20
General utilities library
[utilities]
20.6
Optional objects
[optional]
20.6.3
Class template
optional
[optional.optional]
20.6.3.6
Modifiers
[optional.mod]
🔗
void
reset
(
)
noexcept
;
1
#
Effects:
If
*
this
contains a value, calls
val
-
>
T
::
~
T
(
)
to destroy the contained value; otherwise no effect
.
2
#
Postconditions:
*
this
does not contain a value
.