std::basic_stringbuf::str

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C++
 
输入/输出库
I / O操纵
C-风格的I / O
缓冲区
Original:
Buffers
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basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf（过时了）
流
Original:
Streams
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抽象
Original:
Abstractions
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ios_base
basic_ios
basic_istream
basic_ostream
basic_iostream
文件I / O
Original:
File I/O
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basic_ifstream
basic_ofstream
basic_fstream
字符串I / O
Original:
String I/O
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basic_istringstream
basic_ostringstream
basic_stringstream
阵列的I / O
Original:
Array I/O
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istrstream（过时了）
ostrstream（过时了）
strstream（过时了）
类型
Original:
Types
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streamoff
streamsize
fpos
Error类的接口
Original:
Error category interface
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iostream_category（C++11）
io_errc（C++11）
 
std::basic_stringbuf
公共成员函数
Original:
Public member functions
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basic_stringbuf::basic_stringbuf
basic_stringbuf::operator=（C++11）
basic_stringbuf::swap（C++11）
basic_stringbuf::str
受保护的成员函数
Original:
Protected member functions
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basic_stringbuf::underflow
basic_stringbuf::pbackfail
basic_stringbuf::overflow
basic_stringbuf::setbuf
basic_stringbuf::seekoff
basic_stringbuf::seekpos
非成员函数
Original:
Non-member functions
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swap(std::basic_stringbuf)（C++11）
 
std::basic_string<CharT, Traits, Allocator> str() const;
 (1)
void str( const std::basic_string<CharT, Traits, Allocator>& s);
 (2)
获取和设置相关的字符串.
Original:
Gets and sets the underlying string.
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1)
创建并返回一个std::basic_stringstd::basic_stringbuf的基本字符序列的拷贝对象，其中包含。对于输入流，返回的字符串包含的字符的范围[eback(), egptr())。输入/输出或输出流，从pbase()包含的字符序列中的最后一个字符，无论egptr()，epptr().
Original:
Creates and returns a std::basic_string object containing a copy of this std::basic_stringbuf's underlying character sequence. For input-only streams, the returned string contains the characters from the range [eback(), egptr()). For input/output or output-only streams, contains the characters from pbase() to the last character in the sequence regardless of egptr() and epptr().
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2)
本std::basic_stringbuf删除整个基础字符序列，然后配置一个新的底层字符序列s的内容的副本。指针std::basic_streambuf中初始化如下：
Original:
Deletes the entire underlying character sequence of this std::basic_stringbuf and then configures a new underlying character sequence containing a copy of the contents of s. The pointers of std::basic_streambuf are initialized as follows:
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输入流（mode & ios_base::in == true），eback()点的第一个字符，gptr() == eback()，并egptr() == eback() + s.size()：随后的输入将读取的第一个字符复制到s.
Original:
For input streams (mode & ios_base::in == true), eback() points at the first character, gptr() == eback(), and egptr() == eback() + s.size(): the subsequent input will read the first character copied from s.
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对于输出流（mode & ios_base::out == true），pbase()点的第一个字符和epptr() >= pbase() + s.size()（epptr点更远，以下sputc()不会立即拨打overflow()）
Original:
For output streams (mode & ios_base::out == true), pbase() points at the first character and epptr() >= pbase() + s.size() (epptr is allowed to point farther so that the following sputc() wouldn't immediately call overflow())
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对于追加数据流（mode & ios_base::ate == true），pptr() == pbase() + s.size()，以便将后续输出将被追加到最后一个字符复制s（C++11 起）
Original:
For append streams (mode & ios_base::ate == true), pptr() == pbase() + s.size(), so that subsequent output will be appended to the last character copied from s （C++11 起）
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对于无附加输出流，pptr() == pbase()，以便将后续输出将覆盖从s的字符复制.
Original:
For no-appending output streams, pptr() == pbase(), so that subsequent output will overwrite the characters copied from s.
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目录

[编辑] 参数

s -
一个字符串对象替换的字符序列
Original:
a string object holding the replacement character sequence
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[编辑] 返回值

1)
此缓冲区的底层字符序列的字符串对象的一个​​副本.
Original:
A string object holding a copy of this buffer's underlying character sequence.
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2)
（无）
Original:
(none)
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[编辑] 注释

该功能通常可以通过std::basic_stringstream::str().
Original:
This function is typically accessed through std::basic_stringstream::str().
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[编辑] 为例

#include <sstream>
#include <iostream>
int main()
{
    int n;
 
    std::istringstream in;  // could also use in("1 2")
    in.rdbuf()->str("1 2"); // set the get area
    in >> n;
    std::cout << "after reading the first int from \"1 2\", the int is " 
              << n << ", str() = \"" << in.rdbuf()->str() << "\"\n"; // or in.str()
 
    std::ostringstream out("1 2");
    out << 3;
    std::cout << "after writing the int '3' to output stream \"1 2\""
              << ", str() = \"" << out.str() << "\"\n";
 
    std::ostringstream ate("1 2", std::ios_base::ate); // C++11
    ate << 3;
    std::cout << "after writing the int '3' to append stream \"1 2\""
              << ", str() = \"" << ate.str() << "\"\n";
}

Output: 

after reading the first int from "1 2", the int is 1, str() = "1 2"
after writing the int '3' to output stream "1 2", str() = "3 2"
after writing the int '3' to append stream "1 2", str() = "1 23"

[编辑] 另请参阅
获取或设置字符串设备对象相关的内容
Original:
gets or sets the contents of underlying string device object
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（公共成员函数of std::basic_stringstream） [edit]
来自“http://zh.cppreference.com/mwiki/index.php?title=cpp/io/basic_stringbuf/str&oldid=28104”