From 6b9a364a91517641f4745d6e4faa3f82a2b80e91 Mon Sep 17 00:00:00 2001
From: Jamie Reece Wilson <me@reece.sx>
Date: Tue, 30 Jul 2024 01:51:20 +0100
Subject: [PATCH] [+] C#-like using with RAII semantics. Use:
 AU_USING(pPointer/ref, MethodName)

---
 Include/auROXTL/AU_MACROS.hpp |  2 ++
 Include/auROXTL/AU_USING.hpp  | 39 +++++++++++++++++++++++++++++++++++
 2 files changed, 41 insertions(+)
 create mode 100644 Include/auROXTL/AU_USING.hpp

diff --git a/Include/auROXTL/AU_MACROS.hpp b/Include/auROXTL/AU_MACROS.hpp
index bc69691..2ea227e 100644
--- a/Include/auROXTL/AU_MACROS.hpp
+++ b/Include/auROXTL/AU_MACROS.hpp
@@ -289,3 +289,5 @@ struct AuStringOwnedException : AuStringException
 #define AU_EMIT_FIRST_COMMA_OTHERS(n),n
 
 #include "Objects/Objects.hpp"
+
+#include "AU_USING.hpp"
\ No newline at end of file
diff --git a/Include/auROXTL/AU_USING.hpp b/Include/auROXTL/AU_USING.hpp
new file mode 100644
index 0000000..f2cd939
--- /dev/null
+++ b/Include/auROXTL/AU_USING.hpp
@@ -0,0 +1,39 @@
+/***
+    Copyright (C) 2024 Jamie Reece Wilson (a/k/a "Reece"). All rights reserved.
+
+    File: AU_USING.hpp
+    Date: 2024-07-30
+    Author: Reece
+***/
+#pragma once
+
+namespace __audetail
+{
+    template <typename T_t>
+    struct __au_using
+    {
+        T_t *pThat;
+        using CB_t = void (T_t:: *)();
+        CB_t cb;
+
+        __au_using(T_t &that, CB_t cb) :
+            cb(cb),
+            pThat(&that)
+        { }
+
+        __au_using(T_t *that, CB_t cb) :
+            cb(cb),
+            pThat(that)
+        { }
+
+        ~__au_using()
+        {
+            ((pThat)->*(cb))();
+        }
+    };
+}
+
+#define AU_USING(pPointer, method)                                                                                             \
+    __audetail::__au_using<AuRemovePointer_t<AuRemoveReference_t<decltype(*pPointer)>>> AU_CONCAT(__stack_using, __COUNTER__)( \
+        pPointer,                                                                                                              \
+        &AuRemovePointer_t<AuRemoveReference_t<decltype(*pPointer)>>::method);
\ No newline at end of file