Why D const is annoying

[bearophile]

Jonathan M Davis:

> Per isInputRange!(typeof(arr)), no. It has the right functions, but it can't 
> use them, because it's const. 
> [... snip]
> 
> Ranges are too heavily used 
> with their current API for us to change it that drastically now.

Thank you Jonathan for taking the time to explain me all that :-)
I am taking years to learn D well :-)

Bye,
bearophile