[jira] [Created] (ARROW-12612) [C++][Compute] Add Expression to type_fwd.h

[David Li (Jira)]

David Li created ARROW-12612:
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             Summary: [C++][Compute] Add Expression to type_fwd.h
                 Key: ARROW-12612
                 URL: https://issues.apache.org/jira/browse/ARROW-12612
             Project: Apache Arrow
          Issue Type: Improvement
          Components: C++
            Reporter: David Li
            Assignee: David Li


Fixes the r-minimal build.



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