont = $body->first;
while (!null($cont->sibling->sibling)) {
$cont = $cont->sibling;
}
}
my $state = $body->first;
my $cuddle = $self->{'cuddle'};
my @states;
for (; $$state != $$cont; $state = $state->sibling) {
push @states, $state;
}
$body = $self->lineseq(undef, 0, @states);
if (defined $cond and not is_scope $cont and $self->{'expand'} < 3) {
$head = "for ($init; $cond; " . $self->deparse($cont, 1) .") ";
$cont = "\cK";
} else {
$cont = $cuddle . "continue {\n\t" .
$self->deparse($cont, 0) . "\n\b}\cK";
}
} else {
return "" if !defined $body;
if (length $init) {
$head = "for ($init; $cond;) ";
}
$cont = "\cK";
$body = $self->deparse($body, 0);
}
$body =~ s/;?$/;\n/;
return $head . "{\n\t" . $body . "\b}" . $cont;
}
sub pp_leaveloop { shift->loop_common(@_, "") }
sub for_loop {
my $self = shift;
my($op, $cx) = @_;
my $init = $self->deparse($op, 1);
my $s = $op->sibling;
my $ll = $s->name eq "unstack" ? $s->sibling : $s->first->sibling;
return $self->loop_common($ll, $cx, $init);
}
sub pp_leavetry {
my $self = shift;
return "eval {\n\t" . $self->pp_leave(@_) . "\n\b}";
}
sub _op_is_or_was {
my ($op, $expect_type) = @_;
my $type = $op->type;
return($type == $expect_type
|| ($type == OP_NULL && $op->targ == $expect_type));
}
sub pp_null {
my $self = shift;
my($op, $cx) = @_;
if (class($op) eq "OP") {
# old value is lost
return $self->{'ex_const'} if $op->targ == OP_CONST;
} elsif ($op->first->name eq 'pushmark'
or $op->first->name eq 'null'
&& $op->first->targ == OP_PUSHMARK
&& _op_is_or_was($op, OP_LIST)) {
return $self->pp_list($op, $cx);
} elsif ($op->first->name eq "enter") {
return $self->pp_leave($op, $cx);
} elsif ($op->first->name eq "leave") {
return $self->pp_leave($op->first, $cx);
} elsif ($op->first->name eq "scope") {
return $self->pp_scope($op->first, $cx);
} elsif ($op->targ == OP_STRINGIFY) {
return $self->dquote($op, $cx);
} elsif ($op->targ == OP_GLOB) {
return $self->pp_glob(
$op->first # entersub
->first # ex-list
->first # pushmark
->sibling, # glob
$cx
);
} elsif (!null($op->first->sibling) and
$op->first->sibling->name eq "readline" and
$op->first->sibling->flags & OPf_STACKED) {
return $self->maybe_parens($self->deparse($op->first, 7) . " = "
. $self->deparse($op->first->sibling, 7),
$cx, 7);
} elsif (!null($op->first->sibling) and
$op->first->sibling->name eq "trans" and
$op->first->sibling->flags & OPf_STACKED) {
return $self->maybe_parens($self->deparse($op->first, 20) . " =~ "
. $self->deparse($op->first->sibling, 20),
$cx, 20);
} elsif ($op->flags & OPf_SPECIAL && $cx < 1 && !$op->targ) {
return "do {\n\t". $self->deparse($op->first, $cx) ."\n\b};";
} elsif (!null($op->first->sibling) and
$op->first->sibling->name eq "null" and
class($op->first->sibling) eq "UNOP" and
$op->first->sibling->first->flags & OPf_STACKED and
$op->first->sibling->first->name eq "rcatline") {
return $self->maybe_parens($self->deparse($op->first, 18) . " .= "
. $self->deparse($op->first->sibling, 18),
$cx, 18);
} else {
return $self->deparse($op->first, $cx);
}
}
sub padname {
my $self = shift;
my $targ = shift;
return $self->padname_sv($targ)->PVX;
}
sub padany {
my $self = shift;
my $op = shift;
return substr($self->padname($op->targ), 1); # skip $/@/%
}
sub pp_padsv {
my $self = shift;
my($op, $cx, $forbid_parens) = @_;
return $self->maybe_my($op, $cx, $self->padname($op->targ),
$forbid_parens);
}
sub pp_padav { pp_padsv(@_) }
sub pp_padhv { pp_padsv(@_) }
my @threadsv_names = B::threadsv_names;
sub pp_threadsv {
my $self = shift;
my($op, $cx) = @_;
return $self->maybe_local($op, $cx, "\$" . $threadsv_names[$op->targ]);
}
sub gv_or_padgv {
my $self = shift;
my $op = shift;
if (class($op) eq "PADOP") {
return $self->padval($op->padix);
} else { # class($op) eq "SVOP"
return $op->gv;
}
}
sub pp_gvsv {
my $self = shift;
my($op, $cx) = @_;
my $gv = $self->gv_or_padgv($op);
return $self->maybe_local($op, $cx, $self->stash_variable("\$",
$self->gv_name($gv), $cx));
}
sub pp_gv {
my $self = shift;
my($op, $cx) = @_;
my $gv = $self->gv_or_padgv($op);
return $self->gv_name($gv);
}
sub pp_aelemfast_lex {
my $self = shift;
my($op, $cx) = @_;
my $name = $self->padname($op->targ);
$name =~ s/^@/\$/;
my $i = $op->private;
$i -= 256 if $i > 127;
return $name . "[" . ($i + $self->{'arybase'}) . "]";
}
sub pp_aelemfast {
my $self = shift;
my($op, $cx) = @_;
# optimised PADAV, pre 5.15
return $self->pp_aelemfast_lex(@_) if ($op->flags & OPf_SPECIAL);
my $gv = $self->gv_or_padgv($op);
my($name,$quoted) = $self->stash_variable_name('@',$gv);
$name = $quoted ? "$name->" : '$' . $name;
my $i = $op->private;
$i -= 256 if $i > 127;
return $name . "[" . ($i + $self->{'arybase'}) . "]";
}
sub rv2x {
my $self = shift;
my($op, $cx, $type) = @_;
if (class($op) eq 'NULL' || !$op->can("first")) {
carp("Unexpected op in pp_rv2x");
return 'XXX';
}
my $kid = $op->first;
if ($kid->name eq "gv") {
return $self->stash_variable($type, $self->deparse($kid, 0), $cx);
} elsif (is_scalar $kid) {
my $str = $self->deparse($kid, 0);
