1fe897dffd
Eliminate a bogus operator== overload. Also, check more intermediate steps in the logic we're checking here. Some of this simplification is possible only now that we've implemented more of <ranges>. Differential Revision: https://reviews.llvm.org/D116002
89 lines
3.2 KiB
C++
89 lines
3.2 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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// UNSUPPORTED: libcpp-no-concepts
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// UNSUPPORTED: libcpp-has-no-incomplete-ranges
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// constexpr sentinel<false> end();
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// constexpr iterator<false> end() requires common_range<V>;
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// constexpr sentinel<true> end() const
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// requires range<const V> &&
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// regular_invocable<const F&, range_reference_t<const V>>;
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// constexpr iterator<true> end() const
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// requires common_range<const V> &&
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// regular_invocable<const F&, range_reference_t<const V>>;
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#include <ranges>
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#include "test_macros.h"
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#include "types.h"
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template<class T>
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concept HasConstQualifiedEnd = requires(const T& t) { t.end(); };
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constexpr bool test() {
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{
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using TransformView = std::ranges::transform_view<ForwardView, PlusOneMutable>;
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static_assert(std::ranges::common_range<TransformView>);
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TransformView tv;
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auto end = tv.end();
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ASSERT_SAME_TYPE(decltype(end.base()), std::ranges::sentinel_t<ForwardView>);
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assert(base(end.base()) == globalBuff + 8);
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static_assert(!HasConstQualifiedEnd<TransformView>);
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}
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{
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using TransformView = std::ranges::transform_view<InputView, PlusOneMutable>;
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static_assert(!std::ranges::common_range<TransformView>);
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TransformView tv;
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auto end = tv.end();
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ASSERT_SAME_TYPE(decltype(end.base()), std::ranges::sentinel_t<InputView>);
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assert(base(base(end.base())) == globalBuff + 8);
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static_assert(!HasConstQualifiedEnd<TransformView>);
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}
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{
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using TransformView = std::ranges::transform_view<InputView, PlusOne>;
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static_assert(!std::ranges::common_range<TransformView>);
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TransformView tv;
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auto end = tv.end();
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ASSERT_SAME_TYPE(decltype(end.base()), std::ranges::sentinel_t<InputView>);
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assert(base(base(end.base())) == globalBuff + 8);
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auto cend = std::as_const(tv).end();
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ASSERT_SAME_TYPE(decltype(cend.base()), std::ranges::sentinel_t<const InputView>);
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assert(base(base(cend.base())) == globalBuff + 8);
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}
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{
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using TransformView = std::ranges::transform_view<MoveOnlyView, PlusOneMutable>;
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static_assert(std::ranges::common_range<TransformView>);
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TransformView tv;
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auto end = tv.end();
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ASSERT_SAME_TYPE(decltype(end.base()), std::ranges::sentinel_t<MoveOnlyView>);
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assert(end.base() == globalBuff + 8);
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static_assert(!HasConstQualifiedEnd<TransformView>);
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}
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{
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using TransformView = std::ranges::transform_view<MoveOnlyView, PlusOne>;
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static_assert(std::ranges::common_range<TransformView>);
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TransformView tv;
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auto end = tv.end();
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ASSERT_SAME_TYPE(decltype(end.base()), std::ranges::sentinel_t<MoveOnlyView>);
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assert(end.base() == globalBuff + 8);
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auto cend = std::as_const(tv).end();
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ASSERT_SAME_TYPE(decltype(cend.base()), std::ranges::sentinel_t<const MoveOnlyView>);
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assert(cend.base() == globalBuff + 8);
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}
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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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