//===----------------------------------------------------------------------===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// #ifndef _LIBCPP___TYPE_TRAITS_IS_REFERENCEABLE_H #define _LIBCPP___TYPE_TRAITS_IS_REFERENCEABLE_H #include <__config> #include <__type_traits/integral_constant.h> #include <__type_traits/is_same.h> #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) # pragma GCC system_header #endif _LIBCPP_BEGIN_NAMESPACE_STD #if __has_builtin(__is_referenceable) template struct __libcpp_is_referenceable : integral_constant {}; #else struct __libcpp_is_referenceable_impl { template static _Tp& __test(int); template static false_type __test(...); }; template struct __libcpp_is_referenceable : integral_constant(0)), false_type>::value> { }; #endif // __has_builtin(__is_referenceable) _LIBCPP_END_NAMESPACE_STD #endif // _LIBCPP___TYPE_TRAITS_IS_REFERENCEABLE_H