import { NodeDefinition, NodeLike, StatelessGraphNode, StatelessNodeDefinition, StatelessNodeType } from '../../types/graph';
/**
 * An instance of the [[eq]] node.
 * See the [[eq]] documentation to find out more.
 */
export interface EqNode extends StatelessGraphNode<'eq', EqNodeProperties> {
}
/**
 * A definition of the [[eq]] node.
 * See the [[eq]] documentation to find out more.
 */
export interface EqNodeDefinition extends StatelessNodeDefinition<'eq', EqNodeProperties> {
}
export interface EqNodeProperties {
    left: NodeDefinition;
    right: NodeDefinition;
}
/**
 * The implementation of the [[eq]] node.
 * See the [[eq]] documentation to learn more.
 */
export declare const EqNodeType: StatelessNodeType<'eq', EqNodeProperties>;
/**
 * Creates a new instance of an [[eq]] node, which is used when comparing values of two other graph nodes.
 * It resolves to `value(true)` when the values are equal (using the strict equality operator) or to
 * `value(false)` when they're not equal.
 *
 * Both operands of the [[eq]] must resolve to a [[value]]. It will throw an error if either
 * one of them does not resolve to a [[value]].
 *
 *
 * @example **Comparing values**
 * ```js
 * import muster, { computed, eq } from '@dws/muster';
 *
 * const app = muster({});
 * await app.resolve(eq(1, 1)) // === true
 * await app.resolve(eq(123, 321)) // === false
 * await app.resolve(eq('1', 1)) // === false
 * await app.resolve(eq('Hello world', 'Hello world')) // === true
 * await app.resolve(eq(computed([], () => 123), 123)) // === true
 * await app.resolve(eq('test 1', 'test 2')) //=== false
 * ```
 */
export declare function eq(left: NodeDefinition | NodeLike, right: NodeDefinition | NodeLike): EqNodeDefinition;
export declare function isEqNodeDefinition(value: NodeDefinition): value is EqNodeDefinition;