std::basic_ostream::basic_ostream

(1) inititalization constructor

Assigns initial values to the components of its base classes by calling the inherited member basic_ios::init with sb as argument.

(2) copy constructor (deleted)

Deleted: no copy constructor.

(3) move constructor (protected)

Acquires the contents of x, except its associated stream buffer: It calls basic_ios::move to transfer x's internal components inherited from basic_ios. x is left with its associated stream buffer unchanged and not tied (all other components of x are in an unspecified but valid state after the call).

Parameters

sb

pointer to a basic_streambuf object with the same template parameters as the basic_ostream object.
char_type and traits_type are member types defined as aliases of the first and second class template parameters, respectively (see basic_ostream types).

x

Another basic_ostream of the same type (with the same class template arguments charT and traits).

Example

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// ostream constructor
#include <iostream>     // std::cout, std::ostream, std::ios
#include <fstream>      // std::filebuf

int main () {
  std::filebuf fb;
  fb.open ("test.txt",std::ios::out);
  std::ostream os(&fb);
  os << "Test sentence\n";
  fb.close();
  return 0;
}

Data races

Exception safety

See also

basic_ios::init

Initialize object (protected member function)