Smart pascal source code


type
  TEvent = procedure(s: String);

type
  TMyEvent = TEvent;

var e: TEvent;
var m: TMyEvent;

procedure Test(s: String);
begin
  WriteLn(s);
end;

e := Test;
e('alpha');
m := e;
m('beta');
e := m;
e('gamma');

{<<< RESULT - CONSOLE LOG >>>
-----------------------------
alpha
beta
gamma
-----------------------------
{<<<<<<<<< THE END >>>>>>>>>}

var TObject={
	$ClassName: "TObject",
	$Parent: null,
	ClassName: function (s) { return s.$ClassName },
	ClassType: function (s) { return s },
	ClassParent: function (s) { return s.$Parent },
	$Init: function () {},
	Create: function (s) { return s },
	Destroy: function (s) { for (var prop in s) if (s.hasOwnProperty(prop)) delete s.prop },
	Destroy$: function(s) { return s.ClassType.Destroy(s) },
	Free: function (s) { if (s!==null) s.ClassType.Destroy(s) }
}
var Exception={
	$ClassName: "Exception",
	$Parent: TObject,
	$Init: function () { FMessage="" },
	Create: function (s,Msg) { s.FMessage=Msg; return s }
}
function $New(c) { var i={ClassType:c}; c.$Init(i); return i }
function $CheckFunc(i,z) { if (i) return i; throw Exception.Create($New(Exception),"Function pointer is nil"+z); }
function WriteLn(value) {
    if (window.console) { window.console.log(value); } };
function Test(s) {
   WriteLn(s);
};
var e = null;
var m = null;

/* <<< main JS >>> */

   e = Test;
   $CheckFunc(e,"")("alpha");
   m = e;
   $CheckFunc(m,"")("beta");
   e = m;
   $CheckFunc(e,"")("gamma");