Type::Tiny::Manual::UsingWithMoo - how to use Type::Tiny and Type::Library with Moo |
Type::Tiny::Manual::UsingWithMoo - how to use Type::Tiny and Type::Library with Moo
{ package Person; use Moo; use Types::Standard qw( Str Int ); use Type::Utils qw( declare as where inline_as coerce from ); has name => ( is => "ro", isa => Str, ); my $PositiveInt = declare as Int, where { $_ > 0 }, inline_as { "$_ =~ /^[0-9]+\$/ and $_ > 0" }; coerce $PositiveInt, from Int, q{ abs $_ }; has age => ( is => "rwp", isa => $PositiveInt, coerce => $PositiveInt->coercion, ); sub get_older { my $self = shift; my ($years) = @_; $PositiveInt->assert_valid($years); $self->_set_age($self->age + $years); } }
Type::Tiny is tested with Moo 1.001000 and above.
Type::Tiny overloads &{}
. Moo supports using objects that overload
&{}
as isa
constraints, so Type::Tiny objects can directly be used
in isa
.
Moo doesn't support coerce => 1
but requires a coderef as a coercion.
However, again it supports using objects that overload &{}
, which
Type::Coercion does, allowing coerce => $Type->coercion
to work.
Type::Tiny hooks into Moo's HandleMoose interface to ensure that type constraints get inflated to Moose type constraints if and when Moo inflates your class to a full Moose class.
The usual advice for optimizing type constraints applies: use type constraints which can be inlined whenever possible, and define coercions as strings rather than coderefs.
Upgrading to Moo 1.002000 or above should provide a slight increase in speed for type constraints, as it allows them to be inlined into accessors and constructors.
If creating your own type constraints using Type::Tiny->new
, then
consider using the Sub::Quote manpage to quote the coderef; this allows you to take
advantage of inlining without having to write your own inlining routines.
See also the Type::Tiny::Manual::Optimization manpage.
For examples using Type::Tiny with Moo see the SYNOPSIS sections of the Type::Tiny manpage and the Type::Library manpage, and the Moo integration tests in the test suite.
Toby Inkster <tobyink@cpan.org>.
This software is copyright (c) 2013-2014 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.
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.
Type::Tiny::Manual::UsingWithMoo - how to use Type::Tiny and Type::Library with Moo |