wxExpr(wxExprType the_type, wxChar *word_or_string, bool allocate);
wxExpr(const wxString& functor); // Assume this is a new clause - pass functor
wxExpr(wxExprType the_type, wxChar *word_or_string, bool allocate);
wxExpr(const wxString& functor); // Assume this is a new clause - pass functor