rc-js-util/src/typescript/t-never-predicate.ts

A collection of TS and C++ utilities to help writing performant and correct applications, achieved through strict typing and (removable) invariant checking.

/**
 * @public
 * If TTest is never, return TTrue, else TFalse.
 */
export type TNeverPredicate<TTest, TTrue, TFalse> = (() => TTest) extends () => never ? TTrue : TFalse;