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.IX Title "Type::Tiny::Manual::UsingWithMoo 3pm"
.TH Type::Tiny::Manual::UsingWithMoo 3pm "2019-01-11" "perl v5.28.1" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.nh
.SH "NAME"
Type::Tiny::Manual::UsingWithMoo \- how to use Type::Tiny and Type::Library with Moo
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 2
\&   {
\&      package Person;
\&      
\&      use Moo 1.006000;
\&      use Sub::Quote qw( quote_sub );
\&      use Types::Standard qw( Str Int );
\&      
\&      has name => (
\&         is      => "ro",
\&         isa     => Str,
\&      );
\&      
\&      my $PositiveInt = Int
\&         \-> where( quote_sub \*(Aq$_ > 0\*(Aq )
\&         \-> plus_coercions( Int, sub { abs $_ } );
\&      
\&      has age => (
\&         is      => "rwp",
\&         isa     => $PositiveInt,
\&         coerce  => 1,
\&      );
\&      
\&      sub get_older {
\&         my $self = shift;
\&         my ($years) = @_;
\&         $PositiveInt\->assert_valid($years);
\&         $self\->_set_age($self\->age + $years);
\&      }
\&   }
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Type::Tiny is tested with Moo 1.001000 and above.
.PP
Type::Tiny overloads \f(CW\*(C`&{}\*(C'\fR. Moo supports using objects that overload
\&\f(CW\*(C`&{}\*(C'\fR as \f(CW\*(C`isa\*(C'\fR constraints, so Type::Tiny objects can directly be used
in \f(CW\*(C`isa\*(C'\fR.
.PP
Moo prior to 1.006000 doesn't support \f(CW\*(C`coerce => 1\*(C'\fR, instead
requiring a coderef to use as a coercion. However, Type::Tiny can
provide you with a suitable coderef to use (actually an object that
overloads \f(CW\*(C`&{}\*(C'\fR). Just use:
.PP
.Vb 5
\&   has age => (
\&      is      => "rwp",
\&      isa     => $PositiveInt,
\&      coerce  => $PositiveInt\->coercion,
\&   );
.Ve
.PP
If you can upgrade to the latest Moo, and use \f(CW\*(C`coerce => 1\*(C'\fR you'll
have a lot more fun though. :\-)
.PP
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.
.SS "Optimization"
.IX Subsection "Optimization"
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.
.PP
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.
.PP
If creating your own type constraints using \f(CW\*(C`Type::Tiny\->new\*(C'\fR, then
consider using Sub::Quote to quote the coderef; this allows you to take
advantage of inlining without having to write your own inlining routines.
.PP
See also Type::Tiny::Manual::Optimization.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
For examples using Type::Tiny with Moo see the \s-1SYNOPSIS\s0 sections of
Type::Tiny and Type::Library, and the
Moo integration tests <https://github.com/tobyink/p5-type-tiny/tree/master/t/30-integration/Moo>
in the test suite.
.SH "AUTHOR"
.IX Header "AUTHOR"
Toby Inkster <tobyink@cpan.org>.
.SH "COPYRIGHT AND LICENCE"
.IX Header "COPYRIGHT AND LICENCE"
This software is copyright (c) 2013\-2014, 2017\-2019 by Toby Inkster.
.PP
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
.SH "DISCLAIMER OF WARRANTIES"
.IX Header "DISCLAIMER OF WARRANTIES"
\&\s-1THIS PACKAGE IS PROVIDED \*(L"AS IS\*(R" AND WITHOUT ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.\s0