What's missing to make D2 feature complete?

[via Digitalmars-d]

On Wednesday, 24 December 2014 at 09:46:11 UTC, Kagamin wrote:
> On Wednesday, 24 December 2014 at 09:18:43 UTC, Ola Fosheim 
> Grøstad wrote:
>> Validation does not belong to the implementation, so "the 
>> right way" is to put it in a wrapper before you call the 
>> function that does the actual work.
>
> Unlikely to be done. Sanitization is usually done in place.

You could improve this by having "parameterless light weight 
lambdas":

immutable i = { ...mutable computation...; return x+n; }

Doing things "in place" is kind of pointless if the SSA form in 
the back-end turns it into immutable anyway. If it is done 
"proper in place" you no longer have a value type, but a 
reference type...