if ($str =~ /^\$([^\w\d])\z/) {
# "$$+" isn't a legal way to write the scalar dereference
# of $+, since the lexer can't tell you aren't trying to
# do something like "$$ + 1" to get one more than your
# PID. Either "${$+}" or "$${+}" are workable
# disambiguations, but if the programmer did the former,
# they'd be in the "else" clause below rather than here.
# It's not clear if this should somehow be unified with
# the code in dq and re_dq that also adds lexer
# disambiguation braces.
$str = '$' . "{$1}"; #'
}
return $type . $str;
} else {
return $type . "{" . $self->deparse($kid, 0) . "}";
}
}
sub pp_rv2sv { maybe_local(@_, rv2x(@_, "\$")) }
sub pp_rv2hv { maybe_local(@_, rv2x(@_, "%")) }
sub pp_rv2gv { maybe_local(@_, rv2x(@_, "*")) }
# skip rv2av
sub pp_av2arylen {
my $self = shift;
my($op, $cx) = @_;
if ($op->first->name eq "padav") {
return $self->maybe_local($op, $cx, '$#' . $self->padany($op->first));
} else {
return $self->maybe_local($op, $cx,
$self->rv2x($op->first, $cx, '$#'));
}
}
# skip down to the old, ex-rv2cv
sub pp_rv2cv {
my ($self, $op, $cx) = @_;
if (!null($op->first) && $op->first->name eq 'null' &&
$op->first->targ == OP_LIST)
{
return $self->rv2x($op->first->first->sibling, $cx, "&")
}
else {
return $self->rv2x($op, $cx, "")
}
}
sub list_const {
my $self = shift;
my($cx, @list) = @_;
my @a = map $self->const($_, 6), @list;
if (@a == 0) {
return "()";
} elsif (@a == 1) {
return $a[0];
} elsif ( @a > 2 and !grep(!/^-?\d+$/, @a)) {
# collapse (-1,0,1,2) into (-1..2)
my ($s, $e) = @a[0,-1];
my $i = $s;
return $self->maybe_parens("$s..$e", $cx, 9)
unless grep $i++ != $_, @a;
}
return $self->maybe_parens(join(", ", @a), $cx, 6);
}
sub pp_rv2av {
my $self = shift;
my($op, $cx) = @_;
my $kid = $op->first;
if ($kid->name eq "const") { # constant list
my $av = $self->const_sv($kid);
return $self->list_const($cx, $av->ARRAY);
} else {
return $self->maybe_local($op, $cx, $self->rv2x($op, $cx, "\@"));
}
}
sub is_subscriptable {
my $op = shift;
if ($op->name =~ /^[ahg]elem/) {
return 1;
} elsif ($op->name eq "entersub") {
my $kid = $op->first;
return 0 unless null $kid->sibling;
$kid = $kid->first;
$kid = $kid->sibling until null $kid->sibling;
return 0 if is_scope($kid);
$kid = $kid->first;
return 0 if $kid->name eq "gv" || $kid->name eq "padcv";
return 0 if is_scalar($kid);
return is_subscriptable($kid);
} else {
return 0;
}
}
sub elem_or_slice_array_name
{
my $self = shift;
my ($array, $left, $padname, $allow_arrow) = @_;
if ($array->name eq $padname) {
return $self->padany($array);
} elsif (is_scope($array)) { # ${expr}[0]
return "{" . $self->deparse($array, 0) . "}";
} elsif ($array->name eq "gv") {
($array, my $quoted) =
$self->stash_variable_name(
$left eq '[' ? '@' : '%', $self->gv_or_padgv($array)
);
if (!$allow_arrow && $quoted) {
# This cannot happen.
die "Invalid variable name $array for slice";
}
return $quoted ? "$array->" : $array;
} elsif (!$allow_arrow || is_scalar $array) { # $x[0], $$x[0], ...
return $self->deparse($array, 24);
} else {
return undef;
}
}
sub elem_or_slice_single_index
{
my $self = shift;
my ($idx) = @_;
$idx = $self->deparse($idx, 1);
# Outer parens in an array index will confuse perl
# if we're interpolating in a regular expression, i.e.
# /$x$foo[(-1)]/ is *not* the same as /$x$foo[-1]/
#
# If $self->{parens}, then an initial '(' will
# definitely be paired with a final ')'. If
# !$self->{parens}, the misleading parens won't
# have been added in the first place.
#
# [You might think that we could get "(...)...(...)"
# where the initial and final parens do not match
# each other. But we can't, because the above would
# only happen if there's an infix binop between the
# two pairs of parens, and *that* means that the whole
# expression would be parenthesized as well.]
#
$idx =~ s/^\((.*)\)$/$1/ if $self->{'parens'};
# Hash-element braces will autoquote a bareword inside themselves.
# We need to make sure that C<$hash{warn()}> doesn't come out as
# C<$hash{warn}>, which has a quite different meaning. Currently
# B::Deparse will always quote strings, even if the string was a
# bareword in the original (i.e. the OPpCONST_BARE flag is ignored
# for constant strings.) So we can cheat slightly here - if we see
# a bareword, we know that it is supposed to be a function call.
#
$idx =~ s/^([A-Za-z_]\w*)$/$1()/;
return $idx;
}
sub elem {
my $self = shift;
my ($op, $cx, $left, $right, $padname) = @_;
my($array, $idx) = ($op->first, $op->first->sibling);
$idx = $self->elem_or_slice_single_index($idx);
unless ($array->name eq $padname) { # Maybe this has been fixed
$array = $array->first; # skip rv2av (or ex-rv2av in _53+)
}
if (my $array_name=$self->elem_or_slice_array_name
($array, $left, $padname, 1)) {
return ($array_name =~ /->\z/
? $array_name
: $array_name eq '#' ? '${#}' : "\$" . $array_name)
. $left . $idx . $right;
} else {
# $x[20][3]{hi} or expr->[20]
my $arrow = is_subscriptable($array) ? "" : "->";
return $self->deparse($array, 24) . $arrow . $left . $idx . $right;
}
}
sub pp_aelem { maybe_local(@_, elem(@_, "[", "]", "padav")) }
sub pp_helem { maybe_local(@_, elem(@_, "{", "}", "padhv")) }
sub pp_gelem {
my $self = shift;
my($op, $cx) = @_;
my($glob, $part) = ($op->first, $op->last);
$glob = $glob->first; # skip rv2gv
$glob = $glob->first if $glob->name eq "rv2gv"; # this one's a bug
my $scope = is_scope($glob);
$glob = $self->deparse($glob, 0);
$part = $self->deparse($part, 1);
return "*" . ($scope ? "{$glob}" : $glob) . "{$part}";
}
sub slice {
my $self = shift;
my ($op, $cx, $left, $right, $regname, $padname) = @_;
my $last;
my(@elems, $kid, $array, $list);
if (class($op) eq "LISTOP") {
$last = $op->last;
} else { # ex-hslice inside delete()
for ($kid = $op->first; !null $kid->sibling; $kid = $kid->sibling) {}
$last = $kid;
}
$array = $last;
$array = $array->first
if $array->name eq $regname or $array->name eq "null";
$array = $self->elem_or_slice_array_name($array,$left,$padname,0);
$kid = $op->first->sibling; # skip pushmark
if ($kid->name eq "list") {
$kid = $kid->first->sibling; # skip list, pushmark
for (; !null $kid; $kid = $kid->sibling) {
push @elems, $self->deparse($kid, 6);
}
$list = join(", ", @elems);
} else {
$list = $self->elem_or_slice_single_index($kid);
}
my $lead = '@';
$lead = '%' if $op->name =~ /^kv/i;
return $lead . $array . $left . $list . $right;
}
sub pp_aslice { maybe_local(@_, slice(@_, "[", "]", "rv2av", "padav")) }
sub pp_kvaslice { slice(@_, "[", "]", "rv2av", "padav") }
sub pp_hslice { maybe_local(@_, slice(@_, "{", "}", "rv2hv", "padhv")) }
sub pp_kvhslice { slice(@_, "{", "}", "rv2hv", "padhv") }
sub pp_lslice {
my $self = shift;
my($op, $cx) = @_;
my $idx = $op->first;
my $list = $op->last;
my(@elems, $kid);
$list = $self->deparse($list, 1);
$idx = $self->deparse($idx, 1);
return "($list)" . "[$idx]";
}
sub want_scalar {
my $op = shift;
return ($op->flags & OPf_WANT) == OPf_WANT_SCALAR;
}
sub want_list {
my $op = shift;
return ($op->flags & OPf_WANT) == OPf_WANT_LIST;
}
sub _method {
my $self = shift;
my($op, $cx) = @_;
my $kid = $op->first->sibling; # skip pushmark
my($meth, $obj, @exprs);
