std::basic_osyncstream::get_wrapped

 

C++

Language

Standard Library Headers

Freestanding and hosted implementations

Named requirements

Language support library

Concepts library (C++20)

Diagnostics library

Utilities library

Strings library

Containers library

Iterators library

Ranges library (C++20)

Algorithms library

Numerics library

Input/output library

Localizations library

Regular expressions library (C++11)

Atomic operations library (C++11)

Thread support library (C++11)

Filesystem library (C++17)

Technical Specifications

 

Input/output library

I/O manipulators

C-style I/O

Buffers

basic_streambuf

basic_filebuf

basic_stringbuf

strstreambuf (deprecated in C++98)

basic_syncbuf (C++20)

Streams

Abstractions

ios_base

basic_ios

basic_istream

basic_ostream

basic_iostream

File I/O

basic_ifstream

basic_ofstream

basic_fstream

String I/O

basic_istringstream

basic_ostringstream

basic_stringstream

Array I/O

istrstream (deprecated in C++98)

ostrstream (deprecated in C++98)

strstream (deprecated in C++98)

Synchronized Output

basic_osyncstream (C++20)

Types

streamoff

streamsize

fpos

Error category interface

iostream_category (C++11)

io_errc (C++11)

 

std::basic_osyncstream

Public member functions

basic_osyncstream::basic_osyncstream

basic_osyncstream::operator=

basic_osyncstream::~basic_osyncstream

basic_osyncstream::rdbuf

basic_osyncstream::get_wrapped

basic_osyncstream::emit

 

streambuf_type* get_wrapped() const noexcept;

Returns a pointer to the wrapped std::basic_streambuf, obtained by calling get_wrapped() on the underlying std::basic_syncbuf.

Parameters

(none)

Example

wrapped buffer can be safely wrapped again in a different synchronized output stream

Run this code

#include <syncstream>
#include <iostream>
int main()
{
  std::osyncstream bout1(std::cout);
  bout1 << "Hello, ";
  {
    std::osyncstream(bout1.get_wrapped()) << "Goodbye, " << "Planet!" << ’\n’;
  } // emits the contents of the temporary buffer
  bout1 << "World!" << ’\n’;
} // emits the contents of bout1

Output:

Goodbye, Planet!
Hello, World!

See also

(destructor)	destroys the basic_osyncstream and emits its internal buffer (public member function)
get_wrapped	retrieves the wrapped streambuf pointer (public member function of std::basic_syncbuf)