[antlr-interest] Antlr v4 - C++ target

[Gokulakannan Somasundaram]

>
> Don't use templates.
>
> Sigh.
>
> Jim
>
> Jim,
    Have you had a look at Boost spirit parser? They have done the entire
thing with templates. I am only doing the runtime with templates. If you
are concerned with the compile time performance, i am assuring you that i
will limit the use of template not to stress the compiler.
     If there is something very obvious that i am missing, please let me
know.

Thanks,
Gokul.