2671 lines
75 KiB
Perl
2671 lines
75 KiB
Perl
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# B::Deparse.pm
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# Copyright (c) 1998 Stephen McCamant. All rights reserved.
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# This module is free software; you can redistribute and/or modify
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# it under the same terms as Perl itself.
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# This is based on the module of the same name by Malcolm Beattie,
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# but essentially none of his code remains.
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package B::Deparse;
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use Carp 'cluck';
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use B qw(class main_root main_start main_cv svref_2object);
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$VERSION = 0.56;
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use strict;
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# Changes between 0.50 and 0.51:
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# - fixed nulled leave with live enter in sort { }
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# - fixed reference constants (\"str")
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# - handle empty programs gracefully
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# - handle infinte loops (for (;;) {}, while (1) {})
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# - differentiate between `for my $x ...' and `my $x; for $x ...'
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# - various minor cleanups
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# - moved globals into an object
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# - added `-u', like B::C
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# - package declarations using cop_stash
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# - subs, formats and code sorted by cop_seq
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# Changes between 0.51 and 0.52:
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# - added pp_threadsv (special variables under USE_THREADS)
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# - added documentation
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# Changes between 0.52 and 0.53
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# - many changes adding precedence contexts and associativity
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# - added `-p' and `-s' output style options
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# - various other minor fixes
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# Changes between 0.53 and 0.54
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# - added support for new `for (1..100)' optimization,
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# thanks to Gisle Aas
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# Changes between 0.54 and 0.55
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# - added support for new qr// construct
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# - added support for new pp_regcreset OP
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# Changes between 0.55 and 0.56
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# - tested on base/*.t, cmd/*.t, comp/*.t, io/*.t
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# - fixed $# on non-lexicals broken in last big rewrite
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# - added temporary fix for change in opcode of OP_STRINGIFY
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# - fixed problem in 0.54's for() patch in `for (@ary)'
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# - fixed precedence in conditional of ?:
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# - tweaked list paren elimination in `my($x) = @_'
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# - made continue-block detection trickier wrt. null ops
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# - fixed various prototype problems in pp_entersub
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# - added support for sub prototypes that never get GVs
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# - added unquoting for special filehandle first arg in truncate
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# - print doubled rv2gv (a bug) as `*{*GV}' instead of illegal `**GV'
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# - added semicolons at the ends of blocks
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# - added -l `#line' declaration option -- fixes cmd/subval.t 27,28
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# Todo:
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# - {} around variables in strings ("${var}letters")
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# base/lex.t 25-27
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# comp/term.t 11
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# - generate symbolic constants directly from core source
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# - left/right context
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# - avoid semis in one-statement blocks
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# - associativity of &&=, ||=, ?:
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# - ',' => '=>' (auto-unquote?)
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# - break long lines ("\r" as discretionary break?)
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# - include values of variables (e.g. set in BEGIN)
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# - coordinate with Data::Dumper (both directions? see previous)
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# - version using op_next instead of op_first/sibling?
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# - avoid string copies (pass arrays, one big join?)
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# - auto-apply `-u'?
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# - while{} with one-statement continue => for(; XXX; XXX) {}?
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# - -uPackage:: descend recursively?
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# - here-docs?
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# - <DATA>?
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# Tests that will always fail:
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# comp/redef.t -- all (redefinition happens at compile time)
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# Object fields (were globals):
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#
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# avoid_local:
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# (local($a), local($b)) and local($a, $b) have the same internal
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# representation but the short form looks better. We notice we can
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# use a large-scale local when checking the list, but need to prevent
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# individual locals too. This hash holds the addresses of OPs that
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# have already had their local-ness accounted for. The same thing
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# is done with my().
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#
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# curcv:
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# CV for current sub (or main program) being deparsed
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#
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# curstash:
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# name of the current package for deparsed code
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#
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# subs_todo:
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# array of [cop_seq, GV, is_format?] for subs and formats we still
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# want to deparse
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#
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# protos_todo:
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# as above, but [name, prototype] for subs that never got a GV
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#
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# subs_done, forms_done:
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# keys are addresses of GVs for subs and formats we've already
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# deparsed (or at least put into subs_todo)
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#
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# parens: -p
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# linenums: -l
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# cuddle: ` ' or `\n', depending on -sC
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# A little explanation of how precedence contexts and associativity
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# work:
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#
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# deparse() calls each per-op subroutine with an argument $cx (short
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# for context, but not the same as the cx* in the perl core), which is
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# a number describing the op's parents in terms of precedence, whether
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# they're inside an expression or at statement level, etc. (see
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# chart below). When ops with children call deparse on them, they pass
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# along their precedence. Fractional values are used to implement
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# associativity (`($x + $y) + $z' => `$x + $y + $y') and related
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# parentheses hacks. The major disadvantage of this scheme is that
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# it doesn't know about right sides and left sides, so say if you
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# assign a listop to a variable, it can't tell it's allowed to leave
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# the parens off the listop.
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# Precedences:
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# 26 [TODO] inside interpolation context ("")
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# 25 left terms and list operators (leftward)
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# 24 left ->
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# 23 nonassoc ++ --
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# 22 right **
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# 21 right ! ~ \ and unary + and -
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# 20 left =~ !~
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# 19 left * / % x
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# 18 left + - .
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# 17 left << >>
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# 16 nonassoc named unary operators
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# 15 nonassoc < > <= >= lt gt le ge
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# 14 nonassoc == != <=> eq ne cmp
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# 13 left &
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# 12 left | ^
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# 11 left &&
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# 10 left ||
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# 9 nonassoc .. ...
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# 8 right ?:
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# 7 right = += -= *= etc.
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# 6 left , =>
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# 5 nonassoc list operators (rightward)
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# 4 right not
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# 3 left and
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# 2 left or xor
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# 1 statement modifiers
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# 0 statement level
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# Nonprinting characters with special meaning:
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# \cS - steal parens (see maybe_parens_unop)
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# \n - newline and indent
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# \t - increase indent
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# \b - decrease indent (`outdent')
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# \f - flush left (no indent)
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# \cK - kill following semicolon, if any
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sub null {
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my $op = shift;
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return class($op) eq "NULL";
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}
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sub todo {
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my $self = shift;
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my($gv, $cv, $is_form) = @_;
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my $seq;
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if (!null($cv->START) and is_state($cv->START)) {
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$seq = $cv->START->cop_seq;
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} else {
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$seq = 0;
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}
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push @{$self->{'subs_todo'}}, [$seq, $gv, $is_form];
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}
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sub next_todo {
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my $self = shift;
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my $ent = shift @{$self->{'subs_todo'}};
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my $name = $self->gv_name($ent->[1]);
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if ($ent->[2]) {
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return "format $name =\n"
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. $self->deparse_format($ent->[1]->FORM). "\n";
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} else {
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return "sub $name " .
