NAME

Venus::Role::Matchable - Matchable Role

ABSTRACT

Matchable Role for Perl 5

SYNOPSIS

package Example;

use Venus::Class;

with 'Venus::Role::Matchable';

attr 'active';

sub validate {
  my ($self) = @_;

  return $self->match->when('active')->then(true)->none(false);
}

package main;

my $example = Example->new;

# $example->validate->result;

# 0

DESCRIPTION

This package modifies the consuming package and provides a mechanism for assembling complex pattern matching operations.

METHODS

This package provides the following methods:

match

match(Str | CodeRef $method, Any @args) (Match)

The match method returns a Venus::Match object having the match value set to the invocant or the result of a dispatch. This method supports dispatching, i.e. providing a method name and arguments whose return value will be acted on by this method.

Since 0.04

match example 1

package main;

my $example = Example->new;

my $match = $example->match;

# bless({..., value => bless(..., 'Example')}, 'Venus::Match')

match example 2

package main;

my $example = Example->new;

my $match = $example->match('active');

# bless({..., value => undef}, 'Venus::Match')

match example 3

package main;

my $example = Example->new(active => 1);

my $match = $example->match('active');

# bless({..., value => 1}, 'Venus::Match')

AUTHORS

Awncorp, awncorp@cpan.org

LICENSE

Copyright (C) 2000, Al Newkirk.

This program is free software, you can redistribute it and/or modify it under the terms of the Apache license version 2.0.