I don't like to advertise, but a user of a library I'm working on had this exact issue. While I agree that the standard library could probably vend it's own way to give this information to users, I have an interim solution here: Accessing name of enum with a raw value · Issue #9 · Azoy/Echo · GitHub. (I believe everything in this solution is ABI stable on Darwin platforms.) This just looks at the enum metadata to get it's name.