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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 istrstream
     13 
     14 // explicit istrstream(char* s);
     15 
     16 #include <strstream>
     17 #include <cassert>
     18 
     19 int main()
     20 {
     21     {
     22         char buf[] = "123 4.5 dog";
     23         std::istrstream in(buf);
     24         int i;
     25         in >> i;
     26         assert(i == 123);
     27         double d;
     28         in >> d;
     29         assert(d == 4.5);
     30         std::string s;
     31         in >> s;
     32         assert(s == "dog");
     33         assert(in.eof());
     34         assert(!in.fail());
     35         in.clear();
     36         in.putback('g');
     37         assert(!in.fail());
     38         in.putback('g');
     39         assert(!in.fail());
     40         assert(buf[9] == 'g');
     41         assert(buf[10] == 'g');
     42     }
     43 }
     44