标准库头文件 <bitset>
来自cppreference.com
此头文件是通用工具库的一部分。
包含 | |
| std::basic_string 类模板 | |
| 输入/输出库中所有类的前置声明 | |
类 | |
| 实现常量长度的位数组 (类模板) | |
| (C++11) |
std::bitset 的散列支持 (类模板特化) |
前置声明 | |
| 定义于头文件
<functional> | |
| (C++11) |
散列函数对象 (类模板) |
函数 | |
| 在 bitset 上执行二元逻辑操作 (函数) | |
| 执行 bitset 的流输入和输出 (函数) | |
概要
#include <string> #include <iosfwd> // 为 istream 、 ostream namespace std { template<size_t N> class bitset; // bitset 运算符 template<size_t N> bitset<N> operator&(const bitset<N>&, const bitset<N>&) noexcept; template<size_t N> bitset<N> operator|(const bitset<N>&, const bitset<N>&) noexcept; template<size_t N> 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: // 位引用 class reference { friend class bitset; reference() noexcept; public: reference(const reference&) = default; ~reference(); reference& operator=(bool x) noexcept; // 针对 b[i] = x; reference& operator=(const reference&) noexcept; // 针对 b[i] = b[j]; bool operator~() const noexcept; // 翻转位 operator bool() const noexcept; // 针对 x = b[i]; reference& flip() noexcept; // 针对 b[i].flip(); }; // 构造函数 constexpr bitset() noexcept; constexpr bitset(unsigned long long val) noexcept; template<class CharT, class Traits, class Allocator> 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> explicit bitset( const charT* str, typename basic_string<CharT>::size_type n = basic_string<CharT>::npos, CharT zero = CharT('0'), CharT one = CharT('1')); // bitset 操作 bitset& operator&=(const bitset& rhs) noexcept; bitset& operator|=(const bitset& rhs) noexcept; bitset& operator^=(const bitset& rhs) noexcept; bitset& operator<<=(size_t pos) noexcept; bitset& operator>>=(size_t pos) noexcept; bitset& set() noexcept; bitset& set(size_t pos, bool val = true); bitset& reset() noexcept; bitset& reset(size_t pos); bitset operator~() const noexcept; bitset& flip() noexcept; bitset& flip(size_t pos); // 元素访问 constexpr bool operator[](size_t pos) const; // 针对 b[i]; reference operator[](size_t pos); // 针对 b[i]; unsigned long to_ulong() const; unsigned long long to_ullong() const; template<class CharT = char, class Traits = char_Traits<CharT>, class Allocator = allocator<CharT>> basic_string<CharT, Traits, Allocator> to_string(CharT zero = CharT('0'), CharT one = CharT('1')) const; size_t count() const noexcept; constexpr size_t size() const noexcept; bool operator==(const bitset& rhs) const noexcept; bool test(size_t pos) const; bool all() const noexcept; bool any() const noexcept; bool none() const noexcept; bitset operator<<(size_t pos) const noexcept; bitset operator>>(size_t pos) const noexcept; }; // 散列支持 template<class T> struct hash; template<size_t N> struct hash<bitset<N>>; }