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std::experimental::optional::~optional

From cppreference.com
~optional();
(library fundamentals TS)

If the object contains a value and the type T is not trivially destructible (see std::is_trivially_destructible), destroys the contained value by calling its destructor, as if by val->T::~T().

Otherwise, does nothing.

[edit] Notes

If T is trivially-destructible, then this destructor is also trivial, so optional<T> is also trivially-destructible.