Slava Pestov c46eb22fcd AST: Don't attach trailing where clause requirements to the GenericParamList ...

Previously we had two representations for the 'where' clause of a
parsed declaration; if the declaration had generic parameters of
its own, we would store them in the GenericParamList, otherwise
we would store them separately in a TrailingWhereClause instance.

Since the latter is more general and also used for protocols and
extensions, let's just use it for everything and simplify
GenericParamList in the process.

2020-07-28 02:07:16 -04:00

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