ORC-429: [C++] Refactor code in TypeImpl.cc
ORC-429: [C++] Refactor code in TypeImpl.cc

omalley/orc,apache/orc,omalley/orc,apache/orc,apache/orc,apache/orc,apache/orc,apache/orc,omalley/orc,omalley/orc,omalley/orc,omalley/orc,apache/orc,omalley/orc,apache/orc