+# B::Deparse.pm
+# Copyright (c) 1998 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 'cluck';
+use B qw(class main_root main_start main_cv svref_2object);
+$VERSION = 0.51;
use strict;
-use B qw(peekop class main_root);
-my $debug;
+# Changes between 0.50 and 0.51:
+# - fixed nulled leave with live enter in sort { }
+# - fixed reference constants (\"str")
+# - handle empty programs gracefully
+# - handle infinte loops (for (;;) {}, while (1) {})
+# - differentiate between `for my $x ...' and `my $x; for $x ...'
+# - various minor cleanups
+# - moved globals into an object
+# - added `-u', like B::C
+# - package declarations using cop_stash
+# - subs, formats and code sorted by cop_seq
+
+# Todo:
+# - eliminate superfluous parentheses
+# - 'EXPR1 && EXPR2;' => 'EXPR2 if EXPR1;'
+# - pp_threadsv (incl. in foreach)
+# - style options
+# - '&&' => 'and'?
+# - ',' => '=>' (auto-unquote?)
+# - break long lines ("\r" as discretionary break?)
+# - version using op_next instead of op_first/sibling?
+# - avoid string copies (pass arrays, one big join?)
+# - auto-apply `-u'?
+# - documentation
+
+# The following OPs don't have functions:
+
+# pp_threadsv -- see Todo
+
+# pp_padany -- does not exist after parsing
+# pp_rcatline -- does not exist
+
+# pp_leavesub -- see deparse_sub
+# pp_leavewrite -- see deparse_format
+# pp_method -- see entersub
+# pp_regcmaybe -- see regcomp
+# pp_substcont -- see subst
+# pp_grepstart -- see grepwhile
+# pp_mapstart -- see mapwhile
+# pp_flip -- see flop
+# pp_iter -- see leaveloop
+# pp_enterloop -- see leaveloop
+# pp_leaveeval -- see entereval
+# pp_entertry -- see leavetry
+
+# Object fields (were globals):
+#
+# avoid_local:
+# (local($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
+#
+# curstash:
+# name of the current package for deparsed code
+#
+# subs_todo:
+# array of [cop_seq, GV, is_format?] for subs and formats we still
+# want to deparse
+#
+# subs_done, forms_done:
+# keys are addresses of GVs for subs and formats we've already
+# deparsed (or at least put into subs_todo)
+
+sub null {
+ my $op = shift;
+ return class($op) eq "NULL";
+}
+
+sub todo {
+ my $self = shift;
+ my($gv, $cv, $is_form) = @_;
+ my $seq;
+ if (!null($cv->START) and is_state($cv->START)) {
+ $seq = $cv->START->cop_seq;
+ } else {
+ $seq = 0;
+ }
+ push @{$self->{'subs_todo'}}, [$seq, $gv, $is_form];
+}
+
+sub next_todo {
+ my $self = shift;
+ my $ent = shift @{$self->{'subs_todo'}};
+ my $name = $self->gv_name($ent->[1]);
+ if ($ent->[2]) {
+ return "format $name =\n"
+ . $self->deparse_format($ent->[1]->FORM). "\n";
+ } else {
+ return "sub $name " .
+ $self->deparse_sub($ent->[1]->CV);
+ }
+}
+
+sub OPf_KIDS () { 4 }
+
+sub walk_tree {
+ my($op, $sub) = @_;
+ $sub->($op);
+ if ($op->flags & OPf_KIDS) {
+ my $kid;
+ for ($kid = $op->first; not null $kid; $kid = $kid->sibling) {
+ walk_tree($kid, $sub);
+ }
+ }
+}
+
+sub walk_sub {
+ my $self = shift;
+ my $cv = shift;
+ my $op = $cv->ROOT;
+ $op = shift if null $op;
+ return if !$op or null $op;
+ walk_tree($op, sub {
+ my $op = shift;
+ if ($op->ppaddr eq "pp_gv") {
+ if ($op->next->ppaddr eq "pp_entersub") {
+ next if $self->{'subs_done'}{$ {$op->gv}}++;
+ next if class($op->gv->CV) eq "SPECIAL";
+ $self->todo($op->gv, $op->gv->CV, 0);
+ $self->walk_sub($op->gv->CV);
+ } elsif ($op->next->ppaddr eq "pp_enterwrite"
+ or ($op->next->ppaddr eq "pp_rv2gv"
+ and $op->next->next->ppaddr eq "pp_enterwrite")) {
+ next if $self->{'forms_done'}{$ {$op->gv}}++;
+ next if class($op->gv->FORM) eq "SPECIAL";
+ $self->todo($op->gv, $op->gv->FORM, 1);
+ $self->walk_sub($op->gv->FORM);
+ }
+ }
+ });
+}
+
+sub stash_subs {
+ my $self = shift;
+ my $pack = shift;
+ my(%stash, @ret);
+ { no strict 'refs'; %stash = svref_2object(\%{$pack . "::"})->ARRAY }
+ my($key, $val);
+ while (($key, $val) = each %stash) {
+ next unless class($val) eq "GV";
+ if (class($val->CV) ne "SPECIAL") {
+ next if $self->{'subs_done'}{$$val}++;
+ $self->todo($val, $val->CV, 0);
+ $self->walk_sub($val->CV);
+ }
+ if (class($val->FORM) ne "SPECIAL") {
+ next if $self->{'forms_done'}{$$val}++;
+ $self->todo($val, $val->FORM, 1);
+ $self->walk_sub($val->FORM);
+ }
+ }
+}
sub compile {
- my $opt = shift;
- if ($opt eq "-d") {
- $debug = 1;
+ my(@args) = @_;
+ return sub {
+ my $self = bless {};
+ my $arg;
+ $self->{'subs_todo'} = [];
+ $self->stash_subs("main");
+ $self->{'curcv'} = main_cv;
+ $self->{'curstash'} = "main";
+ while ($arg = shift @args) {
+ if (substr($arg, 0, 2) eq "-u") {
+ $self->stash_subs(substr($arg, 2));
+ }
+ }
+ $self->walk_sub(main_cv, main_start);
+ @{$self->{'subs_todo'}} =
+ sort {$a->[0] <=> $b->[0]} @{$self->{'subs_todo'}};
+ print indent($self->deparse(main_root)), "\n" unless null main_root;
+ my @text;
+ while (scalar(@{$self->{'subs_todo'}})) {
+ push @text, $self->next_todo;
+ }
+ print indent(join("", @text)), "\n" if @text;
}
- return sub { print deparse(main_root), "\n" }
}
-sub ppname {
+sub deparse {
+ my $self = shift;
my $op = shift;
- my $ppname = $op->ppaddr;
- warn sprintf("ppname %s\n", peekop($op)) if $debug;
- no strict "refs";
- return defined(&$ppname) ? &$ppname($op) : 0;
+# cluck unless ref $op;
+ my $meth = $op->ppaddr;
+ return $self->$meth($op);
}
-sub deparse {
+sub indent {
+ my $txt = shift;
+ my @lines = split(/\n/, $txt);
+ my $leader = "";
+ my $line;
+ for $line (@lines) {
+ if (substr($line, 0, 1) eq "\t") {
+ $leader = $leader . " ";
+ $line = substr($line, 1);
+ } elsif (substr($line, 0, 1) eq "\b") {
+ $leader = substr($leader, 0, length($leader) - 4);
+ $line = substr($line, 1);
+ }
+ $line = $leader . $line;
+ }
+ return join("\n", @lines);
+}
+
+sub SVf_POK () {0x40000}
+
+sub deparse_sub {
+ my $self = shift;
+ my $cv = shift;
+ my $proto = "";
+ if ($cv->FLAGS & SVf_POK) {
+ $proto = "(". $cv->PV . ") ";
+ }
+ local($self->{'curcv'}) = $cv;
+ local($self->{'curstash'}) = $self->{'curstash'};
+ if (not null $cv->ROOT) {
+ # skip leavesub
+ return $proto . "{\n\t" .
+ $self->deparse($cv->ROOT->first) . "\n\b}\n";
+ } else { # XSUB?
