diff --git a/lib/parser/transform.rb b/lib/parser/transform.rb
index fb81eca..3300c94 100644
--- a/lib/parser/transform.rb
+++ b/lib/parser/transform.rb
@@ -95,10 +95,11 @@ module Parser
     #modules and classes are understandibly quite similar   Class < Module
     rule( :module_name => simple(:module_name) , :derived_name => simple(:derived_name) , :class_expressions => sequence(:class_expressions) , :end=>"end") do
       s(:class , module_name.to_s.to_sym ,
-          s(:derives, derived_name ? derived_name.to_a.first.to_sym : nil) , *class_expressions)
+          s(:derives, derived_name ? derived_name.to_a.first.to_sym : nil) ,
+            s(:expressions, *class_expressions) )
     end
     rule( :module_name => simple(:module_name) , :module_expressions => sequence(:module_expressions) , :end=>"end") do
-      s(:module , module_name.to_s.to_sym , *module_expressions)
+      s(:module , module_name.to_s.to_sym , s(:expressions, *module_expressions))
     end
 
     rule(:expression_list => sequence(:expression_list)) {
diff --git a/test/cases/class_def/big_class.tst b/test/cases/class_def/big_class.tst
index 43a7375..1b8d024 100644
--- a/test/cases/class_def/big_class.tst
+++ b/test/cases/class_def/big_class.tst
@@ -35,126 +35,127 @@ end
 s(:expressions,
   s(:class, :String,
     s(:derives, nil),
-    s(:function, :ref,
-      s(:name, :new_string),
-      s(:parameters,
-        s(:parameter, :int, :len)),
-      s(:expressions,
-        s(:assign,
-          s(:name, :len),
-          s(:operator, "<<",
+    s(:expressions,
+      s(:function, :ref,
+        s(:name, :new_string),
+        s(:parameters,
+          s(:parameter, :int, :len)),
+        s(:expressions,
+          s(:assign,
             s(:name, :len),
-            s(:int, 2))),
-        s(:return,
-          s(:call,
-            s(:name, :new_object),
-            s(:arguments,
-              s(:name, :len)),
-            s(:receiver,
-              s(:name, :super))))),
-      s(:receiver, :self)),
-    s(:function, :int,
-      s(:name, :length),
-      s(:parameters),
-      s(:expressions,
-        s(:return,
-          s(:field_access,
-            s(:receiver,
-              s(:name, :self)),
-            s(:field,
-              s(:name, :length)))))),
-    s(:function, :int,
-      s(:name, :plus),
-      s(:parameters,
-        s(:parameter, :ref, :str)),
-      s(:expressions,
-        s(:assign,
-          s(:name, :my_length),
-          s(:field_access,
-            s(:receiver,
-              s(:name, :self)),
-            s(:field,
-              s(:name, :length)))),
-        s(:assign,
-          s(:name, :str_len),
-          s(:call,
-            s(:name, :length),
-            s(:arguments),
-            s(:receiver,
-              s(:name, :str)))),
-        s(:assign,
-          s(:name, :my_length),
-          s(:operator, "+",
-            s(:name, :str_len),
-            s(:name, :my_length))),
-        s(:assign,
-          s(:name, :new_string),
-          s(:call,
-            s(:name, :new_string),
-            s(:arguments,
-              s(:name, :my_length)),
-            s(:receiver,
-              s(:name, :self)))),
-        s(:assign,
-          s(:name, :i),
-          s(:int, 0)),
-        s(:while,
-          s(:condition,
-            s(:operator, "<",
-              s(:name, :i),
-              s(:name, :my_length))),
-          s(:expressions,
-            s(:assign,
-              s(:name, :char),
-              s(:call,
-                s(:name, :get),
-                s(:arguments,
-                  s(:name, :i)))),
-            s(:call,
-              s(:name, :set),
-              s(:arguments,
-                s(:name, :i),
-                s(:name, :char)),
-              s(:receiver,
-                s(:name, :new_string))),
-            s(:assign,
-              s(:name, :i),
-              s(:operator, "+",
