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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 
main()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         out.freeze(false);
33     }
34 }
35