+ return $proto . "{}\n";
+ }
+}
+
+sub deparse_format {
+ my $self = shift;
+ my $form = shift;
+ my @text;
+ local($self->{'curcv'}) = $form;
+ local($self->{'curstash'}) = $self->{'curstash'};
+ my $op = $form->ROOT;
+ my $kid;
+ $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, $kid->sv->PV;
+ $kid = $kid->sibling;
+ for (; not null $kid; $kid = $kid->sibling) {
+ push @exprs, $self->deparse($kid);
+ }
+ push @text, join(", ", @exprs)."\n" if @exprs;
+ $op = $op->sibling;
+ }
+ return join("", @text) . ".";
+}
+
+# the aassign in-common check messes up SvCUR (always setting it
+# to a value >= 100), but it's probably safe to assume there
+# won't be any NULs in the names of my() variables. (with
+# stash variables, I wouldn't be so sure)
+sub padname_fix {
+ my $str = shift;
+ $str = substr($str, 0, index($str, "\0")) if index($str, "\0") != -1;
+ return $str;
+}
+
+sub is_scope {
my $op = shift;
- my $expr;
- warn sprintf("deparse %s\n", peekop($op)) if $debug;
- while (ref($expr = ppname($op))) {
- $op = $expr;
- warn sprintf("Redirecting to %s\n", peekop($op)) if $debug;
+ return $op->ppaddr eq "pp_leave" || $op->ppaddr eq "pp_scope"
+ || ($op->ppaddr eq "pp_null" && class($op) eq "UNOP"
+ && (is_scope($op->first) || $op->first->ppaddr eq "pp_enter"));
+}
+
+sub is_state {
+ my $name = $_[0]->ppaddr;
+ return $name eq "pp_nextstate" || $name eq "pp_dbstate";
+}
+
+sub is_miniwhile { # check for one-line loop (`foo() while $y--')
+ my $op = shift;
+ return (!null($op) and null($op->sibling)
+ and $op->ppaddr eq "pp_null" and class($op) eq "UNOP"
+ and (($op->first->ppaddr =~ /^pp_(and|or)$/
+ and $op->first->first->sibling->ppaddr eq "pp_lineseq")
+ or ($op->first->ppaddr eq "pp_lineseq"
+ and not null $op->first->first->sibling
+ and $op->first->first->sibling->ppaddr eq "pp_unstack")
+ ));
+}
+
+sub is_scalar {
+ my $op = shift;
+ return ($op->ppaddr eq "pp_rv2sv" or
+ $op->ppaddr eq "pp_padsv" or
+ $op->ppaddr eq "pp_gv" or # only in array/hash constructs
+ !null($op->first) && $op->first->ppaddr eq "pp_gvsv");
+}
+
+sub OPp_LVAL_INTRO () { 128 }
+
+sub maybe_local {
+ my $self = shift;
+ my($op, $text) = @_;
+ if ($op->private & OPp_LVAL_INTRO and not $self->{'avoid_local'}{$$op}) {
+ return "local(" . $text . ")";
+ } else {
+ return $text;
}
- return $expr;
}
+sub padname_sv {
+ my $self = shift;
+ my $targ = shift;
+ return (($self->{'curcv'}->PADLIST->ARRAY)[0]->ARRAY)[$targ];
+}
+
+sub maybe_my {
+ my $self = shift;
+ my($op, $text) = @_;
+ if ($op->private & OPp_LVAL_INTRO and not $self->{'avoid_local'}{$$op}) {
+ return "my(" . $text . ")";
+ } else {
+ return $text;
+ }
+}
+
+sub pp_enter {cluck "unexpected OP_ENTER"; ""} # see also leave
+
+# leave, scope, and lineseq should probably share code
sub pp_leave {
+ my $self = shift;
+ my $op = shift;
+ my ($kid, $expr);
+ my @exprs;
+ local($self->{'curstash'}) = $self->{'curstash'};
+ $kid = $op->first->sibling; # skip enter
+ if (is_miniwhile($kid)) {
+ my $top = $kid->first;
+ my $name = $top->ppaddr;
+ if ($name eq "pp_and") {
+ $name = "while";
+ } elsif ($name eq "pp_or") {
+ $name = "until";
+ } else { # no conditional -> while 1 or until 0
+ return $self->deparse($top->first) . " while 1";
+ }
+ my $cond = $top->first;
+ my $body = $cond->sibling;
+ $cond = $self->deparse($cond);
+ $body = $self->deparse($body);
+ return "$body $name $cond";
+ }
+ for (; !null($kid); $kid = $kid->sibling) {
+ $expr = "";
+ if (is_state $kid) {
+ $expr = $self->deparse($kid);
+ $kid = $kid->sibling;
+ last if null $kid;
+ }
+ $expr .= $self->deparse($kid);
+ if (is_scope($kid) and not is_miniwhile($kid->first->sibling)) {
+ $expr = "do {$expr}";
+ }
+ push @exprs, $expr if $expr;
+ }
+ return join(";\n", @exprs);
+}
+
+sub pp_scope {
+ my $self = shift;
+ my $op = shift;
+ my ($kid, $expr);
+ my @exprs;
+ for ($kid = $op->first; !null($kid); $kid = $kid->sibling) {
+ $expr = "";
+ if (is_state $kid) {
+ $expr = $self->deparse($kid);
+ $kid = $kid->sibling;
+ last if null $kid;
+ }
+ $expr .= $self->deparse($kid);
+ if (is_scope($kid)) {
+ $expr = "do {$expr}";
+ }
+ push @exprs, $expr if $expr;
+ }
+ return join("; ", @exprs);
+}
+
+sub pp_lineseq {
+ my $self = shift;
my $op = shift;
- my ($child, $expr);
- for ($child = $op->first; !$expr; $child = $child->sibling) {
- $expr = ppname($child);
+ my ($kid, $expr);
+ my @exprs;
+ for ($kid = $op->first; !null($kid); $kid = $kid->sibling) {
+ $expr = "";
+ if (is_state $kid) {
+ $expr = $self->deparse($kid);
+ $kid = $kid->sibling;
+ last if null $kid;
+ }
+ $expr .= $self->deparse($kid);
+ if (is_scope($kid) and not is_miniwhile($kid->first->sibling)) {
+ $expr = "do {$expr}";
+ }
+ push @exprs, $expr if $expr;
+ }
+ return join(";\n", @exprs);
+}
+
+# The BEGIN {} is used here because otherwise this code isn't executed
+# when you run B::Deparse on itself.
