20
General utilities library
[utilities]
20.5
Tuples
[tuple]
20.5.9
Tuple traits
[tuple.traits]
🔗
template
<
class
.
.
.
Types,
class
Alloc
>
struct
uses_allocator
<
tuple
<
Types
.
.
.
>
, Alloc
>
:
true_type
{
}
;
1
#
Preconditions:
Alloc
meets the
Cpp17Allocator
requirements (Table
36
)
.
2
#
[
Note
:
Specialization of this trait informs other library components that
tuple
can be constructed with an allocator, even though it does not have a nested
allocator_type
.
—
end note
]