[ox/fs] Add new Directory type

deps/ox/src/ox/std/std.hpp

@@ -15,6 +15,7 @@
 #include "memops.hpp"
 #include "new.hpp"
 #include "random.hpp"
+#include "stddef.hpp"
 #include "strops.hpp"
 #include "string.hpp"
 #include "types.hpp"

deps/ox/src/ox/std/stddef.hpp

@@ -0,0 +1,13 @@
+/*
+ * Copyright 2015 - 2018 gtalent2@gmail.com
+ *
+ * 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
+
+#if !defined(offsetof)
+#define offsetof(type, member) __builtin_offsetof(type, member)
+#endif

deps/ox/src/ox/std/types.hpp

@@ -66,11 +66,15 @@ struct ValErr {
 		this->error = error;
 	}
 
+	inline constexpr operator const T&() const {
+		return value;
+	}
+
 	inline constexpr operator T&() {
 		return value;
 	}
 
-	inline constexpr bool ok() {
+	inline constexpr bool ok() const {
 		return error == 0;
 	}