llvm-project/clang/test/SemaTemplate/explicit-instantiation.cpp

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// RUN: %clang_cc1 -fsyntax-only -verify %s
template void *; // expected-error{{expected unqualified-id}}
template typedef void f0; // expected-error{{explicit instantiation of typedef}}
int v0; // expected-note{{refers here}}
template int v0; // expected-error{{does not refer}}
template<typename T>
struct X0 {
static T value;
T f0(T x) {
return x + 1; // expected-error{{invalid operands}}
}
T* f0(T*, T*) { return T(); }
template<typename U>
T f0(T, U) { return T(); }
};
template<typename T>
T X0<T>::value; // expected-error{{no matching constructor}}
template int X0<int>::value;
struct NotDefaultConstructible { // expected-note{{candidate function}}
NotDefaultConstructible(int); // expected-note{{candidate function}}
};
template NotDefaultConstructible X0<NotDefaultConstructible>::value; // expected-note{{instantiation}}
template int X0<int>::f0(int);
template int* X0<int>::f0(int*, int*);
template int X0<int>::f0(int, float);
template int X0<int>::f0(int) const; // expected-error{{does not refer}}
template int* X0<int>::f0(int*, float*); // expected-error{{does not refer}}
struct X1 { };
typedef int X1::*MemPtr;
template MemPtr X0<MemPtr>::f0(MemPtr); // expected-note{{requested here}}
struct X2 {
int f0(int); // expected-note{{refers here}}
template<typename T> T f1(T) { return T(); }
template<typename T> T* f1(T*) { return 0; }
template<typename T, typename U> void f2(T, U*) { } // expected-note{{candidate}}
template<typename T, typename U> void f2(T*, U) { } // expected-note{{candidate}}
};
template int X2::f0(int); // expected-error{{not an instantiation}}
template int *X2::f1(int *); // okay
template void X2::f2(int *, int *); // expected-error{{ambiguous}}
template<typename T> void print_type() { }
template void print_type<int>();
template void print_type<float>();
template<typename T> void print_type(T*) { }
template void print_type(int*);
template void print_type<int>(float*); // expected-error{{does not refer}}
void print_type(double*);
template void print_type<double>(double*);
// PR5069
template<int I> void foo0 (int (&)[I + 1]) { }
template void foo0<2> (int (&)[3]);