[jira] [Created] (GROOVY-10000) Traits should be able to hold constants

["Christopher Smith (Jira)" <ji...@apache.org>]

Christopher Smith created GROOVY-10000:
------------------------------------------

             Summary: Traits should be able to hold constants
                 Key: GROOVY-10000
                 URL: https://issues.apache.org/jira/browse/GROOVY-10000
             Project: Groovy
          Issue Type: Improvement
          Components: Compiler
    Affects Versions: 3.0.7
            Reporter: Christopher Smith


I can define constants on plain old interfaces; since they're implicitly {{public static final}}, just {{String PREFIX = 'asdf_'}} will get the job done.

However, in a trait, while I can declare a constant and use it within the trait, I can't access that constant from outside the trait. Instead, I get this error (in static mode for better message; dynamic mode generates bytecode demonstrating the same semantic error):

{code:groovy}
doStuff(MyTrait.PREFIX, data)
{code}

{code}
[Static type checking] - No such property: PREFIX for class: java.lang.Class <com.example.MyTrait>
{code}

The compiler seems to be treating what should be a distinct symbol {{MyTrait.PREFIX}} as a property access on the class {{MyTrait}}. I expected the {{PREFIX}} constant to be copied to the generated interface {{.class}} file and available as it would be on an interface. Instead, it appears that it's being put into the {{$Trait$Helper.class}} file. Perhaps the trait AST needs a special rule to recognize constants and route them suitably?



--
This message was sent by Atlassian Jira
(v8.3.4#803005)