[ARROW-584] [C++] Fix compiler warnings exposed with -Wconversion

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.3.0
• Component/s: C++
• External issue URL: https://github.com/apache/arrow/issues/16216
• Assignee: Wes McKinney
• Reporter: Wes McKinney
• Created: 25/Feb/17 21:13
• Updated: 11/Jan/23 07:09
• Resolved: 27/Feb/17 07:15

Description

We have a number of imprecise or implicit integer conversions – it would be good to address all of these warnings, and additionally to build with -Wconversion in Travis CI so we keep the build clean going forward.

Some of these warnings may so away as part of ARROW-493 but there are many others.