What are AST Macros?

[retard]

Thu, 08 Jul 2010 21:43:57 -0400, Robert Jacques wrote:

> Check out Walter's slides and/or talk from the D conference.
> (http://www.digitalmars.com/webnews/newsgroups.php?
art_group=digitalmars.D.announce&article_id=12555)
> AST does stand for abstract syntax tree and they are much more like Lisp
> macros as opposed to the C preprocessor.

Too bad nothing happened. He promised AST macros, but it will probably 
still take several years before we have a preliminary implementation and 
maybe 10-20 years before a written spec & almsot bug-free implementation.