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https://issues.apache.org/jira/browse/ARROW-2063?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16552724#comment-16552724
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Antoine Pitrou commented on ARROW-2063:
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Instead of adding a whole new class for it, how about a new
{{FixedSizeBufferWriter}} method that returns a {{BufferReader}} over the
underlying buffer? Perhaps {{FixedSizeBufferWriter::GetReader}}.
> [C++] Implement variant of FixedSizeBufferWriter that also supports reading
> (like MemoryMappedFile)
> ---------------------------------------------------------------------------------------------------
>
> Key: ARROW-2063
> URL: https://issues.apache.org/jira/browse/ARROW-2063
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Wes McKinney
> Priority: Major
> Fix For: 0.11.0
>
>
> This would be helpful for testing, among other things
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