[OT] What's my name?

[Paul LeoNerd Evans]

On Tue, 7 Oct 2008 17:27:37 +0100
Nicholas Clark <nick at ccl4.org> wrote:

> In this code:
> 
>     *beer = *buffy = *pie = *kittens = sub {
>         ...
>     };
> 
> is there an easy way for the subroutine to know what name it was called as.
> If it makes it easier, the subroutine is actually going to be a method.

Looking at

  http://search.cpan.org/perldoc?Sub::Identify

It has sub_name() though I suspect that will give __ANON__ here.

Perhaps you could hunt it down.

  package Some::Pkg;

  *foo = *bar = *splot = sub { 'wibble' };

  package main;

  use Sub::Identify qw( stash_name );

  my $coderef = \&Some::Pkg::foo;

  my @names;
  {
    no strict 'refs';
    my $pkg = stash_name( $coderef );
    @names = map { $pkg."::$_" }
             grep { $coderef == \&{$pkg."::$_"} }
             keys %{$pkg."::"};
  }

  print "The sub is called: " . join( " ", @names ) . "\n";

Gives

  The sub is called: Some::Pkg::bar Some::Pkg::foo Some::Pkg::splot

> caller gives __ANON__, because, after all, that was the name the subroutine
> had when it was compiled.

If you want to set one, see

  http://search.cpan.org/perldoc?Sub::Name

-- 
Paul "LeoNerd" Evans

leonerd at leonerd.org.uk
ICQ# 4135350       |  Registered Linux# 179460
http://www.leonerd.org.uk/
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