[GROOVY-10889] Casting of arguments in @NamedVariant method has no effect

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 4.0.6
• Fix Version/s: 4.0.8
• Labels: named-parameters

Language

groovy

• Assignee: Eric Milles
• Reporter: Pavlo Shevchenko
• Created: 29/Dec/22 13:40
• Updated: 26/Feb/24 19:23
• Resolved: 03/Jan/23 20:07

Description

import groovy.transform.NamedVariant

class Reproducer {

    @NamedVariant
    private static Tuple2<Integer, Set<String>> createSampleData(
        Integer left = 0,
        Set<String> right = [] as Set
    ) {
        Tuple2.tuple(left, right)
    }

    static void main(String[] args) {
        createSampleData(left: 1)
    }
}

The default value of "right" argument (i.e. "[] as Set") is detected as "ArrayList" despite the explicit cast. This used to work in Groovy 3.x, and now fails with

Exception in thread "main" groovy.lang.MissingMethodException: No signature of method: static dev.pshevche.Reproducer.createSampleData() is applicable for argument types: (Integer, ArrayList) values: [1, []]

Replacing the "[] as Set" with "new HashSet<>()" resolves the issue.

Issue Links

• is related to: GROOVY-10561 @NamedVariant self referential default values are not correctly resolved
• relates to: GROOVY-11325 @NamedVariant self referential default values are not correctly resolved when calculations are involved