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
|
//// [reachabilityChecks4.ts]
function foo(x, y) {
switch (x) {
case 1:
case 2:
return 1;
case 3:
if (y) {
return 2;
}
case 4:
return 3;
}
}
declare function noop(): void;
declare function fail(): never;
function f1(x: 0 | 1 | 2) {
switch (x) {
case 0:
fail();
case 1:
noop();
case 2:
return;
}
}
// Repro from #34021
type Behavior = 'SLIDE' | 'SLIDE_OUT'
type Direction = 'LEFT' | 'RIGHT' | 'TOP' | 'BOTTOM'
interface Transition {
behavior: Behavior
direction: Direction
}
function f2(transition: Transition): any {
switch (transition.behavior) {
case 'SLIDE':
switch (transition.direction) {
case 'LEFT':
return []
case 'RIGHT':
return []
case 'TOP':
return []
case 'BOTTOM':
return []
}
case 'SLIDE_OUT':
switch (transition.direction) {
case 'LEFT':
return []
case 'RIGHT':
return []
case 'TOP':
return []
case 'BOTTOM':
return []
}
}
}
//// [reachabilityChecks4.js]
function foo(x, y) {
switch (x) {
case 1:
case 2:
return 1;
case 3:
if (y) {
return 2;
}
case 4:
return 3;
}
}
function f1(x) {
switch (x) {
case 0:
fail();
case 1:
noop();
case 2:
return;
}
}
function f2(transition) {
switch (transition.behavior) {
case 'SLIDE':
switch (transition.direction) {
case 'LEFT':
return [];
case 'RIGHT':
return [];
case 'TOP':
return [];
case 'BOTTOM':
return [];
}
case 'SLIDE_OUT':
switch (transition.direction) {
case 'LEFT':
return [];
case 'RIGHT':
return [];
case 'TOP':
return [];
case 'BOTTOM':
return [];
}
}
}
|
