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https://issues.apache.org/jira/browse/DAFFODIL-1981?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16660722#comment-16660722
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Josh Adams commented on DAFFODIL-1981:
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This is something that worked in ICU4J v58.2, but was broken in v59.1 during a
major rewrite of the number handling. However, a parseNoExponent setting has
been added to DecimalFormat that supposedly will enable handling of empty
string exponents, but it is currently marked as deprecated due to its
experimental status. It is supposed to be moved out of experimental status in
the near future.
http://bugs.icu-project.org/trac/ticket/11725
> Support for textStandardExponentRep="" missing
> ----------------------------------------------
>
> Key: DAFFODIL-1981
> URL: https://issues.apache.org/jira/browse/DAFFODIL-1981
> Project: Daffodil
> Issue Type: Bug
> Components: Back End
> Affects Versions: 2.2.0
> Reporter: Steve Lawrence
> Assignee: Josh Adams
> Priority: Major
>
> The DFDL specification states if testStandardExponentRep is the empty string,
> then no exponent character separates the mantissa from the exponent, allowing
> numbers like "123+2" to be valid. However, the version of ICU used by
> Daffodil does not handle the empty string expontent rep correctly, and so
> this feature is missing.
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