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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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14
// UNSUPPORTED: no-filesystem
// UNSUPPORTED: availability-filesystem-missing
// <filesystem>
// class directory_iterator
// directory_iterator& operator=(directory_iterator const&);
#include <filesystem>
#include <type_traits>
#include <set>
#include <cassert>
#include "test_macros.h"
#include "filesystem_test_helper.h"
namespace fs = std::filesystem;
using namespace fs;
// The filesystem specification explicitly allows for self-move on
// the directory iterators. Turn off this warning so we can test it.
TEST_CLANG_DIAGNOSTIC_IGNORED("-Wself-move")
static void test_assignment_signature()
{
using D = directory_iterator;
static_assert(std::is_nothrow_move_assignable<D>::value, "");
}
static void test_move_to_end_iterator()
{
static_test_env static_env;
const path testDir = static_env.Dir;
directory_iterator from(testDir);
assert(from != directory_iterator{});
const path entry = *from;
directory_iterator to{};
to = std::move(from);
assert(to != directory_iterator{});
assert(*to == entry);
}
static void test_move_from_end_iterator()
{
static_test_env static_env;
const path testDir = static_env.Dir;
directory_iterator from{};
directory_iterator to(testDir);
assert(to != from);
to = std::move(from);
assert(to == directory_iterator{});
assert(from == directory_iterator{});
}
static void test_move_valid_iterator()
{
static_test_env static_env;
const path testDir = static_env.Dir;
const directory_iterator endIt{};
directory_iterator it(testDir);
assert(it != endIt);
++it;
assert(it != endIt);
const path entry = *it;
directory_iterator it2(testDir);
assert(it2 != it);
const path entry2 = *it2;
assert(entry2 != entry);
it2 = std::move(it);
assert(it2 != directory_iterator{});
assert(*it2 == entry);
}
static void test_returns_reference_to_self()
{
directory_iterator it;
directory_iterator it2;
directory_iterator& ref = (it2 = it);
assert(&ref == &it2);
}
static void test_self_move()
{
static_test_env static_env;
// Create two non-equal iterators that have exactly the same state.
directory_iterator it(static_env.Dir);
directory_iterator it2(static_env.Dir);
++it; ++it2;
assert(it != it2);
assert(*it2 == *it);
it = std::move(it);
assert(*it2 == *it);
}
int main(int, char**) {
test_assignment_signature();
test_move_to_end_iterator();
test_move_from_end_iterator();
test_move_valid_iterator();
test_returns_reference_to_self();
test_self_move();
return 0;
}
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