Let's imagine a syntax-sugared Go... Every function has a hidden "err" return value Every function has an "exceptionExit:" block, by default it does just "ret

Let's imagine a syntax-sugared Go... Every function has a hidden "err" return value Every function has an "exceptionExit:" block, by default it does just "return err;" After every function call, an automatic "if err != nil {goto exceptionExit}" is added. You can add an "exception" block to a function, it replaces the default. Now you have function level exceptions in Go just by syntax sugar, without stack unwinding and without requiring new compiler functionality, just syntax sugar.