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package MouseX::NativeTraits::Counter;
use Mouse::Role;
with 'MouseX::NativeTraits';
sub method_provider_class {
return 'MouseX::NativeTraits::MethodProvider::Counter';
}
sub helper_type {
return 'Int';
}
sub _default_default { 0 }
no Mouse::Role;
1;
__END__
=head1 NAME
MouseX::NativeTraits::Counter - Helper trait for counter attributes
=head1 SYNOPSIS
package MyHomePage;
use Mouse;
has 'counter' => (
traits => ['Counter'],
is => 'ro',
isa => 'Num',
default => 0,
handles => {
inc_counter => 'inc',
dec_counter => 'dec',
reset_counter => 'reset',
},
);
my $page = MyHomePage->new();
$page->inc_counter; # same as $page->counter( $page->counter + 1 );
$page->dec_counter; # same as $page->counter( $page->counter - 1 );
=head1 DESCRIPTION
This module provides a simple counter attribute, which can be
incremented and decremented.
If your attribute definition does not include any of I<is>, I<isa>,
I<default> or I<handles> but does use the C<Counter> trait,
then this module applies defaults as in the L</SYNOPSIS>
above. This allows for a very basic counter definition:
has 'foo' => (traits => ['Counter']);
$obj->inc_foo;
=head1 PROVIDED METHODS
These methods are implemented in
L<MouseX::NativeTraits::MethodProvider::Counter>. It is important to
note that all those methods do in place modification of the value stored in
the attribute.
=over 4
=item B<set($value)>
Set the counter to the specified value.
=item B<inc>
Increments the value stored in this slot by 1. Providing an argument will
cause the counter to be increased by specified amount.
=item B<dec>
Decrements the value stored in this slot by 1. Providing an argument will
cause the counter to be increased by specified amount.
=item B<reset>
Resets the value stored in this slot to it's default value.
=back
=head1 METHODS
=over 4
=item B<meta>
=item B<method_provider_class>
=item B<helper_type>
=back
=head1 SEE ALSO
L<MouseX::NativeTraits>
=cut
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