[GROOVY-7927] Static type checking

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.4.7
• Fix Version/s: 2.4.8
• Component/s: Static compilation
• Assignee: Jochen Theodorou
• Reporter: Cazacu Mihai
• Created: 02/Sep/16 19:04
• Updated: 01/Feb/17 23:18
• Resolved: 03/Sep/16 10:50

Description

I have a problem running this code:

Test.groovy

import groovy.transform.CompileStatic 
import java.util.function.Function 
  
@CompileStatic 
class Test { 
        static void main(String[] args) { 
               // this code fails 
                Function<Integer, Integer> fct = { Integer n -> 
                        -n 
                } 
  
                // this one works but it is too verbose 
                // Function<Integer, Integer> fct = ({ Integer n -> 
                // -n 
                // } as Function<Integer, Integer>) 
  
                println fct.apply(10) 
        } 
} 

Error:

Test.groovy: 9: [Static type checking] - Incompatible generic argument types. Cannot assign java.util.function.Function <java.lang.Integer, groovy.lang.Closure> to: java.util.function.Function <Integer, Integer>
@ line 9, column 36.
Function<Integer, Integer> fct = { Integer n ->
^
1 error

Issue Links

• relates to: GROOVY-7748 SAM & @CompileStatic failure