AST macros

[Walter Bright]

Daniel Keep wrote:
> Question: in terms of usage, will these macros be like functions?

Yes. No !( ) syntax.

> Or
> will we able to define, say, a new kind of control structure with
> keywords?

No. Abner Hale thwacks such things with "abomination!"

>  Or perhaps even a construct with a trailing curly brace block?

Yes.

> You spoil us Walter, you really do.

macros should be the final piece needed to make DSL's work nicely, and 
they are actually rather simple conceptually and implementation-wise. I 
tried for a long time to figure out how to make templates do the work, 
until I finally realized that AST macros are *fundamentally different* 
from templates.

A nice side benefit to macros is we should be able to deprecate lazy.