[fpc-pascal] Const attributes
Howard Page-Clark
hdpc at talktalk.net
Sun Jul 30 21:35:44 CEST 2017
On 30/07/17 19:55, Marcos Douglas B. Santos wrote:
> I would like to instantiate my attribute only once inside constructor
> and then it will be "const" or "final", I mean, immutable.
> Today it is not possible, right? Any thoughts to the future?
It is not what you are asking for, but you can do this:
===code begin===
{$J-}
const
INT: Integer = 9;
type
TFoo = class
strict private
function GetINT: Integer;
public
property INT: Integer read GetINT;
end;
function TFoo.GetINT: Integer;
begin
Exit(INT);
end;
===code end===
The INT property is 'immutable' because it is read-only, and you cannot
assign to its typed integer referent because of the {$J-}.
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