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
|
=== tests/cases/compiler/reachabilityChecks4.ts ===
function foo(x, y) {
>foo : Symbol(foo, Decl(reachabilityChecks4.ts, 0, 0))
>x : Symbol(x, Decl(reachabilityChecks4.ts, 0, 13))
>y : Symbol(y, Decl(reachabilityChecks4.ts, 0, 15))
switch (x) {
>x : Symbol(x, Decl(reachabilityChecks4.ts, 0, 13))
case 1:
case 2:
return 1;
case 3:
if (y) {
>y : Symbol(y, Decl(reachabilityChecks4.ts, 0, 15))
return 2;
}
case 4:
return 3;
}
}
declare function noop(): void;
>noop : Symbol(noop, Decl(reachabilityChecks4.ts, 12, 1))
declare function fail(): never;
>fail : Symbol(fail, Decl(reachabilityChecks4.ts, 14, 30))
function f1(x: 0 | 1 | 2) {
>f1 : Symbol(f1, Decl(reachabilityChecks4.ts, 15, 31))
>x : Symbol(x, Decl(reachabilityChecks4.ts, 17, 12))
switch (x) {
>x : Symbol(x, Decl(reachabilityChecks4.ts, 17, 12))
case 0:
fail();
>fail : Symbol(fail, Decl(reachabilityChecks4.ts, 14, 30))
case 1:
noop();
>noop : Symbol(noop, Decl(reachabilityChecks4.ts, 12, 1))
case 2:
return;
}
}
// Repro from #34021
type Behavior = 'SLIDE' | 'SLIDE_OUT'
>Behavior : Symbol(Behavior, Decl(reachabilityChecks4.ts, 26, 1))
type Direction = 'LEFT' | 'RIGHT' | 'TOP' | 'BOTTOM'
>Direction : Symbol(Direction, Decl(reachabilityChecks4.ts, 30, 37))
interface Transition {
>Transition : Symbol(Transition, Decl(reachabilityChecks4.ts, 31, 52))
behavior: Behavior
>behavior : Symbol(Transition.behavior, Decl(reachabilityChecks4.ts, 33, 22))
>Behavior : Symbol(Behavior, Decl(reachabilityChecks4.ts, 26, 1))
direction: Direction
>direction : Symbol(Transition.direction, Decl(reachabilityChecks4.ts, 34, 20))
>Direction : Symbol(Direction, Decl(reachabilityChecks4.ts, 30, 37))
}
function f2(transition: Transition): any {
>f2 : Symbol(f2, Decl(reachabilityChecks4.ts, 36, 1))
>transition : Symbol(transition, Decl(reachabilityChecks4.ts, 38, 12))
>Transition : Symbol(Transition, Decl(reachabilityChecks4.ts, 31, 52))
switch (transition.behavior) {
>transition.behavior : Symbol(Transition.behavior, Decl(reachabilityChecks4.ts, 33, 22))
>transition : Symbol(transition, Decl(reachabilityChecks4.ts, 38, 12))
>behavior : Symbol(Transition.behavior, Decl(reachabilityChecks4.ts, 33, 22))
case 'SLIDE':
switch (transition.direction) {
>transition.direction : Symbol(Transition.direction, Decl(reachabilityChecks4.ts, 34, 20))
>transition : Symbol(transition, Decl(reachabilityChecks4.ts, 38, 12))
>direction : Symbol(Transition.direction, Decl(reachabilityChecks4.ts, 34, 20))
case 'LEFT':
return []
case 'RIGHT':
return []
case 'TOP':
return []
case 'BOTTOM':
return []
}
case 'SLIDE_OUT':
switch (transition.direction) {
>transition.direction : Symbol(Transition.direction, Decl(reachabilityChecks4.ts, 34, 20))
>transition : Symbol(transition, Decl(reachabilityChecks4.ts, 38, 12))
>direction : Symbol(Transition.direction, Decl(reachabilityChecks4.ts, 34, 20))
case 'LEFT':
return []
case 'RIGHT':
return []
case 'TOP':
return []
case 'BOTTOM':
return []
}
}
}
|
