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### SerializableCallback
Lets you drag-and-drop methods with or without return values / parameters in the Unity inspector.
It uses expression trees and reflection to cache a delegate on first execution.
Usage is identical to UnityEvent
```csharp
public class MyClass : MonoBehaviour {
//These fields are shown in the inspector
public SerializableCallback callback; // supports all non-void return types
public Condition condition; // supports bool return types only
public GetProduct getProduct; // supports MyProduct return types only
void Start() {
// Callbacks can be invoked with or without parameters, and with different types
Debug.Log(callback.Invoke()); // returns object
Debug.Log(condition.Invoke()); // returns bool
Debug.Log(getProduct.Invoke(2)); // returns MyProduct
}
// As with UnityEvents, custom callbacks must have a non-generic wrapper class marked as [Serializable] in order to be serialized by Unity
[Serializable]
public class Condition : SerializableCallback<bool> {}
// Last generic type parameter is the return type, staying consistent with System.Func
[Serializable]
public class GetProduct : SerializableCallback<int, MyProduct> {}
}
```
| Performance (100000 iterations) | Time |
| -------------------------------------------- | --------- |
| bool Method(float) | 00.00304s |
| SerializedCallback<float, bool> (Persistent) | 00.01026s |
| SerializedCallback<float, bool> (Dynamic) | 00.00797s |
### Installing with Unity Package Manager
To install this project as a dependency using the Unity Package Manager,
add the following line to your project's `manifest.json`:
```
"com.github.siccity.serializablecallback": "git+https://github.com/Siccity/SerializableCallback.git"
```
Join the [Discord](https://discord.gg/qgPrHv4 "Join Discord server") server to leave feedback or get support.
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