22 General utilities library [utilities]

22.5 Optional objects [optional]

22.5.3 Class template optional [optional.optional]

22.5.3.4 Assignment [optional.assign]

Table 67 — optional​::​operator=(const optional&) effects [tab:optional.assign.copy]
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*this contains a value
*this does not contain a value
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rhs contains a value
assigns rhs.val to val
direct-non-list-initializes val with rhs.val
🔗
rhs does not contain a value
destroys the contained value by calling val.T​::​~T()
no effect