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 // template <class charT, class traits> 16 // void swap(basic_fstream<charT, traits>& x, basic_fstream<charT, traits>& y); 17 18 #include <fstream> 19 #include <cassert> 20 #include "platform_support.h" 21 22 int main() 23 { 24 std::string temp1 = get_temp_file_name(); 25 std::string temp2 = get_temp_file_name(); 26 { 27 std::fstream fs1(temp1.c_str(), std::ios_base::in | std::ios_base::out 28 | std::ios_base::trunc); 29 std::fstream fs2(temp2.c_str(), std::ios_base::in | std::ios_base::out 30 | std::ios_base::trunc); 31 fs1 << 1 << ' ' << 2; 32 fs2 << 2 << ' ' << 1; 33 fs1.seekg(0); 34 swap(fs1, fs2); 35 fs1.seekg(0); 36 int i; 37 fs1 >> i; 38 assert(i == 2); 39 fs1 >> i; 40 assert(i == 1); 41 i = 0; 42 fs2 >> i; 43 assert(i == 1); 44 fs2 >> i; 45 assert(i == 2); 46 } 47 std::remove(temp1.c_str()); 48 std::remove(temp2.c_str()); 49 { 50 std::wfstream fs1(temp1.c_str(), std::ios_base::in | std::ios_base::out 51 | std::ios_base::trunc); 52 std::wfstream fs2(temp2.c_str(), std::ios_base::in | std::ios_base::out 53 | std::ios_base::trunc); 54 fs1 << 1 << ' ' << 2; 55 fs2 << 2 << ' ' << 1; 56 fs1.seekg(0); 57 swap(fs1, fs2); 58 fs1.seekg(0); 59 int i; 60 fs1 >> i; 61 assert(i == 2); 62 fs1 >> i; 63 assert(i == 1); 64 i = 0; 65 fs2 >> i; 66 assert(i == 1); 67 fs2 >> i; 68 assert(i == 2); 69 } 70 std::remove(temp1.c_str()); 71 std::remove(temp2.c_str()); 72 } 73
