/*
 String.prorotype

*/
String.prototype.isString = true;
String.prototype.x = function(l){
	for(var i=0,tmp="";i<l;i++) tmp+=this;
	return tmp;
}
String.prototype.chars = function() { return(this.split("")) }
String.prototype.toRegExp = function(){
	return new RegExp(this);
}



// 遅延評価される数値
function LazyNumber(func){
	this.toString = function(base){
		return base ? (func()).toString(base) : func()
	};
	this.isLazy = true;
}
// 遅延評価される文字列
function LazyString(func){
	this.toString = func;
	this.length = new LazyNumber(function(){return func().toString().length});
	this.isLazy = true;
}
LazyString.methods = [
	"split","substr","substring","slice","concat","toUpperCase","toLowerCase",
	"search","match","replace","charAt","length"
];
(function(){
	var m = LazyString.methods;
	var mm = function(method){
		return function(){
			var tmp = this.toString();
			return tmp[method].apply(tmp,arguments)
		}
	}
	for(var i=0;i<m.length;i++){
		LazyString.prototype[m[i]] = mm(m[i]);
	}
})();