std::layout_stride::mapping<Extents>::mapping-traits
From cppreference.com
< cpp | container | mdspan | layout stride | mapping
|
static
constexpr
bool is_unique(
)
noexcept
;
|
(1) | (since C++23) |
|
constexpr
bool is_exhaustive(
)
const
noexcept
;
|
(2) | (since C++23) |
|
static
constexpr
bool is_strided(
)
noexcept
;
|
(3) | (since C++23) |
|
static
constexpr
bool is_always_unique(
)
noexcept
;
|
(4) | (since C++23) |
|
static
constexpr
bool is_always_exhaustive(
)
noexcept
;
|
(5) | (since C++23) |
|
static
constexpr
bool is_always_strided(
)
noexcept
;
|
(6) | (since C++23) |
Every instance of every specialization of mapping is unique and strided.
The mapping is exhaustive if one of the following conditions is true:
- rank_ is 0, or
- there exists a permutation p of the integers in the range
[0,rank_)
-
- stride(p[0]) equals 1
- stride(p[i]) equals stride(p[i - 1 ] ) * extents( ).extent (p[i - 1 ] )
- for all i in
[1,rank_), where p[i] is the ith element of p
(rank_ is an exposition-only static member constant defined in std::layout_stride::mapping
See LayoutMapping
Parameters
(none)
Return value
1,3-4,6) true
2) true if the mapping is exhaustive (see above)
5) false
Example
| This section is incomplete Reason: no example |
See also
| This section is incomplete |