if ($kid->name eq "list" and want_list $kid) {
# When an indirect object isn't a bareword but the args are in
# parens, the parens aren't part of the method syntax (the LLAFR
# doesn't apply), but they make a list with OPf_PARENS set that
# doesn't get flattened by the append_elem that adds the method,
# making a (object, arg1, arg2, ...) list where the object
# usually is. This can be distinguished from
# '($obj, $arg1, $arg2)->meth()' (which is legal if $arg2 is an
# object) because in the later the list is in scalar context
# as the left side of -> always is, while in the former
# the list is in list context as method arguments always are.
# (Good thing there aren't method prototypes!)
$meth = $kid->sibling;
$kid = $kid->first->sibling; # skip pushmark
$obj = $kid;
$kid = $kid->sibling;
for (; not null $kid; $kid = $kid->sibling) {
push @exprs, $kid;
}
} else {
$obj = $kid;
$kid = $kid->sibling;
for (; !null ($kid->sibling) && $kid->name!~/^method(?:_named)?\z/;
$kid = $kid->sibling) {
push @exprs, $kid
}
$meth = $kid;
}
if ($meth->name eq "method_named") {
$meth = $self->const_sv($meth)->PV;
} else {
$meth = $meth->first;
if ($meth->name eq "const") {
# As of 5.005_58, this case is probably obsoleted by the
# method_named case above
$meth = $self->const_sv($meth)->PV; # needs to be bare
}
}
return { method => $meth, variable_method => ref($meth),
object => $obj, args => \@exprs },
$cx;
}
# compat function only
sub method {
my $self = shift;
my $info = $self->_method(@_);
return $self->e_method( $self->_method(@_) );
}
sub e_method {
my ($self, $info, $cx) = @_;
my $obj = $self->deparse($info->{object}, 24);
my $meth = $info->{method};
$meth = $self->deparse($meth, 1) if $info->{variable_method};
my $args = join(", ", map { $self->deparse($_, 6) } @{$info->{args}} );
if ($info->{object}->name eq 'scope' && want_list $info->{object}) {
# method { $object }
# This must be deparsed this way to preserve list context
# of $object.
my $need_paren = $cx >= 6;
return '(' x $need_paren
. $meth . substr($obj,2) # chop off the "do"
. " $args"
. ')' x $need_paren;
}
my $kid = $obj . "->" . $meth;
if (length $args) {
return $kid . "(" . $args . ")"; # parens mandatory
} else {
return $kid;
}
}
# returns "&" if the prototype doesn't match the args,
# or ("", $args_after_prototype_demunging) if it does.
sub check_proto {
my $self = shift;
return "&" if $self->{'noproto'};
my($proto, @args) = @_;
my($arg, $real);
my $doneok = 0;
my @reals;
# An unbackslashed @ or % gobbles up the rest of the args
1 while $proto =~ s/(?<!\\)([@%])[^\]]+$/$1/;
$proto =~ s/^\s*//;
while ($proto) {
$proto =~ s/^(\\?[\$\@&%*_]|\\\[[\$\@&%*]+\]|;)\s*//;
my $chr = $1;
if ($chr eq "") {
return "&" if @args;
} elsif ($chr eq ";") {
$doneok = 1;
} elsif ($chr eq "@" or $chr eq "%") {
push @reals, map($self->deparse($_, 6), @args);
@args = ();
} else {
$arg = shift @args;
last unless $arg;
if ($chr eq "\$" || $chr eq "_") {
if (want_scalar $arg) {
push @reals, $self->deparse($arg, 6);
} else {
return "&";
}
} elsif ($chr eq "&") {
if ($arg->name =~ /^(s?refgen|undef)$/) {
push @reals, $self->deparse($arg, 6);
} else {
return "&";
}
} elsif ($chr eq "*") {
if ($arg->name =~ /^s?refgen$/
and $arg->first->first->name eq "rv2gv")
{
$real = $arg->first->first; # skip refgen, null
if ($real->first->name eq "gv") {
push @reals, $self->deparse($real, 6);
} else {
push @reals, $self->deparse($real->first, 6);
}
} else {
return "&";
}
} elsif (substr($chr, 0, 1) eq "\\") {
$chr =~ tr/\\[]//d;
if ($arg->name =~ /^s?refgen$/ and
!null($real = $arg->first) and
($chr =~ /\$/ && is_scalar($real->first)
or ($chr =~ /@/
&& class($real->first->sibling) ne 'NULL'
&& $real->first->sibling->name
=~ /^(rv2|pad)av$/)
or ($chr =~ /%/
&& class($real->first->sibling) ne 'NULL'
&& $real->first->sibling->name
=~ /^(rv2|pad)hv$/)
#or ($chr =~ /&/ # This doesn't work
# && $real->first->name eq "rv2cv")
or ($chr =~ /\*/
&& $real->first->name eq "rv2gv")))
{
push @reals, $self->deparse($real, 6);
} else {
return "&";
}
}
}
}
return "&" if $proto and !$doneok; # too few args and no ';'
return "&" if @args; # too many args
return ("", join ", ", @reals);
}
sub pp_entersub {
my $self = shift;
my($op, $cx) = @_;
return $self->e_method($self->_method($op, $cx))
unless null $op->first->sibling;
my $prefix = "";
my $amper = "";
my($kid, @exprs);
if ($op->flags & OPf_SPECIAL && !($op->flags & OPf_MOD)) {
$prefix = "do ";
} elsif ($op->private & OPpENTERSUB_AMPER) {
$amper = "&";
}
$kid = $op->first;
$kid = $kid->first->sibling; # skip ex-list, pushmark
for (; not null $kid->sibling; $kid = $kid->sibling) {
push @exprs, $kid;
}
my $simple = 0;
my $proto = undef;
if (is_scope($kid)) {
$amper = "&";
$kid = "{" . $self->deparse($kid, 0) . "}";
} elsif ($kid->first->name eq "gv") {
my $gv = $self->gv_or_padgv($kid->first);
if (class($gv->CV) ne "SPECIAL") {
$proto = $gv->CV->PV if $gv->CV->FLAGS & SVf_POK;
}
$simple = 1; # only calls of named functions can be prototyped
$kid = $self->deparse($kid, 24);
if (!$amper) {
if ($kid eq 'main::') {
$kid = '::';
} elsif ($kid !~ /^(?:\w|::)(?:[\w\d]|::(?!\z))*\z/) {
$kid = single_delim("q", "'", $kid) . '->';
}
}
} elsif (is_scalar ($kid->first) && $kid->first->name ne 'rv2cv') {
$amper = "&";
$kid = $self->deparse($kid, 24);
} else {
$prefix = "";
my $arrow = is_subscriptable($kid->first) || $kid->first->name eq "padcv" ? "" : "->";
$kid = $self->deparse($kid, 24) . $arrow;
