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// constexpr iterator begin() const;
12
13#include <cassert>
14#include <ranges>
15#include <utility>
16
17#include "test_macros.h"
18#include "types.h"
19
20template<class T>
21constexpr void testType() {
22 {
23 std::ranges::iota_view<T> io(T(0));
24 assert(*io.begin() == T(0));
25 }
26 {
27 std::ranges::iota_view<T> io(T(10));
28 assert(*io.begin() == T(10));
29 assert(*std::move(io).begin() == T(10));
30 }
31 {
32 const std::ranges::iota_view<T> io(T(0));
33 assert(*io.begin() == T(0));
34 }
35 {
36 const std::ranges::iota_view<T> io(T(10));
37 assert(*io.begin() == T(10));
38 }
39}
40
41constexpr bool test() {
42 testType<SomeInt>();
43 testType<long long>();
44 testType<unsigned long long>();
45 testType<signed long>();
46 testType<unsigned long>();
47 testType<int>();
48 testType<unsigned>();
49 testType<short>();
50 testType<unsigned short>();
51
52 return true;
53}
54
55int main(int, char**) {
56 test();
57 static_assert(test());
58
59 return 0;
60}
61

source code of libcxx/test/std/ranges/range.factories/range.iota.view/begin.pass.cpp