Modernize: Use #pragma once in all header files

#pragma once is a widely supported compiler pragma, even though it is
not part of the C++ standard. Many of the issues keeping #pragma once
from being standardized (distributed filesystems, build farms, hard
links, etc.) do not apply to CMake - it is easy to build CMake on a
single machine. CMake also does not install any header files which can
be consumed by other projects (though cmCPluginAPI.h has been
deliberately omitted from this conversion in case anyone is still using
it.) Finally, #pragma once has been required to build CMake since at
least August 2017 (7f29bbe6 enabled server mode unconditionally, which
had been using #pragma once since September 2016 (b13d3e0d)). The fact
that we now require C++11 filters out old compilers, and it is unlikely
that there is a compiler which supports C++11 but does not support
#pragma once.

51 files changed, 51 insertions, 202 deletions

diff --git a/Source/CTest/cmCTestBZR.h b/Source/CTest/cmCTestBZR.h
index d7c6321..eb0dbbe 100644
--- a/Source/CTest/cmCTestBZR.h
+++ b/Source/CTest/cmCTestBZR.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestBZR_h
-#define cmCTestBZR_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -50,5 +49,3 @@ private:
   friend class UpdateParser;
   friend class StatusParser;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestBinPacker.h b/Source/CTest/cmCTestBinPacker.h
index ff02b85..e56a437 100644
--- a/Source/CTest/cmCTestBinPacker.h
+++ b/Source/CTest/cmCTestBinPacker.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestBinPacker_h
-#define cmCTestBinPacker_h
+#pragma once
 
 #include <cstddef>
 #include <map>
@@ -27,5 +26,3 @@ bool cmAllocateCTestResourcesRoundRobin(
 bool cmAllocateCTestResourcesBlock(
   const std::map<std::string, cmCTestResourceAllocator::Resource>& resources,
   std::vector<cmCTestBinPackerAllocation>& allocations);
-
-#endif
diff --git a/Source/CTest/cmCTestBuildAndTestHandler.h b/Source/CTest/cmCTestBuildAndTestHandler.h
index 0c8a040..b9cc35c 100644
--- a/Source/CTest/cmCTestBuildAndTestHandler.h
+++ b/Source/CTest/cmCTestBuildAndTestHandler.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestBuildAndTestHandler_h
-#define cmCTestBuildAndTestHandler_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -71,5 +70,3 @@ protected:
   bool BuildNoCMake;
   cmDuration Timeout;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestBuildCommand.h b/Source/CTest/cmCTestBuildCommand.h
index 0f82817..00dbcc4 100644
--- a/Source/CTest/cmCTestBuildCommand.h
+++ b/Source/CTest/cmCTestBuildCommand.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestBuildCommand_h
-#define cmCTestBuildCommand_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -62,5 +61,3 @@ protected:
   std::string Flags;
   std::string ProjectName;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestBuildHandler.h b/Source/CTest/cmCTestBuildHandler.h
index a5193f6..58e8d9c 100644
--- a/Source/CTest/cmCTestBuildHandler.h
+++ b/Source/CTest/cmCTestBuildHandler.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestBuildHandler_h
-#define cmCTestBuildHandler_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -156,5 +155,3 @@ private:
   friend class LaunchHelper;
   class FragmentCompare;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestCVS.h b/Source/CTest/cmCTestCVS.h
index 7d33d8f..d20239b 100644
--- a/Source/CTest/cmCTestCVS.h
+++ b/Source/CTest/cmCTestCVS.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestCVS_h
-#define cmCTestCVS_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -51,5 +50,3 @@ private:
   friend class LogParser;
   friend class UpdateParser;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestCommand.h b/Source/CTest/cmCTestCommand.h
index 8efb419..007378d 100644
--- a/Source/CTest/cmCTestCommand.h
+++ b/Source/CTest/cmCTestCommand.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestCommand_h
-#define cmCTestCommand_h
+#pragma once
 
 #include "cmCommand.h"
 
