e53c461bf3
Note that this class was called just `split_view` in the original One Ranges Proposal and was renamed to `lazy_split_view` by [P2210](https://wg21.link/p2210). Co-authored-by: zoecarver <z.zoelec2@gmail.com> Differential Revision: https://reviews.llvm.org/D107500
60 lines
2.0 KiB
C++
60 lines
2.0 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-has-no-incomplete-ranges
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// lazy_split_view() requires default_initializable<V> && default_initializable<P> = default;
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#include <ranges>
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#include <cassert>
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#include "types.h"
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struct ThrowingDefaultCtorForwardView : std::ranges::view_base {
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ThrowingDefaultCtorForwardView() noexcept(false);
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forward_iterator<int*> begin() const;
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forward_iterator<int*> end() const;
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};
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struct NoDefaultCtorForwardView : std::ranges::view_base {
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NoDefaultCtorForwardView() = delete;
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forward_iterator<int*> begin() const;
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forward_iterator<int*> end() const;
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};
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static_assert( std::is_default_constructible_v<std::ranges::lazy_split_view<ForwardView, ForwardView>>);
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static_assert(!std::is_default_constructible_v<std::ranges::lazy_split_view<NoDefaultCtorForwardView, ForwardView>>);
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static_assert(!std::is_default_constructible_v<std::ranges::lazy_split_view<ForwardView, NoDefaultCtorForwardView>>);
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static_assert( std::is_nothrow_default_constructible_v<std::ranges::lazy_split_view<ForwardView, ForwardView>>);
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static_assert(!std::is_nothrow_default_constructible_v<ThrowingDefaultCtorForwardView>);
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static_assert(!std::is_nothrow_default_constructible_v<
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std::ranges::lazy_split_view<ThrowingDefaultCtorForwardView, ForwardView>>);
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constexpr bool test() {
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{
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std::ranges::lazy_split_view<CopyableView, ForwardView> v;
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assert(v.base() == CopyableView());
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}
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{
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std::ranges::lazy_split_view<CopyableView, ForwardView> v = {};
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assert(v.base() == CopyableView());
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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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