C++ named requirements: LayoutMappingPolicy (since C++23)
From cppreference.com
LayoutMappingPolicy is a type used to specify layout policy of std::mdspan. It provides a member alias template whose specialization is a LayoutMapping type.
Contents |
[edit] Requirements
A type MP
satisfies LayoutMappingPolicy if the type requirements shown below are valid:
[edit] Legend
Type | Definition |
MP
|
a layout mapping policy class |
M
|
a layout mapping class |
E
|
a specialization of std::extents |
[edit] Type requirements
- MP::mapping<E> is valid and denotes a type
M
that satisfies LayoutMapping. - M::layout_type is valid and denotes a type
MP
. - M::extents_type is valid and denotes a type
E
.
[edit] Standard library
The following standard library types satisfy LayoutMappingPolicy requirements:
(C++23) |
column-major multidimensional array layout mapping policy; leftmost extent has stride 1 (class) |
(C++23) |
row-major multidimensional array layout mapping policy; rightmost extent has stride 1 (class) |
(C++23) |
a layout mapping policy with user-defined strides (class) |
(C++26) |
column-major layout mapping policy with padding stride that can be greater than or equal to the leftmost extent (class template) |
(C++26) |
row-major layout mapping policy with padding stride that can be greater than or equal to the rightmost extent (class template) |
Defined in namespace
std::linalg | |
(C++26) |
std::mdspan layout mapping policy that swaps the rightmost two indices, extents, and strides of any unique layout mapping policy (class template) |
(C++26) |
std::mdspan layout mapping policy that represents a square matrix that stores only the entries in one triangle, in a packed contiguous format (class template) |