标准库头文件 <spanstream>
来自cppreference.com
此头文件是输入/输出库的一部分。
类 | |
(C++23) |
实现原始固定字符缓冲区设备 (类模板) |
(C++23) |
实现固定字符缓冲区输入操作 (类模板) |
(C++23) |
实现固定字符缓冲区输出操作 (类模板) |
(C++23) |
实现固定字符缓冲区输入/输出操作 (类模板) |
spanbuf (C++23)
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std::basic_spanbuf<char> (typedef) |
wspanbuf (C++23)
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std::basic_spanbuf<wchar_t> (typedef) |
ispanstream (C++23)
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std::basic_ispanstream<char> (typedef) |
wispanstream (C++23)
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std::basic_ispanstream<wchar_t> (typedef) |
ospanstream (C++23)
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std::basic_ospanstream<char> (typedef) |
wospanstream (C++23)
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std::basic_ospanstream<wchar_t> (typedef) |
spanstream (C++23)
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std::basic_spanstream<char> (typedef) |
wspanstream (C++23)
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std::basic_spanstream<wchar_t> (typedef) |
函数 | |
特化 std::swap 算法 (函数模板) | |
特化 std::swap 算法 (函数模板) | |
特化 std::swap 算法 (函数模板) | |
特化 std::swap 算法 (函数模板) |
概要
namespace std { template<class CharT, class Traits = char_traits<CharT>> class basic_spanbuf; using spanbuf = basic_spanbuf<char>; using wspanbuf = basic_spanbuf<wchar_t>; template<class CharT, class Traits = char_traits<CharT>> class basic_ispanstream; using ispanstream = basic_ispanstream<char>; using wispanstream = basic_ispanstream<wchar_t>; template<class CharT, class Traits = char_traits<CharT>> class basic_ospanstream; using ospanstream = basic_ospanstream<char>; using wospanstream = basic_ospanstream<wchar_t>; template<class CharT, class Traits = char_traits<CharT>> class basic_spanstream; using spanstream = basic_spanstream<char>; using wspanstream = basic_spanstream<wchar_t>; }
类模板 std::basic_spanbuf
namespace std { template<class CharT, class Traits = char_traits<CharT>> class basic_spanbuf : public basic_streambuf<CharT, Traits> { public: using char_type = CharT; using int_type = typename Traits::int_type; using pos_type = typename Traits::pos_type; using off_type = typename Traits::off_type; using traits_type = Traits; // 构造函数 basic_spanbuf() : basic_spanbuf(ios_base::in | ios_base::out) {} explicit basic_spanbuf(ios_base::openmode which) : basic_spanbuf(std::span<CharT>(), which) {} explicit basic_spanbuf( std::span<CharT> s, ios_base::openmode which = ios_base::in | ios_base::out); basic_spanbuf(const basic_spanbuf&) = delete; basic_spanbuf(basic_spanbuf&& rhs); // 赋值与交换 basic_spanbuf& operator=(const basic_spanbuf&) = delete; basic_spanbuf& operator=(basic_spanbuf&& rhs); void swap(basic_spanbuf& rhs); // 获取与设置 std::span<CharT> span() const noexcept; void span(std::span<CharT> s) noexcept; protected: // 重写的虚函数 basic_streambuf<CharT, Traits>* setbuf(CharT*, streamsize) override; pos_type seekoff(off_type off, ios_base::seekdir way, ios_base::openmode which = ios_base::in | ios_base::out) override; pos_type seekpos(pos_type sp, ios_base::openmode which = ios_base::in | ios_base::out) override; private: ios_base::openmode mode; // 仅用于阐释 std::span<CharT> buf; // 仅用于阐释 }; template<class CharT, class Traits> void swap(basic_spanbuf<CharT, Traits>& x, basic_spanbuf<CharT, Traits>& y); }
类模板 std::basic_ispanstream
namespace std { template<class CharT, class Traits = char_traits<CharT>> class basic_ispanstream : public basic_istream<CharT, Traits> { public: using char_type = CharT; using int_type = typename Traits::int_type; using pos_type = typename Traits::pos_type; using off_type = typename Traits::off_type; using traits_type = Traits; // 构造函数 explicit basic_ispanstream( std::span<CharT> s, ios_base::openmode which = ios_base::in); basic_ispanstream(const basic_ispanstream&) = delete; basic_ispanstream(basic_ispanstream&& rhs); template<class ROS> explicit basic_ispanstream(ROS&& s); // 赋值与交换 basic_ispanstream& operator=(const basic_ispanstream&) = delete; basic_ispanstream& operator=(basic_ispanstream&& rhs); void swap(basic_ispanstream& rhs); // 成员 basic_spanbuf<CharT, Traits>* rdbuf() const noexcept; std::span<const CharT> span() const noexcept; void span(std::span<CharT> s) noexcept; template<class ROS> void span(ROS&& s) noexcept; private: basic_spanbuf<CharT, Traits> sb; // 仅用于阐释 }; template<class CharT, class Traits> void swap(basic_ispanstream<CharT, Traits>& x, basic_ispanstream<CharT, Traits>& y); }
类模板 std::basic_ospanstream
namespace std { template<class CharT, class Traits = char_traits<CharT>> class basic_ospanstream : public basic_ostream<CharT, Traits> { public: using char_type = CharT; using int_type = typename Traits::int_type; using pos_type = typename Traits::pos_type; using off_type = typename Traits::off_type; using traits_type = Traits; // 构造函数 explicit basic_ospanstream( std::span<CharT> s, ios_base::openmode which = ios_base::out); basic_ospanstream(const basic_ospanstream&) = delete; basic_ospanstream(basic_ospanstream&& rhs); // 赋值与交换 basic_ospanstream& operator=(const basic_ospanstream&) = delete; basic_ospanstream& operator=(basic_ospanstream&& rhs); void swap(basic_ospanstream& rhs); // 成员 basic_spanbuf<CharT, Traits>* rdbuf() const noexcept; std::span<CharT> span() const noexcept; void span(std::span<CharT> s) noexcept; private: basic_spanbuf<CharT, Traits> sb; // 仅用于阐释 }; template<class CharT, class Traits> void swap(basic_ospanstream<CharT, Traits>& x, basic_ospanstream<CharT, Traits>& y); }
类模板 std::basic_spanstream
namespace std { template<class CharT, class Traits = char_traits<CharT>> class basic_spanstream : public basic_iostream<CharT, Traits> { public: using char_type = charT; using int_type = typename Traits::int_type; using pos_type = typename Traits::pos_type; using off_type = typename Traits::off_type; using traits_type = Traits; // 构造函数 explicit basic_spanstream( std::span<CharT> s, ios_base::openmode which = ios_base::out | ios_base::in); basic_spanstream(const basic_spanstream&) = delete; basic_spanstream(basic_spanstream&& rhs); // 赋值与交换 basic_spanstream& operator=(const basic_spanstream&) = delete; basic_spanstream& operator=(basic_spanstream&& rhs); void swap(basic_spanstream& rhs); // 成员 basic_spanbuf<CharT, Traits>* rdbuf() const noexcept; std::span<CharT> span() const noexcept; void span(std::span<CharT> s) noexcept; private: basic_spanbuf<CharT, Traits> sb; // 仅用于阐释 }; template<class CharT, class Traits> void swap(basic_spanstream<CharT, Traits>& x, basic_spanstream<CharT, Traits>& y); }