@@ -27,5 +26,3 @@ public:
   cmCTest* CTest;
   cmCTestScriptHandler* CTestScriptHandler;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestConfigureCommand.h b/Source/CTest/cmCTestConfigureCommand.h
index 3f5944a..f338637 100644
--- a/Source/CTest/cmCTestConfigureCommand.h
+++ b/Source/CTest/cmCTestConfigureCommand.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestConfigureCommand_h
-#define cmCTestConfigureCommand_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -45,5 +44,3 @@ protected:
 
   std::string Options;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestConfigureHandler.h b/Source/CTest/cmCTestConfigureHandler.h
index 01fe801..2aad98c 100644
--- a/Source/CTest/cmCTestConfigureHandler.h
+++ b/Source/CTest/cmCTestConfigureHandler.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestConfigureHandler_h
-#define cmCTestConfigureHandler_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -25,5 +24,3 @@ public:
 
   void Initialize() override;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestCoverageCommand.h b/Source/CTest/cmCTestCoverageCommand.h
index 76aaf46..9344852 100644
--- a/Source/CTest/cmCTestCoverageCommand.h
+++ b/Source/CTest/cmCTestCoverageCommand.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestCoverageCommand_h
-#define cmCTestCoverageCommand_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -48,5 +47,3 @@ protected:
   bool LabelsMentioned;
   std::vector<std::string> Labels;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestCoverageHandler.h b/Source/CTest/cmCTestCoverageHandler.h
index 991b89d..8732723 100644
--- a/Source/CTest/cmCTestCoverageHandler.h
+++ b/Source/CTest/cmCTestCoverageHandler.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestCoverageHandler_h
-#define cmCTestCoverageHandler_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -149,5 +148,3 @@ private:
   bool IntersectsFilter(LabelSet const& labels);
   bool IsFilteredOut(std::string const& source);
 };
-
-#endif
diff --git a/Source/CTest/cmCTestCurl.h b/Source/CTest/cmCTestCurl.h
index b0d7f07..d9aa916 100644
--- a/Source/CTest/cmCTestCurl.h
+++ b/Source/CTest/cmCTestCurl.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestCurl_h
-#define cmCTestCurl_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -52,5 +51,3 @@ private:
   bool Quiet;
   int TimeOutSeconds;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestEmptyBinaryDirectoryCommand.h b/Source/CTest/cmCTestEmptyBinaryDirectoryCommand.h
index ac96a4e..ba2b0eb 100644
--- a/Source/CTest/cmCTestEmptyBinaryDirectoryCommand.h
+++ b/Source/CTest/cmCTestEmptyBinaryDirectoryCommand.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestEmptyBinaryDirectoryCommand_h
-#define cmCTestEmptyBinaryDirectoryCommand_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -45,5 +44,3 @@ public:
   bool InitialPass(std::vector<std::string> const& args,
                    cmExecutionStatus& status) override;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestGIT.h b/Source/CTest/cmCTestGIT.h
index 3103d84..a15aef5 100644
--- a/Source/CTest/cmCTestGIT.h
+++ b/Source/CTest/cmCTestGIT.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestGIT_h
-#define cmCTestGIT_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -53,5 +52,3 @@ public:
   friend class DiffParser;
   friend class OneLineParser;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestGenericHandler.h b/Source/CTest/cmCTestGenericHandler.h
index 94e5418..591d9cd 100644
--- a/Source/CTest/cmCTestGenericHandler.h
+++ b/Source/CTest/cmCTestGenericHandler.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestGenericHandler_h
-#define cmCTestGenericHandler_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -105,5 +104,3 @@ protected:
   cmCTestCommand* Command;
   int SubmitIndex;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestGlobalVC.h b/Source/CTest/cmCTestGlobalVC.h
index ff86591..679b0e1 100644
--- a/Source/CTest/cmCTestGlobalVC.h
+++ b/Source/CTest/cmCTestGlobalVC.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestGlobalVC_h
-#define cmCTestGlobalVC_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -73,5 +72,3 @@ protected:
   void WriteXMLDirectory(cmXMLWriter& xml, std::string const& path,
                          Directory const& dir);
 };
-
-#endif
diff --git a/Source/CTest/cmCTestHG.h b/Source/CTest/cmCTestHG.h
index 2900139..b81f042 100644
--- a/Source/CTest/cmCTestHG.h
+++ b/Source/CTest/cmCTestHG.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestHG_h
-#define cmCTestHG_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -42,5 +41,3 @@ private:
   friend class LogParser;
   friend class StatusParser;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestHandlerCommand.h b/Source/CTest/cmCTestHandlerCommand.h
index a20d607..756952d 100644
--- a/Source/CTest/cmCTestHandlerCommand.h
+++ b/Source/CTest/cmCTestHandlerCommand.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestHandlerCommand_h
-#define cmCTestHandlerCommand_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -58,5 +57,3 @@ protected:
   "The APPEND option marks results for append to those previously "           \
   "submitted to a dashboard server since the last ctest_start.  "             \
   "Append semantics are defined by the dashboard server in use."
-
-#endif
diff --git a/Source/CTest/cmCTestLaunch.h b/Source/CTest/cmCTestLaunch.h
index 79a7712..33ff82c 100644
--- a/Source/CTest/cmCTestLaunch.h
+++ b/Source/CTest/cmCTestLaunch.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestLaunch_h
-#define cmCTestLaunch_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -103,5 +102,3 @@ private:
   void LoadConfig();
   std::string SourceDir;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestMemCheckCommand.h b/Source/CTest/cmCTestMemCheckCommand.h
index 8f4ffb8..6544f16 100644
--- a/Source/CTest/cmCTestMemCheckCommand.h
+++ b/Source/CTest/cmCTestMemCheckCommand.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestMemCheckCommand_h
-#define cmCTestMemCheckCommand_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -43,5 +42,3 @@ protected:
 
