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POC# Ensure Valid Enum Values - Futureproof Method
 

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    <p>I'm writing some code with a simple switch statement based on Enum values. It occurred to me that at some point in future a developer may add a new value, so I included a default method to capture this at runtime and throw an exception. However I realised that I should do this every time I put in logic like this, and that I'd only see such issues at run time rather than compile time.<br> I'm wonderring if there's some code I can add to get the compiler to tell the developer that they need to update certain methods in the case that they update enum values - beyond just adding comments to the enum itself?</p> <p>e.g. (the example below's purely theoretical; I chose statuses from the development lifecycle to ensure it's something familiar to most).</p> <pre><code>public enum DevelopmentStatusEnum { Development //, QA //this may be added at some point in the future (or any other status could be) , SIT , UAT , Production } public class Example { public void ExampleMethod(DevelopmentStatusEnum status) { switch (status) { case DevelopmentStatusEnum.Development: DoSomething(); break; case DevelopmentStatusEnum.SIT: DoSomething(); break; case DevelopmentStatusEnum.UAT: DoSomething(); break; case DevelopmentStatusEnum.Production: DoSomething(); break; default: throw new StupidProgrammerException(); //I'd like the compiler to ensure that this line never runs, even if a programmer edits the values available to the enum, alerting the program to add a new case statement for the new enum value } } public void DoSomething() { } } public class StupidProgrammerException: InvalidOperationException { } </code></pre> <p>This is a bit academic, but I can see it as being useful in making my app robust. Has anyone tried this before / got any good ideas on how this might be achieved?</p> <p>Thanks in advance,</p> <p>JB</p>
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    1. COI do it the same way that you do.
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