why the error 'code generation does not support classes and enumerations in @-directories' is coming during matlab to c conversion?

I want to convert the below code into c where the output of function called using coder.ceval is of type struct node * .So here I used the concept of classes. I added a dlnode.m file which contains classes definition in @dlnode directory but it is giving the error 'code generation does not support classes and enumerations in @-directories'.

function[x]=algpeak(ecg) %#codegen

len=length(ecg); fs=17; val=floor(0.2*fs);

head=dlnode(1);

head=coder.ceval('findpeaks',ecg,len,NULL,val);

coder.ceval('printf','%lf',head.pks); x=head.pks+10;

Can anyone suggest some solutuion or any alternative to save struct node * type data in Matlab?

[Ryan Livingston]

Could you please format your code to make the question a bit easier to read?

Answer 1

[Ryan Livingston]

The documentation lists this limitation in the first entry of the table at the preceding link.

Instead of using an @ directory, you can move the class definition into a single file as the workaround on that page suggests.