export type FunctionOfTtoK<T, K> = (v: T) => K;
export type AsyncFunctionOfTtoK<T, K> = (v: T) => Promise<K>;
export type FunctionOfT<T> = () => T;
export type AsyncFunctionOfT<T> = () => Promise<T>;
export type Predicate = () => boolean;
export type PredicateOfT<T> = (v: T) => boolean;
export type ActionOfT<T> = (v: T) => void;
export type AsyncActionOfT<T> = (v: T) => Promise<void>;
export type Action = () => void;
export type AsyncAction = () => Promise<void>;
export type ActionNever = () => never;
export type Some<T> = T extends None ? never : T;
export type None = null | undefined | void;
export type Known<TValue> = Exclude<unknown, TValue>;
export type ErrorHandler<TError> = FunctionOfTtoK<unknown, Some<TError>>;
export declare const never: ActionNever;
export declare function isDefined<T>(value: T | None): value is T;
export declare function isSome<T>(value: Some<T> | None): value is Some<T>;
export declare function isNone<T>(value: Some<T> | None): value is None;
export declare function isFunction(value: unknown): value is Function;
export declare function isPromise<TValue>(value: unknown): value is Promise<TValue>;
export type MaybeMatcher<TValue, TNewValue> = {
    some: FunctionOfTtoK<TValue, Some<TNewValue>>;
    none: FunctionOfT<Some<TNewValue>>;
};
export type MaybeMatcherNoReturn<TValue> = {
    some: ActionOfT<TValue>;
    none: Action;
};
export type ResultMatcher<TValue, TError, TNewValue> = {
    success: FunctionOfTtoK<TValue, Some<TNewValue>>;
    failure: FunctionOfTtoK<TError, Some<TNewValue>>;
};
export type ResultMatcherNoReturn<TValue, TError> = {
    success: ActionOfT<TValue>;
    failure: ActionOfT<TError>;
};
/**
 * Sourced from https://github.com/ReactiveX/rxjs/blob/7268bd31d1cb30cf01a1a69a7b14458e15b76b58/src/internal/util/pipe.ts
 * @param fns
 * @returns
 */
export declare function pipeFromArray<T, R>(fns: Array<FunctionOfTtoK<T, R>>): FunctionOfTtoK<T, R>;
export declare function noop(): void;
export declare function noop<T>(value: Some<T>): Some<T>;