+my %globalnames;
+BEGIN { map($globalnames{$_}++, "SIG", "STDIN", "STDOUT", "STDERR", "INC",
+ "ENV", "ARGV", "ARGVOUT", "_"); }
+
+sub gv_name {
+ my $self = shift;
+ my $gv = shift;
+ my $stash = $gv->STASH->NAME;
+ my $name = $gv->NAME;
+ if ($stash eq $self->{'curstash'} or $globalnames{$name}) {
+ $stash = "";
+ } else {
+ $stash = $stash . "::";
}
- return $expr;
+ if ($name =~ /^([\cA-\cZ])$/) {
+ $name = "^" . chr(64 + ord($1));
+ }
+ return $stash . $name;
}
+# Notice how subs and formats are inserted between statements here
+sub pp_nextstate {
+ my $self = shift;
+ my $op = shift;
+ my @text;
+ @text = $op->label . ": " if $op->label;
+ my $seq = $op->cop_seq;
+ while (scalar(@{$self->{'subs_todo'}})
+ and $seq > $self->{'subs_todo'}[0][0]) {
+ push @text, $self->next_todo;
+ }
+ my $stash = $op->stash->NAME;
+ if ($stash ne $self->{'curstash'}) {
+ push @text, "package $stash;\n";
+ $self->{'curstash'} = $stash;
+ }
+ return join("", @text);
+}
+
+sub pp_dbstate { pp_nextstate(@_) }
+
+sub pp_unstack { return "" } # see also leaveloop
+
+sub baseop {
+ my $self = shift;
+ my($op, $name) = @_;
+ return $name;
+}
+
+sub pp_stub { baseop(@_, "()") }
+sub pp_wantarray { baseop(@_, "wantarray") }
+sub pp_fork { baseop(@_, "fork") }
+sub pp_wait { baseop(@_, "wait") }
+sub pp_getppid { baseop(@_, "getppid") }
+sub pp_time { 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 }
+
+sub OPf_SPECIAL () { 128 }
+
+sub unop {
+ my $self = shift;
+ my($op, $name, $flags) = (@_, 0);
+ my $kid;
+ if (class($op) eq "UNOP") {
+ $kid = $op->first;
+ $kid = "(" . $self->deparse($kid) . ")";
+ } else {
+ $kid = ($op->flags & OPf_SPECIAL ? "()" : "");
+ }
+ return ($flags & POSTFIX) ? "$kid$name" : "$name$kid";
+}
+
+sub pp_preinc { unop(@_, "++") }
+sub pp_predec { unop(@_, "--") }
+sub pp_postinc { unop(@_, "++", POSTFIX) }
+sub pp_postdec { unop(@_, "--", POSTFIX) }
+sub pp_i_preinc { unop(@_, "++") }
+sub pp_i_predec { unop(@_, "--") }
+sub pp_i_postinc { unop(@_, "++", POSTFIX) }
+sub pp_i_postdec { unop(@_, "--", POSTFIX) }
+sub pp_negate { unop(@_, "-") }
+sub pp_i_negate { unop(@_, "-") }
+sub pp_not { unop(@_, "!") }
+sub pp_complement { unop(@_, "~") }
+
+sub pp_chop { unop(@_, "chop") }
+sub pp_chomp { unop(@_, "chomp") }
+sub pp_schop { unop(@_, "chop") }
+sub pp_schomp { unop(@_, "chomp") }
+sub pp_defined { unop(@_, "defined") }
+sub pp_undef { unop(@_, "undef") }
+sub pp_study { unop(@_, "study") }
+sub pp_scalar { unop(@_, "scalar") }
+sub pp_ref { unop(@_, "ref") }
+sub pp_pos { maybe_local(@_, unop(@_, "pos")) }
+
+sub pp_sin { unop(@_, "sin") }
+sub pp_cos { unop(@_, "cos") }
+sub pp_rand { unop(@_, "rand") }
+sub pp_srand { unop(@_, "srand") }
+sub pp_exp { unop(@_, "exp") }
+sub pp_log { unop(@_, "log") }
+sub pp_sqrt { unop(@_, "sqrt") }
+sub pp_int { unop(@_, "int") }
+sub pp_hex { unop(@_, "hex") }
+sub pp_oct { unop(@_, "oct") }
+sub pp_abs { unop(@_, "abs") }
+
+sub pp_length { unop(@_, "length") }
+sub pp_ord { unop(@_, "ord") }
+sub pp_chr { unop(@_, "chr") }
+sub pp_ucfirst { unop(@_, "ucfirst") }
+sub pp_lcfirst { unop(@_, "lcfirst") }
+sub pp_uc { unop(@_, "uc") }
+sub pp_lc { unop(@_, "lc") }
+sub pp_quotemeta { unop(@_, "quotemeta") }
+
+sub pp_each { unop(@_, "each") }
+sub pp_values { unop(@_, "values") }
+sub pp_keys { 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_binmode { unop(@_, "binmode") }
+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 { unop(@_, "chdir") }
+sub pp_chroot { unop(@_, "chroot") }
+sub pp_readlink { unop(@_, "readlink") }
+sub pp_rmdir { 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 { unop(@_, "getpgrp") }
+sub pp_localtime { unop(@_, "localtime") }
+sub pp_gmtime { unop(@_, "gmtime") }
+sub pp_alarm { unop(@_, "alarm") }
+sub pp_sleep { unop(@_, "sleep") }
+
+sub pp_dofile { unop(@_, "do") }
+sub pp_entereval { unop(@_, "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_exists {
+ my $self = shift;
+ my $op = shift;
+ return "exists(" . $self->pp_helem($op->first) . ")";
+}
+
+sub OPpSLICE () { 64 }
+
+sub pp_delete {
+ my $self = shift;
+ my $op = shift;
+ my $arg;
+ if ($op->private & OPpSLICE) {
+ $arg = $self->pp_hslice($op->first);
+ } else {
+ $arg = $self->pp_helem($op->first);
+ }
+ return "delete($arg)";
+}
+
+sub OPp_CONST_BARE () { 64 }
+
+sub pp_require {
+ my $self = shift;
+ my $op = shift;
+ if (class($op) eq "UNOP" and $op->first->ppaddr eq "pp_const"
+ and $op->first->private & OPp_CONST_BARE)
+ {
+ my $name = $op->first->sv->PV;
+ $name =~ s[/][::]g;
+ $name =~ s/\.pm//g;
+ return "require($name)";
+ } else {
+ $self->unop($op, "require");
+ }
+}
+
+sub padval {
+ my $self = shift;
+ my $targ = shift;
+ return (($self->{'curcv'}->PADLIST->ARRAY)[1]->ARRAY)[$targ];
+}
+
+sub pp_refgen {
+ my $self = shift;
+ my $op = shift;
+ my $kid = $op->first;
+ if ($kid->ppaddr eq "pp_null") {
+ $kid = $kid->first;
+ if ($kid->ppaddr eq "pp_anonlist" || $kid->ppaddr eq "pp_anonhash") {
+ my($pre, $post) = @{{"pp_anonlist" => ["[","]"],
+ "pp_anonhash" => ["{","}"]}->{$kid->ppaddr}};
+ my($expr, @exprs);
+ $kid = $kid->first->sibling; # skip pushmark
+ for (; !null($kid); $kid = $kid->sibling) {
+ $expr = $self->deparse($kid);
+ push @exprs, $expr;
+ }
+ return $pre . join(", ", @exprs) . $post;
+ } elsif (!null($kid->sibling) and
+ $kid->sibling->ppaddr eq "pp_anoncode") {
+ return "sub " .
+ $self->deparse_sub($self->padval($kid->sibling->targ));
+ }
+ }
+ $self->unop($op, "\\");
+}
+
+sub pp_srefgen { pp_refgen(@_) }
+
+sub pp_readline {
+ my $self = shift;
+ my $op = shift;
+ my $kid = $op->first;
+ $kid = $kid->first if $kid->ppaddr eq "pp_rv2gv"; # <$fh>
+ if ($kid->ppaddr eq "pp_rv2gv") {
+ $kid = $kid->first;
+ }
+ return "<" . $self->deparse($kid) . ">";
+}
+
+sub loopex {
+ my $self = shift;
+ my ($op, $name) = @_;
+ my $kid;
+ if (class($op) eq "PVOP") {
+ $kid = " " . $op->pv;
+ } elsif (class($op) eq "BASEOP") {
+ $kid = "";
+ } elsif (class($op) eq "UNOP") {
+ $kid = "(" . $self->deparse($op->first) . ")";
+ }
+ return "$name$kid";
+}
+
+sub pp_last { loopex(@_, "last") }
+sub pp_next { loopex(@_, "next") }
+sub pp_redo { loopex(@_, "redo") }
+sub pp_goto { loopex(@_, "goto") }
+sub pp_dump { loopex(@_, "dump") }
+
+sub ftst {
+ my $self = shift;
+ my($op, $name) = @_;
+ my $kid;
+ if (class($op) eq "UNOP") {
+ $kid = $op->first;
+ $kid = "(" . $self->deparse($kid) . ")";
+ } elsif (class($op) eq "GVOP") {
+ $kid = "(" . $self->pp_gv($op) . ")";
+ } else { # I don't think baseop filetests ever survive ck_ftst, but...
