> If you don't want to accept grammars that may be ambiguous, you lose generality. [...] Yes, this was the entire point of my message. > Which is why prioriti

> If you don't want to accept grammars that may be ambiguous, you lose generality. [...] Yes, this was the entire point of my message. > Which is why prioritised choice is so appealing to me. It gives control to the user, should any ambiguity arise. I agree that prioritized choice is a nice tool for resolving ambiguities. But I don't like PEGs, because everything has to be defined in terms of prioritized choice. That means you don't know if there are ambiguities are not.