// without providing any attribute, as the generator doesn't 'know'
// what to output. The following assertion fires if this situation
// is detected in your code.
- BOOST_SPIRIT_ASSERT_MSG(false, bool_not_usable_without_attribute, ());
+ BOOST_SPIRIT_ASSERT_FAIL(OutputIterator, bool_not_usable_without_attribute, ());
return false;
}