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-no-concepts
11 // UNSUPPORTED: gcc-10
12 // UNSUPPORTED: libcpp-has-no-incomplete-ranges
13 
14 // constexpr sentinel<false> end();
15 // constexpr iterator<false> end() requires common_range<V>;
16 // constexpr sentinel<true> end() const
17 //   requires range<const V> &&
18 //            regular_invocable<const F&, range_reference_t<const V>>;
19 // constexpr iterator<true> end() const
20 //   requires common_range<const V> &&
21 //            regular_invocable<const F&, range_reference_t<const V>>;
22 
23 #include <ranges>
24 
25 #include "test_macros.h"
26 #include "types.h"
27 
28 template<class T>
29 concept EndInvocable = requires(T t) { t.end(); };
30 
31 template<class T>
32 concept EndIsIter = requires(T t) { ++t.end(); };
33 
34 constexpr bool test() {
35   {
36     std::ranges::transform_view transformView(ContiguousView{}, Increment{});
37     assert(transformView.end().base() == globalBuff + 8);
38   }
39 
40   {
41     std::ranges::transform_view transformView(ForwardView{}, Increment{});
42     assert(transformView.end().base().base() == globalBuff + 8);
43   }
44 
45   {
46     std::ranges::transform_view transformView(InputView{}, Increment{});
47     assert(transformView.end().base() == globalBuff + 8);
48   }
49 
50   {
51     const std::ranges::transform_view transformView(ContiguousView{}, IncrementConst{});
52     assert(transformView.end().base() == globalBuff + 8);
53   }
54 
55   static_assert(!EndInvocable<const std::ranges::transform_view<ContiguousView, Increment>>);
56   static_assert( EndInvocable<      std::ranges::transform_view<ContiguousView, Increment>>);
57   static_assert( EndInvocable<const std::ranges::transform_view<ContiguousView, IncrementConst>>);
58   static_assert(!EndInvocable<const std::ranges::transform_view<InputView, Increment>>);
59   static_assert( EndInvocable<      std::ranges::transform_view<InputView, Increment>>);
60   static_assert( EndInvocable<const std::ranges::transform_view<InputView, IncrementConst>>);
61 
62   static_assert(!EndIsIter<const std::ranges::transform_view<InputView, IncrementConst>>);
63   static_assert(!EndIsIter<      std::ranges::transform_view<InputView, Increment>>);
64   static_assert( EndIsIter<const std::ranges::transform_view<ContiguousView, IncrementConst>>);
65   static_assert( EndIsIter<      std::ranges::transform_view<ContiguousView, Increment>>);
66 
67   return true;
68 }
69 
70 int main(int, char**) {
71   test();
72   static_assert(test());
73 
74   return 0;
75 }
76