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 // UNSUPPORTED: c++03, c++11, c++14, c++17 10 // UNSUPPORTED: libcpp-no-concepts 11 // XFAIL: msvc && clang 12 13 // <functional> 14 15 // ranges::equal_to 16 17 #include <functional> 18 #include <type_traits> 19 #include <cassert> 20 21 #include "test_macros.h" 22 #include "compare_types.h" 23 #include "MoveOnly.h" 24 #include "pointer_comparison_test_helper.h" 25 26 struct NotEqualityComparable { 27 friend bool operator==(const NotEqualityComparable&, const NotEqualityComparable&); 28 friend bool operator!=(const NotEqualityComparable&, const NotEqualityComparable&) = delete; 29 }; 30 31 static_assert(!std::is_invocable_v<std::ranges::equal_to, NotEqualityComparable, NotEqualityComparable>); 32 static_assert(!std::is_invocable_v<std::ranges::equal_to, int, MoveOnly>); 33 static_assert(std::is_invocable_v<std::ranges::equal_to, explicit_operators, explicit_operators>); 34 35 static_assert(requires { typename std::ranges::equal_to::is_transparent; }); 36 37 constexpr bool test() { 38 auto fn = std::ranges::equal_to(); 39 40 assert(fn(MoveOnly(42), MoveOnly(42))); 41 42 ForwardingTestObject a; 43 ForwardingTestObject b; 44 assert(!fn(a, b)); 45 assert(fn(std::move(a), std::move(b))); 46 47 assert(!fn(1, 2)); 48 assert(!fn(2, 1)); 49 assert(fn(2, 2)); 50 51 assert(!fn(2, 1L)); 52 53 return true; 54 } 55 56 int main(int, char**) { 57 58 test(); 59 static_assert(test()); 60 61 // test total ordering of int* for equal_to<int*> and equal_to<void>. 62 do_pointer_comparison_test(std::ranges::equal_to()); 63 64 return 0; 65 } 66