39 строки
667 B
C++
39 строки
667 B
C++
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#pragma once
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#include <better/better.h>
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#if defined(BETTER_USE_FOLLY_CONTAINERS) || __cplusplus < 202000L
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#include <folly/Optional.h>
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#else
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#include <optional>
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#endif
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namespace facebook {
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namespace better {
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#if defined(BETTER_USE_FOLLY_CONTAINERS) || __cplusplus < 202000L
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template <typename Value>
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using optional = folly::Optional<Value>;
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#else
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template <typename Value>
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using optional = std::optional<Value>;
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#endif
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} // namespace better
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} // namespace facebook
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