   std::string DefectCount;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestMemCheckHandler.h b/Source/CTest/cmCTestMemCheckHandler.h
index 63ab573..6ef5d20 100644
--- a/Source/CTest/cmCTestMemCheckHandler.h
+++ b/Source/CTest/cmCTestMemCheckHandler.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestMemCheckHandler_h
-#define cmCTestMemCheckHandler_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -157,5 +156,3 @@ private:
   //! generate the output filename for the given test index
   void TestOutputFileNames(int test, std::vector<std::string>& files);
 };
-
-#endif
diff --git a/Source/CTest/cmCTestMultiProcessHandler.h b/Source/CTest/cmCTestMultiProcessHandler.h
index e21b912..5de42f9 100644
--- a/Source/CTest/cmCTestMultiProcessHandler.h
+++ b/Source/CTest/cmCTestMultiProcessHandler.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestMultiProcessHandler_h
-#define cmCTestMultiProcessHandler_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -200,5 +199,3 @@ protected:
   bool Quiet;
   bool SerialTestRunning;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestP4.h b/Source/CTest/cmCTestP4.h
index e19472e..d03f9cb 100644
--- a/Source/CTest/cmCTestP4.h
+++ b/Source/CTest/cmCTestP4.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestP4_h
-#define cmCTestP4_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -72,5 +71,3 @@ private:
   friend class DescribeParser;
   friend class DiffParser;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestReadCustomFilesCommand.h b/Source/CTest/cmCTestReadCustomFilesCommand.h
index cbb9390..03714f6 100644
--- a/Source/CTest/cmCTestReadCustomFilesCommand.h
+++ b/Source/CTest/cmCTestReadCustomFilesCommand.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestReadCustomFilesCommand_h
-#define cmCTestReadCustomFilesCommand_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -44,5 +43,3 @@ public:
   bool InitialPass(std::vector<std::string> const& args,
                    cmExecutionStatus& status) override;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestResourceAllocator.h b/Source/CTest/cmCTestResourceAllocator.h
index 9f0b9c9..129e64e 100644
--- a/Source/CTest/cmCTestResourceAllocator.h
+++ b/Source/CTest/cmCTestResourceAllocator.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestResourceAllocator_h
-#define cmCTestResourceAllocator_h
+#pragma once
 
