Eric Milles created GROOVY-11305:
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             Summary: STC: support for-each or for-in loop for 
implicitly-Iterable type
                 Key: GROOVY-11305
                 URL: https://issues.apache.org/jira/browse/GROOVY-11305
             Project: Groovy
          Issue Type: Improvement
          Components: Static Type Checker
            Reporter: Eric Milles
            Assignee: Eric Milles


Consider the following:
{code:groovy}
class C { // implicitly Iterable<String>
  Iterator<String> iterator() {}
}

@TypeChecked
void test(C c) {
  for (string in c) {
    string.toUpperCase()
  }
}
{code}

If "@TypeChecked" is removed, this works.  STC cannot determine the loop 
element type -- see {{StaticTypeCheckingVisitor#inferLoopElementType}} and 
compare with {{inferComponentType}} which runs for spread.



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