save-buffer commented on a change in pull request #11579:
URL: https://github.com/apache/arrow/pull/11579#discussion_r747074499
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File path: cpp/src/arrow/compute/exec/expression.h
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@@ -91,6 +91,9 @@ class ARROW_EXPORT Expression {
/// Return true if this expression could evaluate to true.
bool IsSatisfiable() const;
+ /// Return true if this expression has no clauses.
+ bool IsEmpty() const;
Review comment:
Right, so I'd argue the solution is to make `Expression defaulted;`
valid. Anyway, this is probably out of scope for this PR.
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