22
General utilities library
[utilities]
22.10
Function objects
[function.objects]
22.10.17
Polymorphic function wrappers
[func.wrap]
22.10.17.3
Class template
function
[func.wrap.func]
22.10.17.3.4
Capacity
[func.wrap.func.cap]
🔗
explicit
operator
bool
(
)
const
noexcept
;
1
#
Returns
:
true
if
*
this
has a target, otherwise
false
.