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deduction guides for std::mdspan

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C++
Containers library
std::mdspan
定义于头文件 <mdspan>
template < class CArray >

requires ( std:: is_array_v < CArray > && std:: rank_v < CArray > == 1 )
mdspan ( CArray & )
- > mdspan < std:: remove_all_extents_t < CArray > ,

std:: extents < std:: size_t , std:: extent_v < CArray, 0 >>> ;
(1) (C++23 起)
template < class Pointer >

requires ( std:: is_pointer_v < std:: remove_reference_t < Pointer >> )
mdspan ( Pointer && )
- > mdspan < std:: remove_pointer_t < std:: remove_reference_t < Pointer >> ,

std:: extents < size_t >> ;
(2) (C++23 起)
template < class ElementType, class ... Integrals >

requires ( ( std:: is_convertible_v < Integrals, std:: size_t > && ... ) &&
sizeof... ( Integrals ) > 0 )
explicit mdspan ( ElementType * , Integrals... )

- > mdspan < ElementType, std:: dextents < std:: size_t , sizeof... ( Integrals ) >> ;
(3) (C++23 起)
template < class ElementType, class OtherIndexType, std:: size_t N >

mdspan ( ElementType * , std:: span < OtherIndexType, N > )

- > mdspan < ElementType, std:: dextents < std:: size_t , N >> ;
(4) (C++23 起)
template < class ElementType, class OtherIndexType, std:: size_t N >

mdspan ( ElementType * , const std:: array < OtherIndexType, N > & )

- > mdspan < ElementType, std:: dextents < std:: size_t , N >> ;
(5) (C++23 起)
template < class ElementType, class IndexType, std:: size_t ... ExtentsPack >

mdspan ( ElementType * , const std:: extents < IndexType, ExtentsPack... > & )

- > mdspan < ElementType, std:: extents < IndexType, ExtentsPack... >> ;
(6) (C++23 起)
template < class ElementType, class MappingType >

mdspan ( ElementType * , const MappingType & )
- > mdspan < ElementType, typename MappingType :: extents_type ,

typename MappingType :: layout_type > ;
(7) (C++23 起)
template < class MappingType, class AccessorType >

mdspan ( const typename AccessorType :: data_handle_type & , const MappingType & ,
const AccessorType & )
- > mdspan < typename AccessorType :: element_type ,
typename MappingType :: extents_type ,

typename MappingType :: layout_type , AccessorType > ;
(8) (C++23 起)
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示例

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原因：缺少示例