}
# Doesn't matter how many prototypes there are, if
# they haven't happened yet!
my $declared;
{
no strict 'refs';
no warnings 'uninitialized';
$declared = exists $self->{'subs_declared'}{$kid}
|| (
defined &{ ${$self->{'curstash'}."::"}{$kid} }
&& !exists
$self->{'subs_deparsed'}{$self->{'curstash'}."::".$kid}
&& defined prototype $self->{'curstash'}."::".$kid
);
if (!$declared && defined($proto)) {
# Avoid "too early to check prototype" warning
($amper, $proto) = ('&');
}
}
my $args;
if ($declared and defined $proto and not $amper) {
($amper, $args) = $self->check_proto($proto, @exprs);
if ($amper eq "&") {
$args = join(", ", map($self->deparse($_, 6), @exprs));
}
} else {
$args = join(", ", map($self->deparse($_, 6), @exprs));
}
if ($prefix or $amper) {
if ($kid eq '&') { $kid = "{$kid}" } # &{&} cannot be written as &&
if ($op->flags & OPf_STACKED) {
return $prefix . $amper . $kid . "(" . $args . ")";
} else {
return $prefix . $amper. $kid;
}
} else {
# It's a syntax error to call CORE::GLOBAL::foo with a prefix,
# so it must have been translated from a keyword call. Translate
# it back.
$kid =~ s/^CORE::GLOBAL:://;
my $dproto = defined($proto) ? $proto : "undefined";
if (!$declared) {
return "$kid(" . $args . ")";
} elsif ($dproto =~ /^\s*\z/) {
return $kid;
} elsif ($dproto eq "\$" and is_scalar($exprs[0])) {
# is_scalar is an excessively conservative test here:
# really, we should be comparing to the precedence of the
# top operator of $exprs[0] (ala unop()), but that would
# take some major code restructuring to do right.
return $self->maybe_parens_func($kid, $args, $cx, 16);
} elsif ($dproto ne '$' and defined($proto) || $simple) { #'
return $self->maybe_parens_func($kid, $args, $cx, 5);
} else {
return "$kid(" . $args . ")";
}
}
}
sub pp_enterwrite { unop(@_, "write") }
# escape things that cause interpolation in double quotes,
# but not character escapes
sub uninterp {
my($str) = @_;
$str =~ s/(^|\G|[^\\])((?:\\\\)*)([\$\@]|\\[uUlLQE])/$1$2\\$3/g;
return $str;
}
{
my $bal;
BEGIN {
use re "eval";
# Matches any string which is balanced with respect to {braces}
$bal = qr(
(?:
[^\\{}]
| \\\\
| \\[{}]
| \{(??{$bal})\}
)*
)x;
}
# the same, but treat $|, $), $( and $ at the end of the string differently
sub re_uninterp {
my($str) = @_;
$str =~ s/
( ^|\G # $1
| [^\\]
)
( # $2
(?:\\\\)*
)
( # $3
(\(\?\??\{$bal\}\)) # $4
| [\$\@]
(?!\||\)|\(|$)
| \\[uUlLQE]
)
/defined($4) && length($4) ? "$1$2$4" : "$1$2\\$3"/xeg;
return $str;
}
# This is for regular expressions with the /x modifier
# We have to leave comments unmangled.
sub re_uninterp_extended {
my($str) = @_;
$str =~ s/
( ^|\G # $1
| [^\\]
)
( # $2
(?:\\\\)*
)
( # $3
( \(\?\??\{$bal\}\) # $4 (skip over (?{}) and (??{}) blocks)
| \#[^\n]* # (skip over comments)
)
| [\$\@]
(?!\||\)|\(|$|\s)
| \\[uUlLQE]
)
/defined($4) && length($4) ? "$1$2$4" : "$1$2\\$3"/xeg;
return $str;
}
}
my %unctrl = # portable to EBCDIC
(
"\c@" => '\c@', # unused
"\cA" => '\cA',
"\cB" => '\cB',
"\cC" => '\cC',
"\cD" => '\cD',
"\cE" => '\cE',
"\cF" => '\cF',
"\cG" => '\cG',
"\cH" => '\cH',
"\cI" => '\cI',
"\cJ" => '\cJ',
"\cK" => '\cK',
"\cL" => '\cL',
"\cM" => '\cM',
"\cN" => '\cN',
"\cO" => '\cO',
"\cP" => '\cP',
"\cQ" => '\cQ',
"\cR" => '\cR',
"\cS" => '\cS',
"\cT" => '\cT',
"\cU" => '\cU',
"\cV" => '\cV',
"\cW" => '\cW',
"\cX" => '\cX',
"\cY" => '\cY',
"\cZ" => '\cZ',
"\c[" => '\c[', # unused
"\c\\" => '\c\\', # unused
"\c]" => '\c]', # unused
"\c_" => '\c_', # unused
);
# character escapes, but not delimiters that might need to be escaped
sub escape_str { # ASCII, UTF8
my($str) = @_;
$str =~ s/(.)/ord($1) > 255 ? sprintf("\\x{%x}", ord($1)) : $1/eg;
$str =~ s/\a/\\a/g;
# $str =~ s/\cH/\\b/g; # \b means something different in a regex
$str =~ s/\t/\\t/g;
$str =~ s/\n/\\n/g;
$str =~ s/\e/\\e/g;
$str =~ s/\f/\\f/g;
$str =~ s/\r/\\r/g;
$str =~ s/([\cA-\cZ])/$unctrl{$1}/ge;
$str =~ s/([[:^print:]])/sprintf("\\%03o", ord($1))/ge;
return $str;
}
# For regexes with the /x modifier.
# Leave whitespace unmangled.
sub escape_extended_re {
my($str) = @_;
$str =~ s/(.)/ord($1) > 255 ? sprintf("\\x{%x}", ord($1)) : $1/eg;
$str =~ s/([[:^print:]])/
($1 =~ y! \t\n!!) ? $1 : sprintf("\\%03o", ord($1))/ge;
$str =~ s/\n/\n\f/g;
return $str;
}
# Don't do this for regexen
sub unback {
my($str) = @_;
$str =~ s/\\/\\\\/g;
return $str;
}
# Remove backslashes which precede literal control characters,
# to avoid creating ambiguity when we escape the latter.
sub re_unback {
my($str) = @_;
# the insane complexity here is due to the behaviour of "\c\"
$str =~ s/(^|[^\\]|\\c\\)(?<!\\c)\\(\\\\)*(?=[[:^print:]])/$1$2/g;
return $str;
}
sub balanced_delim {
my($str) = @_;
my @str = split //, $str;
my($ar, $open, $close, $fail, $c, $cnt, $last_bs);
for $ar (['[',']'], ['(',')'], ['<','>'], ['{','}']) {
($open, $close) = @$ar;
$fail = 0; $cnt = 0; $last_bs = 0;
for $c (@str) {
if ($c eq $open) {
$fail = 1 if $last_bs;
$cnt++;
} elsif ($c eq $close) {
$fail = 1 if $last_bs;
$cnt--;
if ($cnt < 0) {
# qq()() isn't ")("
$fail = 1;
last;
}
}
$last_bs = $c eq '\\';
}
$fail = 1 if $cnt != 0;
return ($open, "$open$str$close") if not $fail;
}
return ("", $str);
}
sub single_delim {
my($q, $default, $str) = @_;
return "$default$str$default" if $default and index($str, $default) == -1;
if ($q ne 'qr') {
(my $succeed, $str) = balanced_delim($str);
return "$q$str" if $succeed;
}
for my $delim ('/', '"', '#') {
return "$q$delim" . $str . $delim if index($str, $delim) == -1;
}
if ($default) {
$str =~ s/$default/\\$default/g;
return "$default$str$default";
} else {
$str =~ s[/][\\/]g;
return "$q/$str/";
}
}
my $max_prec;
