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      1 //===----------------------------------------------------------------------===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is dual licensed under the MIT and the University of Illinois Open
      6 // Source Licenses. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 
     10 // <sstream>
     11 
     12 // template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
     13 // class basic_ostringstream
     14 
     15 // basic_ostringstream& operator=(basic_ostringstream&& rhs);
     16 
     17 #include <sstream>
     18 #include <cassert>
     19 
     20 int main()
     21 {
     22 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     23     {
     24         std::ostringstream ss0(" 123 456");
     25         std::ostringstream ss;
     26         ss = std::move(ss0);
     27         assert(ss.rdbuf() != 0);
     28         assert(ss.good());
     29         assert(ss.str() == " 123 456");
     30         int i = 234;
     31         ss << i << ' ' << 567;;
     32         assert(ss.str() == "234 5676");
     33     }
     34     {
     35         std::wostringstream ss0(L" 123 456");
     36         std::wostringstream ss;
     37         ss = std::move(ss0);
     38         assert(ss.rdbuf() != 0);
     39         assert(ss.good());
     40         assert(ss.str() == L" 123 456");
     41         int i = 234;
     42         ss << i << ' ' << 567;;
     43         assert(ss.str() == L"234 5676");
     44     }
     45 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
     46 }
     47