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// { dg-do compile { target c++11 } }
// { dg-options "" }
namespace std {
constexpr inline bool
is_constant_evaluated () noexcept
{
return __builtin_is_constant_evaluated ();
}
}
struct A { explicit (!__builtin_is_constant_evaluated ()) A (int); }; // { dg-warning "'explicit\\(bool\\)' only available with" "" { target c++17_down } }
struct B { explicit (!std::is_constant_evaluated ()) B (int); }; // { dg-warning "'explicit\\(bool\\)' only available with" "" { target c++17_down } }
struct C { explicit (__builtin_is_constant_evaluated ()) C (int); }; // { dg-warning "'explicit\\(bool\\)' only available with" "" { target c++17_down } }
struct D { explicit (std::is_constant_evaluated ()) D (int); }; // { dg-warning "'explicit\\(bool\\)' only available with" "" { target c++17_down } }
A a = 1;
B b = 2;
C c = 3; // { dg-error "conversion from 'int' to non-scalar type 'C' requested" }
D d = 4; // { dg-error "conversion from 'int' to non-scalar type 'D' requested" }
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