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
and even then,
:(...) 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.