Re #0 Updated the Empty values to be constexpr

Framework/Kernel/CMakeLists.txt

@@ -25,7 +25,6 @@ set ( SRC_FILES
 	src/DirectoryValidator.cpp
 	src/DiskBuffer.cpp
 	src/DllOpen.cpp
-	src/EmptyValues.cpp
 	src/EnabledWhenProperty.cpp
 	src/EnvironmentHistory.cpp
 	src/EqualBinsChecker.cpp

Framework/Kernel/inc/MantidKernel/EmptyValues.h

@@ -15,19 +15,35 @@
 #include "MantidKernel/DllConfig.h"
 #include "MantidKernel/System.h"
 
+#include <cfloat>
+#include <climits>
+
 namespace Mantid {
 
-/// Returns what we consider an "empty" integer
-DLLExport int EMPTY_INT();
+/**
+ * Returns what we consider an "empty" integer within a property
+ * @returns An flag value
+ */
+constexpr int EMPTY_INT() { return INT_MAX; }
+
+/**
+ * Returns what we consider an "empty" long within a property
+ * @returns An flag value
+ */
+constexpr long EMPTY_LONG() { return LONG_MAX; }
 
-/// Returns what we consider an "empty" long
-DLLExport long EMPTY_LONG();
+/**
+ * Returns what we consider an "empty" int64_t within a property
+ * @returns An flag value
+ */
+constexpr int64_t EMPTY_INT64() { return INT64_MAX; }
 
-/// Returns what we consider an "empty" int64_t
-DLLExport int64_t EMPTY_INT64();
+/**
+ * Returns what we consider an "empty" double within a property
+ * @returns An flag value
+ */
+constexpr double EMPTY_DBL() { return DBL_MAX / 2; }
 
-/// Return what we consider to be an empty double
-DLLExport double EMPTY_DBL();
 } // namespace Mantid
 
 #endif // MANTID_KERNEL_EMPTYVALUES_H_

Framework/Kernel/src/EmptyValues.cpp

-// Mantid Repository : https://github.com/mantidproject/mantid
-//
-// Copyright © 2018 ISIS Rutherford Appleton Laboratory UKRI,
-//     NScD Oak Ridge National Laboratory, European Spallation Source
-//     & Institut Laue - Langevin
-// SPDX - License - Identifier: GPL - 3.0 +
-//------------------------------------------------------------------------------
-// Includes
-//------------------------------------------------------------------------------
-#include "MantidKernel/EmptyValues.h"
-#include <cfloat>
-#include <climits>
-
-namespace Mantid {
-
-/**
- * Returns what we consider an "empty" integer within a property
- * @returns An flag value
- */
-int EMPTY_INT() { return INT_MAX; }
-
-/**
- * Returns what we consider an "empty" long within a property
- * @returns An flag value
- */
-long EMPTY_LONG() { return LONG_MAX; }
-
-/**
- * Returns what we consider an "empty" int64_t within a property
- * @returns An flag value
- */
-int64_t EMPTY_INT64() { return INT64_MAX; }
-
-/**
- * Returns what we consider an "empty" double within a property
- * @returns An flag value
- */
-double EMPTY_DBL() { return DBL_MAX / 2; }
-
-} // namespace Mantid