Static variable in Events

[GlennCich]

I need a unique identifier for a specific event. A way to do this is by creating a static variable.

event e 
{
    static var uniqueIdCounter : long
    val uniqueId : long
    new()
    {
        increaseUniqueIdCounter
        uniqueId = uniqueIdCounter
    }

    def increaseUniqueIdCounter()
    {
        uniqueIdCounter++
    }
}

However, SARL doesn't seem to provide the static key word in an event.

[gallandarakhneorg]

Currently, the static keyword is not allowed for attributes (for backward compatibility with the old SARL syntax) .
We should discuss about its support in agents, behaviors, and skills.

Regarding events, we must be careful. Indeed, they have a special position in the language: they are data objects exchanged by agents. Consequently, we must ensure that it is possible to serialize/deserialize (or any other mechanism) static attributes. It is more related to the capabilities of the Java language in this case.

[gallandarakhneorg]

Static field will not be enable in events. The factory design pattern should be used.
We will provide in the documentation a tutorial for creating events with a factory according to the case explained in this issue.