NAME
Moose::Util::TypeConstraints - Type constraint system for Moose
SYNOPSIS
use Moose::Util::TypeConstraints;
type Num => where { Scalar::Util::looks_like_number($_) };
subtype Natural
=> as Num
=> where { $_ > 0 };
subtype NaturalLessThanTen
=> as Natural
=> where { $_ < 10 };
DESCRIPTION
This module provides Moose with the ability to create type contraints to be are used in both attribute definitions and for method argument validation.
This is NOT a type system for Perl 5.
The type and subtype constraints are basically functions which will validate their first argument. If called with no arguments, they will return themselves (this is syntactic sugar for Moose attributes).
This module also provides a simple hierarchy for Perl 5 types, this could probably use some work, but it works for me at the moment.
Any
Value
Int
Str
Ref
ScalarRef
ArrayRef
HashRef
CodeRef
RegexpRef
Object
Suggestions for improvement are welcome.
FUNCTIONS
Type Constraint Constructors
- type
- subtype
- as
- where
Built-in Type Constraints
- Any
- Value
- Int
- Str
- Ref
- ArrayRef
- CodeRef
- HashRef
- RegexpRef
- ScalarRef
- Object
BUGS
All complex software has bugs lurking in it, and this module is no exception. If you find a bug please either email me, or add the bug to cpan-RT.
AUTHOR
Stevan Little <stevan@iinteractive.com>
COPYRIGHT AND LICENSE
Copyright 2006 by Infinity Interactive, Inc.
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.