48 lines · cpp
1// RUN: %clang_cc1 -fsyntax-only -verify %s2 3template<typename T> inline void f(T) { }4template void f(int); // expected-note{{previous explicit instantiation}}5template void f(int); // expected-error{{duplicate explicit instantiation}}6 7template<typename T>8struct X0 {9 union Inner { };10 11 void f(T) { }12 13 static T value;14};15 16template<typename T>17T X0<T>::value = 3.14; // expected-warning{{implicit conversion from 'double' to 'int' changes value from 3.14 to 3}}18 19template struct X0<int>; // expected-note{{previous explicit instantiation}} \20 expected-note{{requested here}}21template struct X0<int>; // expected-error{{duplicate explicit instantiation}}22 23template void X0<float>::f(float); // expected-note{{previous explicit instantiation}}24template void X0<float>::f(float); // expected-error{{duplicate explicit instantiation}}25 26template union X0<float>::Inner; // expected-note{{previous explicit instantiation}}27template union X0<float>::Inner; // expected-error{{duplicate explicit instantiation}}28 29template float X0<float>::value; // expected-note{{previous explicit instantiation}}30template float X0<float>::value; // expected-error{{duplicate explicit instantiation}}31 32// Make sure that we don't get tricked by redeclarations of nested classes.33namespace NestedClassRedecls {34 template<typename T>35 struct X {36 struct Nested;37 friend struct Nested;38 39 struct Nested { 40 Nested() {}41 } nested;42 };43 44 X<int> xi;45 46 template struct X<int>;47}48