Array Appending Plus Postblits

[Steven Schveighoffer]

On Tue, 23 Nov 2010 23:43:34 -0500, dsimcha <dsimcha at yahoo.com> wrote:

> I was browsing through druntime's lifetime.d for an unrelated reason and  
> I
> noticed that, when an array is copied for the purpose of appending to  
> it, the
> postblits are not called on the new array if it is an array of structs.   
> Is
> there something I'm missing, or is this a bug that somehow noone has  
> noticed
> up to this point?

Array appending does not respect any of the new copy construction  
semantics.  It basically does a memcpy and that's it.  It doesn't even  
respect shared (shared data is memcpy'd just like any other data),  
although it does use a lock to protect shared appends.

I see there is a postblit function in the typeinfo, so it should be  
possible to do the right thing.

One thing I'm unsure of is how postblit works on const or immutable  
structs, anyone know?  There is no typechecking in the array functions,  
everything is a void[].

File a bug on it please.

-Steve