swift block scope idea for test (protocol not allowed)

scoping.swift

import Foundation

public func FuntionScope(_ closure: () -> () ) {
    closure()
}

public let TupleScope = { (c: () -> ()) in c() }
public let TupleExpScope: (() -> ()) -> () = { $0() }

// adding closure typealias
public typealias Closure<T> = (T) -> Void
public let TupleExpScopeWithTypealias: Closure<Closure<Void>> = { $0(()) }

public let scope = TupleExpScopeWithVoidTypealias

// usage
scope {
    print("hi there?")
    print("hello? i'm in here")
    print("good")
}

// error
scope {
    protocol AProtocol { ... }  // Protocol 'AProtocol' cannot be nested inside another declaration
}