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From Sébastien Collin (JIRA) <j...@apache.org>
Subject [jira] [Created] (GROOVY-7909) Calling parents method from trait using Parent.super.method() fail depending on trait declaration order
Date Tue, 16 Aug 2016 17:02:20 GMT
Sébastien Collin created GROOVY-7909:
----------------------------------------

             Summary: Calling parents method from trait using Parent.super.method() fail depending
on trait declaration order
                 Key: GROOVY-7909
                 URL: https://issues.apache.org/jira/browse/GROOVY-7909
             Project: Groovy
          Issue Type: Bug
          Components: Compiler
    Affects Versions: 2.4.7
         Environment: Grails 3.1.9
            Reporter: Sébastien Collin


I'm using trait for multiple inheritance and I faced an issue when compiling my project (using
Grails 3.1.9, so with the gradle task CompileGroovy).
My traits are sharing a common method ({{def method()}}) and I'm referencing parent's version
through ParentClassName.super.method()

I'm seeing this error:
{quote}
> BUG! exception in phase 'semantic analysis' in source unit 'xxx.groovy' ClassNode#getTypeClass
for YYY is called before the type class is set
{quote}

When testing different cases it seems that this problem appears because classes are not compiled
in the right order.

For example, a script with 
{code}
trait Three implements One, Two {
    def postMake() {
        One.super.postMake()
        Two.super.postMake()
        println "Three"
    }
}
trait One {
    def postMake() { println "One"}
}
trait Two {
    def postMake() { println "Two"}
}
class Four implements Three {
    def make() {
        Three.super.postMake()
        println "All done?"
    }
}
Four f = new Four()
f.make()
{code}
will fail, whereas putting Three method after One and Two will succeed.
Beside, keeping this trait's declaration order but changing method names to be unique (and
removing {{XXX.super}}) will compile and execute correctly.

I hope I'm clear enough...



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