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$self->deparse_sub($ent->[1]->CV);
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}
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}
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sub OPf_KIDS () { 4 }
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sub walk_tree {
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my($op, $sub) = @_;
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$sub->($op);
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if ($op->flags & OPf_KIDS) {
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my $kid;
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for ($kid = $op->first; not null $kid; $kid = $kid->sibling) {
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walk_tree($kid, $sub);
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}
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}
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}
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sub walk_sub {
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my $self = shift;
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my $cv = shift;
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my $op = $cv->ROOT;
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$op = shift if null $op;
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return if !$op or null $op;
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walk_tree($op, sub {
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my $op = shift;
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if ($op->ppaddr eq "pp_gv") {
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if ($op->next->ppaddr eq "pp_entersub") {
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next if $self->{'subs_done'}{$ {$op->gv}}++;
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next if class($op->gv->CV) eq "SPECIAL";
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$self->todo($op->gv, $op->gv->CV, 0);
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$self->walk_sub($op->gv->CV);
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} elsif ($op->next->ppaddr eq "pp_enterwrite"
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or ($op->next->ppaddr eq "pp_rv2gv"
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and $op->next->next->ppaddr eq "pp_enterwrite")) {
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next if $self->{'forms_done'}{$ {$op->gv}}++;
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next if class($op->gv->FORM) eq "SPECIAL";
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$self->todo($op->gv, $op->gv->FORM, 1);
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$self->walk_sub($op->gv->FORM);
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}
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}
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});
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}
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sub stash_subs {
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my $self = shift;
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my $pack = shift;
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my(%stash, @ret);
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{ no strict 'refs'; %stash = svref_2object(\%{$pack . "::"})->ARRAY }
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if ($pack eq "main") {
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$pack = "";
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} else {
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$pack = $pack . "::";
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}
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my($key, $val);
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while (($key, $val) = each %stash) {
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my $class = class($val);
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if ($class eq "PV") {
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# Just a prototype
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push @{$self->{'protos_todo'}}, [$pack . $key, $val->PV];
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} elsif ($class eq "IV") {
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# Just a name
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push @{$self->{'protos_todo'}}, [$pack . $key, undef];
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} elsif ($class eq "GV") {
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if (class($val->CV) ne "SPECIAL") {
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next if $self->{'subs_done'}{$$val}++;
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$self->todo($val, $val->CV, 0);
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$self->walk_sub($val->CV);
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}
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if (class($val->FORM) ne "SPECIAL") {
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next if $self->{'forms_done'}{$$val}++;
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$self->todo($val, $val->FORM, 1);
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$self->walk_sub($val->FORM);
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}
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}
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}
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}
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sub print_protos {
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my $self = shift;
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my $ar;
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my @ret;
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foreach $ar (@{$self->{'protos_todo'}}) {
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my $proto = (defined $ar->[1] ? " (". $ar->[1] . ")" : "");
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push @ret, "sub " . $ar->[0] . "$proto;\n";
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}
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delete $self->{'protos_todo'};
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return @ret;
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}
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sub style_opts {
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my $self = shift;
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my $opts = shift;
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my $opt;
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while (length($opt = substr($opts, 0, 1))) {
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if ($opt eq "C") {
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$self->{'cuddle'} = " ";
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}
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$opts = substr($opts, 1);
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}
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}
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sub compile {
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my(@args) = @_;
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return sub {
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my $self = bless {};
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my $arg;
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$self->{'subs_todo'} = [];
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$self->stash_subs("main");
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$self->{'curcv'} = main_cv;
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$self->{'curstash'} = "main";
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$self->{'cuddle'} = "\n";
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while ($arg = shift @args) {
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if (substr($arg, 0, 2) eq "-u") {
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$self->stash_subs(substr($arg, 2));
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} elsif ($arg eq "-p") {
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$self->{'parens'} = 1;
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} elsif ($arg eq "-l") {
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$self->{'linenums'} = 1;
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} elsif (substr($arg, 0, 2) eq "-s") {
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$self->style_opts(substr $arg, 2);
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}
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}
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$self->walk_sub(main_cv, main_start);
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print $self->print_protos;
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@{$self->{'subs_todo'}} =
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sort {$a->[0] <=> $b->[0]} @{$self->{'subs_todo'}};
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print indent($self->deparse(main_root, 0)), "\n" unless null main_root;
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my @text;
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while (scalar(@{$self->{'subs_todo'}})) {
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push @text, $self->next_todo;
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}
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print indent(join("", @text)), "\n" if @text;
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}
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}
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sub deparse {
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my $self = shift;
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my($op, $cx) = @_;
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# cluck if class($op) eq "NULL";
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my $meth = $op->ppaddr;
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return $self->$meth($op, $cx);
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}
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sub indent {
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my $txt = shift;
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my @lines = split(/\n/, $txt);
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my $leader = "";
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my $line;
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for $line (@lines) {
