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 // UNSUPPORTED: libcpp-has-no-filesystem-library 11 12 // Filesystem is supported on Apple platforms starting with macosx10.15. 13 // UNSUPPORTED: use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11|12|13|14}} 14 15 // <fstream> 16 17 // plate <class charT, class traits = char_traits<charT> > 18 // class basic_fstream 19 20 // void open(const filesystem::path& s, ios_base::openmode mode = ios_base::in|ios_base::out); 21 22 #include <fstream> 23 #include <filesystem> 24 #include <cassert> 25 #include "test_macros.h" 26 #include "platform_support.h" 27 28 int main(int, char**) { 29 std::filesystem::path p = get_temp_file_name(); 30 { 31 std::fstream stream; 32 assert(!stream.is_open()); 33 stream.open(p, 34 std::ios_base::in | std::ios_base::out | std::ios_base::trunc); 35 assert(stream.is_open()); 36 double x = 0; 37 stream << 3.25; 38 stream.seekg(0); 39 stream >> x; 40 assert(x == 3.25); 41 } 42 std::remove(p.string().c_str()); 43 44 #ifndef TEST_HAS_NO_WIDE_CHARACTERS 45 { 46 std::wfstream stream; 47 assert(!stream.is_open()); 48 stream.open(p, 49 std::ios_base::in | std::ios_base::out | std::ios_base::trunc); 50 assert(stream.is_open()); 51 double x = 0; 52 stream << 3.25; 53 stream.seekg(0); 54 stream >> x; 55 assert(x == 3.25); 56 } 57 std::remove(p.string().c_str()); 58 #endif 59 60 return 0; 61 } 62