subscriptionLookup.swift

@dynamicMemberLookup
protocol DictionaryDynamicLookup {
    associatedtype Key
    associatedtype Value
    subscript(key: Key) -> Value? { get }
}

extension DictionaryDynamicLookup where Key == String {
    subscript(dynamicMember member: String) -> Value? {
        return self[member]
    }
}

extension Dictionary: DictionaryDynamicLookup {}

let dict: [String : Any] = [
    "name": "Nikita",
    "age": 24
]

print(dict.name)
print(dict.age)