BEGIN { $max_prec = int(0.999 + 8*length(pack("F", 42))*log(2)/log(10)); }
# Split a floating point number into an integer mantissa and a binary
# exponent. Assumes you've already made sure the number isn't zero or
# some weird infinity or NaN.
sub split_float {
my($f) = @_;
my $exponent = 0;
if ($f == int($f)) {
while ($f % 2 == 0) {
$f /= 2;
$exponent++;
}
} else {
while ($f != int($f)) {
$f *= 2;
$exponent--;
}
}
my $mantissa = sprintf("%.0f", $f);
return ($mantissa, $exponent);
}
sub const {
my $self = shift;
my($sv, $cx) = @_;
if ($self->{'use_dumper'}) {
return $self->const_dumper($sv, $cx);
}
if (class($sv) eq "SPECIAL") {
# sv_undef, sv_yes, sv_no
return ('undef', '1', $self->maybe_parens("!1", $cx, 21))[$$sv-1];
}
if (class($sv) eq "NULL") {
return 'undef';
}
# convert a version object into the "v1.2.3" string in its V magic
if ($sv->FLAGS & SVs_RMG) {
for (my $mg = $sv->MAGIC; $mg; $mg = $mg->MOREMAGIC) {
return $mg->PTR if $mg->TYPE eq 'V';
}
}
if ($sv->FLAGS & SVf_IOK) {
my $str = $sv->int_value;
$str = $self->maybe_parens($str, $cx, 21) if $str < 0;
return $str;
} elsif ($sv->FLAGS & SVf_NOK) {
my $nv = $sv->NV;
if ($nv == 0) {
if (pack("F", $nv) eq pack("F", 0)) {
# positive zero
return "0";
} else {
# negative zero
return $self->maybe_parens("-.0", $cx, 21);
}
} elsif (1/$nv == 0) {
if ($nv > 0) {
# positive infinity
return $self->maybe_parens("9**9**9", $cx, 22);
} else {
# negative infinity
return $self->maybe_parens("-9**9**9", $cx, 21);
}
} elsif ($nv != $nv) {
# NaN
if (pack("F", $nv) eq pack("F", sin(9**9**9))) {
# the normal kind
return "sin(9**9**9)";
} elsif (pack("F", $nv) eq pack("F", -sin(9**9**9))) {
# the inverted kind
return $self->maybe_parens("-sin(9**9**9)", $cx, 21);
} else {
# some other kind
my $hex = unpack("h*", pack("F", $nv));
return qq'unpack("F", pack("h*", "$hex"))';
}
}
# first, try the default stringification
my $str = "$nv";
if ($str != $nv) {
# failing that, try using more precision
$str = sprintf("%.${max_prec}g", $nv);
# if (pack("F", $str) ne pack("F", $nv)) {
if ($str != $nv) {
# not representable in decimal with whatever sprintf()
# and atof() Perl is using here.
my($mant, $exp) = split_float($nv);
return $self->maybe_parens("$mant * 2**$exp", $cx, 19);
}
}
$str = $self->maybe_parens($str, $cx, 21) if $nv < 0;
return $str;
} elsif ($sv->FLAGS & SVf_ROK && $sv->can("RV")) {
my $ref = $sv->RV;
if (class($ref) eq "AV") {
return "[" . $self->list_const(2, $ref->ARRAY) . "]";
} elsif (class($ref) eq "HV") {
my %hash = $ref->ARRAY;
my @elts;
for my $k (sort keys %hash) {
push @elts, "$k => " . $self->const($hash{$k}, 6);
}
return "{" . join(", ", @elts) . "}";
} elsif (class($ref) eq "CV") {
BEGIN {
if ($] > 5.0150051) {
require overloading;
unimport overloading;
}
}
if ($] > 5.0150051 && $self->{curcv} &&
$self->{curcv}->object_2svref == $ref->object_2svref) {
return $self->keyword("__SUB__");
}
return "sub " . $self->deparse_sub($ref);
}
if ($ref->FLAGS & SVs_SMG) {
for (my $mg = $ref->MAGIC; $mg; $mg = $mg->MOREMAGIC) {
if ($mg->TYPE eq 'r') {
my $re = re_uninterp(escape_str(re_unback($mg->precomp)));
return single_delim("qr", "", $re);
}
}
}
my $const = $self->const($ref, 20);
if ($self->{in_subst_repl} && $const =~ /^[0-9]/) {
$const = "($const)";
}
return $self->maybe_parens("\\$const", $cx, 20);
} elsif ($sv->FLAGS & SVf_POK) {
my $str = $sv->PV;
if ($str =~ /[[:^print:]]/) {
return single_delim("qq", '"', uninterp escape_str unback $str);
} else {
return single_delim("q", "'", unback $str);
}
} else {
return "undef";
}
}
sub const_dumper {
my $self = shift;
my($sv, $cx) = @_;
my $ref = $sv->object_2svref();
my $dumper = Data::Dumper->new([$$ref], ['$v']);
$dumper->Purity(1)->Terse(1)->Deparse(1)->Indent(0)->Useqq(1)->Sortkeys(1);
my $str = $dumper->Dump();
if ($str =~ /^\$v/) {
return '${my ' . $str . ' \$v}';
} else {
return $str;
}
}
sub const_sv {
my $self = shift;
my $op = shift;
my $sv = $op->sv;
# the constant could be in the pad (under useithreads)
$sv = $self->padval($op->targ) unless $$sv;
return $sv;
}
sub pp_const {
my $self = shift;
my($op, $cx) = @_;
if ($op->private & OPpCONST_ARYBASE) {
return '$[';
}
# if ($op->private & OPpCONST_BARE) { # trouble with '=>' autoquoting
# return $self->const_sv($op)->PV;
# }
my $sv = $self->const_sv($op);
return $self->const($sv, $cx);
}
sub dq {
my $self = shift;
my $op = shift;
my $type = $op->name;
if ($type eq "const") {
return '$[' if $op->private & OPpCONST_ARYBASE;
return uninterp(escape_str(unback($self->const_sv($op)->as_string)));
} elsif ($type eq "concat") {
my $first = $self->dq($op->first);
my $last = $self->dq($op->last);
# Disambiguate "${foo}bar", "${foo}{bar}", "${foo}[1]", "$foo\::bar"
($last =~ /^[A-Z\\\^\[\]_?]/ &&
$first =~ s/([\$@])\^$/${1}{^}/) # "${^}W" etc
|| ($last =~ /^[:'{\[\w_]/ && #'
$first =~ s/([\$@])([A-Za-z_]\w*)$/${1}{$2}/);
return $first . $last;
} elsif ($type eq "uc") {
return '\U' . $self->dq($op->first->sibling) . '\E';
} elsif ($type eq "lc") {
return '\L' . $self->dq($op->first->sibling) . '\E';
} elsif ($type eq "ucfirst") {
return '\u' . $self->dq($op->first->sibling);
} elsif ($type eq "lcfirst") {
return '\l' . $self->dq($op->first->sibling);
} elsif ($type eq "quotemeta") {
