alt Hacker NewsColored functions are good. It reflects the language design on signaling what is important, and what are the properties it want the writer to pay attention. Other examples of colored functions:
* Haskell: pure function and non-pure (IO monads) looks different. * Rust: unsafe functions (or block) requires special markers.
My mind went to Java's checked exceptions -- not sure if anyone today believes that coloring is still a good idea.