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@@ -11,6 +11,9 @@
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// <http://creativecommons.org/publicdomain/zero/1.0/>.
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///
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#ifndef TL_OPTIONAL_HPP
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#define TL_OPTIONAL_HPP
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#include <exception>
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#include <functional>
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#include <new>
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@@ -1381,3 +1384,5 @@ template <class T> struct hash<tl::optional<T>> {
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}
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};
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} // namespace std
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#endif
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