Copyright (C) Codeplay Software Limited. All Rights Reserved.

For licensing information, see the applicable license agreement under which
this project was delivered.

The optional and expected implementations contain files derived from
https://github.com/TartanLlama/optional and
https://github.com/TartanLlama/expected held under the Creative Commons CC0 1.0
Universal license (see optional.LICENSE.txt and expected.LICENSE.txt).