We should not maintain distinct (and possibly differently behaving) implementations of elementwise array casting and scalar casting. The new kernels framework provides for relatively easily generating kernels that can process arrays or scalars.

Reporter: Wes McKinney / @wesm

Related issues:

• [C++] C++ array kernels framework and execution buildout (umbrella issue) (is a child of)
• [C++] Implement casting of ListScalar (supercedes)

PRs and other links:

• GitHub Pull Request #9546

_{Note: This issue was originally created as ARROW-9006. Please see the migration documentation for further details.}