felipecrv commented on code in PR #35345:
URL: https://github.com/apache/arrow/pull/35345#discussion_r1364416202
##########
cpp/src/arrow/array/builder_nested.h:
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@@ -115,8 +138,16 @@ class ARROW_EXPORT VarLengthListLikeBuilder : public
ArrayBuilder {
return Status::OK();
}
+ /// \brief Append an empty list slot
+ ///
+ /// \post Another call to Append* or Finish should be made before appending
to
+ /// the values builder to ensure list slot remains empty
Review Comment:
Note that this was already an unwritten contract when there were only
regular list builders.
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