import { InternalRuntimeError } from '../errors/base';
import type { Node } from '../types';
/**
 * Subclass of {@link InternalRuntimeError} thrown by the {@link assert} function.
 */
export declare class AssertionError extends InternalRuntimeError {
    constructor(explanation: string, node?: Node);
}
/**
 * Throws an {@link AssertionError} if the provided condition is false. This error should only be thrown
 * when internal `js-slang` code enters an unexpected state. This should never be thrown by user code.
 */
export default function assert(condition: boolean, message: string, node?: Node): asserts condition;