test/std/input.output/file.streams/fstreams/filebuf.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>

// basic_filebuf<charT,traits>* open(const filesystem::path& p, ios_base::openmode mode);

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

namespace fs = std::filesystem;

int main(int, char**) {

  fs::path p = get_temp_file_name();
  {
    std::filebuf f;
    assert(f.open(p, std::ios_base::out) != 0);
    assert(f.is_open());
    assert(f.sputn("123", 3) == 3);
  }
  {
    std::filebuf f;
    assert(f.open(p, std::ios_base::in) != 0);
    assert(f.is_open());
    assert(f.sbumpc() == '1');
    assert(f.sbumpc() == '2');
    assert(f.sbumpc() == '3');
  }
  std::remove(p.string().c_str());

#ifndef TEST_HAS_NO_WIDE_CHARACTERS
  {
    std::wfilebuf f;
    assert(f.open(p, std::ios_base::out) != 0);
    assert(f.is_open());
    assert(f.sputn(L"123", 3) == 3);
  }
  {
    std::wfilebuf f;
    assert(f.open(p, std::ios_base::in) != 0);
    assert(f.is_open());
    assert(f.sbumpc() == L'1');
    assert(f.sbumpc() == L'2');
    assert(f.sbumpc() == L'3');
  }
  std::remove(p.string().c_str());
#endif

  return 0;
}