E2564 Undefined type '%s' (Delphi)
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This occurs when trying to define a type restraint on a generic type using itself.
program E2564;
{$APPTYPE CONSOLE}
type
TRec<T: record> = record
A: T;
end;
TClass = record
V: TRec<TClass>; //E2564
end;
begin
end.