bkietz commented on a change in pull request #9294:
URL: https://github.com/apache/arrow/pull/9294#discussion_r571184083
##########
File path: cpp/src/arrow/compute/kernels/common.h
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@@ -51,4 +51,16 @@ namespace arrow {
using internal::checked_cast;
using internal::checked_pointer_cast;
+namespace compute {
+namespace detail {
+
+/// \brief Look up a kernel in a function. If no Kernel is found, nullptr is
returned.
+ARROW_EXPORT
+const Kernel* DispatchExactImpl(const Function* func, const
std::vector<ValueDescr>&);
+
+ARROW_EXPORT
+Status NoMatchingKernel(const Function* func, const std::vector<ValueDescr>&);
Review comment:
These are defined in `function.cc`. I'll move the declarations to
`function.h`
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