I'm thinking of changing Marpa's ASF's (abstract forests) from alpha,
going directly from alpha to stable. These interfaces appear to work
and I've had no bugs reported for them. I probably will do further
experimentation with ASF's, but I don't want to do these experiments
inside Marpa::R2, which I'm trying to keep very low risk and stable. So
there seems to be no reason not to make the ASF's part of Marpa::R2's
stable interface.
The ASF's do play a role in the $recce->doit() method -- when
ambiguities are treated as errors, the ASF's allow Marpa::R2 to report
exactly where and why a parse is ambiguous.
Comments are welcome -- jeffrey
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