[ARROW-14083] [C++] Vendor a span implementation

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: C++
• External issue URL: https://github.com/apache/arrow/issues/29678
• Assignee: Unassigned
• Reporter: Ben Kietzman
• Created: 22/Sep/21 18:12
• Updated: 11/Jan/23 08:37

Description

std::span is a basic vocabulary type which won't be available to us until c++20. We should vendor an implementation similar to our util::optional