Initial data commit

Task/Abstract-type/Go/abstract-type.go

@@ -0,0 +1,42 @@
+package main
+
+import "fmt"
+
+type Beast interface {
+    Kind() string
+    Name() string
+    Cry() string
+}
+
+type Dog struct {
+    kind string
+    name string
+}
+
+func (d Dog) Kind() string { return d.kind }
+
+func (d Dog) Name() string { return d.name }
+
+func (d Dog) Cry() string { return "Woof" }
+
+type Cat struct {
+    kind string
+    name string
+}
+
+func (c Cat) Kind() string { return c.kind }
+
+func (c Cat) Name() string { return c.name }
+
+func (c Cat) Cry() string { return "Meow" }
+
+func bprint(b Beast) {
+    fmt.Printf("%s, who's a %s, cries: %q.\n", b.Name(), b.Kind(), b.Cry())
+}
+
+func main() {
+    d := Dog{"labrador", "Max"}
+    c := Cat{"siamese", "Sammy"}
+    bprint(d)
+    bprint(c)
+}