Should this work?

[monarch_dodra]

On Friday, 10 January 2014 at 14:13:37 UTC, marcpmichel wrote:
> On Friday, 10 January 2014 at 14:02:21 UTC, Manu wrote:
>
>> I won't start another annoying thread.
>>
>> What's the go with popFront()... it returns nothing?
>> I almost always want to pop and return the front element. I 
>> can't find a
>> function to do that... have I missed something again?

There isn't (at least, not that I know of). I would be trivial to 
implement, but because it would be implemented in terms of 
front/popFront, it would not be any faster.

*However*, depending on the range type (non-transitive), popping 
might instantaneously invalidate the element you are operating on 
(think "byLine", that returns a "char[]", not a "string").

> It seems you have to use both the .front property to access the 
> element, and popFront() to advance to the next element.
> I can't understand why you need two methods; maybe there's a 
> very good reason for that.

You *need* two methods for the very simple use case of reading 
without popping.

As for returning the popped element when calling pop: It's an 
extra cost. C++ introduced back and pop_back (as well as pop/top) 
with those exact semantics for this reason. D also adds an issue 
of data integrity.