Replace header guards in Parallel with pragma once

This commit replaces all header guards in Parallel with #pragma once

Framework/Parallel/inc/MantidParallel/Collectives.h

@@ -4,8 +4,7 @@
 //     NScD Oak Ridge National Laboratory, European Spallation Source
 //     & Institut Laue - Langevin
 // SPDX - License - Identifier: GPL - 3.0 +
-#ifndef MANTID_PARALLEL_COLLECTIVES_H_
-#define MANTID_PARALLEL_COLLECTIVES_H_
+#pragma once
 
 #include "MantidParallel/Communicator.h"
 #include "MantidParallel/DllConfig.h"
@@ -103,5 +102,3 @@ void all_to_all(const Communicator &comm, T &&... args) {
 
 } // namespace Parallel
 } // namespace Mantid
-
-#endif /* MANTID_PARALLEL_COLLECTIVES_H_ */

Framework/Parallel/inc/MantidParallel/Communicator.h

@@ -4,8 +4,7 @@
 //     NScD Oak Ridge National Laboratory, European Spallation Source
 //     & Institut Laue - Langevin
 // SPDX - License - Identifier: GPL - 3.0 +
-#ifndef MANTID_PARALLEL_COMMUNICATOR_H_
-#define MANTID_PARALLEL_COMMUNICATOR_H_
+#pragma once
 
 #include "MantidParallel/DllConfig.h"
 #include "MantidParallel/Request.h"
@@ -107,5 +106,3 @@ template <typename... T> Request Communicator::irecv(T &&... args) const {
 
 } // namespace Parallel
 } // namespace Mantid
-
-#endif /* MANTID_PARALLEL_COMMUNICATOR_H_ */

Framework/Parallel/inc/MantidParallel/DllConfig.h

@@ -4,8 +4,7 @@
 //     NScD Oak Ridge National Laboratory, European Spallation Source
 //     & Institut Laue - Langevin
 // SPDX - License - Identifier: GPL - 3.0 +
-#ifndef MANTID_PARALLEL_DLLCONFIG_H_
-#define MANTID_PARALLEL_DLLCONFIG_H_
+#pragma once
 
 /*
   This file contains the DLLExport/DLLImport linkage configuration for the
@@ -18,5 +17,3 @@
 #else
 #define MANTID_PARALLEL_DLL DLLImport
 #endif // IN_MANTID_PARALLEL
-
-#endif // MANTID_PARALLEL_DLLCONFIG_H_

Framework/Parallel/inc/MantidParallel/ExecutionMode.h

@@ -4,8 +4,7 @@
 //     NScD Oak Ridge National Laboratory, European Spallation Source
 //     & Institut Laue - Langevin
 // SPDX - License - Identifier: GPL - 3.0 +
-#ifndef MANTID_PARALLEL_EXECUTIONMODE_H_
-#define MANTID_PARALLEL_EXECUTIONMODE_H_
+#pragma once
 
 #include "MantidParallel/DllConfig.h"
 #include "MantidParallel/StorageMode.h"
@@ -41,5 +40,3 @@ MANTID_PARALLEL_DLL std::string toString(ExecutionMode mode);
 
 } // namespace Parallel
 } // namespace Mantid
-
-#endif /* MANTID_PARALLEL_EXECUTIONMODE_H_ */

Framework/Parallel/inc/MantidParallel/IO/Chunker.h

@@ -4,8 +4,7 @@
 //     NScD Oak Ridge National Laboratory, European Spallation Source
 //     & Institut Laue - Langevin
 // SPDX - License - Identifier: GPL - 3.0 +
-#ifndef MANTID_PARALLEL_CHUNKER_H_
-#define MANTID_PARALLEL_CHUNKER_H_
+#pragma once
 
 #include <vector>
 
@@ -50,5 +49,3 @@ private:
 } // namespace IO
 } // namespace Parallel
 } // namespace Mantid
-
-#endif /* MANTID_PARALLEL_CHUNKER_H_ */