+ $kid = "";
+ }
+ return "$name$kid";
+}
+
+sub pp_lstat { ftst(@_, "lstat") }
+sub pp_stat { ftst(@_, "stat") }
+sub pp_ftrread { ftst(@_, "-R") }
+sub pp_ftrwrite { ftst(@_, "-W") }
+sub pp_ftrexec { ftst(@_, "-X") }
+sub pp_fteread { ftst(@_, "-r") }
+sub pp_ftewrite { ftst(@_, "-r") }
+sub pp_fteexec { ftst(@_, "-r") }
+sub pp_ftis { ftst(@_, "-e") }
+sub pp_fteowned { ftst(@_, "-O") }
+sub pp_ftrowned { ftst(@_, "-o") }
+sub pp_ftzero { ftst(@_, "-z") }
+sub pp_ftsize { ftst(@_, "-s") }
+sub pp_ftmtime { ftst(@_, "-M") }
+sub pp_ftatime { ftst(@_, "-A") }
+sub pp_ftctime { ftst(@_, "-C") }
+sub pp_ftsock { ftst(@_, "-S") }
+sub pp_ftchr { ftst(@_, "-c") }
+sub pp_ftblk { ftst(@_, "-b") }
+sub pp_ftfile { ftst(@_, "-f") }
+sub pp_ftdir { ftst(@_, "-d") }
+sub pp_ftpipe { ftst(@_, "-p") }
+sub pp_ftlink { ftst(@_, "-l") }
+sub pp_ftsuid { ftst(@_, "-u") }
+sub pp_ftsgid { ftst(@_, "-g") }
+sub pp_ftsvtx { ftst(@_, "-k") }
+sub pp_fttty { ftst(@_, "-t") }
+sub pp_fttext { ftst(@_, "-T") }
+sub pp_ftbinary { ftst(@_, "-B") }
+
sub SWAP_CHILDREN () { 1 }
+sub ASSIGN () { 2 } # has OP= variant
+
+sub OPf_STACKED () { 64 }
sub binop {
- my ($op, $opname, $flags) = @_;
+ my $self = shift;
+ my ($op, $opname, $flags) = (@_, 0);
my $left = $op->first;
my $right = $op->last;
+ my $eq = ($op->flags & OPf_STACKED && $flags & ASSIGN) ? "=" : "";
if ($flags & SWAP_CHILDREN) {
($left, $right) = ($right, $left);
}
- warn sprintf("binop deparsing first %s\n", peekop($op->first)) if $debug;
- $left = deparse($left);
- warn sprintf("binop deparsing last %s\n", peekop($op->last)) if $debug;
- $right = deparse($right);
+ $left = $self->deparse($left);
+ $right = $self->deparse($right);
+ return "($left $opname$eq $right)";
+}
+
+sub pp_add { binop(@_, "+", ASSIGN) }
+sub pp_multiply { binop(@_, "*", ASSIGN) }
+sub pp_subtract { binop(@_, "-", ASSIGN) }
+sub pp_divide { binop(@_, "/", ASSIGN) }
+sub pp_modulo { binop(@_, "%", ASSIGN) }
+sub pp_i_add { binop(@_, "+", ASSIGN) }
+sub pp_i_multiply { binop(@_, "*", ASSIGN) }
+sub pp_i_subtract { binop(@_, "-", ASSIGN) }
+sub pp_i_divide { binop(@_, "/", ASSIGN) }
+sub pp_i_modulo { binop(@_, "%", ASSIGN) }
+sub pp_pow { binop(@_, "**", ASSIGN) }
+
+sub pp_left_shift { binop(@_, "<<", ASSIGN) }
+sub pp_right_shift { binop(@_, ">>", ASSIGN) }
+sub pp_bit_and { binop(@_, "&", ASSIGN) }
+sub pp_bit_or { binop(@_, "|", ASSIGN) }
+sub pp_bit_xor { binop(@_, "^", ASSIGN) }
+
+sub pp_eq { binop(@_, "==") }
+sub pp_ne { binop(@_, "!=") }
+sub pp_lt { binop(@_, "<") }
+sub pp_gt { binop(@_, ">") }
+sub pp_ge { binop(@_, ">=") }
+sub pp_le { binop(@_, "<=") }
+sub pp_ncmp { binop(@_, "<=>") }
+sub pp_i_eq { binop(@_, "==") }
+sub pp_i_ne { binop(@_, "!=") }
+sub pp_i_lt { binop(@_, "<") }
+sub pp_i_gt { binop(@_, ">") }
+sub pp_i_ge { binop(@_, ">=") }
+sub pp_i_le { binop(@_, "<=") }
+sub pp_i_ncmp { binop(@_, "<=>") }
+
+sub pp_seq { binop(@_, "eq") }
+sub pp_sne { binop(@_, "ne") }
+sub pp_slt { binop(@_, "lt") }
+sub pp_sgt { binop(@_, "gt") }
+sub pp_sge { binop(@_, "ge") }
+sub pp_sle { binop(@_, "le") }
+sub pp_scmp { binop(@_, "cmp") }
+
+sub pp_sassign { binop(@_, "=", SWAP_CHILDREN) }
+sub pp_aassign { binop(@_, "=", SWAP_CHILDREN) }
+
+# `.' is special because concats-of-concats are optimized to save copying
+# by making all but the first concat stacked. The effect is as if the
+# programmer had written `($a . $b) .= $c', except legal.
+sub pp_concat {
+ my $self = shift;
+ my $op = shift;
+ my $left = $op->first;
+ my $right = $op->last;
+ my $eq = "";
+ if ($op->flags & OPf_STACKED and $op->first->ppaddr ne "pp_concat") {
+ $eq = "=";
+ }
+ $left = $self->deparse($left);
+ $right = $self->deparse($right);
+ return "($left .$eq $right)";
+}
+
+# `x' is weird when the left arg is a list
+sub pp_repeat {
+ my $self = shift;
+ my $op = shift;
+ my $left = $op->first;
+ my $right = $op->last;
+ my $eq = ($op->flags & OPf_STACKED) ? "=" : "";
+ 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);
+ }
+ $right = $kid;
+ $left = "(" . join(", ", @exprs). ")";
+ } else {
+ $left = $self->deparse($left);
+ }
+ $right = $self->deparse($right);
+ return "($left x$eq $right)";
+}
+
+sub range {
+ my $self = shift;
+ my ($op, $type) = @_;
+ my $left = $op->first;
+ my $right = $left->sibling;
+ $left = $self->deparse($left);
+ $right = $self->deparse($right);
+ return "($left " . $type . " $right)";
+}
+
+sub pp_flop {
+ my $self = shift;
+ my $op = shift;
+ my $flip = $op->first;
+ my $type = ($flip->flags & OPf_SPECIAL) ? "..." : "..";
+ return $self->range($flip->first, $type);
+}
+
+# one-line while/until is handled in pp_leave
+
+sub logop {
+ my $self = shift;
+ my ($op, $opname, $blockname) = @_;
+ my $left = $op->first;
+ my $right = $op->first->sibling;
+ $left = $self->deparse($left);
+ my $scope = is_scope($right);
+ $right = $self->deparse($right);
+ if ($scope) {
+ return "$blockname ($left) {\n\t$right\n\b}";
+ } else {
+ return "($left $opname $right)";
+ }
+}
+
+sub pp_and { logop(@_, "&&", "if") }
+sub pp_or { logop(@_, "||", "unless") }
+sub pp_xor { logop(@_, "xor", "n/a") }
+
+sub logassignop {
+ my $self = shift;
+ my ($op, $opname) = @_;
+ my $left = $op->first;
+ my $right = $op->first->sibling->first; # skip sassign
+ $left = $self->deparse($left);
+ $right = $self->deparse($right);
return "($left $opname $right)";
}
-sub pp_add { binop($_[0], "+") }
-sub pp_multiply { binop($_[0], "*") }
-sub pp_subtract { binop($_[0], "-") }
-sub pp_divide { binop($_[0], "/") }
-sub pp_modulo { binop($_[0], "%") }
-sub pp_eq { binop($_[0], "==") }
-sub pp_ne { binop($_[0], "!=") }
-sub pp_lt { binop($_[0], "<") }
-sub pp_gt { binop($_[0], ">") }
-sub pp_ge { binop($_[0], ">=") }
+sub pp_andassign { logassignop(@_, "&&=") }
+sub pp_orassign { logassignop(@_, "||=") }
+
+sub listop {
+ my $self = shift;
+ my($op, $name) = @_;
+ my($kid, $expr, @exprs);
+ for ($kid = $op->first->sibling; !null($kid); $kid = $kid->sibling) {
+ $expr = $self->deparse($kid);
+ push @exprs, $expr;
+ }
+ return "$name(" . join(", ", @exprs) . ")";
+}
-sub pp_sassign { binop($_[0], "=", SWAP_CHILDREN) }
+sub pp_bless { listop(@_, "bless") }
+sub pp_atan2 { listop(@_, "atan2") }
+sub pp_substr { maybe_local(@_, listop(@_, "substr")) }
+sub pp_vec { maybe_local(@_, listop(@_, "vec")) }
+sub pp_index { listop(@_, "index") }
+sub pp_rindex { listop(@_, "rindex") }
+sub pp_sprintf { listop(@_, "sprintf") }
+sub pp_formline { listop(@_, "formline") } # see also deparse_format
+sub pp_crypt { listop(@_, "crypt") }
+sub pp_unpack { listop(@_, "unpack") }
+sub pp_pack { listop(@_, "pack") }
