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// single_view() requires default_initializable<T> = default;
12
13#include <ranges>
14#include <cassert>
15
16#include "test_macros.h"
17
18struct BigType { char buffer[64] = {10}; };
19
20template<bool DefaultCtorEnabled>
21struct IsDefaultConstructible {
22 IsDefaultConstructible() requires DefaultCtorEnabled = default;
23};
24
25constexpr bool test() {
26 static_assert( std::default_initializable<std::ranges::single_view<IsDefaultConstructible<true>>>);
27 static_assert(!std::default_initializable<std::ranges::single_view<IsDefaultConstructible<false>>>);
28
29 {
30 std::ranges::single_view<BigType> sv;
31 assert(sv.data()->buffer[0] == 10);
32 assert(sv.size() == 1);
33 }
34 {
35 const std::ranges::single_view<BigType> sv;
36 assert(sv.data()->buffer[0] == 10);
37 assert(sv.size() == 1);
38 }
39
40 return true;
41}
42
43int main(int, char**) {
44 test();
45 static_assert(test());
46
47 return 0;
48}
49

source code of libcxx/test/std/ranges/range.factories/range.single.view/ctor.default.pass.cpp