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

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