How to handle failed Matlab constructor? -

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the matlab docs give example of class closes file if object deleted. i'm trying similar serial port object, if constructor fails valid handle object, delete method throw error.

so question how make this:

classdef filewriter < handle    properties (access = private)       fileid    end     methods       function obj = filewriter(filename)          obj.fileid = fopen(filename,'a'); % if fails...       end        function writetofile(obj,text_str)          fprintf(obj.fileid,'%s\n',text_str);       end        function delete(obj)          fclose(obj.fileid); % fail       end    end end

...where constructor may fail?

in constructor should check failure. in case comparing fileid -1 , calling error. in delete method check fileid against -1 well, , not perform fclose, if -1, perform cleanly.


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