Making Wrong Code Look Wrong

Here’s a very good article which discusses a coding design principle “Making wrong code look wrong”.

Understanding the contents of this article will make any C++ or Delphi programmer write better code.

Making Wrong Code Look Wrong – Joel Spolsky on Software.pdf

Author Joel Spolsky is a great thinker on how to write good code.

As a C++ programmer I do feel I have to take issue with his arguments against C++ exceptions. You can regard the C++ Exception as a “goto” with an unknown destination. This does sound like a recipe for a “bad smell” in your code. But C++ Exceptions are designed for handling errors that occur in a self contained part of code that can’t know what the correct way (because it depends on the time of usage) to behave when the error is encountered. By passing back an exception it allows the calling code to decide how to handle the error condition. This is an invaluable tool when used correctly. C++ Exceptions are great for solving this design challenge. But please don’t use them for anything else. Any other use immediately drifts into the problem area discussed by Joel Spolsky in his document.