std::default_accessor
From cppreference.com
| Defined in header <mdspan>
|
||
| template< class ElementType > class default_accessor; |
(since C++23) | |
A specialization of 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
| 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 |
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 nth 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 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 |