return '\Q' . $self->dq($op->first->sibling) . '\E';
} elsif ($type eq "fc") {
return '\F' . $self->dq($op->first->sibling) . '\E';
} elsif ($type eq "join") {
return $self->deparse($op->last, 26); # was join($", @ary)
} else {
return $self->deparse($op, 26);
}
}
sub pp_backtick {
my $self = shift;
my($op, $cx) = @_;
# skip pushmark if it exists (readpipe() vs ``)
my $child = $op->first->sibling->isa('B::NULL')
? $op->first : $op->first->sibling;
if ($self->pure_string($child)) {
return single_delim("qx", '`', $self->dq($child, 1));
}
unop($self, @_, "readpipe");
}
sub dquote {
my $self = shift;
my($op, $cx) = @_;
my $kid = $op->first->sibling; # skip ex-stringify, pushmark
return $self->deparse($kid, $cx) if $self->{'unquote'};
$self->maybe_targmy($kid, $cx,
sub {single_delim("qq", '"', $self->dq($_[1]))});
}
# OP_STRINGIFY is a listop, but it only ever has one arg
sub pp_stringify { maybe_targmy(@_, \&dquote) }
# tr/// and s/// (and tr[][], tr[]//, tr###, etc)
# note that tr(from)/to/ is OK, but not tr/from/(to)
sub double_delim {
my($from, $to) = @_;
my($succeed, $delim);
if ($from !~ m[/] and $to !~ m[/]) {
return "/$from/$to/";
} elsif (($succeed, $from) = balanced_delim($from) and $succeed) {
if (($succeed, $to) = balanced_delim($to) and $succeed) {
return "$from$to";
} else {
for $delim ('/', '"', '#') { # note no "'" -- s''' is special
return "$from$delim$to$delim" if index($to, $delim) == -1;
}
$to =~ s[/][\\/]g;
return "$from/$to/";
}
} else {
for $delim ('/', '"', '#') { # note no '
return "$delim$from$delim$to$delim"
if index($to . $from, $delim) == -1;
}
$from =~ s[/][\\/]g;
$to =~ s[/][\\/]g;
return "/$from/$to/";
}
}
# Only used by tr///, so backslashes hyphens
sub pchr { # ASCII
my($n) = @_;
if ($n == ord '\\') {
return '\\\\';
} elsif ($n == ord "-") {
return "\\-";
} elsif ($n >= ord(' ') and $n <= ord('~')) {
return chr($n);
} elsif ($n == ord "\a") {
return '\\a';
} elsif ($n == ord "\b") {
return '\\b';
} elsif ($n == ord "\t") {
return '\\t';
} elsif ($n == ord "\n") {
return '\\n';
} elsif ($n == ord "\e") {
return '\\e';
} elsif ($n == ord "\f") {
return '\\f';
} elsif ($n == ord "\r") {
return '\\r';
} elsif ($n >= ord("\cA") and $n <= ord("\cZ")) {
return '\\c' . chr(ord("@") + $n);
} else {
# return '\x' . sprintf("%02x", $n);
return '\\' . sprintf("%03o", $n);
}
}
sub collapse {
my(@chars) = @_;
my($str, $c, $tr) = ("");
for ($c = 0; $c < @chars; $c++) {
$tr = $chars[$c];
$str .= pchr($tr);
if ($c <= $#chars - 2 and $chars[$c + 1] == $tr + 1 and
$chars[$c + 2] == $tr + 2)
{
for (; $c <= $#chars-1 and $chars[$c + 1] == $chars[$c] + 1; $c++)
{}
$str .= "-";
$str .= pchr($chars[$c]);
}
}
return $str;
}
sub tr_decode_byte {
my($table, $flags) = @_;
my(@table) = unpack("s*", $table);
splice @table, 0x100, 1; # Number of subsequent elements
my($c, $tr, @from, @to, @delfrom, $delhyphen);
if ($table[ord "-"] != -1 and
$table[ord("-") - 1] == -1 || $table[ord("-") + 1] == -1)
{
$tr = $table[ord "-"];
$table[ord "-"] = -1;
if ($tr >= 0) {
@from = ord("-");
@to = $tr;
} else { # -2 ==> delete
$delhyphen = 1;
}
}
for ($c = 0; $c < @table; $c++) {
$tr = $table[$c];
if ($tr >= 0) {
push @from, $c; push @to, $tr;
} elsif ($tr == -2) {
push @delfrom, $c;
}
}
@from = (@from, @delfrom);
if ($flags & OPpTRANS_COMPLEMENT) {
my @newfrom = ();
my %from;
@from{@from} = (1) x @from;
for ($c = 0; $c < 256; $c++) {
push @newfrom, $c unless $from{$c};
}
@from = @newfrom;
}
unless ($flags & OPpTRANS_DELETE || !@to) {
pop @to while $#to and $to[$#to] == $to[$#to -1];
}
my($from, $to);
$from = collapse(@from);
$to = collapse(@to);
$from .= "-" if $delhyphen;
return ($from, $to);
}
sub tr_chr {
my $x = shift;
if ($x == ord "-") {
return "\\-";
} elsif ($x == ord "\\") {
return "\\\\";
} else {
return chr $x;
}
}
# XXX This doesn't yet handle all cases correctly either
sub tr_decode_utf8 {
my($swash_hv, $flags) = @_;
my %swash = $swash_hv->ARRAY;
my $final = undef;
$final = $swash{'FINAL'}->IV if exists $swash{'FINAL'};
my $none = $swash{"NONE"}->IV;
my $extra = $none + 1;
my(@from, @delfrom, @to);
my $line;
foreach $line (split /\n/, $swash{'LIST'}->PV) {
my($min, $max, $result) = split(/\t/, $line);
$min = hex $min;
if (length $max) {
$max = hex $max;
} else {
$max = $min;
}
$result = hex $result;
if ($result == $extra) {
push @delfrom, [$min, $max];
} else {
push @from, [$min, $max];
push @to, [$result, $result + $max - $min];
}
}
for my $i (0 .. $#from) {
if ($from[$i][0] == ord '-') {
unshift @from, splice(@from, $i, 1);
unshift @to, splice(@to, $i, 1);
last;
} elsif ($from[$i][1] == ord '-') {
$from[$i][1]--;
$to[$i][1]--;
unshift @from, ord '-';
unshift @to, ord '-';
last;
}
}
for my $i (0 .. $#delfrom) {
if ($delfrom[$i][0] == ord '-') {
push @delfrom, splice(@delfrom, $i, 1);
last;
} elsif ($delfrom[$i][1] == ord '-') {
$delfrom[$i][1]--;
push @delfrom, ord '-';
last;
}
}
if (defined $final and $to[$#to][1] != $final) {
push @to, [$final, $final];
}
push @from, @delfrom;
if ($flags & OPpTRANS_COMPLEMENT) {
my @newfrom;
my $next = 0;
for my $i (0 .. $#from) {
push @newfrom, [$next, $from[$i][0] - 1];
$next = $from[$i][1] + 1;
}
@from = ();
for my $range (@newfrom) {
if ($range->[0] <= $range->[1]) {
push @from, $range;
}
}
}
my($from, $to, $diff);