 #include <map>
 #include <string>
@@ -35,5 +34,3 @@ public:
 private:
   std::map<std::string, std::map<std::string, Resource>> Resources;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestResourceGroupsLexerHelper.h b/Source/CTest/cmCTestResourceGroupsLexerHelper.h
index 2cb6cb1..ae4fa99 100644
--- a/Source/CTest/cmCTestResourceGroupsLexerHelper.h
+++ b/Source/CTest/cmCTestResourceGroupsLexerHelper.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestResourceGroupsLexerHelper_h
-#define cmCTestResourceGroupsLexerHelper_h
+#pragma once
 
 #include <string>
 #include <vector>
@@ -40,5 +39,3 @@ private:
 };
 
 #define YY_EXTRA_TYPE cmCTestResourceGroupsLexerHelper*
-
-#endif
diff --git a/Source/CTest/cmCTestResourceSpec.h b/Source/CTest/cmCTestResourceSpec.h
index cb242c0..1aa279b 100644
--- a/Source/CTest/cmCTestResourceSpec.h
+++ b/Source/CTest/cmCTestResourceSpec.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestResourceSpec_h
-#define cmCTestResourceSpec_h
+#pragma once
 
 #include <map>
 #include <string>
@@ -51,5 +50,3 @@ public:
   bool operator==(const cmCTestResourceSpec& other) const;
   bool operator!=(const cmCTestResourceSpec& other) const;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestRunScriptCommand.h b/Source/CTest/cmCTestRunScriptCommand.h
index 2d8bde1..510b748 100644
--- a/Source/CTest/cmCTestRunScriptCommand.h
+++ b/Source/CTest/cmCTestRunScriptCommand.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestRunScriptCommand_h
-#define cmCTestRunScriptCommand_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -45,5 +44,3 @@ public:
   bool InitialPass(std::vector<std::string> const& args,
                    cmExecutionStatus& status) override;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestRunTest.h b/Source/CTest/cmCTestRunTest.h
index d831247..863ac1b 100644
--- a/Source/CTest/cmCTestRunTest.h
+++ b/Source/CTest/cmCTestRunTest.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestRunTest_h
-#define cmCTestRunTest_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -159,5 +158,3 @@ inline int getNumWidth(size_t n)
   }
   return w;
 }
-
-#endif
diff --git a/Source/CTest/cmCTestSVN.h b/Source/CTest/cmCTestSVN.h
index b74dc12..370d176 100644
--- a/Source/CTest/cmCTestSVN.h
+++ b/Source/CTest/cmCTestSVN.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestSVN_h
-#define cmCTestSVN_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -103,5 +102,3 @@ private:
   friend class UpdateParser;
   friend class ExternalParser;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestScriptHandler.h b/Source/CTest/cmCTestScriptHandler.h
index ebb7905..8eb9658 100644
--- a/Source/CTest/cmCTestScriptHandler.h
+++ b/Source/CTest/cmCTestScriptHandler.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestScriptHandler_h
-#define cmCTestScriptHandler_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -176,5 +175,3 @@ private:
   std::unique_ptr<cmGlobalGenerator> GlobalGenerator;
   std::unique_ptr<cmake> CMake;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestSleepCommand.h b/Source/CTest/cmCTestSleepCommand.h
index 1c3b8a1..9425576 100644
--- a/Source/CTest/cmCTestSleepCommand.h
+++ b/Source/CTest/cmCTestSleepCommand.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestSleepCommand_h
-#define cmCTestSleepCommand_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -45,5 +44,3 @@ public:
   bool InitialPass(std::vector<std::string> const& args,
                    cmExecutionStatus& status) override;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestStartCommand.h b/Source/CTest/cmCTestStartCommand.h
