CODEWITHSUNDEEP
delphi
SOUser
SOUser

Reputation: 3852

Can a property setter use open array parameter?

The doc says dynamic arrays can be passed into a function/procedure using open array parameters.

For example, the following works, in accordance with the doc.

type
  TAInteger = array of Integer;

function Work(const A: array of Integer): Integer;
begin
  Result := Length(A);
end;

However, the code below complains about E2008 Incompatible types:

type
  TTest = class
  private
    procedure SetIntegerArray(const Value: array of Integer);
  published
    property Value: TAInteger write SetIntegerArray;
  end;

I am confused why there is the "Incompatible types" error, and whether a property setter can use open array parameters ?

Upvotes: 1

Views: 271

Answers (1)

David Heffernan
David Heffernan

Reputation: 612993

Can a property setter use open array parameter?

No.

The type of the parameter that contains the new property value must be compatible with the property's type. An open array is not a type. Your property setter must be written like this:

procedure SetIntegerArray(const Value: TAInteger);

Upvotes: 4

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