import { type Operation } from "effection";
import type { ValueSignal } from "./types.ts";
/**
 * Interface for return value of {@link createArraySignal}.
 */
export interface ArraySignal<T> extends ValueSignal<T[]> {
    /**
     * Pushes a new value onto the end of the array.
     *
     * @param item - The value to push onto the array.
     * @returns The new length of the array.
     */
    push(...args: T[]): number;
    /**
     * Removes the first value from the array and returns it.
     * If the array is empty, the operation will block until a value is available.
     *
     * @returns The first value from the array.
     */
    shift(): Operation<T>;
    /**
     * Returns the current value of the array.
     *
     * @returns The current value of the array.
     */
    valueOf(): Readonly<T[]>;
    /**
     * Returns the length of the array.
     *
     * @returns The length of the array.
     */
    get length(): number;
}
/**
 * A signal for an immutable array value. The stream emits the
 * current value of the array and new values when the array is updated. The array
 * is immutable and cannot be changed. Instead, the value is replaced with a new
 * value.
 *
 * @param initial - The initial value of the signal.
 * @returns A stream of immutable array values.
 */
export declare function createArraySignal<T>(initial: Iterable<T>): Operation<ArraySignal<T>>;
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