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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 // <strstream>
     11 
     12 // class strstream
     13 
     14 // void freeze(bool freezefl = true);
     15 
     16 #include <strstream>
     17 #include <cassert>
     18 
     19 int main()
     20 {
     21     {
     22         std::strstream out;
     23         out.freeze();
     24         assert(!out.fail());
     25         out << 'a';
     26         assert(out.fail());
     27         out.clear();
     28         out.freeze(false);
     29         out << 'a';
     30         out << char(0);
     31         assert(out.str() == std::string("a"));
     32     }
     33 }
     34