day9接口 类型分支

src/study/day9Interface/TypeBranch.go

@@ -0,0 +1,33 @@
+package main
+
+import (
+	"go/types"
+	"io"
+)
+
+func main() {
+	var inter interface{}
+	inter = io.EOF
+	inter = nil
+	inter = "aaa"
+	//inter = true
+	switch x := inter.(type) {
+	case types.Nil:
+		println("nil")
+	case int:
+		println("int")
+	case string:
+		println("string")
+	case error:
+		println(x.Error())
+	case bool:
+		if x {
+			println("true")
+		} else {
+			println("false")
+		}
+	default:
+		println("default")
+	}
+
+}