Delphi RTTI TVirtualMethodInterceptor.Create不支持具有重载虚方法的类

Question

我发现TVirtualMethodInterceptor.Create不支持具有重载虚方法的类。举个例子

type
  TLog = class
  public
    constructor Create();

    procedure SaveLog(str: string); overload; virtual;
    procedure SaveLog(str: string; Args: array of const); overload;  virtual;
  end;

constructor TLog.Create(str: string);
begin

end;

procedure TLog.SaveLog(str: string);
begin

end;

procedure TLog.SaveLog(str: string; Args: array of const);
begin

end;


procedure MyTest();
var
  ttt: TLog;
  vmi: TVirtualMethodInterceptor;

begin
  ttt:=TLog.Create();
  try
    vmi:=TVirtualMethodInterceptor.Create(ttt.ClassType);
    try
      //
    finally
      vmi.Free();
    end;
  finally
    ttt.Free();
  end;
end;

执行TVirtualMethodInterceptor.Create()时，会引发异常“Insufficient RTTI available to support this operation”。有人可以帮助我吗？

Answer 1

出现此消息是因为类方法的某些参数未发出 RTTI 信息。这个方法就是这样的

 procedure SaveLog(str: string; Args: array of const); overload;  virtual; //array of const - doesn't emit rtti info.

替换为这个

type
 TConst = array of TVarRec; //this type has rtti information 
 ...
 ...
 procedure SaveLog(str: string; Args: TConst); overload;  virtual;