Fix stencil include guard problem (clang17 / c++20)

src/stencil/D2CornerStencil.h

@@ -1,10 +1,10 @@
+#pragma once
+
 //====================================================================================================================
 //  Caution: This file has been generated automatically. All manual changes are lost when file is regenerated!
 //           Changes should be done in Stencil.in.h,and then all stencils classes can be generated again.
 //====================================================================================================================
 #ifndef DOXY_SKIP_INTERNAL
-#pragma once
-
 #include "Directions.h"
 #include "Iterator.h"
 

src/stencil/D2Q4.h

@@ -1,10 +1,10 @@
+#pragma once
+
 //====================================================================================================================
 //  Caution: This file has been generated automatically. All manual changes are lost when file is regenerated!
 //           Changes should be done in Stencil.in.h,and then all stencils classes can be generated again.
 //====================================================================================================================
 #ifndef DOXY_SKIP_INTERNAL
-#pragma once
-
 #include "Directions.h"
 #include "Iterator.h"
 

src/stencil/D2Q5.h

@@ -1,10 +1,10 @@
+#pragma once
+
 //====================================================================================================================
 //  Caution: This file has been generated automatically. All manual changes are lost when file is regenerated!
 //           Changes should be done in Stencil.in.h,and then all stencils classes can be generated again.
 //====================================================================================================================
 #ifndef DOXY_SKIP_INTERNAL
-#pragma once
-
 #include "Directions.h"
 #include "Iterator.h"
 

src/stencil/D2Q9.h

@@ -1,10 +1,10 @@
+#pragma once
+
 //====================================================================================================================
 //  Caution: This file has been generated automatically. All manual changes are lost when file is regenerated!
 //           Changes should be done in Stencil.in.h,and then all stencils classes can be generated again.
 //====================================================================================================================
 #ifndef DOXY_SKIP_INTERNAL
-#pragma once
-
 #include "Directions.h"
 #include "Iterator.h"
 

src/stencil/D3CornerStencil.h

@@ -1,10 +1,10 @@
+#pragma once
+
 //====================================================================================================================
 //  Caution: This file has been generated automatically. All manual changes are lost when file is regenerated!
 //           Changes should be done in Stencil.in.h,and then all stencils classes can be generated again.
 //====================================================================================================================
 #ifndef DOXY_SKIP_INTERNAL
-#pragma once
-
 #include "Directions.h"
 #include "Iterator.h"
 

src/stencil/D3EdgeCornerStencil.h

@@ -1,10 +1,10 @@
+#pragma once
+
 //====================================================================================================================
 //  Caution: This file has been generated automatically. All manual changes are lost when file is regenerated!
 //           Changes should be done in Stencil.in.h,and then all stencils classes can be generated again.
 //====================================================================================================================
 #ifndef DOXY_SKIP_INTERNAL
-#pragma once
-
 #include "Directions.h"
 #include "Iterator.h"
 

src/stencil/D3Q15.h

@@ -1,10 +1,10 @@
+#pragma once
+
 //====================================================================================================================
 //  Caution: This file has been generated automatically. All manual changes are lost when file is regenerated!
 //           Changes should be done in Stencil.in.h,and then all stencils classes can be generated again.
 //====================================================================================================================
 #ifndef DOXY_SKIP_INTERNAL
-#pragma once
-
 #include "Directions.h"
 #include "Iterator.h"
 

src/stencil/D3Q19.h

@@ -1,10 +1,10 @@
+#pragma once
+
 //====================================================================================================================
 //  Caution: This file has been generated automatically. All manual changes are lost when file is regenerated!
 //           Changes should be done in Stencil.in.h,and then all stencils classes can be generated again.
 //====================================================================================================================
 #ifndef DOXY_SKIP_INTERNAL
-#pragma once
-
 #include "Directions.h"
 #include "Iterator.h"
 

src/stencil/D3Q27.h

@@ -1,10 +1,10 @@
+#pragma once
+
 //====================================================================================================================
 //  Caution: This file has been generated automatically. All manual changes are lost when file is regenerated!
 //           Changes should be done in Stencil.in.h,and then all stencils classes can be generated again.
 //====================================================================================================================
 #ifndef DOXY_SKIP_INTERNAL
-#pragma once
-
 #include "Directions.h"
 #include "Iterator.h"
 

src/stencil/D3Q6.h

@@ -1,10 +1,10 @@
+#pragma once
+
 //====================================================================================================================
 //  Caution: This file has been generated automatically. All manual changes are lost when file is regenerated!
 //           Changes should be done in Stencil.in.h,and then all stencils classes can be generated again.
 //====================================================================================================================
 #ifndef DOXY_SKIP_INTERNAL
-#pragma once
-
 #include "Directions.h"
 #include "Iterator.h"
 

src/stencil/D3Q7.h

@@ -1,10 +1,10 @@
+#pragma once
+
 //====================================================================================================================
 //  Caution: This file has been generated automatically. All manual changes are lost when file is regenerated!
 //           Changes should be done in Stencil.in.h,and then all stencils classes can be generated again.
 //====================================================================================================================
 #ifndef DOXY_SKIP_INTERNAL
-#pragma once
-
 #include "Directions.h"
 #include "Iterator.h"
 

src/stencil/EdgeStencil.h

@@ -1,10 +1,10 @@
+#pragma once
+
 //====================================================================================================================
 //  Caution: This file has been generated automatically. All manual changes are lost when file is regenerated!
 //           Changes should be done in Stencil.in.h,and then all stencils classes can be generated again.
 //====================================================================================================================
 #ifndef DOXY_SKIP_INTERNAL
-#pragma once
-
 #include "Directions.h"
 #include "Iterator.h"
 

src/stencil/Stencil.in.h

@@ -1,5 +1,3 @@
-#pragma once
-
 #include "Directions.h"
 #include "Iterator.h"
 
@@ -83,7 +81,7 @@ namespace stencil {
          /*! \name Iteration*/
          //@{
 
-         typedef stencil::Iterator<$name> iterator;
+         using iterator = stencil::Iterator<$name>;
 
          static iterator begin()           { return iterator(0); }
          static iterator beginNoCenter()   { return iterator(noCenterFirstIdx); }
@@ -182,7 +180,7 @@ namespace stencil {
 
    } // namespace internal
 
-   typedef internal::$name<> $name;
+   using $name = internal::$name<>;
 
 } // namespace stencil
 } // namespace walberla

src/stencil/generate.py

@@ -80,7 +80,9 @@ def coordinateToDirection(coord):
     return directionStr
 
 
-header = """//====================================================================================================================
+header = """#pragma once
+
+//====================================================================================================================
 //  Caution: This file has been generated automatically. All manual changes are lost when file is regenerated!
 //           Changes should be done in Stencil.in.h,and then all stencils classes can be generated again.
 //====================================================================================================================