+sub pp_join { listop(@_, "join") }
+sub pp_splice { listop(@_, "splice") }
+sub pp_push { listop(@_, "push") }
+sub pp_unshift { listop(@_, "unshift") }
+sub pp_reverse { listop(@_, "reverse") }
+sub pp_warn { listop(@_, "warn") }
+sub pp_die { listop(@_, "die") }
+sub pp_return { listop(@_, "return") }
+sub pp_open { listop(@_, "open") }
+sub pp_pipe_op { listop(@_, "pipe") }
+sub pp_tie { listop(@_, "tie") }
+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_truncate { listop(@_, "truncate") }
+sub pp_fcntl { listop(@_, "fcntl") }
+sub pp_ioctl { listop(@_, "ioctl") }
+sub pp_flock { listop(@_, "flock") }
+sub pp_socket { listop(@_, "socket") }
+sub pp_sockpair { listop(@_, "sockpair") }
+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 { listop(@_, "chown") }
+sub pp_unlink { listop(@_, "unlink") }
+sub pp_chmod { listop(@_, "chmod") }
+sub pp_utime { listop(@_, "utime") }
+sub pp_rename { listop(@_, "rename") }
+sub pp_link { listop(@_, "link") }
+sub pp_symlink { listop(@_, "symlink") }
+sub pp_mkdir { listop(@_, "mkdir") }
+sub pp_open_dir { listop(@_, "opendir") }
+sub pp_seekdir { listop(@_, "seekdir") }
+sub pp_waitpid { listop(@_, "waitpid") }
+sub pp_system { listop(@_, "system") }
+sub pp_exec { listop(@_, "exec") }
+sub pp_kill { listop(@_, "kill") }
+sub pp_setpgrp { listop(@_, "setpgrp") }
+sub pp_getpriority { listop(@_, "getpriority") }
+sub pp_setpriority { 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 = shift;
+ my $text = $self->dq($op->first->sibling); # skip pushmark
+ if ($text =~ /^\$?(\w|::|\`)+$/ # could look like a readline
+ or $text =~ /[<>]/) {
+ return 'glob(' . single_delim('qq', '"', $text) . ')';
+ } else {
+ return '<' . $text . '>';
+ }
+}
+
+sub indirop {
+ my $self = shift;
+ my($op, $name) = (@_, 0);
+ my($expr, @exprs);
+ 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) . "}";
+ } else {
+ $indir = $self->deparse($indir);
+ }
+ $indir = $indir . " ";
+ $kid = $kid->sibling;
+ }
+ for (; !null($kid); $kid = $kid->sibling) {
+ $expr = $self->deparse($kid);
+ push @exprs, $expr;
+ }
+ return "$name($indir" . join(", ", @exprs) . ")";
+}
+
+sub pp_prtf { indirop(@_, "printf") }
+sub pp_print { indirop(@_, "print") }
+sub pp_sort { indirop(@_, "sort") }
+
+sub mapop {
+ my $self = shift;
+ my($op, $name) = @_;
+ my($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) . "} ";
+ } else {
+ $code = $self->deparse($code) . ", ";
+ }
+ $kid = $kid->sibling;
+ for (; !null($kid); $kid = $kid->sibling) {
+ $expr = $self->deparse($kid);
+ push @exprs, $expr if $expr;
+ }
+ return "$name($code" . join(", ", @exprs) . ")";
+}
+
+sub pp_mapwhile { mapop(@_, "map") }
+sub pp_grepwhile { mapop(@_, "grep") }
+
+sub pp_list {
+ my $self = shift;
+ my $op = shift;
+ my($expr, @exprs);
+ my $kid = $op->first->sibling; # skip pushmark
+ my $lop;
+ my $local = "either"; # could be local(...) or my(...)
+ for ($lop = $kid; !null($lop); $lop = $lop->sibling) {
+ # This assumes that no other private flags equal 128, and that
+ # OPs that store things other than flags in their op_private,
+ # like OP_AELEMFAST, won't be immediate children of a list.
+ unless ($lop->private & OPp_LVAL_INTRO or $lop->ppaddr eq "pp_undef")
+ {
+ $local = ""; # or not
+ last;
+ }
+ if ($lop->ppaddr =~ /^pp_pad[ash]v$/) { # my()
+ ($local = "", last) if $local eq "local";
+ $local = "my";
+ } elsif ($lop->ppaddr ne "pp_undef") { # local()
+ ($local = "", last) if $local eq "my";
+ $local = "local";
+ }
+ }
+ $local = "" if $local eq "either"; # no point if it's all undefs
+ for (; !null($kid); $kid = $kid->sibling) {
+ if ($local) {
+ if (class($kid) eq "UNOP" and $kid->first->ppaddr eq "pp_gvsv") {
+ $lop = $kid->first;
+ } else {
+ $lop = $kid;
+ }
+ $self->{'avoid_local'}{$$lop}++;
+ $expr = $self->deparse($kid);
+ delete $self->{'avoid_local'}{$$lop};
+ } else {
+ $expr = $self->deparse($kid);
+ }
+ push @exprs, $expr;
+ }
+ return "$local(" . join(", ", @exprs) . ")";
+}
+
+sub pp_cond_expr {
+ my $self = shift;
+ my $op = shift;
+ my $cond = $op->first;
+ my $true = $cond->sibling;
+ my $false = $true->sibling;
+ my $braces = 0;
+ $cond = $self->deparse($cond);
+ $braces = 1 if is_scope($true) or is_scope($false);
+ $true = $self->deparse($true);
+ if ($false->ppaddr eq "pp_lineseq") { # braces w/o scope => elsif
+ my $head = "if ($cond) {\n\t$true\n\b}";
+ my @elsifs;
+ while (!null($false) and $false->ppaddr eq "pp_lineseq") {
+ my $newop = $false->first->sibling->first;
+ my $newcond = $newop->first;
+ my $newtrue = $newcond->sibling;
+ $false = $newtrue->sibling; # last in chain is OP_AND => no else
+ $newcond = $self->deparse($newcond);
+ $newtrue = $self->deparse($newtrue);
+ push @elsifs, "elsif ($newcond) {\n\t$newtrue\n\b}";
+ }
+ if (!null($false)) {
+ $false = "\nelse {\n\t" . $self->deparse($false) . "\n\b}";
+ } else {
+ $false = "";
+ }
+ return $head . join("\n", "", @elsifs) . $false;
+ }
+ $false = $self->deparse($false);
+ if ($braces) {
+ return "if ($cond) {\n\t$true\n\b}\nelse {\n\t$false\n\b}";
+ } else {
+ return "($cond ? $true : $false)";
+ }
+}
+
+sub pp_leaveloop {
+ my $self = shift;
+ my $op = shift;
+ my $enter = $op->first;
+ my $kid = $enter->sibling;
+ local($self->{'curstash'}) = $self->{'curstash'};
+ my $head = "";
+ if ($kid->ppaddr eq "pp_lineseq") { # bare or infinite loop
+ if (is_state $kid->last) { # infinite
+ $head = "for (;;) "; # shorter than while (1)
+ }
+ } elsif ($enter->ppaddr eq "pp_enteriter") { # foreach
+ my $ary = $enter->first->sibling; # first was pushmark
+ my $var = $ary->sibling;
+ $ary = $self->deparse($ary);
+ if (null $var) {
+ $var = $self->pp_padsv($enter);
+ if ($self->padname_sv($enter->targ)->IVX ==
+ $kid->first->first->sibling->last->cop_seq)
+ {
+ # If the scope of this variable closes at the last
+ # statement of the loop, it must have been declared here.
+ $var = "my " . $var;
+ }
+ } elsif ($var->ppaddr eq "pp_rv2gv") {
+ $var = $self->pp_rv2sv($var);
+ } elsif ($var->ppaddr eq "pp_gv") {
+ $var = "\$" . $self->deparse($var);
+ }
+ $head = "foreach $var $ary ";
+ $kid = $kid->first->first->sibling; # skip OP_AND and OP_ITER
+ } elsif ($kid->ppaddr eq "pp_null") { # while/until
+ $kid = $kid->first;
+ my $name = {"pp_and" => "while", "pp_or" => "until"}
+ ->{$kid->ppaddr};
+ $head = "$name (" . $self->deparse($kid->first) . ") ";
+ $kid = $kid->first->sibling;
+ }
+ # The third-to-last kid is the continue block if the pointer used
+ # by `next BLOCK' points to its nulled-out nextstate, which is its
+ # first or second kid depending on whether the block was optimized
+ # to a OP_SCOPE.
