16f1daa46SRichard Smith // RUN: %clang_cc1 -std=c++1z -verify %s 26f1daa46SRichard Smith 36f1daa46SRichard Smith namespace A { 46f1daa46SRichard Smith int m, n; 56f1daa46SRichard Smith }; 66f1daa46SRichard Smith 76f1daa46SRichard Smith namespace B { 86f1daa46SRichard Smith using A::m, A::n, A::n; 96f1daa46SRichard Smith int q = m + n; 106f1daa46SRichard Smith } 116f1daa46SRichard Smith 126f1daa46SRichard Smith struct X { 13*151c4568SRichard Smith int x1, x2, y, z; // expected-note 2{{conflicting}} 146f1daa46SRichard Smith }; 156f1daa46SRichard Smith struct Y { 16*151c4568SRichard Smith int x1, x2, y, z; // expected-note 2{{target}} 176f1daa46SRichard Smith }; 186f1daa46SRichard Smith struct Z : X, Y { 196f1daa46SRichard Smith using X::x1, 206f1daa46SRichard Smith blah::blah, // expected-error {{undeclared}} 216f1daa46SRichard Smith X::x2, // expected-note {{previous}} 226f1daa46SRichard Smith Y::y, 236f1daa46SRichard Smith X::x2, // expected-error {{redeclaration}} 246f1daa46SRichard Smith X::z, 256f1daa46SRichard Smith Y::z; // expected-error {{conflicts with}} 266f1daa46SRichard Smith }; 276f1daa46SRichard Smith int X::*px1 = &Z::x1; 286f1daa46SRichard Smith int X::*px2 = &Z::x2; 296f1daa46SRichard Smith int Y::*py = &Z::y; 306f1daa46SRichard Smith int X::*pz = &Z::z; 31*151c4568SRichard Smith 32*151c4568SRichard Smith template<typename ...T> struct Q : T... { 33*151c4568SRichard Smith using T::z...; // expected-error {{conflicts}} 34*151c4568SRichard Smith }; 35*151c4568SRichard Smith Q<X,Y> q; // expected-note {{instantiation of}} 36