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Kavorka::Manual::PrototypeAndAttributes - the more rarely used features of Perl subroutines
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.
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.
Please report any bugs to http://rt.cpan.org/Dist/Display.html?Queue=Kavorka.
Toby Inkster <email@example.com>.
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.
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.