A non-owning, immutable view of device data that represents a list of elements of arbitrary type (including further nested lists). More...
Classes | |
| struct | pair_accessor |
pair accessor for elements in a list_device_view More... | |
| struct | pair_rep_accessor |
pair rep accessor for elements in a list_device_view More... | |
Public Types | |
| template<typename T > | |
| using | const_pair_iterator = thrust::transform_iterator< pair_accessor< T >, thrust::counting_iterator< cudf::size_type > > |
| template<typename T > | |
| using | const_pair_rep_iterator = thrust::transform_iterator< pair_rep_accessor< T >, thrust::counting_iterator< cudf::size_type > > |
Public Member Functions | |
| list_device_view (lists_column_device_view const &lists_column, size_type const &row_index) | |
| size_type | element_offset (size_type idx) const |
| Fetches the offset in the list column's child that corresponds to the element at the specified list index. More... | |
| template<typename T > | |
| T | element (size_type idx) const |
| Fetches the element at the specified index within the list row. More... | |
| bool | is_null (size_type idx) const |
| Checks whether element is null at specified index in the list row. | |
| bool | is_null () const |
| Checks whether this list row is null. | |
| size_type | size () const |
| Fetches the number of elements in this list row. | |
| lists_column_device_view const & | get_column () const |
| Fetches the lists_column_device_view that contains this list. | |
| template<typename T > | |
| const_pair_iterator< T > | pair_begin () const |
| Fetcher for a pair iterator to the first element in the list_device_view. More... | |
| template<typename T > | |
| const_pair_iterator< T > | pair_end () const |
| Fetcher for a pair iterator to one position past the last element in the list_device_view. | |
| template<typename T > | |
| const_pair_rep_iterator< T > | pair_rep_begin () const |
| Fetcher for a pair iterator to the first element in the list_device_view. More... | |
| template<typename T > | |
| const_pair_rep_iterator< T > | pair_rep_end () const |
| Fetcher for a pair iterator to one position past the last element in the list_device_view. | |
A non-owning, immutable view of device data that represents a list of elements of arbitrary type (including further nested lists).
Definition at line 29 of file list_device_view.cuh.
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inline |
Fetches the element at the specified index within the list row.
| T | The type of the list's element. |
| idx | The index into the list row |
Definition at line 86 of file list_device_view.cuh.
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inline |
Fetches the offset in the list column's child that corresponds to the element at the specified list index.
Consider the following lists column: [ [0,1,2], [3,4,5], [6,7,8] ]
The list's internals would look like: offsets: [0, 3, 6, 9] child : [0, 1, 2, 3, 4, 5, 6, 7, 8]
The second list row (i.e. row_index=1) is [3,4,5]. The third element (i.e. idx=2) of the second list row is 5.
The offset of this element as stored in the child column (i.e. 5) may be fetched using this method.
Definition at line 72 of file list_device_view.cuh.
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inline |
Fetcher for a pair iterator to the first element in the list_device_view.
Dereferencing the returned iterator yields a thrust::pair<T, bool>.
If the element at index i is valid, then for p = iter[i],
p.first is the value of the element at ip.second == trueIf the element at index i is null,
p.first is undefinedp.second == false Definition at line 147 of file list_device_view.cuh.
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inline |
Fetcher for a pair iterator to the first element in the list_device_view.
Dereferencing the returned iterator yields a thrust::pair<rep_type, bool>, where rep_type is device_storage_type_t<T>, the type used to store the value on the device.
If the element at index i is valid, then for p = iter[i],
p.first is the value of the element at ip.second == trueIf the element at index i is null,
p.first is undefinedp.second == false Definition at line 179 of file list_device_view.cuh.
1.8.20