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Now I tested and discussed with claude, and had a working version of
this project. The rest is to port the claude version to my own
writings. So this serves as the starting point before that attempt.
In the new attempt the design is better, and a number of bugs were
found and supposedly fixed, so let us see how this goes at the end.
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Previously the errors emitted while reading abnf grammars reported
incorrect indices. Now this is fixed.
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This bug caused a plain unambiguous grammar to become ambiguous.
Funnily enough, this bug revealed a lot of bugs in the code for
handling forests. I guess this is an unexpected surprise. :D
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Now the binding part is finished.
What remains is a bug encountered when planting a fragment to the
forest which intersects a packed node, which would lead to invalid
forests. This will also cause problem when planting a packed
fragment, but until now my testing grammars do not produce packed
fragments, so this problem is not encountered yet.
I am still figuring out efficient ways to solve this problem.
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