1 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s 2 3 template <class T> 4 struct only 5 { 6 only(T) {} 7 8 template <class U> 9 only(U) 10 { 11 static_assert(sizeof(U) == 0, "expected type failure"); 12 } 13 }; 14 15 auto f() -> int 16 { 17 return 0; 18 } 19 20 auto g(); // expected-error{{return without trailing return type}} 21 22 int h() -> int; // expected-error{{trailing return type must specify return type 'auto', not 'int'}} 23 24 int x; 25 26 template <class T> 27 auto i(T x) -> decltype(x) 28 { 29 return x; 30 } 31 32 only<double> p1 = i(1.0); 33 34 template <class T> 35 struct X 36 { 37 auto f(T x) -> T { return x; } 38 39 template <class U> 40 auto g(T x, U y) -> decltype(x + y) 41 { 42 return x + y; 43 } 44 45 template<typename U> 46 struct nested { 47 template <class V> 48 auto h(T x, U y, V z) -> decltype(x + y + z) 49 { 50 return x + y + z; 51 } 52 }; 53 54 template<typename U> 55 nested<U> get_nested(); 56 }; 57 58 X<int> xx; 59 only<int> p2 = xx.f(0L); 60 only<double> p3 = xx.g(0L, 1.0); 61 only<double> p4 = xx.get_nested<double>().h(0L, 1.0, 3.14f); 62
