Why does loading my MATLAB Class object with DBSTOP IF ERROR find errors, but normally no errors are found in MATLAB 7.7 (R2008b)

Question

MathWorks Support Team 2009-6-27

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/92748-why-does-loading-my-matlab-class-object-with-dbstop-if-error-find-errors-but-normally-no-errors-are

I have the following class definition:

classdef test
      properties (SetAccess = 'private')
          p = '';
      end
      methods
          function testobj = set.p(testobj, q)
              if ~(strcmp(q,'a'))
                  error('error')
              end
              disp('Listened to p');
              testobj.p = q;
          end
      end
end

If you instatiate a copy of the above class by typing,

a = test;
save a
load a

Nothing happens and the code loads. However, if I first type

dbstop if error

and then execute the same lines as before, the debugger finds the error.

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Answer 1

MathWorks Support Team 2009-6-27

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/92748-why-does-loading-my-matlab-class-object-with-dbstop-if-error-find-errors-but-normally-no-errors-are#answer_102098

Generally, the LOAD command tries to load as much as possible and so it never throws real errors unless it detects a corrupt file and is unable to continue. Using "dbstop if all error" is a good way to debug problems during load.