js-proposal-algebraic-effects

Ok I was wrongly assuming that panic was expecting an error type, in fact it's an interface{}. > Your use of exceptions for flow control (i.e. goto) is considered harmful Exceptions are a way to delegate error handling to the caller by giving them informations about the unexpected behavior. It implies that the expected behavior is the "happy path" (everything went well) and any deviations (errors) is unexpected. This is far from a goto because you can have `try/finally` blocks without catch (or defer in golang). Also, exceptions are just a kind of algebraic effects that do not resume. There was a proposal to JS for this: https://github.com/macabeus/js-proposal-algebraic-effects This is also easier to test. assertRaises(ErrorType, func() { code... }) Almost every Go library I've seen just return an error (which is just a string), you'd nee