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throwable(3pm) [debian man page]

Throwable(3pm)						User Contributed Perl Documentation					    Throwable(3pm)

NAME

       Throwable - a role for classes that can be thrown

VERSION

       version 0.102080

SYNOPSIS

	 package Redirect;
	 use Moose;
	 with 'Throwable';

	 has url => (is => 'ro');

       ...then later...

	 Redirect->throw({ url => $url });

DESCRIPTION

       Throwable is a role for classes that are meant to be thrown as exceptions to standard program flow.  It is very simple and does only two
       things: saves any previous value for $@ and calls "die $self".

ATTRIBUTES

   previous_exception
       This attribute is created automatically, and stores the value of $@ when the Throwable object is created.

METHODS

   throw
	 Something::Throwable->throw({ attr => $value });

       This method will call new, passing all arguments along to new, and will then use the created object as the only argument to "die".

       If called on an object that does Throwable, the object will be rethrown.

AUTHORS

       o   Ricardo SIGNES <rjbs@cpan.org>

       o   Florian Ragwitz <rafl@debian.org>

COPYRIGHT AND LICENSE

       This software is copyright (c) 2010 by Ricardo SIGNES.

       This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

perl v5.10.1							    2010-07-27							    Throwable(3pm)

Check Out this Related Man Page

MooseX::SetOnce(3pm)					User Contributed Perl Documentation				      MooseX::SetOnce(3pm)

NAME

       MooseX::SetOnce - write-once, read-many attributes for Moose

VERSION

       version 0.200001

SYNOPSIS

       Add the "SetOnce" trait to attributes:

	 package Class;
	 use Moose;
	 use MooseX::SetOnce;

	 has some_attr => (
	   is	  => 'rw',
	   traits => [ qw(SetOnce) ],
	 );

       ...and then you can only set them once:

	 my $object = Class->new;

	 $object->some_attr(10);  # works fine
	 $object->some_attr(20);  # throws an exception: it's already set!

DESCRIPTION

       The 'SetOnce' attribute lets your class have attributes that are not lazy and not set, but that cannot be altered once set.

       The logic is very simple:  if you try to alter the value of an attribute with the SetOnce trait, either by accessor or writer, and the
       attribute has a value, it will throw an exception.

       If the attribute has a clearer, you may clear the attribute and set it again.

AUTHOR

       Ricardo SIGNES <rjbs@cpan.org>

COPYRIGHT AND LICENSE

       This software is copyright (c) 2011 by Ricardo SIGNES.

       This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

perl v5.12.4							    2011-10-06						      MooseX::SetOnce(3pm)
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