Eliminate assert and lazy from D?

[Andrei Alexandrescu]

Right now, the language has enough power to express assert as a library 
function, as opposed to a primitive construct. (See e.g. enforce.) I 
think it would be good to relegate assert to object.d.

This also brings up "lazy", which seems to be quite botched. Are there 
suggestions on how to replicate its functionality in a different way? I 
even seem to recall lazy was discussed as a disadvantage in the recent 
dialog on reddit, see

http://www.reddit.com/r/programming/comments/9qf8i/i_wrote_some_d_today_and_its_completely_blowing/

I personally believe it's useful to be able to pass an unevaluated 
expression into a function, for example assert and enforce themselves 
use that.

But let's open this for discussion: should assert and/or lazy be 
removed? If not, why not? It yes, why? How can we replicate their 
functionality?


Andrei