50 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 20static_assert( std::is_constructible_v<ForwardSubrange, ForwardBorrowedRange>); // Default case.21static_assert(!std::is_constructible_v<ForwardSubrange, ForwardRange>); // Not borrowed.22// Iter convertible to sentinel (pointer) type.23static_assert( std::is_constructible_v<ConvertibleForwardSubrange, ConvertibleForwardBorrowedRange>);24// Where neither iter or sentinel are pointers, but they are different.25static_assert( std::is_constructible_v<DifferentSentinelSubrange, ForwardBorrowedRangeDifferentSentinel>);26static_assert( std::is_constructible_v<DifferentSentinelWithSizeMemberSubrange, DifferentSentinelWithSizeMember>);27 28constexpr bool test() {29 ForwardSubrange a{ForwardBorrowedRange()};30 assert(base(a.begin()) == globalBuff);31 assert(base(a.end()) == globalBuff + 8);32 33 ConvertibleForwardSubrange b{ConvertibleForwardBorrowedRange()};34 assert(b.begin() == globalBuff);35 assert(b.end() == globalBuff + 8);36 37 DifferentSentinelSubrange c{ForwardBorrowedRangeDifferentSentinel()};38 assert(base(c.begin()) == globalBuff);39 assert(c.end().value == globalBuff + 8);40 41 return true;42}43 44int main(int, char**) {45 test();46 static_assert(test());47 48 return 0;49}50