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https://issues.apache.org/jira/browse/GROOVY-8810?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eric Milles resolved GROOVY-8810.
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Resolution: Information Provided
> Groovy doesn't support concatenation symbol at line start
> ---------------------------------------------------------
>
> Key: GROOVY-8810
> URL: https://issues.apache.org/jira/browse/GROOVY-8810
> Project: Groovy
> Issue Type: Bug
> Components: Compiler
> Reporter: ori marko
> Priority: Major
>
> Groovy doesn't support concatenation using + or << *at line start*,
> Use case: Need to concatenate a many variables and want to make it readable,
> but failed to separate lines similar to java
> 1. Java supported code:
> String text= "0"+"1" +
> "2"
> +"3";
>
> Error:
> javax.script.ScriptException: groovy.lang.MissingMethodException: No
> signature of method: java.lang.String.positive() is applicable for argument
> types: () values: []
> Possible solutions: notify(), tokenize(), size(), size()
>
> 2. groovy concatenation split in new line(s):
> {{String text ="<id>" <<vars["id1"] << "<id><id2>" }}
> {{<< vars["id2"] << "<id2>";}}
> {{Error:}}
> Caused by: org.codehaus.groovy.control.MultipleCompilationErrorsException:
> startup failed:
> Script1.groovy: 2: unexpected token: << @ line 2, column 1.
> << vars["id2"] << "<id2>"
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