=== tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType3_ES6.ts ===
interface I {
>I : I

    [s: string]: (x: string) => number;
>s : string
>x : string
}

var o: I = {
>o : I
>I : I
>{    [+"foo"](y) { return y.length; },    [+"bar"]: y => y.length} : { [x: string]: (y: string) => number; }

    [+"foo"](y) { return y.length; },
>+"foo" : number
>"foo" : string
>y : string
>y.length : number
>y : string
>length : number

    [+"bar"]: y => y.length
>+"bar" : number
>"bar" : string
>y => y.length : (y: string) => number
>y : string
>y.length : number
>y : string
>length : number
}