What library functionality would you most like to see in D?

[Jonathan M Davis]

I think that it would be useful to query the community for what piece of 
library functionality they don't currently have in D and would most like to 
see. For instance, there is no official logging framework in D or any 3rd party 
libraries which do it AFAIK. So, that could be one type of functionality that 
you may like to see. Now, there is a prospective implementation for std.log 
which shouldn't be all that far away from being reviewed, so listing that here 
wouldn't be all that useful, since it's on its way. But what other major 
functionality do you miss in D that other languages' that you use have 
available in their libraries?

My hope here would be that we could get some good ideas going here such that 
we have can have a better idea what type of functionality it would be 
particularly useful to be working on for Phobos or 3rd party D libraries for 
the community, and maybe it'll even get some people to actually go and work on 
these ideas so that we can improve the libraries that we have to work with in 
D. We can always use more help, and we definitely need a richer library 
ecosystem for D. But even just discussing ideas could be of benefit.

So, what major functionality which we don't currently have would you like to 
see in either Phobos or in a 3rd party library so that you could use it in 
your D programs?

- Jonathan M Davis