Oh, I only just realized that "pointer indirection" is literally in that list of addressable things. For some reason I have overlooked that, even after re-reading the section of the spec several times. That really makes this clear.
On Wed, 17 Jul 2024 at 06:51, Ian Lance Taylor <i...@golang.org> wrote: > On Tue, Jul 16, 2024 at 9:29 PM 王旭东 <wxd...@gmail.com> wrote: > > > > Hi, I have a question about "addressable." > > > > The following code illustrates my question (see the comments): > > https://go.dev/play/p/xpiPXuEqh0O?v=gotip > > > > > > > > I also posted question in the Gopher Slack channel, and @Axel Wagner > provided a detailed explanation, suggesting that this might be a gap in the > Go specification. > > @Jason Phillips recommended that I ask this question in the GitHub > issues and the golang-nuts mailing list. > > > > I really appreciate everyone’s help mentioned, but I still don’t have a > clear conclusion. > > > > To simplify: my question is why the result of myfunReturnPointer() is > addressable if we strictly follow the specification. > > > In https://go.dev/ref/spec#Selectors the spec explains that if the > type of x is a pointer, then the selector expression x.f is shorthand > for (*x).f. That is the case in your playground example: the > expression myfunReturnPointer().i is short for > (*myfunReturnPointer()).i. The pointer indirection > *myfunReturnPointer() is addressable according to > https://go.dev/ref/spec#Address_operators. So this is a field > selector of an addressable struct operand. > > 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/CAOyqgcUL0D9a0nmXP%2BNJTPrax-ixWFUvRwuUAK5m1G-LtjzH7w%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/CAEkBMfFB8YNo2V%2BkDXwbDGMCzPyp8tEXHmTt0OBE%3DiSY1%2Bjf6g%40mail.gmail.com.
