87 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// UNSUPPORTED: c++03, c++11, c++14, c++179 10// <map>11 12// template <class Key, class T, class Compare, class Allocator, class Predicate>13// typename multimap<Key, T, Compare, Allocator>::size_type14// erase_if(multimap<Key, T, Compare, Allocator>& c, Predicate pred);15 16#include <map>17 18#include "test_macros.h"19#include "test_allocator.h"20#include "min_allocator.h"21 22using Init = std::initializer_list<int>;23template <typename M>24M make(Init vals) {25 M ret;26 for (int v : vals)27 ret.emplace(static_cast<typename M::key_type>(v), static_cast<typename M::mapped_type>(v + 10));28 return ret;29}30 31template <typename M, typename Pred>32void test0(Init vals, Pred p, Init expected, std::size_t expected_erased_count) {33 M s = make<M>(vals);34 ASSERT_SAME_TYPE(typename M::size_type, decltype(std::erase_if(s, p)));35 assert(expected_erased_count == std::erase_if(s, p));36 assert(s == make<M>(expected));37}38 39template <typename S>40void test() {41 auto is1 = [](auto v) { return v.first == 1; };42 auto is2 = [](auto v) { return v.first == 2; };43 auto is3 = [](auto v) { return v.first == 3; };44 auto is4 = [](auto v) { return v.first == 4; };45 auto True = [](auto) { return true; };46 auto False = [](auto) { return false; };47 48 test0<S>({}, is1, {}, 0);49 50 test0<S>({1}, is1, {}, 1);51 test0<S>({1}, is2, {1}, 0);52 53 test0<S>({1, 2}, is1, {2}, 1);54 test0<S>({1, 2}, is2, {1}, 1);55 test0<S>({1, 2}, is3, {1, 2}, 0);56 test0<S>({1, 1}, is1, {}, 2);57 test0<S>({1, 1}, is3, {1, 1}, 0);58 59 test0<S>({1, 2, 3}, is1, {2, 3}, 1);60 test0<S>({1, 2, 3}, is2, {1, 3}, 1);61 test0<S>({1, 2, 3}, is3, {1, 2}, 1);62 test0<S>({1, 2, 3}, is4, {1, 2, 3}, 0);63 64 test0<S>({1, 1, 1}, is1, {}, 3);65 test0<S>({1, 1, 1}, is2, {1, 1, 1}, 0);66 test0<S>({1, 1, 2}, is1, {2}, 2);67 test0<S>({1, 1, 2}, is2, {1, 1}, 1);68 test0<S>({1, 1, 2}, is3, {1, 1, 2}, 0);69 test0<S>({1, 2, 2}, is1, {2, 2}, 1);70 test0<S>({1, 2, 2}, is2, {1}, 2);71 test0<S>({1, 2, 2}, is3, {1, 2, 2}, 0);72 73 test0<S>({1, 2, 3}, True, {}, 3);74 test0<S>({1, 2, 3}, False, {1, 2, 3}, 0);75}76 77int main(int, char**) {78 test<std::multimap<int, int>>();79 test<std::multimap<int, int, std::less<int>, min_allocator<std::pair<const int, int>>>>();80 test<std::multimap<int, int, std::less<int>, test_allocator<std::pair<const int, int>>>>();81 82 test<std::multimap<long, short>>();83 test<std::multimap<short, double>>();84 85 return 0;86}87