113 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_fstream13 14// void open(const char* s, ios_base::openmode mode = ios_base::in|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::fstream fs;31 assert(!fs.is_open());32 fs.open(temp.c_str(), std::ios_base::in | std::ios_base::out33 | std::ios_base::trunc);34 assert(fs.is_open());35 double x = 0;36 fs << 3.25;37 fs.seekg(0);38 fs >> x;39 assert(x == 3.25);40 }41 std::remove(temp.c_str());42 43#ifndef TEST_HAS_NO_WIDE_CHARACTERS44 {45 std::wfstream fs;46 assert(!fs.is_open());47 fs.open(temp.c_str(), std::ios_base::in | std::ios_base::out48 | std::ios_base::trunc);49 assert(fs.is_open());50 double x = 0;51 fs << 3.25;52 fs.seekg(0);53 fs >> x;54 assert(x == 3.25);55 }56 std::remove(temp.c_str());57#endif58 59#if TEST_STD_VER >= 2360 // Test all the noreplace flag combinations61 {62 std::ios_base::openmode modes[] = {63 std::ios_base::out | std::ios_base::noreplace,64 std::ios_base::out | std::ios_base::trunc | std::ios_base::noreplace,65 std::ios_base::in | std::ios_base::out | std::ios_base::trunc | std::ios_base::noreplace,66 std::ios_base::out | std::ios_base::noreplace | std::ios_base::binary,67 std::ios_base::out | std::ios_base::trunc | std::ios_base::noreplace | std::ios_base::binary,68 std::ios_base::in | std::ios_base::out | std::ios_base::trunc | std::ios_base::noreplace |69 std::ios_base::binary,70 };71 for (auto mode : modes) {72 std::string tmp = get_temp_file_name(); // also creates the file73 74 {75 std::fstream f;76 f.open(tmp.c_str(), mode);77 assert(!f.is_open()); // since it already exists78 }79 80 {81 std::remove(tmp.c_str());82 83 std::fstream f;84 f.open(tmp.c_str(), mode);85 assert(f.is_open()); // since it doesn't exist86 }87 }88 89# ifndef TEST_HAS_NO_WIDE_CHARACTERS90 for (auto mode : modes) {91 std::string tmp = get_temp_file_name(); // also creates the file92 93 {94 std::wfstream f;95 f.open(tmp.c_str(), mode);96 assert(!f.is_open()); // since it already exists97 }98 99 {100 std::remove(tmp.c_str());101 102 std::wfstream f;103 f.open(tmp.c_str(), mode);104 assert(f.is_open()); // since it doesn't exist105 }106 }107# endif108 }109#endif // TEST_STD_VER >= 23110 111 return 0;112}113