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Type::Tiny::Manual(3pm) User Contributed Perl Documentation Type::Tiny::Manual(3pm)
NAME
Type::Tiny::Manual - an overview of Type::Tiny
SYNOPSIS
Type::Tiny is a small Perl <http://www.perl.org/> class for writing type constraints,
inspired by Moose's type constraint API and MooseX::Types. It has only one non-core
dependency (and even that is simply a module that was previously distributed as part of
Type::Tiny but has since been spun off), and can be used with Moose, Mouse, or Moo (or
none of the above).
Type::Tiny is used by over 800 Perl distributions on the CPAN (Comprehensive Perl Archive
Network) and can be considered a stable and mature framework for efficiently and reliably
enforcing data types.
Type::Tiny is bundled with Type::Library a framework for organizing type constraints into
collections. Also bundled is Types::Standard, a Moose-inspired library of useful type
constraints. Type::Params is also provided, to allow very fast checking and coercion of
function and method parameters.
The following example gives you an idea of some of the features of these modules. If you
don't understand it all, that's fine; that's what the rest of the manual is for. Although
the example uses Moo, the "use Moo" could be changed to "use Moose" or "use Mouse" and it
would still work.
use v5.12;
use strict;
use warnings;
package Horse {
use Moo;
use Types::Standard qw( Str Int Enum ArrayRef InstanceOf );
use Type::Params qw( compile );
use namespace::autoclean;
has name => (
is => 'ro',
isa => Str,
required => 1,
);
has gender => (
is => 'ro',
isa => Enum[qw( f m )],
);
has age => (
is => 'rw',
isa => Int->where( '$_ >= 0' ),
);
has children => (
is => 'ro',
isa => ArrayRef[ InstanceOf['Horse'] ],
default => sub { return [] },
);
sub add_child {
# method signature
state $check = compile( InstanceOf['Horse'], InstanceOf['Horse'] );
my ($self, $child) = $check->(@_); # unpack @_
push @{ $self->children }, $child;
return $self;
}
}
package main;
my $boldruler = Horse->new(
name => "Bold Ruler",
gender => 'm',
age => 16,
);
my $secretariat = Horse->new(
name => "Secretariat",
gender => 'm',
age => 0,
);
$boldruler->add_child( $secretariat );
use Types::Standard qw( is_Object assert_Object );
# is_Object will return a boolean
#
if ( is_Object($boldruler) ) {
say $boldruler->name;
}
# assert_Object will return $secretariat or die
#
say assert_Object($secretariat)->name;
MANUAL
Even if you are using Type::Tiny with other object-oriented programming toolkits (such as
Moose or Mouse), you should start with the Moo sections of the manual. Most of the
information is directly transferrable and the Moose and Mouse sections of the manual list
the minor differences between using Type::Tiny with Moo and with them.
In general, this manual assumes you use Perl 5.12 or above and may use examples that do
not work on older versions of Perl. Type::Tiny does work on earlier versions of Perl, but
not all the examples and features in the manual will run without adjustment. (For
instance, you may need to replace "state" variables with lexical variables, avoid the
"package NAME { BLOCK }" syntax, etc.)
o Type::Tiny::Manual::Installation
How to install Type::Tiny. If Type::Tiny is already installed, you can skip this.
o Type::Tiny::Manual::UsingWithMoo
Basic use of Type::Tiny with Moo, including attribute type constraints, parameterized
type constraints, coercions, and method parameter checking.
o Type::Tiny::Manual::UsingWithMoo2
Advanced use of Type::Tiny with Moo, including unions and intersections,
"stringifies_to", "numifies_to", "with_attribute_values", and "where".
o Type::Tiny::Manual::UsingWithMoo3
There's more than one way to do it! Alternative ways of using Type::Tiny, including
type registries, exported functions, and "dwim_type".
o Type::Tiny::Manual::Libraries
Defining your own type libraries, including extending existing libraries, defining new
types, adding coercions, defining parameterizable types, and the declarative style.
o Type::Tiny::Manual::UsingWithMoose
How to use Type::Tiny with Moose, including the advantages of Type::Tiny over built-in
type constraints, and Moose-specific features.
o Type::Tiny::Manual::UsingWithMouse
How to use Type::Tiny with Mouse, including the advantages of Type::Tiny over built-in
type constraints, and Mouse-specific features.
o Type::Tiny::Manual::UsingWithClassTiny
Including how to Type::Tiny in your object's "BUILD" method, and third-party shims
between Type::Tiny and Class::Tiny.
o Type::Tiny::Manual::UsingWithOther
Using Type::Tiny with Class::InsideOut, Params::Check, and Object::Accessor.
o Type::Tiny::Manual::UsingWithTestMore
Type::Tiny for test suites.
o Type::Tiny::Manual::Params
Advanced information on Type::Params, and using Type::Tiny with other signature
modules like Function::Parameters and Kavorka.
o Type::Tiny::Manual::NonOO
Type::Tiny in non-object-oriented code.
o Type::Tiny::Manual::Optimization
Squeeze the most out of your CPU.
o Type::Tiny::Manual::Coercions
Advanced information on coercions.
o Type::Tiny::Manual::AllTypes
An alphabetical list of all type constraints bundled with Type::Tiny.
o Type::Tiny::Manual::Policies
Policies related to Type::Tiny development.
o Type::Tiny::Manual::Contributing
Contributing to Type::Tiny development.
BUGS
Please report any bugs to <https://github.com/tobyink/p5-type-tiny/issues>.
SEE ALSO
The Type::Tiny homepage <https://typetiny.toby.ink/>.
AUTHOR
Toby Inkster <tobyink AT cpan.org>.
COPYRIGHT AND LICENCE
This software is copyright (c) 2013-2014, 2017-2021 by Toby Inkster.
This is free software; you can redistribute it and/or modify it under the same terms as
the Perl 5 programming language system itself.
DISCLAIMER OF WARRANTIES
THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
PURPOSE.
perl v5.32.1 2021-08-31 Type::Tiny::Manual(3pm)
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On Apache
Under GNU General Public License
2025-11-04 11:34 @216.73.216.210 CrawledBy Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)