标准库头文件 <sstream>

 

C++

语言

标准库头文件

自立与有宿主实现

具名要求

语言支持库

概念库 (C++20)

诊断库

工具库

字符串库

容器库

迭代器库

范围库 (C++20)

算法库

数值库

输入/输出库

本地化库

正则表达式库 (C++11)

原子操作库 (C++11)

线程支持库 (C++11)

文件系统库 (C++17)

技术规范

 

标准库头文件

语言支持
<cstddef> <limits> <climits> <coroutine>	<cfloat> <cstdint> <new> <source_location>	<typeinfo> <exception> <initializer_list> <version>	<csignal> <csetjmp> <cstdarg>
概念
<concepts>
诊断
<stdexcept>	<cassert>	<cerrno>	<system_error>
通用工具
<utility> <memory> <memory_resource> <scoped_allocator>     <compare>	<bitset> <tuple> <optional> <any> <variant>	<type_traits> <ratio> <chrono> <typeindex> <functional>	<ctime> <cstdlib>
字符串
<string> <string_view> <cstring>	<charconv> <format>	<cctype> <cwctype>	<cwchar> <cuchar>
本地化
<locale>	<codecvt>	<clocale>
容器
<span> <array> <vector>	<deque> <forward_list> <list>	<map> <set> <queue>	<unordered_map> <unordered_set> <stack>
迭代器
<iterator>
范围
<ranges>
算法
<algorithm>	<execution>
数值
<complex> <random>	<valarray> <numeric>	<bit> <numbers>	<cfenv> <cmath>
输入/输出
<iosfwd> <ios> <iomanip> <streambuf>	<istream> <ostream> <iostream>	<sstream> <fstream> <syncstream>	<cstdio> <cinttypes> <strstream>
正则表达式
<regex>
文件系统
<filesystem>
线程支持
<thread> <atomic> <mutex>	<shared_mutex> <condition_variable> <future>	<stop_token> <semaphore>	<latch> <barrier>
C 兼容
<ciso646> <cstdalign>	<cstdbool> <ccomplex>	<ctgmath>

 

此头文件是输入/输出库的一部分。

类
basic_stringbuf	实现原生字符串设备 (类模板)
basic_istringstream	实现高层字符串流输入操作 (类模板)
basic_ostringstream	实现高层字符串流输出操作 (类模板)
basic_stringstream	实现高层字符串流输入/输出操作 (类模板)
typedef
stringbuf	basic_stringbuf<char>
wstringbuf	basic_stringbuf<wchar_t>
istringstream	basic_istringstream<char>
wistringstream	basic_istringstream<wchar_t>
ostringstream	basic_ostringstream<char>
wostringstream	basic_ostringstream<wchar_t>
stringstream	basic_stringstream<char>
wstringstream	basic_stringstream<wchar_t>
函数
std::swap(std::basic_stringbuf) (C++11)	特化 std::swap 算法 (函数模板)
std::swap(std::basic_istringstream) (C++11)	特化 std::swap 算法 (函数模板)
std::swap(std::basic_istringstream) (C++11)	特化 std::swap 算法 (函数模板)
std::swap(std::basic_istringstream) (C++11)	特化 std::swap 算法 (函数模板)

概要

namespace std {
 
    template <class charT,
              class traits = char_traits<charT>,
              class Allocator = allocator<charT> >
        class basic_stringbuf;
    typedef basic_stringbuf<char> stringbuf;
    typedef basic_stringbuf<wchar_t> wstringbuf;
    template <class charT, class traits, class Allocator>
        void swap(basic_stringbuf<charT, traits, Allocator>& x,
                  basic_stringbuf<charT, traits, Allocator>& y);
 
    template <class charT,
              class traits = char_traits<charT>,
              class Allocator = allocator<charT> >
        class basic_istringstream;
    typedef basic_istringstream<char> istringstream;
    typedef basic_istringstream<wchar_t> wistringstream;
    template <class charT, class traits, class Allocator>
        void swap(basic_istringstream<charT, traits, Allocator>& x,
                  basic_istringstream<charT, traits, Allocator>& y);
 
    template <class charT,
              class traits = char_traits<charT>,
              class Allocator = allocator<charT> >
        class basic_ostringstream;
    typedef basic_ostringstream<char> ostringstream;
    typedef basic_ostringstream<wchar_t> wostringstream;
    template <class charT, class traits, class Allocator>
        void swap(basic_ostringstream<charT, traits, Allocator>& x,
                  basic_ostringstream<charT, traits, Allocator>& y);
 
    template <class charT,
              class traits = char_traits<charT>,
              class Allocator = allocator<charT> >
        class basic_stringstream;
    typedef basic_stringstream<char> stringstream;
    typedef basic_stringstream<wchar_t> wstringstream;
    template <class charT, class traits, class Allocator>
        void swap(basic_stringstream<charT, traits, Allocator>& x,
                  basic_stringstream<charT, traits, Allocator>& y);
}

类 std::basic_stringbuf

template <class charT,
          class traits = char_traits<charT>,
          class Allocator = allocator<charT> >
class basic_stringbuf : public basic_streambuf<charT,traits> {
 public:
    typedef charT char_type;
    typedef typename traits::int_type int_type;
    typedef typename traits::pos_type pos_type;
    typedef typename traits::off_type off_type;
    typedef traits traits_type;
    typedef Allocator allocator_type;
 
