About void[] and asockets

[Jolly James via Digitalmars-d-learn]

On Wednesday, 22 February 2017 at 17:06:51 UTC, Jolly James wrote:
> On Wednesday, 22 February 2017 at 17:01:11 UTC, Adam D. Ruppe 
> wrote:
>> On Wednesday, 22 February 2017 at 16:55:03 UTC, Jolly James 
>> wrote:
>>> Well, what are these void-arrays for real? I mean, they 
>>> contain data what does not make them really void, does it?
>>
>> They represent an array of anything; the user can pass ubyte[] 
>> to it, or int[] to it, or char[] to it, or anything else (even 
>> string if it is in void[] or const void[]).
>>
>>> And how to I get received data out of Data.content[]?
>>> How to use TcpConnection.send()? E.g. for sending a string?
>>
>> Cast it to `const(ubyte)[]` then use it as a bag of bytes. 
>> That's almost always what you want to do inside.
>>
>> The function signature uses `in void[]` instead of `ubyte[]` 
>> because void will accept strings and other stuff too, whereas 
>> ubyte specifically requires it to be typed as bye.
>>
>> You want to use it INTERNALLY as bytes, but the external 
>> interface can accept almost anything.
>
> Thank you very much!
> Now it makes sense and I understand.

But I have one problem: How to use the constructor of the Data 
class?

No matter how I try, I am always getting:
Error: none of the overloads of '__ctor' are callable using 
argument types (Data*), candidates are: (my-project)