Implementation of procedure <T: Record>

[Json 0]

unit Unit2;

interface

uses
   System.Classes;

type
  TTestClass = class
  public
     procedure Test<T: record>;
  end;

implementation

//procedure TTestClass.Test<T: record>;
//begin
//    [dcc32 Error] Unit2.pas(21): E2029 ',', ';' or '>' expected but ':' found
//end;

procedure TTestClass.Test<T>;
begin

end;

end.

 

Delphi 11.3

Why do I need to leave out  : record in the implementation for the code to compile?

 

 

 

[Stefan Glienke 2104]

Because the language spec - pardon, the compiler - says so.

 

Constraints on generics are part of the declaration.

Edited Friday at 09:49 AM by Stefan Glienke