import { Optional } from "./core";
/**
 * https://developer.mozilla.org/en-US/docs/Glossary/Truthy
 * @param ctxObject it can be null or undefined
 * @param receiverFn lambda that accepts `it`; only runs if `ctxObject` property is truthy
 * @return ctxObject the first argument
 */
export declare const _callIfTruthy: <T>(ctxObject: Optional<T>, receiverFn: TruthyReceiverFn<T>) => Optional<T>;
export declare type TruthyReceiverFn<T> = (it: T) => void;
export declare const _callIfTruthyWithReturn: <T, R>(ctxObject: Optional<T>, onTrue: TruthyReceiverWithReturnValueFn<T, R>, onFalse: SimpleReceiverWithReturnValueFn<R>) => R;
export declare type TruthyReceiverWithReturnValueFn<T, R> = (it: T) => R;
/**
 * https://developer.mozilla.org/en-US/docs/Glossary/Falsy
 * @param ctxObject it can be null or undefined
 * @param receiverFn lambda that only runs if `ctxObject` property is falsy
 */
export declare const _callIfFalsy: (ctxObject: unknown, receiverFn: FalsyReceiverFn) => void;
export declare type FalsyReceiverFn = () => void;
export declare const _repeat: (count: number, fun: () => void) => void;
export declare const _callIfTrue: (ctxObject: boolean, onTrueReceiverFn: SimpleReceiverFn, onFalseReceiverFn?: SimpleReceiverFn | undefined) => void;
export declare const _callIfFalse: (ctxObject: boolean, onFalseReceiverFn: SimpleReceiverFn, onTrueReceiverFn?: SimpleReceiverFn | undefined) => void;
export declare type SimpleReceiverFn = () => void;
export declare const _callIfTrueWithReturn: <T>(ctxObject: boolean, onTrueReceiverFn: SimpleReceiverWithReturnValueFn<T>, onFalseReceiverFn: SimpleReceiverWithReturnValueFn<T>) => T;
export declare type SimpleReceiverWithReturnValueFn<T> = () => T;