std::layout_left::mapping<Extents>::operator()
template< class... Indices > constexpr index_type operator()( Indices... indices ) const noexcept; | (since C++23) |
Maps the multidimensional index indices into an offset value.
Equivalent to return ((static_cast<index_type>(indices) * stride(P)) + ... + 0); where P is a pack such that std::is_same_v<std::index_sequence_for<Indices...>, std::index_sequence<P...>> is true.
This overload participates in overload resolution only if :
-
sizeof...(Indices) == extents_type::rank()istrue, -
(std::is_convertible_v<Indices, index_type> && ...)istrue, and -
(std::is_nothrow_constructible_v<index_type, Indices> && ...)istrue.
If extents_type::index-cast(i) is not a multidimensional index in extents(), the behavior is undefined.
Parameters
| indices | - | the multidimensional index in the underlying extents object |
Return value
The offset value.
Example
See also
| maps a multidimensional index into an offset value (public member function of std::layout_right::mapping<Extents>) |
|
| maps a multidimensional index into an offset value (public member function of std::layout_stride::mapping<Extents>) |
|
| accesses an element at the specified multidimensional index (public member function of std::mdspan<T,Extents,LayoutPolicy,AccessorPolicy>) |
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