HTML::FormFu::Constraint::Callback - Code Callback Constraint $field->constraint({ type => 'Callback', callback => \&foo, ); --- elements: - type: Text name: foo constraints: - type: Callback callback: "main::my_constraint" sub foo { my ( $value, $params ) = @_; # return true or false } The first argument passed to the callback is the submitted value for the associated field. The second argument passed to the callback is a hashref of name/value pairs for all input fields. This constraint doesn't honour the "not()" value.

callback
Arguments: \&code-reference Arguments: "subroutine-name" Is a sub-class of, and inherits methods from HTML::FormFu::Constraint HTML::FormFu The callback code-ref is copied internally using "dclone" in Storable. It seems that because of this, the coderef does not act as a true closure, and cannot refer to variables and subroutines that would otherwise be in scope. This need further investigation. Carl Franks "cfranks@cpan.org" This library is free software, you can redistribute it and/or modify it under the same terms as Perl itself.