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by jzimmerman64 1360 days ago
Correct. The C/C++ grammar is not complete; it only encodes the subset of the language that was needed to bootstrap langcc itself.

As far as I am aware, however, the Python grammar parses the full industrial language Python 3.9.12.
1 comments
defen 1360 days ago
Do you think it would be possible to use this tool to create a full C frontend (including preprocessor)? I imagine the difficult part would be passing preprocessed text (including generated source e.g. pasted tokens, and expansion locations) into the C parser.
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jzimmerman64 1359 days ago
The preprocessor would likely have to be a separate ad-hoc step, but it is possible that langcc could be used to generate a full C frontend if one is willing to run two passes (needed to deal with ambiguous cases such as "x * y", which can be either a multiplication expression or a variable declaration, depending on the contents of the symbol table).
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