120 lines · cpp
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-exception6//7//===----------------------------------------------------------------------===//8 9// <fstream>10 11// template <class charT, class traits = char_traits<charT> >12// class basic_ofstream13 14// void open(const char* s, ios_base::openmode mode = ios_base::out);15 16// In C++23 and later, this test requires support for P2467R1 in the dylib (a3f17ba3febbd546f2342ffc780ac93b694fdc8d)17// XFAIL: (!c++03 && !c++11 && !c++14 && !c++17 && !c++20) && using-built-library-before-llvm-1818 19// XFAIL: LIBCXX-AIX-FIXME20 21#include <fstream>22#include <cassert>23#include "test_macros.h"24#include "platform_support.h"25 26int main(int, char**)27{28 std::string temp = get_temp_file_name();29 {30 std::ofstream fs;31 assert(!fs.is_open());32 char c = 'a';33 fs << c;34 assert(fs.fail());35 fs.open(temp.c_str());36 assert(fs.is_open());37 fs << c;38 }39 {40 std::ifstream fs(temp.c_str());41 char c = 0;42 fs >> c;43 assert(c == 'a');44 }45 std::remove(temp.c_str());46 47#ifndef TEST_HAS_NO_WIDE_CHARACTERS48 {49 std::wofstream fs;50 assert(!fs.is_open());51 wchar_t c = L'a';52 fs << c;53 assert(fs.fail());54 fs.open(temp.c_str());55 assert(fs.is_open());56 fs << c;57 }58 {59 std::wifstream fs(temp.c_str());60 wchar_t c = 0;61 fs >> c;62 assert(c == L'a');63 }64 std::remove(temp.c_str());65#endif66 67#if TEST_STD_VER >= 2368 // Test all the noreplace flag combinations69 {70 std::ios_base::openmode modes[] = {71 std::ios_base::out | std::ios_base::noreplace,72 std::ios_base::out | std::ios_base::trunc | std::ios_base::noreplace,73 std::ios_base::in | std::ios_base::out | std::ios_base::trunc | std::ios_base::noreplace,74 std::ios_base::out | std::ios_base::noreplace | std::ios_base::binary,75 std::ios_base::out | std::ios_base::trunc | std::ios_base::noreplace | std::ios_base::binary,76 std::ios_base::in | std::ios_base::out | std::ios_base::trunc | std::ios_base::noreplace |77 std::ios_base::binary,78 };79 for (auto mode : modes) {80 std::string tmp = get_temp_file_name(); // also creates the file81 82 {83 std::ofstream f;84 f.open(tmp.c_str(), mode);85 assert(!f.is_open()); // since it already exists86 }87 88 {89 std::remove(tmp.c_str());90 91 std::ofstream f;92 f.open(tmp.c_str(), mode);93 assert(f.is_open()); // since it doesn't exist94 }95 }96 97# ifndef TEST_HAS_NO_WIDE_CHARACTERS98 for (auto mode : modes) {99 std::string tmp = get_temp_file_name(); // also creates the file100 101 {102 std::wofstream f;103 f.open(tmp.c_str(), mode);104 assert(!f.is_open()); // since it already exists105 }106 {107 std::remove(tmp.c_str());108 109 std::wofstream f;110 f.open(tmp.c_str(), mode);111 assert(f.is_open()); // since it doesn't exist112 }113 }114# endif115 }116#endif // TEST_STD_VER >= 23117 118 return 0;119}120