std::optional<T>::~optional
~optional(); |
(since C++17) (until C++20) |
|
constexpr ~optional(); |
(since C++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 C++ standards.
| DR | Applied to | Behavior as published | Correct behavior |
|---|---|---|---|
| P2231R1 | C++20 | the destructor was not constexpr while non-trivial destructors can be constexpr in C++20 | made constexpr |
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