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 R, class Pred>
12// take_while_view(R&&, Pred) -> take_while_view<views::all_t<R>, Pred>;
13
14#include <cassert>
15#include <ranges>
16#include <utility>
17
18#include "types.h"
19
20struct Container {
21 int* begin() const;
22 int* end() const;
23};
24
25struct View : std::ranges::view_base {
26 int* begin() const;
27 int* end() const;
28};
29
30struct Pred {
31 bool operator()(int i) const;
32};
33
34bool pred(int);
35
36static_assert(std::is_same_v<decltype(std::ranges::take_while_view(Container{}, Pred{})),
37 std::ranges::take_while_view<std::ranges::owning_view<Container>, Pred>>);
38
39static_assert(std::is_same_v<decltype(std::ranges::take_while_view(View{}, pred)), //
40 std::ranges::take_while_view<View, bool (*)(int)>>);
41
42static_assert(std::is_same_v<decltype(std::ranges::take_while_view(View{}, Pred{})), //
43 std::ranges::take_while_view<View, Pred>>);
44
45void testRef() {
46 Container c{};
47 Pred p{};
48 static_assert(std::is_same_v<decltype(std::ranges::take_while_view(c, p)),
49 std::ranges::take_while_view<std::ranges::ref_view<Container>, Pred>>);
50}
51

source code of libcxx/test/std/ranges/range.adaptors/range.take.while/ctad.compile.pass.cpp