1e78f53d1SNikolas Klauser // -*- C++ -*- 2e78f53d1SNikolas Klauser //===----------------------------------------------------------------------===// 3e78f53d1SNikolas Klauser // 4e78f53d1SNikolas Klauser // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5e78f53d1SNikolas Klauser // See https://llvm.org/LICENSE.txt for license information. 6e78f53d1SNikolas Klauser // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7e78f53d1SNikolas Klauser // 8e78f53d1SNikolas Klauser //===----------------------------------------------------------------------===// 9e78f53d1SNikolas Klauser 10*ce777190SNikolas Klauser #ifndef _LIBCPP___CXX03___ITERATOR_EMPTY_H 11*ce777190SNikolas Klauser #define _LIBCPP___CXX03___ITERATOR_EMPTY_H 12e78f53d1SNikolas Klauser 1373fbae83SNikolas Klauser #include <__cxx03/__config> 1473fbae83SNikolas Klauser #include <__cxx03/cstddef> 1573fbae83SNikolas Klauser #include <__cxx03/initializer_list> 16e78f53d1SNikolas Klauser 17e78f53d1SNikolas Klauser #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 18e78f53d1SNikolas Klauser # pragma GCC system_header 19e78f53d1SNikolas Klauser #endif 20e78f53d1SNikolas Klauser 21e78f53d1SNikolas Klauser _LIBCPP_BEGIN_NAMESPACE_STD 22e78f53d1SNikolas Klauser 23e78f53d1SNikolas Klauser #if _LIBCPP_STD_VER >= 17 24e78f53d1SNikolas Klauser 25e78f53d1SNikolas Klauser template <class _Cont> 26e78f53d1SNikolas Klauser [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr auto 27e78f53d1SNikolas Klauser empty(const _Cont& __c) noexcept(noexcept(__c.empty())) -> decltype(__c.empty()) { 28e78f53d1SNikolas Klauser return __c.empty(); 29e78f53d1SNikolas Klauser } 30e78f53d1SNikolas Klauser 31e78f53d1SNikolas Klauser template <class _Tp, size_t _Sz> 32e78f53d1SNikolas Klauser [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool empty(const _Tp (&)[_Sz]) noexcept { 33e78f53d1SNikolas Klauser return false; 34e78f53d1SNikolas Klauser } 35e78f53d1SNikolas Klauser 36e78f53d1SNikolas Klauser template <class _Ep> 37e78f53d1SNikolas Klauser [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool empty(initializer_list<_Ep> __il) noexcept { 38e78f53d1SNikolas Klauser return __il.size() == 0; 39e78f53d1SNikolas Klauser } 40e78f53d1SNikolas Klauser 41e78f53d1SNikolas Klauser #endif // _LIBCPP_STD_VER >= 17 42e78f53d1SNikolas Klauser 43e78f53d1SNikolas Klauser _LIBCPP_END_NAMESPACE_STD 44e78f53d1SNikolas Klauser 45*ce777190SNikolas Klauser #endif // _LIBCPP___CXX03___ITERATOR_EMPTY_H 46