Unexpected - Localised exception classes composed from roles
package YourApp::Exception; use Moo; extends 'Unexpected'; with 'Unexpected::TraitFor::ErrorLeader'; __PACKAGE__->ignore_class( 'YourApp::IgnoreMe' ); has '+class' => default => __PACKAGE__; package YourApp; use YourApp::Exception; use Try::Tiny; sub some_method { my $self = shift; try { this_will_fail } catch { YourApp::Exception->throw $_ }; } # OR sub some_method { my $self = shift; eval { this_will_fail }; YourApp::Exception->throw_on_error; } # THEN try { $self->some_method() } catch { warn $_->message };
An exception class that supports error messages with placeholders, a throw method with automatic re-throw upon detection of self, conditional throw if an exception was caught and a simplified stack trace in addition to the error message with full stack trace
Applies exception roles to the exception base class Unexpected. See "Dependencies" for the list of roles that are applied
The list of constructor methods signatures is described in build_attr_from
Error objects are overloaded to stringify to the full error message plus a leader if the optional ErrorLeader role has been applied
ErrorLeader
Dummy subroutine which is modified by the applied roles
Differentiates different constructor method signatures
String overload is performed in this class as opposed to the stringify error role since overloading is not supported in Moo::Role
There are no known incompatibilities in this module
Throwable did not let me use the stack trace filter directly, it's wrapped inside an attribute constructor. There was nothing else in Throwable that would not have been overridden
There are no known bugs in this module. Please report problems to http://rt.cpan.org/NoAuth/Bugs.html?Dist=Unexpected. Patches are welcome
Larry Wall - For the Perl programming language
Throwable::Error - Lifted the stack frame filter from here
John Sargent - Came up with the package name
Peter Flanigan, <pjfl@cpan.org>
<pjfl@cpan.org>
Copyright (c) 2014 Peter Flanigan. All rights reserved
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See perlartistic
This program is distributed in the hope that it will be useful, but WITHOUT WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE
To install Unexpected, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Unexpected
CPAN shell
perl -MCPAN -e shell install Unexpected
For more information on module installation, please visit the detailed CPAN module installation guide.