llvm-project

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// RUN: %clang_cc1 -std=c++1z -verify %s
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namespace A {
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  int m, n;
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};
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namespace B {
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  using A::m, A::n, A::n;
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  int q = m + n;
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}
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struct X {
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  int x1, x2, y, z; // expected-note 2{{conflicting}}
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};
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struct Y {
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  int x1, x2, y, z; // expected-note 2{{target}}
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};
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struct Z : X, Y {
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  using X::x1,
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        blah::blah, // expected-error {{undeclared}}
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        X::x2, // expected-note {{previous}}
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        Y::y,
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        X::x2, // expected-error {{redeclaration}}
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        X::z,
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        Y::z; // expected-error {{conflicts with}}
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};
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int X::*px1 = &Z::x1;
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int X::*px2 = &Z::x2;
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int Y::*py = &Z::y;
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int X::*pz = &Z::z;
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template<typename ...T> struct Q : T... {
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  using T::z...; // expected-error {{conflicts}}
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};
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Q<X,Y> q; // expected-note {{instantiation of}}
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