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Mailing lists / fpc-pascal / 2011-02

Error: Can't take the address of constant expressions

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Roland Turcan

Hello all,

I have this code:

type TMyObj = class
              private
                MyPWord:PWord;
                ...
              end;
procedure TMyObj.Some;
begin
  ...
  Inc (Cardinal (MyPWord), 2);
  ...
end;

and compiler says %subj%

This code works fine on 32bit compiler, but what should I change to get this running on 64bit and get the code still compatible with 32bit compiler as well.

Thanks.

Best regards, TRoland http://www.rotursoft.sk http://exekutor.rotursoft.sk
Jonas Maebe
to Roland Turcan
Roland Turcan wrote 18 lines
type TMyObj = class private MyPWord:PWord; ... end; procedure TMyObj.Some; begin ... Inc (Cardinal (MyPWord), 2); ... end; and compiler says %subj% This code works fine on 32bit compiler, but what should I change to get this running on 64bit and get the code still compatible with 32bit compiler as well.
Change
 Inc (Cardinal (MyPWord), 2);
into
 Inc (MyPWord);

(note: *without* the "2"; that is implicit because MyPWord points to data items of size 2)

Jonas