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if (substr($line, 0, 1) eq "\t") {
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$leader = $leader . " ";
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$line = substr($line, 1);
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} elsif (substr($line, 0, 1) eq "\b") {
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$leader = substr($leader, 0, length($leader) - 4);
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$line = substr($line, 1);
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}
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if (substr($line, 0, 1) eq "\f") {
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$line = substr($line, 1); # no indent
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} else {
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$line = $leader . $line;
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}
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$line =~ s/\cK;?//g;
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}
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return join("\n", @lines);
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}
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sub SVf_POK () {0x40000}
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sub deparse_sub {
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my $self = shift;
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my $cv = shift;
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|
|
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, 0) . "\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, 0);
|
||
|
|
}
|
||
|
|
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;
|
||
|
|
return $op->ppaddr eq "pp_leave" || $op->ppaddr eq "pp_scope"
|
||
|
|
|| $op->ppaddr eq "pp_lineseq"
|
||
|
|
|| ($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 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 $self->{'parens'}) {
|
||
|
|
return "$name(" . $self->deparse($kid, 1) . ")";
|
||
|
|
} else {
|
||
|
|
$kid = $self->deparse($kid, 16);
|
||
|
|
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 OPp_LVAL_INTRO () { 128 }
|
||
|
|
|
||
|
|
sub maybe_local {
|
||
|
|
my $self = shift;
|
||
|
|
my($op, $cx, $text) = @_;
|
||
|
|
if ($op->private & OPp_LVAL_INTRO and not $self->{'avoid_local'}{$$op}) {
|
||
|
|
return $self->maybe_parens_func("local", $text, $cx, 16);
|
||
|
|
} else {
|
||
|
|
return $text;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
sub padname_sv {
|
||
|
|
my $self = shift;
|
||
|
|
my $targ = shift;
|
||
|
|
return (($self->{'curcv'}->PADLIST->ARRAY)[0]->ARRAY)[$targ];
|
||
|
|
}
|
||
|
|
|
||
|
|
sub maybe_my {
|
||
|
|
my $self = shift;
|
||
|
|
my($op, $cx, $text) = @_;
|
||
|
|
if ($op->private & OPp_LVAL_INTRO and not $self->{'avoid_local'}{$$op}) {
|
||
|
|
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
|
||
|
|
# pp_rcatline -- does not exist
|
||
|
|
|
||
|
|
sub pp_enter { # see also leave
|
||
|
|
cluck "unexpected OP_ENTER";
|
||
|
|
return "XXX";
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_pushmark { # see also list
|
||
|
|
cluck "unexpected OP_PUSHMARK";
|
||
|
|
return "XXX";
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_leavesub { # see also deparse_sub
|
||
|
|
cluck "unexpected OP_LEAVESUB";
|
||
|
|
return "XXX";
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_leavewrite { # see also deparse_format
|
||
|
|
cluck "unexpected OP_LEAVEWRITE";
|
||
|
|
return "XXX";
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_method { # see also entersub
|
||
|
|
cluck "unexpected OP_METHOD";
|
||
|
|
return "XXX";
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_regcmaybe { # see also regcomp
|
||
|
|
cluck "unexpected OP_REGCMAYBE";
|
||
|
|
return "XXX";
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_regcreset { # see also regcomp
|
||
|
|
cluck "unexpected OP_REGCRESET";
|
||
|
|
return "XXX";
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_substcont { # see also subst
|
||
|
|
cluck "unexpected OP_SUBSTCONT";
|
||
|
|
return "XXX";
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_grepstart { # see also grepwhile
|
||
|
|
cluck "unexpected OP_GREPSTART";
|
||
|
|
return "XXX";
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_mapstart { # see also mapwhile
|
||
|
|
cluck "unexpected OP_MAPSTART";
|
||
|
|
return "XXX";
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_flip { # see also flop
|
||
|
|
cluck "unexpected OP_FLIP";
|
||
|
|
return "XXX";
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_iter { # see also leaveloop
|
||
|
|
cluck "unexpected OP_ITER";
|
||
|
|
return "XXX";
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_enteriter { # see also leaveloop
|
||
|
|
cluck "unexpected OP_ENTERITER";
|
||
|
|
return "XXX";
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_enterloop { # see also leaveloop
|
||
|
|
cluck "unexpected OP_ENTERLOOP";
|
||
|
|
return "XXX";
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_leaveeval { # see also entereval
|
||
|
|
cluck "unexpected OP_LEAVEEVAL";
|
||
|
|
return "XXX";
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_entertry { # see also leavetry
|
||
|
|
cluck "unexpected OP_ENTERTRY";
|
||
|
|
return "XXX";
|
||
|
|
}
|
||
|
|
|
||
|
|
# leave and scope/lineseq should probably share code
|
||
|
|
sub pp_leave {
|
||
|
|
my $self = shift;
|
||
|
|
my($op, $cx) = @_;
|
||
|
|
my ($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, 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 $cond";
|
||
|
|
}
|
||
|
|
for (; !null($kid); $kid = $kid->sibling) {
|
||
|
|
$expr = "";
|
||
|
|
if (is_state $kid) {
|
||
|
|
$expr = $self->deparse($kid, 0);
|
||
|
|
$kid = $kid->sibling;
|
||
|
|
last if null $kid;
|
||
|
|
}
|
||
|
|
$expr .= $self->deparse($kid, 0);
|
||
|
|
push @exprs, $expr if $expr;
|
||
|
|
}
|
||
|
|
if ($cx > 0) { # inside an expression
|
||
|
|
return "do { " . join(";\n", @exprs) . " }";
|
||
|
|
} else {
|
||
|
|
return join(";\n", @exprs) . ";";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_scope {
|
||
|
|
my $self = shift;
|
||
|
|
my($op, $cx) = @_;
|
||
|
|
my ($kid, $expr);
|
||
|
|
my @exprs;
|
||
|
|
for ($kid = $op->first; !null($kid); $kid = $kid->sibling) {
|
||
|
|
$expr = "";
|
||
|
|
if (is_state $kid) {
|
||
|
|
$expr = $self->deparse($kid, 0);
|
||
|
|
$kid = $kid->sibling;
|
||
|
|
last if null $kid;
|
||
|
|
}
|
||
|
|
$expr .= $self->deparse($kid, 0);
|
||
|
|
push @exprs, $expr if $expr;
|
||
|
|
}
|
||
|
|
if ($cx > 0) { # inside an expression, (a do {} while for lineseq)
|
||
|
|
return "do { " . join(";\n", @exprs) . " }";
|
||
|
|
} else {
|
||
|
|
return join(";\n", @exprs) . ";";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_lineseq { pp_scope(@_) }
|
||
|
|
|
||
|
|
# 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}
|
||
|
|
or $name =~ /^[^A-Za-z_]/)
|
||
|
|
{
|
||
|
|
$stash = "";
|
||
|
|
} else {
|
||
|
|
$stash = $stash . "::";
|
||
|
|
}
|
||
|
|
if ($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, $cx) = @_;
|
||
|
|
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'} = $stash;
|
||
|
|
}
|
||
|
|
if ($self->{'linenums'}) {
|
||
|
|
push @text, "\f#line " . $op->line .
|
||
|
|
' "' . substr($op->filegv->NAME, 2), qq'"\n';
|
||
|
|
}
|
||
|
|
return join("", @text);
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_dbstate { pp_nextstate(@_) }
|
||
|
|
|
||
|
|
sub pp_unstack { return "" } # see also leaveloop
|
||
|
|
|
||
|
|
sub baseop {
|
||
|
|
my $self = shift;
|
||
|
|
my($op, $cx, $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 }
|
||
|
|
|
||
|
|
# 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" : "$name$kid",
|
||
|
|
$cx, $prec);
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_preinc { pfixop(@_, "++", 23) }
|
||
|
|
sub pp_predec { pfixop(@_, "--", 23) }
|
||
|
|
sub pp_postinc { pfixop(@_, "++", 23, POSTFIX) }
|
||
|
|
sub pp_postdec { pfixop(@_, "--", 23, POSTFIX) }
|
||
|
|
sub pp_i_preinc { pfixop(@_, "++", 23) }
|
||
|
|
sub pp_i_predec { pfixop(@_, "--", 23) }
|
||
|
|
sub pp_i_postinc { pfixop(@_, "++", 23, POSTFIX) }
|
||
|
|
sub pp_i_postdec { pfixop(@_, "--", 23, POSTFIX) }
|
||
|
|
sub pp_complement { pfixop(@_, "~", 21) }
|
||
|
|
|
||
|
|
sub pp_negate {
|
||
|
|
my $self = shift;
|
||
|
|
my($op, $cx) = @_;
|
||
|
|
if ($op->first->ppaddr =~ /^pp_(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) {
|
||
|
|
$self->pfixop($op, $cx, "not ", 4);
|
||
|
|
} else {
|
||
|
|
$self->pfixop($op, $cx, "!", 21);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
sub OPf_SPECIAL () { 128 }
|
||
|
|
|
||
|
|
sub unop {
|
||
|
|
my $self = shift;
|
||
|
|
my($op, $cx, $name, $prec, $flags) = (@_, 0, 0);
|
||
|
|
my $kid;
|
||
|
|
if ($op->flags & OPf_KIDS) {
|
||
|
|
$kid = $op->first;
|
||
|
|
return $self->maybe_parens_unop($name, $kid, $cx);
|
||
|
|
} else {
|
||
|
|
return $name . ($op->flags & OPf_SPECIAL ? "()" : "");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
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_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, $cx) = @_;
|
||
|
|
return $self->maybe_parens_func("exists", $self->pp_helem($op->first, 16),
|
||
|
|
$cx, 16);
|
||
|
|
}
|
||
|
|
|
||
|
|
sub OPpSLICE () { 64 }
|
||
|
|
|
||
|
|
sub pp_delete {
|
||
|
|
my $self = shift;
|
||
|
|
my($op, $cx) = @_;
|
||
|
|
my $arg;
|
||
|
|
if ($op->private & OPpSLICE) {
|
||
|
|
return $self->maybe_parens_func("delete",
|
||
|
|
$self->pp_hslice($op->first, 16),
|
||
|
|
$cx, 16);
|
||
|
|
} else {
|
||
|
|
return $self->maybe_parens_func("delete",
|
||
|
|
$self->pp_helem($op->first, 16),
|
||
|
|
$cx, 16);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
sub OPp_CONST_BARE () { 64 }
|
||
|
|
|
||
|
|
sub pp_require {
|
||
|
|
my $self = shift;
|
||
|
|
my($op, $cx) = @_;
|
||
|
|
if (class($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, $cx, "require");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_scalar {
|
||
|
|
my $self = shift;
|
||
|
|
my($op, $cv) = @_;
|
||
|
|
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->ARRAY)[1]->ARRAY)[$targ];
|
||
|
|
}
|
||
|
|
|
||
|
|
sub OPf_REF () { 16 }
|
||
|
|
|
||
|
|
sub pp_refgen {
|
||
|
|
my $self = shift;
|
||
|
|
my($op, $cx) = @_;
|
||
|
|
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, 6);
|
||
|
|
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($kid->sibling->targ));
|
||
|
|
} elsif ($kid->ppaddr eq "pp_pushmark"
