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=== tests/cases/conformance/types/stringLiteral/stringLiteralCheckedInIf02.ts ===
type S = "a" | "b";
>S : S
type T = S[] | S;
>T : T
function isS(t: T): t is S {
>isS : (t: T) => t is S
>t : T
return t === "a" || t === "b";
>t === "a" || t === "b" : boolean
>t === "a" : boolean
>t : T
>"a" : "a"
>t === "b" : boolean
>t : "b" | S[]
>"b" : "b"
}
function f(foo: T) {
>f : (foo: T) => S
>foo : T
if (isS(foo)) {
>isS(foo) : boolean
>isS : (t: T) => t is S
>foo : T
return foo;
>foo : S
}
else {
return foo[0];
>foo[0] : S
>foo : S[]
>0 : 0
}
}
|
