[antlr-interest] How to duplicate a subtree into a tree

[duboimat at iro.umontreal.ca]

Hello,

I would like to know how to duplicate a subtree to build a new one.
When I add two time the same subtree in a new one, my computer will stuck

like
klo.addChild(kl.getFirstChild());
klo.addChild(kl.getFirstChild());

thank you
Mat

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