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16 Aug 2004 03:57:17 UTC
- Distribution: Class-ErrorHandler
- Module version: 0.01
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Bus factor: 1- License: perl_5
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NAME
Class::ErrorHandler - Base class for error handling
SYNOPSIS
package Foo; use base qw( Class::ErrorHandler ); sub class_method { my $class = shift; ... return $class->error("Help!") unless $continue; } sub object_method { my $obj = shift; ... return $obj->error("I am no more") unless $continue; } package main; use Foo; Foo->class_method or die Foo->errstr; my $foo = Foo->new; $foo->object_method or die $foo->errstr;
DESCRIPTION
Class::ErrorHandler provides an error-handling mechanism that's generic enough to be used as the base class for a variety of OO classes. Subclasses inherit its two error-handling methods, error and errstr, to communicate error messages back to the calling program.
On failure (for whatever reason), a subclass should call error and return to the caller; error itself sets the error message internally, then returns
undef
. This has the effect of the method that failed returningundef
to the caller. The caller should check for errors by checking for a return value ofundef
, and calling errstr to get the value of the error message on an error.As demonstrated in the SYNOPSIS, error and errstr work as both class methods and object methods.
USAGE
Class->error($message)
$object->error($message)
Sets the error message for either the class Class or the object $object to the message $message. Returns
undef
.Class->errstr
$object->errstr
Accesses the last error message set in the class Class or the object $object, respectively, and returns that error message.
LICENSE
Class::ErrorHandler is free software; you may redistribute it and/or modify it under the same terms as Perl itself.
AUTHOR & COPYRIGHT
Except where otherwise noted, Class::ErrorHandler is Copyright 2004 Benjamin Trott, cpan@stupidfool.org. All rights reserved.
Module Install Instructions
To install Class::ErrorHandler, copy and paste the appropriate command in to your terminal.
cpanm Class::ErrorHandler
perl -MCPAN -e shell install Class::ErrorHandler
For more information on module installation, please visit the detailed CPAN module installation guide.