WIP: Graph datahandling

This is the draft for a data handling that (optionally) forwards all calls to SerialDatahandling. All calls and data transfers get recorded for the creation of an execution graph.

Needs to be changed after the breaking changes in datahandling.

Needs a tiny change in lbmpy:

Instead of using TimeLoop(...) for time loop creation a custom function is used.

pystencils/backends/cbackend.py

@@ -353,6 +353,9 @@ class CustomSympyPrinter(CCodePrinter):
         result = super(CustomSympyPrinter, self)._print_Piecewise(expr)
         return result.replace("\n", "")
 
+    def _print_Type(self, node):
+        return str(node)
+
     def _print_Function(self, expr):
         infix_functions = {
             bitwise_xor: '^',
@@ -365,7 +368,7 @@ class CustomSympyPrinter(CCodePrinter):
             return expr.to_c(self._print)
         if isinstance(expr, reinterpret_cast_func):
             arg, data_type = expr.args
-            return "*((%s)(& %s))" % (PointerType(data_type, restrict=False), self._print(arg))
+            return "*((%s)(& %s))" % (self._print(PointerType(data_type, restrict=False)), self._print(arg))
         elif isinstance(expr, address_of):
             assert len(expr.args) == 1, "address_of must only have one argument"
             return "&(%s)" % self._print(expr.args[0])