Esrecurse 
Esrecurse (esrecurse) is ECMAScript recursive traversing functionality.
Example Usage
The following code will output all variables declared at the root of a file.
esrecurse.visit(ast, {
XXXStatement: function (node) {
this.visit(node.left);
// do something...
this.visit(node.right);
}
});
We can use Visitor instance.
var visitor = new esrecurse.Visitor({
XXXStatement: function (node) {
this.visit(node.left);
// do something...
this.visit(node.right);
}
});
visitor.visit(ast);
We can inherit Visitor instance easily.
function DerivedVisitor() {
esrecurse.Visitor.call(/* this for constructor */ this /* visitor object automatically becomes this. */);
}
util.inherits(DerivedVisitor, esrecurse.Visitor);
DerivedVisitor.prototype.XXXStatement = function (node) {
this.visit(node.left);
// do something...
this.visit(node.right);
};
And you can invoke default visiting operation inside custom visit operation.
function DerivedVisitor() {
esrecurse.Visitor.call(/* this for constructor */ this /* visitor object automatically becomes this. */);
}
util.inherits(DerivedVisitor, esrecurse.Visitor);
DerivedVisitor.prototype.XXXStatement = function (node) {
// do something...
this.visitChildren(node);
};
License
Copyright (C) 2014 Yusuke Suzuki (twitter: @Constellation) and other contributors.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL