Hello together!

Announcing a small feature this time, but some might appreciate it: FPC now supports the declaration of threadvars inside class and record types.

=== code begin ===

{$mode objfpc}
{$modeswitch advancedrecords}
type
   TTestClass = class
   public class threadvar
     Test: LongInt;
   end;
   TTestRecord = record
   public class threadvar
     Test: LongInt;
   end;
begin
   TTestClass.Test := 42;
   TTestRecord.Test := 21;
end.

=== code end ===

A threadvar section is started using "class threadvar" and the "class" specifier is required. They are accessed like ordinary class variables with the difference that they'll hold different values per thread - the same as global threadvars after all.

This feature is Delphi compatible (and was added, because I noticed that Delphi supported it and FPC did not 😅)

Regards,
Sven