std::mdspan<T,Extents,LayoutPolicy,AccessorPolicy>::mapping-traits - cppreference.com (original) (raw)
| constexpr bool is_unique() const; | (1) | (since C++23) |
|---|---|---|
| constexpr bool is_exhaustive() const; | (2) | (since C++23) |
| constexpr bool is_strided() const; | (3) | (since C++23) |
| static constexpr bool is_always_unique(); | (4) | (since C++23) |
| static constexpr bool is_always_exhaustive(); | (5) | (since C++23) |
| static constexpr bool is_always_strided(); | (6) | (since C++23) |
Checks if (1-3) the underlying layout mapping map_ or (4-6) its type mapping_type models the semantics of LayoutMapping's predicate mapping traits.
1-3) Let _func_ be (1) is_unique, (2) is_exhaustive, or (3) is_strided, then it's equivalent to return map_.func();.
4-6) Let _func_ be (4) is_always_unique, (5) is_always_exhaustive, or (6) is_always_strided, then it's equivalent to return mapping_type::func();.
[edit] Parameters
(none)
[edit] Return value
See above.