67 lines
2.7 KiB
C++
67 lines
2.7 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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// template<class R, class T>
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// concept output_range;
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#include <ranges>
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#include <iterator>
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#include "test_iterators.h"
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#include "test_range.h"
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struct T { };
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// Satisfied when it's a range and has the right iterator
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struct GoodRange {
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cpp17_output_iterator<T*> begin();
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sentinel end();
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};
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static_assert(std::ranges::range<GoodRange>);
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static_assert(std::output_iterator<std::ranges::iterator_t<GoodRange>, T>);
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static_assert(std::ranges::output_range<GoodRange, T>);
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// Not satisfied when it's not a range
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struct NotRange {
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cpp17_output_iterator<T*> begin();
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};
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static_assert(!std::ranges::range<NotRange>);
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static_assert( std::output_iterator<std::ranges::iterator_t<NotRange>, T>);
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static_assert(!std::ranges::output_range<NotRange, T>);
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// Not satisfied when the iterator is not an output_iterator
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struct RangeWithBadIterator {
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cpp17_input_iterator<T const*> begin();
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sentinel end();
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};
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static_assert( std::ranges::range<RangeWithBadIterator>);
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static_assert(!std::output_iterator<std::ranges::iterator_t<RangeWithBadIterator>, T>);
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static_assert(!std::ranges::output_range<RangeWithBadIterator, T>);
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// Test ADL-proofing.
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struct Incomplete;
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template<class T> struct Holder { T t; };
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static_assert(!std::ranges::output_range<Holder<Incomplete>*, Holder<Incomplete>*>);
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static_assert(!std::ranges::output_range<Holder<Incomplete>*&, Holder<Incomplete>*>);
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static_assert(!std::ranges::output_range<Holder<Incomplete>*&&, Holder<Incomplete>*>);
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static_assert(!std::ranges::output_range<Holder<Incomplete>* const, Holder<Incomplete>*>);
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static_assert(!std::ranges::output_range<Holder<Incomplete>* const&, Holder<Incomplete>*>);
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static_assert(!std::ranges::output_range<Holder<Incomplete>* const&&, Holder<Incomplete>*>);
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static_assert( std::ranges::output_range<Holder<Incomplete>*[10], Holder<Incomplete>*>);
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static_assert( std::ranges::output_range<Holder<Incomplete>*(&)[10], Holder<Incomplete>*>);
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static_assert( std::ranges::output_range<Holder<Incomplete>*(&&)[10], Holder<Incomplete>*>);
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static_assert(!std::ranges::output_range<Holder<Incomplete>* const[10], Holder<Incomplete>*>);
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static_assert(!std::ranges::output_range<Holder<Incomplete>* const(&)[10], Holder<Incomplete>*>);
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static_assert(!std::ranges::output_range<Holder<Incomplete>* const(&&)[10], Holder<Incomplete>*>);
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