pitrou commented on code in PR #47297: URL: https://github.com/apache/arrow/pull/47297#discussion_r2284725340
########## cpp/src/arrow/compute/kernel.h: ########## @@ -348,7 +348,24 @@ class ARROW_EXPORT OutputType { Resolver resolver_ = NULLPTR; }; -/// \brief Holds the input types and output type of the kernel. +/// \brief Additional constraints to apply to the input types of a kernel when matching a +/// specific kernel signature. +class ARROW_EXPORT MatchConstraint { + public: + virtual ~MatchConstraint() = default; + + /// \brief Return true if the input types satisfy the constraint. + virtual bool Matches(const std::vector<TypeHolder>& types) const = 0; Review Comment: Of course we can also have an API that creates a `MatchConstraint` from a `std::function`, for convenience. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: github-unsubscr...@arrow.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org