+ my $cont = $kid;
+ unless ($kid->ppaddr eq "pp_stub") { # empty bare loop
+ $cont = $kid->first;
+ unless (null $cont->sibling->sibling) {
+ while (!null($cont->sibling->sibling->sibling)) {
+ $cont = $cont->sibling;
+ }
+ }
+ }
+ if (is_scope($cont)
+ and $ {$enter->nextop} == $ {$cont->first}
+ || $ {$enter->nextop} == $ {$cont->first->sibling})
+ {
+ my $state = $kid->first;
+ my($expr, @exprs);
+ for (; $$state != $$cont; $state = $state->sibling) {
+ $expr = "";
+ if (is_state $state) {
+ $expr = $self->deparse($state);
+ $state = $state->sibling;
+ last if null $kid;
+ }
+ $expr .= $self->deparse($state);
+ push @exprs, $expr if $expr;
+ }
+ $kid = join(";\n", @exprs);
+ $cont = " continue {\n\t" . $self->deparse($cont) . "\n\b}\n";
+ } else {
+ $cont = "";
+ $kid = $self->deparse($kid);
+ }
+ return $head . "{\n\t" . $kid . "\n\b}" . $cont;
+}
+
+sub pp_leavetry {
+ my $self = shift;
+ return "eval {\n\t" . $self->pp_leave($_[0]) . "\n\b}";
+}
+
+sub OP_CONST () { 5 }
+sub OP_STRINGIFY () { 65 }
sub pp_null {
+ my $self = shift;
my $op = shift;
- warn sprintf("Skipping null op %s\n", peekop($op)) if $debug;
- return $op->first;
+ if (class($op) eq "OP") {
+ return "'???'" if $op->targ == OP_CONST; # old value is lost
+ } elsif ($op->first->ppaddr eq "pp_pushmark") {
+ return $self->pp_list($op);
+ } elsif ($op->first->ppaddr eq "pp_enter") {
+ return $self->pp_leave($op);
+ } elsif ($op->targ == OP_STRINGIFY) {
+ return $self->dquote($op);
+ } elsif (!null($op->first->sibling) and
+ $op->first->sibling->ppaddr eq "pp_readline" and
+ $op->first->sibling->flags & OPf_STACKED) {
+ return "(" . $self->deparse($op->first) . " = "
+ . $self->deparse($op->first->sibling) . ")";
+ } elsif (!null($op->first->sibling) and
+ $op->first->sibling->ppaddr eq "pp_trans" and
+ $op->first->sibling->flags & OPf_STACKED) {
+ return "(" . $self->deparse($op->first) . " =~ "
+ . $self->deparse($op->first->sibling) . ")";
+ } else {
+ return $self->deparse($op->first);
+ }
}
-sub pp_const {
+sub padname {
+ my $self = shift;
+ my $targ = shift;
+ my $str = $self->padname_sv($targ)->PV;
+ return padname_fix($str);
+}
+
+sub padany {
+ my $self = shift;
+ my $op = shift;
+ return substr($self->padname($op->targ), 1); # skip $/@/%
+}
+
+sub pp_padsv {
+ my $self = shift;
+ my $op = shift;
+ return $self->maybe_my($op, $self->padname($op->targ));
+}
+
+sub pp_padav { pp_padsv(@_) }
+sub pp_padhv { pp_padsv(@_) }
+
+sub pp_gvsv {
+ my $self = shift;
+ my $op = shift;
+ return $self->maybe_local($op, "\$" . $self->gv_name($op->gv));
+}
+
+sub pp_gv {
+ my $self = shift;
+ my $op = shift;
+ return $self->gv_name($op->gv);
+}
+
+sub pp_aelemfast {
+ my $self = shift;
+ my $op = shift;
+ my $gv = $op->gv;
+ return "\$" . $self->gv_name($gv) . "[" . $op->private . "]";
+}
+
+sub rv2x {
+ my $self = shift;
+ my($op, $type) = @_;
+ my $kid = $op->first;
+ my $scope = is_scope($kid);
+ $kid = $self->deparse($kid);
+ return $type . ($scope ? "{$kid}" : $kid);
+}
+
+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 $op = shift;
+ if ($op->first->ppaddr eq "pp_padav") {
+ return $self->maybe_local($op, '$#' . $self->padany($op->first));
+ } else {
+ return $self->maybe_local($op, $self->rv2x($op->first, '$#'));
+ }
+}
+
+# skip down to the old, ex-rv2cv
+sub pp_rv2cv { $_[0]->rv2x($_[1]->first->first->sibling, "&") }
+
+sub pp_rv2av {
+ my $self = shift;
+ my $op = shift;
+ my $kid = $op->first;
+ if ($kid->ppaddr eq "pp_const") { # constant list
+ my $av = $kid->sv;
+ return "(" . join(", ", map(const($_), $av->ARRAY)) . ")";
+ } else {
+ return $self->maybe_local($op, $self->rv2x($op, "\@"));
+ }
+ }
+
+
+sub elem {
+ my $self = shift;
+ my ($op, $left, $right, $padname) = @_;
+ my($array, $idx) = ($op->first, $op->first->sibling);
+ unless ($array->ppaddr eq $padname) { # Maybe this has been fixed
+ $array = $array->first; # skip rv2av (or ex-rv2av in _53+)
+ }
+ if ($array->ppaddr eq $padname) {
+ $array = $self->padany($array);
+ } elsif (is_scope($array)) { # ${expr}[0]
+ $array = "{" . $self->deparse($array) . "}";
+ } elsif (is_scalar $array) { # $x[0], $$x[0], ...
+ $array = $self->deparse($array);
+ } else {
+ # $x[20][3]{hi} or expr->[20]
+ my $arrow;
+ $arrow = "->" if $array->ppaddr !~ /^pp_[ah]elem$/;
+ return $self->deparse($array) . $arrow .
+ $left . $self->deparse($idx) . $right;
+ }
+ $idx = $self->deparse($idx);
+ return "\$" . $array . $left . $idx . $right;
+}
+
+sub pp_aelem { maybe_local(@_, elem(@_, "[", "]", "pp_padav")) }
+sub pp_helem { maybe_local(@_, elem(@_, "{", "}", "pp_padhv")) }
+
+sub pp_gelem {
+ my $self = shift;
+ my $op = shift;
+ my($glob, $part) = ($op->first, $op->last);
+ $glob = $glob->first; # skip rv2gv
+ $glob = $glob->first if $glob->ppaddr eq "pp_rv2gv"; # this one's a bug
+ my $scope = (is_scope($glob));
+ $glob = $self->deparse($glob);
+ $part = $self->deparse($part);
+ return "*" . ($scope ? "{$glob}" : $glob) . "{$part}";
+}
+
+sub slice {
+ my $self = shift;
+ my ($op, $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->ppaddr eq $regname or $array->ppaddr eq "pp_null";
+ if (is_scope($array)) {
+ $array = "{" . $self->deparse($array) . "}";
+ } elsif ($array->ppaddr eq $padname) {
+ $array = $self->padany($array);
+ } else {
+ $array = $self->deparse($array);
+ }
+ $kid = $op->first->sibling; # skip pushmark
+ if ($kid->ppaddr eq "pp_list") {
+ $kid = $kid->first->sibling; # skip list, pushmark
+ for (; !null $kid; $kid = $kid->sibling) {
+ push @elems, $self->deparse($kid);
+ }
+ $list = join(", ", @elems);
+ } else {
+ $list = $self->deparse($kid);
+ }
+ return "\@" . $array . $left . $list . $right;
+}
+
+sub pp_aslice { maybe_local(@_, slice(@_, "[", "]",
+ "pp_rv2av", "pp_padav")) }
+sub pp_hslice { maybe_local(@_, slice(@_, "{", "}",
+ "pp_rv2hv", "pp_padhv")) }
+
+sub pp_lslice {
+ my $self = shift;
+ my $op = shift;
+ my $idx = $op->first;
+ my $list = $op->last;
+ my(@elems, $kid);
+ $list = $self->deparse($list); # will always have parens
+ $idx = $self->deparse($idx);
+ return $list . "[$idx]";
+}
+
+sub OPpENTERSUB_AMPER () { 8 }
+
+sub OPf_WANT () { 3 }
+sub OPf_WANT_VOID () { 1 }
+sub OPf_WANT_SCALAR () { 2 }
+sub OPf_WANT_LIST () { 2 }
+
+sub want_scalar {
+ my $op = shift;
+ return ($op->flags & OPf_WANT) == OPf_WANT_SCALAR;
+}
+
+sub pp_entersub {
+ my $self = shift;
my $op = shift;
- my $sv = $op->sv;
- if (class($sv) eq "IV") {
+ my $prefix = "";
+ my $amper = "";
+ my $proto = undef;
+ my($kid, $args, @exprs);
+ if ($op->flags & OPf_SPECIAL) {
+ $prefix = "do ";
+ } elsif ($op->private & OPpENTERSUB_AMPER) {
+ $amper = "&";
+ }
