recursions are now being catched

helpers.py

@@ -0,0 +1,45 @@
+import parsing
+
+class RecursionDecorator(object):
+    """ A decorator to detect recursions in statements """
+    def __init__(self, func):
+        self.func = func
+        self.reset()
+        self.current = None
+
+    def __call__(self, stmt, *args, **kwargs):
+        # don't check param instances, they are not causing recursions
+        if isinstance(stmt, parsing.Param):
+            return self.func(stmt, *args, **kwargs)
+
+        r = RecursionNode(stmt, self.current)
+        if self.check_recursion(r):
+            return []
+        parent, self.current = self.current, r
+        result = self.func(stmt, *args, **kwargs)
+        self.current = parent
+        return result
+
+    def check_recursion(self, new):
+        test = self.current
+        while True:
+            if new == test:
+                return True
+            if not test:
+                return False
+            test = test.parent
+
+    def reset(self):
+        self.top = None
+        self.current = None
+
+class RecursionNode(object):
+    def __init__(self, stmt, parent):
+        self.script = stmt.get_parent_until()
+        self.position = (stmt.line_nr, stmt.indent)
+        self.parent = parent
+
+    def __eq__(self, other):
+        if not other:
+            return None
+        return self.script == other.script and self.position == other.position