It would actually be ambiguous in the very place they're required. Consider this not completely unreasonable example: https://go.dev/play/p/OL0uOnPZXju
Also, with generics it could be ambiguous in type parameters. To summarize, parentheses are needed around the return types because otherwise anywhere a list of types is used, it would be ambiguous. Regards, Per Johansson On Tuesday, January 31, 2023 at 8:38:46 PM UTC+1 axel.wa...@googlemail.com wrote: > I'm not sure there really is a "reason", per se. The language could just > as well have been designed not to require parentheses around the return > types (at least I see no parsing ambiguity with that, though there might > be) or designed to require parentheses in the return statement. It probably > just felt more intuitive and readable to the designers at the time. > > FWIW I find it more interesting that `func() T` requires no parentheses, > but `func() (S, T)` does. > > On Tue, Jan 31, 2023 at 5:55 PM Raphael Clancy <raphael...@gmail.com> > wrote: > >> Hey all, I figured it was time to move to a "modern" language and I >> thought I'd give go a try. So far, I'm really enjoying it. I'm just getting >> started and I had a question about parentheses. Though, I guess it's really >> about how go parses lines of code and what counts as a delimiter. >> >> Anyway, in the get started section on error handling >> <https://go.dev/doc/tutorial/handle-errors>, why are parentheses >> required around string and error here: >> >> func Hello(name string) (string, error) {... >> >> but not around message and nil here: >> >> return message, nil >> >> I tried searching a bit but I couldn't come up with anything about such a >> basic topic. >> >> Thanks! >> >> -- >> You received this message because you are subscribed to the Google Groups >> "golang-nuts" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to golang-nuts...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/golang-nuts/b49dc8c2-26ea-46bc-b76a-708a2537207cn%40googlegroups.com >> >> <https://groups.google.com/d/msgid/golang-nuts/b49dc8c2-26ea-46bc-b76a-708a2537207cn%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/56d23af2-b3dd-4c59-86d4-d14d56e73a93n%40googlegroups.com.
