219 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// <map>10// UNSUPPORTED: c++03, c++11, c++1411 12// template<class InputIterator,13// class Compare = less<iter-value-type<InputIterator>>,14// class Allocator = allocator<iter-value-type<InputIterator>>>15// multimap(InputIterator, InputIterator,16// Compare = Compare(), Allocator = Allocator())17// -> multimap<iter-value-type<InputIterator>, Compare, Allocator>;18// template<class Key, class Compare = less<Key>, class Allocator = allocator<Key>>19// multimap(initializer_list<Key>, Compare = Compare(), Allocator = Allocator())20// -> multimap<Key, Compare, Allocator>;21// template<class InputIterator, class Allocator>22// multimap(InputIterator, InputIterator, Allocator)23// -> multimap<iter-value-type<InputIterator>, less<iter-value-type<InputIterator>>, Allocator>;24// template<class Key, class Allocator>25// multimap(initializer_list<Key>, Allocator)26// -> multimap<Key, less<Key>, Allocator>;27//28// template<ranges::input_range R, class Compare = less<range-key-type<R>>,29// class Allocator = allocator<range-to-alloc-type<R>>>30// multimap(from_range_t, R&&, Compare = Compare(), Allocator = Allocator())31// -> multimap<range-key-type<R>, range-mapped-type<R>, Compare, Allocator>; // C++2332//33// template<ranges::input_range R, class Allocator>34// multimap(from_range_t, R&&, Allocator)35// -> multimap<range-key-type<R>, range-mapped-type<R>, less<range-key-type<R>>, Allocator>; // C++2336 37#include <algorithm> // std::equal38#include <array>39#include <cassert>40#include <climits> // INT_MAX41#include <functional>42#include <map>43#include <tuple>44#include <type_traits>45#include <utility>46#include <vector>47 48#include "deduction_guides_sfinae_checks.h"49#include "test_allocator.h"50 51using P = std::pair<int, long>;52using PC = std::pair<const int, long>;53 54int main(int, char**) {55 {56 const P arr[] = {{1, 1L}, {2, 2L}, {1, 1L}, {INT_MAX, 1L}, {3, 1L}};57 std::multimap m(std::begin(arr), std::end(arr));58 59 ASSERT_SAME_TYPE(decltype(m), std::multimap<int, long>);60 const PC expected_m[] = {{1, 1L}, {1, 1L}, {2, 2L}, {3, 1L}, {INT_MAX, 1L}};61 assert(std::equal(m.begin(), m.end(), std::begin(expected_m), std::end(expected_m)));62 }63 64 {65 const P arr[] = {{1, 1L}, {2, 2L}, {1, 1L}, {INT_MAX, 1L}, {3, 1L}};66 std::multimap m(std::begin(arr), std::end(arr), std::greater<int>());67 68 ASSERT_SAME_TYPE(decltype(m), std::multimap<int, long, std::greater<int>>);69 const PC expected_m[] = {{INT_MAX, 1L}, {3, 1L}, {2, 2L}, {1, 1L}, {1, 1L}};70 assert(std::equal(m.begin(), m.end(), std::begin(expected_m), std::end(expected_m)));71 }72 73 {74 const P arr[] = {{1, 1L}, {2, 2L}, {1, 1L}, {INT_MAX, 1L}, {3, 1L}};75 std::multimap m(std::begin(arr), std::end(arr), std::greater<int>(), test_allocator<PC>(0, 42));76 77 ASSERT_SAME_TYPE(decltype(m), std::multimap<int, long, std::greater<int>, test_allocator<PC>>);78 const PC expected_m[] = {{INT_MAX, 1L}, {3, 1L}, {2, 2L}, {1, 1L}, {1, 1L}};79 assert(std::equal(m.begin(), m.end(), std::begin(expected_m), std::end(expected_m)));80 assert(m.get_allocator().get_id() == 42);81 }82 83 {84 std::multimap<int, long> source;85 std::multimap m(source);86 ASSERT_SAME_TYPE(decltype(m), decltype(source));87 assert(m.size() == 0);88 }89 90 {91 std::multimap<int, long> source;92 std::multimap m{source}; // braces instead of parens93 ASSERT_SAME_TYPE(decltype(m), decltype(source));94 assert(m.size() == 0);95 }96 97 {98 std::multimap<int, long> source;99 std::multimap m(source, std::map<int, long>::allocator_type());100 ASSERT_SAME_TYPE(decltype(m), decltype(source));101 assert(m.size() == 0);102 }103 104 {105 std::multimap m{P{1, 1L}, P{2, 2L}, P{1, 1L}, P{INT_MAX, 1L}, P{3, 1L}};106 107 ASSERT_SAME_TYPE(decltype(m), std::multimap<int, long>);108 const PC expected_m[] = {{1, 1L}, {1, 1L}, {2, 2L}, {3, 1L}, {INT_MAX, 1L}};109 assert(std::equal(m.begin(), m.end(), std::begin(expected_m), std::end(expected_m)));110 }111 112 {113 std::multimap m({P{1, 1L}, P{2, 2L}, P{1, 1L}, P{INT_MAX, 1L}, P{3, 1L}}, std::greater<int>());114 115 ASSERT_SAME_TYPE(decltype(m), std::multimap<int, long, std::greater<int>>);116 