reflect.Kind() Function in Golang with Examples
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() stringParameters: 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:
// Golang program to illustrate // reflect.Kind() Function package main import ( "fmt" "reflect" ) type temp struct { ord int cId int } // function to use the // Kind() method func useKind(val interface{}) { s1 := reflect.TypeOf(val) // Kind() function is used // to find the kind s2 := s1.Kind() fmt.Println( "Type " , s1) fmt.Println( "Kind " , s2) } // Main function func main() { val := temp{ ord: 1, cId: 513, } useKind(val) } |
Output:
Type main.temp Kind struct
Example 2:
// Golang program to illustrate // reflect.Kind() Function package main import ( "fmt" "reflect" ) type temp struct { ord int cId int } // function to use the // Kind() method func useKind(val interface{}) { // Kind() function is used // to find the kind 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)) } } } // Main function 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
Contact Us