Type Alias AssertArray<T>

AssertArray: T

Assert that a type is an array or readonly array.

Type Parameters

T extends readonly any[]
Type that must be an array

Remarks

Ensures that the given type is assignable to a tuple or array type. Fails at compile time for non-array types.

Example

type A = AssertArray< number[] >;           // ✓
type B = AssertArray< readonly string[] >;  // ✓
type C = AssertArray< string >;             // ✗ TS error