b8cb1dc9ea
When we ship LLVM 16, <ranges> won't be considered experimental anymore. We might as well do this sooner rather than later. Differential Revision: https://reviews.llvm.org/D132151
56 lines
2.5 KiB
C++
56 lines
2.5 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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// template<class R>
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// concept forward_range;
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#include <ranges>
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#include "test_iterators.h"
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#include "test_range.h"
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template <template <class...> class I>
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constexpr bool check_forward_range() {
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constexpr bool result = std::ranges::forward_range<test_range<I> >;
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static_assert(std::ranges::forward_range<test_range<I> const> == result);
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static_assert(std::ranges::forward_range<test_non_const_common_range<I> > == result);
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static_assert(std::ranges::forward_range<test_non_const_range<I> > == result);
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static_assert(std::ranges::forward_range<test_common_range<I> > == result);
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static_assert(std::ranges::forward_range<test_common_range<I> const> == result);
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static_assert(!std::ranges::forward_range<test_non_const_common_range<I> const>);
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static_assert(!std::ranges::forward_range<test_non_const_range<I> const>);
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return result;
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}
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static_assert(!check_forward_range<cpp17_input_iterator>());
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static_assert(!check_forward_range<cpp20_input_iterator>());
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static_assert(check_forward_range<forward_iterator>());
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static_assert(check_forward_range<bidirectional_iterator>());
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static_assert(check_forward_range<random_access_iterator>());
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static_assert(check_forward_range<contiguous_iterator>());
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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::forward_range<Holder<Incomplete>*>);
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static_assert(!std::ranges::forward_range<Holder<Incomplete>*&>);
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static_assert(!std::ranges::forward_range<Holder<Incomplete>*&&>);
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static_assert(!std::ranges::forward_range<Holder<Incomplete>* const>);
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static_assert(!std::ranges::forward_range<Holder<Incomplete>* const&>);
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static_assert(!std::ranges::forward_range<Holder<Incomplete>* const&&>);
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static_assert( std::ranges::forward_range<Holder<Incomplete>*[10]>);
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static_assert( std::ranges::forward_range<Holder<Incomplete>*(&)[10]>);
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static_assert( std::ranges::forward_range<Holder<Incomplete>*(&&)[10]>);
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static_assert( std::ranges::forward_range<Holder<Incomplete>* const[10]>);
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static_assert( std::ranges::forward_range<Holder<Incomplete>* const(&)[10]>);
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static_assert( std::ranges::forward_range<Holder<Incomplete>* const(&&)[10]>);
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