sections.swift

public protocol Section {
    typealias U
    var count: Int { get }
    func itemAtRow(row: Int) -> U
    subscript(index: Int) -> U { get }
}

public struct ArraySection<T>: Section {
    typealias U = T
    
    public let items: [T]
    
    public init(items: [T]) {
        self.items = items
    }
    
    public var count: Int {
        get {
            return items.count
        }
    }
    
    public func itemAtRow(row: Int) -> U {
        return items[row]
    }
    
    public subscript(index: Int) -> U {
        return itemAtRow(index)
    }
}

public struct RLMArraySection<T: RLMObject>: Section {
    typealias U = T
    
    public let items: RLMArray
    
    public init(items: RLMArray, type: T.Type) {
        self.items = items
    }
    
    public var count: Int {
        get {
            return Int(items.count)
        }
    }
    
    public func itemAtRow(row: Int) -> U {
        return items[UInt(row)] as! U
    }
    
    public subscript(index: Int) -> U {
        return itemAtRow(index)
    }
}