(No, it's not spam)

Sometimes in a subroutine I want to be able to make the caller return too.
Pop an extra level off the call stack.

Something like:

sub try_again {
  my $msg = shift;
  log($msg); 
  # ..do more stuff..
  return 1 if $ok;
  return;  # would be double return
}

sub go {
  do_it() or try_again("It didn't work") or return;
  ...
}

go();
[download]

This case is probably better handled with exceptions but it got me wondering about the "double return", is it possible? eg.

# no return in the outer sub
sub go { do_it or try_again; ... }
[download]

Some possible approaches:

• Source filter adding a return after the call
• Goto? I don't think it'd work. Clean up'd be skipped
• Exceptions... well that's slightly different
• Continuations. a) not in Perl b) I don't understand them
• Reverse the calls using block prototypes a la Error.pm?
• An XS/Inline helped return N

It should be obvious that this is just curiosity not serious code or a whinge about having to type 'return'

Thanks

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