[ https://issues.jboss.org/browse/CDI-494?page=com.atlassian.jira.plugin.sy... ] Antoine Sabot-Durand edited comment on CDI-494 at 3/14/16 9:22 AM: ------------------------------------------------------------------- Well guys, if it's technically possible to accept unbounded and bounded wildcards for events let's do it. It's probably a mistake to compare this restriction in event rules with restriction in type resolution for DI. This said, when I read JLS [1] and this sentence : {quote}Type arguments may be either reference types or wildcards. Wildcards are useful in situations where only partial knowledge about the type parameter is required.{quote} My understanding is that {{List<? extends Number>}} is similar to {{List<T extends Number>}}. The only difference is that in the first version we won't need type information later. OTHO {{List<?>}} (or {{List<? extends Object>}}) clearly defines a List containing any type... [1] https://docs.oracle.com/javase/specs/jls/se8/html/jls-4.html#jls-4.5.1 was (Author: antoinesabot-durand): Well guys, if it's technically possible to accept unbounded and bounded wildcards for events let's do it. It's probably a mistake to compare this restriction in event rules with restriction in type resolution for DI. This said, when I read JLS [1] and this sentence : {quote}Type arguments may be either reference types or wildcards. Wildcards are useful in situations where only partial knowledge about the type parameter is required.{quote} My understanding is that {{List<? extends Number>}} is similar to {{List<T extends Number>}}. The only difference is that in the first version we won't need type information later. OTHO List<?> (or List<? extends Object>) clearly defines a List containing any type... [1] https://docs.oracle.com/javase/specs/jls/se8/html/jls-4.html#jls-4.5.1 -- This message was sent by Atlassian JIRA (v6.4.11#64026)