NAME

MouseX::Types::Enum - Object-oriented, Java-like enum type declaration based on Mouse

SYNOPSIS

In the following example,

• Three enumeration constants, APPLE, GRAPE, and BANANA are defined.
• Three instance variables, name, color, price and has_seed are defined.
• A method make_sentence($suffix) is defined.

code:

{
    package Fruits;

    use strict;
    use warnings;

    use Mouse;
    extends 'MouseX::Types::Enum';

    has name => (is => 'ro', isa => 'Str');
    has color => (is => 'ro', isa => 'Str');
    has price => (is => 'ro', isa => 'Num');
    has has_seed => (is => 'ro', isa => 'Int', default => 1);

    sub make_sentence {
        my ($self, $suffix) = @_;
        $suffix ||= "";
        return sprintf("%s is %s%s", $self->name, $self->color, $suffix);
    }

    sub APPLE {1 => (
        name  => 'Apple',
        color => 'red',
        price => 1.2,
    )}
    sub GRAPE {2 => (
        name  => 'Grape',
        color => 'purple',
        price => 3.5,
    )}
    sub BANANA {3 => (
        name     => 'Banana',
        color    => 'yellow',
        has_seed => 0,
        price    => 1.5,
    )}

    __PACKAGE__->_build_enum;

    1;
}

# equivalence
ok(Fruits->APPLE == Fruits->APPLE);
ok(Fruits->APPLE != Fruits->GRAPE);
ok(Fruits->APPLE != Fruits->BANANA);

# instance variable
is(Fruits->APPLE->name, 'Apple');
is(Fruits->APPLE->color, 'red');
is(Fruits->APPLE->price, 1.2);

# instance method
is(Fruits->APPLE->make_sentence('!'), 'Apple is red!');

# get instance
is(Fruits->get(1), Fruits->APPLE);
is(Fruits->get(2), Fruits->GRAPE);
is(Fruits->get(3), Fruits->BANANA);
is_deeply(Fruits->all, {
    1 => Fruits->APPLE,
    2 => Fruits->GRAPE,
    3 => Fruits->BANANA,
});

DESCRIPTION

MouseX::Types::Enum provides Java-like enum type declaration based on Mouse. You can declare enums which have instance variables and methods.

LICENSE

Copyright (C) Naoto Ikeno.

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

AUTHOR

Naoto Ikeno ikenox@gmail.com