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NAME

MooseX::Types::Ro - Moose type constraints for read-only containers

SYNOPSIS

package Foo;

use Moose;
use MooseX::Types::Ro qw(RoArrayRef RoHashRef);

has array => ( is => 'ro', isa => RoArrayRef, coerce => 1 );
has hash => ( is => 'ro', isa => RoHashRef, coerce => 1 );

my $foo = Foo->new(array => [1, 2, 3], hash => { foo => 1, bar => 2 });

# These all throw exceptions now:

$foo->array->[0] = 42;
$foo->array->[3] = 42;
push @{$foo->array}, 69;

$foo->hash->{bar} = 3;
delete $foo->hash->{bar};p
$foo->hash->{baz} = 4;

DESCRIPTION

MooseX::Types::Ro provides Moose type constraints for read-only array and hash references. Attempting to modify the values in any way, including adding or deleting from the arrays and hashes will throw an exception.

TYPES

RoArrayRef

A subtype of ArrayRef in which the array itself and all the elements are read-only. Coerces from ArrayRef by making a shallow copy and marking it read-only.

RoHashRef

A subtype of HashRef in which the hash itself and all the values are read-only. Coerces from HashRef by making a shallow copy and marking it read-only.

SEE ALSO

MooseX::Types, MooseX::Types::Moose, Moose::Util::TypeConstraints, Internals

AUTHOR

Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>.

COPYRIGHT & LICENSE

Copyright (c) 2010 Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>.

This program is free software; you can redistribute and/or modify it under the same terms as perl itself.