Return a class instance as a pointer

[Timo Westkämper" <timo.westkamper at gmail.com>]

On Saturday, 31 March 2012 at 15:29:15 UTC, Jacob Carlborg wrote:
> On 2012-03-31 17:02, "Timo Westkämper" 
> <timo.westkamper at gmail.com>" wrote:
>> I am trying to compile the following code in D
>>
>> void* instantiate(_LV2_Descriptor* descriptor,
>> double sample_rate, char * bundle_path,
>> LV2_Feature** features) {
>> Plugin plugin = new Bleep(sample_rate, features);
>> return &plugin;
>> }
>>
>> but I get the following error
>>
>> ../src/lv2/plugin.d(38): Error: escaping reference to local 
>> plugin
>>
>> What is the right way to create a class instance and a return 
>> it as a
>> pointer? Also in such a way that it is not claimed by GC. 
>> There is
>> another callback for object deletion.
>
> Why would you want to return an object as a pointer? All 
> classes are reference types. But if you actually do want to 
> return an object as a pointer you can just cast it to void*.

I am writing a D binding for the LV2 audio plugin API.  The 
instantiate function expects a void* return. I wouldn't use void* 
casts in D code which doesn't interface with C.

The cast worked, thanks.