标准库头文件 <bitset>

 

C++

编译器支持

独立和托管

语言

标准库

标准库头文件

命名需求

功能测试宏 (C++20)

语言支持库

概念库 (C++20)

元编程库 (C++11)

诊断库

通用实用程序库

字符串库

容器库

迭代器库

范围库 (C++20)

算法库

数值库

本地化库

输入/输出库

文件系统库 (C++17)

正则表达式库 (C++11)

并发支持库 (C++11)

执行支持库 (C++26)

技术规范

符号索引

外部库

 

标准库头文件

语言支持
<cstddef> <cstdlib> <version> (C++20) <limits> <climits>	<cfloat> <cstdint> (C++11) <stdfloat> (C++23) <new> <typeinfo>	<source_location> (C++20) <exception> <initializer_list> (C++11) <compare> (C++20)	<coroutine> (C++20) <csignal> <csetjmp> <cstdarg>
概念
<concepts> (C++20)
诊断
<stdexcept> <stacktrace> (C++23)	<cassert>	<cerrno>	<system_error> (C++11)
内存管理
<memory>	<memory_resource> (C++17)	<scoped_allocator> (C++11)
元编程
<type_traits> (C++11)	<ratio> (C++11)
通用实用程序
<utility> <tuple> (C++11) <optional> (C++17) <variant> (C++17)	<any> (C++17) <debugging> (C++26) <expected> (C++23) <bitset>	<functional> <typeindex> (C++11) <execution> (C++17)	<charconv> (C++17) <format> (C++20) <bit> (C++20)
字符串
<string_view> (C++17) <string>	<cctype> <cwctype>	<cstring> <cwchar>	<cuchar> (C++11)
容器
<array> (C++11) <deque> <forward_list> (C++11) <list>	<vector> <map> <set> <unordered_map> (C++11)	<unordered_set> (C++11) <queue> <stack> <flat_map> (C++23)	<flat_set> (C++23) <span> (C++20) <mdspan> (C++23) <inplace_vector> (C++26)
迭代器
<iterator>
范围
<ranges> (C++20)	<generator> (C++23)
算法
<algorithm>	<numeric>
数值
<cfenv> (C++11) <complex>	<random> (C++11) <valarray>	<cmath> <linalg> (C++26)	<numbers> (C++20)
时间
<chrono> (C++11)	<ctime>
本地化
<locale>	<clocale>	<codecvt> (C++11/17/26*)	<text_encoding> (C++26)
输入/输出
<iosfwd> <iostream> <ios> <streambuf>	<istream> <ostream> <iomanip> <print> (C++23)	<sstream> <spanstream> (C++23) <fstream> <syncstream> (C++20)	<filesystem> (C++17) <cstdio> <cinttypes> (C++11) <strstream> (C++98/26*)
正则表达式
<regex> (C++11)
并发支持
<stop_token> (C++20) <thread> (C++11) <atomic> (C++11) <rcu> (C++26)	<stdatomic.h> (C++23) <mutex> (C++11) <shared_mutex> (C++14)	<condition_variable> (C++11)   <semaphore> (C++20) <latch> (C++20)	<barrier> (C++20) <future> (C++11) <hazard_pointer> (C++26)
C 兼容性
<cstdbool> (C++11/17/20*)   <ccomplex> (C++11/17/20*)	<ctgmath> (C++11/17/20*)	<cstdalign> (C++11/17/20*)	<ciso646> (直到 C++20)

 

此头文件是 通用实用程序 库的一部分。

包含
<string>	std::basic_string 类模板
<iosfwd>	输入/输出库中所有类的转发声明
类
bitset	实现固定长度位数组 (类模板)
std::hash<std::bitset> (C++11)	对 std::bitset 的哈希支持 (类模板特化)
前向声明
定义在头文件 <functional> 中
hash (C++11)	哈希函数对象 (类模板)
函数
operator&operator|operator^	对位集执行二进制逻辑运算 (函数模板)
operator<<operator>>	执行位集的流输入和输出 (函数模板)

概要

#include <string>
#include <iosfwd>   // for istream, ostream
 
namespace std {
  template<size_t N> class bitset;
 
