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POTheory on error handling?
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  1. POTheory on error handling?
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    copied!<p>Most advice concerning error handling boils down to a handful of tips and tricks (see <a href="https://stackoverflow.com/questions/231128/c-error-handling-good-sources-of-example-code">this post</a> for example). These hints are helpful but I think they don't answer all questions. I feel that I should design my application according to a certain philosophy, a school of thought that provides a strong foundation to build upon. Is there such a theory on the topic of error handling?</p> <p>Here's a few practical questions:</p> <ul> <li>How to decide if an error should be handled locally or propagated to higher level code?</li> <li>How to decide between logging an error, or showing it as an error message to the user?</li> <li>Is logging something that should only be done in application code? Or is it ok to do some logging from library code.</li> <li>In case of exceptions, where should you <em>generally</em> catch them? In low-level or higher level code?</li> <li>Should you strive for a unified error handling strategy through all layers of code, or try to develop a system that can adapt itself to a variety of error handling strategies (in order to be able to deal with errors from 3rd party libraries).</li> <li>Does it make sense to create a list of error codes? Or is that old fashioned these days?</li> </ul> <p>In many cases common sense is sufficient for developing a good-enough strategy to deal with error conditions. However, I would like to know if there is a more formal/"scholarly" approach?</p> <p>PS: this is a general question, but C++ specific answers are welcome too (C++ is my main programming language for work).</p>
 

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