/**
 * Copyright 2017 Matt Acosta
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import { ISyntaxNode } from './ISyntaxNode';
import { ISyntaxToken } from './ISyntaxToken';
import { ISyntaxTrivia } from './ISyntaxTrivia';
import { SyntaxVisitor } from './SyntaxVisitor.Generated';
import { SyntaxWalkerDepth } from './SyntaxWalkerDepth';
/**
 * A syntax visitor that descends through an entire syntax tree.
 *
 * Nodes and tokens are visited in a depth-first order.
 */
export declare class SyntaxWalker extends SyntaxVisitor {
    /**
     * The maximum depth to walk in the syntax tree.
     */
    protected readonly walkerDepth: SyntaxWalkerDepth;
    /**
     * Constructs a `SyntaxWalker` object.
     *
     * @param {SyntaxWalkerDepth=} depth
     *   The maximum depth to walk in the syntax tree.
     */
    constructor(depth?: SyntaxWalkerDepth);
    /**
     * Visits all children of a node.
     */
    defaultVisit(node: ISyntaxNode): void;
    /**
     * Visits a token in the syntax tree.
     */
    visitToken(token: ISyntaxToken): void;
    /**
     * Visits the trivia attached to a token.
     */
    visitTrivia(trivia: ISyntaxTrivia): void;
}