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 // template<class In>
12 // concept std::weakly_incrementable;
13 
14 #include <iterator>
15 
16 #include <concepts>
17 #include <memory>
18 #include <optional>
19 
20 #include "../incrementable.h"
21 
22 static_assert(std::weakly_incrementable<int>);
23 static_assert(std::weakly_incrementable<int*>);
24 static_assert(std::weakly_incrementable<int**>);
25 static_assert(!std::weakly_incrementable<int[]>);
26 static_assert(!std::weakly_incrementable<int[10]>);
27 static_assert(!std::weakly_incrementable<double>);
28 static_assert(!std::weakly_incrementable<int&>);
29 static_assert(!std::weakly_incrementable<int()>);
30 static_assert(!std::weakly_incrementable<int (*)()>);
31 static_assert(!std::weakly_incrementable<int (&)()>);
32 static_assert(!std::weakly_incrementable<bool>);
33 
34 struct S {};
35 static_assert(!std::weakly_incrementable<int S::*>);
36 
37 #define CHECK_POINTER_TO_MEMBER_FUNCTIONS(qualifier)                                                                   \
38   static_assert(!std::weakly_incrementable<int (S::*)() qualifier>);                                                   \
39   static_assert(!std::weakly_incrementable<int (S::*)() qualifier noexcept>);                                          \
40   static_assert(!std::weakly_incrementable<int (S::*)() qualifier&>);                                                  \
41   static_assert(!std::weakly_incrementable<int (S::*)() qualifier & noexcept>);                                        \
42   static_assert(!std::weakly_incrementable<int (S::*)() qualifier&&>);                                                 \
43   static_assert(!std::weakly_incrementable < int (S::*)() qualifier&& noexcept >);
44 
45 #define NO_QUALIFIER
46 CHECK_POINTER_TO_MEMBER_FUNCTIONS(NO_QUALIFIER);
47 CHECK_POINTER_TO_MEMBER_FUNCTIONS(const);
48 CHECK_POINTER_TO_MEMBER_FUNCTIONS(volatile);
49 CHECK_POINTER_TO_MEMBER_FUNCTIONS(const volatile);
50 
51 static_assert(std::weakly_incrementable<postfix_increment_returns_void>);
52 static_assert(std::weakly_incrementable<postfix_increment_returns_copy>);
53 static_assert(std::weakly_incrementable<has_integral_minus>);
54 static_assert(std::weakly_incrementable<has_distinct_difference_type_and_minus>);
55 static_assert(!std::weakly_incrementable<missing_difference_type>);
56 static_assert(!std::weakly_incrementable<floating_difference_type>);
57 static_assert(!std::weakly_incrementable<non_const_minus>);
58 static_assert(!std::weakly_incrementable<non_integral_minus>);
59 static_assert(!std::weakly_incrementable<bad_difference_type_good_minus>);
60 static_assert(!std::weakly_incrementable<not_movable>);
61 static_assert(!std::weakly_incrementable<preinc_not_declared>);
62 static_assert(!std::weakly_incrementable<postinc_not_declared>);
63 static_assert(std::weakly_incrementable<not_default_initializable>);
64 static_assert(std::weakly_incrementable<incrementable_with_difference_type>);
65 static_assert(std::weakly_incrementable<incrementable_without_difference_type>);
66 static_assert(std::weakly_incrementable<difference_type_and_void_minus>);
67 static_assert(std::weakly_incrementable<noncopyable_with_difference_type>);
68 static_assert(std::weakly_incrementable<noncopyable_without_difference_type>);
69 static_assert(std::weakly_incrementable<noncopyable_with_difference_type_and_minus>);
70