|
||
|
|
and $kid->sibling->ppaddr =~ /^pp_(pad|rv2)[ah]v$/
|
||
|
|
and not $kid->sibling->flags & OPf_REF) {
|
||
|
|
# The @a in \(@a) isn't in ref context, but only when the
|
||
|
|
# parens are there.
|
||
|
|
return "\\(" . $self->deparse($kid->sibling, 1) . ")";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
$self->pfixop($op, $cx, "\\", 20);
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_srefgen { pp_refgen(@_) }
|
||
|
|
|
||
|
|
sub pp_readline {
|
||
|
|
my $self = shift;
|
||
|
|
my($op, $cx) = @_;
|
||
|
|
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, 1) . ">";
|
||
|
|
}
|
||
|
|
|
||
|
|
sub loopex {
|
||
|
|
my $self = shift;
|
||
|
|
my ($op, $cx, $name) = @_;
|
||
|
|
if (class($op) eq "PVOP") {
|
||
|
|
return "$name " . $op->pv;
|
||
|
|
} elsif (class($op) eq "OP") {
|
||
|
|
return $name;
|
||
|
|
} elsif (class($op) eq "UNOP") {
|
||
|
|
# Note -- loop exits are actually exempt from the
|
||
|
|
# looks-like-a-func rule, but a few extra parens won't hurt
|
||
|
|
return $self->maybe_parens_unop($name, $op->first, $cx);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
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, $cx, $name) = @_;
|
||
|
|
if (class($op) eq "UNOP") {
|
||
|
|
# Genuine `-X' filetests are exempt from the LLAFR, but not
|
||
|
|
# l?stat(); for the sake of clarity, give'em all parens
|
||
|
|
return $self->maybe_parens_unop($name, $op->first, $cx);
|
||
|
|
} elsif (class($op) eq "GVOP") {
|
||
|
|
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(@_, "-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 }
|
||
|
|
|
||
|
|
my(%left, %right);
|
||
|
|
|
||
|
|
sub assoc_class {
|
||
|
|
my $op = shift;
|
||
|
|
my $name = $op->ppaddr;
|
||
|
|
if ($name eq "pp_concat" and $op->first->ppaddr eq "pp_concat") {
|
||
|
|
# avoid spurious `=' -- see comment in pp_concat
|
||
|
|
return "pp_concat";
|
||
|
|
}
|
||
|
|
if ($name eq "pp_null" and class($op) eq "UNOP"
|
||
|
|
and $op->first->ppaddr =~ /^pp_(and|x?or)$/
|
||
|
|
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 = ('pp_multiply' => 19, 'pp_i_multiply' => 19,
|
||
|
|
'pp_divide' => 19, 'pp_i_divide' => 19,
|
||
|
|
'pp_modulo' => 19, 'pp_i_modulo' => 19,
|
||
|
|
'pp_repeat' => 19,
|
||
|
|
'pp_add' => 18, 'pp_i_add' => 18,
|
||
|
|
'pp_subtract' => 18, 'pp_i_subtract' => 18,
|
||
|
|
'pp_concat' => 18,
|
||
|
|
'pp_left_shift' => 17, 'pp_right_shift' => 17,
|
||
|
|
'pp_bit_and' => 13,
|
||
|
|
'pp_bit_or' => 12, 'pp_bit_xor' => 12,
|
||
|
|
'pp_and' => 3,
|
||
|
|
'pp_or' => 2, 'pp_xor' => 2,
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
sub deparse_binop_left {
|
||
|
|
my $self = shift;
|
||
|
|
my($op, $left, $prec) = @_;
|
||
|
|
if ($left{assoc_class($op)}
|
||
|
|
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 = ('pp_pow' => 22,
|
||
|
|
'pp_sassign=' => 7, 'pp_aassign=' => 7,
|
||
|
|
'pp_multiply=' => 7, 'pp_i_multiply=' => 7,
|
||
|
|
'pp_divide=' => 7, 'pp_i_divide=' => 7,
|
||
|
|
'pp_modulo=' => 7, 'pp_i_modulo=' => 7,
|
||
|
|
'pp_repeat=' => 7,
|
||
|
|
'pp_add=' => 7, 'pp_i_add=' => 7,
|
||
|
|
'pp_subtract=' => 7, 'pp_i_subtract=' => 7,
|
||
|
|
'pp_concat=' => 7,
|
||
|
|
'pp_left_shift=' => 7, 'pp_right_shift=' => 7,
|
||
|
|
'pp_bit_and=' => 7,
|
||
|
|
'pp_bit_or=' => 7, 'pp_bit_xor=' => 7,
|
||
|
|
'pp_andassign' => 7,
|
||
|
|
'pp_orassign' => 7,
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
sub deparse_binop_right {
|
||
|
|
my $self = shift;
|
||
|
|
my($op, $right, $prec) = @_;
|
||
|
|
if ($right{assoc_class($op)}
|
||
|
|
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);
|
||
|
|
$right = $self->deparse_binop_right($op, $right, $prec);
|
||
|
|
return $self->maybe_parens("$left $opname$eq $right", $cx, $prec);
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_add { binop(@_, "+", 18, ASSIGN) }
|
||
|
|
sub pp_multiply { binop(@_, "*", 19, ASSIGN) }
|
||
|
|
sub pp_subtract { binop(@_, "-",18, ASSIGN) }
|
||
|
|
sub pp_divide { binop(@_, "/", 19, ASSIGN) }
|
||
|
|
sub pp_modulo { binop(@_, "%", 19, ASSIGN) }
|
||
|
|
sub pp_i_add { binop(@_, "+", 18, ASSIGN) }
|
||
|
|
sub pp_i_multiply { binop(@_, "*", 19, ASSIGN) }
|
||
|
|
sub pp_i_subtract { binop(@_, "-", 18, ASSIGN) }
|
||
|
|
sub pp_i_divide { binop(@_, "/", 19, ASSIGN) }
|
||
|
|
sub pp_i_modulo { binop(@_, "%", 19, ASSIGN) }
|
||
|
|
sub pp_pow { binop(@_, "**", 22, ASSIGN) }
|
||
|
|
|
||
|
|
sub pp_left_shift { binop(@_, "<<", 17, ASSIGN) }
|
||
|
|
sub pp_right_shift { binop(@_, ">>", 17, ASSIGN) }
|
||
|
|
sub pp_bit_and { binop(@_, "&", 13, ASSIGN) }
|
||
|
|
sub pp_bit_or { binop(@_, "|", 12, ASSIGN) }
|
||
|
|
sub pp_bit_xor { 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) }
|
||
|
|
|
||
|
|
# `.' 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, $cx) = @_;
|
||
|
|
my $left = $op->first;
|
||
|
|
my $right = $op->last;
|
||
|
|
my $eq = "";
|
||
|
|
my $prec = 18;
|
||
|
|
if ($op->flags & OPf_STACKED and $op->first->ppaddr ne "pp_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 == 0 and is_scope($right) and $blockname) { # if ($a) {$b}
|
||
|
|
$left = $self->deparse($left, 1);
|
||
|
|
$right = $self->deparse($right, 0);
|
||
|
|
return "$blockname ($left) {\n\t$right\n\b}\cK";
|
||
|
|
} elsif ($cx == 0 and $blockname and not $self->{'parens'}) { # $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_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 listop {
|
||
|
|
my $self = shift;
|
||
|
|
my($op, $cx, $name) = @_;
|
||
|
|
my(@exprs);
|
||
|
|
my $parens = ($cx >= 5) || $self->{'parens'};
|
||
|
|
my $kid = $op->first->sibling;
|
||
|
|
return $name if null $kid;
|
||
|
|
my $first = $self->deparse($kid, 6);
|
||
|
|
$first = "+$first" if not $parens and substr($first, 0, 1) eq "(";
|
||
|
|
push @exprs, $first;
|
||
|
|
$kid = $kid->sibling;
|
||
|
|
for (; !null($kid); $kid = $kid->sibling) {
|
||
|
|
push @exprs, $self->deparse($kid, 6);
|
||
|
|
}
|
||
|
|
if ($parens) {
|
||
|
|
return "$name(" . join(", ", @exprs) . ")";
|
||
|
|
} else {
|
||
|
|
