std::layout_left::mapping<Extents>::operator()

 

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std::mdspan

Member functions mdspan::mdspan mdspan::operator= Element access mdspan::operator[] Observers mdspan::rank mdspan::rank_dynamic mdspan::static_extent mdspan::extent mdspan::size mdspan::empty mdspan::stride mdspan::extents mdspan::data_handle mdspan::mapping mdspan::accessor mdspan::is_uniquemdspan::is_exhaustivemdspan::is_stridedmdspan::is_always_uniquemdspan::is_always_exhaustivemdspan::is_always_strided

Non-member functions swap(std::mdspan) Subviews submdspan (C++26) submdspan_extents (C++26) Helper types and templates extentsdextents dims (C++26) default_accessor aligned_accessor (C++26) Layout mapping policies layout_left layout_right layout_stride layout_left_padded (C++26) layout_right_padded (C++26) Subviews helpers full_extent (C++26) strided_slice (C++26) submdspan_mapping_result (C++26) Deduction guides

 

std::layout_left::mapping

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mapping::mapping

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mapping::extents

mapping::required_span_size

mapping::operator()

mapping::is_uniquemapping::is_exhaustivemapping::is_stridedmapping::is_always_uniquemapping::is_always_exhaustivemapping::is_always_strided

mapping::stride

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operator==

submdspan_mapping(std::layout_left::mapping) (C++26)

 

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() is true,
• (std::is_convertible_v<Indices, index_type> && ...) is true, and
• (std::is_nothrow_constructible_v<index_type, Indices> && ...) is true.

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.

See also

operator()	maps a multidimensional index into an offset value (public member function of std::layout_right::mapping<Extents>)
operator()	maps a multidimensional index into an offset value (public member function of std::layout_stride::mapping<Extents>)
operator[]	accesses an element at the specified multidimensional index (public member function of std::mdspan<T,Extents,LayoutPolicy,AccessorPolicy>)