[ARROW-3332] [Gandiva] Remove usages of mutable reference out arguments

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: C++, C++ - Gandiva
• External issue URL: https://github.com/apache/arrow/issues/19667
• Assignee: Unassigned
• Reporter: Wes McKinney
• Created: 26/Sep/18 10:10
• Updated: 11/Jan/23 07:26

Description

I have noticed several usages of mutable reference out arguments, e.g. gandiva/regex_util.h. We should change these to conform to the style guide (out arguments as pointers)