return "$name " . join(", ", @exprs);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
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") }
|
||
|
|
# Actually, return is exempt from the LLAFR (see examples in this very
|
||
|
|
# module!), but for consistency's sake, ignore that fact
|
||
|
|
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_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, $cx) = @_;
|
||
|
|
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 . '>';
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# 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, $len);
|
||
|
|
if ($op->flags & OPf_SPECIAL) {
|
||
|
|
# $kid is an OP_CONST
|
||
|
|
$fh = $kid->sv->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);
|
||
|
|
if ($parens) {
|
||
|
|
return "truncate($fh, $len)";
|
||
|
|
} else {
|
||
|
|
return "truncate $fh, $len";
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
sub indirop {
|
||
|
|
my $self = shift;
|
||
|
|
my($op, $cx, $name) = @_;
|
||
|
|
my($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, 0) . "}";
|
||
|
|
} else {
|
||
|
|
$indir = $self->deparse($indir, 24);
|
||
|
|
}
|
||
|
|
$indir = $indir . " ";
|
||
|
|
$kid = $kid->sibling;
|
||
|
|
}
|
||
|
|
for (; !null($kid); $kid = $kid->sibling) {
|
||
|
|
$expr = $self->deparse($kid, 6);
|
||
|
|
push @exprs, $expr;
|
||
|
|
}
|
||
|
|
return $self->maybe_parens_func($name,
|
||
|
|
$indir . join(", ", @exprs),
|
||
|
|
$cx, 5);
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_prtf { indirop(@_, "printf") }
|
||
|
|
sub pp_print { indirop(@_, "print") }
|
||
|
|
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, 1) . "} ";
|
||
|
|
} else {
|
||
|
|
$code = $self->deparse($code, 24) . ", ";
|
||
|
|
}
|
||
|
|
$kid = $kid->sibling;
|
||
|
|
for (; !null($kid); $kid = $kid->sibling) {
|
||
|
|
$expr = $self->deparse($kid, 6);
|
||
|
|
push @exprs, $expr if $expr;
|
||
|
|
}
|
||
|
|
return $self->maybe_parens_func($name, $code . join(", ", @exprs), $cx, 5);
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_mapwhile { mapop(@_, "map") }
|
||
|
|
sub pp_grepwhile { mapop(@_, "grep") }
|
||
|
|
|
||
|
|
sub pp_list {
|
||
|
|
my $self = shift;
|
||
|
|
my($op, $cx) = @_;
|
||
|
|
my($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
|
||
|
|
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->ppaddr eq "pp_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 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 == 0 and is_scope($true) and is_scope($false)) {
|
||
|
|
$cond = $self->deparse($cond, 8);
|
||
|
|
$true = $self->deparse($true, 8);
|
||
|
|
$false = $self->deparse($false, 8);
|
||
|
|
return $self->maybe_parens("$cond ? $true : $false", $cx, 8);
|
||
|
|
}
|
||
|
|
$cond = $self->deparse($cond, 1);
|
||
|
|
$true = $self->deparse($true, 0);
|
||
|
|
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, 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;
|
||
|
|
}
|
||
|
|
$false = $self->deparse($false, 0);
|
||
|
|
return "if ($cond) {\n\t$true\n\b}${cuddle}else {\n\t$false\n\b}\cK";
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_leaveloop {
|
||
|
|
my $self = shift;
|
||
|
|
my($op, $cx) = @_;
|
||
|
|
my $enter = $op->first;
|
||
|
|
my $kid = $enter->sibling;
|
||
|
|
local($self->{'curstash'}) = $self->{'curstash'};
|
||
|
|
my $head = "";
|
||
|
|
my $bare = 0;
|
||
|
|
if ($kid->ppaddr eq "pp_lineseq") { # bare or infinite loop
|
||
|
|
if (is_state $kid->last) { # infinite
|
||
|
|
$head = "for (;;) "; # shorter than while (1)
|
||
|
|
} else {
|
||
|
|
$bare = 1;
|
||
|
|
}
|
||
|
|
} elsif ($enter->ppaddr eq "pp_enteriter") { # foreach
|
||
|
|
my $ary = $enter->first->sibling; # first was pushmark
|
||
|
|
my $var = $ary->sibling;
|
||
|
|
if ($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) { # thread special var
|
||
|
|
$var = $self->pp_threadsv($enter, 1);
|
||
|
|
} else { # regular my() variable
|
||
|
|
$var = $self->pp_padsv($enter, 1);
|
||
|
|
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, 1);
|
||
|
|
} elsif ($var->ppaddr eq "pp_gv") {
|
||
|
|
$var = "\$" . $self->deparse($var, 1);
|
||
|
|
}
|
||
|
|
$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, 1) . ") ";
|
||
|
|
$kid = $kid->first->sibling;
|
||
|
|
} elsif ($kid->ppaddr eq "pp_stub") { # bare and empty
|
||
|
|
return "{;}"; # {} could be a hashref
|
||
|
|
}
|
||
|
|
# The third-to-last kid is the continue block if the pointer used
|
||
|
|
# by `next BLOCK' points to its first OP, which happens to be the
|
||
|
|
# the op_next of the head of the _previous_ statement.
|
||
|
|
# Unless it's a bare loop, in which case it's last, since there's
|
||
|
|
# no unstack or extra nextstate.
|
||
|
|
# Except if the previous head isn't null but the first kid is
|
||
|
|
# (because it's a nulled out nextstate in a scope), in which
|
||
|
|
# case the head's next is advanced past the null but the nextop's
|
||
|
|
# isn't, so we need to try nextop->next.
|
||
|
|
my($cont, $precont);
|
||
|
|
if ($bare) {
|
||
|
|
$cont = $kid->first;
|
||
|
|
while (!null($cont->sibling)) {
|
||
|
|
$precont = $cont;
|
||
|
|
$cont = $cont->sibling;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
$cont = $kid->first;
|
||
|
|
while (!null($cont->sibling->sibling->sibling)) {
|
||
|
|
$precont = $cont;
|
||
|
|
$cont = $cont->sibling;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if ($precont and $ {$precont->next} == $ {$enter->nextop}
|
||
|
|
|| $ {$precont->next} == $ {$enter->nextop->next} )
|
||
|
|
{
|
||
|
|
my $state = $kid->first;
|
||
|
|
my $cuddle = $self->{'cuddle'};
|
||
|
|
my($expr, @exprs);
|
||
|
|
for (; $$state != $$cont; $state = $state->sibling) {
|
||
|
|
$expr = "";
|
||
|
|
if (is_state $state) {
|
||
|
|
$expr = $self->deparse($state, 0);
|
||
|
|
$state = $state->sibling;
|
||
|
|
last if null $kid;
|
||
|
|
}
|
||
|
|
$expr .= $self->deparse($state, 0);
|
||
|
|
push @exprs, $expr if $expr;
|
||
|
|
}
|
||
|
|
$kid = join(";\n", @exprs);
|
||
|
|
$cont = $cuddle . "continue {\n\t" .
|
||
|
|
$self->deparse($cont, 0) . "\n\b}\cK";
|
||
|
|
} else {
|
||
|
|
$cont = "\cK";
|
||
|
|
$kid = $self->deparse($kid, 0);
|
||
|
|
}
|
||
|
|
return $head . "{\n\t" . $kid . "\n\b}" . $cont;
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_leavetry {
|
||
|
|
my $self = shift;
|
||
|
|
return "eval {\n\t" . $self->pp_leave(@_) . "\n\b}";
|
||
|
|
}
|
||
|
|
|
||
|
|
sub OP_CONST () { 5 }
|
||
|
|
|
||
|
|
# XXX need a better way to do this
|
||
|
|
sub OP_STRINGIFY () { $] > 5.004_72 ? 67 : 65 }
|
||
|
|
|
||
|
|
sub pp_null {
|
||
|
|
my $self = shift;
|
||
|
|
my($op, $cx) = @_;
|
||
|
|
if (class($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, $cx);
|
||
|
|
} elsif ($op->first->ppaddr eq "pp_enter") {
|
||
|
|
return $self->pp_leave($op, $cx);
|
||
|
|
} elsif ($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 $self->maybe_parens($self->deparse($op->first, 7) . " = "
|
||
|
|
. $self->deparse($op->first->sibling, 7),
|
||
|
|
$cx, 7);
|
||
|
|
} elsif (!null($op->first->sibling) and
|
||
|
|
$op->first->sibling->ppaddr eq "pp_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);
|
||
|
|
} else {
|
||
|
|
return $self->deparse($op->first, $cx);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
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, $cx) = @_;
|
||
|
|
return $self->maybe_my($op, $cx, $self->padname($op->targ));
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_padav { pp_padsv(@_) }
|
||
|
|
sub pp_padhv { pp_padsv(@_) }
|
||
|
|
|
||
|
|
my @threadsv_names;
|
||
|
|
|
||
|
|
BEGIN {
|
||
|
|
@threadsv_names = ("_", "1", "2", "3", "4", "5", "6", "7", "8", "9",
|
||
|
|
"&", "`", "'", "+", "/", ".", ",", "\\", '"', ";",
|
||
|
|
"^", "-", "%", "=", "|", "~", ":", "^A", "^E",
|
||
|
|
"!", "@");
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_threadsv {
|
||
|
|
my $self = shift;
|
||
|
|
my($op, $cx) = @_;
|
||
|
|
return $self->maybe_local($op, $cx, "\$" . $threadsv_names[$op->targ]);
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_gvsv {
|
||
|
|
my $self = shift;
|
||
|
|
my($op, $cx) = @_;
|
||
|
|
return $self->maybe_local($op, $cx, "\$" . $self->gv_name($op->gv));
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_gv {
|
||
|
|
my $self = shift;
|
||
|
|
my($op, $cx) = @_;
|
||
|
|
return $self->gv_name($op->gv);
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_aelemfast {
|
||
|
|
my $self = shift;
|
||
|
|
my($op, $cx) = @_;
|
||
|
|
my $gv = $op->gv;
|
||
|
|
return "\$" . $self->gv_name($gv) . "[" . $op->private . "]";
|
||
|
|
}
|
||
|
|
|
||
|
|
sub rv2x {
|
||
|
|
my $self = shift;
|
||
|
|
my($op, $cx, $type) = @_;
|
||
|
|
my $kid = $op->first;
|
||
|
|
my $str = $self->deparse($kid, 0);
|
||
|
|
return $type . (is_scalar($kid) ? $str : "{$str}");
|
||
|
|
}
|
||
|
|
|
||
|
|
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->ppaddr eq "pp_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 { $_[0]->rv2x($_[1]->first->first->sibling, $_[2], "&") }
|
||
|
|
|
||
|
|
sub pp_rv2av {
|
||
|
|
my $self = shift;
|
||
|
|
my($op, $cx) = @_;
|
||
|
|
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, $cx, $self->rv2x($op, $cx, "\@"));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
sub elem {
|
||
|
|
my $self = shift;
|
||
|
|
my ($op, $cx, $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, 0) . "}";
|
||
|
|
} elsif (is_scalar $array) { # $x[0], $$x[0], ...
|
||
|
|
$array = $self->deparse($array, 24);
|
||
|
|
} else {
|
||
|
|
# $x[20][3]{hi} or expr->[20]
|
||
|
|
my $arrow;
|
||
|
|
$arrow = "->" if $array->ppaddr !~ /^pp_[ah]elem$/;
|
||
|
|
return $self->deparse($array, 24) . $arrow .
