-- Perl 5.8.6 documentation --
sub
  • sub NAME BLOCK
  • sub NAME (PROTO) BLOCK
  • sub NAME : ATTRS BLOCK
  • sub NAME (PROTO) : ATTRS BLOCK
  • This is subroutine definition, not a real function per se. Without a BLOCK it's just a forward declaration. Without a NAME, it's an anonymous function declaration, and does actually return a value: the CODE ref of the closure you just created.

    See perlsub and perlref for details about subroutines and references, and attributes and Attribute::Handlers for more information about attributes.