#
An
alignof
expression yields the alignment requirement of its operand type
.
The operand shall be a
type-id
representing a complete object type, or an array thereof, or a reference to one of those types
.
2
#
The result is a prvalue of type
std
::
size_
t
.
[
Note
1
:
An
alignof
expression is an integral constant expression (
[expr.
const]
)
.
The
typedef-name
std
::
size_
t
is declared in the standard header
<cstddef>
(
[cstddef.
syn]
,
[support.
types.
layout]
)
.
—
end note
]
3
#
When
alignof
is applied to a reference type, the result is the alignment of the referenced type
.
When
alignof
is applied to an array type, the result is the alignment of the element type
.