for my $chunk (@from) {
$diff = $chunk->[1] - $chunk->[0];
if ($diff > 1) {
$from .= tr_chr($chunk->[0]) . "-" . tr_chr($chunk->[1]);
} elsif ($diff == 1) {
$from .= tr_chr($chunk->[0]) . tr_chr($chunk->[1]);
} else {
$from .= tr_chr($chunk->[0]);
}
}
for my $chunk (@to) {
$diff = $chunk->[1] - $chunk->[0];
if ($diff > 1) {
$to .= tr_chr($chunk->[0]) . "-" . tr_chr($chunk->[1]);
} elsif ($diff == 1) {
$to .= tr_chr($chunk->[0]) . tr_chr($chunk->[1]);
} else {
$to .= tr_chr($chunk->[0]);
}
}
#$final = sprintf("%04x", $final) if defined $final;
#$none = sprintf("%04x", $none) if defined $none;
#$extra = sprintf("%04x", $extra) if defined $extra;
#print STDERR "final: $final\n none: $none\nextra: $extra\n";
#print STDERR $swash{'LIST'}->PV;
return (escape_str($from), escape_str($to));
}
sub pp_trans {
my $self = shift;
my($op, $cx) = @_;
my($from, $to);
my $class = class($op);
my $priv_flags = $op->private;
if ($class eq "PVOP") {
($from, $to) = tr_decode_byte($op->pv, $priv_flags);
} elsif ($class eq "PADOP") {
($from, $to)
= tr_decode_utf8($self->padval($op->padix)->RV, $priv_flags);
} else { # class($op) eq "SVOP"
($from, $to) = tr_decode_utf8($op->sv->RV, $priv_flags);
}
my $flags = "";
$flags .= "c" if $priv_flags & OPpTRANS_COMPLEMENT;
$flags .= "d" if $priv_flags & OPpTRANS_DELETE;
$to = "" if $from eq $to and $flags eq "";
$flags .= "s" if $priv_flags & OPpTRANS_SQUASH;
return "tr" . double_delim($from, $to) . $flags;
}
sub pp_transr { &pp_trans . 'r' }
sub re_dq_disambiguate {
my ($first, $last) = @_;
# Disambiguate "${foo}bar", "${foo}{bar}", "${foo}[1]"
($last =~ /^[A-Z\\\^\[\]_?]/ &&
$first =~ s/([\$@])\^$/${1}{^}/) # "${^}W" etc
|| ($last =~ /^[{\[\w_]/ &&
$first =~ s/([\$@])([A-Za-z_]\w*)$/${1}{$2}/);
return $first . $last;
}
# Like dq(), but different
sub re_dq {
my $self = shift;
my ($op, $extended) = @_;
my $type = $op->name;
if ($type eq "const") {
return '$[' if $op->private & OPpCONST_ARYBASE;
my $unbacked = re_unback($self->const_sv($op)->as_string);
return re_uninterp_extended(escape_extended_re($unbacked))
if $extended;
return re_uninterp(escape_str($unbacked));
} elsif ($type eq "concat") {
my $first = $self->re_dq($op->first, $extended);
my $last = $self->re_dq($op->last, $extended);
return re_dq_disambiguate($first, $last);
} elsif ($type eq "uc") {
return '\U' . $self->re_dq($op->first->sibling, $extended) . '\E';
} elsif ($type eq "lc") {
return '\L' . $self->re_dq($op->first->sibling, $extended) . '\E';
} elsif ($type eq "ucfirst") {
return '\u' . $self->re_dq($op->first->sibling, $extended);
} elsif ($type eq "lcfirst") {
return '\l' . $self->re_dq($op->first->sibling, $extended);
} elsif ($type eq "quotemeta") {
return '\Q' . $self->re_dq($op->first->sibling, $extended) . '\E';
} elsif ($type eq "fc") {
return '\F' . $self->re_dq($op->first->sibling, $extended) . '\E';
} elsif ($type eq "join") {
return $self->deparse($op->last, 26); # was join($", @ary)
} else {
my $ret = $self->deparse($op, 26);
$ret =~ s/^\$([(|)])\z/\${$1}/; # $( $| $) need braces
return $ret;
}
}
sub pure_string {
my ($self, $op) = @_;
return 0 if null $op;
my $type = $op->name;
if ($type eq 'const' || $type eq 'av2arylen') {
return 1;
}
elsif ($type =~ /^(?:[ul]c(first)?|fc)$/ || $type eq 'quotemeta') {
return $self->pure_string($op->first->sibling);
}
elsif ($type eq 'join') {
my $join_op = $op->first->sibling; # Skip pushmark
return 0 unless $join_op->name eq 'null' && $join_op->targ == OP_RV2SV;
my $gvop = $join_op->first;
return 0 unless $gvop->name eq 'gvsv';
return 0 unless '"' eq $self->gv_name($self->gv_or_padgv($gvop));
return 0 unless ${$join_op->sibling} eq ${$op->last};
return 0 unless $op->last->name =~ /^(?:[ah]slice|(?:rv2|pad)av)$/;
}
elsif ($type eq 'concat') {
return $self->pure_string($op->first)
&& $self->pure_string($op->last);
}
elsif (is_scalar($op) || $type =~ /^[ah]elem$/) {
return 1;
}
elsif ($type eq "null" and $op->can('first') and not null $op->first and
($op->first->name eq "null" and $op->first->can('first')
and not null $op->first->first and
$op->first->first->name eq "aelemfast"
or
$op->first->name =~ /^aelemfast(?:_lex)?\z/
)) {
return 1;
}
else {
return 0;
}
return 1;
}
sub regcomp {
my $self = shift;
my($op, $cx, $extended) = @_;
my $kid = $op->first;
$kid = $kid->first if $kid->name eq "regcmaybe";
$kid = $kid->first if $kid->name eq "regcreset";
if ($kid->name eq "null" and !null($kid->first)
and $kid->first->name eq 'pushmark')
{
my $str = '';
$kid = $kid->first->sibling;
while (!null($kid)) {
my $first = $str;
my $last = $self->re_dq($kid, $extended);
$str = re_dq_disambiguate($first, $last);
$kid = $kid->sibling;
}
return $str, 1;
}
return ($self->re_dq($kid, $extended), 1) if $self->pure_string($kid);
return ($self->deparse($kid, $cx), 0);
}
sub pp_regcomp {
my ($self, $op, $cx) = @_;
return (($self->regcomp($op, $cx, 0))[0]);
}
sub re_flags {
my ($self, $op) = @_;
my $flags = '';
my $pmflags = $op->pmflags;
$flags .= "g" if $pmflags & PMf_GLOBAL;
$flags .= "i" if $pmflags & PMf_FOLD;
$flags .= "m" if $pmflags & PMf_MULTILINE;
$flags .= "o" if $pmflags & PMf_KEEP;
$flags .= "s" if $pmflags & PMf_SINGLELINE;
$flags .= "x" if $pmflags & PMf_EXTENDED;
$flags .= "p" if $pmflags & RXf_PMf_KEEPCOPY;
