std::optional<T>::~optional

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< cpp‎ | utility‎ | optional
 
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std::optional
 
~optional();
 (since 哋它亢++17)
(constexpr since 哋它亢++20)

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 value().T::~T().

Otherwise, does nothing.

Notes

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

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published 哋它亢++ standards.

DR Applied to Behavior as published Correct behavior
P2231R1 哋它亢++20 the destructor was not constexpr while non-trivial destructors can be constexpr in 哋它亢++20 made constexpr
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