+ if (not null $op->first->sibling) {
+ $kid = $op->first->sibling; # skip pushmark
+ my $obj = $self->deparse($kid);
+ $kid = $kid->sibling;
+ for (; not null $kid->sibling; $kid = $kid->sibling) {
+ push @exprs, $self->deparse($kid);
+ }
+ my $meth = $kid->first;
+ if ($meth->ppaddr eq "pp_const") {
+ $meth = $meth->sv->PV; # needs to be bare
+ } else {
+ $meth = $self->deparse($meth);
+ }
+ $prefix = "";
+ $args = join(", ", @exprs);
+ $kid = $obj . "->" . $meth;
+ } else {
+ $kid = $op->first;
+ $kid = $kid->first->sibling; # skip ex-list, pushmark
+ for (; not null $kid->sibling; $kid = $kid->sibling) {
+ push @exprs, $kid;
+ }
+ if (is_scope($kid)) {
+ $kid = "{" . $self->deparse($kid) . "}";
+ } elsif ($kid->first->ppaddr eq "pp_gv") {
+ my $gv = $kid->first->gv;
+ if (class($gv->CV) ne "SPECIAL") {
+ $proto = $gv->CV->PV if $gv->CV->FLAGS & SVf_POK;
+ }
+ $kid = $self->deparse($kid);
+ } elsif (is_scalar $kid->first) {
+ $amper = "&";
+ $kid = $self->deparse($kid);
+ } else {
+ $prefix = "";
+ $kid = $self->deparse($kid) . "->";
+ }
+ if (defined $proto and not $amper) {
+ my($arg, $real);
+ my $doneok = 0;
+ my @args = @exprs;
+ my @reals;
+ $proto =~ s/([^\\]|^)([@%])(.*)$/$1$2/;
+ while ($proto) {
+ $proto =~ s/^ *([\\]?[\$\@&%*]|;)//;
+ my $chr = $1;
+ if ($chr eq "") {
+ undef $proto if @args;
+ } elsif ($chr eq ";") {
+ $doneok = 1;
+ } elsif ($chr eq "@" or $chr eq "%") {
+ push @reals, map($self->deparse($_), @args);
+ @args = ();
+ } else {
+ $arg = shift @args;
+ undef $proto, last unless $arg;
+ if ($chr eq "\$") {
+ if (want_scalar $arg) {
+ push @reals, $self->deparse($arg);
+ } else {
+ undef $proto;
+ }
+ } elsif ($chr eq "&") {
+ if ($arg->ppaddr =~ /pp_(s?refgen|undef)/) {
+ push @reals, $self->deparse($arg);
+ } else {
+ undef $proto;
+ }
+ } elsif ($chr eq "*") {
+ if ($arg->ppaddr =~ /^pp_s?refgen$/
+ and $arg->first->first->ppaddr eq "pp_rv2gv")
+ {
+ $real = $arg->first->first; # skip refgen, null
+ if ($real->first->ppaddr eq "pp_gv") {
+ push @reals, $self->deparse($real);
+ } else {
+ push @reals, $self->deparse($real->first);
+ }
+ } else {
+ undef $proto;
+ }
+ } elsif (substr($chr, 0, 1) eq "\\") {
+ $chr = substr($chr, 1);
+ if ($arg->ppaddr =~ /^pp_s?refgen$/ and
+ !null($real = $arg->first) and
+ ($chr eq "\$" && is_scalar($real->first)
+ or ($chr eq "\@"
+ && $real->first->sibling->ppaddr
+ =~ /^pp_(rv2|pad)av$/)
+ or ($chr eq "%"
+ && $real->first->sibling->ppaddr
+ =~ /^pp_(rv2|pad)hv$/)
+ #or ($chr eq "&" # This doesn't work
+ # && $real->first->ppaddr eq "pp_rv2cv")
+ or ($chr eq "*"
+ && $real->first->ppaddr eq "pp_rv2gv")))
+ {
+ push @reals, $self->deparse($real);
+ } else {
+ undef $proto;
+ }
+ }
+ }
+ }
+ undef $proto if $proto and !$doneok;
+ undef $proto if @args;
+ $args = join(", ", @reals);
+ $amper = "";
+ unless (defined $proto) {
+ $amper = "&";
+ $args = join(", ", map($self->deparse($_), @exprs));
+ }
+ } else {
+ $args = join(", ", map($self->deparse($_), @exprs));
+ }
+ }
+ if ($op->flags & OPf_STACKED) {
+ return $prefix . $amper . $kid . "(" . $args . ")";
+ } else {
+ return $prefix . $amper. $kid;
+ }
+}
+
+sub pp_enterwrite { unop(@_, "write") }
+
+# escape things that cause interpolation in double quotes,
+# but not character escapes
+sub uninterp {
+ my($str) = @_;
+ $str =~ s/(^|[^\\])([\$\@]|\\[uUlLQE])/$1\\$2/;
+ return $str;
+}
+
+# character escapes, but not delimiters that might need to be escaped
+sub escape_str { # ASCII
+ my($str) = @_;
+ $str =~ s/\\/\\\\/g;
+ $str =~ s/\a/\\a/g;
+# $str =~ s/\cH/\\b/g; # \b means someting 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])/'\\c' . chr(ord('@') + ord($1))/ge;
+ $str =~ s/([\0\033-\037\177-\377])/'\\' . sprintf("%03o", ord($1))/ge;
+ return $str;
+}
+
+sub balanced_delim {
+ my($str) = @_;
+ my @str = split //, $str;
+ my($ar, $open, $close, $fail, $c, $cnt);
+ for $ar (['[',']'], ['(',')'], ['<','>'], ['{','}']) {
+ ($open, $close) = @$ar;
+ $fail = 0; $cnt = 0;
+ for $c (@str) {
+ if ($c eq $open) {
+ $cnt++;
+ } elsif ($c eq $close) {
+ $cnt--;
+ if ($cnt < 0) {
+ $fail = 1;
+ last;
+ }
+ }
+ }
+ $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 index($str, $default) == -1;
+ my($succeed, $delim);
+ ($succeed, $str) = balanced_delim($str);
+ return "$q$str" if $succeed;
+ for $delim ('/', '"', '#') {
+ return "$q$delim" . $str . $delim if index($str, $delim) == -1;
+ }
+ $str =~ s/$default/\\$default/g;
+ return "$default$str$default";
+}
+
+sub SVf_IOK () {0x10000}
+sub SVf_NOK () {0x20000}
+sub SVf_ROK () {0x80000}
+
+sub const {
+ my $sv = shift;
+ if (class($sv) eq "SPECIAL") {
+ return ('undef', '1', '+0')[$$sv-1];
+ } elsif ($sv->FLAGS & SVf_IOK) {
return $sv->IV;
- } elsif (class($sv) eq "NV") {
+ } elsif ($sv->FLAGS & SVf_NOK) {
+ return "0.0" unless $sv->NV;
return $sv->NV;
+ } elsif ($sv->FLAGS & SVf_ROK) {
+ return "\\(" . const($sv->RV) . ")"; # constant folded
} else {
- return $sv->PV;
+ my $str = $sv->PV;
+ if ($str =~ /[^ -~]/) { # ASCII
+ return single_delim("qq", '"', uninterp(escape_str($str)));
+ } else {
+ $str =~ s/\\/\\\\/g;
+ return single_delim("q", "'", $str);
+ }
}
}
-sub pp_gvsv {
+sub pp_const {
+ my $self = shift;
my $op = shift;
- my $gv = $op->gv;
- my $stash = $gv->STASH->NAME;
- if ($stash eq "main") {
- $stash = "";
+# if ($op->private & OPp_CONST_BARE) { # trouble with `=>' autoquoting
+# return $op->sv->PV;
+# }
+ return const($op->sv);
+}
+
+sub dq {
+ my $self = shift;
+ my $op = shift;
+ my $type = $op->ppaddr;
+ if ($type eq "pp_const") {
+ return uninterp(escape_str($op->sv->PV));
+ } elsif ($type eq "pp_concat") {
+ return $self->dq($op->first) . $self->dq($op->last);
+ } elsif ($type eq "pp_uc") {
+ return '\U' . $self->dq($op->first->sibling) . '\E';
+ } elsif ($type eq "pp_lc") {
+ return '\L' . $self->dq($op->first->sibling) . '\E';
+ } elsif ($type eq "pp_ucfirst") {
+ return '\u' . $self->dq($op->first->sibling);
+ } elsif ($type eq "pp_lcfirst") {
+ return '\l' . $self->dq($op->first->sibling);
+ } elsif ($type eq "pp_quotemeta") {
+ return '\Q' . $self->dq($op->first->sibling) . '\E';
+ } elsif ($type eq "pp_join") {
+ return $self->deparse($op->last); # was join($", @ary)
} else {
- $stash = $stash . "::";
+ return $self->deparse($op);
+ }
+}
+
+sub pp_backtick {
+ my $self = shift;
+ my $op = shift;
+ # skip pushmark
+ return single_delim("qx", '`', $self->dq($op->first->sibling));
+}
+
+sub dquote {
+ my $self = shift;
+ my $op = shift;
+ # skip ex-stringify, pushmark
+ return single_delim("qq", '"', $self->dq($op->first->sibling));
+}
+
+# OP_STRINGIFY is a listop, but it only ever has one arg (?)
