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https://issues.apache.org/jira/browse/GROOVY-7727?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15123730#comment-15123730
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Aseem Bansal commented on GROOVY-7727:
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I tried your code in Java.
\Uxxx failed in java also https://ideone.com/W99GOs
And that line says "provides a code point input method which accepts strings".
So there is a specific method which accepts this format.
So this is not a bug. If you find the method name please do share.
> Cannot create unicode sequences using \Uxxxxxx
> ----------------------------------------------
>
> Key: GROOVY-7727
> URL: https://issues.apache.org/jira/browse/GROOVY-7727
> Project: Groovy
> Issue Type: Bug
> Components: Compiler
> Affects Versions: 2.4.5
> Reporter: Andres Almiray
>
> According to
> http://www.oracle.com/technetwork/articles/java/supplementary-142654.html
> "For text input, the Java 2 SDK provides a code point input method which
> accepts strings of the form "\Uxxxxxx", where the uppercase "U" indicates
> that the escape sequence contains six hexadecimal digits, thus allowing for
> supplementary characters. A lowercase "u" indicates the original form of the
> escape sequences, "\uxxxx". You can find this input method and its
> documentation in the directory demo/jfc/CodePointIM of the J2SDK."
> The following code fails with a syntax exception
> s = "\U01f5d0"
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