if (my $charset = $pmflags & RXf_PMf_CHARSET) {
# Hardcoding this is fragile, but B does not yet export the
# constants we need.
$flags .= qw(d l u a aa)[$charset >> 5]
}
# The /d flag is indicated by 0; only show it if necessary.
elsif ($self->{hinthash} and
$self->{hinthash}{reflags_charset}
|| $self->{hinthash}{feature_unicode}
or $self->{hints} & $feature::hint_mask
&& ($self->{hints} & $feature::hint_mask)
!= $feature::hint_mask
&& do {
$self->{hints} & $feature::hint_uni8bit;
}
) {
$flags .= 'd';
}
$flags;
}
# osmic acid -- see osmium tetroxide
my %matchwords;
map($matchwords{join "", sort split //, $_} = $_, 'cig', 'cog', 'cos', 'cogs',
'cox', 'go', 'is', 'ism', 'iso', 'mig', 'mix', 'osmic', 'ox', 'sic',
'sig', 'six', 'smog', 'so', 'soc', 'sog', 'xi');
sub matchop {
my $self = shift;
my($op, $cx, $name, $delim) = @_;
my $kid = $op->first;
my ($binop, $var, $re) = ("", "", "");
if ($op->flags & OPf_STACKED) {
$binop = 1;
$var = $self->deparse($kid, 20);
$kid = $kid->sibling;
}
my $quote = 1;
my $pmflags = $op->pmflags;
my $extended = ($pmflags & PMf_EXTENDED);
my $rhs_bound_to_defsv;
if (null $kid) {
my $unbacked = re_unback($op->precomp);
if ($extended) {
$re = re_uninterp_extended(escape_extended_re($unbacked));
} else {
$re = re_uninterp(escape_str(re_unback($op->precomp)));
}
} elsif ($kid->name ne 'regcomp') {
carp("found ".$kid->name." where regcomp expected");
} else {
($re, $quote) = $self->regcomp($kid, 21, $extended);
my $matchop = $kid->first;
if ($matchop->name eq 'regcrest') {
$matchop = $matchop->first;
}
if ($matchop->name =~ /^(?:match|transr?|subst)\z/
&& $matchop->flags & OPf_SPECIAL) {
$rhs_bound_to_defsv = 1;
}
}
my $flags = "";
$flags .= "c" if $pmflags & PMf_CONTINUE;
$flags .= $self->re_flags($op);
$flags = join '', sort split //, $flags;
$flags = $matchwords{$flags} if $matchwords{$flags};
if ($pmflags & PMf_ONCE) { # only one kind of delimiter works here
$re =~ s/\?/\\?/g;
$re = "?$re?";
} elsif ($quote) {
$re = single_delim($name, $delim, $re);
}
$re = $re . $flags if $quote;
if ($binop) {
return
$self->maybe_parens(
$rhs_bound_to_defsv
? "$var =~ (\$_ =~ $re)"
: "$var =~ $re",
$cx, 20
);
} else {
return $re;
}
}
sub pp_match { matchop(@_, "m", "/") }
sub pp_pushre { matchop(@_, "m", "/") }
sub pp_qr { matchop(@_, "qr", "") }
sub pp_runcv { unop(@_, "__SUB__"); }
sub pp_split {
my $self = shift;
my($op, $cx) = @_;
my($kid, @exprs, $ary, $expr);
$kid = $op->first;
# For our kid (an OP_PUSHRE), pmreplroot is never actually the
# root of a replacement; it's either empty, or abused to point to
# the GV for an array we split into (an optimization to save
# assignment overhead). Depending on whether we're using ithreads,
# this OP* holds either a GV* or a PADOFFSET. Luckily, B.xs
# figures out for us which it is.
my $replroot = $kid->pmreplroot;
my $gv = 0;
if (ref($replroot) eq "B::GV") {
$gv = $replroot;
} elsif (!ref($replroot) and $replroot > 0) {
$gv = $self->padval($replroot);
}
$ary = $self->stash_variable('@', $self->gv_name($gv), $cx) if $gv;
for (; !null($kid); $kid = $kid->sibling) {
push @exprs, $self->deparse($kid, 6);
}
# handle special case of split(), and split(' ') that compiles to /\s+/
# Under 5.10, the reflags may be undef if the split regexp isn't a constant
# Under 5.17.5-5.17.9, the special flag is on split itself.
$kid = $op->first;
if ( $op->flags & OPf_SPECIAL
or (
$kid->flags & OPf_SPECIAL
and ( $] < 5.009 ? $kid->pmflags & PMf_SKIPWHITE()
: ($kid->reflags || 0) & RXf_SKIPWHITE()
)
)
) {
$exprs[0] = "' '";
}
$expr = "split(" . join(", ", @exprs) . ")";
if ($ary) {
return $self->maybe_parens("$ary = $expr", $cx, 7);
} else {
return $expr;
}
}
# oxime -- any of various compounds obtained chiefly by the action of
# hydroxylamine on aldehydes and ketones and characterized by the
# bivalent grouping C=NOH [Webster's Tenth]
my %substwords;
map($substwords{join "", sort split //, $_} = $_, 'ego', 'egoism', 'em',
'es', 'ex', 'exes', 'gee', 'go', 'goes', 'ie', 'ism', 'iso', 'me',
'meese', 'meso', 'mig', 'mix', 'os', 'ox', 'oxime', 'see', 'seem',
'seg', 'sex', 'sig', 'six', 'smog', 'sog', 'some', 'xi', 'rogue',
'sir', 'rise', 'smore', 'more', 'seer', 'rome', 'gore', 'grim', 'grime',
'or', 'rose', 'rosie');
sub pp_subst {
my $self = shift;
my($op, $cx) = @_;
my $kid = $op->first;
my($binop, $var, $re, $repl) = ("", "", "", "");
if ($op->flags & OPf_STACKED) {
$binop = 1;
$var = $self->deparse($kid, 20);
$kid = $kid->sibling;
}
my $flags = "";
my $pmflags = $op->pmflags;
if (null($op->pmreplroot)) {
$repl = $kid;
$kid = $kid->sibling;
} else {
$repl = $op->pmreplroot->first; # skip substcont
}
while ($repl->name eq "entereval") {
$repl = $repl->first;
$flags .= "e";
}
{
local $self->{in_subst_repl} = 1;
if ($pmflags & PMf_EVAL) {
$repl = $self->deparse($repl->first, 0);
} else {
$repl = $self->dq($repl);
}
}
my $extended = ($pmflags & PMf_EXTENDED);
if (null $kid) {
my $unbacked = re_unback($op->precomp);
if ($extended) {
$re = re_uninterp_extended(escape_extended_re($unbacked));
}
else {
$re = re_uninterp(escape_str($unbacked));
}
} else {
($re) = $self->regcomp($kid, 1, $extended);
}
$flags .= "r" if $pmflags & PMf_NONDESTRUCT;
$flags .= "e" if $pmflags & PMf_EVAL;
$flags .= $self->re_flags($op);
$flags = join '', sort split //, $flags;
$flags = $substwords{$flags} if $substwords{$flags};
if ($binop) {
return $self->maybe_parens("$var =~ s"
. double_delim($re, $repl) . $flags,
$cx, 20);
} else {
return "s". double_delim($re, $repl) . $flags;
}
}
sub is_lexical_subs {
my (@ops) = shift;
for my $op (@ops) {
return 0 if $op->name !~ /\A(?:introcv|clonecv)\z/;
}
return 1;
}
sub pp_introcv {
my $self = shift;
my($op, $cx) = @_;
# For now, deparsing doesn't worry about the distinction between introcv
# and clonecv, so pretend this op doesn't exist:
return '';
}
sub pp_clonecv {
my $self = shift;
my($op, $cx) = @_;
my $sv = $self->padname_sv($op->targ);
my $name = substr $sv->PVX, 1; # skip &/$/@/%, like $self->padany
return "my sub $name";
}
sub pp_padcv {
my $self = shift;
my($op, $cx) = @_;
return $self->padany($op);
}
1;
__END__
#line 5481