D-

[Zachary Lund]

On 02/11/2012 07:00 PM, Jonathan M Davis wrote:
> On Sunday, February 12, 2012 01:40:50 Zachary Lund wrote:
>> Btw, I'm not very fluent in the inner workings of a garbage
>> collector implementation but how does one go about concatenating
>> to an array in a garbage collector as compared to manual memory
>> management? I believe array concatenation can be done in
>> std::vector with the insert() function just fine. Isn't it as
>> simple as determining both array sizes and allocating enough
>> memory for both arrays? I could be oversimplifying things...
>
> Read this:
>
> http://www.dsource.org/projects/dcollections/wiki/ArrayArticle
>
> Appending to vectors is very different from appending to dynamic arrays because
> dynamic arrays do _not_ own their own memory (the GC does) and not only could
> other slices refer the same memory (in which case, you can't just free that
> memory when an array gets reallocated due to running out of space to append
> to), but they could already refer to the memory one past the end of the array,
> making it so that it can't expand into that memory.
>
> Slices change the entire equation. And the way slices are designed, they
> require the GC.
>
> - Jonathan M Davis

Right but they use the same semantics and the information to do either 
seems to be present. I'm not sure why an abstraction between the two 
cannot be made.