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 #include "test_macros.h"
13 
14 TEST_CLANG_DIAGNOSTIC_IGNORED("-Wsign-compare")
15 TEST_GCC_DIAGNOSTIC_IGNORED("-Wsign-compare")
16 TEST_MSVC_DIAGNOSTIC_IGNORED(4018 4389) // various "signed/unsigned mismatch"
17 
18 // constexpr auto end() const;
19 // constexpr iterator end() const requires same_as<W, Bound>;
20 
21 #include <cassert>
22 #include <ranges>
23 #include <utility>
24 
25 #include "types.h"
26 
27 template<class T, class U>
28 constexpr void testType(U u) {
29   {
30     std::ranges::iota_view<T, U> io(T(0), u);
31     assert(std::ranges::next(io.begin(), 10) == io.end());
32   }
33   {
34     std::ranges::iota_view<T, U> io(T(10), u);
35     assert(io.begin() == io.end());
36     assert(io.begin() == std::move(io).end());
37   }
38   {
39     const std::ranges::iota_view<T, U> io(T(0), u);
40     assert(std::ranges::next(io.begin(), 10) == io.end());
41     assert(std::ranges::next(io.begin(), 10) == std::move(io).end());
42   }
43   {
44     const std::ranges::iota_view<T, U> io(T(10), u);
45     assert(io.begin() == io.end());
46   }
47 
48   {
49     std::ranges::iota_view<T> io(T(0), std::unreachable_sentinel);
50     assert(io.begin() != io.end());
51     assert(std::ranges::next(io.begin()) != io.end());
52     assert(std::ranges::next(io.begin(), 10) != io.end());
53   }
54   {
55     const std::ranges::iota_view<T> io(T(0), std::unreachable_sentinel);
56     assert(io.begin() != io.end());
57     assert(std::ranges::next(io.begin()) != io.end());
58     assert(std::ranges::next(io.begin(), 10) != io.end());
59   }
60 }
61 
62 constexpr bool test() {
63   testType<SomeInt>(SomeInt(10));
64   testType<SomeInt>(IntComparableWith(SomeInt(10)));
65   testType<signed long>(IntComparableWith<signed long>(10));
66   testType<unsigned long>(IntComparableWith<unsigned long>(10));
67   testType<int>(IntComparableWith<int>(10));
68   testType<int>(int(10));
69   testType<int>(unsigned(10));
70   testType<unsigned>(unsigned(10));
71   testType<unsigned>(int(10));
72   testType<unsigned>(IntComparableWith<unsigned>(10));
73   testType<short>(short(10));
74   testType<short>(IntComparableWith<short>(10));
75   testType<unsigned short>(IntComparableWith<unsigned short>(10));
76 
77   return true;
78 }
79 
80 int main(int, char**) {
81   test();
82   static_assert(test());
83 
84   return 0;
85 }
86