Replace old ifdef with #pragma once

templates/glue/c/01/header.tmplt

@@ -33,8 +33,7 @@
  * DO NOT EDIT THIS FILE, IT WILL BE OVERWRITTEN DURING THE BUILD
  */
 
-#ifndef __USER_CODE_H_@_UPPER:Name_@
-#define __USER_CODE_H_@_UPPER:Name_@
+#pragma once
 
 #include "dataview-uniq.h"
 
@@ -64,5 +63,3 @@ void @_LOWER:Name_@_RI_RESET_@_Timers_@();
 #ifdef __cplusplus
 }
 #endif
-
-#endif  /* __USER_CODE_H_@_UPPER:Name_@ */

templates/glue/cpp/01/header.tmplt

@@ -37,8 +37,7 @@
  * DO NOT EDIT THIS FILE, IT WILL BE OVERWRITTEN DURING THE BUILD
  */
 
-#ifndef __USER_CODE_H_@_UPPER:Name_@
-#define __USER_CODE_H_@_UPPER:Name_@
+#pragma once
 
 #include "dataview-uniq.h"
 
@@ -70,6 +69,4 @@ class @_LOWER:Name_@
 #ifdef __cplusplus
 }
 #endif
-
-#endif  /* __USER_CODE_H_@_UPPER:Name_@ */
 @@END_IF@@

templates/skeletons/c/01/header.tmplt

@@ -33,8 +33,7 @@
  * DO NOT EDIT THIS FILE, IT WILL BE OVERWRITTEN DURING THE BUILD
  */
 
-#ifndef __USER_CODE_H_@_UPPER:Name_@
-#define __USER_CODE_H_@_UPPER:Name_@
+#pragma once
 
 #include "dataview-uniq.h"
 
@@ -64,5 +63,3 @@ void @_LOWER:Name_@_RI_RESET_@_Timers_@();
 #ifdef __cplusplus
 }
 #endif
-
-#endif  /* __USER_CODE_H_@_UPPER:Name_@ */

templates/skeletons/cpp/01/header.tmplt

@@ -37,8 +37,7 @@
  * DO NOT EDIT THIS FILE, IT WILL BE OVERWRITTEN DURING THE BUILD
  */
 
-#ifndef __USER_CODE_H_@_UPPER:Name_@
-#define __USER_CODE_H_@_UPPER:Name_@
+#pragma once
 
 #include "dataview-uniq.h"
 
@@ -70,6 +69,4 @@ class @_LOWER:Name_@
 #ifdef __cplusplus
 }
 #endif
-
-#endif  /* __USER_CODE_H_@_UPPER:Name_@ */
 @@END_IF@@