-                s(:name, :i),
-                s(:int, 1))))),
-        s(:assign,
-          s(:name, :i),
-          s(:int, 0)),
-        s(:while,
-          s(:condition,
-            s(:operator, "<",
-              s(:name, :i),
-              s(:name, :str_len))),
-          s(:expressions,
-            s(:assign,
-              s(:name, :char),
-              s(:call,
-                s(:name, :get),
-                s(:arguments,
-                  s(:name, :i)),
-                s(:receiver,
-                  s(:name, :str)))),
-            s(:assign,
+            s(:operator, "<<",
               s(:name, :len),
-              s(:operator, "+",
+              s(:int, 2))),
+          s(:return,
+            s(:call,
+              s(:name, :new_object),
+              s(:arguments,
+                s(:name, :len)),
+              s(:receiver,
+                s(:name, :super))))),
+        s(:receiver, :self)),
+      s(:function, :int,
+        s(:name, :length),
+        s(:parameters),
+        s(:expressions,
+          s(:return,
+            s(:field_access,
+              s(:receiver,
+                s(:name, :self)),
+              s(:field,
+                s(:name, :length)))))),
+      s(:function, :int,
+        s(:name, :plus),
+        s(:parameters,
+          s(:parameter, :ref, :str)),
+        s(:expressions,
+          s(:assign,
+            s(:name, :my_length),
+            s(:field_access,
+              s(:receiver,
+                s(:name, :self)),
+              s(:field,
+                s(:name, :length)))),
+          s(:assign,
+            s(:name, :str_len),
+            s(:call,
+              s(:name, :length),
+              s(:arguments),
+              s(:receiver,
+                s(:name, :str)))),
+          s(:assign,
+            s(:name, :my_length),
+            s(:operator, "+",
+              s(:name, :str_len),
+              s(:name, :my_length))),
+          s(:assign,
+            s(:name, :new_string),
+            s(:call,
+              s(:name, :new_string),
+              s(:arguments,
+                s(:name, :my_length)),
+              s(:receiver,
+                s(:name, :self)))),
+          s(:assign,
+            s(:name, :i),
+            s(:int, 0)),
+          s(:while,
+            s(:condition,
+              s(:operator, "<",
                 s(:name, :i),
                 s(:name, :my_length))),
-            s(:call,
-              s(:name, :set),
-              s(:arguments,
-                s(:name, :len),
-                s(:name, :char)),
-              s(:receiver,
-                s(:name, :new_string))),
-            s(:assign,
-              s(:name, :i),
-              s(:operator, "+",
+            s(:expressions,
+              s(:assign,
+                s(:name, :char),
+                s(:call,
+                  s(:name, :get),
+                  s(:arguments,
+                    s(:name, :i)))),
+              s(:call,
+                s(:name, :set),
+                s(:arguments,
+                  s(:name, :i),
+                  s(:name, :char)),
+                s(:receiver,
+                  s(:name, :new_string))),
+              s(:assign,
                 s(:name, :i),
-                s(:int, 1))))),
-        s(:return,
-          s(:name, :new_string))))))
+                s(:operator, "+",
+                  s(:name, :i),
+                  s(:int, 1))))),
+          s(:assign,
+            s(:name, :i),
+            s(:int, 0)),
+          s(:while,
+            s(:condition,
+              s(:operator, "<",
+                s(:name, :i),
+                s(:name, :str_len))),
+            s(:expressions,
+              s(:assign,
+                s(:name, :char),
+                s(:call,
+                  s(:name, :get),
+                  s(:arguments,
+                    s(:name, :i)),
+                  s(:receiver,
