RFR: 8319117: GrowableArray: Allow for custom initializer instead of copy constructor

[Dean Long]

On Sun, 29 Oct 2023 14:00:25 GMT, Johan Sjölen <jsjolen at openjdk.org> wrote:

> Hi, 
> 
> When using at_put and at_put_grow you can provide a value which will be supplied to the constructor of each element. In other words, you can intialize each element through a copy constructor.
> 
> I suggest that we also provide a function equivalent where the function is provided a pointer to the memory to be initialized. This can be used for `NONCOPYABLE` classes, for example.
> 
> This is implemented using a SFINAE pattern because `nullptr` introduces ambiguity if you use static overload.
> 
> Currently running tier1-tier4.

How do you see this being used?  Shouldn't the filler be part of the template type for the class, so it can be used in the ctor?  Is there really a need for each call to at_put to use a different filler function?

-------------

PR Comment: https://git.openjdk.org/jdk/pull/16409#issuecomment-1786040753