[cfe-commits] [PATCH] Fix handling of dependent nested namespace specifiers in UsingDecls during template instantiation

[Martin Vejnár]

Hi, this patch fixes what is written in subject. In particular, the
following program

    template <typename T> struct t {
      struct s1 {
        T f1();
      };
      struct s2 : s1 {
        using s1::f1;
      };
    };

    template struct t<int>;

is now parsed without errors. Originally, no substitution was performed on
`s1` in the UsingDecl, which resulted in an error (t<T>::s1 is not a base
class of t<int>::s2).

A test case is included as well.
-- 
Martin
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