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=== tests/cases/compiler/controlFlowForIndexSignatures.ts ===
type Foo = { bar: string };
>Foo : { bar: string; }
>bar : string
const boo: Foo = { bar: 'bar' };
>boo : Foo
>{ bar: 'bar' } : { bar: string; }
>bar : string
>'bar' : "bar"
function a(aboo1?: Foo) {
>a : (aboo1?: Foo) => void
>aboo1 : Foo | undefined
if (!aboo1) return;
>!aboo1 : boolean
>aboo1 : Foo | undefined
const aboo2: { [key: string]: typeof aboo1.bar } = boo;
>aboo2 : { [key: string]: string; }
>key : string
>aboo1.bar : string
>aboo1 : Foo
>bar : string
>boo : Foo
}
declare let b: Foo | undefined;
>b : Foo | undefined
if (b) {
>b : Foo | undefined
const bboo: { [key: string]: typeof b.bar } = boo;
>bboo : { [key: string]: string; }
>key : string
>b.bar : string
>b : Foo
>bar : string
>boo : Foo
}
b = boo;
>b = boo : Foo
>b : Foo | undefined
>boo : Foo
const bboo: { [key: string]: typeof b.bar } = boo;
>bboo : { [key: string]: string; }
>key : string
>b.bar : string
>b : Foo
>bar : string
>boo : Foo
declare let c: string | number;
>c : string | number
if (typeof c === 'string') {
>typeof c === 'string' : boolean
>typeof c : "string" | "number" | "bigint" | "boolean" | "symbol" | "undefined" | "object" | "function"
>c : string | number
>'string' : "string"
type C = { [key: string]: typeof c };
>C : { [key: string]: string; }
>key : string
>c : string
const boo1: C = { bar: 'works' };
>boo1 : { [key: string]: string; }
>{ bar: 'works' } : { bar: string; }
>bar : string
>'works' : "works"
const boo2: C = { bar: 1 }; // should error
>boo2 : { [key: string]: string; }
>{ bar: 1 } : { bar: number; }
>bar : number
>1 : 1
}
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