freepascal.compiler/docs/typinfex/ex13.pp

Program example13;

{ This program demonstrates the GetPropList function }

uses 
  rttiobj,typinfo;
  

Var
  O : TMyTestObject;
  PT : PTypeData;
  PI : PTypeInfo;
  I,J : Longint;
  PP : PPropList;
  prI : PPropInfo;

begin
  O:=TMyTestObject.Create;
  PI:=O.ClassInfo;
  PT:=GetTypeData(PI);
  Writeln('Total property Count : ',PT^.PropCount);
  GetMem (PP,PT^.PropCount*SizeOf(Pointer));
  J:=GetPropList(PI,OrdinalTypes,PP);
  Writeln('Ordinal property Count : ',J);
  For I:=0 to J-1 do
    begin
    With PP^[i]^ do
      begin
      Write('Property ',i+1:3,': ',name:30);
      writeln('  Type: ',TypeNames[typinfo.PropType(O,Name)]);
      end;
    end;
  FreeMem(PP);   
  O.Free; 
end.