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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, c++17, c++20
// <flat_set>
// flat_set(flat_set&&, const allocator_type&);
#include <algorithm>
#include <deque>
#include <flat_set>
#include <functional>
#include <ranges>
#include <vector>
#include "../helpers.h"
#include "test_macros.h"
#include "../../../test_compare.h"
#include "test_allocator.h"
template <template <class...> class KeyContainer>
constexpr void test() {
{
int expected[] = {1, 2, 3};
using C = test_less<int>;
using A = test_allocator<int>;
using M = std::flat_set<int, C, KeyContainer<int, A>>;
auto mo = M(expected, expected + 3, C(5), A(7));
auto m = M(std::move(mo), A(3));
assert(m.key_comp() == C(5));
assert(m.size() == 3);
auto keys = std::move(m).extract();
assert(keys.get_allocator() == A(3));
assert(std::ranges::equal(keys, expected));
// The original flat_set is moved-from.
assert(std::is_sorted(mo.begin(), mo.end(), mo.value_comp()));
assert(mo.empty());
assert(mo.key_comp() == C(5));
assert(std::move(mo).extract().get_allocator() == A(7));
}
{
// moved-from object maintains invariant if one of underlying container does not clear after move
using M = std::flat_set<int, std::less<>, CopyOnlyVector<int>>;
M m1 = M({1, 2, 3});
M m2(std::move(m1), std::allocator<int>{});
assert(m2.size() == 3);
check_invariant(m1);
LIBCPP_ASSERT(m1.empty());
}
}
constexpr bool test() {
{
// The constructors in this subclause shall not participate in overload
// resolution unless uses_allocator_v<container_type, Alloc> is true.
using C = test_less<int>;
using A1 = test_allocator<int>;
using A2 = other_allocator<int>;
using V1 = std::vector<int, A1>;
using V2 = std::vector<int, A2>;
using M1 = std::flat_set<int, C, V1>;
using M2 = std::flat_set<int, C, V2>;
static_assert(std::is_constructible_v<M1, M1&&, const A1&>);
static_assert(std::is_constructible_v<M2, M2&&, const A2&>);
static_assert(!std::is_constructible_v<M1, M1&&, const A2&>);
static_assert(!std::is_constructible_v<M2, M2&&, const A1&>);
}
test<std::vector>();
#ifndef __cpp_lib_constexpr_deque
if (!TEST_IS_CONSTANT_EVALUATED)
#endif
test<std::deque>();
return true;
}
int main(int, char**) {
test();
#if TEST_STD_VER >= 26
static_assert(test());
#endif
return 0;
}
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