On Wed, Oct 13, 2021 at 11:36 AM roger peppe <rogpe...@gmail.com> wrote:
> ISTM that in a sense, generics *are* behind a flag in 1.18, on a > per-module basis at any rate - if your go.mod file doesn't declare a Go > version of at least 1.18, then you can't use type parameters. > The (important) difference being that with a flag, we'd generally reserve the right to change the behavior in the future, should experimentation show it to be deficient, while this way, we can't - once we release generics, we are bound to that. And setting there is no way to opt in to other aspects of go 1.18 *without* also getting generics. I guess in theory we could have a `language_experiments = (generics)` (or something) directive in go.mod, to *actually* get per-module opt-in to "beta-features". AIUI that's kind of what Haskell does. This might still split the ecosystem, though. > > > >> >> >> > On Monday, October 11, 2021 at 5:26:35 PM UTC+13 Ian Lance Taylor wrote: >> >> >> >> On Sun, Oct 10, 2021 at 2:55 AM nil...@gmail.com <nil...@gmail.com> >> wrote: >> >> > >> >> > We are really excited about the coming generics support in Go, our >> test drive of the generics support in 1.17 is so far pretty positive and it >> would also allow us to immediately delete tens of thousands lines of code >> from our main project. >> >> > >> >> > Our understanding is that Go team's current plan is to have the >> generics support enabled by default in the 1.18 release scheduled for Feb >> 2022. The question we are facing now is how much certainty we have on that. >> I mean if generics could get delayed until 1.19, which would be 10 months >> from now, then we should probably wait rather than switching to the full >> use of generics now. >> >> > >> >> > Could someone from the Go team provide us some guidance please? >> Shall we wait until the coming code freeze or maybe beta1 to expect more >> clarification? >> >> >> >> The current expectation is that Go 1.18 will support generics. The >> >> tip Go compiler already supports generics. There are bugs, but as >> >> they are reported they are being fixed. It is reasonably likely that >> >> some generics corner cases will not compile in Go 1.18, but the >> >> expectation is that straightforward uses of generics will work as >> >> expected. It is also likely that performance in Go 1.18 will not be >> >> as good as it will be in later releases. >> >> >> >> Of course, it's impossible to guarantee this. Something completely >> >> unexpected could happen. But that is the expectation. Hope this >> >> helps. >> >> >> >> Ian >> > >> > -- >> > 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/a2b05910-9cdc-4fb4-94d5-61bd12812089n%40googlegroups.com >> . >> >> -- >> 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/CAOyqgcUK64FN9%3DYuo0xFTfAz%2Ban8eq9vwgX9rkcFsAdU0P%3DkfQ%40mail.gmail.com >> . >> > -- > 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/CAJhgacjO%2BjhB0WyV1H1vJxXxymP7gkvdNoqvZuHngkEVd3DURw%40mail.gmail.com > <https://groups.google.com/d/msgid/golang-nuts/CAJhgacjO%2BjhB0WyV1H1vJxXxymP7gkvdNoqvZuHngkEVd3DURw%40mail.gmail.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/CAEkBMfFu%2B3c-WNnyoon37ms3SPC25joQGejwGOz-VpmgVqPvJA%40mail.gmail.com.
