Using Randomness in Stdlib methods

[oscbyspro]

Another thing I noticed while testing (#67) is that I can't use Randomness (#45) in calls like Array/randomElement(using:). I could perhaps add some kind of adapter type to fix it:

extension Randomness {
    var stdlib: /* Adapter<Self> */ {
        get { ... }
        set { ... }
    }
}

var fuzzer = FuzzerInt(seed: 123)
var elements = [1, 2, 3]
ler random = elements.randomElement(using: &fuzzer.stdlib)!

[oscbyspro]

Alternatively, perhaps I can do better with an associated type or a protocol. An associated type would be nice insofar as it lets RandomInt vend SystemRandomNumberGenerator. Fewer generic specializations, etc.

[oscbyspro]

Hm. I'm just thinking out loud at this point. But, maybe something like this could work:

public protocol Interoperable {
    
    associatedtype Stdlib
    
    init(_ stdlib: consuming Stdlib)
        
    consuming func stdlib() -> Stdlib
    
}

extension Interoperable {

    @inlinable public var stdlib: Stdlib {
        mutating _read {
            let stdlib = self.stdlib()
            yield stdlib
            self = Self(stdlib)
        }
        
        mutating _modify {
            var stdlib = self.stdlib()
            yield &stdlib
            self = Self(stdlib)
        }
    }
}