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c#reflectiondynamicmethod
Dragonblf
Dragonblf

Reputation: 115

C# - Reflection.Emit: Return reference to a local variable

I want to make a DynamicMethod which in turn behave like the following for example:

AnyClass myClass = new AnyClass();
Func<AnyClass> myFunc = () => myClass;

I know that when I want to make it work with an int instead of AnyClass I have to use the following snippet to return every time the number 12:

// Define method
DynamicMethod method = new DynamicMethod(
    "Name",
    typeof(int),
    new Type[] { });

// Define method body
ILGenerator il = method.GetILGenerator();
il.Emit(OpCodes.Ldc_I4, 12);
il.Emit(OpCodes.Ret);

But now I ask myself how to do it with a not build-in class.

Edit:

At the end I want to get a reference from a local variable when I call the DynamicMethod. Look at the following snippet to better understand what I wanted to archieve. Here I want a func which returns on every call the variable I passed to the function which creates the func.

Func<AnyClass> GetMethodWithAFunc(AnyClass myClass) {
   Func<AnyClass> myFunc = () => myClass;
   return myFunc;
}

The generated IL Code for the snippet can be found on SharpLab. Unfortunately we have to provide a context where the data to return in the DynamicMethod could be saved. Finally I suggest a static cache and to use converting and unboxing when returning the values.

Upvotes: 0

Views: 323

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