test/std/input.output/file.streams/fstreams/fstream.members/open_path.pass.cpp

//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//

// UNSUPPORTED: c++03, c++11, c++14
// UNSUPPORTED: libcpp-has-no-filesystem-library

// Filesystem is supported on Apple platforms starting with macosx10.15.
// UNSUPPORTED: use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11|12|13|14}}

// <fstream>

// plate <class charT, class traits = char_traits<charT> >
// class basic_fstream

// void open(const filesystem::path& s, ios_base::openmode mode = ios_base::in|ios_base::out);

#include <fstream>
#include <filesystem>
#include <cassert>
#include "test_macros.h"
#include "platform_support.h"

int main(int, char**) {
  std::filesystem::path p = get_temp_file_name();
  {
    std::fstream stream;
    assert(!stream.is_open());
    stream.open(p,
                std::ios_base::in | std::ios_base::out | std::ios_base::trunc);
    assert(stream.is_open());
    double x = 0;
    stream << 3.25;
    stream.seekg(0);
    stream >> x;
    assert(x == 3.25);
  }
  std::remove(p.string().c_str());

#ifndef TEST_HAS_NO_WIDE_CHARACTERS
  {
    std::wfstream stream;
    assert(!stream.is_open());
    stream.open(p,
                std::ios_base::in | std::ios_base::out | std::ios_base::trunc);
    assert(stream.is_open());
    double x = 0;
    stream << 3.25;
    stream.seekg(0);
    stream >> x;
    assert(x == 3.25);
  }
  std::remove(p.string().c_str());
#endif

  return 0;
}