+                    s(:name, :str)))),
+              s(:assign,
+                s(:name, :len),
+                s(:operator, "+",
+                  s(:name, :i),
+                  s(:name, :my_length))),
+              s(:call,
+                s(:name, :set),
+                s(:arguments,
+                  s(:name, :len),
+                  s(:name, :char)),
+                s(:receiver,
+                  s(:name, :new_string))),
+              s(:assign,
+                s(:name, :i),
+                s(:operator, "+",
+                  s(:name, :i),
+                  s(:int, 1))))),
+          s(:return,
+            s(:name, :new_string)))))))
diff --git a/test/cases/class_def/class_derived.tst b/test/cases/class_def/class_derived.tst
index fedd805..c838ec6 100644
--- a/test/cases/class_def/class_derived.tst
+++ b/test/cases/class_def/class_derived.tst
@@ -9,20 +9,21 @@ end
 s(:expressions,
   s(:class, :Foo,
     s(:derives, :Object),
-    s(:field_def, :int, :field,
-      s(:int, 3)),
-    s(:function, :int,
-      s(:name, :func),
-      s(:parameters),
-      s(:expressions,
-        s(:return,
-          s(:field_access,
-            s(:receiver,
-              s(:name, :self)),
-            s(:field,
-              s(:name, :field)))))),
-    s(:call,
-      s(:name, :ofthen),
-      s(:arguments,
-        s(:int, 3),
-        s(:name, :var)))))
+    s(:expressions,
+      s(:field_def, :int, :field,
+        s(:int, 3)),
+      s(:function, :int,
+        s(:name, :func),
+        s(:parameters),
+        s(:expressions,
+          s(:return,
+            s(:field_access,
+              s(:receiver,
+                s(:name, :self)),
+              s(:field,
+                s(:name, :field)))))),
+      s(:call,
+        s(:name, :ofthen),
+        s(:arguments,
+          s(:int, 3),
+          s(:name, :var))))))
diff --git a/test/cases/class_def/class_function.tst b/test/cases/class_def/class_function.tst
index 54d8dd9..0a4732e 100644
--- a/test/cases/class_def/class_function.tst
+++ b/test/cases/class_def/class_function.tst
@@ -10,26 +10,27 @@ end
 s(:expressions,
   s(:class, :Pifi,
     s(:derives, nil),
-    s(:call,
-      s(:name, :ofthen),
-      s(:arguments,
-        s(:int, 3),
-        s(:name, :var))),
-    s(:function, :int,
-      s(:name, :ofthen),
-      s(:parameters,
-        s(:parameter, :int, :n),
-        s(:parameter, :ref, :m)),
-      s(:expressions,
-        s(:assign,
-          s(:name, :n),
-          s(:operator, "+",
+    s(:expressions,
+      s(:call,
+        s(:name, :ofthen),
+        s(:arguments,
+          s(:int, 3),
+          s(:name, :var))),
+      s(:function, :int,
+        s(:name, :ofthen),
+        s(:parameters,
+          s(:parameter, :int, :n),
+          s(:parameter, :ref, :m)),
+        s(:expressions,
+          s(:assign,
             s(:name, :n),
-            s(:field_access,
-              s(:receiver,
-                s(:name, :m)),
-              s(:field,
-                s(:name, :index))))),
-        s(:return,
-          s(:name, :n))),
-      s(:receiver, :self))))
+            s(:operator, "+",
+              s(:name, :n),
+              s(:field_access,
+                s(:receiver,
+                  s(:name, :m)),
+                s(:field,
+                  s(:name, :index))))),
+          s(:return,
+            s(:name, :n))),
+        s(:receiver, :self)))))
diff --git a/test/cases/class_def/class_if.tst b/test/cases/class_def/class_if.tst
index 9654ce4..76bd86d 100644
--- a/test/cases/class_def/class_if.tst
+++ b/test/cases/class_def/class_if.tst
@@ -11,19 +11,20 @@ end
 s(:expressions,
   s(:class, :Ifi,
     s(:derives, nil),
-    s(:function, :int,
-      s(:name, :ofthen),
-      s(:parameters,
-        s(:parameter, :int, :n)),
-      s(:expressions,
-        s(:if,
-          s(:condition,
-            s(:int, 0)),
