felipecrv commented on code in PR #42067:
URL: https://github.com/apache/arrow/pull/42067#discussion_r1636595460
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cpp/src/arrow/compute/kernels/scalar_nested.cc:
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@@ -196,6 +196,9 @@ struct ListSlice {
constexpr auto kInputTypeId = InListType::type_id;
auto output_type = output_type_holder.GetSharedPtr();
switch (output_type->id()) {
+ // The various `if constexpr` guards below avoid generating
+ // ListSlice<InListType>::BuildArray<ListBuilder> specializations
+ // that will never be invoked at runtime.
Review Comment:
Thanks!
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