// -*- C++ -*- //===----------------------------------------------------------------------===// // // 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___ITERATOR_EMPTY_H #define _LIBCPP___ITERATOR_EMPTY_H #include <__config> #include <cstddef> #include <initializer_list> #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) # pragma GCC system_header #endif _LIBCPP_BEGIN_NAMESPACE_STD #if _LIBCPP_STD_VER >= 17 template <class _Cont> _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_HIDE_FROM_ABI constexpr auto empty(const _Cont& __c) _NOEXCEPT_(noexcept(__c.empty())) -> decltype(__c.empty()) { return __c.empty(); } template <class _Tp, size_t _Sz> _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_HIDE_FROM_ABI constexpr bool empty(const _Tp (&)[_Sz]) noexcept { return false; } template <class _Ep> _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_HIDE_FROM_ABI constexpr bool empty(initializer_list<_Ep> __il) noexcept { return __il.size() == 0; } #endif // _LIBCPP_STD_VER >= 17 _LIBCPP_END_NAMESPACE_STD #endif // _LIBCPP___ITERATOR_EMPTY_H