Counter-Proposal: restrict & tagged functions

[SomeDude]

On Saturday, 1 September 2012 at 16:20:14 UTC, Dmitry Olshansky 
wrote:
....
> 6. Probably we need a way to alias a list of restictions to 
> ease the use of frequent combinations. (No idea, but any sane 
> syntax around alias will do)

So you can tailor precisely the language to your own 
requirements, by basically inserting compiler switches in the 
code.
That is a very smart idea, but I don't see how this could play 
well with most of the std lib.