Erm just thought isnt this precisely where having a 'kind' definition would be useful... so we can specify which types are valid by membersip of a kind... (with reference to Simon PJs post about a 'kind' statement)

Playing with HsSyn types (like HsModule)... I have got down to the definition level like:

Sig id = Sig (Location name) (LHsDecl name)

what type is name? Presumably it can be a range of types, what are valid types for name?

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