E2514 Type parameter '%s' must support interface '%s' (Delphi)

Go Up to Error and Warning Messages (Delphi) Index

This occurs when the type constraint for T is not satisfied (here, to implement IComparable).

program E2514;
 
{$APPTYPE CONSOLE}
 
uses
  SysUtils;
 
type
  TMyClass = class
  end;
 
  IMyGenericInterface<T: IComparable> = interface
  end;
 
var
  genVar: IMyGenericInterface<TClass>;
 
begin
  Writeln('E2514 Type parameter ''%s'' must support interface ''%s''');
end.