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https://issues.apache.org/jira/browse/ARROW-2224?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16433957#comment-16433957
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ASF GitHub Bot commented on ARROW-2224:
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pitrou commented on issue #1880: ARROW-2224: [C++] Remove boost-regex dependency
URL: https://github.com/apache/arrow/pull/1880#issuecomment-380464846
I took it from here:
> isdigit and isxdigit are the only standard narrow character classification
functions that are not affected by the currently installed C locale. although
some implementations (e.g. Microsoft in 1252 codepage) may classify additional
single-byte characters as digits.
http://en.cppreference.com/w/cpp/string/byte/isdigit
Not sure how authoritative that page is.
That said, `static_cast<bool>(std::isdigit(c))` is not very pretty.
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> [C++] Replace boost regex usage with libre2
> -------------------------------------------
>
> Key: ARROW-2224
> URL: https://issues.apache.org/jira/browse/ARROW-2224
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Phillip Cloud
> Assignee: Phillip Cloud
> Priority: Major
> Labels: pull-request-available
>
> We're using {{boost::regex}} to parse decimal strings for {{decimal128}}
> types. We should use {{libre2}} instead.
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