Few recent dmd pull requests

[bearophile via Digitalmars-d]

Lionello Lunesu:

> I've closed the "valueRange" PR because I now think it's not a 
> good idea, since the values it returns are not stable and any 
> code using it can break in the future as VRP gets smarter. The 
> obvious cases ("valueRange of ubyte returning 0 and 255 resp.") 
> can already be tested by using implicit integer casts, as 
> @yebblies has mentioned in that PR.

OK. But the other idea (value range for if/then, and for pre/post 
conditions) is still useful.

Bye,
bearophile