-          s(:if_true,
-            s(:assign,
-              s(:name, :isit),
-              s(:int, 42))),
-          s(:if_false,
-            s(:assign,
-              s(:name, :maybenot),
-              s(:int, 667))))))))
+    s(:expressions,
+      s(:function, :int,
+        s(:name, :ofthen),
+        s(:parameters,
+          s(:parameter, :int, :n)),
+        s(:expressions,
+          s(:if,
+            s(:condition,
+              s(:int, 0)),
+            s(:if_true,
+              s(:assign,
+                s(:name, :isit),
+                s(:int, 42))),
+            s(:if_false,
+              s(:assign,
+                s(:name, :maybenot),
+                s(:int, 667)))))))))
diff --git a/test/cases/class_def/class_method.tst b/test/cases/class_def/class_method.tst
index 920a890..243b8d3 100644
--- a/test/cases/class_def/class_method.tst
+++ b/test/cases/class_def/class_method.tst
@@ -5,10 +5,11 @@ class Foo < Object
 end
 -- -- --
 s(:expressions,
-  s(:class,  :Foo,
-    s(:derives,  :Object),
-    s(:function,  :int,
-      s(:name,  :test),
-      s(:parameters),
-      s(:expressions,
-        s(:int,  43)))))
+  s(:class, :Foo,
+    s(:derives, :Object),
+    s(:expressions,
+      s(:function, :int,
+        s(:name, :test),
+        s(:parameters),
+        s(:expressions,
+          s(:int, 43))))))
diff --git a/test/cases/class_def/class_module.tst b/test/cases/class_def/class_module.tst
index b2c41c6..ff9741b 100644
--- a/test/cases/class_def/class_module.tst
+++ b/test/cases/class_def/class_module.tst
@@ -4,12 +4,14 @@ class Foo
   end
 end
 -- -- --
-s(:expressions, 
-  s(:class,  :Foo, 
-    s(:derives,  nil), 
-    s(:module,  :Boo, 
-      s(:call, 
-        s(:name,  :funcall), 
-        s(:arguments, 
-          s(:int,  3), 
-          s(:name,  :var))))))
+s(:expressions,
+  s(:class, :Foo,
+    s(:derives, nil),
+    s(:expressions,
+      s(:module, :Boo,
+        s(:expressions,
+          s(:call,
+            s(:name, :funcall),
+            s(:arguments,
+              s(:int, 3),
+              s(:name, :var))))))))
diff --git a/test/cases/class_def/class_ops.tst b/test/cases/class_def/class_ops.tst
index afc800a..bcae6f7 100644
--- a/test/cases/class_def/class_ops.tst
+++ b/test/cases/class_def/class_ops.tst
@@ -8,13 +8,14 @@ end
 s(:expressions,
   s(:class, :Opers,
     s(:derives, nil),
-    s(:function, :int,
-      s(:name, :foo),
-      s(:parameters,
-        s(:parameter, :int, :x)),
-      s(:expressions,
-        s(:field_def, :int, :abba,
-          s(:int, 5)),
-        s(:operator, "+",
-          s(:name, :abba),
-          s(:int, 5))))))
+    s(:expressions,
+      s(:function, :int,
+        s(:name, :foo),
+        s(:parameters,
+          s(:parameter, :int, :x)),
+        s(:expressions,
+          s(:field_def, :int, :abba,
+            s(:int, 5)),
+          s(:operator, "+",
+            s(:name, :abba),
+            s(:int, 5)))))))
diff --git a/test/cases/class_def/simplest_class.tst b/test/cases/class_def/simplest_class.tst
index 558dc2c..f5674e6 100644
--- a/test/cases/class_def/simplest_class.tst
+++ b/test/cases/class_def/simplest_class.tst
@@ -2,7 +2,8 @@ class Foo
   5
 end
 -- -- --
-s(:expressions, 
-  s(:class,  :Foo, 
-    s(:derives,  nil), 
-    s(:int,  5)))
+s(:expressions,
+  s(:class, :Foo,
+    s(:derives, nil),
+    s(:expressions,
+      s(:int, 5))))
diff --git a/test/cases/module_def/module_assign_var.tst b/test/cases/module_def/module_assign_var.tst
index 4e3bc5c..a96f9c9 100644
--- a/test/cases/module_def/module_assign_var.tst
+++ b/test/cases/module_def/module_assign_var.tst
@@ -2,8 +2,9 @@ module Opers
   abba = 5
 end
 -- -- --
-s(:expressions, 
-  s(:module,  :Opers, 
-    s(:assign, 
-      s(:name,  :abba), 
-      s(:int,  5))))
+s(:expressions,
+  s(:module, :Opers,
+    s(:expressions,
+      s(:assign,
+        s(:name, :abba),
