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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
51 lines
1.1 KiB
C++
51 lines
1.1 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 _Tp>
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// inline constexpr empty_view<_Tp> empty{};
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#include <ranges>
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#include <cassert>
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#include "test_macros.h"
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template <class T>
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constexpr void testType() {
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ASSERT_SAME_TYPE(decltype(std::views::empty<T>), const std::ranges::empty_view<T>);
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ASSERT_SAME_TYPE(decltype((std::views::empty<T>)), const std::ranges::empty_view<T>&);
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auto v = std::views::empty<T>;
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assert(std::ranges::empty(v));
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}
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struct Empty {};
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struct BigType {
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char buff[8];
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};
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constexpr bool test() {
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testType<int>();
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testType<const int>();
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testType<int*>();
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testType<Empty>();
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testType<const Empty>();
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testType<BigType>();
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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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