llvm-project/clang/test/SemaTemplate/extern-templates.cpp

65 lines
1009 B
C++

// RUN: %clang_cc1 -fsyntax-only -verify %s
template<typename T>
class X0 {
public:
void f(T t);
struct Inner {
void g(T t);
};
};
template<typename T>
void X0<T>::f(T t) {
t = 17; // expected-error{{incompatible}}
}
extern template class X0<int>;
extern template class X0<int*>;
template<typename T>
void X0<T>::Inner::g(T t) {
t = 17; // expected-error{{incompatible}}
}
void test_intptr(X0<int*> xi, X0<int*>::Inner xii) {
xi.f(0);
xii.g(0);
}
extern template class X0<long*>;
void test_longptr(X0<long*> xl, X0<long*>::Inner xli) {
xl.f(0);
xli.g(0);
}
template class X0<long*>; // expected-note 2{{instantiation}}
template<typename T>
class X1 {
public:
void f(T t) { t += 2; }
void g(T t);
};
template<typename T>
void X1<T>::g(T t) {
t += 2;
}
extern template class X1<void*>;
void g_X1(X1<void*> x1, void *ptr) {
x1.g(ptr);
}
extern template void X1<const void*>::g(const void*);
void g_X1_2(X1<const void *> x1, const void *ptr) {
x1.g(ptr);
}