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Merge pull request #9193 from Gymnasiast/optional-header

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Add `optional` header
This commit is contained in:
Aaron van Geffen
2019-05-03 10:45:50 +02:00
committed by GitHub
parent ddcebc9b4c 63a38412aa
commit 0da35a599d
1 changed files with 29 additions and 0 deletions
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29
src/openrct2/core/Optional.hpp Normal file
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/*****************************************************************************
* Copyright (c) 2014-2019 OpenRCT2 developers
*
* For a complete list of all authors, please refer to contributors.md
* Interested in contributing? Visit https://github.com/OpenRCT2/OpenRCT2
*
* OpenRCT2 is licensed under the GNU General Public License version 3.
*****************************************************************************/
#pragma once
#ifdef __has_include
# if __has_include(<optional>)
# include <optional>
# elif __has_include(<experimental/optional>)
# include <experimental/optional>
# else
# error Missing <optional>
# endif
#else
# error __has_include is not defined
#endif
// `optional` and friends will be available in NS `::opt`
#if __has_include(<optional>)
namespace opt = std;
#elif __has_include(<experimental/optional>)
namespace opt = std::experimental;
#endif