1 // RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s 2 3 template<typename T, typename U> 4 struct is_same { 5 static const bool value = false; 6 }; 7 8 template<typename T> 9 struct is_same<T, T> { 10 static const bool value = true; 11 }; 12 #define JOIN2(X,Y) X##Y 13 #define JOIN(X,Y) JOIN2(X,Y) 14 #define CHECK_EQUAL_TYPES(T1, T2) \ 15 int JOIN(array,__LINE__)[is_same<T1, T2>::value? 1 : -1] 16 17 int i; 18 typedef int& LRI; 19 typedef int&& RRI; 20 21 typedef LRI& r1; CHECK_EQUAL_TYPES(r1, int&); 22 typedef const LRI& r2; CHECK_EQUAL_TYPES(r2, int&); // expected-warning {{'const' qualifier on reference type 'LRI' (aka 'int &') has no effect}} 23 typedef const LRI&& r3; CHECK_EQUAL_TYPES(r3, int&); // expected-warning {{'const' qualifier on reference type 'LRI' (aka 'int &') has no effect}} 24 25 typedef RRI& r4; CHECK_EQUAL_TYPES(r4, int&); 26 typedef RRI&& r5; CHECK_EQUAL_TYPES(r5, int&&); 27