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// RUN: clang-cc -fsyntax-only -verify %s
template<typename T>
class X {
public:
void f(T x); // expected-error{{argument may not have 'void' type}}
void g(T*);
static int h(T, T); // expected-error 2{{argument may not have 'void' type}}
};
int identity(int x) { return x; }
void test(X<int> *xi, int *ip, X<int(int)> *xf) {
xi->f(17);
xi->g(ip);
xf->f(&identity);
xf->g(identity);
X<int>::h(17, 25);
X<int(int)>::h(identity, &identity);
}
void test_bad() {
X<void> xv; // expected-note{{in instantiation of template class 'class X<void>' requested here}}
}
template<typename T, typename U>
class Overloading {
public:
int& f(T, T); // expected-note{{previous declaration is here}}
float& f(T, U); // expected-error{{functions that differ only in their return type cannot be overloaded}}
};
void test_ovl(Overloading<int, long> *oil, int i, long l) {
int &ir = oil->f(i, i);
float &fr = oil->f(i, l);
}
void test_ovl_bad() {
Overloading<float, float> off; // expected-note{{in instantiation of template class 'class Overloading<float, float>' requested here}}
}
template<typename T>
class HasDestructor {
public:
virtual ~HasDestructor() = 0;
};
int i = sizeof(HasDestructor<int>); // FIXME: forces instantiation, but
// the code below should probably instantiate by itself.
int abstract_destructor[__is_abstract(HasDestructor<int>)? 1 : -1];
template<typename T>
class Constructors {
public:
Constructors(const T&);
Constructors(const Constructors &other);
};
void test_constructors() {
Constructors<int> ci1(17);
Constructors<int> ci2 = ci1;
}
template<typename T>
struct ConvertsTo {
operator T();
};
void test_converts_to(ConvertsTo<int> ci, ConvertsTo<int *> cip) {
int i = ci;
int *ip = cip;
}
// PR4660
template<class T> struct A0 { operator T*(); };
template<class T> struct A1;
int *a(A0<int> &x0, A1<int> &x1) {
int *y0 = x0;
int *y1 = x1; // expected-error{{initializing}}
}
struct X0Base {
int &f();
int& g(int);
static double &g(double);
};
template<typename T>
struct X0 : X0Base {
};
template<typename U>
struct X1 : X0<U> {
int &f2() {
return X0Base::f();
}
};
void test_X1(X1<int> x1i) {
int &ir = x1i.f2();
}
template<typename U>
struct X2 : X0Base, U {
int &f2() { return X0Base::f(); }
};
template<typename T>
struct X3 {
void test(T x) {
double& d1 = X0Base::g(x);
}
};
template struct X3<double>;
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