void test() {
g1(X1());
g2(X2()); // expected-warning{{C++98 requires an accessible copy constructor for class 'X2' when binding a reference to a temporary; was private}}
g3(X3()); // expected-warning{{no viable constructor copying parameter of type 'X3'}}
g4(X4<int>());
g5(X5()); // Generates a warning in the default argument.
}
{
constexpr operator double() const { return 1.0; }
};
struct X5
{
constexpr operator int() const { return __INT_MAX__; }
constexpr operator unsigned() const { return __INT_MAX__ * 2U + 1; }
};
enum E0 { e0 = X0() };
enum E1 { e1 = X1() };
enum E2 { e2 = X2() };
enum E3 { e3 = X3() };
enum E4 { e4 = X4() }; // { dg-error "integer constant" }
enum E5 { e5 = X5() }; // { dg-error "ambiguous" }
enum F0 : int { f0 = X0() };
enum F1 : int { f1 = X1() };
enum F2 : int { f2 = X2() };
enum F3 : int { f3 = X3() };
enum F4 : int { f4 = X4() }; // { dg-error "narrowing" }
enum F5 : int { f5 = X5() };
enum G0 : signed char { g0 = X0() };
enum G1 : signed char { g1 = X1() };
enum G2 : signed char { g2 = X2() }; // { dg-error "narrowing" }
enum G3 : signed char { g3 = X3() }; // { dg-error "narrowing" }
enum G4 : signed char { g4 = X4() }; // { dg-error "narrowing" }
enum G5 : signed char { g5 = X5() }; // { dg-error "ambiguous" }