Go Reflection是程序检查其自身结构（尤其是通过类型）的能力。这是元编程的一种形式。
反射可用于在运行时调查类型和变量, 例如它的大小, 方法, 也可以“动态”地称这些方法。
去反映的例子
package main
import(
"fmt"
"reflect"
)
func main() {
age := 27.5
fmt.Printf("%T\n" , age)
fmt.Println(reflect.TypeOf(age))
}
输出：
float64
float64
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