Golang reflect.StructField() example

package reflect

Golang reflect.StructField() usage example

 package main

 import (
  "fmt"
  "reflect"
 )

 type A struct {
  A  fmt.ScanState "Tag A" // index 0
  AB B "Tag A of type B struct" // index 1
  B  "Tag B" // index 2 -embedded field
 }
 type B struct {
  B0 string
  B1 int
 }

 func main() {
  var a A
  var typeof reflect.Type = reflect.TypeOf(a)

  var field reflect.StructField = typeof.Field(0) // index 0

  fmt.Println("Name : ", field.Name)
  fmt.Println("PkgPath : ", field.PkgPath) //<--- only applicable if the field name is small cap(unexported)
  fmt.Println("Type : ", field.Type)
  fmt.Println("Tag : ", field.Tag)
  fmt.Println("Offset : ", field.Offset)
  fmt.Println("Index : ", field.Index)
  fmt.Println("Anonymous : ", field.Anonymous)

  fmt.Println("// --------------------------------------------------")

  field = typeof.Field(1) // index 1

  fmt.Println("Name : ", field.Name)
  fmt.Println("PkgPath : ", field.PkgPath) //<--- only applicable if the field name is small cap(unexported)
  fmt.Println("Type : ", field.Type)
  fmt.Println("Tag : ", field.Tag)
  fmt.Println("Offset : ", field.Offset)
  fmt.Println("Index : ", field.Index)
  fmt.Println("Anonymous : ", field.Anonymous)

  fmt.Println("// --------------------------------------------------")
  field = typeof.Field(2) // index 2

  fmt.Println("Name : ", field.Name)
  fmt.Println("PkgPath : ", field.PkgPath) //<--- only applicable if the field name is small cap(unexported)
  fmt.Println("Type : ", field.Type)
  fmt.Println("Tag : ", field.Tag)
  fmt.Println("Offset : ", field.Offset)
  fmt.Println("Index : ", field.Index)
  fmt.Println("Anonymous : ", field.Anonymous) // TRUE because it is embedded field

 }

Play at : http://play.golang.org/p/JjzPzPe8UP

Reference :

http://golang.org/pkg/reflect/#StructField