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package B::Showlex;
use strict;
use B qw(svref_2object comppadlist class);
use B::Terse ();
#
# Invoke as
# perl -MO=Showlex,foo bar.pl
# to see the names of lexical variables used by &foo
# or as
# perl -MO=Showlex bar.pl
# to see the names of file scope lexicals used by bar.pl
#
sub showarray {
my ($name, $av) = @_;
my @els = $av->ARRAY;
my $count = @els;
my $i;
print "$name has $count entries\n";
for ($i = 0; $i < $count; $i++) {
print "$i: ";
$els[$i]->terse;
}
}
sub showlex {
my ($objname, $namesav, $valsav) = @_;
showarray("Pad of lexical names for $objname", $namesav);
showarray("Pad of lexical values for $objname", $valsav);
}
sub showlex_obj {
my ($objname, $obj) = @_;
$objname =~ s/^&main::/&/;
showlex($objname, svref_2object($obj)->PADLIST->ARRAY);
}
sub showlex_main {
showlex("comppadlist", comppadlist->ARRAY);
}
sub compile {
my @options = @_;
if (@options) {
return sub {
my $objname;
foreach $objname (@options) {
$objname = "main::$objname" unless $objname =~ /::/;
eval "showlex_obj('&$objname', \\&$objname)";
}
}
} else {
return \&showlex_main;
}
}
1;
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