* Yuu LongXue <longxue...@gmail.com> [200904 05:31]: > Hi all, > > I’m confused by the "method set" defined in go > specification，any one can help explain? > > The Go Programming Language Specification says that : > ``` > The method set of any other type T consists of all methods > declared with receiver type T. The method set of the > corresponding pointer type *T is the set of all methods declared > with receiver *T or T (that is, it also contains the method set > of T). > ``` > but actually, the type T can use the method with receiver *T , > which is described as bellow.
In addition to Brian's answer, the method set definition is specifically about which types satisfy a particular interface. While the part of the spec that Brian quoted describes a convenience shorthand, it does not mean that a method declared with receiver *T is in the method set of type T. This is a subtle point that can be confusing. The playground link https://play.golang.org/p/N5IvMNvEsxi illustrates this point. Note that you can call car.String() (line 38), but you cannot assign car to a variable of type Stringer (line 43 produces a compiler error). If you insert an '&' in front of car on line 43, it compiles and runs. This point is worth understanding. ...Marvin -- 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/20200904141109.rp6cqmlidpczj37n%40basil.wdw.
