JavaScriptでSXMLを使う(__noSuchMethod__)

neat sxmlを、JavaScriptでやってみようとした。

with({__noSuchMethod__:function(){}}){
  x(); // ReferenceError: x is not defined
}

がうまくいかなかったので、見た目が汚い。

function sxml2dom(list) {
  var tagName = list[0],
  childs = list.slice(1);
  var elem = document.createElement(tagName);
  for (var i = 0;i < childs.length;i++) {
    for (var j = 0;j < childs[i].length;j++) {
      var child = childs[i][j];
      if (child[0][0] == "$"){
	    var str = child[0].slice(1);
		var prop = str == "className" ?
			"class" :
			str.replace(/[A-Z]/g,function(c) "-" + c.toLowerCase());
        elem.setAttribute(prop, child[1]);
      } else {
        if (typeof child == "string")
          elem.appendChild(document.createTextNode(child));
        else
          elem.appendChild(sxml2dom(child));
      }
    }
  }
  return elem;
}
var _ = {
  __noSuchMethod__: function(id, args)
    [id, args]
};


sxml2dom(
  _.html(
    _.head(_.title("x")),
    _.body(_.$id("wrapper"),
      _.div(_.$className("content"),
        _.a(_.$style("color:blue"),
            _.$href("http://google.co.jp/"),
            "Google")))));

sxml2dom(
  _.head(
    _.meta(_.$httpEnv("Content-Type"),
           _.$content("text/css"))
  )
);