Restore Haskell GLR mode

BNFC / bnfc

BNF Converter

http://bnfc.digitalgrammars.com/

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Restore Haskell GLR mode #340

Closed andreasabel closed 3 years ago

andreasabel commented 3 years ago

With the hint in https://github.com/simonmar/happy/issues/173#issuecomment-778661448, the --glr mode can be tested again.

[x] Fix generated Makefile to drop happy options --ghc --coerce when --glr is used.
[x] Add imports needed by GLR-specific code to generated parser Test.

rachelambda commented 2 years ago

Sorry for commenting on this dead issue, but I'm rather confused. The output of bnfc --help (version 2.9.3) states that GLR parsing is deprecated

                --glr                   Output Happy GLR parser [deprecated]

Yet, this issue is closed. Is GLR parsing supported? I was unable to find any mention of this elsewhere.

andreasabel commented 2 years ago

Sorry for the confusion, @depsterr. It is still supported, but deprecated, because it is not supported well upstream (by happy).
In the future, the --glr option might be removed. So far, I am supporting it.