include optional

Author: JSchoeberl

comp/postproc.cpp

@@ -9,6 +9,8 @@
 */
 
 #include <comp.hpp>
+#include <variant>
+#include <optional>
 
 namespace ngcomp
 { 
@@ -1228,7 +1230,6 @@ namespace ngcomp
 
 
 
-#include <variant>
 #include "../fem/integratorcf.hpp"
 
 namespace ngfem

fem/python_fem.cpp

@@ -893,7 +893,8 @@ cf : ngsolve.CoefficientFunction
           "Evaluate on other element, as needed for DG jumps")
 
     .def ("Derive", &CoefficientFunction::Derive,
-          "Compute derivative with respect to argument")
+          "Compute directional derivative with respect to variable",
+          py::arg("variable"), py::arg("direction")=1.0)
 
     // it's using the complex functions anyway ...
     // it seems to take the double-version now