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ast.js: add a property 'cloned_from' which referred to the origin ast instance to the cloned ast; otherwise we will lose connection between transformer.before and transformer.after

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Kael 2012-12-28 11:34:44 +08:00
parent 9916d0e547
commit 842212d5d0
1 changed files with 4 additions and 1 deletions
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lib/ast.js
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@ -89,7 +89,10 @@ var AST_Token = DEFNODE("Token", "type value line col pos endpos nlb comments_be
var AST_Node = DEFNODE("Node", "start end", { var AST_Node = DEFNODE("Node", "start end", {
clone: function() { clone: function() {
return new this.CTOR(this); var cloned = new this.CTOR(this);
cloned.cloned_from = this;
return cloned;
}, },
$documentation: "Base class of all AST nodes", $documentation: "Base class of all AST nodes",
$propdoc: { $propdoc: {