use a list instead of a vector for list Nodes

src/Node.cc

@@ -7,7 +7,7 @@ Node::Node(int _type)
     switch (type)
     {
     case NODE_TYPE_LIST:
-        list = new std::vector<Node *>();
+        list = new std::list<Node *>();
         break;
     }
     declarator_name = nullptr;

src/Node.h

@@ -2,7 +2,7 @@
 #define NODE_H
 
 #include <string>
-#include <vector>
+#include <list>
 
 class Node
 {
@@ -18,7 +18,7 @@ public:
             size_t line;
             std::string * text;
         } token;
-        std::vector<Node *> * list;
+        std::list<Node *> * list;
     };
     std::string * declarator_name;
 };