Smallest JavaScript template engine

index.js

function TemplateEngine(html, options) {
        var re = /<%(.+?)%>/g, reExp = /(^( )?(if|for|else|switch|case|break|{|}|;))(.*)?/g, code = 'var r=[];\n', cursor = 0, result;
        var add = function(line, js) {
                js? (code += line.match(reExp) ? line + '\n' : 'r.push(this.' + line + ');\n') :
                        (code += line != '' ? 'r.push("' + line.replace(/"/g, '\\"') + '");\n' : '');
                return add;
        }
        while(match = re.exec(html)) {
                add(html.slice(cursor, match.index))(match[1], true);
                cursor = match.index + match[0].length;
        }
        add(html.substr(cursor, html.length - cursor));
        code = (code + 'return r.join("");').replace(/[\r\t\n]/g, '');
        console.log(code);
        try { result = new Function(code).apply(options); }
        catch(err) { console.error("'" + err.message + "'", " in \n\nCode:\n", code, "\n"); }
        return result;
}
function Template(html){
  return {
    'html': html,
    'render': function(options){ return TemplateEngine(this.html, options); },
    'toString': function (){ return 'Template: '+this.html; }
  }
}