feat: struct embedding, enums

go-by-example/structs/struct-embedding/struct-embedding.go

@@ -0,0 +1,40 @@
+package main
+
+import (
+	"fmt"
+)
+
+type base struct {
+	num int
+}
+
+func (b base) describe() string {
+	return fmt.Sprintf("base with num=%v", b.num)
+}
+
+type container struct {
+	base
+	str string
+}
+
+func main() {
+	co := container{
+		base: base{
+			num: 1,
+		},
+		str: "Some name",
+	}
+	fmt.Printf("co={num: %v, str: %v}\n", co.num, co.str)
+
+	fmt.Println("also num: ", co.base.num) // also num but can be without
+
+	// co can also use base method describe since it emebeds base
+	fmt.Println("describe: ", co.describe())
+
+	var d describer = co
+	fmt.Println("describer:", d.describe())
+}
+
+type describer interface {
+	describe() string
+}