Home | History | Annotate | Download | only in ifstream.members
      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 // <fstream>
     11 
     12 // template <class charT, class traits = char_traits<charT> >
     13 // class basic_ifstream
     14 
     15 // void open(const char* s, ios_base::openmode mode = ios_base::in);
     16 
     17 #include <fstream>
     18 #include <cassert>
     19 
     20 int main()
     21 {
     22     {
     23         std::ifstream fs;
     24         assert(!fs.is_open());
     25         char c = 'a';
     26         fs >> c;
     27         assert(fs.fail());
     28         assert(c == 'a');
     29         fs.open("test.dat");
     30         assert(fs.is_open());
     31         fs >> c;
     32         assert(c == 'r');
     33     }
     34     {
     35         std::wifstream fs;
     36         assert(!fs.is_open());
     37         wchar_t c = L'a';
     38         fs >> c;
     39         assert(fs.fail());
     40         assert(c == L'a');
     41         fs.open("test.dat");
     42         assert(fs.is_open());
     43         fs >> c;
     44         assert(c == L'r');
     45     }
     46 }
     47