Romain François created ARROW-3802:
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             Summary: [C++] Cast to half float missing
                 Key: ARROW-3802
                 URL: https://issues.apache.org/jira/browse/ARROW-3802
             Project: Apache Arrow
          Issue Type: Bug
          Components: C++
            Reporter: Romain François


{code:java}
library(reticulate)
pa <- import("pyarrow")
pa$array(c(1,2,3))$cast(pa$float16())
#> Error in py_call_impl(callable, dots$args, dots$keywords): 
ArrowNotImplementedError: No cast implemented from double to halffloat
#> 
#> Detailed traceback: 
#> File "pyarrow/array.pxi", line 277, in pyarrow.lib.Array.cast 
(/Users/travis/build/BryanCutler/arrow-dist/arrow/python/build/temp.macosx-10.6-intel-3.6/lib.cxx:30459)
#> File "pyarrow/error.pxi", line 85, in pyarrow.lib.check_status 
(/Users/travis/build/BryanCutler/arrow-dist/arrow/python/build/temp.macosx-10.6-intel-3.6/lib.cxx:8570)

{code}



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