Delphi Error – E2569 Type parameter ‘%s’ may need finalization – not allowed in variant record. Consider using RECORD constraint

Delphi 27 Views 1 Min Read

Delphi Compiler Error

E2569 Type parameter ‘%s’ may need finalization – not allowed in variant record. Consider using RECORD constraint

Reason for the Error & Solution

This occurs when using a type constraint in a record that may not be compatible with record rules (no inheritance, no methods). 

program E2569;

{$APPTYPE CONSOLE}

uses
  SysUtils;

type
TGenRec<T> = record //E2569 Fix: use TGenRec<T : record> = record
    case Boolean of
      True: (A: T);
      False: (B: Pointer);
  end;
begin

end.
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