|
||
|
|
$left . $self->deparse($idx, 1) . $right;
|
||
|
|
}
|
||
|
|
$idx = $self->deparse($idx, 1);
|
||
|
|
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, $cx) = @_;
|
||
|
|
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, 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->ppaddr eq $regname or $array->ppaddr eq "pp_null";
|
||
|
|
if (is_scope($array)) {
|
||
|
|
$array = "{" . $self->deparse($array, 0) . "}";
|
||
|
|
} elsif ($array->ppaddr eq $padname) {
|
||
|
|
$array = $self->padany($array);
|
||
|
|
} else {
|
||
|
|
$array = $self->deparse($array, 24);
|
||
|
|
}
|
||
|
|
$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, 6);
|
||
|
|
}
|
||
|
|
$list = join(", ", @elems);
|
||
|
|
} else {
|
||
|
|
$list = $self->deparse($kid, 1);
|
||
|
|
}
|
||
|
|
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, $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 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, $cx) = @_;
|
||
|
|
my $prefix = "";
|
||
|
|
my $amper = "";
|
||
|
|
my $proto = undef;
|
||
|
|
my $simple = 0;
|
||
|
|
my($kid, $args, @exprs);
|
||
|
|
if (not null $op->first->sibling) { # method
|
||
|
|
$kid = $op->first->sibling; # skip pushmark
|
||
|
|
my $obj = $self->deparse($kid, 24);
|
||
|
|
$kid = $kid->sibling;
|
||
|
|
for (; not null $kid->sibling; $kid = $kid->sibling) {
|
||
|
|
push @exprs, $self->deparse($kid, 6);
|
||
|
|
}
|
||
|
|
my $meth = $kid->first;
|
||
|
|
if ($meth->ppaddr eq "pp_const") {
|
||
|
|
$meth = $meth->sv->PV; # needs to be bare
|
||
|
|
} else {
|
||
|
|
$meth = $self->deparse($meth, 1);
|
||
|
|
}
|
||
|
|
$args = join(", ", @exprs);
|
||
|
|
$kid = $obj . "->" . $meth;
|
||
|
|
if ($args) {
|
||
|
|
return $kid . "(" . $args . ")"; # parens mandatory
|
||
|
|
} else {
|
||
|
|
return $kid; # toke.c fakes parens
|
||
|
|
}
|
||
|
|
}
|
||
|
|
# else, not a method
|
||
|
|
if ($op->flags & OPf_SPECIAL) {
|
||
|
|
$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;
|
||
|
|
}
|
||
|
|
if (is_scope($kid)) {
|
||
|
|
$amper = "&";
|
||
|
|
$kid = "{" . $self->deparse($kid, 0) . "}";
|
||
|
|
} 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;
|
||
|
|
}
|
||
|
|
$simple = 1;
|
||
|
|
$kid = $self->deparse($kid, 24);
|
||
|
|
} elsif (is_scalar $kid->first) {
|
||
|
|
$amper = "&";
|
||
|
|
$kid = $self->deparse($kid, 24);
|
||
|
|
} else {
|
||
|
|
$prefix = "";
|
||
|
|
$kid = $self->deparse($kid, 24) . "->";
|
||
|
|
}
|
||
|
|
if (defined $proto and not $amper) {
|
||
|
|
my($arg, $real);
|
||
|
|
my $doneok = 0;
|
||
|
|
my @args = @exprs;
|
||
|
|
my @reals;
|
||
|
|
my $p = $proto;
|
||
|
|
$p =~ s/([^\\]|^)([@%])(.*)$/$1$2/;
|
||
|
|
while ($p) {
|
||
|
|
$p =~ 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($_, 6), @args);
|
||
|
|
@args = ();
|
||
|
|
} else {
|
||
|
|
$arg = shift @args;
|
||
|
|
last unless $arg;
|
||
|
|
if ($chr eq "\$") {
|
||
|
|
if (want_scalar $arg) {
|
||
|
|
push @reals, $self->deparse($arg, 6);
|
||
|
|
} else {
|
||
|
|
undef $proto;
|
||
|
|
}
|
||
|
|
} elsif ($chr eq "&") {
|
||
|
|
if ($arg->ppaddr =~ /pp_(s?refgen|undef)/) {
|
||
|
|
push @reals, $self->deparse($arg, 6);
|
||
|
|
} 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, 6);
|
||
|
|
} else {
|
||
|
|
push @reals, $self->deparse($real->first, 6);
|
||
|
|
}
|
||
|
|
} 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, 6);
|
||
|
|
} else {
|
||
|
|
undef $proto;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
undef $proto if $p and !$doneok;
|
||
|
|
undef $proto if @args;
|
||
|
|
$args = join(", ", @reals);
|
||
|
|
$amper = "";
|
||
|
|
unless (defined $proto) {
|
||
|
|
$amper = "&";
|
||
|
|
$args = join(", ", map($self->deparse($_, 6), @exprs));
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
$args = join(", ", map($self->deparse($_, 6), @exprs));
|
||
|
|
}
|
||
|
|
if ($prefix or $amper) {
|
||
|
|
if ($op->flags & OPf_STACKED) {
|
||
|
|
return $prefix . $amper . $kid . "(" . $args . ")";
|
||
|
|
} else {
|
||
|
|
return $prefix . $amper. $kid;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
if (defined $proto and $proto eq "") {
|
||
|
|
return $kid;
|
||
|
|
} elsif ($proto eq "\$") {
|
||
|
|
return $self->maybe_parens_func($kid, $args, $cx, 16);
|
||
|
|
} elsif ($proto or $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/(^|[^\\])([\$\@]|\\[uUlLQE])/$1\\$2/g;
|
||
|
|
return $str;
|
||
|
|
}
|
||
|
|
|
||
|
|
# the same, but treat $|, $), and $ at the end of the string differently
|
||
|
|
sub re_uninterp {
|
||
|
|
my($str) = @_;
|
||
|
|
$str =~ s/(^|[^\\])(\@|\\[uUlLQE])/$1\\$2/g;
|
||
|
|
$str =~ s/(^|[^\\])(\$[^)|])/$1\\$2/g;
|
||
|
|
return $str;
|
||
|
|
}
|
||
|
|
|
||
|
|
# character escapes, but not delimiters that might need to be escaped
|
||
|
|
sub escape_str { # ASCII
|
||
|
|
my($str) = @_;
|
||
|
|
$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;
|
||
|
|
}
|
||
|
|
|
||
|
|
# Don't do this for regexen
|
||
|
|
sub unback {
|
||
|
|
my($str) = @_;
|
||
|
|
$str =~ s/\\/\\\\/g;
|
||
|
|
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 $default and 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;
|
||
|
|
}
|
||
|
|
if ($default) {
|
||
|
|
$str =~ s/$default/\\$default/g;
|
||
|
|
return "$default$str$default";
|
||
|
|
} else {
|
||
|
|
$str =~ s[/][\\/]g;
|
||
|
|
return "$q/$str/";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
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 $sv->IV;
|
||
|
|
} elsif ($sv->FLAGS & SVf_NOK) {
|
||
|
|
return $sv->NV;
|
||
|
|
} elsif ($sv->FLAGS & SVf_ROK) {
|
||
|
|
return "\\(" . const($sv->RV) . ")"; # constant folded
|
||
|
|
} else {
|
||
|
|
my $str = $sv->PV;
|
||
|
|
if ($str =~ /[^ -~]/) { # ASCII
|
||
|
|
return single_delim("qq", '"', uninterp escape_str unback $str);
|
||
|
|
} else {
|
||
|
|
$str =~ s/\\/\\\\/g;
|
||
|
|
return single_delim("q", "'", $str);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_const {
|
||
|
|
my $self = shift;
|
||
|
|
my($op, $cx) = @_;
|
||
|
|
# if ($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(unback($op->sv->PV)));
|
||
|
|
} elsif ($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, 26); # was join($", @ary)
|
||
|
|
} else {
|
||
|
|
return $self->deparse($op, 26);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_backtick {
|
||
|
|
my $self = shift;
|
||
|
|
my($op, $cx) = @_;
|
||
|
|
# 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, $cx) = @_;
|
||
|
|
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, 26); # was join($", @ary)
|
||
|
|
} else {
|
||
|
|
return $self->deparse($op, 26);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_regcomp {
