[tab:optional.swap] (original) (raw)
22 General utilities library [utilities]
22.5 Optional objects [optional]
22.5.3 Class template optional [optional.optional]
22.5.3.5 Swap [optional.swap]
Table 69 — optional::swap(optional&) effects [tab:optional.swap]
| 🔗 | *this contains a value | *this does not contain a value |
|---|---|---|
| 🔗rhs contains a value | calls swap(*(*this), *rhs) | direct-non-list-initializes the contained value of *thiswith std::move(*rhs), followed by rhs.val->T::~T(); postcondition is that *this contains a value and rhs does not contain a value |
| 🔗rhs does not contain a value | direct-non-list-initializes the contained value of rhswith std::move(*(*this)), followed by val->T::~T(); postcondition is that *this does not contain a value and rhs contains a value | no effect |