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 // UNSUPPORTED: c++98, c++03, c++11, c++14 10 11 // <fstream> 12 13 // plate <class charT, class traits = char_traits<charT> > 14 // class basic_fstream 15 16 // void open(const filesystem::path& s, ios_base::openmode mode = ios_base::in|ios_base::out); 17 18 #include <fstream> 19 #include <filesystem> 20 #include <cassert> 21 #include "platform_support.h" 22 23 int main() { 24 std::filesystem::path p = get_temp_file_name(); 25 { 26 std::fstream stream; 27 assert(!stream.is_open()); 28 stream.open(p, 29 std::ios_base::in | std::ios_base::out | std::ios_base::trunc); 30 assert(stream.is_open()); 31 double x = 0; 32 stream << 3.25; 33 stream.seekg(0); 34 stream >> x; 35 assert(x == 3.25); 36 } 37 std::remove(p.c_str()); 38 { 39 std::wfstream stream; 40 assert(!stream.is_open()); 41 stream.open(p, 42 std::ios_base::in | std::ios_base::out | std::ios_base::trunc); 43 assert(stream.is_open()); 44 double x = 0; 45 stream << 3.25; 46 stream.seekg(0); 47 stream >> x; 48 assert(x == 3.25); 49 } 50 std::remove(p.c_str()); 51 } 52