Wraps any type in a struct that also contains boolean field indicating if value is in defined state.
If T is a value type, Optional!(T) is value type too.
Shortcut on top of Optional to created defined value, uses IFTI to reduce the noise
ditto
See Source File
Boost Software License Version 1.0. See LICENSE_BOOST.txt for details. Alternatively, this file may be distributed under the terms of the Tango 3-Clause BSD License (see LICENSE_BSD.txt for details).
Copyright (c) 2009-2017 dunnhumby Germany GmbH. All rights reserved.
Wraps any type in a struct that also contains boolean field indicating if value is in defined state.
If T is a value type, Optional!(T) is value type too.