diff --git a/ccmeta.leg b/ccmeta.leg
index 2497bbd..8e5de37 100644
--- a/ccmeta.leg
+++ b/ccmeta.leg
@@ -2413,7 +2413,7 @@ MO_STRING       = 'string'        ![(a-zA-Z0-9_] --
 
 #--------------------------------------------- Meta rules ----------------------------------------------#
 
-META_NIL             = 'nil'      ![a-zA-Z0-9_] --  
+META_NIL             = 'nil'      ![a-zA-Z0-9_] --
 #META_FUN            = 'fun'      ![a-zA-Z0-9_] --
 #META_SYNTAX         = 'syntax'   ![a-zA-Z0-9_] --
 META_VAR             = 'var'      ![a-zA-Z0-9_] --
@@ -3640,6 +3640,8 @@ void outputNode(oop node)
         case Symbol:
             outputText(get(node, Symbol, name));
             return;
+        case Function:
+            return;
         default:
             fprintf(stderr, "\noutputNode: unknown node type %i\n", getType(node));
             abort();
diff --git a/class.mc b/class.mc
new file mode 100644
index 0000000..96a6cd8
--- /dev/null
+++ b/class.mc
@@ -0,0 +1,35 @@
+@(import("boot.mc"))
+
+@{
+
+  classCopy(class) {
+    {values: clone(class.values), functions: clone(class.functions)};
+  }
+
+  initClass(class) {
+    out = {};
+    if (class == null) {
+      out.values = {};
+      out.functions = {};
+    }
+    out;
+  }
+
+  new(class, param) {
+    k = 0;
+    out = initClass();
+    for (i in class.values) { 
+      out.values[i] = clone(param[i]);
+      k++;
+    }
+    for (i in class) {
+      if (i != keys(class)[0] ) {
+        out[i] = clone(class[i]);
+      }
+    }
+    return out;
+  }
+  
+
+  nil;
+}
\ No newline at end of file
diff --git a/tests-parsimony/testFile.c b/tests-parsimony/testFile.c
new file mode 100644
index 0000000..e46e91e
--- /dev/null
+++ b/tests-parsimony/testFile.c
@@ -0,0 +1,42 @@
+@(import("class.mc"))
+
+@{
+  //creation of the class
+  P = initClass();
+  P.values.x = "null";
+  P.values.y = "null";
+  P.values.z = "null";
+  P.functions.printf = "null";
+  printf(p) { // Can we create a self variable or somthing like that ?
+    print("Object P : ");
+    print(p);
+    print("\n");
+  }
+  P.functions.printf = printf;
+
+  // To know if the parameter is known
+  print("\n");
+  (P.values.x != null) ? print("yes\n") : print("no\n");
+  (P.values.w != null) ? print("yes\n") : print("no\n");
+  print("\n");
+
+  // Use of the P class
+  x = new(P, {x: 2, y: 4, z: 6 });
+  x.functions.printf(x);
+
+  // Create another class from P
+  Q = classCopy(P);
+  Q.values.q = "null";
+  printf(q) {
+    print("Object Q : ");
+    print(q);
+    print("\n");
+  }
+  Q.functions.printf = printf;
+
+  // Use of the Q class
+  y = new(Q, {x: 1, y: 2, z: 3, q: 42 });
+  P.functions.printf(P);
+
+  nil;
+}
\ No newline at end of file
diff --git a/tests-parsimony/testFile2.c b/tests-parsimony/testFile2.c
new file mode 100644
index 0000000..e0be8db
--- /dev/null
+++ b/tests-parsimony/testFile2.c
@@ -0,0 +1,47 @@
+@(import("class.mc"))
+
+@{
+  //creation of the object class
+  Object = initClass();
+  Object.type = "object";
+  type_t = { type_Nil: 0, type_Int: 1, type_Pair: 2};
+  printf(x) {
+    switch (x.type) {
+      case type_t.type_Int: {
+        print(x.values.value);
+        return;
+      }
+      case type_t.type_Pair: {
+        print("(");
+        printf(x.values.a);
+        print(", ");
+        printf(x.values.d);
+        print(")");
+        return;
+      }
+    }
+  }
+  Object.functions.printf = printf;
+  
+  // from object
+  Nil = classCopy(Object);
+  Nil.type = type_t.type_Nil;
+  Int = classCopy(Object);
+  Int.values.value = "null";
+  Int.type = type_t.type_Int;
+  Pair = classCopy(Object);
+  Pair.values.a = "null";
+  Pair.values.d = "null";
+  Pair.type = type_t.type_Pair;
+  
+  // function to simplify the writting of example
+  newNil(x)     { new(Nil, {}); }
+  newInt(x)     { new(Int, {value: x}); }
+  newPair(x, y) { new(Pair, { a: x, d: y }); }
+  
+  // example 
+  l = newPair(newInt(1), newPair(newInt(2), newPair(newInt(3), newNil())))
+  l.functions.printf(l);
+  
+  nil;
+}
\ No newline at end of file