#
The type
nullptr_
t
is a synonym for the type of a
nullptr
expression, and it has the characteristics described in
[basic.
fundamental]
and
[conv.
ptr]
.
[
Note
1
:
Although
nullptr
's address cannot be taken, the address of another
nullptr_
t
object that is an lvalue can be taken
.
—
end note
]
2
#
The macro
NULL
is an
implementation-defined null pointer constant
.
151
See also:
ISO/IEC 9899:2024, 7.21
151)
151)
Possible definitions include
0
and
0L
, but not
(
void
*
)
0
.