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comparison gcc/testsuite/g++.dg/cpp2a/spaceship-synth1a.C @ 145:1830386684a0

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gcc-9.2.0
author anatofuz
date Thu, 13 Feb 2020 11:34:05 +0900
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131:84e7813d76e9 145:1830386684a0
1 // Test with all operators explicitly defaulted.
2 // { dg-do run { target c++2a } }
3
4 #include <compare>
5
6 template <class T>
7 struct D
8 {
9 T i;
10 auto operator<=>(const D& x) const = default;
11 bool operator==(const D& x) const = default;
12 bool operator!=(const D& x) const = default;
13 bool operator<(const D& x) const = default;
14 bool operator<=(const D& x) const = default;
15 bool operator>(const D& x) const = default;
16 bool operator>=(const D& x) const = default;
17 };
18
19 template <class T>
20 struct E
21 {
22 T i;
23 auto operator<=>(const E& x) const = default;
24 // auto operator==(const E& x) const = default;
25 // auto operator!=(const E& x) const = default;
26 // auto operator<(const E& x) const = default;
27 // auto operator<=(const E& x) const = default;
28 // auto operator>(const E& x) const = default;
29 // auto operator>=(const E& x) const = default;
30 };
31
32 template <class T>
33 struct F
34 {
35 T i;
36 constexpr auto operator<=>(T x) const { return i<=>x; }
37 constexpr bool operator== (T x) const { return i==x; }
38 };
39
40 #define assert(X) do { if (!(X)) __builtin_abort(); } while (0)
41
42 template <class T, class U>
43 constexpr bool check_eq (T d, U d2)
44 {
45 return is_eq (d <=> d2)
46 && is_eq (d2 <=> d)
47 && is_lteq (d <=> d2)
48 && is_lteq (d2 <=> d)
49 && !is_lt (d <=> d2)
50 && !is_lt (d2 <=> d)
51 && is_gteq (d <=> d2)
52 && is_gteq (d2 <=> d)
53 && !is_gt (d <=> d2)
54 && !is_gt (d2 <=> d)
55 && d == d2
56 && d2 == d
57 && !(d != d2)
58 && !(d2 != d)
59 && d >= d2
60 && d <= d2
61 && d2 >= d
62 && d2 <= d
63 && !(d < d2)
64 && !(d2 < d)
65 && !(d > d2)
66 && !(d2 > d);
67 }
68
69 template <class T, class U>
70 constexpr bool check_less (T d, U d2)
71 {
72 return !is_eq (d <=> d2)
73 && !is_eq (d2 <=> d)
74 && is_lteq (d <=> d2)
75 && !is_lteq (d2 <=> d)
76 && is_lt (d <=> d2)
77 && !is_lt (d2 <=> d)
78 && !is_gteq (d <=> d2)
79 && is_gteq (d2 <=> d)
80 && !is_gt (d <=> d2)
81 && is_gt (d2 <=> d)
82 && !(d == d2)
83 && !(d2 == d)
84 && (d != d2)
85 && (d2 != d)
86 && !(d >= d2)
87 && (d <= d2)
88 && (d2 >= d)
89 && !(d2 <= d)
90 && (d < d2)
91 && !(d2 < d)
92 && !(d > d2)
93 && (d2 > d);
94 }
95
96 int main()
97 {
98 constexpr D<int> d{42};
99 constexpr D<int> d2{24};
100
101 static_assert (check_eq (d, d));
102 static_assert (check_less (d2, d));
103
104 constexpr E<float> e { 3.14 };
105 constexpr E<float> ee { 2.72 };
106 static_assert (check_eq (e, e));
107 static_assert (check_less (ee, e));
108
109 constexpr F<char> f { 'b' };
110 static_assert (check_eq (f, 'b'));
111 static_assert (check_less (f, 'c'));
112 static_assert (check_less ('a', f));
113 }