text: //===----------------------------------------------------------------------===//
  //
  // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  // See https://llvm.org/LICENSE.txt for license information.
  // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  //
  //===----------------------------------------------------------------------===//
  
  // <sstream>
  
  // template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
  // class basic_istringstream
  
  // template <class charT, class traits, class Allocator>
  //   void
  //   swap(basic_istringstream<charT, traits, Allocator>& x,
  //        basic_istringstream<charT, traits, Allocator>& y);
  
  #include <sstream.hxx>
  #include <cassert.hxx>
  
  #include "test_macros.h"
  
  int main(int, char**)
  {
      {
          std::istringstream ss0(" 123 456");
          std::istringstream ss(" 789 321");
          swap(ss, ss0);
          assert(ss.rdbuf() != 0);
          assert(ss.good());
          assert(ss.str() == " 123 456");
          int i = 0;
          ss >> i;
          assert(i == 123);
          ss >> i;
          assert(i == 456);
          ss0 >> i;
          assert(i == 789);
          ss0 >> i;
          assert(i == 321);
      }
      {
          std::wistringstream ss0(L" 123 456");
          std::wistringstream ss(L" 789 321");
          swap(ss, ss0);
          assert(ss.rdbuf() != 0);
          assert(ss.good());
          assert(ss.str() == L" 123 456");
          int i = 0;
          ss >> i;
          assert(i == 123);
          ss >> i;
          assert(i == 456);
          ss0 >> i;
          assert(i == 789);
          ss0 >> i;
          assert(i == 321);
      }
  
    return 0;
  }
  