import * as S from './types';
export declare type VisitFunction<T> = (node: T) => void;
export interface VisitObject<T> {
    enter?: VisitFunction<T>;
    exit?: VisitFunction<T>;
}
export declare type Visit<T> = VisitFunction<T> | VisitObject<T>;
export declare type Visitor = {
    [K in S.NodeType]?: Visit<S.NodeTypes[K]>;
};
export declare function visit<T extends S.Node>(node: T, visitor: Visitor): void;