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=== tests/cases/compiler/singletonLabeledTuple.ts ===
type AliasOptional = [p?: number]
>AliasOptional : [p?: number]
// literal type vs type alias
type Literal = [p?: number] extends [unknown] ? true : false // Expect `Literal` to be `false`
>Literal : false
>true : true
>false : false
type Alias = AliasOptional extends [unknown] ? true : false // Expect `Alias` to be `false`
>Alias : false
>true : true
>false : false
// labeled tuple vs normal tuple
type Labeled = [p?: number] extends [unknown] ? true : false // Expect `Labeled` to be `false`
>Labeled : false
>true : true
>false : false
type Normal = [number?] extends [unknown] ? true : false // Expect `Normal` to be `false`
>Normal : false
>true : true
>false : false
type AliasRest = [...p: number[]];
>AliasRest : number[]
type LiteralRest = [...p: number[]] extends [unknown] ? true : false; // Expect `LiteralRest` to be `false`
>LiteralRest : false
>true : true
>false : false
type AliasedRest = AliasRest extends [unknown] ? true : false; // Expect `AliasedRest` to be `false`
>AliasedRest : false
>true : true
>false : false
type NormalRest = [...number[]] extends [unknown] ? true : false; // Expect `NormalRest` to be `false`
>NormalRest : false
>true : true
>false : false
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