llvm-project

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

22
template <class S, class Pred>
23
void 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

29
template <typename S>
30
void test()
31
{
32
    auto is1 = [](auto v) { return v == 1;};
33
    auto is2 = [](auto v) { return v == 2;};
34
    auto is3 = [](auto v) { return v == 3;};
35
    auto is4 = [](auto v) { return v == 4;};
36
    auto True  = [](auto) { return true; };
37
    auto False = [](auto) { return false; };
38

39
    test0(S(), is1, S(), 0);
40

41
    test0(S({1}), is1, S(), 1);
42
    test0(S({1}), is2, S({1}), 0);
43

44
    test0(S({1, 2}), is1, S({2}), 1);
45
    test0(S({1, 2}), is2, S({1}), 1);
46
    test0(S({1, 2}), is3, S({1, 2}), 0);
47

48
    test0(S({1, 2, 3}), is1, S({2, 3}), 1);
49
    test0(S({1, 2, 3}), is2, S({1, 3}), 1);
50
    test0(S({1, 2, 3}), is3, S({1, 2}), 1);
51
    test0(S({1, 2, 3}), is4, S({1, 2, 3}), 0);
52

53
    test0(S({1, 2, 3}), True, S(), 3);
54
    test0(S({1, 2, 3}), False, S({1, 2, 3}), 0);
55
}
56

57
int main(int, char**)
58
{
59
    test<std::set<int>>();
60
    test<std::set<int, std::less<int>, min_allocator<int>>> ();
61
    test<std::set<int, std::less<int>, test_allocator<int>>> ();
62

63
    test<std::set<long>>();
64
    test<std::set<double>>();
65

66
  return 0;
67
}
68