Go语言中使用反射的方法
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2020-12-25
19:52:18
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Go语言中使用反射的方法语言中使用反射的方法
本文实例讲述了Go语言中使用反射的方法。分享给大家供大家参考。具体实现方法如下：
代码如下:// Data Model
type Dish struct {
Id int
Name string
Origin string
Query func()
}
创建实例如下：
代码如下:shabushabu = Dish.new
shabushabu.instance_variables # => [] shabushabu.name = “Shabu-Shabu”
shabushabu.instance_variables # => [“@name”] shabushabu.origin = “Japan”
shabushabu.instance_variables # => [“@name”, “@origin”]
完整代码如下：
代码如下:package main
import(
“fmt”
“reflect”
)
func main(){
// iterate through the attributes of a Data Model instance
for name, mtype := range attributes(&Dish{}) {
fmt.Printf(“Name: %s, Type %s”, name, mtype.Name())
}
}
// Data Model
type Dish struct {
Id int
Name string
Origin string
Query func()
}
// Example of how to use Go’s reflection
// Print the attributes of a Data Model
func attributes(m interface{}) (map[string]reflect.Type) {
typ := reflect.TypeOf(m)
// if a pointer to a struct is passed, get the type of the dereferenced object
if typ.Kind() == reflect.Ptr{
typ = typ.Elem()
}
// create an attribute data structure as a map of types keyed by a string.
attrs := make(map[string]reflect.Type)
// Only structs are supported so return an empty result if the passed object
// isn’t a struct
if typ.Kind() != reflect.Struct {
fmt.Printf(“%v type can’t have attributes inspected”, typ.Kind())
return attrs
}
// loop through the struct’s fields and set the map
for i := 0; i < typ.NumField(); i++ {
p := typ.Field(i)
if !p.Anonymous {
attrs[p.Name] = p.Type
}
}
return attrs
}
希望本文所述对大家的Go语言程序设计有所帮助。
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