What about using can... 
eval do { local $/; <DATA> }; # psuedo require!
die $@ if $@;

for my $sub ( 'foo', 'undefined' ) {
    if ( main->can($sub) ) {
        main->$sub;
    }
    else {
        print "$sub() not defined\n";
    }
}

__DATA__
sub foo {
    print "foo() worked\n";
}

[download]

Unless I state otherwise, all my code runs with strict and warnings

In reply to Re: How do I test the validity of a CODE reference? by FunkyMonk
in thread How do I test the validity of a CODE reference? by pilap

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