> If you need a workaround, I'd try first checking if the glob exists before checking the slot and avoiding exists &name

I have no words to express how f*cked *p typeglobs are!!!

If only a sub is using the symbol, then the coderef is stored directly where the glob is supposed to be.

(Larry gets a spanking next time we meet ;)

Anyway this code seems to work in all edge cases, only tested on mobile phone yet. 

use strict;
use warnings;
use feature 'say';
no autovivification;
use Data::Dump qw/pp/;


sub sub_exists{
  my $name = shift;

  return
    exists $::{$name}           # symbol exists
    &&
    (
     ref $::{$name} eq "CODE"   # only code
     ||
     (*{$::{$name}}{CODE} && 1) # also code
     ||
     !1                         # false
    );

}


for my $name (qw/zero one two three/) {
  pp { $name => sub_exists($name) };
}


our $one=1;

our $two=2;
sub two {2};

sub three {3}

[download]

{ zero => "" }
{ one => "" }
{ two => 1 }
{ three => 1 }

[download]

Cheers Rolf
(addicted to the Perl Programming Language :)
see Wikisyntax for the Monastery

TODO

Extend code to cover subs in other namespaces than main

In reply to Re^2: exists(&subname) causes strange autovivification problem (workaround) by LanX
in thread exists(&subname) causes strange autovivification problem by jimav

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