RxSwift源码与模式分析一：基本类

封装、变换与处理

// Represents a push style sequence.

public protocol ObservableType : ObservableConvertibleType {

func subscribe<O: ObserverType>(_ observer: O) -> Disposable where O.E == E

}

/// It represents a push style sequence.

public class Observable<Element> : ObservableType {

public typealias E = Element

public func subscribe<O: ObserverType>(_ observer: O) -> Disposable where O.E == E {

rxAbstractMethod()

}

public func asObservable() -> Observable<E> {

return self

}

/// Optimizations for map operator

internal func composeMap<R>(_ transform: @escaping (Element) throws -> R) -> Observable<R> {

return _map(source: self, transform: transform)

}

}

public protocol ObserverType {

associatedtype E

func on(_ event: Event<E>)

}

public enum Event<Element> {

case next(Element)

case error(Swift.Error)

case completed

}

public struct Reactive<Base> {

public let base: Base

public init(_ base: Base) {

self.base = base

}

}

public struct Binder<Value>: ObserverType