Anyone know a better way to do this? The goal is for a custom defined Field to be casted back again from a string to its int type.
switch val.Kind() {
case reflect.Int:
intID, err := strconv.ParseInt(id, 10, 0)
if err != nil {
return err
}
val.Set(reflect.ValueOf(int(intID)))
case reflect.Int8:
intID, err := strconv.ParseInt(id, 10, 8)
if err != nil {
return err
}
val.Set(reflect.ValueOf(int8(intID)))
case reflect.Int16:
intID, err := strconv.ParseInt(id, 10, 16)
if err != nil {
return err
}
val.Set(reflect.ValueOf(int16(intID)))
case reflect.Int32:
intID, err := strconv.ParseInt(id, 10, 32)
if err != nil {
return err
}
val.Set(reflect.ValueOf(int32(intID)))
case reflect.Int64:
intID, err := strconv.ParseInt(id, 10, 64)
if err != nil {
return err
}
val.Set(reflect.ValueOf(intID))
}
You can use Value.SetInt / Value.SetUint:
func setId(id string, v interface{}) {
// error checking is left as an exercise
val := reflect.ValueOf(v).Elem() // this will panic if v isn't a pointer
switch val.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
idn, _ := strconv.ParseInt(id, 10, 64)
if val.OverflowInt(idn) {
// handle large values
}
val.SetInt(idn)
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
idn, _ := strconv.ParseUint(id, 10, 64)
if val.OverflowUint(idn) {
// handle large values
}
val.SetUint(idn)
}
}