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-exception
6//
7//===----------------------------------------------------------------------===//
8// UNSUPPORTED: c++03, c++11, c++14, c++17
9
10// <map>
11
12// template <class Key, class T, class Compare, class Allocator, class Predicate>
13// typename map<Key, T, Compare, Allocator>::size_type
14// erase_if(map<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{
26 M ret;
27 for (int v : vals)
28 ret[static_cast<typename M::key_type>(v)] = static_cast<typename M::mapped_type>(v + 10);
29 return ret;
30}
31
32template <typename M, typename Pred>
33void test0(Init vals, Pred p, Init expected, std::size_t expected_erased_count) {
34 M s = make<M>(vals);
35 ASSERT_SAME_TYPE(typename M::size_type, decltype(std::erase_if(s, p)));
36 assert(expected_erased_count == std::erase_if(s, p));
37 assert(s == make<M>(expected));
38}
39
40template <typename S>
41void test()
42{
43 auto is1 = [](auto v) { return v.first == 1;};
44 auto is2 = [](auto v) { return v.first == 2;};
45 auto is3 = [](auto v) { return v.first == 3;};
46 auto is4 = [](auto v) { return v.first == 4;};
47 auto True = [](auto) { return true; };
48 auto False = [](auto) { return false; };
49
50 test0<S>({}, is1, {}, 0);
51
52 test0<S>({1}, is1, {}, 1);
53 test0<S>({1}, is2, {1}, 0);
54
55 test0<S>({1, 2}, is1, {2}, 1);
56 test0<S>({1, 2}, is2, {1}, 1);
57 test0<S>({1, 2}, is3, {1, 2}, 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, 2, 3}, True, {}, 3);
65 test0<S>({1, 2, 3}, False, {1, 2, 3}, 0);
66}
67
68int main(int, char**)
69{
70 test<std::map<int, int>>();
71 test<std::map<int, int, std::less<int>, min_allocator<std::pair<const int, int>>>> ();
72 test<std::map<int, int, std::less<int>, test_allocator<std::pair<const int, int>>>> ();
73
74 test<std::map<long, short>>();
75 test<std::map<short, double>>();
76
77 return 0;
78}
79

source code of libcxx/test/std/containers/associative/map/map.erasure/erase_if.pass.cpp