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// <set>
11
12// template <class T, class Compare, class Allocator, class Predicate>
13// typename set<T, Compare, Allocator>::size_type
14// erase_if(set<T, Compare, Allocator>& c, Predicate pred);
15
16#include <set>
17
18#include "test_macros.h"
19#include "test_allocator.h"
20#include "min_allocator.h"
21
22template <class S, class Pred>
23void test0(S s, Pred p, S expected, std::size_t expected_erased_count) {
24 ASSERT_SAME_TYPE(typename S::size_type, decltype(std::erase_if(s, p)));
25 assert(expected_erased_count == std::erase_if(s, p));
26 assert(s == expected);
27}
28
29template <typename S>
30void test() {
31 auto is1 = [](auto v) { return v == 1; };
32 auto is2 = [](auto v) { return v == 2; };
33 auto is3 = [](auto v) { return v == 3; };
34 auto is4 = [](auto v) { return v == 4; };
35 auto True = [](auto) { return true; };
36 auto False = [](auto) { return false; };
37
38 test0(S(), is1, S(), 0);
39
40 test0(S({1}), is1, S(), 1);
41 test0(S({1}), is2, S({1}), 0);
42
43 test0(S({1, 2}), is1, S({2}), 1);
44 test0(S({1, 2}), is2, S({1}), 1);
45 test0(S({1, 2}), is3, S({1, 2}), 0);
46
47 test0(S({1, 2, 3}), is1, S({2, 3}), 1);
48 test0(S({1, 2, 3}), is2, S({1, 3}), 1);
49 test0(S({1, 2, 3}), is3, S({1, 2}), 1);
50 test0(S({1, 2, 3}), is4, S({1, 2, 3}), 0);
51
52 test0(S({1, 2, 3}), True, S(), 3);
53 test0(S({1, 2, 3}), False, S({1, 2, 3}), 0);
54}
55
56int main(int, char**) {
57 test<std::set<int>>();
58 test<std::set<int, std::less<int>, min_allocator<int>>>();
59 test<std::set<int, std::less<int>, test_allocator<int>>>();
60
61 test<std::set<long>>();
62 test<std::set<double>>();
63
64 return 0;
65}
66

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