1Sub::Attribute(3)     User Contributed Perl Documentation    Sub::Attribute(3)
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NAME

6       Sub::Attribute - Reliable subroutine attribute handlers
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VERSION

9       This document describes Sub::Attribute version 0.05.
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SYNOPSIS

12               package Attribute::Foo;
13               use Sub::Attribute;
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15               sub Foo :ATTR_SUB{
16                       my($class, $sym_ref, $code_ref, $attr_name, $attr_data) = @_;
17
18                       # ...
19               }
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21               # and later
22               package main;
23               use parent qw(Attribute::Foo);
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25               sub something :Foo(xyzzy){
26                       # ...
27               }
28               # apply: __PACKAGE__->Foo(\*something, \&something, 'Foo', 'xyzzy')
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DESCRIPTION

31       "Sub::Attribute" is a role to define attribute handlers for specific
32       subroutine attributes.
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34       The feature of this module is similar to that of "Attribute::Handlers",
35       but has less functionality and more reliability.  That is, while
36       "Attribute::Handlers" provides many options for "ATTR(CODE)",
37       "Sub::Attribute" provides no options for "ATTR_SUB".  However, the
38       attribute handlers defined by "Sub::Attribute" are always called with
39       informative arguments. "Attribute::Handlers"'s "ATTR(CODE)" is not
40       called in run-time "eval()", so "ATTR(CODE)" is not reliable.
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INTERFACE

43   The ATTR_SUB meta attribute
44       Defines a method as an subroutine attribute handler.
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CONFIGURATION AND ENVIRONMENT

47   $ENV{SUB_ATTRIBUTE_DEBUG}
48       If true, reports how attributes are applied, using "warn()" function.
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DEPENDENCIES

51       Perl 5.8.1 or later, and a C compiler.
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BUGS

54       No bugs have been reported.
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56       Please report any bugs or feature requests to the author.
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SEE ALSO

59       attributes.
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61       "Subroutine Attributes" in perlsub.
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63       Attribute::Handlers.
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AUTHOR

66       Goro Fuji (gfx) <gfuji(at)cpan.org>.
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69       Copyright (c) 2009-20010, Goro Fuji (gfx). Some rights reserved.
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71       This library is free software; you can redistribute it and/or modify it
72       under the same terms as Perl itself.
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76perl v5.30.0                      2019-07-26                 Sub::Attribute(3)
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