79 lines
1.8 KiB
C++
79 lines
1.8 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify %s
|
|
struct A {
|
|
template <class T> operator T*();
|
|
};
|
|
|
|
template <class T> A::operator T*() { return 0; }
|
|
template <> A::operator char*(){ return 0; } // specialization
|
|
template A::operator void*(); // explicit instantiation
|
|
|
|
int main() {
|
|
A a;
|
|
int *ip;
|
|
ip = a.operator int*();
|
|
}
|
|
|
|
// PR5742
|
|
namespace PR5742 {
|
|
template <class T> struct A { };
|
|
template <class T> struct B { };
|
|
|
|
struct S {
|
|
template <class T> operator T();
|
|
} s;
|
|
|
|
void f() {
|
|
s.operator A<A<int> >();
|
|
s.operator A<B<int> >();
|
|
s.operator A<B<A<int> > >();
|
|
}
|
|
}
|
|
|
|
// PR5762
|
|
class Foo {
|
|
public:
|
|
template <typename T> operator T();
|
|
|
|
template <typename T>
|
|
T As() {
|
|
return this->operator T();
|
|
}
|
|
|
|
template <typename T>
|
|
T As2() {
|
|
return operator T();
|
|
}
|
|
|
|
int AsInt() {
|
|
return this->operator int();
|
|
}
|
|
};
|
|
|
|
template float Foo::As();
|
|
template double Foo::As2();
|
|
|
|
// Partial ordering with conversion function templates.
|
|
struct X0 {
|
|
template<typename T> operator T*() {
|
|
T x;
|
|
x = 17; // expected-error{{read-only variable is not assignable}}
|
|
}
|
|
|
|
template<typename T> operator T*() const; // expected-note{{explicit instantiation refers here}}
|
|
|
|
template<typename T> operator const T*() const {
|
|
T x = T();
|
|
return x; // expected-error{{cannot initialize return object of type 'char const *' with an lvalue of type 'char'}}
|
|
}
|
|
};
|
|
|
|
template X0::operator const char*() const; // expected-note{{'X0::operator char const *<char>' requested here}}
|
|
template X0::operator const int*(); // expected-note{{'X0::operator int const *<int const>' requested here}}
|
|
template X0::operator float*() const; // expected-error{{explicit instantiation of undefined function template}}
|
|
|
|
void test_X0(X0 x0, const X0 &x0c) {
|
|
x0.operator const int*();
|
|
x0.operator float *();
|
|
x0c.operator const char*();
|
|
}
|