95 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9// UNSUPPORTED: c++03, c++11, c++14, c++17, c++2010 11// <flat_set>12 13// flat_set(flat_set&&, const allocator_type&);14 15#include <algorithm>16#include <deque>17#include <flat_set>18#include <functional>19#include <ranges>20#include <vector>21 22#include "../helpers.h"23#include "test_macros.h"24#include "../../../test_compare.h"25#include "test_allocator.h"26 27template <template <class...> class KeyContainer>28constexpr void test() {29 {30 int expected[] = {1, 2, 3};31 using C = test_less<int>;32 using A = test_allocator<int>;33 using M = std::flat_set<int, C, KeyContainer<int, A>>;34 auto mo = M(expected, expected + 3, C(5), A(7));35 auto m = M(std::move(mo), A(3));36 37 assert(m.key_comp() == C(5));38 assert(m.size() == 3);39 auto keys = std::move(m).extract();40 assert(keys.get_allocator() == A(3));41 assert(std::ranges::equal(keys, expected));42 43 // The original flat_set is moved-from.44 assert(std::is_sorted(mo.begin(), mo.end(), mo.value_comp()));45 assert(mo.empty());46 assert(mo.key_comp() == C(5));47 assert(std::move(mo).extract().get_allocator() == A(7));48 }49 {50 // moved-from object maintains invariant if one of underlying container does not clear after move51 using M = std::flat_set<int, std::less<>, CopyOnlyVector<int>>;52 M m1 = M({1, 2, 3});53 M m2(std::move(m1), std::allocator<int>{});54 assert(m2.size() == 3);55 check_invariant(m1);56 LIBCPP_ASSERT(m1.empty());57 }58}59 60constexpr bool test() {61 {62 // The constructors in this subclause shall not participate in overload63 // resolution unless uses_allocator_v<container_type, Alloc> is true.64 65 using C = test_less<int>;66 using A1 = test_allocator<int>;67 using A2 = other_allocator<int>;68 using V1 = std::vector<int, A1>;69 using V2 = std::vector<int, A2>;70 using M1 = std::flat_set<int, C, V1>;71 using M2 = std::flat_set<int, C, V2>;72 static_assert(std::is_constructible_v<M1, M1&&, const A1&>);73 static_assert(std::is_constructible_v<M2, M2&&, const A2&>);74 static_assert(!std::is_constructible_v<M1, M1&&, const A2&>);75 static_assert(!std::is_constructible_v<M2, M2&&, const A1&>);76 }77 78 test<std::vector>();79#ifndef __cpp_lib_constexpr_deque80 if (!TEST_IS_CONSTANT_EVALUATED)81#endif82 test<std::deque>();83 84 return true;85}86 87int main(int, char**) {88 test();89#if TEST_STD_VER >= 2690 static_assert(test());91#endif92 93 return 0;94}95