From ff2f13c99f24de35d9452e372825b056748d9ca8 Mon Sep 17 00:00:00 2001
From: Gary Talent <gary@drinkingtea.net>
Date: Sat, 3 Jul 2021 18:30:15 -0500
Subject: [PATCH] [ox/std] Add defer

---
 deps/ox/src/ox/std/CMakeLists.txt |  1 +
 deps/ox/src/ox/std/defer.hpp      | 37 +++++++++++++++++++++++++++++++
 deps/ox/src/ox/std/std.hpp        |  1 +
 3 files changed, 39 insertions(+)
 create mode 100644 deps/ox/src/ox/std/defer.hpp

diff --git a/deps/ox/src/ox/std/CMakeLists.txt b/deps/ox/src/ox/std/CMakeLists.txt
index f6acb3836..aca844e43 100644
--- a/deps/ox/src/ox/std/CMakeLists.txt
+++ b/deps/ox/src/ox/std/CMakeLists.txt
@@ -23,6 +23,7 @@ add_library(
 		buffer.cpp
 		buildinfo.cpp
 		byteswap.cpp
+		defer.hpp
 		fmt.cpp
 		heapmgr.cpp
 		memops.cpp
diff --git a/deps/ox/src/ox/std/defer.hpp b/deps/ox/src/ox/std/defer.hpp
new file mode 100644
index 000000000..d8ac1ce37
--- /dev/null
+++ b/deps/ox/src/ox/std/defer.hpp
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2015 - 2021 gary@drinkingtea.net
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include "error.hpp"
+
+namespace ox {
+
+template<typename T>
+class Defer {
+	private:
+		T m_deferredFunc;
+
+	public:
+		Defer(T deferredFunc) {
+			m_deferredFunc = deferredFunc;
+		}
+
+		Defer(const Defer&) = delete;
+
+		~Defer() {
+			m_deferredFunc();
+		}
+
+		Defer &operator=(const Defer&) = delete;
+
+};
+
+}
+
+#define oxDefer Defer oxConcat(oxDefer_, __LINE__) = [&]
\ No newline at end of file
diff --git a/deps/ox/src/ox/std/std.hpp b/deps/ox/src/ox/std/std.hpp
index 073fffc75..b0e800aa9 100644
--- a/deps/ox/src/ox/std/std.hpp
+++ b/deps/ox/src/ox/std/std.hpp
@@ -12,6 +12,7 @@
 #include "bit.hpp"
 #include "bstring.hpp"
 #include "byteswap.hpp"
+#include "defer.hpp"
 #include "defines.hpp"
 #include "error.hpp"
 #include "fmt.hpp"