1 // RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s 2 3 // Various tests related to partial ordering of variadic templates. 4 template<typename ...Types> struct tuple; 5 6 template<typename Tuple> 7 struct X1 { 8 static const unsigned value = 0; 9 }; 10 11 template<typename Head, typename ...Tail> 12 struct X1<tuple<Head, Tail...> > { 13 static const unsigned value = 1; 14 }; 15 16 template<typename Head, typename ...Tail> 17 struct X1<tuple<Head, Tail&...> > { 18 static const unsigned value = 2; 19 }; 20 21 template<typename Head, typename ...Tail> 22 struct X1<tuple<Head&, Tail&...> > { 23 static const unsigned value = 3; 24 }; 25 26 int check0[X1<tuple<>>::value == 0? 1 : -1]; 27 int check1[X1<tuple<int>>::value == 2? 1 : -1]; 28 int check2[X1<tuple<int, int>>::value == 1? 1 : -1]; 29 int check3[X1<tuple<int, int&>>::value == 2? 1 : -1]; 30 int check4[X1<tuple<int&, int&>>::value == 3? 1 : -1]; 31 32 // Partial ordering of function templates. 33 template<typename T1, typename T2, typename ...Rest> 34 int &f0(T1, T2, Rest...); 35 36 template<typename T1, typename T2> 37 float &f0(T1, T2); 38 39 void test_f0() { 40 int &ir1 = f0(1, 2.0, 'a'); 41 float &fr1 = f0(1, 2.0); 42 } 43 44 template<typename T1, typename T2, typename ...Rest> 45 int &f1(T1, T2, Rest...); 46 47 template<typename T1, typename T2> 48 float &f1(T1, T2, ...); 49 50 void test_f1() { 51 int &ir1 = f1(1, 2.0, 'a'); 52 } 53 54 template<typename T1, typename T2, typename ...Rest> 55 int &f2(T1, T2, Rest...); 56 57 float &f2(...); 58 59 void test_f2() { 60 int &ir1 = f2(1, 2.0, 'a'); 61 } 62
