I didn't claim that Lisp's CST (concrete syntax tree) is equivalent to C++'s AST. I just wanted to point out that more and more modern languages adopt features

I didn't claim that Lisp's CST (concrete syntax tree) is equivalent to C++'s AST. I just wanted to point out that more and more modern languages adopt features of Lisp, or try to embed Lisp. C++ praises lambda expressions as new feature while this feature has been around in the Lisp world for more than 50 years. Background information about CST/AST: http://lambda-the-ultimate.org/node/1040 http://lambda-the-ultimate.org/node/1040