How to detect if an array if dynamic or static

[Adam D. Ruppe via Digitalmars-d-learn]

On Thursday, 25 February 2016 at 01:31:17 UTC, Chris Wright wrote:
> When you get to GC-allocated stuff, there's no way to tell.

The GC is easy, you can simply ask it:

http://dpldocs.info/experimental-docs/core.memory.GC.addrOf.1.html

"If p references memory not originally allocated by this garbage 
collector, if p is null, or if the garbage collector does not 
support this operation, null will be returned."


The append operator uses this kind of logic to determine if it is 
safe to append. The `capacity` property on slices can query, 
though it is zero in some cases where the GC owns it, but it 
still needs reallocation to be appended to (e.g. when the array 
is already at the max length of the allocated block, or when the 
stomping protection kicks in. See: 
http://dlang.org/d-array-article.html )