NAME

DESCRIPTION

This is not quite a match for C's long jump, but it is "close enough". It is safer than C's jump in that it only lets you escape frames by going up the stack, you cannot jump in other ways.

SYNOPSIS

    use Long::Jump qw/setjump longjump/;

    my $out = setjump foo => sub {
        bar();
        ...; # Will never get here
    };
    is($out, [qw/x y z/], "Got results of the long jump");

    $out = setjump foo => sub {
        print "Not calling longjump";
    };
    is($out, undef, "longjump was not called so we got an undef response");

    sub bar {
        baz();
        return 'bar'; # Will never get here
    }

    sub baz {
        bat();
        return 'baz'; # Will never get here
    }

    sub bat {
        my @out = qw/x y z/;
        longjump foo => @out;

        return 'bat'; # Will never get here
    }

EXPORTS

$out = setjump($NAME, sub { ... })

$out = setjump $NAME, sub { ... }

$out = setjump($NAME => sub { ... })

$out = setjump $NAME => sub { ... }

Set a named point to which you will return when calling "longjump()". $out will be "undef" if "longjump()" was not called. $out will be an arrayref if "longjump()" was called. The $out arrayref will be empty, but present if "longjump()" is called without any return values.

The return value will always be false if "longjump" was not called, and will always be true if it was called.

You cannot nest multiple jump points with the same name, but you can nest multiple jump points if they have unqiue names. "longjump()" will always jump to the correct name.

longjump($NAME)

longjump $NAME

longjump($NAME, @RETURN_LIST)

longjump($NAME => @RETURN_LIST)

longjump $NAME => @RETURN_LIST

Jump to the named point, optionally with values to return. This will throw exceptions if you use an invalid $NAME, which includes the case of calling it without a set jump point.

SOURCE

MAINTAINERS

Chad Granum <exodist@cpan.org>

AUTHORS

Chad Granum <exodist@cpan.org>

COPYRIGHT

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

See http://dev.perl.org/licenses/