index b30b1bb..b3d06a7 100644
--- a/Source/CTest/cmCTestStartCommand.h
+++ b/Source/CTest/cmCTestStartCommand.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestStartCommand_h
-#define cmCTestStartCommand_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -62,5 +61,3 @@ private:
   bool CreateNewTag;
   bool Quiet;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestSubmitCommand.h b/Source/CTest/cmCTestSubmitCommand.h
index 9060771..c5d11df 100644
--- a/Source/CTest/cmCTestSubmitCommand.h
+++ b/Source/CTest/cmCTestSubmitCommand.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestSubmitCommand_h
-#define cmCTestSubmitCommand_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -55,5 +54,3 @@ protected:
   std::vector<std::string> HttpHeaders;
   std::vector<std::string> Parts;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestSubmitHandler.h b/Source/CTest/cmCTestSubmitHandler.h
index 304daaa..809c615 100644
--- a/Source/CTest/cmCTestSubmitHandler.h
+++ b/Source/CTest/cmCTestSubmitHandler.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestSubmitHandler_h
-#define cmCTestSubmitHandler_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -77,5 +76,3 @@ private:
   std::set<std::string> Files;
   std::vector<std::string> HttpHeaders;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestTestCommand.h b/Source/CTest/cmCTestTestCommand.h
index 7925586..624cd91 100644
--- a/Source/CTest/cmCTestTestCommand.h
+++ b/Source/CTest/cmCTestTestCommand.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestTestCommand_h
-#define cmCTestTestCommand_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -62,5 +61,3 @@ protected:
   std::string ResourceSpecFile;
   bool StopOnFailure = false;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestTestHandler.h b/Source/CTest/cmCTestTestHandler.h
index f9e9391..aa29eeb 100644
--- a/Source/CTest/cmCTestTestHandler.h
+++ b/Source/CTest/cmCTestTestHandler.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestTestHandler_h
-#define cmCTestTestHandler_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -360,5 +359,3 @@ private:
   int RepeatCount = 1;
   bool RerunFailed;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestUpdateCommand.h b/Source/CTest/cmCTestUpdateCommand.h
index 5555c16..e4c3453 100644
--- a/Source/CTest/cmCTestUpdateCommand.h
+++ b/Source/CTest/cmCTestUpdateCommand.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestUpdateCommand_h
-#define cmCTestUpdateCommand_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -42,5 +41,3 @@ public:
 protected:
   cmCTestGenericHandler* InitializeHandler() override;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestUpdateHandler.h b/Source/CTest/cmCTestUpdateHandler.h
index afc0e3d..25bbb2f 100644
--- a/Source/CTest/cmCTestUpdateHandler.h
+++ b/Source/CTest/cmCTestUpdateHandler.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestUpdateHandler_h
-#define cmCTestUpdateHandler_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -63,5 +62,3 @@ private:
   int DetectVCS(const char* dir);
   bool SelectVCS();
 };
-
-#endif
diff --git a/Source/CTest/cmCTestUploadCommand.h b/Source/CTest/cmCTestUploadCommand.h
index 8334a9e..fe155f6 100644
--- a/Source/CTest/cmCTestUploadCommand.h
+++ b/Source/CTest/cmCTestUploadCommand.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestUploadCommand_h
-#define cmCTestUploadCommand_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -48,5 +47,3 @@ protected:
 
