Pointer to std.container.Array data for C library

[Oleg via Digitalmars-d-learn]

On Friday, 28 August 2015 at 18:40:33 UTC, John Colvin wrote:
> On Friday, 28 August 2015 at 18:31:00 UTC, Oleg wrote:
>> On Friday, 28 August 2015 at 18:21:04 UTC, John Colvin wrote:
>>> On Friday, 28 August 2015 at 17:45:21 UTC, Oleg wrote:
>>>> Hello!
>>>> Is it possible to get pointer to a data in 
>>>> std.container.Array like .ptr from an array? I need to pass 
>>>> a pointer to some C function (from DerelictGL3 binding) and 
>>>> avoid GC allocation.
>>>> Thank you!
>>>
>>> I'm pretty sure you can just take the address of the first 
>>> element, e.g. &a[0] or &a.front
>>
>> I've tried, it throws
>> core.exception.RangeError@/usr/include/dmd/phobos/std/container/array.d(571): Range violation
>
> That's unexpected. Could you provide a full example that does 
> this?

I found solution. I call length instead of reserve. It calls 
ensureInitialized and everything works fine. By default, Array 
won't initialize store.