const PC expected_m[] = {{INT_MAX, 1L}, {3, 1L}, {2, 2L}, {1, 1L}, {1, 1L}};117 assert(std::equal(m.begin(), m.end(), std::begin(expected_m), std::end(expected_m)));118 }119 120 {121 std::multimap m(122 {P{1, 1L}, P{2, 2L}, P{1, 1L}, P{INT_MAX, 1L}, P{3, 1L}}, std::greater<int>(), test_allocator<PC>(0, 43));123 124 ASSERT_SAME_TYPE(decltype(m), std::multimap<int, long, std::greater<int>, test_allocator<PC>>);125 const PC expected_m[] = {{INT_MAX, 1L}, {3, 1L}, {2, 2L}, {1, 1L}, {1, 1L}};126 assert(std::equal(m.begin(), m.end(), std::begin(expected_m), std::end(expected_m)));127 assert(m.get_allocator().get_id() == 43);128 }129 130 {131 const P arr[] = {{1, 1L}, {2, 2L}, {1, 1L}, {INT_MAX, 1L}, {3, 1L}};132 std::multimap m(std::begin(arr), std::end(arr), test_allocator<PC>(0, 44));133 134 ASSERT_SAME_TYPE(decltype(m), std::multimap<int, long, std::less<int>, test_allocator<PC>>);135 const PC expected_m[] = {{1, 1L}, {1, 1L}, {2, 2L}, {3, 1L}, {INT_MAX, 1L}};136 assert(std::equal(m.begin(), m.end(), std::begin(expected_m), std::end(expected_m)));137 assert(m.get_allocator().get_id() == 44);138 }139 140 {141 std::multimap m({P{1, 1L}, P{2, 2L}, P{1, 1L}, P{INT_MAX, 1L}, P{3, 1L}}, test_allocator<PC>(0, 45));142 143 ASSERT_SAME_TYPE(decltype(m), std::multimap<int, long, std::less<int>, test_allocator<PC>>);144 const PC expected_m[] = {{1, 1L}, {1, 1L}, {2, 2L}, {3, 1L}, {INT_MAX, 1L}};145 assert(std::equal(m.begin(), m.end(), std::begin(expected_m), std::end(expected_m)));146 assert(m.get_allocator().get_id() == 45);147 }148 149 {150 // Examples from LWG3025151 std::multimap m{std::pair{1, 1}, {2, 2}, {3, 3}};152 ASSERT_SAME_TYPE(decltype(m), std::multimap<int, int>);153 154 std::multimap m2{m.begin(), m.end()};155 ASSERT_SAME_TYPE(decltype(m2), std::multimap<int, int>);156 }157 158 {159 // Examples from LWG3531160 std::multimap m1{{std::pair{1, 2}, {3, 4}}, std::less<int>()};161 ASSERT_SAME_TYPE(decltype(m1), std::multimap<int, int>);162 163 using value_type = std::pair<const int, int>;164 std::multimap m2{{value_type{1, 2}, {3, 4}}, std::less<int>()};165 ASSERT_SAME_TYPE(decltype(m2), std::multimap<int, int>);166 }167 168#if TEST_STD_VER >= 23169 {170 using Range = std::array<P, 0>;171 using Comp = std::greater<int>;172 using DefaultComp = std::less<int>;173 using Alloc = test_allocator<PC>;174 175 { // (from_range, range)176 std::multimap c(std::from_range, Range());177 static_assert(std::is_same_v<decltype(c), std::multimap<int, long>>);178 }179 180 { // (from_range, range, comp)181 std::multimap c(std::from_range, Range(), Comp());182 static_assert(std::is_same_v<decltype(c), std::multimap<int, long, Comp>>);183 }184 185 { // (from_range, range, comp, alloc)186 std::multimap c(std::from_range, Range(), Comp(), Alloc());187 static_assert(std::is_same_v<decltype(c), std::multimap<int, long, Comp, Alloc>>);188 }189 190 { // (from_range, range, alloc)191 std::multimap c(std::from_range, Range(), Alloc());192 static_assert(std::is_same_v<decltype(c), std::multimap<int, long, DefaultComp, Alloc>>);193 }194 }195 {196 std::vector<std::pair<const int, float>> pair_vec = {{1, 1.1f}, {2, 2.2f}, {3, 3.3f}};197 std::multimap mm1(pair_vec.begin(), pair_vec.end());198 ASSERT_SAME_TYPE(decltype(mm1), std::multimap<int, float>);199 200 std::vector<std::tuple<int, double>> tuple_vec = {{10, 1.1}, {20, 2.2}, {30, 3.3}};201 std::multimap mm2(tuple_vec.begin(), tuple_vec.end());202 ASSERT_SAME_TYPE(decltype(mm2), std::multimap<int, double>);203 204 std::vector<std::array<long, 2>> array_vec = {{100L, 101L}, {200L, 201L}, {300L, 301L}};205 std::multimap mm3(array_vec.begin(), array_vec.end());206 ASSERT_SAME_TYPE(decltype(mm3), std::multimap<long, long>);207 208 // Check deduction with non-const key in input pair209 std::vector<std::pair<int, char>> non_const_key_pair_vec = {{5, 'a'}, {6, 'b'}};210 std::multimap mm4(non_const_key_pair_vec.begin(), non_const_key_pair_vec.end());211 ASSERT_SAME_TYPE(decltype(mm4), std::multimap<int, char>);212 }213#endif214 215 AssociativeContainerDeductionGuidesSfinaeAway<std::multimap, std::multimap<int, long>>();216 217 return 0;218}219