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.\" ========================================================================
.\"
.IX Title "Throwable 3pm"
.TH Throwable 3pm "2021-01-01" "perl v5.32.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
Throwable \- a role for classes that can be thrown
.SH "VERSION"
.IX Header "VERSION"
version 0.200013
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 4
\&  package Redirect;
\&  # NOTE: Moo can also be used here instead of Moose
\&  use Moose;
\&  with \*(AqThrowable\*(Aq;
\&
\&  has url => (is => \*(Aqro\*(Aq);
.Ve
.PP
\&...then later...
.PP
.Vb 1
\&  Redirect\->throw({ url => $url });
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Throwable is a role for classes that are meant to be thrown as exceptions to
standard program flow.  It is very simple and does only two things: saves any
previous value for \f(CW$@\fR and calls \f(CW\*(C`die $self\*(C'\fR.
.PP
Throwable is implemented with Moo, so you can stick to Moo or use Moose,
as you prefer.
.SH "ATTRIBUTES"
.IX Header "ATTRIBUTES"
.SS "previous_exception"
.IX Subsection "previous_exception"
This attribute is created automatically, and stores the value of \f(CW$@\fR when the
Throwable object is created.  This is done on a \fIbest effort basis\fR.  \f(CW$@\fR is
subject to lots of spooky action-at-a-distance.  For now, there are clearly
ways that the previous exception could be lost.
.SH "METHODS"
.IX Header "METHODS"
.SS "throw"
.IX Subsection "throw"
.Vb 1
\&  Something::Throwable\->throw({ attr => $value });
.Ve
.PP
This method will call new, passing all arguments along to new, and will then
use the created object as the only argument to \f(CW\*(C`die\*(C'\fR.
.PP
If called on an object that does Throwable, the object will be rethrown.
.SH "AUTHORS"
.IX Header "AUTHORS"
.IP "\(bu" 4
Ricardo \s-1SIGNES\s0 <rjbs@cpan.org>
.IP "\(bu" 4
Florian Ragwitz <rafl@debian.org>
.SH "CONTRIBUTORS"
.IX Header "CONTRIBUTORS"
.IP "\(bu" 4
Arthur Axel 'fREW' Schmidt <frioux@gmail.com>
.IP "\(bu" 4
Brian Manning <brian@xaoc.org>
.IP "\(bu" 4
Brian Manning <xaoc@cpan.org>
.IP "\(bu" 4
Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>
.IP "\(bu" 4
Dave Rolsky <autarch@urth.org>
.IP "\(bu" 4
David E. Wheeler <david@justatheory.com>
.IP "\(bu" 4
Graham Knop <haarg@haarg.org>
.IP "\(bu" 4
Jeffrey Ryan Thalhammer <jeff@imaginative\-software.com>
.IP "\(bu" 4
Justin Hunter <justin.d.hunter@gmail.com>
.IP "\(bu" 4
Matt S Trout <mst@shadowcat.co.uk>
.IP "\(bu" 4
Olaf Alders <olaf@wundersolutions.com>
.IP "\(bu" 4
Toby Inkster <mail@tobyinkster.co.uk>
.SH "COPYRIGHT AND LICENSE"
.IX Header "COPYRIGHT AND LICENSE"
This software is copyright (c) 2015 by Ricardo \s-1SIGNES.\s0
.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.