+        s(:int, 5)))))
diff --git a/test/cases/module_def/module_class.tst b/test/cases/module_def/module_class.tst
index 3c5f155..baf8896 100644
--- a/test/cases/module_def/module_class.tst
+++ b/test/cases/module_def/module_class.tst
@@ -4,12 +4,14 @@ module Foo
   end
 end
 -- -- --
-s(:expressions, 
-  s(:module,  :Foo, 
-    s(:class,  :Bar, 
-      s(:derives,  nil), 
-      s(:call, 
-        s(:name,  :funcall), 
-        s(:arguments, 
-          s(:int,  3), 
-          s(:name,  :var))))))
+s(:expressions,
+  s(:module, :Foo,
+    s(:expressions,
+      s(:class, :Bar,
+        s(:derives, nil),
+        s(:expressions,
+          s(:call,
+            s(:name, :funcall),
+            s(:arguments,
+              s(:int, 3),
+              s(:name, :var))))))))
diff --git a/test/cases/module_def/module_function.tst b/test/cases/module_def/module_function.tst
index d1305d5..dcdbf79 100644
--- a/test/cases/module_def/module_function.tst
+++ b/test/cases/module_def/module_function.tst
@@ -7,16 +7,17 @@ end
 -- -- --
 s(:expressions,
   s(:module, :Soho,
-    s(:call,
-      s(:name, :ofthen),
-      s(:arguments,
-        s(:int, 3),
-        s(:name, :var))),
-    s(:function, :int,
-      s(:name, :ofthen),
-      s(:parameters,
-        s(:parameter, :int, :n),
-        s(:parameter, :ref, :m)),
-      s(:expressions,
-        s(:return,
-          s(:int, 44))))))
+    s(:expressions,
+      s(:call,
+        s(:name, :ofthen),
+        s(:arguments,
+          s(:int, 3),
+          s(:name, :var))),
+      s(:function, :int,
+        s(:name, :ofthen),
+        s(:parameters,
+          s(:parameter, :int, :n),
+          s(:parameter, :ref, :m)),
+        s(:expressions,
+          s(:return,
+            s(:int, 44)))))))
diff --git a/test/cases/module_def/module_if.tst b/test/cases/module_def/module_if.tst
index 800cf0b..9c09ca4 100644
--- a/test/cases/module_def/module_if.tst
+++ b/test/cases/module_def/module_if.tst
@@ -10,19 +10,20 @@ end
 -- -- --
 s(:expressions,
   s(:module, :Foo,
-    s(:function, :ref,
-      s(:name, :ofthen),
-      s(:parameters,
-        s(:parameter, :int, :n)),
-      s(:expressions,
-        s(:if,
-          s(:condition,
-            s(:int, 0)),
-          s(:if_true,
-            s(:assign,
-              s(:name, :isit),
-              s(:int, 42))),
-          s(:if_false,
-            s(:assign,
-              s(:name, :maybenot),
-              s(:int, 667))))))))
+    s(:expressions,
+      s(:function, :ref,
+        s(:name, :ofthen),
+        s(:parameters,
+          s(:parameter, :int, :n)),
+        s(:expressions,
+          s(:if,
+            s(:condition,
+              s(:int, 0)),
+            s(:if_true,
+              s(:assign,
+                s(:name, :isit),
+                s(:int, 42))),
+            s(:if_false,
+              s(:assign,
+                s(:name, :maybenot),
+                s(:int, 667)))))))))
diff --git a/test/cases/module_def/module_ops.tst b/test/cases/module_def/module_ops.tst
index fa79b14..3eee683 100644
--- a/test/cases/module_def/module_ops.tst
+++ b/test/cases/module_def/module_ops.tst
@@ -7,18 +7,19 @@ end
 -- -- --
 s(:expressions,
   s(:module, :Opers,
-    s(:function, :int,
-      s(:name, :foo),
-      s(:parameters,
-        s(:parameter, :int, :x)),
-      s(:expressions,
-        s(:field_def, :int, :abba,
-          s(:field_access,
-            s(:receiver,
-              s(:name, :self)),
-            s(:field,
-              s(:name, :index)))),
-        s(:return,
-          s(:operator, "+",
-            s(:name, :abba),
-            s(:int, 5)))))))
+    s(:expressions,
+      s(:function, :int,
+        s(:name, :foo),
+        s(:parameters,
+          s(:parameter, :int, :x)),
+        s(:expressions,
+          s(:field_def, :int, :abba,
+            s(:field_access,
+              s(:receiver,
