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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <fstream>
// template <class charT, class traits = char_traits<charT> >
// class basic_fstream
// explicit basic_fstream(const char* s, ios_base::openmode mode = ios_base::in | ios_base::out);
// In C++23 and later, this test requires support for P2467R1 in the dylib (a3f17ba3febbd546f2342ffc780ac93b694fdc8d)
// XFAIL: (!c++03 && !c++11 && !c++14 && !c++17 && !c++20) && using-built-library-before-llvm-18
// XFAIL: LIBCXX-AIX-FIXME
// XFAIL: FROZEN-CXX03-HEADERS-FIXME
#include <fstream>
#include <cassert>
#include "test_macros.h"
#include "platform_support.h"
#include "operator_hijacker.h"
int main(int, char**)
{
std::string temp = get_temp_file_name();
{
std::fstream fs(temp.c_str(), std::ios_base::in | std::ios_base::out
| std::ios_base::trunc);
double x = 0;
fs << 3.25;
fs.seekg(0);
fs >> x;
assert(x == 3.25);
}
std::remove(temp.c_str());
{
std::basic_fstream<char, operator_hijacker_char_traits<char> > fs(
temp.c_str(), std::ios_base::in | std::ios_base::out | std::ios_base::trunc);
std::basic_string<char, operator_hijacker_char_traits<char> > x;
fs << "3.25";
fs.seekg(0);
fs >> x;
assert(x == "3.25");
}
std::remove(temp.c_str());
#ifndef TEST_HAS_NO_WIDE_CHARACTERS
{
std::wfstream fs(temp.c_str(), std::ios_base::in | std::ios_base::out
| std::ios_base::trunc);
double x = 0;
fs << 3.25;
fs.seekg(0);
fs >> x;
assert(x == 3.25);
}
std::remove(temp.c_str());
{
std::basic_fstream<wchar_t, operator_hijacker_char_traits<wchar_t> > fs(
temp.c_str(), std::ios_base::in | std::ios_base::out | std::ios_base::trunc);
std::basic_string<wchar_t, operator_hijacker_char_traits<wchar_t> > x;
fs << L"3.25";
fs.seekg(0);
fs >> x;
assert(x == L"3.25");
}
std::remove(temp.c_str());
#endif
#if TEST_STD_VER >= 23
// Test all the noreplace flag combinations
{
std::ios_base::openmode modes[] = {
std::ios_base::out | std::ios_base::noreplace,
std::ios_base::out | std::ios_base::trunc | std::ios_base::noreplace,
std::ios_base::in | std::ios_base::out | std::ios_base::trunc | std::ios_base::noreplace,
std::ios_base::out | std::ios_base::noreplace | std::ios_base::binary,
std::ios_base::out | std::ios_base::trunc | std::ios_base::noreplace | std::ios_base::binary,
std::ios_base::in | std::ios_base::out | std::ios_base::trunc | std::ios_base::noreplace |
std::ios_base::binary,
};
for (auto mode : modes) {
std::string tmp = get_temp_file_name(); // also creates the file
{
std::fstream f(tmp.c_str(), mode);
assert(!f.is_open()); // since it already exists
}
{
std::remove(tmp.c_str());
std::fstream f(tmp.c_str(), mode);
assert(f.is_open()); // since it doesn't exist
}
}
# ifndef TEST_HAS_NO_WIDE_CHARACTERS
for (auto mode : modes) {
std::string tmp = get_temp_file_name(); // also creates the file
{
std::wfstream f(tmp.c_str(), mode);
assert(!f.is_open()); // since it already exists
}
{
std::remove(tmp.c_str());
std::wfstream f(tmp.c_str(), mode);
assert(f.is_open()); // since it doesn't exist
}
}
# endif
}
#endif // TEST_STD_VER >= 23
return 0;
}
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