1// -*- C++ -*-
2//===----------------------------------------------------------------------===//
3//
4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5// See https://llvm.org/LICENSE.txt for license information.
6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7//
8//===---------------------------------------------------------------------===//
9
10#ifndef _LIBCPP_BIT
11#define _LIBCPP_BIT
12
13/*
14    bit synopsis
15
16namespace std {
17  // [bit.cast], bit_cast
18  template<class To, class From>
19    constexpr To bit_cast(const From& from) noexcept; // C++20
20
21  // [bit.byteswap], byteswap
22  template<class T>
23    constexpr T byteswap(T value) noexcept;      // C++23
24
25  // [bit.pow.two], integral powers of 2
26  template <class T>
27    constexpr bool has_single_bit(T x) noexcept; // C++20
28  template <class T>
29    constexpr T bit_ceil(T x);                   // C++20
30  template <class T>
31    constexpr T bit_floor(T x) noexcept;         // C++20
32  template <class T>
33    constexpr int bit_width(T x) noexcept;       // C++20
34
35  // [bit.rotate], rotating
36  template<class T>
37    constexpr T rotl(T x, unsigned int s) noexcept; // C++20
38  template<class T>
39    constexpr T rotr(T x, unsigned int s) noexcept; // C++20
40
41  // [bit.count], counting
42  template<class T>
43    constexpr int countl_zero(T x) noexcept;  // C++20
44  template<class T>
45    constexpr int countl_one(T x) noexcept;   // C++20
46  template<class T>
47    constexpr int countr_zero(T x) noexcept;  // C++20
48  template<class T>
49    constexpr int countr_one(T x) noexcept;   // C++20
50  template<class T>
51    constexpr int popcount(T x) noexcept;     // C++20
52
53  // [bit.endian], endian
54  enum class endian {
55    little = see below,        // C++20
56    big = see below,           // C++20
57    native = see below         // C++20
58  };
59
60} // namespace std
61
62*/
63
64#include <__assert> // all public C++ headers provide the assertion handler
65#include <__bit/bit_cast.h>
66#include <__bit/bit_ceil.h>
67#include <__bit/bit_floor.h>
68#include <__bit/bit_log2.h>
69#include <__bit/bit_width.h>
70#include <__bit/blsr.h>
71#include <__bit/byteswap.h>
72#include <__bit/countl.h>
73#include <__bit/countr.h>
74#include <__bit/endian.h>
75#include <__bit/has_single_bit.h>
76#include <__bit/popcount.h>
77#include <__bit/rotate.h>
78#include <__config>
79#include <version>
80
81#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
82#  pragma GCC system_header
83#endif
84
85#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
86#  include <cstdlib>
87#  include <iosfwd>
88#  include <limits>
89#  include <type_traits>
90#endif
91
92#endif // _LIBCPP_BIT
93