1 // PR c++/78244 2 // { dg-do compile { target c++11 } } 3 4 struct S { int d; }; 5 6 template <typename T> 7 auto f1() -> decltype(S{2.0}, void()) { } // { dg-error "narrowing conversion" } 8 9 template <typename T> 10 auto f2() -> decltype(S{2.0}, 1) { return 1; } // { dg-error "narrowing conversion" } 11 12 template <typename T> 13 auto f3() -> decltype(void(), S{2.0}, 1) { return 1; } // { dg-error "narrowing conversion" } 14 15 template <typename T> 16 auto f4() -> decltype((S{2.0}, 1)) { return 1; } // { dg-error "narrowing conversion" } 17