package B::Terse; use strict; use B qw(peekop class walkoptree walkoptree_exec walkoptree_slow main_start main_root cstring svref_2object SVf_IVisUV); use B::Asmdata qw(@specialsv_name); sub terse { my ($order, $cvref) = @_; my $cv = svref_2object($cvref); if ($order eq "exec") { walkoptree_exec($cv->START, "terse"); } else { walkoptree_slow($cv->ROOT, "terse"); } } sub compile { my $order = @_ ? shift : ""; my @options = @_; B::clearsym(); if (@options) { return sub { my $objname; foreach $objname (@options) { $objname = "main::$objname" unless $objname =~ /::/; eval "terse(\$order, \\&$objname)"; die "terse($order, \\&$objname) failed: $@" if $@; } } } else { if ($order eq "exec") { return sub { walkoptree_exec(main_start, "terse") } } else { return sub { walkoptree_slow(main_root, "terse") } } } } sub indent { my $level = @_ ? shift : 0; return " " x $level; } sub B::OP::terse { my ($op, $level) = @_; my $targ = $op->targ; $targ = ($targ > 0) ? " [$targ]" : ""; print indent($level), peekop($op), $targ, "\n"; } sub B::SVOP::terse { my ($op, $level) = @_; print indent($level), peekop($op), " "; $op->sv->terse(0); } sub B::PADOP::terse { my ($op, $level) = @_; print indent($level), peekop($op), " ", $op->padix, "\n"; } sub B::PMOP::terse { my ($op, $level) = @_; my $precomp = $op->precomp; print indent($level), peekop($op), defined($precomp) ? " /$precomp/\n" : " (regexp not compiled)\n"; } sub B::PVOP::terse { my ($op, $level) = @_; print indent($level), peekop($op), " ", cstring($op->pv), "\n"; } sub B::COP::terse { my ($op, $level) = @_; my $label = $op->label; if ($label) { $label = " label ".cstring($label); } print indent($level), peekop($op), $label || "", "\n"; } sub B::PV::terse { my ($sv, $level) = @_; print indent($level); printf "%s (0x%lx) %s\n", class($sv), $$sv, cstring($sv->PV); } sub B::AV::terse { my ($sv, $level) = @_; print indent($level); printf "%s (0x%lx) FILL %d\n", class($sv), $$sv, $sv->FILL; } sub B::GV::terse { my ($gv, $level) = @_; my $stash = $gv->STASH->NAME; if ($stash eq "main") { $stash = ""; } else { $stash = $stash . "::"; } print indent($level); printf "%s (0x%lx) *%s%s\n", class($gv), $$gv, $stash, $gv->SAFENAME; } sub B::IV::terse { my ($sv, $level) = @_; print indent($level); my $v = $sv->FLAGS & SVf_IVisUV ? "%u" : "%d"; printf "%s (0x%lx) $v\n", class($sv), $$sv, $sv->int_value; } sub B::NV::terse { my ($sv, $level) = @_; print indent($level); printf "%s (0x%lx) %s\n", class($sv), $$sv, $sv->NV; } sub B::NULL::terse { my ($sv, $level) = @_; print indent($level); printf "%s (0x%lx)\n", class($sv), $$sv; } sub B::SPECIAL::terse { my ($sv, $level) = @_; print indent($level); printf "%s #%d %s\n", class($sv), $$sv, $specialsv_name[$$sv]; } 1; __END__ =head1 NAME B::Terse - Walk Perl syntax tree, printing terse info about ops =head1 SYNOPSIS perl -MO=Terse[,OPTIONS] foo.pl =head1 DESCRIPTION See F. =head1 AUTHOR Malcolm Beattie, C =cut