go语言中interface实现泛型编程

package main

import (
"fmt"
"reflect"
)

type GenericSlice struct {
elemType reflect.Type
sliceValue reflect.Value
}

func (self *GenericSlice) Init(sample interface{}) {
value := reflect.ValueOf(sample)
self.sliceValue = reflect.MakeSlice(value.Type(), 0, 0)
self.elemType = reflect.TypeOf(sample).Elem()
}

func (self *GenericSlice) Append(e interface{}) bool {
if reflect.TypeOf(e) != self.elemType {
return false
}
self.sliceValue = reflect.Append(self.sliceValue, reflect.ValueOf(e))
return true
}

func (self *GenericSlice) ElemType() reflect.Type {
return self.elemType
}

func (self *GenericSlice) Interface() interface{} {
return self.sliceValue.Interface()
}

func main() {
gs := GenericSlice{}
gs.Init(make([]int, 0))
fmt.Printf("Element Type: %s\n", gs.ElemType().Kind()) // => Element Type:int result := gs.Append(2)
fmt.Printf("Result: %v\n", result) // => Result: true
fmt.Printf("sliceValue: %v\n", gs.Interface()) // => sliceValue: [2]
}

本文来自:开源中国博客

感谢作者:webyh

查看原文:go语言中interface实现泛型编程

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