Framework/Parallel/inc/MantidParallel/IO/EventDataPartitioner.h

@@ -4,8 +4,7 @@
 //     NScD Oak Ridge National Laboratory, European Spallation Source
 //     & Institut Laue - Langevin
 // SPDX - License - Identifier: GPL - 3.0 +
-#ifndef MANTID_PARALLEL_EVENTDATAPARTITIONER_H_
-#define MANTID_PARALLEL_EVENTDATAPARTITIONER_H_
+#pragma once
 
 #include "MantidParallel/DllConfig.h"
 #include "MantidParallel/IO/Chunker.h"
@@ -107,5 +106,3 @@ void EventDataPartitioner<IndexType, TimeZeroType, TimeOffsetType>::partition(
 } // namespace IO
 } // namespace Parallel
 } // namespace Mantid
-
-#endif /* MANTID_PARALLEL_EVENTDATAPARTITIONER_H_ */

Framework/Parallel/inc/MantidParallel/IO/EventLoader.h

@@ -4,8 +4,7 @@
 //     NScD Oak Ridge National Laboratory, European Spallation Source
 //     & Institut Laue - Langevin
 // SPDX - License - Identifier: GPL - 3.0 +
-#ifndef MANTID_PARALLEL_EVENTLOADER_H_
-#define MANTID_PARALLEL_EVENTLOADER_H_
+#pragma once
 
 #include <string>
 #include <unordered_map>
@@ -52,5 +51,3 @@ load(const std::string &filename, const std::string &groupName,
 } // namespace IO
 } // namespace Parallel
 } // namespace Mantid
-
-#endif /* MANTID_PARALLEL_EVENTLOADER_H_ */

Framework/Parallel/inc/MantidParallel/IO/EventLoaderHelpers.h

@@ -4,8 +4,7 @@
 //     NScD Oak Ridge National Laboratory, European Spallation Source
 //     & Institut Laue - Langevin
 // SPDX - License - Identifier: GPL - 3.0 +
-#ifndef MANTID_PARALLEL_EVENTLOADERHELPERS_H_
-#define MANTID_PARALLEL_EVENTLOADERHELPERS_H_
+#pragma once
 
 #include "MantidParallel/Communicator.h"
 #include "MantidParallel/DllConfig.h"
@@ -119,5 +118,3 @@ template <class... T> void load(const H5::DataType &type, T &&... args) {
 } // namespace IO
 } // namespace Parallel
 } // namespace Mantid
-
-#endif /* MANTID_PARALLEL_EVENTLOADERHELPERS_H_ */

Framework/Parallel/inc/MantidParallel/IO/EventParser.h

@@ -4,8 +4,7 @@
 //     NScD Oak Ridge National Laboratory, European Spallation Source
 //     & Institut Laue - Langevin
 // SPDX - License - Identifier: GPL - 3.0 +
-#ifndef MANTID_PARALLEL_IO_EVENT_PARSER_H
-#define MANTID_PARALLEL_IO_EVENT_PARSER_H
+#pragma once
 
 #include "MantidParallel/Collectives.h"
 #include "MantidParallel/Communicator.h"
@@ -246,5 +245,4 @@ template <class TimeOffsetType> void EventParser<TimeOffsetType>::wait() {
 
 } // namespace IO
 } // namespace Parallel
-} // namespace Mantid
-#endif // MANTID_PARALLEL_IO_EVENT_PARSER_H
+} // namespace Mantid
\ No newline at end of file

Framework/Parallel/inc/MantidParallel/IO/EventsListsShmemManager.h

@@ -4,8 +4,7 @@
 //     NScD Oak Ridge National Laboratory, European Spallation Source
 //     & Institut Laue - Langevin
 // SPDX - License - Identifier: GPL - 3.0 +
-#ifndef MANTID_PARALLEL_EVENTSLISTSSHMEMMANAGER_H_
-#define MANTID_PARALLEL_EVENTSLISTSSHMEMMANAGER_H_
+#pragma once
 
 #include "boost/interprocess/containers/vector.hpp"
 #include "boost/interprocess/managed_shared_memory.hpp"
@@ -117,5 +116,3 @@ void EventsListsShmemManager::appendEvent(std::size_t chunkN, std::size_t listN,
 } // namespace IO
 } // namespace Parallel
 } // namespace Mantid
-
-#endif /* MANTID_PARALLEL_EVENTSLISTSSHMEMMANAGER_H_ */
\ No newline at end of file

