import { AsyncCallback, AsyncNodeCallback } from "../_interfaces";
import { EventStream } from "../EventStream";
/**
 * Creates an EventStream from a function that accepts a callback. The function
 * is supposed to call its callback just once.
 *
 * @param f - Function that gets called at the stream activation
 *
 * @example
 *
 * const resultStream = F.fromCallback(cb => {
 *   callSomeLongTask(result => {
 *     cb(processResult(result))
 *   })
 * })
 *
 * @public
 */
export declare function fromCallback<ValueType>(f: AsyncCallback<ValueType>): EventStream<ValueType>;
/**
 * Behaves the same way as `fromCallback`, except that it expects the callback
 * to be called in the Node.js convention: `callback(error, data)`, where error is
 * `null` if everything is fine.
 *
 * @param f - Function that gets called at the stream activation
 * @see fromCallback
 *
 * @example
 *
 * const fileContent = F.fromNodeCallback(cb => {
 *   fs.readFile("myFile.txt", cb)
 * })
 *
 * @public
 */
export declare function fromNodeCallback<ValueType>(f: AsyncNodeCallback<ValueType>): EventStream<ValueType>;