tools/perl-5.8.0/lib/5.8.0/Attribute/Handlers/README

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                Release of version 0.77 of Attribute::Handlers
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NAME
    Attribute::Handlers - Simpler definition of attribute handlers

DESCRIPTION
    This module, when inherited by a package, allows that package's class to
    define attribute handler subroutines for specific attributes. Variables
    and subroutines subsequently defined in that package, or in packages
    derived from that package may be given attributes with the same names as
    the attribute handler subroutines, which will then be called at the end
    of the compilation phase (i.e. in a `CHECK' block).

EXAMPLE

        package UNIVERSAL;
        use Attribute::Handlers;

        my %name;
        sub name { return $name{$_[2]}||*{$_[1]}{NAME} }

        sub Name    :ATTR { $name{$_[2]} = $_[4] }

        sub Purpose :ATTR { print STDERR "Purpose of ", &name, " is $_[4]\n" }

        sub Unit    :ATTR { print STDERR &name, " measured in $_[4]\n" }


        package main;

        my $capacity : Name(capacity)
                     : Purpose(to store max storage capacity for files)
                     : Unit(Gb);

        package Other;

        sub foo : Purpose(to foo all data before barring it) { }


AUTHOR
    Damian Conway (damian@conway.org)

COPYRIGHT
             Copyright (c) 2001, Damian Conway. All Rights Reserved.
           This module is free software. It may be used, redistributed
               and/or modified under the same terms as Perl itself.


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0.77    Sat Jun  8 22:58:56 CEST 2002

        - Since Attribute::Handlers now is core, I will refer to changes
        with their patch number, please read  Porting/repository.pod from
        your a perl tarball for more information.

        - Brought up to date with perl 5.8RC1 version
        will be 5.8 if no more changes come in

        - [#13686] This changes the behaviour of lexical attributes.
        Prior to this lexical attributes were done at a compile time,
        and they would loose their attribute on the next run over them.
        Now perl 5.8 calls the attribute handler runtime whenever it hits my.

        - [#14448] Fixes cases with too high refcounts on lexical attributes

        - [#15945] Do not warn about too late CHECK and INIT block if
        A::H is pulled in using a require.


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AVAILABILITY

Attribute::Handlers has been uploaded to the CPAN
and is also available from:

        http://www.csse.monash.edu.au/~damian/CPAN/Attribute-Handlers.tar.gz

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