util, io, net, ...: use "#pragma once"

src/lib/dbus/Connection.hxx

@@ -2,8 +2,7 @@
 // Copyright CM4all GmbH
 // author: Max Kellermann <mk@cm4all.com>
 
-#ifndef ODBUS_CONNECTION_HXX
-#define ODBUS_CONNECTION_HXX
+#pragma once
 
 #include <dbus/dbus.h>
 
@@ -61,5 +60,3 @@ public:
 };
 
 } /* namespace ODBus */
-
-#endif

src/lib/dbus/Iter.hxx

@@ -2,8 +2,7 @@
 // Copyright CM4all GmbH
 // author: Max Kellermann <mk@cm4all.com>
 
-#ifndef ODBUS_ITER_HXX
-#define ODBUS_ITER_HXX
+#pragma once
 
 #include <dbus/dbus.h>
 
@@ -21,5 +20,3 @@ public:
 };
 
 } /* namespace ODBus */
-
-#endif

src/lib/dbus/Message.hxx

@@ -2,8 +2,7 @@
 // Copyright CM4all GmbH
 // author: Max Kellermann <mk@cm4all.com>
 
-#ifndef ODBUS_MESSAGE_HXX
-#define ODBUS_MESSAGE_HXX
+#pragma once
 
 #include <dbus/dbus.h>
 
@@ -123,5 +122,3 @@ public:
 };
 
 } /* namespace ODBus */
-
-#endif

src/lib/dbus/PendingCall.hxx

@@ -2,8 +2,7 @@
 // Copyright CM4all GmbH
 // author: Max Kellermann <mk@cm4all.com>
 
-#ifndef ODBUS_PENDING_CALL_HXX
-#define ODBUS_PENDING_CALL_HXX
+#pragma once
 
 #include <dbus/dbus.h>
 
@@ -76,5 +75,3 @@ public:
 };
 
 } /* namespace ODBus */
-
-#endif

src/lib/dbus/ScopeMatch.hxx

@@ -2,8 +2,7 @@
 // Copyright CM4all GmbH
 // author: Max Kellermann <mk@cm4all.com>
 
-#ifndef ODBUS_SCOPE_MATCH_HXX
-#define ODBUS_SCOPE_MATCH_HXX
+#pragma once
 
 #include <dbus/dbus.h>
 
@@ -29,5 +28,3 @@ public:
 };
 
 } /* namespace ODBus */
-
-#endif

src/lib/dbus/Types.hxx

@@ -2,8 +2,7 @@
 // Copyright CM4all GmbH
 // author: Max Kellermann <mk@cm4all.com>
 
-#ifndef ODBUS_TYPES_HXX
-#define ODBUS_TYPES_HXX
+#pragma once
 
 #include "util/TemplateString.hxx"
 
@@ -89,5 +88,3 @@ struct StructTypeTraits {
 };
 
 } /* namespace ODBus */
-
-#endif