1  var INTERPOLATE = /{([^{]+?)}/g
 2  
 3  module.exports = function(str, data) {
 4    var tmpl = 'var __p=[],print=function(){__p.push.apply(__p,arguments);};' +
 5      'with(obj||{}){__p.push(\'' +
 6      str.replace(/\\/g, '\\\\')
 7         .replace(/'/g, "\\'")
 8         .replace(INTERPOLATE, function(match, code) {
 9           return "'," + code.replace(/\\'/g, "'") + ",'"
10         })
11         .replace(/\r/g, '\\r')
12         .replace(/\n/g, '\\n')
13         .replace(/\t/g, '\\t')
14         + "');}return __p.join('');"
15    var func = new Function('obj', tmpl)
16    return data ? func(data) : func
17  }