| // -*- 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_INLINE_VISIBILITY |
| 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_INLINE_VISIBILITY |
| constexpr bool empty(const _Tp (&)[_Sz]) noexcept { return false; } |
| |
| template <class _Ep> |
| _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY |
| 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 |
