[GROOVY-8309] Cannot DGM.plus() two lists with different types

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Assignee: Unassigned
• Reporter: Daniil Ovchinnikov
• Created: 05/Sep/17 15:33
• Updated: 08/Apr/22 15:17

Description

Java

void foo(List<String> s, List<Integer> i) {
  DefaultGroovyMethods.plus(s, i);
}

Expected: Javac should infer return type as List<Serializable>, but it can't.
Possible fix: define DGM.plus with wildcard types ? extends T

Issue Links

• relates to: GROOVY-8425 DefaultGroovyMethods don't utilize wildcards