Refactored Node::clone().

node_factory.cpp

@@ -2,7 +2,7 @@
 
 namespace Sass {
   
-  Node_Impl* Node_Factory::alloc_Node_Impl(Node::Type type, string* file, size_t line)
+  Node_Impl* Node_Factory::alloc_Node_Impl(Node::Type type, string file, size_t line)
   {
     Node_Impl* ip = new Node_Impl();
     ip->type = type;
@@ -12,36 +12,61 @@ namespace Sass {
     return ip;
   }
 
-  Node Node_Factory::operator()(Node::Type type, string* file, size_t line, const Token& t)
+  // returns a deep-copy of its argument
+  Node_Impl* Node_Factory::alloc_Node_Impl(Node_Impl* ip)
+  {
+    Node_Impl* ip_cpy = new Node_Impl(*ip);
+    if (ip_cpy->has_children) {
+      for (size_t i = 0, S = ip_cpy->size(); i < S; ++i) {
+        Node n(ip_cpy->at(i));
+        n.ip_ = alloc_Node_Impl(n.ip_);
+      }
+    }
+    return ip_cpy;
+  }
+
+  // for cloning nodes
+  Node Node_Factory::operator()(const Node& n1)
+  {
+    Node_Impl* ip_cpy = alloc_Node_Impl(n1.ip_); // deep-copy the implementation object
+    return Node(ip_cpy);
+  }
+
+  // for making leaf nodes out of terminals/tokens
+  Node Node_Factory::operator()(Node::Type type, string file, size_t line, const Token& t)
   {
     Node_Impl* ip = alloc_Node_Impl(type, file, line);
     ip->value.token = t;
     return Node(ip);
   }
 
-  Node Node_Factory::operator()(Node::Type type, string* file, size_t line, size_t size)
+  // for making interior nodes that have children
+  Node Node_Factory::operator()(Node::Type type, string file, size_t line, size_t size)
   {
     Node_Impl* ip = alloc_Node_Impl(type, file, line);
     ip->children.reserve(size);
     return Node(ip);
   }
 
-  Node Node_Factory::operator()(string* file, size_t line, double v)
+  // for making nodes representing numbers
+  Node Node_Factory::operator()(string file, size_t line, double v)
   {
     Node_Impl* ip = alloc_Node_Impl(Node::number, file, line);
     ip->value.numeric = v;
     return Node(ip);
   }
 
-  Node Node_Factory::operator()(string* file, size_t line, double v, const Token& t)
+  // for making nodes representing numeric dimensions (e.g. 5px, 3em)
+  Node Node_Factory::operator()(string file, size_t line, double v, const Token& t)
   {
     Node_Impl* ip = alloc_Node_Impl(Node::numeric_dimension, file, line);
     ip->value.dimension.numeric = v;
     ip->value.dimension.unit = t;
     return Node(ip);
   }
-    
-  Node Node_Factory::operator()(string* file, size_t line, double r, double g, double b, double a)
+  
+  // for making nodes representing rgba color quads
+  Node Node_Factory::operator()(string file, size_t line, double r, double g, double b, double a)
   {
     Node color((*this)(Node::numeric_color, file, line, 4));
     color << (*this)(file, line, r)
@@ -51,4 +76,7 @@ namespace Sass {
     return color;
   }
 
+  void Node_Factory::free()
+  { for (size_t i = 0, S = pool_.size(); i < S; ++i) delete pool_[i]; }
+
 }
\ No newline at end of file

node_factory.hpp

@@ -12,13 +12,24 @@ namespace Sass {
   
   class Node_Factory {
     vector<Node_Impl*> pool_;
-    Node_Impl* alloc_Node_Impl(Node::Type type, string* file, size_t line);
+    Node_Impl* alloc_Node_Impl(Node::Type type, string file, size_t line);
+    // returns a deep-copy of its argument
+    Node_Impl* alloc_Node_Impl(Node_Impl* ip);
   public:
-    Node operator()(Node::Type type, string* file, size_t line, const Token& t);
-    Node operator()(Node::Type type, string* file, size_t line, size_t size);
-    Node operator()(string* file, size_t line, double v);
-    Node operator()(string* file, size_t line, double v, const Token& t);
-    Node operator()(string* file, size_t line, double r, double g, double b, double a = 1.0);
+    // for cloning nodes
+    Node operator()(const Node& n1);
+    // for making leaf nodes out of terminals/tokens
+    Node operator()(Node::Type type, string file, size_t line, const Token& t);
+    // for making interior nodes that have children
+    Node operator()(Node::Type type, string file, size_t line, size_t size);
+    // for making nodes representing numbers
+    Node operator()(string file, size_t line, double v);
+    // for making nodes representing numeric dimensions (e.g. 5px, 3em)
+    Node operator()(string file, size_t line, double v, const Token& t);
+    // for making nodes representing rgba color quads
+    Node operator()(string file, size_t line, double r, double g, double b, double a = 1.0);
+
+    void free();
   };
   
 }
\ No newline at end of file

test_node_factory.cpp

@@ -17,15 +17,15 @@ int main()
   
   Node_Factory new_Node = Node_Factory();
   
-  Node interior(new_Node(Node::block, 0, 0, 3));
+  Node interior(new_Node(Node::block, "", 0, 3));
   
   cout << interior.size() << endl;
   cout << interior.has_children() << endl;
   cout << interior.should_eval() << endl << endl;
   
-  Node num(new_Node(0, 0, 255, 123, 32));
-  Node num2(new_Node(0, 0, 255, 123, 32));
-  Node num3(new_Node(0, 0, 255, 122, 20, .75));
+  Node num(new_Node("", 0, 255, 123, 32));
+  Node num2(new_Node("", 0, 255, 123, 32));
+  Node num3(new_Node("", 0, 255, 122, 20, .75));
   
   cout << num.size() << endl;
   cout << num.has_children() << endl;
@@ -42,6 +42,15 @@ int main()
   
   cout << (num2[2] >= num3[2]) << endl;
   cout << (num2[3] != num3[3]) << endl << endl;
+
+  Node num4(new_Node(num3));
+  cout << num3[3].numeric_value() << endl;
+  cout << num4[3].numeric_value() << endl;
+  num4[3] = new_Node("", 0, 0.4567);
+  cout << num3[3].numeric_value() << endl;
+  cout << num4[3].numeric_value() << endl;
+
+  new_Node.free();
   
   return 0;
 }
\ No newline at end of file