[ARROW-12009] [C++] Then(const Result<T>&) should run on failure or success

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Not A Problem
• Component/s: C++
• Labels: async-util
• External issue URL: https://github.com/apache/arrow/issues/27840
• Assignee: Weston Pace
• Reporter: Weston Pace
• Created: 17/Mar/21 21:03
• Updated: 11/Jan/23 08:23
• Resolved: 23/Jul/21 17:58

Description

Adding two callbacks can lead to dense difficult to read code.  If the caller asks for a result then it should be easy to let the callback handle both the failure and the success case.