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.IX Title "Sub::HandlesVia::Declare 3"
.TH Sub::HandlesVia::Declare 3 2024-09-02 "perl v5.40.0" "User Contributed Perl Documentation"
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.SH NAME
Sub::HandlesVia::Declare \- declare delegations at compile\-time
.SH SYNOPSIS
.IX Header "SYNOPSIS"
.Vb 1
\& use Sub::HandlesVia::Declare( $attr, $via => %delegations );
.Ve
.PP
This is roughly equivalent to the following:
.PP
.Vb 1
\& use Sub::HandlesVia qw(delegations);
\& 
\& BEGIN {
\&   delegations(
\&     attribute    => $attr,
\&     handles_via  => $via,
\&     handles      => \e%delegations,
\&   );
\& };
.Ve
.PP
Except it doesn't import the \f(CW\*(C`delegations\*(C'\fR function into your namespace.
.SH DESCRIPTION
.IX Header "DESCRIPTION"
Useful for Object::Pad and kind of nice for Class::Tiny. Basically
any class builder than does its stuff at compile time.
.SS Object::Pad
.IX Subsection "Object::Pad"
.Vb 1
\& use Object::Pad;
\& 
\& class Kitchen {
\&   has @foods;
\&   use Sub::HandlesVia::Declare \*(Aq@foods\*(Aq, Array => (
\&     all_foods => \*(Aqall\*(Aq,
\&     add_food  => \*(Aqpush\*(Aq,
\&   );
\& }
.Ve
.PP
If an attribute begins with a '@' or '%', \f(CW$via\fR can be omitted.
.PP
.Vb 1
\& use Object::Pad;
\& 
\& class Kitchen {
\&   has @foods;
\&   use Sub::HandlesVia::Declare \*(Aq@foods\*(Aq, (
\&     all_foods => \*(Aqall\*(Aq,
\&     add_food  => \*(Aqpush\*(Aq,
\&   );
\& }
.Ve
.SS Class::Tiny
.IX Subsection "Class::Tiny"
.Vb 10
\& package Kitchen;
\& use Class::Tiny {
\&   foods  => sub { [] },
\&   drinks => sub { [ \*(Aqwater\*(Aq ] },
\& };
\& use Sub::HandlesVia::Declare \*(Aqfoods\*(Aq, Array => (
\&   all_foods  => \*(Aqall\*(Aq,
\&   add_food   => \*(Aqpush\*(Aq,
\& );
\& use Sub::HandlesVia::Declare \*(Aqdrinks\*(Aq, Array => (
\&   all_drinks => \*(Aqall\*(Aq,
\&   add_drink  => \*(Aqpush\*(Aq,
\& );
.Ve
.SH BUGS
.IX Header "BUGS"
Please report any bugs to
<https://github.com/tobyink/p5\-sub\-handlesvia/issues>.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Sub::HandlesVia.
.SH AUTHOR
.IX Header "AUTHOR"
Toby Inkster <tobyink@cpan.org>.
.SH "COPYRIGHT AND LICENCE"
.IX Header "COPYRIGHT AND LICENCE"
This software is copyright (c) 2022 by Toby Inkster.
.PP
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
.SH "DISCLAIMER OF WARRANTIES"
.IX Header "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.