Re: [fpc-pascal] Union followed by Property does not compile !

[Michael Van Canneyt via fpc-pascal]

On Mon, 1 Aug 2022, Skybuck Flying via fpc-pascal wrote:

}

{$mode objfpc}{$H+}

You need additionally a modeswitch for advanced records, or properties in
records will not work:

{$modeswitch advancedrecords}

            // UNION example
            case integer of
                  0 : ( mData : int64 );
                  1 : ( mByte : packed array[0..7] of byte );

            // DOES COMPILE
      end;

      TDataExample2 = record
           mField : integer;


            // UNION example
            case integer of
                  0 : ( mData : int64 );
                  1 : ( mByte : packed array[0..7] of byte );

            // !!! DOES NOT COMPILE, PROBLEM !!!
            property Field : integer read mField write mField;
      end;

The variant part of a record must always come last. 
The property should be moved  to before the 'case' :

TDataExample2 = record
  mField : integer;
  property Field : integer read mField write mField;
  case integer of
  0 : ( mData : int64 );
  1 : ( mByte : packed array[0..7] of byte );
end;


This compiles when I tried.

Michael._______________________________________________
fpc-pascal maillist  -  fpc-pascal@lists.freepascal.org
https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal