private MethodBuilder CreateMethodProxy(MethodBuilder context, DynamicMethod target)
{
TypeBuilder tb = (TypeBuilder)context.DeclaringType;
string name = $".dmdproxy<{target.Name.Replace('.', '_')}>?{target.GetHashCode()}";
MethodBuilder mb;
// System.NotSupportedException: The invoked member is not supported before the type is created.
/*
* mb = tb.GetMethod(name, BindingFlags.NonPublic | BindingFlags.Static) as MethodBuilder;
* if (mb != null)
* return mb;
*/
Type[] args = target.GetParameters().Select(param => param.ParameterType).ToArray();
mb = tb.DefineMethod(
name,
System.Reflection.MethodAttributes.HideBySig | System.Reflection.MethodAttributes.Private | System.Reflection.MethodAttributes.Static,
CallingConventions.Standard,
target.ReturnType,
args
);
ILGenerator il = mb.GetILGenerator();
// Load the DynamicMethod reference first.
il.EmitReference(target);
// Load any other arguments on top of that.
il.Emit(OpCodes.Ldnull);
il.Emit(OpCodes.Ldc_I4, args.Length);
il.Emit(OpCodes.Newarr, typeof(object));
for (int i = 0; i < args.Length; i++)
{
il.Emit(OpCodes.Dup);
il.Emit(OpCodes.Ldc_I4, i);
il.Emit(OpCodes.Ldarg, i);
il.Emit(OpCodes.Stelem_Ref);
}
// Invoke the delegate and return its result.
il.Emit(OpCodes.Callvirt, m_MethodBase_InvokeSimple);
if (target.ReturnType == typeof(void))
{
il.Emit(OpCodes.Pop);
}
else if (target.ReturnType.IsValueType)
{
il.Emit(OpCodes.Unbox_Any, target.ReturnType);
}
il.Emit(OpCodes.Ret);
return(mb);
}
