[C++] Implement JSON round trip for DictionaryArray #16104
Description
Reporter: Wes McKinney / @wesm
Assignee: Wes McKinney / @wesm
Related issues:
- Java<->C++ Integration tests for dictionary-encoded vectors (blocks)
- Arrow 0.5.0 release (blocks)
- [C++] Implement dictionary-encoded array container (depends upon)
Note: This issue was originally created as ARROW-460. Please see the migration documentation for further details.