1 files changed, 40 insertions, 0 deletions
diff --git a/src/safe/mutableref.h b/src/safe/mutableref.h
new file mode 100644
index 0000000..fb65825
--- /dev/null
+++ b/src/safe/mutableref.h
@@ -0,0 +1,40 @@
+/**
+ * @file mutableref.h
+ * @author L.-C. C.
+ * @brief
+ * @version 0.1
+ * @date 2020-01-03
+ *
+ * @copyright Copyright (c) 2020
+ *
+ */
+
+#pragma once
+
+#include <utility>
+
+namespace safe
+{
+	namespace impl
+	{
+		/**
+		 * @brief A helper class that defines a member variable of type
+		 * Type. The variable is defined "mutable Type" if Type is not a
+		 * reference, the variable is "Type&" if Type is a reference.
+		 *
+		 * @tparam Type The type of the variable to define.
+		 */
+		template<typename Type>
+		struct MutableIfNotReference
+		{
+			/// Mutable Type object.
+			mutable Type get;
+		};
+		template<typename Type>
+		struct MutableIfNotReference<Type&>
+		{
+			/// Reference to a Type object.
+			Type& get;
+		};
+	} // namespace impl
+} // namespace safe