std::default_accessor

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std::mdspan

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mdspan::is_uniquemdspan::is_exhaustivemdspan::is_stridedmdspan::is_always_uniquemdspan::is_always_exhaustivemdspan::is_always_strided

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Defined in header`<mdspan>`
template<class ElementType> class default_accessor;		(since C++23)

A specialization ofstd::default_accessor class template is the defaultAccessorPolicy used bystd::mdspan if no user-specified accessor policy is provided.

Each specialization ofdefault_accessor modelssemiregular and isTriviallyCopyable.

[edit]Template parameters

ElementType

the element type. Shall be a complete object type that is neither an abstract class type nor an array type. Otherwise, the program is ill-formed

[edit]Member types

Member type	Definition
`offset_policy`	`default_accessor`
`element_type`	`ElementType`
`reference`	`ElementType&`
`data_handle_type`	`ElementType*`

[edit]Member functions

(constructor)	constructs a`default_accessor` (public member function)
access	returns a n^th element provided by arguments (public member function)
offset	returns a data handle advanced by an offset value (public member function)

std::default_accessor::default_accessor

constexpr default_accessor()noexcept=default;	(1)
template<class OtherElementType> constexpr default_accessor( default_accessor<OtherElementType>)noexcept{}	(2)

1) Default constructs adefault_accessor.

2) Constructs adefault_accessor fromdefault_accessor<OtherElementType>. The constructor has no visible effect. This overload participates in overload resolution only ifstd::is_convertible_v<OtherElementType(*)[], element_type(*)[]> is true.