Framework/Parallel/inc/MantidParallel/IO/EventsListsShmemStorage.h

@@ -4,8 +4,7 @@
 //     NScD Oak Ridge National Laboratory, European Spallation Source
 //     & Institut Laue - Langevin
 // SPDX - License - Identifier: GPL - 3.0 +
-#ifndef MANTID_PARALLEL_EVENTSLISTSSHMEMSTORAGE_H_
-#define MANTID_PARALLEL_EVENTSLISTSSHMEMSTORAGE_H_
+#pragma once
 
 #include "MantidParallel/DllConfig.h"
 #include "MantidParallel/IO/EventsListsShmemManager.h"
@@ -43,5 +42,3 @@ public:
 } // namespace IO
 } // namespace Parallel
 } // namespace Mantid
-
-#endif /* MANTID_PARALLEL_EVENTSLISTSSHMEMSTORAGE_H_ */
\ No newline at end of file

Framework/Parallel/inc/MantidParallel/IO/MultiProcessEventLoader.h

@@ -4,8 +4,7 @@
 //     NScD Oak Ridge National Laboratory, European Spallation Source
 //     & Institut Laue - Langevin
 // SPDX - License - Identifier: GPL - 3.0 +
-#ifndef MANTID_PARALLEL_MULTIPROCESSEVENTLOADER_H_
-#define MANTID_PARALLEL_MULTIPROCESSEVENTLOADER_H_
+#pragma once
 
 #include <atomic>
 #include <boost/numeric/conversion/cast.hpp>
@@ -373,5 +372,3 @@ void MultiProcessEventLoader::GroupLoader<
 } // namespace IO
 } // namespace Parallel
 } // namespace Mantid
-
-#endif /* MANTID_PARALLEL_MULTIPROCESSEVENTLOADER_H_ */
\ No newline at end of file

Framework/Parallel/inc/MantidParallel/IO/NXEventDataLoader.h

@@ -4,8 +4,7 @@
 //     NScD Oak Ridge National Laboratory, European Spallation Source
 //     & Institut Laue - Langevin
 // SPDX - License - Identifier: GPL - 3.0 +
-#ifndef MANTID_PARALLEL_IO_NXEVENTDATALOADER_H_
-#define MANTID_PARALLEL_IO_NXEVENTDATALOADER_H_
+#pragma once
 
 #include "MantidKernel/System.h"
 #include <H5Cpp.h>
@@ -213,5 +212,3 @@ std::string NXEventDataLoader<TimeOffsetType>::readEventTimeOffsetUnit() const {
 } // namespace IO
 } // namespace Parallel
 } // namespace Mantid
-
-#endif /* MANTID_PARALLEL_IO_NXEVENTDATALOADER_H_ */

Framework/Parallel/inc/MantidParallel/IO/NXEventDataSource.h

@@ -4,8 +4,7 @@
 //     NScD Oak Ridge National Laboratory, European Spallation Source
 //     & Institut Laue - Langevin
 // SPDX - License - Identifier: GPL - 3.0 +
-#ifndef MANTID_PARALLEL_NXEVENTDATASOURCE_H_
-#define MANTID_PARALLEL_NXEVENTDATASOURCE_H_
+#pragma once
 
 #include <vector>
 
@@ -40,5 +39,3 @@ public:
 } // namespace IO
 } // namespace Parallel
 } // namespace Mantid
-
-#endif /* MANTID_PARALLEL_NXEVENTDATASOURCE_H_ */

Framework/Parallel/inc/MantidParallel/IO/PulseTimeGenerator.h

@@ -4,8 +4,7 @@
 //     NScD Oak Ridge National Laboratory, European Spallation Source
 //     & Institut Laue - Langevin
 // SPDX - License - Identifier: GPL - 3.0 +
-#ifndef MANTID_PARALLEL_PULSETIMEGENERATOR_H_
-#define MANTID_PARALLEL_PULSETIMEGENERATOR_H_
+#pragma once
 
