1 ### Esrecurse [](http://travis-ci.org/estools/esrecurse)
3 Esrecurse ([esrecurse](http://github.com/estools/esrecurse)) is
4 [ECMAScript](http://www.ecma-international.org/publications/standards/Ecma-262.htm)
5 recursive traversing functionality.
9 The following code will output all variables declared at the root of a file.
12 esrecurse.visit(ast, {
13 XXXStatement: function (node) {
14 this.visit(node.left);
16 this.visit(node.right);
21 We can use `Visitor` instance.
24 var visitor = new esrecurse.Visitor({
25 XXXStatement: function (node) {
26 this.visit(node.left);
28 this.visit(node.right);
35 We can inherit `Visitor` instance easily.
38 function DerivedVisitor() {
39 esrecurse.Visitor.call(/* this for constructor */ this, /* visitor object. */ this);
41 util.inherits(DerivedVisitor, esrecurse.Visitor);
42 DerivedVisitor.prototype.XXXStatement = function (node) {
43 this.visit(node.left);
45 this.visit(node.right);
49 And you can invoke default visiting operation inside custom visit operation.
52 function DerivedVisitor() {
53 esrecurse.Visitor.call(/* this for constructor */ this, /* visitor object. */ this);
55 util.inherits(DerivedVisitor, esrecurse.Visitor);
56 DerivedVisitor.prototype.XXXStatement = function (node) {
58 this.visitChildren(node);
64 Copyright (C) 2014 [Yusuke Suzuki](http://github.com/Constellation)
65 (twitter: [@Constellation](http://twitter.com/Constellation)) and other contributors.
67 Redistribution and use in source and binary forms, with or without
68 modification, are permitted provided that the following conditions are met:
70 * Redistributions of source code must retain the above copyright
71 notice, this list of conditions and the following disclaimer.
73 * Redistributions in binary form must reproduce the above copyright
74 notice, this list of conditions and the following disclaimer in the
75 documentation and/or other materials provided with the distribution.
77 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
78 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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80 ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
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82 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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