If structures places data to stack why we do not getting stackoverflow on array of structures?

[Steven Schveighoffer via Digitalmars-d-learn]

On 8/16/17 10:32 AM, Suliman wrote:
> On Wednesday, 16 August 2017 at 13:41:29 UTC, Biotronic wrote:
>> On Wednesday, 16 August 2017 at 12:50:07 UTC, Suliman wrote:
>>>> MyStruct[] is actually a struct similar to this:
>>>>
>>>> struct MyStruct[] {
>>>>     MyStruct* ptr;
>>>>     size_t length;
>>>> }
>>>>
>>>> That struct is placed on the stack, but the data it points to, via 
>>>> the ptr field, is heap allocated.
>>>
>>> What is struct? Just name and size?
>>
>> I'm sorry, I don't understand what you're asking. Can you please 
>> repeat with more information?
>>
>> -- 
>>   Biotronic
> 
> I am trying to understand what structure is. It's name + associated with 
> this name data? I can't understand for my self what mean no put 
> structure to stack. Just put it's name to it or something another?

The structure is just a pointer and length. What it points at is not on 
the stack, it's in the heap.

This is how a dynamic array works. Indeed:

auto x = new int[10000];
pragma(msg, x.sizeof); // 16LU

-Steve