Issue Description:

It's still a bit unclear if this is a bug or a feature, but anyhow Swift allows to use same names in Enums for cases and static variables, but only if the type is explicitely defined to the variable before it's value is initialized.

So the question is that should enum allow same names for cases and static variables, and if so should this fllowing compiler error to be resolved?

Here's the example:

enum Foo {
    case bar(Int?)
    case doo
    static var bar: Foo { .bar(nil) }
    static var baar: Foo { .bar(nil) }
}

let bar = Foo.bar // Swift Compiler Error: Ambigious use of 'bar'
let baar = Foo.baar // No problems
let doo = Foo.doo // No problems

let bar2: Foo = Foo.bar // No problems