bkietz commented on a change in pull request #7026:
URL: https://github.com/apache/arrow/pull/7026#discussion_r417364778
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File path: cpp/src/arrow/dataset/filter.h
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@@ -191,6 +197,10 @@ class ARROW_DS_EXPORT Expression {
/// returns a debug string representing this expression
virtual std::string ToString() const = 0;
+ /// serialize/deserialize an Expression.
+ Result<std::shared_ptr<Buffer>> Serialize() const;
Review comment:
I'll translate the python tests into a case in filter_test.cc
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