DIP 50 - AST macros

[Walter Bright]

On 11/13/2013 2:18 PM, deadalnix wrote:
> Was is missing is the capability to look into the lazy parameter's ast and act
> accordingly.
>
> Here you can wrap something around code, not generation code depending on passed
> code.

That's correct. But you can look into the AST with expression templates. So, 
expression templates combined with lazy arguments and mixin templates may fill 
the problem space.