Hi, the relevant spec section is https://golang.org/ref/spec#Selectors
A selector f may denote a field or method f of a type T, or it may refer to > a field or method f of a nested embedded field of T. The number of embedded > fields traversed to reach f is called its depth in T. The depth of a field > or method f declared in T is zero. The depth of a field or method f > declared in an embedded field A in T is the depth of f in A plus one. and For a value x of type T or *T where T is not a pointer or interface type, > x.f denotes the field or method at the shallowest depth in T where there is > such an f. If there is not exactly one f with shallowest depth, the > selector expression is illegal. In your example, zz.Fun refers to zz.Y.Fun, as that has a depth of 1, whereas zz.Q.Fun has a depth of 2 (Q has depth 1 and Fun has depth 1 within Q) and zz.X.Fun (X has depth 2 in Z and Fun has depth 0 in X). Note, in particular, that the check happens at the selector expression, not at the type-definition. This is intentional, as it means you can embed multiple types without it being an error if they have the same fields/methods. I agree that all of this makes not necessarily for the most readable code, but the rule that the shallowest depth must be unique is what makes the selector well-defined. On Tue, Nov 17, 2020 at 9:57 PM Michal Ostrowski <mic...@clumio.com> wrote: > > Here is a playground doc that demonstrates what seems to be strange > behavior regarding promotion of methods. > > https://play.golang.org/p/R9M1lAOd9CA > > It seems that I can generate a struct a have an ambiguous method by adding > a level of indirection in struct definitions. Or there's something in the > language spec that I'm missing (and I'd appreciate a reference to that in > that case.) > > > > -- > 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/cb606644-1b76-4db1-af8c-96b5efac1c20n%40googlegroups.com > <https://groups.google.com/d/msgid/golang-nuts/cb606644-1b76-4db1-af8c-96b5efac1c20n%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/CAEkBMfEkpAKtQo0zUrZ5hwEUa9wEYy%2BX4M_j17mniuap6R-uWw%40mail.gmail.com.