 #include "MantidParallel/DllConfig.h"
 #include "MantidTypes/Core/DateAndTime.h"
@@ -123,5 +122,3 @@ private:
 } // namespace IO
 } // namespace Parallel
 } // namespace Mantid
-
-#endif /* MANTID_PARALLEL_PULSETIMEGENERATOR_H_ */

Framework/Parallel/inc/MantidParallel/Nonblocking.h

@@ -4,8 +4,7 @@
 //     NScD Oak Ridge National Laboratory, European Spallation Source
 //     & Institut Laue - Langevin
 // SPDX - License - Identifier: GPL - 3.0 +
-#ifndef MANTID_PARALLEL_NONBLOCKING_H_
-#define MANTID_PARALLEL_NONBLOCKING_H_
+#pragma once
 
 #include "MantidParallel/DllConfig.h"
 #include "MantidParallel/Request.h"
@@ -44,5 +43,3 @@ void wait_all(ForwardIterator begin, ForwardIterator end) {
 
 } // namespace Parallel
 } // namespace Mantid
-
-#endif /* MANTID_PARALLEL_NONBLOCKING_H_ */

Framework/Parallel/inc/MantidParallel/Request.h

@@ -4,8 +4,7 @@
 //     NScD Oak Ridge National Laboratory, European Spallation Source
 //     & Institut Laue - Langevin
 // SPDX - License - Identifier: GPL - 3.0 +
-#ifndef MANTID_PARALLEL_REQUEST_H_
-#define MANTID_PARALLEL_REQUEST_H_
+#pragma once
 
 #include "MantidParallel/DllConfig.h"
 
@@ -58,5 +57,3 @@ Request::Request(Function &&f)
 
 } // namespace Parallel
 } // namespace Mantid
-
-#endif /* MANTID_PARALLEL_REQUEST_H_ */

Framework/Parallel/inc/MantidParallel/Status.h

@@ -4,8 +4,7 @@
 //     NScD Oak Ridge National Laboratory, European Spallation Source
 //     & Institut Laue - Langevin
 // SPDX - License - Identifier: GPL - 3.0 +
-#ifndef MANTID_PARALLEL_STATUS_H_
-#define MANTID_PARALLEL_STATUS_H_
+#pragma once
 
 #include "MantidParallel/DllConfig.h"
 
@@ -56,5 +55,3 @@ private:
 
 } // namespace Parallel
 } // namespace Mantid
-
-#endif /* MANTID_PARALLEL_STATUS_H_ */

Framework/Parallel/inc/MantidParallel/StorageMode.h

@@ -4,8 +4,7 @@
 //     NScD Oak Ridge National Laboratory, European Spallation Source
 //     & Institut Laue - Langevin
 // SPDX - License - Identifier: GPL - 3.0 +
-#ifndef MANTID_PARALLEL_STORAGEMODE_H_
-#define MANTID_PARALLEL_STORAGEMODE_H_
+#pragma once
 
 #include "MantidParallel/DllConfig.h"
 
@@ -34,5 +33,3 @@ MANTID_PARALLEL_DLL StorageMode fromString(const std::string &mode);
 
 } // namespace Parallel
 } // namespace Mantid
-
-#endif // MANTID_PARALLEL_STORAGEMODE_H_

Framework/Parallel/inc/MantidParallel/ThreadingBackend.h

@@ -4,8 +4,7 @@
 //     NScD Oak Ridge National Laboratory, European Spallation Source
 //     & Institut Laue - Langevin
 // SPDX - License - Identifier: GPL - 3.0 +
-#ifndef MANTID_PARALLEL_THREADINGBACKEND_H_
-#define MANTID_PARALLEL_THREADINGBACKEND_H_
+#pragma once
 
 #include "MantidParallel/DllConfig.h"
 #include "MantidParallel/Request.h"
@@ -174,5 +173,3 @@ Request ThreadingBackend::irecv(int dest, int source, int tag, T *data,
 } // namespace detail
 } // namespace Parallel
 } // namespace Mantid
-
-#endif /* MANTID_PARALLEL_THREADINGBACKEND_H_ */