Handler generator

gistfile1.m

static IMP handler_returning_void(void* userdata)
{
    return imp_implementationWithBlock(^(id receiver, ...) {
        struct handler_description description;
        description.handler = NULL;
        description.description = userdata;
        va_list ap; 
        va_start(ap, receiver);
        nu_handler(0, &description, receiver, ap);
    }); 
}


#define MAKE_HANDLER_WITH_TYPE(type) \
static IMP handler_returning_ ## type (void* userdata) \
{ \
    return imp_implementationWithBlock(^(id receiver, ...) { \ 
        struct handler_description description; \
        description.handler = NULL; \
        description.description = userdata; \
        va_list ap; \
        va_start(ap, receiver); \
        type result; \
        nu_handler(&result, &description, receiver, ap); \
        return result; \
    }); \
}

MAKE_HANDLER_WITH_TYPE(id)
MAKE_HANDLER_WITH_TYPE(int)
MAKE_HANDLER_WITH_TYPE(bool)
MAKE_HANDLER_WITH_TYPE(float)
MAKE_HANDLER_WITH_TYPE(double)
MAKE_HANDLER_WITH_TYPE(CGRect)
MAKE_HANDLER_WITH_TYPE(CGPoint)
MAKE_HANDLER_WITH_TYPE(CGSize)
MAKE_HANDLER_WITH_TYPE(NSRange)