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// <vector>
11
12// template <class T, class Allocator, class Predicate>
13// typename vector<T, Allocator>::size_type
14// erase_if(vector<T, Allocator>& c, Predicate pred);
15
16#include <vector>
17
18#include "test_macros.h"
19#include "test_allocator.h"
20#include "min_allocator.h"
21
22template <class S, class Pred>
23TEST_CONSTEXPR_CXX20 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
29template <typename S>
30TEST_CONSTEXPR_CXX20 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 test0(S({1, 1}), is1, S(), 2);
48 test0(S({1, 1}), is3, S({1, 1}), 0);
49
50 test0(S({1, 2, 3}), is1, S({2, 3}), 1);
51 test0(S({1, 2, 3}), is2, S({1, 3}), 1);
52 test0(S({1, 2, 3}), is3, S({1, 2}), 1);
53 test0(S({1, 2, 3}), is4, S({1, 2, 3}), 0);
54
55 test0(S({1, 1, 1}), is1, S(), 3);
56 test0(S({1, 1, 1}), is2, S({1, 1, 1}), 0);
57 test0(S({1, 1, 2}), is1, S({2}), 2);
58 test0(S({1, 1, 2}), is2, S({1, 1}), 1);
59 test0(S({1, 1, 2}), is3, S({1, 1, 2}), 0);
60 test0(S({1, 2, 2}), is1, S({2, 2}), 1);
61 test0(S({1, 2, 2}), is2, S({1}), 2);
62 test0(S({1, 2, 2}), is3, S({1, 2, 2}), 0);
63
64 test0(S({1, 2, 3}), True, S(), 3);
65 test0(S({1, 2, 3}), False, S({1, 2, 3}), 0);
66}
67
68TEST_CONSTEXPR_CXX20 bool tests()
69{
70 test<std::vector<int>>();
71 test<std::vector<int, min_allocator<int>>> ();
72 test<std::vector<int, test_allocator<int>>> ();
73 test<std::vector<int, safe_allocator<int>>>();
74
75 test<std::vector<long>>();
76 test<std::vector<double>>();
77
78 return true;
79}
80
81int main(int, char**)
82{
83 tests();
84#if TEST_STD_VER > 17
85 static_assert(tests());
86#endif
87 return 0;
88}
89

source code of libcxx/test/std/containers/sequences/vector/vector.erasure/erase_if.pass.cpp