   std::vector<std::string> Files;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestUploadHandler.h b/Source/CTest/cmCTestUploadHandler.h
index dde14df..55d21c1 100644
--- a/Source/CTest/cmCTestUploadHandler.h
+++ b/Source/CTest/cmCTestUploadHandler.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestUploadHandler_h
-#define cmCTestUploadHandler_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -36,5 +35,3 @@ public:
 private:
   std::set<std::string> Files;
 };
-
-#endif
diff --git a/Source/CTest/cmCTestVC.h b/Source/CTest/cmCTestVC.h
index 3037e01..9bd7229 100644
--- a/Source/CTest/cmCTestVC.h
+++ b/Source/CTest/cmCTestVC.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmCTestVC_h
-#define cmCTestVC_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -150,5 +149,3 @@ protected:
   // Count paths reported with each PathStatus value.
   int PathCount[3];
 };
-
-#endif
diff --git a/Source/CTest/cmParseBlanketJSCoverage.h b/Source/CTest/cmParseBlanketJSCoverage.h
index cd1b225..e107454 100644
--- a/Source/CTest/cmParseBlanketJSCoverage.h
+++ b/Source/CTest/cmParseBlanketJSCoverage.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmParseBlanketJSCoverage_h
-#define cmParseBlanketJSCoverage_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -39,4 +38,3 @@ protected:
   cmCTestCoverageHandlerContainer& Coverage;
   cmCTest* CTest;
 };
-#endif
diff --git a/Source/CTest/cmParseCacheCoverage.h b/Source/CTest/cmParseCacheCoverage.h
index a8200b7..523f83b 100644
--- a/Source/CTest/cmParseCacheCoverage.h
+++ b/Source/CTest/cmParseCacheCoverage.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmParseCacheCoverage_h
-#define cmParseCacheCoverage_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -31,5 +30,3 @@ protected:
   // Read a single mcov file
   bool ReadCMCovFile(const char* f);
 };
-
-#endif
diff --git a/Source/CTest/cmParseCoberturaCoverage.h b/Source/CTest/cmParseCoberturaCoverage.h
index cb6d097..0340433 100644
--- a/Source/CTest/cmParseCoberturaCoverage.h
+++ b/Source/CTest/cmParseCoberturaCoverage.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmParseCoberturaCoverage_h
-#define cmParseCoberturaCoverage_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -41,5 +40,3 @@ private:
   cmCTest* CTest;
   std::string CurFileName;
 };
-
-#endif
diff --git a/Source/CTest/cmParseDelphiCoverage.h b/Source/CTest/cmParseDelphiCoverage.h
index 1b37405..2a014a1 100644
--- a/Source/CTest/cmParseDelphiCoverage.h
+++ b/Source/CTest/cmParseDelphiCoverage.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmParseDelphiCoverage_h
-#define cmParseDelphiCoverage_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -35,4 +34,3 @@ protected:
   cmCTestCoverageHandlerContainer& Coverage;
   cmCTest* CTest;
 };
-#endif
diff --git a/Source/CTest/cmParseGTMCoverage.h b/Source/CTest/cmParseGTMCoverage.h
index 41cc7f5..c35bf6e 100644
--- a/Source/CTest/cmParseGTMCoverage.h
+++ b/Source/CTest/cmParseGTMCoverage.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmParseGTMCoverage_h
-#define cmParseGTMCoverage_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -37,5 +36,3 @@ protected:
   bool ParseMCOVLine(std::string const& line, std::string& routine,
                      std::string& function, int& linenumber, int& count);
 };
-
-#endif
diff --git a/Source/CTest/cmParseJacocoCoverage.h b/Source/CTest/cmParseJacocoCoverage.h
index f2aec6d..3442dd0 100644
--- a/Source/CTest/cmParseJacocoCoverage.h
+++ b/Source/CTest/cmParseJacocoCoverage.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmParseJacocoCoverage_h
-#define cmParseJacocoCoverage_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -49,5 +48,3 @@ private:
   cmCTestCoverageHandlerContainer& Coverage;
   cmCTest* CTest;
 };
-
-#endif
diff --git a/Source/CTest/cmParseMumpsCoverage.h b/Source/CTest/cmParseMumpsCoverage.h
index 8c08702..00a8431 100644
--- a/Source/CTest/cmParseMumpsCoverage.h
+++ b/Source/CTest/cmParseMumpsCoverage.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmParseMumpsCoverage_h
-#define cmParseMumpsCoverage_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -43,5 +42,3 @@ protected:
   cmCTestCoverageHandlerContainer& Coverage;
   cmCTest* CTest;
 };
-
-#endif
diff --git a/Source/CTest/cmParsePHPCoverage.h b/Source/CTest/cmParsePHPCoverage.h
index ff0e636..763a6bb 100644
--- a/Source/CTest/cmParsePHPCoverage.h
+++ b/Source/CTest/cmParsePHPCoverage.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmParsePHPCoverage_h
-#define cmParsePHPCoverage_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -35,5 +34,3 @@ private:
   cmCTestCoverageHandlerContainer& Coverage;
   cmCTest* CTest;
 };
-
-#endif
diff --git a/Source/CTest/cmProcess.h b/Source/CTest/cmProcess.h
index 1e6578c..9eec952 100644
--- a/Source/CTest/cmProcess.h
+++ b/Source/CTest/cmProcess.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmProcess_h
-#define cmProcess_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -132,5 +131,3 @@ private:
   int Id;
   int64_t ExitValue;
 };
-
-#endif