[fpc-pascal] RTFM question (?): which variables/fields are initialized by fpc?

[Michael Van Canneyt]

On Sun, 22 Feb 2015, Bart wrote:

> Hi,
>
> I cannot find it in the docs (probably not looking in the right place).
>
> Which variables/class-fields are initialized by the compiler?
>
> My understanding is that:
> - global vars are initialized (zero, false, empty string etc)
> - local vars are not
>
> But what about class fields?
>
> Typically I do
>
> type
>  TA = Class
>  private
>    FInt: Integer;
>    FBool: Boolean;
>    FString: String;
>    FPoint: TPoint;
>   ....
>   end;
>
> constructor TA.Create;
> begin
>  FInt:=0;
>  FBool:=False;;
>  FString:='';
>  FPoint:=Point(0,0);
>  ...
> end;
>
> 1. Is this necessary, and if not, for which types can it be omitted?
> (skip if you know 2)

It is not necessary. When a class is created, it's memory is zeroed out.

> 2. Where is it documented?

Good point. I looked for it, and it is not documented. 
I guess this should be added to section 6.1, will do so.

> 3. Does it work the same as in Delphi?

Yes.

Michael.