(1) Added: Delete Struct; (2) Added: Structures in PrintParserSymbols

Parser/Gmsh.y

@@ -2839,6 +2839,10 @@ Delete :
 #endif
       Free($2); Free($3);
     }
+  | tDelete tDefineStruct tEND
+    {
+      nameSpaces.clear();
+    }
 ;
 
 //  C O L O R I F Y
@@ -6225,6 +6229,16 @@ void PrintParserSymbols(bool help, std::vector<std::string> &vec)
       vec.push_back(s);
     }
   }
+  if (nameSpaces.size()){
+    if(help){
+      vec.push_back("//");
+      vec.push_back("// Structures");
+      vec.push_back("//");
+    }
+    std::string s;
+    nameSpaces.sprint(s);
+    vec.push_back(s);
+  }
 }
 
 fullMatrix<double> ListOfListOfDouble2Matrix(List_T *list)

Parser/Parser.h

@@ -139,6 +139,7 @@ public:
   inline const std::map<K, T> & get() const { return _map; }
   inline int count (const std::string key) const { return _map.count(key); }
   inline int size () const { return _map.size(); }
+  void clear() { _map.clear(); }
 
 public:
   std::map<K, T> _map;