52 lines · cpp
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-exception6//7//===----------------------------------------------------------------------===//8 9// UNSUPPORTED: c++03, c++11, c++14, c++1710 11// class std::ranges::subrange;12 13#include <ranges>14 15#include "types.h"16#include <cassert>17#include "test_macros.h"18#include "test_iterators.h"19 20// convertible-to-non-slicing cases:21// 1. Not convertible (fail)22// 2. Only one is a pointer (succeed)23// 3. Both are not pointers (succeed)24// 4. Pointer elements are different types (fail)25// 5. Pointer elements are same type (succeed)26 27// !StoreSize ctor.28static_assert( std::is_constructible_v<ForwardSubrange, ForwardIter, ForwardIter>); // Default case.29static_assert(!std::is_constructible_v<ForwardSubrange, Empty, ForwardIter>); // 1.30static_assert( std::is_constructible_v<ConvertibleForwardSubrange, ConvertibleForwardIter, int*>); // 2.31static_assert( std::is_constructible_v<ForwardSubrange, ForwardIter, ForwardIter>); // 3. (Same as default case.)32// 4. and 5. must be sized.33 34constexpr bool test() {35 ForwardSubrange a(ForwardIter(globalBuff), ForwardIter(globalBuff + 8));36 assert(base(a.begin()) == globalBuff);37 assert(base(a.end()) == globalBuff + 8);38 39 ConvertibleForwardSubrange b(ConvertibleForwardIter(globalBuff), globalBuff + 8);40 assert(b.begin() == globalBuff);41 assert(b.end() == globalBuff + 8);42 43 return true;44}45 46int main(int, char**) {47 test();48 static_assert(test());49 50 return 0;51}52