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
48 lines
1.4 KiB
C++
48 lines
1.4 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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// constexpr split_view() requires
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// default_initializable<V> && default_initializable<Pattern> = default;
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#include <cassert>
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#include <ranges>
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#include <type_traits>
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template <bool DefaultInitializable>
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struct View : std::ranges::view_base {
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int i = 42;
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constexpr explicit View()
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requires DefaultInitializable
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= default;
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int* begin() const;
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int* end() const;
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};
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// clang-format off
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static_assert( std::is_default_constructible_v<std::ranges::split_view<View<true >, View<true >>>);
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static_assert(!std::is_default_constructible_v<std::ranges::split_view<View<false>, View<true >>>);
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static_assert(!std::is_default_constructible_v<std::ranges::split_view<View<true >, View<false>>>);
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static_assert(!std::is_default_constructible_v<std::ranges::split_view<View<false>, View<false>>>);
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// clang-format on
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constexpr bool test() {
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{
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std::ranges::split_view<View<true>, View<true>> sv = {};
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assert(sv.base().i == 42);
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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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