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=== tests/cases/compiler/incrementOnNullAssertion.ts ===
interface Dictionary<T> {
[myFavouriteType: string]: T | undefined
>myFavouriteType : string
}
const x = 'bar'
>x : "bar"
>'bar' : "bar"
let foo: Dictionary<number> = {}
>foo : Dictionary<number>
>{} : {}
if (foo[x] === undefined) {
>foo[x] === undefined : boolean
>foo[x] : number | undefined
>foo : Dictionary<number>
>x : "bar"
>undefined : undefined
foo[x] = 1
>foo[x] = 1 : 1
>foo[x] : number | undefined
>foo : Dictionary<number>
>x : "bar"
>1 : 1
}
else {
let nu = foo[x]
>nu : number
>foo[x] : number
>foo : Dictionary<number>
>x : "bar"
let n = foo[x]
>n : number
>foo[x] : number
>foo : Dictionary<number>
>x : "bar"
foo[x]!++
>foo[x]!++ : number
>foo[x]! : number
>foo[x] : number
>foo : Dictionary<number>
>x : "bar"
}
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