    // 构造函数：
    explicit basic_stringbuf(ios_base::openmode which = ios_base::in|ios_base::out);
    explicit basic_stringbuf(const basic_string<charT,traits,Allocator>& str,
                             ios_base::openmode which = ios_base::in|ios_base::out);
    basic_stringbuf(const basic_stringbuf& rhs) = delete;
    basic_stringbuf(basic_stringbuf&& rhs);
 
    // 赋值与交换：
    basic_stringbuf& operator=(const basic_stringbuf& rhs) = delete;
    basic_stringbuf& operator=(basic_stringbuf&& rhs);
    void swap(basic_stringbuf& rhs);
 
    // 获取与设置：
    basic_string<charT,traits,Allocator> str() const;
    void str(const basic_string<charT,traits,Allocator>& s);
 
 protected:
    // 覆盖的虚函数：
    virtual int_type underflow();
    virtual int_type pbackfail(int_type c = traits::eof());
    virtual int_type overflow (int_type c = traits::eof());
    virtual basic_streambuf<charT,traits>* setbuf(charT*, streamsize);
    virtual pos_type seekoff(off_type off, ios_base::seekdir way,
                             ios_base::openmode which = ios_base::in|ios_base::out);
    virtual pos_type seekpos(pos_type sp,
                             ios_base::openmode which = ios_base::in|ios_base::out);
 
 private:
    ios_base::openmode mode; // 仅用于阐释
};

类 std::basic_istringstream

template <class charT,
          class traits = char_traits<charT>,
          class Allocator = allocator<charT> >
class basic_istringstream : public basic_istream<charT,traits> {
 public:
    typedef charT char_type;
    typedef typename traits::int_type int_type;
    typedef typename traits::pos_type pos_type;
    typedef typename traits::off_type off_type;
    typedef traits traits_type;
    typedef Allocator allocator_type;
 
    // 构造函数：
    explicit basic_istringstream(ios_base::openmode which = ios_base::in);
    explicit basic_istringstream(const basic_string<charT,traits,Allocator>& str,
                                 ios_base::openmode which = ios_base::in);
    basic_istringstream(const basic_istringstream& rhs) = delete;
    basic_istringstream(basic_istringstream&& rhs);
 
    // 赋值与交换：
    basic_istringstream& operator=(const basic_istringstream& rhs) = delete;
    basic_istringstream& operator=(basic_istringstream&& rhs);
    void swap(basic_istringstream& rhs);
 
    // 成员：
    basic_stringbuf<charT,traits,Allocator>* rdbuf() const;
    basic_string<charT,traits,Allocator> str() const;
    void str(const basic_string<charT,traits,Allocator>& s);
 
 private:
    basic_stringbuf<charT,traits,Allocator> sb; // 仅用于阐释
};

类 std::basic_ostringstream

template <class charT,
          class traits = char_traits<charT>,
          class Allocator = allocator<charT> >
class basic_ostringstream : public basic_ostream<charT,traits> {
 public:
    // 类型：
    typedef charT char_type;
    typedef typename traits::int_type int_type;
    typedef typename traits::pos_type pos_type;
    typedef typename traits::off_type off_type;
    typedef traits traits_type;
    typedef Allocator allocator_type;
 
    // 构造函数/析构函数：
    explicit basic_ostringstream(ios_base::openmode which = ios_base::out);
    explicit basic_ostringstream(const basic_string<charT,traits,Allocator>& str,
                                 ios_base::openmode which = ios_base::out);
     basic_ostringstream(const basic_ostringstream& rhs) = delete;
     basic_ostringstream(basic_ostringstream&& rhs);
 
    // 赋值/交换：
    basic_ostringstream& operator=(const basic_ostringstream& rhs) = delete;
    basic_ostringstream& operator=(basic_ostringstream&& rhs);
    void swap(basic_ostringstream& rhs);
 
    // 成员：
    basic_stringbuf<charT,traits,Allocator>* rdbuf() const;
    basic_string<charT,traits,Allocator> str() const;
    void str(const basic_string<charT,traits,Allocator>& s);
 
 private:
    basic_stringbuf<charT,traits,Allocator> sb; // 仅用于阐释
};

类 std::basic_stringstream

template <class charT,
          class traits = char_traits<charT>,
          class Allocator = allocator<charT> >
class basic_stringstream : public basic_iostream<charT,traits> {
 public:
    // 类型：
    typedef charT char_type;
    typedef typename traits::int_type int_type;
    typedef typename traits::pos_type pos_type;
    typedef typename traits::off_type off_type;
    typedef traits traits_type;
    typedef Allocator allocator_type;
 
    // 构造函数/析构函数
    explicit basic_stringstream(ios_base::openmode which = ios_base::out|ios_base::in);
    explicit basic_stringstream(const basic_string<charT,traits,Allocator>& str,
                                ios_base::openmode which = ios_base::out|ios_base::in);
    basic_stringstream(const basic_stringstream& rhs) = delete;
    basic_stringstream(basic_stringstream&& rhs);
 
    // 赋值/交换：
    basic_stringstream& operator=(const basic_stringstream& rhs) = delete;
    basic_stringstream& operator=(basic_stringstream&& rhs);
    void swap(basic_stringstream& rhs);
 
    // 成员：
    basic_stringbuf<charT,traits,Allocator>* rdbuf() const;
    basic_string<charT,traits,Allocator> str() const;
    void str(const basic_string<charT,traits,Allocator>& str);
 
 private:
    basic_stringbuf<charT, traits> sb; // 仅用于阐释
};