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Fix reduce by key for non default initializable iterators #1827

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Nov 15, 2022
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Fix reduce by key for non default initializable iterators #1827

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5 changes: 3 additions & 2 deletions thrust/system/cuda/detail/reduce_by_key.h
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Original file line number Diff line number Diff line change
Expand Up @@ -1079,12 +1079,13 @@ namespace __reduce_by_key {

size_type num_items = thrust::distance(keys_first, keys_last);

pair<KeysOutputIt, ValuesOutputIt> result = thrust::make_pair(keys_output, values_output);

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if (num_items == 0)
{
return thrust::make_pair(keys_output, values_output);
return result;
}

pair<KeysOutputIt, ValuesOutputIt> result{};
THRUST_INDEX_TYPE_DISPATCH(result,
reduce_by_key_dispatch,
num_items,
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