Add helper to modify a flag enum

CMakeLists.txt

@@ -113,7 +113,7 @@ set(META_APP_URL "https://github.com/${META_APP_AUTHOR}/${META_PROJECT_NAME}")
 set(META_APP_DESCRIPTION "Useful C++ classes and routines such as argument parser, IO and conversion utilities")
 set(META_FEATURES_FOR_COMPILER_DETECTION_HEADER cxx_thread_local)
 set(META_VERSION_MAJOR 5)
-set(META_VERSION_MINOR 9)
+set(META_VERSION_MINOR 10)
 set(META_VERSION_PATCH 0)
 
 # find required 3rd party libraries

misc/flagenumclass.h

@@ -76,6 +76,15 @@ constexpr FlagEnumClass &operator-=(FlagEnumClass &lhs, FlagEnumClass rhs)
 
 } // namespace FlagEnumClassOperations
 
+/*!
+ * \brief Sets the specified \a relevantFlags in the specified \a flagVariable to the specified \a value.
+ */
+template <typename FlagEnumClass, Traits::EnableIf<IsFlagEnumClass<FlagEnumClass>> * = nullptr>
+constexpr FlagEnumClass &modFlagEnum(FlagEnumClass &flagVariable, FlagEnumClass relevantFlags, bool value)
+{
+    return value ? (flagVariable += relevantFlags) : (flagVariable -= relevantFlags);
+}
+
 } // namespace CppUtilities
 
 #endif // CPP_UTILITIES_FLAG_ENUM_CLASS_H