标准库头文件 <syncstream>
来自cppreference.com
此头文件是输入/输出库的一部分。
包含 | |
| (C++20) |
std::basic_ostream 、 std::basic_iostream 类模板与数个 typedef |
类 | |
| (C++20) |
同步输出设备的包装 (类模板) |
| (C++20) |
同步输出流的包装 (类模板) |
syncbuf(C++20)
|
std::basic_syncbuf<char> (typedef) |
wsyncbuf(C++20)
|
std::basic_syncbuf<wchar_t> (typedef) |
osyncstream(C++20)
|
std::basic_osyncstream<char> (typedef) |
wosyncstream(C++20)
|
std::basic_osyncstream<wchar_t> (typedef) |
函数 | |
| 特化 std::swap 算法 (函数模板) | |
概要
#include <ostream> namespace std { template<class CharT, class Traits = char_traits<CharT>, class Allocator = allocator<CharT>> class basic_syncbuf; using syncbuf = basic_syncbuf<char>; using wsyncbuf = basic_syncbuf<wchar_t>; template<class CharT, class Traits = char_traits<CharT>, class Allocator = allocator<CharT>> class basic_osyncstream; using osyncstream = basic_osyncstream<char>; using wosyncstream = basic_osyncstream<wchar_t>; }
类模板 std::basic_syncbuf
namespace std { template<class CharT, class Traits = char_traits<CharT>, class Allocator = allocator<CharT>> class basic_syncbuf : 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; using allocator_type = Allocator; using streambuf_type = basic_streambuf<CharT, Traits>; // 构造与析构 basic_syncbuf() : basic_syncbuf(nullptr) {} explicit basic_syncbuf(streambuf_type* obuf) : basic_syncbuf(obuf, Allocator()) {} basic_syncbuf(streambuf_type*, const Allocator&); basic_syncbuf(basic_syncbuf&&); ~basic_syncbuf(); // 赋值与交换 basic_syncbuf& operator=(basic_syncbuf&&); void swap(basic_syncbuf&); // 成员函数 bool emit(); streambuf_type* get_wrapped() const noexcept; allocator_type get_allocator() const noexcept; void set_emit_on_sync(bool) noexcept; protected: // 覆盖的虚函数 int sync() override; private: streambuf_type* wrapped; // 仅用于阐释 bool emit_on_sync{}; // 仅用于阐释 }; // 特化的算法 template<class CharT, class Traits, class Allocator> void swap(basic_syncbuf<CharT, Traits, Allocator>&, basic_syncbuf<CharT, Traits, Allocator>&); }
类模板 std::basic_osyncstream
namespace std { template<class CharT, class Traits = char_traits<CharT>, class Allocator = allocator<CharT>> class basic_syncbuf : 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; using allocator_type = Allocator; using streambuf_type = basic_streambuf<CharT, Traits>; // 构造与析构 basic_syncbuf() : basic_syncbuf(nullptr) {} explicit basic_syncbuf(streambuf_type* obuf) : basic_syncbuf(obuf, Allocator()) {} basic_syncbuf(streambuf_type*, const Allocator&); basic_syncbuf(basic_syncbuf&&); ~basic_syncbuf(); // 赋值与交换 basic_syncbuf& operator=(basic_syncbuf&&); void swap(basic_syncbuf&); // 成员函数 bool emit(); streambuf_type* get_wrapped() const noexcept; allocator_type get_allocator() const noexcept; void set_emit_on_sync(bool) noexcept; protected: // 覆盖的虚函数 int sync() override; private: streambuf_type* wrapped; // 仅用于阐释 bool emit_on_sync{}; // 仅用于阐释 }; // 特化的算法 template<class CharT, class Traits, class Allocator> void swap(basic_syncbuf<CharT, Traits, Allocator>&, basic_syncbuf<CharT, Traits, Allocator>&); }
