text: //===----------------------------------------------------------------------===//
  //
  //                     The LLVM Compiler Infrastructure
  //
  // This file is dual licensed under the MIT and the University of Illinois Open
  // Source Licenses. See LICENSE.TXT for details.
  //
  //===----------------------------------------------------------------------===//
  
  // <sstream>
  
  // template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
  // class basic_ostringstream
  
  // void swap(basic_ostringstream& rhs);
  
  #include <sstream>
  #include <cassert>
  
  int main()
  {
      {
          std::ostringstream ss0(" 123 456");
          std::ostringstream ss;
          ss.swap(ss0);
          assert(ss.rdbuf() != 0);
          assert(ss.good());
          assert(ss.str() == " 123 456");
          int i = 234;
          ss << i << ' ' << 567;
          assert(ss.str() == "234 5676");
          ss0 << i << ' ' << 567;
          assert(ss0.str() == "234 567");
      }
      {
          std::wostringstream ss0(L" 123 456");
          std::wostringstream ss;
          ss.swap(ss0);
          assert(ss.rdbuf() != 0);
          assert(ss.good());
          assert(ss.str() == L" 123 456");
          int i = 234;
          ss << i << ' ' << 567;
          assert(ss.str() == L"234 5676");
          ss0 << i << ' ' << 567;
          assert(ss0.str() == L"234 567");
      }
  }
  