MouseX::Types(3pm)

Usage

Library Definition

  package MyLibrary;
  # predeclare our own types
  use MouseX::Types 
    -declare => [qw(
        PositiveInt NegativeInt
    )];
  # import builtin types
  use MouseX::Types::Mouse 'Int';
  # type definition.
  subtype PositiveInt, 
      as Int, 
      where { $_ > 0 },
      message { "Int is not larger than 0" };
  
  subtype NegativeInt,
      as Int,
      where { $_ < 0 },
      message { "Int is not smaller than 0" };
  # type coercion
  coerce PositiveInt,
      from Int,
          via { 1 };
  1;

Usage

  package Foo;
  use Mouse;
  use MyLibrary qw( PositiveInt NegativeInt );
  # use the exported constants as type names
  has 'bar',
      isa    => PositiveInt,
      is     => 'rw';
  has 'baz',
      isa    => NegativeInt,
      is     => 'rw';
  sub quux {
      my ($self, $value);
      # test the value
      print "positive\n" if is_PositiveInt($value);
      print "negative\n" if is_NegativeInt($value);
      # coerce the value, NegativeInt doesn't have a coercion
      # helper, since it didn't define any coercions.
      $value = to_PositiveInt($value) or die "Cannot coerce";
  }
  1;

Repository

  git clone git://github.com/yappo/p5-mousex-types.git MouseX-Types

Copyright and license

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

Releases

7 releases since Debian 7 (Wheezy); the text changed 2 times.