106 lines
2.6 KiB
C++
106 lines
2.6 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// <fstream>
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// template <class charT, class traits = char_traits<charT> >
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// class basic_ofstream
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// template <class charT, class traits>
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// void swap(basic_ofstream<charT, traits>& x, basic_ofstream<charT, traits>& y);
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#include <fstream>
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#include <utility>
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#include <cassert>
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#include "test_macros.h"
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#include "platform_support.h"
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std::pair<std::string, std::string> get_temp_file_names() {
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std::pair<std::string, std::string> names;
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names.first = get_temp_file_name();
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// Create the file so the next call to `get_temp_file_name()` doesn't
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// return the same file.
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std::FILE *fd1 = std::fopen(names.first.c_str(), "w");
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names.second = get_temp_file_name();
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assert(names.first != names.second);
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std::fclose(fd1);
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std::remove(names.first.c_str());
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return names;
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}
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int main(int, char**)
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{
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std::pair<std::string, std::string> temp_files = get_temp_file_names();
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std::string& temp1 = temp_files.first;
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std::string& temp2 = temp_files.second;
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assert(temp1 != temp2);
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{
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std::ofstream fs1(temp1.c_str());
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std::ofstream fs2(temp2.c_str());
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fs1 << 3.25;
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fs2 << 4.5;
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swap(fs1, fs2);
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fs1 << ' ' << 3.25;
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fs2 << ' ' << 4.5;
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}
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{
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std::ifstream fs(temp1.c_str());
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double x = 0;
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fs >> x;
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assert(x == 3.25);
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fs >> x;
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assert(x == 4.5);
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}
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std::remove(temp1.c_str());
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{
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std::ifstream fs(temp2.c_str());
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double x = 0;
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fs >> x;
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assert(x == 4.5);
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fs >> x;
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assert(x == 3.25);
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}
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std::remove(temp2.c_str());
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#ifndef TEST_HAS_NO_WIDE_CHARACTERS
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{
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std::wofstream fs1(temp1.c_str());
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std::wofstream fs2(temp2.c_str());
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fs1 << 3.25;
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fs2 << 4.5;
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swap(fs1, fs2);
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fs1 << ' ' << 3.25;
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fs2 << ' ' << 4.5;
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}
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{
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std::wifstream fs(temp1.c_str());
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double x = 0;
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fs >> x;
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assert(x == 3.25);
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fs >> x;
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assert(x == 4.5);
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}
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std::remove(temp1.c_str());
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{
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std::wifstream fs(temp2.c_str());
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double x = 0;
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fs >> x;
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assert(x == 4.5);
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fs >> x;
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assert(x == 3.25);
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}
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std::remove(temp2.c_str());
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#endif
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return 0;
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}
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