// RUN: %clang_cc1 -fsyntax-only -verify -Wno-bool-conversion %s
typedef __typeof__(((int*)0)-((int*)0)) ptrdiff_t;
namespace DontResolveTooEarly_WaitForOverloadResolution
{
template <class T> T* f(int); // #1
template <class T, class U> T& f(U); // #2
void g() {
int *ip = f<int>(1); // calls #1
}
template <class T>
T* f2(int);
template <class T, class U>
T& f2(U);
void g2() {
int*ip = (f2<int>)(1); // ok
}
} // End namespace
namespace DontAllowUnresolvedOverloadedExpressionInAnUnusedExpression
{
void one() { }
template<class T> void oneT() { }
void two() { } // expected-note 2 {{possible target for call}}
void two(int) { } // expected-note 2 {{possible target for call}}
template<class T> void twoT() { } // expected-note 2 {{possible target for call}}
template<class T> void twoT(T) { } // expected-note 2 {{possible target for call}}
void check()
{
one; // expected-warning {{expression result unused}}
two; // expected-error{{reference to overloaded function could not be resolved; did you mean to call it with no arguments?}}
oneT<int>; // expected-warning {{expression result unused}}
twoT<int>; // expected-error {{reference to overloaded function could not be resolved; did you mean to call it?}}
}
// check the template function case
template<class T> void check()
{
one; // expected-warning {{expression result unused}}
two; // expected-error{{reference to overloaded function could not be resolved; did you mean to call it with no arguments?}}
oneT<int>; // expected-warning {{expression result unused}}
twoT<int>; // expected-error {{reference to overloaded function could not be resolved; did you mean to call it?}}
}
}
template<typename T>
void twoT() { }
template<typename T, typename U>
void twoT(T) { }
void two() { }; //expected-note 5{{candidate}}
void two(int) { }; //expected-note 5{{candidate}}
void one() { }
template<class T>
void oneT() { }
template<class T>
void cant_resolve() { } //expected-note 3{{candidate}}
template<class T> void cant_resolve(T) { }//expected-note 3{{candidate}}
int main()
{
{ static_cast<void>(one); }
{ (void)(one); }
{ static_cast<void>(oneT<int>); }
{ (void)(oneT<int>); }
{ static_cast<void>(two); } // expected-error {{address of overloaded function 'two' cannot be static_cast to type 'void'}}
{ (void)(two); } // expected-error {{address of overloaded function 'two' cannot be cast to type 'void'}}
{ static_cast<void>(twoT<int>); }
{ (void)(twoT<int>); }
{ ptrdiff_t x = reinterpret_cast<ptrdiff_t>(oneT<int>); }
{ (void) reinterpret_cast<int (*)(char, double)>(oneT<int>); }
{ (void) reinterpret_cast<ptrdiff_t>(one); }
{ (void) reinterpret_cast<int (*)(char, double)>(one); }
{ ptrdiff_t x = reinterpret_cast<ptrdiff_t>(twoT<int>); }
{ (void) reinterpret_cast<int (*)(char, double)>(twoT<int>); }
{ (void) reinterpret_cast<void (*)(int)>(two); } //expected-error {{reinterpret_cast}}
{ (void) static_cast<void (*)(int)>(two); } //ok
{ (void) reinterpret_cast<int>(two); } //expected-error {{reinterpret_cast}}
{ (void) reinterpret_cast<int (*)(char, double)>(two); } //expected-error {{reinterpret_cast}}
{ bool b = (twoT<int>); }
{ bool b = (twoT<int, int>); }
{ bool b = &twoT<int>; //&foo<int>; }
b = &(twoT<int>); }
{ ptrdiff_t x = (ptrdiff_t) &twoT<int>;
x = (ptrdiff_t) &twoT<int>; }
{ ptrdiff_t x = (ptrdiff_t) twoT<int>;
x = (ptrdiff_t) twoT<int>; }
{ ptrdiff_t x = (ptrdiff_t) &twoT<int,int>;
x = (ptrdiff_t) &twoT<int>; }
{ oneT<int>; &oneT<int>; } //expected-warning 2{{expression result unused}}
{ static_cast<void>(cant_resolve<int>); } // expected-error {{address of overload}}
{ bool b = cant_resolve<int>; } // expected-error {{address of overload}}
{ (void) cant_resolve<int>; } // expected-error {{address of overload}}
}
namespace member_pointers {
struct S {
template <typename T> bool f(T) { return false; } // expected-note 4 {{possible target for call}}
template <typename T> static bool g(T) { return false; }
template <typename T> bool h(T) { return false; } // expected-note 3 {{possible target for call}}
template <int N> static bool h(int) { return false; } // expected-note 3 {{possible target for call}}
};
void test(S s) {
if (S::f<char>) return; // expected-error {{call to non-static member function without an object argument}}
if (S::f<int>) return; // expected-error {{call to non-static member function without an object argument}}
if (&S::f<char>) return;
if (&S::f<int>) return;
if (s.f<char>) return; // expected-error {{reference to non-static member function must be called}}
if (s.f<int>) return; // expected-error {{reference to non-static member function must be called}}
if (&s.f<char>) return; // expected-error {{cannot create a non-constant pointer to member function}}
if (&s.f<int>) return; // expected-error {{cannot create a non-constant pointer to member function}}
if (S::g<char>) return;
if (S::g<int>) return;
if (&S::g<char>) return;
if (&S::g<int>) return;
if (s.g<char>) return;
if (s.g<int>) return;
if (&s.g<char>) return;
if (&s.g<int>) return;
if (S::h<42>) return;
if (S::h<int>) return; // expected-error {{reference to overloaded function could not be resolved; did you mean to call it?}}
if (&S::h<42>) return;
if (&S::h<int>) return;
if (s.h<42>) return;
if (s.h<int>) return; // expected-error {{reference to overloaded function could not be resolved; did you mean to call it?}}
if (&s.h<42>) return;
if (&s.h<int>) return; // expected-error {{reference to overloaded function could not be resolved; did you mean to call it?}}
{ bool b = S::f<char>; } // expected-error {{call to non-static member function without an object argument}}
{ bool b = S::f<int>; } // expected-error {{call to non-static member function without an object argument}}
{ bool b = &S::f<char>; }
{ bool b = &S::f<int>; }
// These next two errors are terrible.
{ bool b = s.f<char>; } // expected-error {{reference to non-static member function must be called}}
{ bool b = s.f<int>; } // expected-error {{reference to non-static member function must be called}}
{ bool b = &s.f<char>; } // expected-error {{cannot create a non-constant pointer to member function}}
{ bool b = &s.f<int>; } // expected-error {{cannot create a non-constant pointer to member function}}
{ bool b = S::g<char>; }
{ bool b = S::g<int>; }
{ bool b = &S::g<char>; }
{ bool b = &S::g<int>; }
{ bool b = s.g<char>; }
{ bool b = s.g<int>; }
{ bool b = &s.g<char>; }
{ bool b = &s.g<int>; }
{ bool b = S::h<42>; }
{ bool b = S::h<int>; } // expected-error {{cannot form member pointer of type 'bool' without '&' and class name}}
{ bool b = &S::h<42>; }
{ bool b = &S::h<int>; }
{ bool b = s.h<42>; }
{ bool b = s.h<int>; } // expected-error {{cannot form member pointer of type 'bool' without '&' and class name}}
{ bool b = &s.h<42>; }
{ bool b = &s.h<int>; } // expected-error {{cannot form member pointer of type 'bool' without '&' and class name}}
}
}
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