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//
11// template<class T, class Pred>
12// inline constexpr bool enable_borrowed_range<drop_while_view<T, Pred>> =
13// enable_borrowed_range<T>;
14
15#include <ranges>
16
17struct NonBorrowed : std::ranges::view_base {
18 int* begin();
19 int* end();
20};
21
22struct Borrowed : std::ranges::view_base {
23 int* begin();
24 int* end();
25};
26
27struct Pred {
28 bool operator()(int) const;
29};
30
31template <>
32inline constexpr bool std::ranges::enable_borrowed_range<Borrowed> = true;
33
34static_assert(!std::ranges::borrowed_range<std::ranges::drop_while_view<NonBorrowed, Pred>>);
35static_assert(std::ranges::borrowed_range<std::ranges::drop_while_view<Borrowed, Pred>>);
36

source code of libcxx/test/std/ranges/range.adaptors/range.drop.while/borrowed.compile.pass.cpp