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, c++20 9 10 // <mdspan> 11 // 12 // template<class OtherIndexType, size_t... OtherExtents> 13 // friend constexpr bool operator==(const extents& lhs, 14 // const extents<OtherIndexType, OtherExtents...>& rhs) noexcept; 15 // 16 // Returns: true if lhs.rank() equals rhs.rank() and 17 // if lhs.extent(r) equals rhs.extent(r) for every rank index r of rhs, otherwise false. 18 // 19 20 #include <cassert> 21 #include <cstddef> 22 #include <mdspan> 23 #include <span> // dynamic_extent 24 25 #include "test_macros.h" 26 27 template <class To, class From> 28 constexpr void test_comparison(bool equal, To dest, From src) { 29 ASSERT_NOEXCEPT(dest == src); 30 assert((dest == src) == equal); 31 assert((dest != src) == !equal); 32 } 33 34 template <class T1, class T2> 35 constexpr void test_comparison_different_rank() { 36 constexpr size_t D = std::dynamic_extent; 37 38 test_comparison(false, std::extents<T1>(), std::extents<T2, D>(1)); 39 test_comparison(false, std::extents<T1>(), std::extents<T2, 1>()); 40 41 test_comparison(false, std::extents<T1, D>(1), std::extents<T2>()); 42 test_comparison(false, std::extents<T1, 1>(), std::extents<T2>()); 43 44 test_comparison(false, std::extents<T1, D>(5), std::extents<T2, D, D>(5, 5)); 45 test_comparison(false, std::extents<T1, 5>(), std::extents<T2, 5, D>(5)); 46 test_comparison(false, std::extents<T1, 5>(), std::extents<T2, 5, 1>()); 47 48 test_comparison(false, std::extents<T1, D, D>(5, 5), std::extents<T2, D>(5)); 49 test_comparison(false, std::extents<T1, 5, D>(5), std::extents<T2, D>(5)); 50 test_comparison(false, std::extents<T1, 5, 5>(), std::extents<T2, 5>()); 51 } 52 53 template <class T1, class T2> 54 constexpr void test_comparison_same_rank() { 55 constexpr size_t D = std::dynamic_extent; 56 57 test_comparison(true, std::extents<T1>(), std::extents<T2>()); 58 59 test_comparison(true, std::extents<T1, D>(5), std::extents<T2, D>(5)); 60 test_comparison(true, std::extents<T1, 5>(), std::extents<T2, D>(5)); 61 test_comparison(true, std::extents<T1, D>(5), std::extents<T2, 5>()); 62 test_comparison(true, std::extents<T1, 5>(), std::extents< T2, 5>()); 63 test_comparison(false, std::extents<T1, D>(5), std::extents<T2, D>(7)); 64 test_comparison(false, std::extents<T1, 5>(), std::extents<T2, D>(7)); 65 test_comparison(false, std::extents<T1, D>(5), std::extents<T2, 7>()); 66 test_comparison(false, std::extents<T1, 5>(), std::extents<T2, 7>()); 67 68 test_comparison(true, std::extents<T1, D, D, D, D, D>(5, 6, 7, 8, 9), std::extents<T2, D, D, D, D, D>(5, 6, 7, 8, 9)); 69 test_comparison(true, std::extents<T1, D, 6, D, 8, D>(5, 7, 9), std::extents<T2, 5, D, D, 8, 9>(6, 7)); 70 test_comparison(true, std::extents<T1, 5, 6, 7, 8, 9>(5, 6, 7, 8, 9), std::extents<T2, 5, 6, 7, 8, 9>()); 71 test_comparison( 72 false, std::extents<T1, D, D, D, D, D>(5, 6, 7, 8, 9), std::extents<T2, D, D, D, D, D>(5, 6, 3, 8, 9)); 73 test_comparison(false, std::extents<T1, D, 6, D, 8, D>(5, 7, 9), std::extents<T2, 5, D, D, 3, 9>(6, 7)); 74 test_comparison(false, std::extents<T1, 5, 6, 7, 8, 9>(5, 6, 7, 8, 9), std::extents<T2, 5, 6, 7, 3, 9>()); 75 } 76 77 template <class T1, class T2> 78 constexpr void test_comparison() { 79 test_comparison_same_rank<T1, T2>(); 80 test_comparison_different_rank<T1, T2>(); 81 } 82 83 constexpr bool test() { 84 test_comparison<int, int>(); 85 test_comparison<int, size_t>(); 86 test_comparison<size_t, int>(); 87 test_comparison<size_t, long>(); 88 return true; 89 } 90 91 int main(int, char**) { 92 test(); 93 static_assert(test()); 94 return 0; 95 } 96