[ARROW-9543] [C++] Simplify parsing/conversion utilities

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 0.17.1
• Component/s: C++
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/25610
• Assignee: Unassigned
• Reporter: Ben Kietzman
• Created: 22/Jul/20 18:20
• Updated: 11/Jan/23 08:07

Description

Various improvement ideas extracted from https://github.com/apache/arrow/pull/7793 , see https://github.com/apache/arrow/commit/740d8132d3220b0bcddde138bd1ab70030e227fd

• provide a convenience function FormatValue() to complement ParseValue()
• parameterize both parsing and formatting with the corresponding DataType subclass (for example a formatting or parsing a timestamp requires a TimeUnit and this can be derived from a TimestampType)
• rename StringConverter and StringFormatter to ParseValueTraits and FormatValueTraits, to emphasize the convenience functions as the preferred interface
• ParseValue should accept a string_view for simplicity, and an overload should be provided which returns an optional<>

Issue Links

• links to: GitHub Pull Request #7901