search for: somedirective

...appear. I don't think this needs complex boolean logic; with "If" and "IfNot" available, nested ifs could handle "and", and parallel ifs could handle "or" and "else". The only complex part here involves the definition of predicates. supported(SomeDirective) would handle the issues raised in this bug report, bug I can also imagine someone wanting to check for a particular parameter of a directive, such as if a yes/no directive added an "ask" parameter. The "ignore if not understood" prefix in option 1 avoids the need for predicate...