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https://issues.apache.org/jira/browse/GROOVY-9968?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eric Milles updated GROOVY-9968:
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Fix Version/s: 3.0.8
> @TypeChecked Error: Members of Iterable<T extends Foo> are Foo, not Object
> --------------------------------------------------------------------------
>
> Key: GROOVY-9968
> URL: https://issues.apache.org/jira/browse/GROOVY-9968
> Project: Groovy
> Issue Type: Bug
> Components: Compiler
> Affects Versions: 3.0.7
> Environment: Windows 10
> jdk-11.0.10.9-hotspot
> IntelliJ 2020.3.2
> Reporter: mgroovy
> Assignee: Eric Milles
> Priority: Major
> Fix For: 3.0.8, 4.0.0-alpha-3
>
> Time Spent: 40m
> Remaining Estimate: 0h
>
> *Problem*
> Trying to build the sample test code below fails with:
> {code:java}
> Groovyc: [Static type checking] - No such property: name for class:
> java.lang.Object
> Groovyc: Expected parameter of type java.lang.Object but got
> simple.groovy.bugs.groovy3.gb_2021_03_05.iterable_t_extends.Foo
> Groovyc: [Static type checking] - No such property: name for class:
> java.lang.Object
> {code}
> If we do not explicitly give the member type of the IterableTExtendsFoo
> iterable, Groovy assumes that the type is Object, even though it has been
> defined as being a subclass of Foo in the definition of IterableTExtendsFoo<T
> extends Foo>.
> *Expected*
> * Code should compile.
> * If Groovy could not deduce that IterableTExtendsFoo has been initialized
> with a List<T extends Foo>, then it should reject the line where the
> IterableTExtendsFoo ctor is called.
> * Note: Works as expected in Groovy 2.5.x (at least up to 2.5.14)
> *Sample Code*
> {code:java}
> import groovy.transform.TypeChecked
> import org.junit.Ignore
> import org.junit.Test
> @TypeChecked
> class Groovy3_Iterable_T_extends_Bug {
> @Test
> @Ignore
> void 'Groovy 3-0-7 Members of Iterable T extends Foo are Foo'() {
> // Compiler should reject the following line if the ctor arg
> would not of type List<T extends Foo>
> final iterableTExtendsFoo = new IterableTExtendsFoo([new
> Foo('Sli'),new Foo('Msha'),new Foo('Dy'),])
> //final iterableTExtendsFoo = new IterableTExtendsFoo<Foo>([new
> Foo('Sli'),new Foo('Msha'),new Foo('Dy'),]) // Explicitly giving the iterable
> member type makes the code compile
> println iterableTExtendsFoo.collect { "Hi, my name is:
> $it.name" }
> println iterableTExtendsFoo.collect { Foo f -> "name=$f.name" }
> }
> }
> {code}
> {code:java}
> @Canonical class Foo { String name }
> {code}
> {code:java}
> @Canonical
> class IterableTExtendsFoo<T extends Foo> implements Iterable<T> {
> List<T> foos
> @Override Iterator<T> iterator() { foos.iterator() }
> }
> {code}
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