24
Containers library
[containers]
24.7
Views
[views]
24.7.2
Contiguous access
[views.contiguous]
24.7.2.1
Header
<span>
synopsis
[span.syn]
🔗
#include
<
initializer_list
>
// see
[initializer.
list.
syn]
// mostly freestanding
namespace
std
{
// constants
inline
constexpr
size_t
dynamic_extent
=
numeric_limits
<
size_t
>
::
max
(
)
;
template
<
class
T
>
concept
integral-constant-like
=
//
exposition only
is_integral_v
<
decltype
(
T
::
value
)
>
&
&
!
is_same_v
<
bool
, remove_const_t
<
decltype
(
T
::
value
)
>
>
&
&
convertible_
to
<
T,
decltype
(
T
::
value
)
>
&
&
equality_
comparable_
with
<
T,
decltype
(
T
::
value
)
>
&
&
bool_constant
<
T
(
)
=
=
T
::
value
>
::
value
&
&
bool_constant
<
static_cast
<
decltype
(
T
::
value
)
>
(
T
(
)
)
=
=
T
::
value
>
::
value;
template
<
class
T
>
constexpr
size_t
maybe-static-ext
=
dynamic_extent;
//
exposition only
template
<
integral-constant-like
T
>
constexpr
size_t
maybe-static-ext
<
T
>
=
{
T
::
value
}
;
//
[views.
span]
, class template
span
template
<
class
ElementType, size_t Extent
=
dynamic_extent
>
class
span;
// partially freestanding
template
<
class
ElementType, size_t Extent
>
constexpr
bool
ranges
::
enable_view
<
span
<
ElementType, Extent
>
>
=
true
;
template
<
class
ElementType, size_t Extent
>
constexpr
bool
ranges
::
enable_borrowed_range
<
span
<
ElementType, Extent
>
>
=
true
;
//
[span.
objectrep]
, views of object representation
template
<
class
ElementType, size_t Extent
>
span
<
const
byte, Extent
=
=
dynamic_extent
?
dynamic_extent
:
sizeof
(
ElementType
)
*
Extent
>
as_bytes
(
span
<
ElementType, Extent
>
s
)
noexcept
;
template
<
class
ElementType, size_t Extent
>
span
<
byte, Extent
=
=
dynamic_extent
?
dynamic_extent
:
sizeof
(
ElementType
)
*
Extent
>
as_writable_bytes
(
span
<
ElementType, Extent
>
s
)
noexcept
;
}