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From "Daniel Sun (Jira)" <j...@apache.org>
Subject [jira] [Created] (GROOVY-9293) CLONE - Compilation error when accessing a protected(via `thisObject`, `owner` and `delegate`)/package-private super class field from inside a closure
Date Mon, 28 Oct 2019 14:14:00 GMT
Daniel Sun created GROOVY-9293:
----------------------------------

             Summary: CLONE - Compilation error when accessing a protected(via `thisObject`,
`owner` and `delegate`)/package-private super class field from inside a closure
                 Key: GROOVY-9293
                 URL: https://issues.apache.org/jira/browse/GROOVY-9293
             Project: Groovy
          Issue Type: Bug
          Components: Static compilation
    Affects Versions: 2.5.8, 3.0.0-rc-1
            Reporter: Daniel Sun
            Assignee: Daniel Sun
             Fix For: 3.0.0-rc-2


Compilation fails when accessing a protected(via `thisObject`, `owner` and `delegate`)/package-private
super class field from inside a closure:
{code:java}
GroovyShell shell = new GroovyShell()
shell.evaluate('''
    package a
    
    import groovy.transform.CompileStatic
    
    @CompileStatic
    abstract class Abstract_Class {
        protected String protectedField = 'field' // `@PackageScope` fails too
        
        abstract String doThing()
    }
    assert true''')

shell.evaluate('''
    package b
    
    import a.Abstract_Class
    import groovy.transform.CompileStatic
    
    @CompileStatic
    class ConcreteClass extends Abstract_Class {
       
        @Override
        String doThing() {
            'something'.with {
                return owner.protectedField // `thisObject.protectedField`, `delegate.protectedField`
fails too
            }
        }
    }
    assert true''')

shell.evaluate("assert new b.ConcreteClass().doThing() == 'field'")
{code}


*Note:* accessing a package-private super class field from inside a closure via `this` still
fails, we will open a new ticket to track it:
{code:java}
       GroovyShell shell = new GroovyShell()
        shell.evaluate('''
            package a
            
            import groovy.transform.CompileStatic
            
            @CompileStatic
            abstract class Abstract_Class {
                @groovy.transform.PackageScope String superField = 'field'
                
                abstract String doThing()
            }
            assert true
        ''')

        shell.evaluate('''
            package a
            
            import a.Abstract_Class
            import groovy.transform.CompileStatic
            
            @CompileStatic
            class ConcreteClass extends Abstract_Class {
               
                @Override
                String doThing() {
                    this.with {
                        return this.superField
                    }
                }
            }
            assert true
        ''')

        shell.evaluate("assert new a.ConcreteClass().doThing() == 'field'")
{code}





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