[GROOVY-11125] withIndex().collect loses type parameters

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Duplicate
• Affects Version/s: 4.0.13
• Component/s: Static Type Checker
• Assignee: Eric Milles
• Reporter: Jason Garrett
• Created: 13/Jul/23 13:54
• Updated: 24/Jul/23 12:33
• Resolved: 13/Jul/23 16:45

Description

With static compilation, the types of the parameters to withIndex().collect{} are lost.

This example fails to compile:

import groovy.transform.CompileStatic

@CompileStatic  // compiles without this
class WithIndexCollectParameters {

    List<String> myList = []

    void myMethod() {
       myList.withIndex().collect { String str, int idx ->  // [Static type checking] - Expected type java.lang.Object for closure parameters
          true
       }
    }
}

Issue Links

• is related to: GROOVY-11089 STC: closure param type inference for array and list
• is related to: GROOVY-11124 iterating Tuple2s loses type parameters
• is related to: GROOVY-11090 STC: closure param type inference for tuple
• relates to: GROOVY-11135 Unable to compile: Expected type java.lang.Object for closure parameter