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22 General utilities library [utilities]

22.5 Optional objects [optional]

22.5.3 Class template optional [optional.optional]

22.5.3.3 Destructor [optional.dtor]

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constexpr ~optional();
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Effects: If is_trivially_destructible_v<T> is false and *this contains a value, calls val.T​::​~T().
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Remarks: If is_trivially_destructible_v<T> is true, then this destructor is trivial.