test/std/input.output/filesystems/class.path/path.member/path.assign/move.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: availability-filesystem-missing

// <filesystem>

// class path

// path& operator=(path&&) noexcept

#include <filesystem>
#include <cassert>
#include <string>
#include <type_traits>

#include "test_macros.h"
#include "count_new.h"
namespace fs = std::filesystem;

int main(int, char**) {
  using namespace fs;
  static_assert(std::is_nothrow_move_assignable<path>::value, "");
  assert(globalMemCounter.checkOutstandingNewEq(0));
  const std::string s("we really really really really really really really "
                      "really really long string so that we allocate");
  ASSERT_WITH_LIBRARY_INTERNAL_ALLOCATIONS(
      globalMemCounter.checkOutstandingNewLessThanOrEqual(1));
  const fs::path::string_type ps(s.begin(), s.end());
  path p(s);
  {
    DisableAllocationGuard g;
    path p2;
    path& pref = (p2 = std::move(p));
    assert(p2.native() == ps);
    assert(p.native() != ps); // Testing moved from state
    assert(&pref == &p2);
  }

  return 0;
}