Hi all,

Is there a clever way to undef an "active" subroutine? I'd like to do this: 

sub foo {
  undef &foo;
  ...
}

[download]
I find it curious that undef-ing is not permitted but that this is allowed: 
sub foo {
  *{foo} = sub { warn "second foo" };
  ...
}

[download]
In my case the sub I want to undef is an AUTOLOAD sub, and I'd want to remove it from the symbol table so it can't get called again.

In reply to undef-ing an active subroutine by perl5ever

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