/***
 * An example of duck typing (a.k.a. type erasure)
 */
import "console.jsx";
interface Animal {
 function say () : void;
}
class Duck /* no need to implement AnimalConcept */ {
 function say () : void {
 console.log("quack!");
 }
}
class Dog /* no need to implement AnimalConcept */ {
 function say () : void {
 console.log("bow!");
 }
}
class _AnimalHolder.<t> implements Animal {
	var _target : T;
	function constructor (target : T) {
		this._target = target;
	}
	override function say () : void {
		this._target.say();
	}
}
class Human {
 var _animal : Animal;
 /* A human can hold any kind of object that is capable of `say`ing! */
 function hold.<t> (animal : T) : void {
 this._animal = new _AnimalHolder.<t>(animal);
 }
 function touch () : void {
 this._animal.say();
 }
}
class _Main {
 static function main(args : string[]) : void {
 var human = new Human;
 human.hold(new Duck);
 human.touch(); // => quack!
 human.hold(new Dog);
 human.touch(); // -> bow!
 }
}
// vim: set tabstop=2 shiftwidth=2 expandtab:
</div><div class="naked_ctrl">
<form action="/index.cgi/larger-text" method="get" name="gate">
<p><a href="http://altstyle.alfasado.net">AltStyle</a> によって変換されたページ <a href="http://jsx.github.io/try-on-web/source-map/type-erasure.jsx">(-&gt;オリジナル)</a>
/ <label>アドレス: <input type="text" name="naked_post_url" value="http://jsx.github.io/try-on-web/source-map/type-erasure.jsx" size="22" /></label> <label>モード: <select name="naked_post_mode">
<option value="default">デフォルト</option>
<option value="speech">音声ブラウザ</option>
<option value="ruby">ルビ付き</option>
<option value="contrast">配色反転</option>
<option value="larger-text" selected="selected">文字拡大</option>
<option value="mobile">モバイル</option>
</select>
<input type="submit" value="表示" />
</p>
</form>
</div>