1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
// RUN: %target-swift-frontend -typecheck %s -debug-generic-signatures 2>&1 | %FileCheck %s
struct G<T> {}
// Three requirements where any two imply the third:
//
// a) T == G<U>
// b) T == G<Int>
// c) U == Int
// CHECK-LABEL: minimize_concrete_unification.(file).Pab@
// CHECK-NEXT: Requirement signature: <Self where Self.[Pab]T == G<Int>, Self.[Pab]U == Int>
protocol Pab {
associatedtype T where T == G<U>, T == G<Int>
associatedtype U
}
// CHECK-LABEL: minimize_concrete_unification.(file).Pac@
// CHECK-NEXT: Requirement signature: <Self where Self.[Pac]T == G<Int>, Self.[Pac]U == Int>
protocol Pac {
associatedtype T where T == G<U>
associatedtype U where U == Int
}
// CHECK-LABEL: minimize_concrete_unification.(file).Pbc@
// CHECK-NEXT: Requirement signature: <Self where Self.[Pbc]T == G<Int>, Self.[Pbc]U == Int>
protocol Pbc {
associatedtype T where T == G<Int>
associatedtype U where U == Int
}
// CHECK-LABEL: minimize_concrete_unification.(file).Pabc@
// CHECK-NEXT: Requirement signature: <Self where Self.[Pabc]T == G<Int>, Self.[Pabc]U == Int>
protocol Pabc {
associatedtype T where T == G<U>, T == G<Int>
associatedtype U where U == Int
}
//
// CHECK-LABEL: minimize_concrete_unification.(file).Pa@
// CHECK-NEXT: Requirement signature: <Self where Self.[Pa]T == G<Self.[Pa]U>>
protocol Pa {
associatedtype T where T == G<U>
associatedtype U
}
// CHECK-LABEL: minimize_concrete_unification.(file).PaQb@
// CHECK-NEXT: Requirement signature: <Self where Self.[PaQb]X : Pa, Self.[PaQb]X.[Pa]U == Int>
protocol PaQb {
associatedtype X : Pa where X.T == G<Int>
}
// CHECK-LABEL: minimize_concrete_unification.(file).PaQc@
// CHECK-NEXT: Requirement signature: <Self where Self.[PaQc]X : Pa, Self.[PaQc]X.[Pa]U == Int>
protocol PaQc {
associatedtype X : Pa where X.U == Int
}
//
// CHECK-LABEL: minimize_concrete_unification.(file).Pb@
// CHECK-NEXT: Requirement signature: <Self where Self.[Pb]T == G<Int>>
protocol Pb {
associatedtype T where T == G<Int>
associatedtype U
}
// CHECK-LABEL: minimize_concrete_unification.(file).PbQa@
// CHECK-NEXT: Requirement signature: <Self where Self.[PbQa]X : Pb, Self.[PbQa]X.[Pb]U == Int>
protocol PbQa {
associatedtype X : Pb where X.T == G<X.U>
}
// CHECK-LABEL: minimize_concrete_unification.(file).PbQc@
// CHECK-NEXT: Requirement signature: <Self where Self.[PbQc]X : Pb, Self.[PbQc]X.[Pb]U == Int>
protocol PbQc {
associatedtype X : Pb where X.U == Int
}
//
// CHECK-LABEL: minimize_concrete_unification.(file).Pc@
// CHECK-NEXT: Requirement signature: <Self where Self.[Pc]U == Int>
protocol Pc {
associatedtype T
associatedtype U where U == Int
}
// CHECK-LABEL: minimize_concrete_unification.(file).PcQa@
// CHECK-NEXT: Requirement signature: <Self where Self.[PcQa]X : Pc, Self.[PcQa]X.[Pc]T == G<Int>>
protocol PcQa {
associatedtype X : Pc where X.T == G<X.U>
}
// CHECK-LABEL: minimize_concrete_unification.(file).PcQb@
// CHECK-NEXT: Requirement signature: <Self where Self.[PcQb]X : Pc, Self.[PcQb]X.[Pc]T == G<Int>>
protocol PcQb {
associatedtype X : Pc where X.T == G<Int>
}
//
// CHECK-LABEL: minimize_concrete_unification.(file).Q1@
// CHECK-NEXT: Requirement signature: <Self where Self.[Q1]V : Pa, Self.[Q1]W == Self.[Q1]V.[Pa]U>
protocol Q1 {
associatedtype V where V : Pa, V.T == G<W>
associatedtype W
}
//
// CHECK-LABEL: minimize_concrete_unification.(file).P1@
// CHECK-NEXT: Requirement signature: <Self where Self.[P1]T == G<Self.[P1]U>>
protocol P1 {
associatedtype T
associatedtype U where T == G<U>
}
// CHECK-LABEL: minimize_concrete_unification.(file).P2@
// CHECK-NEXT: Requirement signature: <Self where Self.[P2]T == G<Int>>
protocol P2 {
associatedtype T where T == G<Int>
associatedtype U
}
// CHECK-LABEL: minimize_concrete_unification.(file).P@
// CHECK-NEXT: Requirement signature: <Self>
protocol P {
associatedtype T
associatedtype U
}
// CHECK-LABEL: minimize_concrete_unification.(file).R1@
// CHECK-NEXT: Requirement signature: <Self where Self.[R1]X : P, Self.[R1]X : Pa, Self.[R1]X.[P]U == Int>
protocol R1 {
// The GSB would drop 'X.T == Int' from the minimal signature.
associatedtype X where X : P, X.T == G<Int>, X : Pa
}
// CHECK-LABEL: minimize_concrete_unification.(file).R2@
// CHECK-NEXT: Requirement signature: <Self where Self.[R2]X : P, Self.[R2]X : Pb, Self.[R2]X.[P]U == Int>
protocol R2 {
// The GSB would drop 'X.T == Int' from the minimal signature.
associatedtype X where X : P, X.T == G<X.U>, X : Pb
}
// CHECK-LABEL: minimize_concrete_unification.(file).R3@
// CHECK-NEXT: Requirement signature: <Self where Self.[R3]X : Pa, Self.[R3]X : Pb>
protocol R3 {
// The GSB would include a redundant 'X.T == Int' in the minimal signature.
associatedtype X where X : Pa, X.T == G<Int>, X : Pb
}
|
