1// PR c++/45923 2// { dg-do compile { target c++11 } } 3 4int f(int); 5 6template <class T> 7constexpr T g(T t) { return f(t); } // { dg-error "f.int" } 8 9int main() 10{ 11 constexpr int i = g(1); // { dg-error "g.T" } 12} 13 14// -------------------- 15 16struct complex // { dg-message "no constexpr constructor" } 17{ 18 complex(double r, double i) : re(r), im(i) { } 19 constexpr double real() const { return re; } // { dg-error "not a literal type" } 20 double imag() const { return im; } 21 22private: 23 double re; 24 double im; 25}; 26 27constexpr complex co1(0, 1); // { dg-error "not literal" } 28constexpr double dd2 = co1.real(); // { dg-error "non-constexpr function" } 29 30// -------------------- 31 32struct base // { dg-message "no constexpr constructor" } 33{ 34 int _M_i; 35 base() : _M_i(5) { } 36}; 37 38struct derived : public base // { dg-message "base class" } 39{ 40 constexpr derived(): base() { } // { dg-error "non-constexpr function" } 41}; 42 43constexpr derived obj; // { dg-error "not literal" } 44 45// -------------------- 46 47struct Def 48{ 49 int _M_i; // { dg-message "does not initialize" } 50 51 constexpr Def() = default; // { dg-error "implicit declaration is not constexpr" } 52}; 53 54constexpr Def defobj; // { dg-error "uninitialized" } 55