Kavorka::Manual::PrototypeAndAttributes3pm
The more rarely used features of perl subroutines
Overview
The Prototype
Like with the sub keyword, a prototype may be provided for functions. Method dispatch ignores this, so it's only likely to be useful for "fun", and even then, rarely.
Like Function::Parameters, Kavorka uses ":(...)" to indicate a prototype. This avoids ambiguity between signatures, prototypes and attributes.
For compatibility with Perl 5.20, the special attribute ":prototype(...)" is supported as an alternative mechanism for expressing prototypes.
The Attributes
Attributes are parsed as per "Subroutine Attributes" in perlsub.
For anonymous functions, some attributes (e.g. ":lvalue") may be applied too late to take effect. Attributes should mostly work for named functions though.
Copyright and licence
This software is copyright (c) 2013-2014, 2017 by Toby Inkster.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.
Disclaimer of warranties
THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
Releases
2 releases since Debian 9 (Stretch); the text changed 1 time.