NAME

SYNOPSIS

    package Foo;
    use Crypt::OpenPGP::ErrorHandler;
    use base qw( Crypt::OpenPGP::ErrorHandler );

    sub class_method {
        my $class = shift;
        # Stuff happens...
        return $class->error("Help!");
    }

    sub object_method {
        my $obj = shift;
        # Stuff happens...
        return $obj->error("I am no more");
    }

    package main;

    Foo->class_method or die Foo->errstr;

    my $foo = Foo->new;
    $foo->object_method or die $foo->errstr;

DESCRIPTION

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 returning "undef" to the caller. The caller should check for errors by checking for a return value of "undef", and in this case should call errstr to get the value of the error message. Note that calling errstr when an error has not occurred is undefined behavior and will rarely do what you want.

As demonstrated in the SYNOPSIS (above), error and errstr work both as class methods and as object methods.

USAGE

AUTHOR & COPYRIGHTS