[GROOVY-9253] Comparison between Enum and other objects should fail

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Labels: enum
• Assignee: Unassigned
• Reporter: Xiaoguang Wang
• Created: 17/Sep/19 04:26
• Updated: 04/Nov/22 13:37

Description

In Java, comparison between Enum and other objects always triggers an error when compiling.

Groovy can follow the same behavior (at least in @CompileStatic mode) to keep consistency.

 

package com.company.test

import groovy.transform.CompileStatic

@CompileStatic
class TestEnumGroovy {
    enum E {
        a,b
    }
    static void main(String[] args) {
        E x = E.a
        String s = "A"

        System.out.print(x == s)  // it causes an error in Java. But Groovy doesn't see the error.
    }
}