学步园

var easyTemplate = function(s,d){
	if(!s){return '';}
	if(s!==easyTemplate.template){
		easyTemplate.template = s;
		easyTemplate.aStatement = easyTemplate.parsing(easyTemplate.separate(s));
	}
	var aST = easyTemplate.aStatement;
	var process = function(d2){
		if(d2){d = d2;}
		return arguments.callee;
	};
	process.toString = function(){
		return (new Function(aST[0],aST[1]))(d);
	};
	return process;
};
easyTemplate.separate = function(s){
	var r = /\\'/g;
	var sRet = s.replace(/(<(\/?)#(.*?(?:\(.*?\))*)>)|(')|([\r\n\t])|(\$\{([^\}]*?)\})/g,function(a,b,c,d,e,f,g,h){
		if(b){return '{|}'+(c?'-':'+')+d+'{|}';}
		if(e){return '\\\'';}
		if(f){return '';}
		if(g){return '\'+('+h.replace(r,'\'')+')+\'';}
	});
	return sRet;
};
easyTemplate.parsing = function(s){
	var mName,vName,sTmp,aTmp,sFL,sEl,aList,aStm = ['var aRet = [];'];
	aList = s.split(/\{\|\}/);
	var r = /\s/;
	while(aList.length){
		sTmp = aList.shift();
		if(!sTmp){continue;}
		sFL = sTmp.charAt(0);
		if(sFL!=='+'&&sFL!=='-'){
			sTmp = '\''+sTmp+'\'';aStm.push('aRet.push('+sTmp+');');
			continue;
		}
		aTmp = sTmp.split(r);
		switch(aTmp[0]){
			case '+macro':mName = aTmp[1];vName = aTmp[2];aStm.push('aRet.push("<!--'+mName+' start--\>");');break;
			case '-macro':aStm.push('aRet.push("<!--'+mName+' end--\>");');break;
			case '+if':aTmp.splice(0,1);aStm.push('if'+aTmp.join(' ')+'{');break;
			case '+elseif':aTmp.splice(0,1);aStm.push('}else if'+aTmp.join(' ')+'{');break;
			case '-if':aStm.push('}');break;
			case '+else':aStm.push('}else{');break;
			case '+list':aStm.push('if('+aTmp[1]+'.constructor === Array){with({i:0,l:'+aTmp[1]+'.length,'+aTmp[3]+'_index:0,'+aTmp[3]+':null}){for(i=l;i--;){'+aTmp[3]+'_index=(l-i-1);'+aTmp[3]+'='+aTmp[1]+'['+aTmp[3]+'_index];');break;
			case '-list':aStm.push('}}}');break;
			default:break;
		}
	}
	aStm.push('return aRet.join("");');
	if(!vName){aStm.unshift('var data = arguments[0];');}
	return [vName,aStm.join('')];
};