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
|
=== tests/cases/compiler/exhaustiveSwitchCheckCircularity.ts ===
// Repro from #47539
declare function isNever(n: never): boolean;
>isNever : Symbol(isNever, Decl(exhaustiveSwitchCheckCircularity.ts, 0, 0))
>n : Symbol(n, Decl(exhaustiveSwitchCheckCircularity.ts, 2, 25))
function f() {
>f : Symbol(f, Decl(exhaustiveSwitchCheckCircularity.ts, 2, 44))
let foo: "aaa" | "bbb" = "aaa";
>foo : Symbol(foo, Decl(exhaustiveSwitchCheckCircularity.ts, 5, 7))
while (true) {
switch (foo) {
>foo : Symbol(foo, Decl(exhaustiveSwitchCheckCircularity.ts, 5, 7))
case "aaa":
}
if (foo === "aaa") {
>foo : Symbol(foo, Decl(exhaustiveSwitchCheckCircularity.ts, 5, 7))
foo = "bbb";
>foo : Symbol(foo, Decl(exhaustiveSwitchCheckCircularity.ts, 5, 7))
}
else if (isNever(foo)) { // Error expected
>isNever : Symbol(isNever, Decl(exhaustiveSwitchCheckCircularity.ts, 0, 0))
>foo : Symbol(foo, Decl(exhaustiveSwitchCheckCircularity.ts, 5, 7))
break;
}
}
}
// Repro from #51688
declare function functionB(key: string): string;
>functionB : Symbol(functionB, Decl(exhaustiveSwitchCheckCircularity.ts, 17, 1))
>key : Symbol(key, Decl(exhaustiveSwitchCheckCircularity.ts, 21, 27))
function functionC(): void {
>functionC : Symbol(functionC, Decl(exhaustiveSwitchCheckCircularity.ts, 21, 48))
let unionVal: "A" | "B" = "A";
>unionVal : Symbol(unionVal, Decl(exhaustiveSwitchCheckCircularity.ts, 24, 7))
while (true) {
let key: string;
>key : Symbol(key, Decl(exhaustiveSwitchCheckCircularity.ts, 26, 11))
switch (unionVal) {
>unionVal : Symbol(unionVal, Decl(exhaustiveSwitchCheckCircularity.ts, 24, 7))
case "A": {
key = "AA";
>key : Symbol(key, Decl(exhaustiveSwitchCheckCircularity.ts, 26, 11))
break;
}
}
functionB(key);
>functionB : Symbol(functionB, Decl(exhaustiveSwitchCheckCircularity.ts, 17, 1))
>key : Symbol(key, Decl(exhaustiveSwitchCheckCircularity.ts, 26, 11))
}
}
|
