TypeScript/tests/cases/compiler/arrayConcat3.ts

// @strictFunctionTypes: true
// TODO: remove lib hack when https://github.com/Microsoft/TypeScript/issues/20454 is fixed
type Fn<T extends object> = <U extends T>(subj: U) => U
function doStuff<T extends object, T1 extends T>(a: Array<Fn<T>>, b: Array<Fn<T1>>) {
    b.concat(a);
}
Array.concat now takes ConcatArray, not ReadonlyArray (#21462) * Overloads in Array.concat now handle ReadonlyArray Previously it was union types, which is slower. * Make arrayConcat3 test stricter * Switch to InputArray instead of adding overloads * Update baselines * Update baselines correctly * Rename to ConcatArray and add slice method Should make it, respectively, easier to understand this specific type and harder to satisfy it by mistake. 2018-02-02 22:20:40 +01:00			`// @strictFunctionTypes: true`
Hack to allow concat to work even when an Array isn't assignable to ReadonlyArray (#20455) 2017-12-07 21:15:12 +01:00			`// TODO: remove lib hack when https://github.com/Microsoft/TypeScript/issues/20454 is fixed`
			`type Fn<T extends object> = <U extends T>(subj: U) => U`
			`function doStuff<T extends object, T1 extends T>(a: Array<Fn<T>>, b: Array<Fn<T1>>) {`
			`b.concat(a);`
			`}`