rvalue references

[Steven Schveighoffer via Digitalmars-d]

On 6/9/15 8:14 AM, Namespace wrote:
> On Tuesday, 9 June 2015 at 11:04:43 UTC, Stewart Gordon wrote:
>> Apologies if I've missed something - I haven't had much time to keep
>> up with the discussions lately.
>>
>> What is the use case for rvalue references in a garbage-collected
>> language?
>>
>> To me, it sounds like people want this feature for D purely because
>> C++ has it.
>>
>> Stewart.
>
> What does this have to do with "garbage-collected language"?
> If I have a big struct, e.g.
> ----
> struct Matrix {
>      float[16] values = [...];
> }
> ----
> I always want to pass it by ref because a move or a copy would be too slow.

It's actually faster to pass an rvalue by value, because it's 
constructed on the stack anyway.

The real reason for this I think is to avoid building multiple functions 
that have identical implementation.

-Steve