[GROOVY-9146] Seems to be a gap in method reference support

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 4.0.0-alpha-1, 3.0.6
• Assignee: Paul King
• Reporter: Paul King
• Created: 26/May/19 14:12
• Updated: 11/Nov/20 02:01
• Resolved: 14/Sep/20 04:19

Description

With the class definition, it appears to produce the correct output:

@groovy.transform.CompileStatic
class Foo {
  static void main(args) {
    Function<String, String> lower = String::toLowerCase
    println "lower = $lower" // => Foo$$Lambda$14/0x0000000801205040@7bd4937b
  }
}

Removing to make it a script method gives:

@groovy.transform.CompileStatic
//class Foo {
  static void main(args) {
    Function<String, String> lower = String::toLowerCase
    println "lower = $lower" // => org.codehaus.groovy.runtime.MethodClosure@4cdd2c73
  }
//}

I don't know whether it is a gap in method reference handling or does the @CompileStatic annotation get lost on the special script main method when we override. Still to be investigate but we either need to fix or document.