[jira] [Created] (GROOVY-8121) Clarification on selection of category method or instance method in case of a tie

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[jira] [Created] (GROOVY-8121) Clarification on selection of category method or instance method in case of a tie

JIRA jira@apache.org
Eric Milles created GROOVY-8121:
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             Summary: Clarification on selection of category method or instance method in case of a tie
                 Key: GROOVY-8121
                 URL: https://issues.apache.org/jira/browse/GROOVY-8121
             Project: Groovy
          Issue Type: Question
          Components: Documentation
            Reporter: Eric Milles
            Priority: Minor


I have been looking at Cateogry methods and noticed that one of the edge cases is that of a tie between a category method and an instance method.  Could you add a clarification to the docs how this case is handled?
http://groovy-lang.org/metaprogramming.html#categories

It appears from my testing that if there is a tie between a category method and an instance method, the category method is chosen at runtime.
Example:
{code}
class Cat {
  static void meth(Main m) {}
}

class Main {
  void meth() {
    use (Cat) {
      meth() // this appears to be a call to Cat.meth
      this.meth() // this appears to be a call to Cat.meth
      this.meth // this appears to be a reference to Cat.meth
      // is there a way in this block to explicitly choose Main.meth ?
    }
  }
}
{code}

Also, does this rule hold up under TypeChecked or CompileStatic?

Lastly, default groovy methods seem related.  I think if there is a tie between a default groovy method and an instance method, the instance method is preferred.  I checks this with List.sort(Comparator), which is now available in Java 8.

Is the difference of preferring the category method in one case and the instance method in the other case intended?  I would prefer the instance method be selected in both cases.



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