package B::Terse; our $VERSION = '1.02'; use strict; use B qw(class); use B::Asmdata qw(@specialsv_name); use B::Concise qw(concise_subref set_style_standard); use Carp; sub terse { my ($order, $subref) = @_; set_style_standard("terse"); if ($order eq "exec") { concise_subref('exec', $subref); } else { concise_subref('basic', $subref); } } sub compile { my @args = @_; my $order = @args ? shift(@args) : ""; $order = "-exec" if $order eq "exec"; unshift @args, $order if $order ne ""; B::Concise::compile("-terse", @args); } sub indent { my ($level) = @_ ? shift : 0; return " " x $level; } # Don't use this, at least on OPs in subroutines: it has no way of # getting to the pad, and will give wrong answers or crash. sub B::OP::terse { carp "B::OP::terse is deprecated; use B::Concise instead"; B::Concise::b_terse(@_); } sub B::SV::terse { my($sv, $level) = (@_, 0); my %info; B::Concise::concise_sv($sv, \%info); my $s = indent($level) . B::Concise::fmt_line(\%info, $sv, "#svclass~(?((#svaddr))?)~#svval", 0); chomp $s; print "$s\n" unless defined wantarray; $s; } sub B::NULL::terse { my ($sv, $level) = @_; my $s = indent($level) . sprintf "%s (0x%lx)", class($sv), $$sv; print "$s\n" unless defined wantarray; $s; } sub B::SPECIAL::terse { my ($sv, $level) = @_; my $s = indent($level) . sprintf( "%s #%d %s", class($sv), $$sv, $specialsv_name[$$sv]); print "$s\n" unless defined wantarray; $s; } 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 This version of B::Terse is really just a wrapper that calls B::Concise with the B<-terse> option. It is provided for compatibility with old scripts (and habits) but using B::Concise directly is now recommended instead. For compatiblilty with the old B::Terse, this module also adds a method named C to B::OP and B::SV objects. The B::SV method is largely compatible with the old one, though authors of new software might be advised to choose a more user-friendly output format. The B::OP C method, however, doesn't work well. Since B::Terse was first written, much more information in OPs has migrated to the scratchpad datastructure, but the C interface doesn't have any way of getting to the correct pad. As a kludge, the new version will always use the pad for the main program, but for OPs in subroutines this will give the wrong answer or crash. =head1 AUTHOR The original version of B::Terse was written by Malcolm Beattie, Embeattie@sable.ox.ac.ukE. This wrapper was written by Stephen McCamant, Esmcc@MIT.EDUE. =cut