  // bitset operators
  template<size_t N>
    constexpr bitset<N> operator&(const bitset<N>&, const bitset<N>&) noexcept;
  template<size_t N>
    constexpr bitset<N> operator|(const bitset<N>&, const bitset<N>&) noexcept;
  template<size_t N>
    constexpr bitset<N> operator^(const bitset<N>&, const bitset<N>&) noexcept;
  template<class CharT, class Traits, size_t N>
    basic_istream<CharT, Traits>&
      operator>>(basic_istream<CharT, Traits>& is, bitset<N>& x);
  template<class CharT, class Traits, size_t N>
    basic_ostream<CharT, Traits>&
      operator<<(basic_ostream<CharT, Traits>& os, const bitset<N>& x);
}

类模板 std::bitset

namespace std {
  template<size_t N> class bitset {
  public:
    // bit reference
    class reference {
      friend class bitset;
      constexpr reference() noexcept;
 
    public:
      constexpr reference(const reference&) = default;
      constexpr ~reference();
      constexpr reference& operator=(bool x) noexcept;              // for b[i] = x;
      constexpr reference& operator=(const reference&) noexcept;    // for b[i] = b[j];
      constexpr bool operator~() const noexcept;                    // flips the bit
      constexpr operator bool() const noexcept;                     // for x = b[i];
      constexpr reference& flip() noexcept;                         // for b[i].flip();
    };
 
    // constructors
    constexpr bitset() noexcept;
    constexpr bitset(unsigned long long val) noexcept;
    template<class CharT, class Traits, class Allocator>
      constexpr explicit bitset(
        const basic_string<CharT, Traits, Allocator>& str,
        typename basic_string<CharT, Traits, Allocator>::size_type pos = 0,
        typename basic_string<CharT, Traits, Allocator>::size_type n
          = basic_string<CharT, Traits, Allocator>::npos,
        CharT zero = CharT('0'),
        CharT one = CharT('1'));
    template<class CharT, class Traits>
      constexpr explicit bitset(
        basic_string_view<CharT, Traits> str,
        typename basic_string_view<CharT, Traits>::size_type pos = 0,
        typename basic_string_view<CharT, Traits>::size_type n
          = basic_string_view<CharT, Traits>::npos,
        CharT zero = CharT('0'),
        CharT one = CharT('1'));
    template<class CharT>
      constexpr explicit bitset(
        const CharT* str,
        typename basic_string_view<CharT>::size_type n = basic_string_view<CharT>::npos,
        CharT zero = CharT('0'),
        CharT one = CharT('1'));
 
    // bitset operations
    constexpr bitset& operator&=(const bitset& rhs) noexcept;
    constexpr bitset& operator|=(const bitset& rhs) noexcept;
    constexpr bitset& operator^=(const bitset& rhs) noexcept;
    constexpr bitset& operator<<=(size_t pos) noexcept;
    constexpr bitset& operator>>=(size_t pos) noexcept;
    constexpr bitset  operator<<(size_t pos) const noexcept;
    constexpr bitset  operator>>(size_t pos) const noexcept;
    constexpr bitset& set() noexcept;
    constexpr bitset& set(size_t pos, bool val = true);
    constexpr bitset& reset() noexcept;
    constexpr bitset& reset(size_t pos);
    constexpr bitset  operator~() const noexcept;
    constexpr bitset& flip() noexcept;
    constexpr bitset& flip(size_t pos);
 
    // element access
    constexpr bool operator[](size_t pos) const;
    constexpr reference operator[](size_t pos);
 
    constexpr unsigned long to_ulong() const;
    constexpr unsigned long long to_ullong() const;
    template<class CharT = char,
             class Traits = char_traits<CharT>,
             class Allocator = allocator<CharT>>
      constexpr basic_string<CharT, Traits, Allocator>
        to_string(CharT zero = CharT('0'), CharT one = CharT('1')) const;
 
    // observers
    constexpr size_t count() const noexcept;
    constexpr size_t size() const noexcept;
    constexpr bool operator==(const bitset& rhs) const noexcept;
    constexpr bool test(size_t pos) const;
    constexpr bool all() const noexcept;
    constexpr bool any() const noexcept;
    constexpr bool none() const noexcept;
  };
 
  // hash support
  template<class T> struct hash;
  template<size_t N> struct hash<bitset<N>>;
}