1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 // <fstream> 10 11 // template <class charT, class traits = char_traits<charT> > 12 // class basic_ofstream 13 14 // void open(const string& s, ios_base::openmode mode = ios_base::out); 15 16 #include <fstream> 17 #include <cassert> 18 #include "test_macros.h" 19 #include "platform_support.h" 20 main(int,char **)21int main(int, char**) 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 #ifndef TEST_HAS_NO_WIDE_CHARACTERS 43 { 44 std::wofstream fs; 45 assert(!fs.is_open()); 46 wchar_t c = L'a'; 47 fs << c; 48 assert(fs.fail()); 49 fs.open(temp); 50 assert(fs.is_open()); 51 fs << c; 52 } 53 { 54 std::wifstream fs(temp.c_str()); 55 wchar_t c = 0; 56 fs >> c; 57 assert(c == L'a'); 58 } 59 std::remove(temp.c_str()); 60 #endif 61 62 return 0; 63 } 64