a2b3ab8f77
- implement `std::ranges::split_view` (last c++20 view) - Work in process on testing iterator/sentinel, but since we are getting closer to the deadline, I'd like to send the review early Differential Revision: https://reviews.llvm.org/D142063
80 lines
1.9 KiB
C++
80 lines
1.9 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03, c++11, c++14, c++17
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// friend constexpr bool operator==(const iterator& x, const sentinel& y);
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#include <algorithm>
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#include <cassert>
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#include <concepts>
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#include <ranges>
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#include "test_iterators.h"
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template <class Iter>
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constexpr void testOne() {
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using Sent = sentinel_wrapper<Iter>;
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using Range = std::ranges::subrange<Iter, Sent>;
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using SplitView = std::ranges::split_view<Range, std::ranges::single_view<int>>;
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static_assert(!std::ranges::common_range<SplitView>);
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{
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// simple test
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{
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int buffer[] = {0, 1, 2, -1, 4, 5, 6};
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Range input(Iter{buffer}, Sent{Iter{buffer + 7}});
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SplitView sv(input, -1);
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auto b = sv.begin();
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auto e = sv.end();
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assert(!(b == e));
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assert(b != e);
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std::advance(b, 2);
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assert(b == e);
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assert(!(b != e));
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}
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// iterator at trailing empty position should not equal to end
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{
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int buffer[] = {0, 1, 2, -1};
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Range input(Iter{buffer}, Sent{Iter{buffer + 4}});
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SplitView sv(input, -1);
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auto b = sv.begin();
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auto e = sv.end();
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++b; // cur points to end but trailing_empty is true
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assert(b != e);
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assert(!(b == e));
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++b;
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assert(b == e);
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assert(!(b != e));
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}
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}
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}
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constexpr bool test() {
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testOne<forward_iterator<int*>>();
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testOne<bidirectional_iterator<int*>>();
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testOne<random_access_iterator<int*>>();
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testOne<contiguous_iterator<int*>>();
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testOne<int*>();
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return true;
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}
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int main(int, char**) {
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test();
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static_assert(test());
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return 0;
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}
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