Array of record initialization

Question

I have this type:

type
  TFieldRec = array of record
    FieldName: string;
    Value: Variant;
    DataType: TFieldType;
    Data: Pointer;
  end;

And the code:

var
  FR: TFieldRec;
SetLength(FR, 5);

My question: is it guaranteed that each record element will be initialize with default values?

'', Unassigned, ftUnknown, nil

In the debugger I can see it is true. But I remember records should be initialized with Initialize (or is it Finalize?)

Kromster · Accepted Answer · 2018-11-27 10:33:55Z

8

My question: is it guaranteed that each record element will be initialized with default values?

Yes, this is guaranteed.

The SetLength documentation says (my emphasis):

Existing elements in the array are preserved and newly allocated space is set to 0 or nil.

Kromster

7,5108 gold badges70 silver badges118 bronze badges

answered Nov 26, 2018 at 10:41

David Heffernan

616k46 gold badges1.1k silver badges1.5k bronze badges

Sign up to request clarification or add additional context in comments.

1 Answer 1