RxRelayPropertyWrappers.swift

import RxRelay
import RxSwift

@propertyWrapper
public struct BehaviorRelayWrapping<T> {
    private let subject: BehaviorRelay<T>
    
    // MARK: PropertyWrapper
    
    public let wrappedValue: Observable<T>
    
    public init(value: T) {
        subject = BehaviorRelay(value: value)
        wrappedValue = subject.asObservable()
    }
    
    // MARK: BehaviorRelay
    
    public func accept(_ event: T) {
        subject.accept(event)
    }
}

@propertyWrapper
public struct PublishRelayWrapping<T> {
    private let subject: PublishRelay<T>
    
    // MARK: PropertyWrapper
    
    public let wrappedValue: Observable<T>
    
    public init() {
        subject = PublishRelay<T>()
        wrappedValue = subject.asObservable()
    }
    
    // MARK: PublishRelay
    
    public func accept(_ event: T) {
        subject.accept(event)
    }
}

RxSubjectPropertyWrappers.swift

import Foundation
import RxSwift
import RxRelay

@propertyWrapper
public struct BehaviorSubjectWrapping<T>: ObserverType {
    private let subject: BehaviorSubject<T>
    
    // MARK: PropertyWrapper
    
    public let wrappedValue: Observable<T>
    
    public init(value: T) {
        subject = BehaviorSubject(value: value)
        wrappedValue = subject.asObservable()
    }
    
    // MARK: ObserverType
    
    public func on(_ event: Event<T>) {
        subject.on(event)
    }
}

@propertyWrapper
public struct PublishSubjectWrapping<T>: ObserverType {
    private let subject: PublishSubject<T>
    
    // MARK: PropertyWrapper
    
    public let wrappedValue: Observable<T>
    
    public init() {
        subject = PublishSubject<T>()
        wrappedValue = subject.asObservable()
    }
    
    // MARK: ObserverType
    
    public func on(_ event: Event<T>) {
        subject.on(event)
    }
}