Thank you very much for your suggestion, I will modify my code and use RecursiveASTVisitor instead :D Sirinda -- View this message in context: http://clang-developers.42468.n3.nabble.com/A-newbie-question-on-getting-operator-in-Expr-tp3073430p3080192.html Sent from the Clang Developers mailing list archive at Nabble.com.