| // -*- 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_SIZE_H |
| #define _LIBCPP___ITERATOR_SIZE_H |
| |
| #include <__config> |
| #include <cstddef> |
| #include <type_traits> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| #pragma GCC system_header |
| #endif |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| #if _LIBCPP_STD_VER > 14 |
| |
| template <class _Cont> |
| _LIBCPP_INLINE_VISIBILITY |
| constexpr auto size(const _Cont& __c) |
| _NOEXCEPT_(noexcept(__c.size())) |
| -> decltype (__c.size()) |
| { return __c.size(); } |
| |
| template <class _Tp, size_t _Sz> |
| _LIBCPP_INLINE_VISIBILITY |
| constexpr size_t size(const _Tp (&)[_Sz]) noexcept { return _Sz; } |
| |
| #if _LIBCPP_STD_VER > 17 |
| template <class _Cont> |
| _LIBCPP_INLINE_VISIBILITY |
| constexpr auto ssize(const _Cont& __c) |
| _NOEXCEPT_(noexcept(static_cast<common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>>>(__c.size()))) |
| -> common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>> |
| { return static_cast<common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>>>(__c.size()); } |
| |
| template <class _Tp, ptrdiff_t _Sz> |
| _LIBCPP_INLINE_VISIBILITY |
| constexpr ptrdiff_t ssize(const _Tp (&)[_Sz]) noexcept { return _Sz; } |
| #endif |
| |
| #endif // _LIBCPP_STD_VER > 14 |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP___ITERATOR_SIZE_H |
