1 // RUN: %clang_cc1 -fsyntax-only -verify %s 2 3 template<typename T> 4 struct X0 { 5 void f(); 6 7 template<typename U> 8 void g(U); 9 10 struct Nested { 11 }; 12 13 static T member; 14 }; 15 16 int &use_X0_int(X0<int> x0i, // expected-note{{implicit instantiation first required here}} 17 int i) { 18 x0i.f(); // expected-note{{implicit instantiation first required here}} 19 x0i.g(i); // expected-note{{implicit instantiation first required here}} 20 X0<int>::Nested nested; // expected-note{{implicit instantiation first required here}} 21 return X0<int>::member; // expected-note{{implicit instantiation first required here}} 22 } 23 24 template<> 25 void X0<int>::f() { // expected-error{{after instantiation}} 26 } 27 28 template<> template<> 29 void X0<int>::g(int) { // expected-error{{after instantiation}} 30 } 31 32 template<> 33 struct X0<int>::Nested { }; // expected-error{{after instantiation}} 34 35 template<> 36 int X0<int>::member = 17; // expected-error{{after instantiation}} 37 38 template<> 39 struct X0<int> { }; // expected-error{{after instantiation}} 40 41 // Example from the standard 42 template<class T> class Array { /* ... */ }; 43 44 template<class T> void sort(Array<T>& v) { /* ... */ } 45 46 struct String {}; 47 48 void f(Array<String>& v) { 49 50 sort(v); // expected-note{{required}} 51 // use primary template 52 // sort(Array<T>&), T is String 53 } 54 55 template<> void sort<String>(Array<String>& v); // // expected-error{{after instantiation}} 56 template<> void sort<>(Array<char*>& v); // OK: sort<char*> not yet used 57 58 namespace PR6160 { 59 template<typename T> void f(T); 60 template<> void f(int); 61 extern template void f(int); 62 template<> void f(int) { } 63 } 64
