Type
我们可以通过Tyepof来获取变量的值，但要区分type和kind，前者表示真实类型（静态类型），后者表示基础结构（底层类型）
type X int
func main(){
var a X=100
t:=reflect.TypeOf(a)
fmt.Println(t.Name(),t.Kind())
}
输出：
X int
方法Elem返回指针、数组、切片、字典（值）或通道的类型
func main(){
fmt.Println(reflect.TypeOf(map[string]int{}).Elem())
fmt.Println(reflect.TypeOf([]int32{}).Elem())
}
输出：
int
int32
Value
《The way to Go》中的一段代码：
通过反射来遍历struct
package main
import (
"fmt"
"reflect"
)
type NotknownType struct {
s1, s2, s3 string
}
var secret interface{} = NotknownType{"Ada", "Go", "Oberon"}
func main() {
value := reflect.ValueOf(secret)
for i := 0; i < value.NumField(); i++ {
fmt.Printf("Field %d: %v\n", i, value.Field(i))
//也可以将value的值输出出来，当必须是类型一致，如
fmt.Println(value.Field(i).String())
}
}
type inter int
var x inter=45
var y float64 = 3.4
fmt.Println("type:", reflect.TypeOf(x)) //reflect.TypeOf includes an empty interface
//When we call reflect.TypeOf(x), x is first stored in an empty interface, which is then passed as the argument;
fmt.Println("value:", reflect.ValueOf(x))
fmt.Println("type:", reflect.TypeOf(y))
//Both reflect.Type and reflect.Value have lots of methods to let us examine and manipulate them
v := reflect.ValueOf(y) //得到Valueof变量
fmt.Println("type:", v.Type())
fmt.Println("kind is float64:", v.Kind() == reflect.Float64)
fmt.Println("value:", v.Float())
var z uint8 = 'x'
h := reflect.ValueOf(z)
fmt.Println("type:", h.Type()) // uint8.
fmt.Println("kind is uint8: ", h.Kind() == reflect.Uint8) // true.
fmt.Println(h.Uint())
