1fe6060f1SDimitry Andric // -*- C++ -*- 2fe6060f1SDimitry Andric //===----------------------------------------------------------------------===// 3fe6060f1SDimitry Andric // 4fe6060f1SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5fe6060f1SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 6fe6060f1SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7fe6060f1SDimitry Andric // 8fe6060f1SDimitry Andric //===----------------------------------------------------------------------===// 9fe6060f1SDimitry Andric 10fe6060f1SDimitry Andric #ifndef _LIBCPP___ITERATOR_EMPTY_H 11fe6060f1SDimitry Andric #define _LIBCPP___ITERATOR_EMPTY_H 12fe6060f1SDimitry Andric 13fe6060f1SDimitry Andric #include <__config> 14fe6060f1SDimitry Andric #include <cstddef> 15fe6060f1SDimitry Andric #include <initializer_list> 16fe6060f1SDimitry Andric 17fe6060f1SDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 18fe6060f1SDimitry Andric # pragma GCC system_header 19fe6060f1SDimitry Andric #endif 20fe6060f1SDimitry Andric 21fe6060f1SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 22fe6060f1SDimitry Andric 2306c3fb27SDimitry Andric #if _LIBCPP_STD_VER >= 17 24fe6060f1SDimitry Andric 25fe6060f1SDimitry Andric template <class _Cont> 26*0fca6ea1SDimitry Andric [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr auto 27*0fca6ea1SDimitry Andric empty(const _Cont& __c) noexcept(noexcept(__c.empty())) -> decltype(__c.empty()) { 28cb14a3feSDimitry Andric return __c.empty(); 29cb14a3feSDimitry Andric } 30fe6060f1SDimitry Andric 31fe6060f1SDimitry Andric template <class _Tp, size_t _Sz> empty(const _Tp (&)[_Sz])32*0fca6ea1SDimitry Andric[[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool empty(const _Tp (&)[_Sz]) noexcept { 33cb14a3feSDimitry Andric return false; 34cb14a3feSDimitry Andric } 35fe6060f1SDimitry Andric 36fe6060f1SDimitry Andric template <class _Ep> empty(initializer_list<_Ep> __il)37*0fca6ea1SDimitry Andric[[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool empty(initializer_list<_Ep> __il) noexcept { 38cb14a3feSDimitry Andric return __il.size() == 0; 39cb14a3feSDimitry Andric } 40fe6060f1SDimitry Andric 4106c3fb27SDimitry Andric #endif // _LIBCPP_STD_VER >= 17 42fe6060f1SDimitry Andric 43fe6060f1SDimitry Andric _LIBCPP_END_NAMESPACE_STD 44fe6060f1SDimitry Andric 45fe6060f1SDimitry Andric #endif // _LIBCPP___ITERATOR_EMPTY_H 46