Make new routing system the default

src/util/support/types.ts

@@ -4,6 +4,10 @@ export type Awaitable<T> = T | Promise<T>
 /** Type alias for something that may be undefined. */
 export type Maybe<T> = T | undefined
 
+export type MaybeArr<T extends [...any[]]> = {
+    [Index in keyof T]: Maybe<T[Index]>
+} & {length: T['length']}
+
 export type Either<T1, T2> = Left<T1> | Right<T2>
 
 export type Left<T> = [T, undefined]
@@ -26,6 +30,14 @@ export function right<T>(what: T): Right<T> {
     return [undefined, what]
 }
 
+export function unleft<T>(what: Left<T>): T {
+    return what[0]
+}
+
+export function unright<T>(what: Right<T>): T {
+    return what[1]
+}
+
 /** Type alias for a callback that accepts a typed argument. */
 export type ParameterizedCallback<T> = ((arg: T) => any)