NAME¶

std::default_accessor - std::default_accessor

Synopsis¶

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

The std::default_accessor class template is the default AccessorPolicy used by
std::mdspan if no user-specified accessor policy is provided.

Each specialization of default_accessor models semiregular and is TriviallyCopyable.

Template parameters¶

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

Member types¶

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

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 that has an offset provided by arguments
(public member function)

std::default_accessor::default_accessor

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

1) Default constructs a default_accessor.
2) Constructs a default_accessor from default_accessor<OtherElementType>. The
constructor has no visible effect. This overload participates in overload resolution
only if std::is_convertible_v<OtherElementType(*)[], element_type(*)[]> is true.

std::default_accessor::access

constexpr reference access( data_handle_type p, std::size_t i ) const noexcept;

Equivalent to return p[i];.

std::default_accessor::offset

constexpr data_handle_type offset( data_handle_type p, std::size_t i ) const
noexcept;

Equivalent to return p + i;.

Example¶

This section is incomplete
Reason: no example

Category:¶

* Todo no example