I have imagine (for my toy language) that is weird to force one way or another (always handle or always check), but instead use the unix idea of STDOUT/STDERR.

I have imagine (for my toy language) that is weird to force one way or another (always handle or always check), but instead use the unix idea of STDOUT/STDERR. A function return values in STDOUT, and exceptions always go to STDERR: This is GO style: file | maybeError? := open('thisnotexist.ever') And is totally ok to say, python style: file := open('thisnotexist.ever') and upper in the chain is possible to catch it: match MyAwesomeFunction(): StdIn: StdErr: Or maybe try/catch. The idea is that if stderr is consumed is handled right there, but if not it "throw" and work like a exception.