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 // basic_filebuf<charT,traits>* open(const filesystem::path& p, ios_base::openmode mode); 14 15 #include <fstream> 16 #include <filesystem> 17 #include <cassert> 18 #include "platform_support.h" 19 20 namespace fs = std::filesystem; 21 22 int main(int, char**) { 23 24 fs::path p = get_temp_file_name(); 25 { 26 std::filebuf f; 27 assert(f.open(p, std::ios_base::out) != 0); 28 assert(f.is_open()); 29 assert(f.sputn("123", 3) == 3); 30 } 31 { 32 std::filebuf f; 33 assert(f.open(p, std::ios_base::in) != 0); 34 assert(f.is_open()); 35 assert(f.sbumpc() == '1'); 36 assert(f.sbumpc() == '2'); 37 assert(f.sbumpc() == '3'); 38 } 39 std::remove(p.c_str()); 40 { 41 std::wfilebuf f; 42 assert(f.open(p, std::ios_base::out) != 0); 43 assert(f.is_open()); 44 assert(f.sputn(L"123", 3) == 3); 45 } 46 { 47 std::wfilebuf f; 48 assert(f.open(p, std::ios_base::in) != 0); 49 assert(f.is_open()); 50 assert(f.sbumpc() == L'1'); 51 assert(f.sbumpc() == L'2'); 52 assert(f.sbumpc() == L'3'); 53 } 54 remove(p.c_str()); 55 56 return 0; 57 } 58