import { EventInvocationOpts, TypedEventHandler } from '../typed-event-interfaces';
/**
 * The result of an event invocation.
 *
 * Since handlers are 'void', this type contains only whether the invocation succeeded
 * and, if it has not, what the error was
*/
export declare type EventInvocationResult = {
    succeeded: boolean;
    error?: unknown;
};
/**
 * Safely invokes the given event handler
 *
 * @export
 * @template TSender The type of the event's sender (source)
 * @template TArgs The type of the arguments provided to the event handler
 * @param {TypedEventHandler<TSender, TArgs>} handler The handler to invoke
 * @param {TSender} sender the 'sender' to provide to the handler
 * @param {TArgs} args The arguments to provide to the handler
 * @return {*}  {EventInvocationResult} The handler invocation result
 */
export declare function eventHandlerSafeInvoke<TSender, TArgs>(handler: TypedEventHandler<TSender, TArgs>, sender: TSender, args: TArgs): EventInvocationResult;
/**
 * Safely and asynchronously invokes the given event handler
 *
 * @export
 * @template TSender The type of the event's sender (source)
 * @template TArgs The type of the arguments provided to the event handler
 * @param {TypedEventHandler<TSender, TArgs>} handler The handler to invoke
 * @param {TSender} sender the 'sender' to provide to the handler
 * @param {TArgs} args The arguments to provide to the handler
 * @return {*} {Promise<EventInvocationResult>} A promise that is fulfilled when the handler execution concluded.
 * Contains a boolean specifying whether the invocation was successful and, if not, what the error was.
 */
export declare function eventHandlerSafeInvokeAsync<TSender, TArgs>(handler: TypedEventHandler<TSender, TArgs>, sender: TSender, args: TArgs): Promise<EventInvocationResult>;
/**
 * Invokes all given event handlers in accordance with the given `EventInvocationOpts`
 *
 * @export
 * @template TSender The type of the event's sender (source)
 * @template TArgs The type of the arguments provided to the event handlers
 * @param {Iterable<TypedEventHandler<TSender, TArgs>>} handlers
 * @param {TSender} sender the 'sender' to provide to the handlers
 * @param {TArgs} args The arguments to provide to the handlers
 * @param {EventInvocationOpts} options Options to control the exact behavior of the invocation
 */
export declare function invokeEventHandlers<TSender, TArgs>(handlers: Iterable<TypedEventHandler<TSender, TArgs>>, sender: TSender, args: TArgs, options: EventInvocationOpts): void;
/**
 * Asynchronously invokes all given event handlers in accordance with the given `EventInvocationOpts`
 *
 * @export
 * @template TSender The type of the event's sender (source)
 * @template TArgs The type of the arguments provided to the event handlers
 * @param {Iterable<TypedEventHandler<TSender, TArgs>>} handlers
 * @param {TSender} sender the 'sender' to provide to the handlers
 * @param {TArgs} args The arguments to provide to the handlers
 * @param {EventInvocationOpts} options Options to control the exact behavior of the invocation
 * @return {*} {Promise<void>} A Promise that is fulfilled when all event handlers have been invoked
 */
export declare function invokeEventHandlersAsync<TSender, TArgs>(handlers: Iterable<TypedEventHandler<TSender, TArgs>>, sender: TSender, args: TArgs, options: EventInvocationOpts): Promise<void>;