From 70d13963bea16049091d1786f5d99233f82d782b Mon Sep 17 00:00:00 2001
From: J Reece Wilson <me@reece.sx>
Date: Wed, 13 Apr 2022 09:50:34 +0100
Subject: [PATCH] [+] Added AuConstReference

---
 Include/auROXTL/auCopyMoveUtils.hpp | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/Include/auROXTL/auCopyMoveUtils.hpp b/Include/auROXTL/auCopyMoveUtils.hpp
index 01f4b2c..2aa5e36 100644
--- a/Include/auROXTL/auCopyMoveUtils.hpp
+++ b/Include/auROXTL/auCopyMoveUtils.hpp
@@ -9,7 +9,7 @@
 
 /**
  * @brief Upcasts R-Value upcastable @param arg.
- *        For an L-Value equivalent hint, use AuReference 
+ *        For an L-Value equivalent hint, use AuReference
  * @tparam T 
  * @param arg 
  * @return 
@@ -27,12 +27,26 @@ auline constexpr AuRemoveReference_t<T> &&AuMove(T &&arg) noexcept
  * @param arg
  * @return
 */
-template <class T>
-auline constexpr T &AuReference(T &arg) noexcept
+template <class T, AU_TEMPLATE_ENABLE_WHEN(!AuIsRValueReference_v<T> && !AuIsLValueReference_v<T>)>
+auline constexpr AuRemoveReference_t<T> &AuReference(T &arg) noexcept
 {
     return static_cast<T &>(arg);
 }
 
+/**
+ * @brief Upcasts L-Value upcastable @param arg.
+ *        For an R-Value equivalent hint, use AuMove
+ *        Recommended use case: specifying constant ref method overload over move counterpart
+ * @tparam T An expression to implicitly upcast to a constant L-value
+ * @param arg
+ * @return
+*/
+template <class T, AU_TEMPLATE_ENABLE_WHEN(!AuIsRValueReference_v<T> && !AuIsLValueReference_v<T>)>
+auline constexpr const AuRemoveReference_t<T> &AuConstReference(T &arg) noexcept
+{
+    return static_cast<const T &>(arg);
+}
+
 /**
  * @brief Preserves R or L value without reducing; implicit AuMove or AuReference
  * @tparam T An expression to implicitly upcast to an R-value