|
||
|
|
my $self = shift;
|
||
|
|
my($op, $cx) = @_;
|
||
|
|
my $kid = $op->first;
|
||
|
|
$kid = $kid->first if $kid->ppaddr eq "pp_regcmaybe";
|
||
|
|
$kid = $kid->first if $kid->ppaddr eq "pp_regcreset";
|
||
|
|
return $self->re_dq($kid);
|
||
|
|
}
|
||
|
|
|
||
|
|
sub OPp_RUNTIME () { 64 }
|
||
|
|
|
||
|
|
sub PMf_ONCE () { 0x2 }
|
||
|
|
sub PMf_SKIPWHITE () { 0x10 }
|
||
|
|
sub PMf_CONST () { 0x40 }
|
||
|
|
sub PMf_KEEP () { 0x80 }
|
||
|
|
sub PMf_GLOBAL () { 0x100 }
|
||
|
|
sub PMf_CONTINUE () { 0x200 }
|
||
|
|
sub PMf_EVAL () { 0x400 }
|
||
|
|
sub PMf_LOCALE () { 0x800 }
|
||
|
|
sub PMf_MULTILINE () { 0x1000 }
|
||
|
|
sub PMf_SINGLELINE () { 0x2000 }
|
||
|
|
sub PMf_FOLD () { 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 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;
|
||
|
|
}
|
||
|
|
if (null $kid) {
|
||
|
|
$re = re_uninterp(escape_str($op->precomp));
|
||
|
|
} else {
|
||
|
|
$re = $self->deparse($kid, 1);
|
||
|
|
}
|
||
|
|
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;
|
||
|
|
$re = "?$re?";
|
||
|
|
} else {
|
||
|
|
$re = single_delim($name, $delim, $re);
|
||
|
|
}
|
||
|
|
$re = $re . $flags;
|
||
|
|
if ($binop) {
|
||
|
|
return $self->maybe_parens("$var =~ $re", $cx, 20);
|
||
|
|
} else {
|
||
|
|
return $re;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
sub pp_match { matchop(@_, "m", "/") }
|
||
|
|
sub pp_pushre { matchop(@_, "m", "/") }
|
||
|
|
sub pp_qr { matchop(@_, "qr", "") }
|
||
|
|
|
||
|
|
sub pp_split {
|
||
|
|
my $self = shift;
|
||
|
|
my($op, $cx) = @_;
|
||
|
|
my($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, 6);
|
||
|
|
}
|
||
|
|
$expr = "split(" . join(", ", @exprs) . ")";
|
||
|
|
if ($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');
|
||
|
|
|
||
|
|
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 $flags = "";
|
||
|
|
if (null($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 = $self->dq($repl);
|
||
|
|
}
|
||
|
|
if (null $kid) {
|
||
|
|
$re = re_uninterp(escape_str($op->precomp));
|
||
|
|
} else {
|
||
|
|
$re = $self->deparse($kid, 1);
|
||
|
|
}
|
||
|
|
$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};
|
||
|
|
if ($binop) {
|
||
|
|
return $self->maybe_parens("$var =~ s"
|
||
|
|
. double_delim($re, $repl) . $flags,
|
||
|
|
$cx, 20);
|
||
|
|
} else {
|
||
|
|
return "s". double_delim($re, $repl) . $flags;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
1;
|
||
|
|
__END__
|
||
|
|
|
||
|
|
=head1 NAME
|
||
|
|
|
||
|
|
B::Deparse - Perl compiler backend to produce perl code
|
||
|
|
|
||
|
|
=head1 SYNOPSIS
|
||
|
|
|
||
|
|
B<perl> B<-MO=Deparse>[B<,-u>I<PACKAGE>][B<,-p>][B<,-l>][B<,-s>I<LETTERS>] I<prog.pl>
|
||
|
|
|
||
|
|
=head1 DESCRIPTION
|
||
|
|
|
||
|
|
B::Deparse is a backend module for the Perl compiler that generates
|
||
|
|
perl source code, based on the internal compiled structure that perl
|
||
|
|
itself creates after parsing a program. The output of B::Deparse won't
|
||
|
|
be exactly the same as the original source, since perl doesn't keep
|
||
|
|
track of comments or whitespace, and there isn't a one-to-one
|
||
|
|
correspondence between perl's syntactical constructions and their
|
||
|
|
compiled form, but it will often be close. When you use the B<-p>
|
||
|
|
option, the output also includes parentheses even when they are not
|
||
|
|
required by precedence, which can make it easy to see if perl is
|
||
|
|
parsing your expressions the way you intended.
|
||
|
|
|
||
|
|
Please note that this module is mainly new and untested code and is
|
||
|
|
still under development, so it may change in the future.
|
||
|
|
|
||
|
|
=head1 OPTIONS
|
||
|
|
|
||
|
|
As with all compiler backend options, these must follow directly after
|
||
|
|
the '-MO=Deparse', separated by a comma but not any white space.
|
||
|
|
|
||
|
|
=over 4
|
||
|
|
|
||
|
|
=item B<-p>
|
||
|
|
|
||
|
|
Print extra parentheses. Without this option, B::Deparse includes
|
||
|
|
parentheses in its output only when they are needed, based on the
|
||
|
|
structure of your program. With B<-p>, it uses parentheses (almost)
|
||
|
|
whenever they would be legal. This can be useful if you are used to
|
||
|
|
LISP, or if you want to see how perl parses your input. If you say
|
||
|
|
|
||
|
|
if ($var & 0x7f == 65) {print "Gimme an A!"}
|
||
|
|
print ($which ? $a : $b), "\n";
|
||
|
|
$name = $ENV{USER} or "Bob";
|
||
|
|
|
||
|
|
C<B::Deparse,-p> will print
|
||
|
|
|
||
|
|
if (($var & 0)) {
|
||
|
|
print('Gimme an A!')
|
||
|
|
};
|
||
|
|
(print(($which ? $a : $b)), '???');
|
||
|
|
(($name = $ENV{'USER'}) or '???')
|
||
|
|
|
||
|
|
which probably isn't what you intended (the C<'???'> is a sign that
|
||
|
|
perl optimized away a constant value).
|
||
|
|
|
||
|
|
=item B<-u>I<PACKAGE>
|
||
|
|
|
||
|
|
Normally, B::Deparse deparses the main code of a program, all the subs
|
||
|
|
called by the main program (and all the subs called by them,
|
||
|
|
recursively), and any other subs in the main:: package. To include
|
||
|
|
subs in other packages that aren't called directly, such as AUTOLOAD,
|
||
|
|
DESTROY, other subs called automatically by perl, and methods, which
|
||
|
|
aren't resolved to subs until runtime, use the B<-u> option. The
|
||
|
|
argument to B<-u> is the name of a package, and should follow directly
|
||
|
|
after the 'u'. Multiple B<-u> options may be given, separated by
|
||
|
|
commas. Note that unlike some other backends, B::Deparse doesn't
|
||
|
|
(yet) try to guess automatically when B<-u> is needed -- you must
|
||
|
|
invoke it yourself.
|
||
|
|
|
||
|
|
=item B<-l>
|
||
|
|
|
||
|
|
Add '#line' declarations to the output based on the line and file
|
||
|
|
locations of the original code.
|
||
|
|
|
||
|
|
=item B<-s>I<LETTERS>
|
||
|
|
|
||
|
|
Tweak the style of B::Deparse's output. At the moment, only one style
|
||
|
|
option is implemented:
|
||
|
|
|
||
|
|
=over 4
|
||
|
|
|
||
|
|
=item B<C>
|
||
|
|
|
||
|
|
Cuddle C<elsif>, C<else>, and C<continue> blocks. For example, print
|
||
|
|
|
||
|
|
if (...) {
|
||
|
|
...
|
||
|
|
} else {
|
||
|
|
...
|
||
|
|
}
|
||
|
|
|
||
|
|
instead of
|
||
|
|
|
||
|
|
if (...) {
|
||
|
|
...
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
...
|
||
|
|
}
|
||
|
|
|
||
|
|
The default is not to cuddle.
|
||
|
|
|
||
|
|
=back
|
||
|
|
|
||
|
|
=back
|
||
|
|
|
||
|
|
=head1 BUGS
|
||
|
|
|
||
|
|
See the 'to do' list at the beginning of the module file.
|
||
|
|
|
||
|
|
=head1 AUTHOR
|
||
|
|
|
||
|
|
Stephen McCamant <alias@mcs.com>, based on an earlier version by
|
||
|
|
Malcolm Beattie <mbeattie@sable.ox.ac.uk>.
|
||
|
|
|
||
|
|
=cut
|