3 ms·

It includes a grammar for Python but says it has some limitations, so maybe, sort of. Amusingly, the included C grammar is shorter than the Python grammar. Rub

• defen 4y ago
  The C grammar is also not complete, so it doesn't necessarily mean anything that it's shorter than the Python one.
  • jzimmerman64 4y 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.
    • defen 4y 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.
      • jzimmerman64 4y 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).