Merge pull request #1652 from ksky521/master

解决code中存在类似swig语法被错误解析的问题

Author: Xuanwo

lib/extend/tag.js

@@ -44,18 +44,30 @@ Tag.prototype.register = function(name, fn, options) {
   this.env.addExtension(name, tag);
 };
 
+var placeholder = '\uFFFC';
+var rPlaceholder = /(?:<|&lt;)\!--\uFFFC(\d+)--(?:>|&gt;)/g;
+
 Tag.prototype.render = function(str, options, callback) {
   if (!callback && typeof options === 'function') {
     callback = options;
     options = {};
   }
 
+  var cache = [];
+
+  function escapeContent(str) {
+    return '<!--' + placeholder + (cache.push(str) - 1) + '-->';
+  }
+
   var env = this.env;
 
   return new Promise(function(resolve, reject) {
+    str = str.replace(/<pre><code.*>[\s\S]*?<\/code><\/pre>/gm, escapeContent);
     env.renderString(str, options, function(err, result) {
       if (err) return reject(err);
-      resolve(result);
+      resolve(result.replace(rPlaceholder, function() {
+        return cache[arguments[1]];
+      }));
     });
   });
 };