1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 // UNSUPPORTED: c++03, c++11, c++14, c++17
10 // UNSUPPORTED: libcpp-no-concepts
11 // UNSUPPORTED: libcpp-has-no-incomplete-ranges
12 
13 // template<class T>
14 //   single_view(T) -> single_view<T>;
15 
16 #include <ranges>
17 
18 #include <cassert>
19 #include <concepts>
20 
21 #include "test_iterators.h"
22 
23 struct Empty {};
24 
25 static_assert(std::same_as<
26   decltype(std::ranges::single_view(Empty())),
27   std::ranges::single_view<Empty>
28 >);
29 
30 static_assert(std::same_as<
31   decltype(std::ranges::single_view(std::declval<Empty&>())),
32   std::ranges::single_view<Empty>
33 >);
34 
35 static_assert(std::same_as<
36   decltype(std::ranges::single_view(std::declval<Empty&&>())),
37   std::ranges::single_view<Empty>
38 >);
39