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std::layout_right::mapping - cppreference.com
std::layout_right::mapping
template< class Extents >
class layout_right::mapping;
(since C++23)
The class template layout_right::mapping controls how multidimensional indices are mapped in a row-major manner to a one-dimensional value representing the offset. The mapping has stride 1 at rightmost extent and strides increase right-to-left as the products of extents.
Every specialization of mapping is a LayoutMapping and a TriviallyCopyable type which satisfies regular.
The program is ill-formed if the size of the multidimensional index space Extents() is not representable as a value of type Extents::index_type when Extents::rank_dynamic() is â0â.
[edit] Template parameters Extents - specifies number of dimensions, their sizes, and which are known at compile time. Must be a specialization of std::extents. [edit] Member types Member name Definition extents_type Extents index_type extents_type::index_type size_type extents_type::size_type rank_type extents_type::rank_type layout_type std::layout_right [edit] Data members Member Definition extents_type extents_ (private) the extents object
(exposition-only member object*) [edit] Member functions constructs a new mapping
(public member function) [edit]
operator=
(explicitly defaulted)
assigns a mapping
(public member function) [edit] Observers obtains the extents object
(public member function) [edit] returns the required size of the mapping
(public member function) [edit] maps a multidimensional index into an offset value
(public member function) [edit] determines if this mapping is unique (every combination of indices maps to a different underlying element)
(public static member function) [edit] determines if this mapping is exhaustive (every underlying element can be accessed with some combination of indices)
(public static member function) [edit] determines if this mapping is strided (in each dimension, incrementing an index jumps over the same number of underlying elements every time)
(public static member function) [edit] determines if this layout mapping is always unique
(public static member function) [edit] determines if this layout mapping is always exhaustive
(public static member function) [edit] determines if this layout mapping is always strided
(public static member function) [edit] obtains the stride along the specified dimension
(public member function) [edit] [edit] Non-member functions [edit] Example [edit] See also a layout mapping of layout_left
(public member class template of std::layout_left)[edit] a layout mapping of layout_stride
(public member class template of std::layout_stride)[edit]
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