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E2437: 'typename' should be followed by a qualified, dependent type name (C++)

Whenever the "typename" keyword is used in a template declaration or definition, it should always name a dependent type. For example:

Copy Code

    struct bar { };
    template<class T>
    class foo {
    typename T::A *x;// OK: names a qualified type
    typename T y;// error: not a qualified type
    typename bar z;// error: not a dependent type
    };

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