Benjamin Kietzman created ARROW-4698:
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Summary: [C++] Let StringBuilder be constructible with a pre
allocated buffer for character data
Key: ARROW-4698
URL: https://issues.apache.org/jira/browse/ARROW-4698
Project: Apache Arrow
Issue Type: New Feature
Reporter: Benjamin Kietzman
Assignee: Benjamin Kietzman
This is useful for example when an existing buffer can be immediately reused.
This is currently used for [storage of strings in json
parsing](https://github.com/apache/arrow/blob/master/cpp/src/arrow/json/parser.cc#L60),
so it'd be straightforward to refactor into a constructor of StringBuilder.
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