+                s(:name, :self)),
+              s(:field,
+                s(:name, :index)))),
+          s(:return,
+            s(:operator, "+",
+              s(:name, :abba),
+              s(:int, 5))))))))
diff --git a/test/cases/module_def/simplest_module.tst b/test/cases/module_def/simplest_module.tst
index 8144b6e..db6b3b7 100644
--- a/test/cases/module_def/simplest_module.tst
+++ b/test/cases/module_def/simplest_module.tst
@@ -2,6 +2,7 @@ module Simple
   5
 end
 -- -- --
-s(:expressions, 
-  s(:module,  :Simple, 
-    s(:int,  5)))
+s(:expressions,
+  s(:module, :Simple,
+    s(:expressions,
+      s(:int, 5))))
diff --git a/test/cases/root/class_method.tst b/test/cases/root/class_method.tst
index 82d617f..7f84f14 100644
--- a/test/cases/root/class_method.tst
+++ b/test/cases/root/class_method.tst
@@ -3,12 +3,13 @@ class FooBo
 end
 
 -- -- --
-s(:expressions, 
-  s(:class,  :FooBo, 
-    s(:derives,  nil), 
-    s(:call, 
-      s(:name,  :call), 
-      s(:arguments, 
-        s(:int,  35)), 
-      s(:receiver, 
-        s(:module,  "Bar")))))
+s(:expressions,
+  s(:class, :FooBo,
+    s(:derives, nil),
+    s(:expressions,
+      s(:call,
+        s(:name, :call),
+        s(:arguments,
+          s(:int, 35)),
+        s(:receiver,
+          s(:module, "Bar"))))))
diff --git a/test/cases/root/module_assignment.tst b/test/cases/root/module_assignment.tst
index cc0eb13..2120606 100644
--- a/test/cases/root/module_assignment.tst
+++ b/test/cases/root/module_assignment.tst
@@ -4,16 +4,17 @@ module Fibo
 end
 
 -- -- --
-s(:expressions, 
-  s(:module,  :Fibo, 
-    s(:assign, 
-      s(:name,  :a), 
-      s(:operator,  "+", 
-        s(:int,  5), 
-        s(:name,  :foo))), 
-    s(:call, 
-      s(:name,  :bar), 
-      s(:arguments, 
-        s(:name,  :b), 
-        s(:name,  :a), 
-        s(:name,  :r)))))
+s(:expressions,
+  s(:module, :Fibo,
+    s(:expressions,
+      s(:assign,
+        s(:name, :a),
+        s(:operator, "+",
+          s(:int, 5),
+          s(:name, :foo))),
+      s(:call,
+        s(:name, :bar),
+        s(:arguments,
+          s(:name, :b),
+          s(:name, :a),
+          s(:name, :r))))))
diff --git a/test/cases/root/module_method.tst b/test/cases/root/module_method.tst
index 1e67132..12771f5 100644
--- a/test/cases/root/module_method.tst
+++ b/test/cases/root/module_method.tst
@@ -10,16 +10,17 @@ end
 -- -- --
 s(:expressions,
   s(:module, :Fibo,
-    s(:function, :int,
-      s(:name, :fibonaccit),
-      s(:parameters,
-        s(:parameter, :int, :n)),
-      s(:expressions,
-        s(:field_def, :int, :a,
-          s(:int, 0)),
-        s(:return,
-          s(:name, :a)))),
-    s(:call,
-      s(:name, :fibonaccit),
-      s(:arguments,
-        s(:int, 10)))))
+    s(:expressions,
+      s(:function, :int,
+        s(:name, :fibonaccit),
+        s(:parameters,
+          s(:parameter, :int, :n)),
+        s(:expressions,
+          s(:field_def, :int, :a,
+            s(:int, 0)),
+          s(:return,
+            s(:name, :a)))),
+      s(:call,
+        s(:name, :fibonaccit),
+        s(:arguments,
+          s(:int, 10))))))
diff --git a/test/cases/root/root_module_class.tst b/test/cases/root/root_module_class.tst
index 895df46..34ef8f1 100644
--- a/test/cases/root/root_module_class.tst
+++ b/test/cases/root/root_module_class.tst
@@ -5,12 +5,14 @@ module FooBo
 end
 
 -- -- --
-s(:expressions, 
-  s(:module,  :FooBo, 
-    s(:class,  :Bar, 
-      s(:derives,  nil), 
-      s(:assign, 
-        s(:name,  :a), 
-        s(:operator,  "+", 
-          s(:int,  5), 
-          s(:name,  :foo))))))
+s(:expressions,
+  s(:module, :FooBo,
+    s(:expressions,
+      s(:class, :Bar,
+        s(:derives, nil),
+        s(:expressions,
+          s(:assign,
+            s(:name, :a),
+            s(:operator, "+",
+              s(:int, 5),
+              s(:name, :foo))))))))