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 | |
9 | // <algorithm> |
10 | |
11 | // template <class _Compare> struct __debug_less |
12 | |
13 | // Make sure __debug_less asserts when the comparator is not consistent. |
14 | |
15 | // REQUIRES: has-unix-headers, libcpp-hardening-mode=debug |
16 | // UNSUPPORTED: c++03 |
17 | |
18 | #include <algorithm> |
19 | #include <iterator> |
20 | |
21 | #include "check_assertion.h" |
22 | |
23 | template <int ID> |
24 | struct MyType { |
25 | int value; |
26 | explicit MyType(int xvalue = 0) : value(xvalue) {} |
27 | }; |
28 | |
29 | template <int ID1, int ID2> |
30 | bool operator<(MyType<ID1> const& LHS, MyType<ID2> const& RHS) { |
31 | return LHS.value < RHS.value; |
32 | } |
33 | |
34 | template <class ValueType> |
35 | struct BadComparator { |
36 | bool operator()(ValueType const&, ValueType const&) const { |
37 | return true; |
38 | } |
39 | }; |
40 | |
41 | int main(int, char**) { |
42 | typedef MyType<0> MT0; |
43 | MT0 one(1); |
44 | MT0 two(2); |
45 | |
46 | BadComparator<MT0> c; |
47 | std::__debug_less<BadComparator<MT0>> d(c); |
48 | |
49 | TEST_LIBCPP_ASSERT_FAILURE(d(one, two), "Comparator does not induce a strict weak ordering" ); |
50 | |
51 | return 0; |
52 | } |
53 | |