• Oleg Grenrus's avatar
    Resolve #6288 · e42e5462
    Oleg Grenrus authored
    - Add availableSince to language/extension fields
       - Also autogen-modules once we are on that.
    - Remove default-language check for cabal-version: 3.4
    We cannot make the field `uniqueFieldAlaDef`, as that would require
    specifying `default-language` in each subconditional.
    I leave it for https://github.com/haskell/cabal/issues/6925
    Note: the default language is whatever is the compiler's default.
    The GHC-8.10 default is its variant of Haskell2010
    with NondecreasingIndentation and without DatatypeContexts