Support for C++ parsing with GCC

[git-afsantos]

Found a useful link: http://digitocero.com/en/blog/exporting-and-visualizing-gccs-abstract-syntax-tree-ast

And a StackOverflow question: https://stackoverflow.com/questions/15800230/how-can-i-dump-an-abstract-syntax-tree-generated-by-gcc-into-a-dot-file