[Feature] Generic (interface) constraints

[alexnask]

I vaguely remember this exact issue being discussed in some ooc-lang/rock issue but I am basically talking about this kind of stuff:

Comparable: interface {
    greater?: func(other: This) -> Bool
    lesser?: func(other: This) -> Bool
}

f: func <T: Comparable> (a, b: T, g: Func) {
    if (a greater?(b)) {
        g()
    }
}

Basically, the above would be equivalent to:

f: func (a, b: Comparable, g: Func) {
    if (a greater?(b)) {
        g()
    }
}

But make sure that a, b are of the same type (or have a common root type).

[marcusnaslund]

Do you mean this one? ooc-lang#822

[alexnask]

@marcusnaslund

Oops, I thought it was just a tangent discussion on a closed issue.
This is indeed the issue I was referring to.

[alexnask]

My knowledge on the way interfaces are implemented in the runtime is probably the shakiest out of all ooc features.

I will be looking into it in more depth and fixing as many bugs as possible and possibly implementing this (although this would probably be a part of the much needed typearg system rewrite).