std::default_accessor
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Defined in header
<mdspan> |
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template< class ElementType >
class default_accessor; |
(since C++23) | |
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
| 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
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(constructor)
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constructs a default_accessor(public member function) |
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access
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returns a nth element provided by arguments (public member function) |
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offset
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returns a data handle that has an offset provided by arguments (public member function) |
std::default_accessor::default_accessor
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constexpr default_accessor() noexcept = default;
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(1) | |
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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
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constexpr reference access(data_handle_type p, std::size_t i) const noexcept;
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Equivalent to return p[i];.
std::default_accessor::offset
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constexpr data_handle_type offset(data_handle_type p, std::size_t i) const noexcept;
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Equivalent to return p + i;.
Example
| This section is incomplete Reason: no example |