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=== tests/cases/compiler/typeInferenceLiteralUnion.ts ===
// Repro from #10901
/**
* Administrivia: JavaScript primitive types and Date
*/
export type Primitive = number | string | boolean | Date;
>Primitive : Primitive
>Date : Date
/**
* Administrivia: anything with a valueOf(): number method is comparable, so we allow it in numeric operations
*/
interface Numeric {
>Numeric : Numeric
valueOf(): number;
>valueOf : () => number
}
// Not very useful, but meets Numeric
class NumCoercible {
>NumCoercible : NumCoercible
public a: number;
>a : number
constructor(a: number) {
>a : number
this.a = a;
>this.a = a : number
>this.a : number
>this : this
>a : number
>a : number
}
public valueOf() {
>valueOf : () => number
return this.a;
>this.a : number
>this : this
>a : number
}
}
/**
* Return the min and max simultaneously.
*/
export function extent<T extends Numeric>(array: Array<T | Primitive>): [T | Primitive, T | Primitive] | [undefined, undefined] {
>extent : <T extends Numeric>(array: (string | number | boolean | Date | T)[]) => [string | number | boolean | Date | T, string | number | boolean | Date | T] | [undefined, undefined]
>T : T
>Numeric : Numeric
>array : (string | number | boolean | Date | T)[]
>Array : T[]
>T : T
>Primitive : Primitive
>T : T
>Primitive : Primitive
>T : T
>Primitive : Primitive
return [undefined, undefined];
>[undefined, undefined] : [undefined, undefined]
>undefined : undefined
>undefined : undefined
}
let extentMixed: [Primitive | NumCoercible, Primitive | NumCoercible] | [undefined, undefined];
>extentMixed : [undefined, undefined] | [string | number | boolean | Date | NumCoercible, string | number | boolean | Date | NumCoercible]
>Primitive : Primitive
>NumCoercible : NumCoercible
>Primitive : Primitive
>NumCoercible : NumCoercible
extentMixed = extent([new NumCoercible(10), 13, '12', true]);
>extentMixed = extent([new NumCoercible(10), 13, '12', true]) : [undefined, undefined] | [string | number | boolean | Date | NumCoercible, string | number | boolean | Date | NumCoercible]
>extentMixed : [undefined, undefined] | [string | number | boolean | Date | NumCoercible, string | number | boolean | Date | NumCoercible]
>extent([new NumCoercible(10), 13, '12', true]) : [undefined, undefined] | [string | number | boolean | Date | NumCoercible, string | number | boolean | Date | NumCoercible]
>extent : <T extends Numeric>(array: (string | number | boolean | Date | T)[]) => [string | number | boolean | Date | T, string | number | boolean | Date | T] | [undefined, undefined]
>[new NumCoercible(10), 13, '12', true] : (true | NumCoercible | 13 | "12")[]
>new NumCoercible(10) : NumCoercible
>NumCoercible : typeof NumCoercible
>10 : 10
>13 : 13
>'12' : "12"
>true : true
|
