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++03, c++11, c++14 10 11 // UNSUPPORTED: availability-filesystem-missing 12 13 // <fstream> 14 15 // plate <class charT, class traits = char_traits<charT> > 16 // class basic_fstream 17 18 // void open(const filesystem::path& s, ios_base::openmode mode = ios_base::in|ios_base::out); 19 20 #include <fstream> 21 #include <filesystem> 22 #include <cassert> 23 #include "test_macros.h" 24 #include "platform_support.h" 25 main(int,char **)26int main(int, char**) { 27 std::filesystem::path p = get_temp_file_name(); 28 { 29 std::fstream stream; 30 assert(!stream.is_open()); 31 stream.open(p, 32 std::ios_base::in | std::ios_base::out | std::ios_base::trunc); 33 assert(stream.is_open()); 34 double x = 0; 35 stream << 3.25; 36 stream.seekg(0); 37 stream >> x; 38 assert(x == 3.25); 39 } 40 std::remove(p.string().c_str()); 41 42 #ifndef TEST_HAS_NO_WIDE_CHARACTERS 43 { 44 std::wfstream stream; 45 assert(!stream.is_open()); 46 stream.open(p, 47 std::ios_base::in | std::ios_base::out | std::ios_base::trunc); 48 assert(stream.is_open()); 49 double x = 0; 50 stream << 3.25; 51 stream.seekg(0); 52 stream >> x; 53 assert(x == 3.25); 54 } 55 std::remove(p.string().c_str()); 56 #endif 57 58 return 0; 59 } 60