public static MethodHandler CreateMethodHandler(MethodBase method)
{
var dynam = new DynamicMethod(string.Empty, typeof(object), ManyObjects, Module, true);
ILGenerator il = dynam.GetILGenerator();
ParameterInfo[] args = method.GetParameters();
Label argsOK = il.DefineLabel();
il.Emit(OpCodes.Ldarg_1);
il.Emit(OpCodes.Ldlen);
il.Emit(OpCodes.Ldc_I4, args.Length);
il.Emit(OpCodes.Beq, argsOK);
il.Emit(OpCodes.Newobj, typeof(TargetParameterCountException).GetConstructor(Type.EmptyTypes));
il.Emit(OpCodes.Throw);
il.MarkLabel(argsOK);
il.PushInstance(method.DeclaringType);
for (int i = 0; i < args.Length; i++)
{
il.Emit(OpCodes.Ldarg_1);
il.Emit(OpCodes.Ldc_I4, i);
il.Emit(OpCodes.Ldelem_Ref);
il.UnboxIfNeeded(args[i].ParameterType);
}
if (method.IsConstructor)
{
il.Emit(OpCodes.Newobj, method as ConstructorInfo);
}
else if (method.IsFinal || !method.IsVirtual)
{
il.Emit(OpCodes.Call, method as MethodInfo);
}
else
{
il.Emit(OpCodes.Callvirt, method as MethodInfo);
}
Type returnType = method.IsConstructor ? method.DeclaringType : (method as MethodInfo).ReturnType;
if (returnType != typeof(void))
{
il.BoxIfNeeded(returnType);
}
else
{
il.Emit(OpCodes.Ldnull);
}
il.Emit(OpCodes.Ret);
return((MethodHandler)dynam.CreateDelegate(typeof(MethodHandler)));
}
public static Action <object, object> CreateFieldSetterHandler(FieldInfo fieldInfo)
{
var dynam = new DynamicMethod(string.Empty, typeof(void), TwoObjects, Module, true);
ILGenerator il = dynam.GetILGenerator();
if (!fieldInfo.IsStatic)
{
il.PushInstance(fieldInfo.DeclaringType);
}
il.Emit(OpCodes.Ldarg_1);
il.UnboxIfNeeded(fieldInfo.FieldType);
il.Emit(OpCodes.Stfld, fieldInfo);
il.Emit(OpCodes.Ret);
return((Action <object, object>)dynam.CreateDelegate(typeof(Action <object, object>)));
}
