b40a3d73dc
Reviewed By: ldionne, var-const, #libc Spies: libcxx-commits Differential Revision: https://reviews.llvm.org/D137637
56 lines
1.7 KiB
C++
56 lines
1.7 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, c++20
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// std::ranges::as_rvalue_view::as_rvalue_view(...)
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#include <cassert>
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#include <ranges>
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#include <vector>
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struct DefaultConstructibleView : std::ranges::view_base {
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int* begin() const;
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int* end() const;
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int i_ = 23;
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};
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struct NonDefaultConstructibleView : std::ranges::view_base {
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NonDefaultConstructibleView(int i) : i_(i) {}
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int* begin() const;
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int* end() const;
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int i_ = 23;
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};
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static_assert(!std::is_constructible_v<std::ranges::as_rvalue_view<NonDefaultConstructibleView>>);
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static_assert(std::is_constructible_v<std::ranges::as_rvalue_view<NonDefaultConstructibleView>, int>);
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static_assert(std::is_nothrow_constructible_v<std::ranges::as_rvalue_view<DefaultConstructibleView>>);
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template <class T, class... Args>
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concept IsImplicitlyConstructible = requires(T val, Args... args) { val = {std::forward<Args>(args)...}; };
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static_assert(IsImplicitlyConstructible<std::ranges::as_rvalue_view<DefaultConstructibleView>>);
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static_assert(!IsImplicitlyConstructible<std::ranges::as_rvalue_view<NonDefaultConstructibleView>, int>);
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constexpr bool test() {
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std::ranges::as_rvalue_view<DefaultConstructibleView> view = {};
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assert(view.base().i_ == 23);
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return true;
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}
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int main(int, char**) {
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static_assert(test());
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test();
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return 0;
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}
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