//===----------------------------------------------------------------------===// // // 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___BIT_BIT_WIDTH_H #define _LIBCPP___BIT_BIT_WIDTH_H #include <__bit/bit_log2.h> #include <__concepts/arithmetic.h> #include <__config> #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) # pragma GCC system_header #endif #if _LIBCPP_STD_VER >= 20 _LIBCPP_BEGIN_NAMESPACE_STD template <__libcpp_unsigned_integer _Tp> [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr int bit_width(_Tp __t) noexcept { return __t == 0 ? 0 : std::__bit_log2(__t) + 1; } _LIBCPP_END_NAMESPACE_STD #endif // _LIBCPP_STD_VER >= 20 #endif // _LIBCPP___BIT_BIT_WIDTH_H