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-has-no-incomplete-ranges
11
12 // constexpr iterator(Parent& parent, OuterIter outer);
13
14 #include <cassert>
15 #include <ranges>
16
17 #include "../types.h"
18
19 using NonDefaultCtrIter = cpp20_input_iterator<int*>;
20 static_assert(!std::default_initializable<NonDefaultCtrIter>);
21
22 using NonDefaultCtrIterView = BufferView<NonDefaultCtrIter, sentinel_wrapper<NonDefaultCtrIter>>;
23 static_assert(std::ranges::input_range<NonDefaultCtrIterView>);
24
test()25 constexpr bool test() {
26 int buffer[4][4] = {{1, 2, 3, 4}, {5, 6, 7, 8}, {9, 10, 11, 12}, {13, 14, 15, 16}};
27 {
28 CopyableChild children[4] = {CopyableChild(buffer[0]), CopyableChild(buffer[1]), CopyableChild(buffer[2]),
29 CopyableChild(buffer[3])};
30 CopyableParent parent{children};
31 std::ranges::join_view jv(parent);
32 std::ranges::iterator_t<decltype(jv)> iter(jv, std::ranges::begin(parent));
33 assert(*iter == 1);
34 }
35
36 {
37 // LWG3569 Inner iterator not default_initializable
38 // With the current spec, the constructor under test invokes Inner iterator's default constructor
39 // even if it is not default constructible
40 // This test is checking that this constructor can be invoked with an inner range with non default
41 // constructible iterator
42 NonDefaultCtrIterView inners[] = {buffer[0], buffer[1]};
43 auto outer = std::views::all(inners);
44 std::ranges::join_view jv(outer);
45 std::ranges::iterator_t<decltype(jv)> iter(jv, std::ranges::begin(outer));
46 assert(*iter == 1);
47 }
48
49 return true;
50 }
51
main(int,char **)52 int main(int, char**) {
53 test();
54 static_assert(test());
55
56 return 0;
57 }
58