In the process of going through my game engine and refactoring a few things, I noticed a bunch of
TODO: reminders that I had apparently dropped in months ago and promptly forgot about. Out of sight, out of mind.
After a quick search, I found this very helpful post by Jake Marsh for turning them (and other markers) into Xcode warnings at build time.
I refactored his snippet slightly and ended up with the following. Just drop it in as a script build phase.
The advantage of all this is that I absolutely abhor warnings. Having them show up every time I build will quickly grate on my nerves until I go in and address them.