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_fstream 14 15 // void open(const string& s, ios_base::openmode mode = ios_base::in|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::fstream fs; 26 assert(!fs.is_open()); 27 fs.open(temp, std::ios_base::in | std::ios_base::out 28 | std::ios_base::trunc); 29 assert(fs.is_open()); 30 double x = 0; 31 fs << 3.25; 32 fs.seekg(0); 33 fs >> x; 34 assert(x == 3.25); 35 } 36 std::remove(temp.c_str()); 37 { 38 std::wfstream fs; 39 assert(!fs.is_open()); 40 fs.open(temp, std::ios_base::in | std::ios_base::out 41 | std::ios_base::trunc); 42 assert(fs.is_open()); 43 double x = 0; 44 fs << 3.25; 45 fs.seekg(0); 46 fs >> x; 47 assert(x == 3.25); 48 } 49 std::remove(temp.c_str()); 50 } 51
