forked from OSchip/llvm-project
59 lines
1.8 KiB
C++
59 lines
1.8 KiB
C++
// -*- 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()); }
|
|
|
|
// GCC complains about the implicit conversion from ptrdiff_t to size_t in
|
|
// the array bound.
|
|
_LIBCPP_DIAGNOSTIC_PUSH
|
|
_LIBCPP_GCC_DIAGNOSTIC_IGNORED("-Wsign-conversion")
|
|
template <class _Tp, ptrdiff_t _Sz>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
constexpr ptrdiff_t ssize(const _Tp (&)[_Sz]) noexcept { return _Sz; }
|
|
_LIBCPP_DIAGNOSTIC_POP
|
|
#endif
|
|
|
|
#endif // _LIBCPP_STD_VER > 14
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
#endif // _LIBCPP___ITERATOR_SIZE_H
|