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--- snippets:golang:struct [2018/03/20 11:33] – allspark
+++ snippets:golang:struct [2018/03/20 11:46] (current) – allspark
@@ Line 1: / Line 1: @@
+## struct
+struct and inheritance example
+```go
+package main
+import (
+        "fmt"
+)
+type Speaker interface {
+        Speak() string
+}
+type Pet struct {
+        name string
+}
+type Dog struct {
+        Pet
+        Breed string
+}
+func (p *Pet) Play() {
+        fmt.Println(p.Speak())
+}
+func (p *Pet) Speak() string {
+        return fmt.Sprintf("my name is %v", p.name)
+}
+func (p *Pet) Name() string {
+        return p.name
+}
+func (d *Dog) Speak() string {
+        return fmt.Sprintf("%v and I am a %v", d.Pet.Speak(), d.Breed)
+}
+func Speak(p Speaker) {
+        fmt.Println(p.Speak())
+        //p.Name()
+        //  p.Name undefined (type Speaker has no field or method Name)
+}
+func main() {
+        d := Dog{Pet: Pet{name: "spot"}, Breed: "pointer"}
+        fmt.Println(d.Name())
+        fmt.Println(d.Speak())
+        d.Play() // p* is a Pet, p.Speak -> (p *Pet) Speak()   no cast to Dog
+        Speak(&d)
+}
+```
+### output
+<hidden>
+```
+spot
+my name is spot and I am a pointer
+my name is spot
+my name is spot and I am a pointer
+```
+</hidden>

allsparks place