标准库头文件 <fstream>
来自cppreference.com
此头文件是输入/输出库的一部分。
类 | |
抽象原生文件设备 (类模板) | |
实现高层文件流输入操作 (类模板) | |
实现高层文件流输出操作 (类模板) | |
实现高层文件流输入/输出操作 (类模板) | |
filebuf
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std::basic_filebuf<char> (typedef) |
wfilebuf
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std::basic_filebuf<wchar_t> (typedef) |
ifstream
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std::basic_ifstream<char> (typedef) |
wifstream
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std::basic_ifstream<wchar_t> (typedef) |
ofstream
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std::basic_ofstream<char> (typedef) |
wofstream
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std::basic_ofstream<wchar_t> (typedef) |
fstream
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std::basic_fstream<char> (typedef) |
wfstream
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std::basic_fstream<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_filebuf; using filebuf = basic_filebuf<char>; using wfilebuf = basic_filebuf<wchar_t>; template<class charT, class traits = char_traits<charT>> class basic_ifstream; using ifstream = basic_ifstream<char>; using wifstream = basic_ifstream<wchar_t>; template<class charT, class traits = char_traits<charT>> class basic_ofstream; using ofstream = basic_ofstream<char>; using wofstream = basic_ofstream<wchar_t>; template<class charT, class traits = char_traits<charT>> class basic_fstream; using fstream = basic_fstream<char>; using wfstream = basic_fstream<wchar_t>; }
类模板 std::basic_filebuf
namespace std { template<class CharT, class Traits = char_traits<CharT>> class basic_filebuf : 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/析构函数 basic_filebuf(); basic_filebuf(const basic_filebuf&) = delete; basic_filebuf(basic_filebuf&& rhs); virtual ~basic_filebuf(); // 赋值与交换 basic_filebuf& operator=(const basic_filebuf&) = delete; basic_filebuf& operator=(basic_filebuf&& rhs); void swap(basic_filebuf& rhs); // 成员 bool is_open() const; basic_filebuf* open(const char* s, ios_base::openmode mode); basic_filebuf* open(const filesystem::path::value_type* s, ios_base::openmode mode); // 仅宽系统 basic_filebuf* open(const string& s, ios_base::openmode mode); basic_filebuf* open(const filesystem::path& s, ios_base::openmode mode); basic_filebuf* close(); protected: // 覆盖的虚函数 streamsize showmanyc() override; int_type underflow() override; int_type uflow() override; int_type pbackfail(int_type c = Traits::eof()) override; int_type overflow (int_type c = Traits::eof()) override; basic_streambuf<CharT, Traits>* setbuf(char_type* s, streamsize n) 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; int sync() override; void imbue(const locale& loc) override; }; template<class CharT, class Traits> void swap(basic_filebuf<CharT, Traits>& x, basic_filebuf<CharT, Traits>& y); }
类模板 std::basic_ifstream
namespace std { template<class CharT, class Traits = char_traits<CharT>> class basic_ifstream : 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 basic_ifstream(); explicit basic_ifstream(const char* s, ios_base::openmode mode = ios_base::in); explicit basic_ifstream(const filesystem::path::value_type* s, ios_base::openmode mode = ios_base::in);// 仅宽系统 explicit basic_ifstream(const string& s, ios_base::openmode mode = ios_base::in); explicit basic_ifstream(const filesystem::path& s, ios_base::openmode mode = ios_base::in); basic_ifstream(const basic_ifstream&) = delete; basic_ifstream(basic_ifstream&& rhs); // 赋值与交换 basic_ifstream& operator=(const basic_ifstream&) = delete; basic_ifstream& operator=(basic_ifstream&& rhs); void swap(basic_ifstream& rhs); // 成员 basic_filebuf<CharT, Traits>* rdbuf() const; bool is_open() const; void open(const char* s, ios_base::openmode mode = ios_base::in); void open(const filesystem::path::value_type* s, ios_base::openmode mode = ios_base::in); // 仅宽系统 void open(const string& s, ios_base::openmode mode = ios_base::in); void open(const filesystem::path& s, ios_base::openmode mode = ios_base::in); void close(); private: basic_filebuf<CharT, Traits> sb; // 仅用于阐释 }; template<class CharT, class Traits> void swap(basic_ifstream<CharT, Traits>& x, basic_ifstream<CharT, Traits>& y); }
类模板 std::basic_ofstream
namespace std { template<class CharT, class Traits = char_traits<CharT>> class basic_ofstream : 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 basic_ofstream(); explicit basic_ofstream(const char* s, ios_base::openmode mode = ios_base::out); explicit basic_ofstream(const filesystem::path::value_type* s, // 仅宽系统 ios_base::openmode mode = ios_base::out); explicit basic_ofstream(const string& s, ios_base::openmode mode = ios_base::out); explicit basic_ofstream(const filesystem::path& s, ios_base::openmode mode = ios_base::out); basic_ofstream(const basic_ofstream&) = delete; basic_ofstream(basic_ofstream&& rhs); // 赋值与交换 basic_ofstream& operator=(const basic_ofstream&) = delete; basic_ofstream& operator=(basic_ofstream&& rhs); void swap(basic_ofstream& rhs); // 成员 basic_filebuf<CharT, Traits>* rdbuf() const; bool is_open() const; void open(const char* s, ios_base::openmode mode = ios_base::out); void open(const filesystem::path::value_type* s, ios_base::openmode mode = ios_base::out); // 仅宽系统 void open(const string& s, ios_base::openmode mode = ios_base::out); void open(const filesystem::path& s, ios_base::openmode mode = ios_base::out); void close(); private: basic_filebuf<CharT, Traits> sb; // 仅用于阐释 }; template<class CharT, class Traits> void swap(basic_ofstream<CharT, Traits>& x, basic_ofstream<CharT, Traits>& y); }
类模板 std::basic_fstream
namespace std { template<class CharT, class Traits = char_traits<CharT>> class basic_fstream : 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 basic_fstream(); explicit basic_fstream( const char* s, ios_base::openmode mode = ios_base::in | ios_base::out); explicit basic_fstream( const filesystem::path::value_type* s, ios_base::openmode mode = ios_base::in | ios_base::out); // 仅宽系统 explicit basic_fstream( const string& s, ios_base::openmode mode = ios_base::in | ios_base::out); explicit basic_fstream( const filesystem::path& s, ios_base::openmode mode = ios_base::in | ios_base::out); basic_fstream(const basic_fstream&) = delete; basic_fstream(basic_fstream&& rhs); // 赋值与交换 basic_fstream& operator=(const basic_fstream&) = delete; basic_fstream& operator=(basic_fstream&& rhs); void swap(basic_fstream& rhs); // 成员 basic_filebuf<CharT, Traits>* rdbuf() const; bool is_open() const; void open( const char* s, ios_base::openmode mode = ios_base::in | ios_base::out); void open( const filesystem::path::value_type* s, ios_base::openmode mode = ios_base::in | ios_base::out); // 仅宽系统 void open( const string& s, ios_base::openmode mode = ios_base::in | ios_base::out); void open( const filesystem::path& s, ios_base::openmode mode = ios_base::in | ios_base::out); void close(); private: basic_filebuf<CharT, Traits> sb; // 仅宽系统 }; template<class CharT, class Traits> void swap(basic_fstream<CharT, Traits>& x, basic_fstream<CharT, Traits>& y); }