mapleFU commented on code in PR #133:
URL: https://github.com/apache/iceberg-cpp/pull/133#discussion_r2177674438
##########
src/iceberg/file_reader.h:
##########
@@ -50,66 +49,11 @@ class ICEBERG_EXPORT Reader {
/// \brief Read next data from file.
///
- /// \return std::monostate if the reader has no more data, otherwise
`ArrowArray` or
- /// `StructLike` depending on the data layout by the reader implementation.
- using Data =
- std::variant<std::monostate, ArrowArray, std::reference_wrapper<const
StructLike>>;
- virtual Result<Data> Next() = 0;
+ /// \return std::nullopt if the reader has no more data, otherwise
`ArrowArray`.
Review Comment:
Minor: can ArrowArray be empty? Does empty array means ending? Or it can
have data left?
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