Hi Einar,

When wrapping libraries that return error codes from functions a monadic output marshaller that does not return a value is very useful. This implements *- output marshallers that take the value and consume it, but don't return a result.

This is used like:

foo_error_t foo_something(random, arguments);

type Err = {#type foo_error_t#}

{#fun {`Foo', `Bar'} -> `()' handleError*- #}

handleError :: Err -> IO () handleError ...

Yes, that certainly makes sense. Thanks for also updating the documentation! I have pushed the patch into the public repo. Thanks for the contribution. Cheers, Manuel