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Merge pull request #75 from mackysoft/feature/support-contravariance
Support contravariance/covariance
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,93 @@ | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using UnityEngine; | ||
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| public interface IActor { } | ||
| public interface IStandardActor : IActor { } | ||
| public interface INetworkActor : IActor { } | ||
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| public interface IContravarianceAction<in T> where T : IActor { | ||
| void DoAction (T actor); | ||
| } | ||
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| public interface ICovarianceAction<out T> where T : IActor | ||
| { | ||
| T Actor { get; } | ||
| } | ||
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| public interface IActorAction : IContravarianceAction<IActor>, ICovarianceAction<IActor> { } | ||
| public interface IStandardActorAction : IContravarianceAction<IStandardActor>, ICovarianceAction<IStandardActor> { } | ||
| public interface INetworkActorAction : IContravarianceAction<INetworkActor>, ICovarianceAction<INetworkActor> { } | ||
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| [Serializable] | ||
| public sealed class StandardActorAction : IContravarianceAction<IStandardActor>, ICovarianceAction<IStandardActor> | ||
| { | ||
| public void DoAction (IStandardActor actor) | ||
| { | ||
| } | ||
| public IStandardActor Actor => null; | ||
| } | ||
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| [Serializable] | ||
| public sealed class ActorAction : IContravarianceAction<IActor>, ICovarianceAction<IActor> | ||
| { | ||
| public void DoAction (IActor actor) | ||
| { | ||
| } | ||
| public IActor Actor => null; | ||
| } | ||
|
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| [Serializable] | ||
| public abstract class BaseAction<T> : IContravarianceAction<T>, ICovarianceAction<T> where T : IActor | ||
| { | ||
| public void DoAction (T actor) { | ||
| } | ||
| public T Actor => default; | ||
| } | ||
|
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| [Serializable] | ||
| public sealed class DerivedAction1 : BaseAction<IActor> { } | ||
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| [Serializable] | ||
| public sealed class DerivedAction2 : BaseAction<INetworkActor> { } | ||
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| [Serializable] | ||
| public sealed class DerivedAction3 : BaseAction<IStandardActor> { } | ||
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| [Serializable] | ||
| public sealed class NetworkActorAction1 : INetworkActorAction | ||
| { | ||
| public void DoAction (INetworkActor actor) | ||
| { | ||
| } | ||
| public INetworkActor Actor => null; | ||
| } | ||
|
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| [Serializable] | ||
| public sealed class NetworkActorAction2 : IContravarianceAction<INetworkActor>, ICovarianceAction<INetworkActor> | ||
| { | ||
| public void DoAction (INetworkActor actor) | ||
| { | ||
| } | ||
| public INetworkActor Actor => null; | ||
| } | ||
|
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| [Serializable] | ||
| public sealed class NetworkActorAction3 : IContravarianceAction<IActor>, ICovarianceAction<IActor> | ||
| { | ||
| public void DoAction (IActor actor) | ||
| { | ||
| } | ||
| public IActor Actor => null; | ||
| } | ||
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| public class Example_Generics : MonoBehaviour | ||
| { | ||
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| [SerializeReference, SubclassSelector] | ||
| public List<IContravarianceAction<INetworkActor>> contravarianceActions = new List<IContravarianceAction<INetworkActor>>(); | ||
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| [SerializeReference, SubclassSelector] | ||
| public List<ICovarianceAction<INetworkActor>> covarianceActions = new List<ICovarianceAction<INetworkActor>>(); | ||
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| } |
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