CoroBehaviour

This is the coroutine class using C++ 11 and boost coroutine2.
Usage of CoroBehaviour is very similar with MonoBehaviour Unity.
You may try to introduce this to the project of Unreal Engine.

Requirements

• C++ 11
• Boost Coroutine2

CoroBehaviour vs. MonoBehaviour

MonoBehaviour in Unity:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class ExampleClass : MonoBehaviour
{
    void Start()
    {
        StartCoroutine(coroutineA());
    }

    IEnumerator coroutineA()
    {
        // wait for 1 second
        Debug.Log("coroutineA created");
        yield return new WaitForSeconds(1.0f);
        yield return StartCoroutine(coroutineB());
        Debug.Log("coroutineA running again");
    }

    IEnumerator coroutineB()
    {
        Debug.Log("coroutineB created");
        yield return new WaitForSeconds(2.5f);
        Debug.Log("coroutineB enables coroutineA to run");
    }
}

CoroBehaviour in C++:

#include "CoroBehaviour.h"
#include <iostream>

class ExampleClass : public CoroBehaviour
{
    void Start()
    {
        StartCoroutine(coroutineA());
    }

    Enumerator coroutineA()
    {
        return [=](CoroPush& yield_return)
        {
            // wait for 1 second
            std::cout << "coroutineA created";
            yield_return(new WaitForSeconds(1.0f));
            yield_return(StartCoroutine(coroutineB()));
            std::cout << "coroutineA running again";
        };
    }

    Enumerator coroutineB()
    {
        return [=](CoroPush& yield_return)
        {
            std::cout << "coroutineB created";
            yield_return(new WaitForSeconds(2.5f));
            std::cout << "coroutineB enables coroutineA to run";
        };
    }
}

Integration with Unreal Engine

I'd like to rename CoroBehaviour to ACoroActor as coding convention of Unreal Engine,
and inherit AActor like below:

class ACoroActor : public AActor
{
    ...
    virtual void Tick(float DeltaTime) override
    {
        Super::Tick(DeltaTime);
        ResumeCoroutines();
    }
    ...
};

Then, use ACoroActor instead of AActor.

Disclaimer

I didn't consider about performace, stability and security.
Please use this at your own risk.

And I have no plan to make this move forward.
Please do it yourself if you need more features.

Contact

exawon@gmail.com