I think this 40 second snippet of a talk by Rob Pike <https://www.youtube.com/watch?v=PAAkCSZUG1c&feature=youtu.be&t=15m21s> is apropos. It is not specific to your case, but speaks of reflection in general.
On Thursday, January 18, 2018 at 5:20:26 PM UTC-5, Boone Severson wrote: > > Ok, asked and answered. Figuring out .Addr() was a key, as was finding the > magic incantation to get a handle to a method. I'm curious if there's a > better method. > > https://play.golang.org/p/49Yj9G0egRI > > package main > > import ( > "fmt" > "reflect" > ) > > type FooTypeA uint8 > type FooTypeB uint8 > > type MyStruct struct { > Foo FooTypeA > Bar FooTypeB > } > > func (mt *FooTypeA) Validate() bool { > return *mt > 1 > } > func (mt *FooTypeB) Validate() bool { > return *mt > 0 > } > > func (ms *MyStruct) Validate() bool { > s := reflect.ValueOf(ms).Elem() > > // Call Validate on all fields > for i := 0; i < s.NumField(); i++ { > > f := s.Field(i).Addr() > method, _ := f.Type().MethodByName("Validate") > outs := method.Func.Call([]reflect.Value{f}) > if !outs[0].Bool() { > return false > } > } > return true > } > > func main() { > > mytype := &MyStruct{ > Foo: FooTypeA(2), > Bar: FooTypeB(5), > } > > fmt.Println("what is mytype? ", mytype) > > if !mytype.Validate() { > fmt.Println("Validation failed") > } > } > -- 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. For more options, visit https://groups.google.com/d/optout.
