• Simon Peyton Jones's avatar
    Turn AThing into ATcTyCon, in TcTyThing · a5cea73c
    Simon Peyton Jones authored
    This change tidies up and simplifies (a bit) the knot-tying
    when kind-checking groups of type and class declarations.
    
    The trouble (shown by Trac #11356) was that we wanted an error message
    (a kind-mismatch) that involved a type mentioned a (AThing k), which
    blew up.
    
    Since we now seem to have TcTyCons, I decided to use them here.
    It's still not great, but it's easier to understand and more robust.
    a5cea73c
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