wrap module, may branch this out to the entire codebase

src/rt/rfwfs/wrap.ts

@@ -0,0 +1,38 @@
+import { Result } from "./enum"
+import { ConstEnum, Entry } from "./types/entry"
+
+type WrapResultEntry<T extends Entry, U> = WrapResult<T | undefined, U>
+type WrapBSearch<T extends Entry> = WrapResult<T, number>
+type WrapResultNone<T> = WrapResult<Result.None, T>
+
+interface WrapResult<T, U> {
+	readonly result: T,
+	readonly some: U
+}
+
+function wrap<T, U>(result: T, some: U): WrapResult<T, U> {
+	return { result: result, some: some }
+}
+
+function wrap_bsearch<T extends Entry>(index: number, result: T): WrapBSearch<T> {
+	return wrap(result, index)
+}
+
+function wrap_entry<U extends ConstEnum, T extends Entry>(status: U, result?: T): WrapResultEntry<T, U> {
+	return wrap(result, status)
+}
+
+function wrap_none<T extends ConstEnum>(status: T): WrapResultNone<T> {
+	return wrap(Result.None, status)
+}
+
+export default wrap
+export {
+	wrap_bsearch,
+	wrap_entry,
+	wrap_none,
+	type WrapResultEntry,
+	type WrapBSearch,
+	type WrapResultNone,
+	type WrapResult,
+}