[m-dev.] Fw: Replacement syntax for DCGs

[Michael Day]

> It does have the advantage that it makes the threading explicit and
> costs no more than would be the case for an imperative language, for
> example.
> 
> Personally, I'd prefer some explicit notation over hidden threading.

Seems better than EDCGs, and a plausible alternative to DCGs that would be 
better in many circumstances. Would it be possible to use the ! operator 
for anything else without clashes?

Michael

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