reflect.Kind() Function in Golang with Examples
Last Updated :
28 Apr, 2020
Go language provides inbuilt support implementation of run-time reflection and allowing a program to manipulate objects with arbitrary types with the help of reflect package. The reflect.Kind() Function in Golang is used to find the name of kind. To access this function, one needs to imports the reflect package in the program.
Syntax:
func (k Kind) String() string
Parameters: This function does not takes any parameters.
Return Value: This function returns string (the name of kind).
Below examples illustrate the use of above method in Golang:
Example 1:
package main
import (
"fmt"
"reflect"
)
type temp struct {
ord int
cId int
}
func useKind(val interface{}) {
s1 := reflect.TypeOf(val)
s2 := s1.Kind()
fmt.Println( "Type " , s1)
fmt.Println( "Kind " , s2)
}
func main() {
val := temp{
ord: 1,
cId: 513,
}
useKind(val)
}
|
Output:
Type main.temp
Kind struct
Example 2:
package main
import (
"fmt"
"reflect"
)
type temp struct {
ord int
cId int
}
func useKind(val interface{}) {
if reflect.ValueOf(val).Kind() == reflect.Struct {
v := reflect.ValueOf(val)
fmt.Println( "Number of fields" , v.NumField())
for i := 0; i < v.NumField(); i++ {
fmt.Printf( "Field: %d \t type: %T \t value: %v\n" ,
i, v.Field(i), v.Field(i))
}
}
}
func main() {
val := temp{
ord: 1,
cId: 513,
}
useKind(val)
}
|
Output:
Number of fields 2
Field: 0 type: reflect.Value value: 1
Field: 1 type: reflect.Value value: 513
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