Dear monks,
Lets say I have a subref at my disposal, and the code in that subref includes a bunch of variables, that have been defined in the same block as the subref. Is it possible for me to access these variables somehow?
I have the following code to illustrate my question correctly:
A
foo.pl file
#!/usr/bin/perl -w
use strict;
use Foo;
my $i = 1;
my $bar = 'foo';
my $foo = Foo->new;
print "|", $foo->convert(sub {$i; return $bar}), "|\n";
And a Foo.pm module
#!/bin/false
package Foo;
use Devel::Peek;
sub new { return bless {}, shift};
sub convert {
shift;
use B::Deparse;
my $c = shift;
my $b = B::Deparse->new("-d");
my @p = split /\n/, $b->coderef2text($c);
print "FOOBAR: " . Dump($c) . " :BARFOO\n";
return $p[2] . '::' . eval $p[2];
}
1;
In this example, I want to get the value of the variables, that are used in the subref which is passed to the method of Foo (in this case, $i and $bar). Since the module is in a different file, I can't access the the variable ($i) content using eval. However, if I actually run the subref, it will return the correct value, so I think that in the subref's scope, these variables can be accessed. Is it possible for me to access these variables, maybe using some sort of B magic?
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