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https://issues.apache.org/jira/browse/GROOVY-5399?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17757470#comment-17757470
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Paul King commented on GROOVY-5399:
-----------------------------------
For those interested in this topic, see GROOVY-2521 and GROOVY-11143. These
don't try to make it automatic but rather make it very simple.
> Automatically provide instance methods on objects when another class has a
> static method with the object as first argument
> --------------------------------------------------------------------------------------------------------------------------
>
> Key: GROOVY-5399
> URL: https://issues.apache.org/jira/browse/GROOVY-5399
> Project: Groovy
> Issue Type: New Feature
> Components: Compiler
> Reporter: Dr. Russel Winder
> Assignee: Jochen Theodorou
> Priority: Major
>
> The script:
> {code}
> number = 27
> println number.toHexString ( )
> {code}
> results in the message:
> {quote}
> Caught: groovy.lang.MissingMethodException: No signature of method:
> java.lang.Integer.toHexString() is applicable for argument types: () values:
> []
> Possible solutions: toHexString(int), toString(), toString(), toString(),
> toString(int), toString(int, int)
> groovy.lang.MissingMethodException: No signature of method:
> java.lang.Integer.toHexString() is applicable for argument types: () values:
> []
> Possible solutions: toHexString(int), toString(), toString(), toString(),
> toString(int), toString(int, int)
> at toHexString_Problem.run(toHexString_Problem.groovy:5)
> {quote}
> The reason is that _toHexString_ is defined as a static method on the types
> and not within the GroovyJDK. I believe that it is more usable for
> prograqmmers, more appropriate to a dynamic language, and generally more
> Groovy to allow the method to operate on a reference to an object and only
> raise an exception if the object is not of an appropriate type.
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