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 // concept borrowed_range;
15 
16 #include <ranges>
17 
18 template <std::ranges::range R>
19 consteval bool check_subsumption() {
20   return false;
21 }
22 
23 template <std::ranges::borrowed_range R>
24 consteval bool check_subsumption() {
25   return true;
26 }
27 
28 static_assert(check_subsumption<int (&)[8]>());
29