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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 // <fstream>
     11 
     12 // template <class charT, class traits = char_traits<charT> >
     13 // class basic_ofstream
     14 
     15 // void open(const string& s, ios_base::openmode mode = ios_base::out);
     16 
     17 #include <fstream>
     18 #include <cassert>
     19 #include "platform_support.h"
     20 
     21 int main()
     22 {
     23     std::string temp = get_temp_file_name();
     24     {
     25         std::ofstream fs;
     26         assert(!fs.is_open());
     27         char c = 'a';
     28         fs << c;
     29         assert(fs.fail());
     30         fs.open(temp);
     31         assert(fs.is_open());
     32         fs << c;
     33     }
     34     {
     35         std::ifstream fs(temp.c_str());
     36         char c = 0;
     37         fs >> c;
     38         assert(c == 'a');
     39     }
     40     std::remove(temp.c_str());
     41     {
     42         std::wofstream fs;
     43         assert(!fs.is_open());
     44         wchar_t c = L'a';
     45         fs << c;
     46         assert(fs.fail());
     47         fs.open(temp);
     48         assert(fs.is_open());
     49         fs << c;
     50     }
     51     {
     52         std::wifstream fs(temp.c_str());
     53         wchar_t c = 0;
     54         fs >> c;
     55         assert(c == L'a');
     56     }
     57     std::remove(temp.c_str());
     58 }
     59