+sub pp_stringify { 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/$to/";
+ }
+}
+
+sub pchr { # ASCII
+ my($n) = @_;
+ if ($n == ord '\\') {
+ return '\\\\';
+ } elsif ($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", $n);
+ }
+}
+
+sub collapse {
+ my(@chars) = @_;
+ my($c, $str, $tr);
+ for ($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 and $chars[$c + 1] == $chars[$c] + 1; $c++) {}
+ $str .= "-";
+ $str .= pchr($chars[$c]);
+ }
+ }
+ return $str;
+}
+
+sub OPpTRANS_SQUASH () { 16 }
+sub OPpTRANS_DELETE () { 32 }
+sub OPpTRANS_COMPLEMENT () { 64 }
+
+sub pp_trans {
+ my $self = shift;
+ my $op = shift;
+ my(@table) = unpack("s256", $op->pv);
+ my($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 < 256; $c++) {
+ $tr = $table[$c];
+ if ($tr >= 0) {
+ push @from, $c; push @to, $tr;
+ } elsif ($tr == -2) {
+ push @delfrom, $c;
+ }
+ }
+ my $flags;
+ @from = (@from, @delfrom);
+ if ($op->private & OPpTRANS_COMPLEMENT) {
+ $flags .= "c";
+ my @newfrom = ();
+ my %from;
+ @from{@from} = (1) x @from;
+ for ($c = 0; $c < 256; $c++) {
+ push @newfrom, $c unless $from{$c};
+ }
+ @from = @newfrom;
+ }
+ if ($op->private & OPpTRANS_DELETE) {
+ $flags .= "d";
+ } else {
+ pop @to while $#to and $to[$#to] == $to[$#to -1];
+ }
+ $flags .= "s" if $op->private & OPpTRANS_SQUASH;
+ my($from, $to);
+ $from = collapse(@from);
+ $to = collapse(@to);
+ $from .= "-" if $delhyphen;
+ return "tr" . double_delim($from, $to) . $flags;
+}
+
+# Like dq(), but different
+sub re_dq {
+ my $self = shift;
+ my $op = shift;
+ my $type = $op->ppaddr;
+ if ($type eq "pp_const") {
+ return uninterp($op->sv->PV);
+ } elsif ($type eq "pp_concat") {
+ return $self->re_dq($op->first) . $self->re_dq($op->last);
+ } elsif ($type eq "pp_uc") {
+ return '\U' . $self->re_dq($op->first->sibling) . '\E';
+ } elsif ($type eq "pp_lc") {
+ return '\L' . $self->re_dq($op->first->sibling) . '\E';
+ } elsif ($type eq "pp_ucfirst") {
+ return '\u' . $self->re_dq($op->first->sibling);
+ } elsif ($type eq "pp_lcfirst") {
+ return '\l' . $self->re_dq($op->first->sibling);
+ } elsif ($type eq "pp_quotemeta") {
+ return '\Q' . $self->re_dq($op->first->sibling) . '\E';
+ } elsif ($type eq "pp_join") {
+ return $self->deparse($op->last); # was join($", @ary)
+ } else {
+ return $self->deparse($op);
+ }
+}
+
+sub pp_regcomp {
+ my $self = shift;
+ my $op = shift;
+ my $kid = $op->first;
+ $kid = $kid->first if $kid->ppaddr eq "pp_regcmaybe";
+ return $self->re_dq($kid);
+}
+
+sub OPp_RUNTIME () { 64 }
+
+sub PMf_ONCE () { 0x2 }
+sub PMf_SKIPWHITE () { 0x10 }
+sub PMf_FOLD () { 0x20 }
+sub PMf_CONST () { 0x40 }
+sub PMf_KEEP () { 0x80 }
+sub PMf_GLOBAL () { 0x100 }
+sub PMf_CONTINUE () { 0x200 }
+sub PMf_EVAL () { 0x400 }
+sub PMf_MULTILINE () { 0x1000 }
+sub PMf_SINGLELINE () { 0x2000 }
+sub PMf_LOCALE () { 0x4000 }
+sub PMf_EXTENDED () { 0x8000 }
+
+# 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 pp_match {
+ my $self = shift;
+ my $op = shift;
+ my $kid = $op->first;
+ my ($pre, $post, $re) = ("", "", "");
+ if ($op->flags & OPf_STACKED) {
+ $pre = "(" . $self->deparse($kid) . " =~ ";
+ $post = ")";
+ $kid = $kid->sibling;
+ }
+ if (null $kid) {
+ $re = uninterp(escape_str($op->precomp));
+ } else {
+ $re = $self->deparse($kid);
+ }
+ my $flags = "";
+ $flags .= "c" if $op->pmflags & PMf_CONTINUE;
+ $flags .= "g" if $op->pmflags & PMf_GLOBAL;
+ $flags .= "i" if $op->pmflags & PMf_FOLD;
+ $flags .= "m" if $op->pmflags & PMf_MULTILINE;
+ $flags .= "o" if $op->pmflags & PMf_KEEP;
+ $flags .= "s" if $op->pmflags & PMf_SINGLELINE;
+ $flags .= "x" if $op->pmflags & PMf_EXTENDED;
+ $flags = $matchwords{$flags} if $matchwords{$flags};
+ if ($op->pmflags & PMf_ONCE) { # only one kind of delimiter works here
+ $re =~ s/\?/\\?/g;
+ return "$pre?$re?$flags$post";
+ }
+ return $pre . single_delim("m", "/", $re) . "$flags$post";
+}
+
+sub pp_pushre { pp_match(@_) }
+
+sub pp_split {
+ my $self = shift;
+ my $op = shift;
+ my($kid, @exprs, $ary, $expr);
+ $kid = $op->first;
+ if ($ {$kid->pmreplroot}) {
+ $ary = '@' . $self->gv_name($kid->pmreplroot);
+ }
+ for (; !null($kid); $kid = $kid->sibling) {
+ push @exprs, $self->deparse($kid);
+ }
+ $expr = "split(" . join(", ", @exprs) . ")";
+ if ($ary) {
+ return "(" . $ary . " = " . $expr . ")";
+ } 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');
+
+sub pp_subst {
+ my $self = shift;
+ my $op = shift;
+ my $kid = $op->first;
+ my($pre, $post, $re, $repl) = ("", "", "", "");
+ if ($op->flags & OPf_STACKED) {
+ $pre = "(" . $self->deparse($kid) . " =~ ";
+ $post = ")";
+ $kid = $kid->sibling;
+ }
+ my $flags = "";
+ if (null($op->pmreplroot)) {
+ $repl = $self->dq($kid);
+ $kid = $kid->sibling;
+ } else {
+ $repl = $op->pmreplroot->first; # skip substcont
+ while ($repl->ppaddr eq "pp_entereval") {
+ $repl = $repl->first;
+ $flags .= "e";
+ }
+ $repl = $self->deparse($repl);
+ }
+ if (null $kid) {
+ $re = uninterp(escape_str($op->precomp));
+ } else {
+ $re = $self->deparse($kid);
}
- return sprintf('$%s%s', $stash, $gv->NAME);
+ $flags .= "e" if $op->pmflags & PMf_EVAL;
+ $flags .= "g" if $op->pmflags & PMf_GLOBAL;
+ $flags .= "i" if $op->pmflags & PMf_FOLD;
+ $flags .= "m" if $op->pmflags & PMf_MULTILINE;
+ $flags .= "o" if $op->pmflags & PMf_KEEP;
+ $flags .= "s" if $op->pmflags & PMf_SINGLELINE;
+ $flags .= "x" if $op->pmflags & PMf_EXTENDED;
+ $flags = $substwords{$flags} if $substwords{$flags};
+ return $pre . "s". double_delim($re, $repl) . "$flags$post";
}
1;
projects / platform / upstream / perl.git / commitdiff