added parser_scope global, added local assignments and local declarations to parser, reworked Scope class to use get(), putLocal(), and putGlobal() methods

git-svn-id: svn://anubis/fart/branches/scene-file-scripting@329 7f9b0f55-74a9-4bce-be96-3c2cd072584d

util/Scope.h

@@ -23,7 +23,7 @@ class Scope
             }
             return false;
         }
-        double & operator[](const std::string & key)
+        double get(const std::string & key)
         {
             for (m_list_type::reverse_iterator it = m_list.rbegin();
                  it != m_list.rend();
@@ -34,7 +34,25 @@ class Scope
                     return (*it)[key];
                 }
             }
-            return (*m_list.rbegin())[key];
+            return 0.0;
+        }
+        void putLocal(const std::string & key, double val)
+        {
+            (*m_list.rbegin())[key] = val;
+        }
+        void putGlobal(const std::string & key, double val)
+        {
+            for (m_list_type::reverse_iterator it = m_list.rbegin();
+                 it != m_list.rend();
+                 it++)
+            {
+                if (it->find(key) != it->end())
+                {
+                    (*it)[key] = val;
+                    return;
+                }
+            }
+            putLocal(key, val);
         }
         void push()
         {