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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& operator=(const flat_set& m);
#include <algorithm>
#include <deque>
#include <flat_set>
#include <functional>
#include <vector>
#include "operator_hijacker.h"
#include "test_macros.h"
#include "../../../test_compare.h"
#include "test_allocator.h"
template <template <class...> class KeyContainer>
constexpr void test() {
{
// test_allocator is not propagated
using C = test_less<int>;
KeyContainer<int, test_allocator<int>> ks({1, 3, 5}, test_allocator<int>(6));
using M = std::flat_set<int, C, decltype(ks)>;
auto mo = M(ks, C(5));
auto m = M({{3, 4, 5}}, C(3), test_allocator<int>(2));
m = mo;
assert(m.key_comp() == C(5));
assert(std::ranges::equal(m, ks));
auto keys = std::move(m).extract();
assert(keys.get_allocator() == test_allocator<int>(2));
// mo is unchanged
assert(mo.key_comp() == C(5));
assert(std::ranges::equal(mo, ks));
auto keys2 = std::move(mo).extract();
assert(keys2.get_allocator() == test_allocator<int>(6));
}
{
// other_allocator is propagated
using C = test_less<int>;
using Ks = KeyContainer<int, other_allocator<int>>;
auto ks = Ks({1, 3, 5}, other_allocator<int>(6));
using M = std::flat_set<int, C, Ks>;
auto mo = M(Ks(ks, other_allocator<int>(6)), C(5));
auto m = M({3, 4, 5}, C(3), other_allocator<int>(2));
m = mo;
assert(m.key_comp() == C(5));
assert(std::ranges::equal(m, ks));
auto keys = std::move(m).extract();
assert(keys.get_allocator() == other_allocator<int>(6));
// mo is unchanged
assert(mo.key_comp() == C(5));
assert(std::ranges::equal(mo, ks));
auto keys2 = std::move(mo).extract();
assert(keys2.get_allocator() == other_allocator<int>(6));
}
if (!TEST_IS_CONSTANT_EVALUATED) {
// comparator is copied and invariant is preserved
using M = std::flat_set<int, std::function<bool(int, int)>, KeyContainer<int>>;
M mo = M({1, 2}, std::less<int>());
M m = M({1, 2}, std::greater<int>());
assert(m.key_comp()(2, 1) == true);
assert(m != mo);
m = mo;
assert(m.key_comp()(2, 1) == false);
assert(m == mo);
}
{
// self-assignment
using M = std::flat_set<int, std::less<int>, KeyContainer<int>>;
M m = {{1, 2}};
m = static_cast<const M&>(m);
assert((m == M{{1, 2}}));
}
{
// Validate whether the container can be copy-assigned (move-assigned, swapped)
// with an ADL-hijacking operator&
std::flat_set<operator_hijacker> so;
std::flat_set<operator_hijacker> s;
s = so;
s = std::move(so);
swap(s, so);
}
}
constexpr bool test() {
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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