Types::TypeTiny

type constraints used internally by Type::Tiny

Status

This module is covered by the Type-Tiny stability policy.

Description

Dogfooding.

This isn't a real Type::Library-based type library; that would involve too much circularity. But it exports some type constraints which, while designed for use within Type::Tiny, may be more generally useful.

Types

  • StringLike

    Accepts strings and objects overloading stringification.

  • HashLike[`a]

    Accepts hashrefs and objects overloading hashification.

    Since Types::TypeTiny 1.012, may be parameterized with another type constraint like HashLike[Int].

  • ArrayLike[`a]

    Accepts arrayrefs and objects overloading arrayfication.

    Since Types::TypeTiny 1.012, may be parameterized with another type constraint like ArrayLike[Int].

  • CodeLike

    Accepts coderefs and objects overloading codification.

  • TypeTiny

    Accepts blessed Type::Tiny objects.

  • _ForeignTypeConstraint

    Any reference which to_TypeTiny recognizes as something that can be coerced to a Type::Tiny object.

    Yes, the underscore is included.

Coercion Functions

to_TypeTiny($constraint)

Promotes (or "demotes" if you prefer) a Moose::Meta::TypeConstraint object to a Type::Tiny object.

Can also handle Validation::Class objects. Type constraints built from Validation::Class objects deliberately ignore field filters when they do constraint checking (and go to great lengths to do so); using filters for coercion only. (The behaviour of coerce if we don't do that is just too weird!)

Can also handle any object providing check and get_message methods. (This includes Mouse::Meta::TypeConstraint objects.) If the object also provides has_coercion and coerce methods, these will be used too.

Can also handle coderefs (but not blessed coderefs or objects overloading &{}). Coderefs are expected to return true iff $_ passes the constraint. If $_ fails the type constraint, they may either return false, or die with a helpful error message.

Methods

These are implemented so that Types::TypeTiny->meta->get_type($foo) works, for rough compatibility with a real Type::Library type library.

meta
type_names
get_type($name)
has_type($name)
coercion_names
get_coercion($name)
has_coercion($name)

Bugs

Please report any bugs to https://github.com/tobyink/p5-type-tiny/issues.

See Also

Type::Tiny.

Manual
The best place to start learning about this module is the manual.