func (v *Validate) GetStructFieldOK(current reflect.Value, namespace string) (reflect.Value, reflect.Kind, bool) {
	current, kind := v.ExtractType(current)
	if kind == reflect.Invalid {
		return current, kind, false
	}
	if namespace == blank {
		return current, kind, true
	}
	switch kind {
	case reflect.Ptr, reflect.Interface:
		return current, kind, false
	case reflect.Struct:
		typ := current.Type()
		fld := namespace
		ns := namespace
		if typ != timeType && typ != timePtrType {
			idx := strings.Index(namespace, namespaceSeparator)
			if idx != -1 {
				fld = namespace[:idx]
				ns = namespace[idx+1:]
			} else {
				ns = blank
				idx = len(namespace)
			}
			bracketIdx := strings.Index(fld, leftBracket)
			if bracketIdx != -1 {
				fld = fld[:bracketIdx]
				ns = namespace[bracketIdx:]
			}
			current = current.FieldByName(fld)
			return v.GetStructFieldOK(current, ns)
		}
	case reflect.Array, reflect.Slice:
		idx := strings.Index(namespace, leftBracket)
		idx2 := strings.Index(namespace, rightBracket)
		arrIdx, _ := strconv.Atoi(namespace[idx+1 : idx2])
		if arrIdx >= current.Len() {
			return current, kind, false
		}
		startIdx := idx2 + 1
		if startIdx < len(namespace) {
			if namespace[startIdx:startIdx+1] == namespaceSeparator {
				startIdx++
			}
		}
		return v.GetStructFieldOK(current.Index(arrIdx), namespace[startIdx:])
	case reflect.Map:
		idx := strings.Index(namespace, leftBracket) + 1
		idx2 := strings.Index(namespace, rightBracket)
		endIdx := idx2
		if endIdx+1 < len(namespace) {
			if namespace[endIdx+1:endIdx+2] == namespaceSeparator {
				endIdx++
			}
		}
		key := namespace[idx:idx2]
		switch current.Type().Key().Kind() {
		case reflect.Int:
			i, _ := strconv.Atoi(key)
			return v.GetStructFieldOK(current.MapIndex(reflect.ValueOf(i)), namespace[endIdx+1:])
		case reflect.Int8:
			i, _ := strconv.ParseInt(key, 10, 8)
			return v.GetStructFieldOK(current.MapIndex(reflect.ValueOf(int8(i))), namespace[endIdx+1:])
		case reflect.Int16:
			i, _ := strconv.ParseInt(key, 10, 16)
			return v.GetStructFieldOK(current.MapIndex(reflect.ValueOf(int16(i))), namespace[endIdx+1:])
		case reflect.Int32:
			i, _ := strconv.ParseInt(key, 10, 32)
			return v.GetStructFieldOK(current.MapIndex(reflect.ValueOf(int32(i))), namespace[endIdx+1:])
		case reflect.Int64:
			i, _ := strconv.ParseInt(key, 10, 64)
			return v.GetStructFieldOK(current.MapIndex(reflect.ValueOf(i)), namespace[endIdx+1:])
		case reflect.Uint:
			i, _ := strconv.ParseUint(key, 10, 0)
			return v.GetStructFieldOK(current.MapIndex(reflect.ValueOf(uint(i))), namespace[endIdx+1:])
		case reflect.Uint8:
			i, _ := strconv.ParseUint(key, 10, 8)
			return v.GetStructFieldOK(current.MapIndex(reflect.ValueOf(uint8(i))), namespace[endIdx+1:])
		case reflect.Uint16:
			i, _ := strconv.ParseUint(key, 10, 16)
			return v.GetStructFieldOK(current.MapIndex(reflect.ValueOf(uint16(i))), namespace[endIdx+1:])
		case reflect.Uint32:
			i, _ := strconv.ParseUint(key, 10, 32)
			return v.GetStructFieldOK(current.MapIndex(reflect.ValueOf(uint32(i))), namespace[endIdx+1:])
		case reflect.Uint64:
			i, _ := strconv.ParseUint(key, 10, 64)
			return v.GetStructFieldOK(current.MapIndex(reflect.ValueOf(i)), namespace[endIdx+1:])
		case reflect.Float32:
			f, _ := strconv.ParseFloat(key, 32)
			return v.GetStructFieldOK(current.MapIndex(reflect.ValueOf(float32(f))), namespace[endIdx+1:])
		case reflect.Float64:
			f, _ := strconv.ParseFloat(key, 64)
			return v.GetStructFieldOK(current.MapIndex(reflect.ValueOf(f)), namespace[endIdx+1:])
		case reflect.Bool:
			b, _ := strconv.ParseBool(key)
			return v.GetStructFieldOK(current.MapIndex(reflect.ValueOf(b)), namespace[endIdx+1:])
		default:
			return v.GetStructFieldOK(current.MapIndex(reflect.ValueOf(key)), namespace[endIdx+1:])
		}
	}
	panic("Invalid field namespace")
}
GetStructFieldOK traverses a struct to retrieve a specific field denoted by the provided namespace and
returns the field, field kind and whether is was successful in retrieving the field at all.
NOTE: when not successful ok will be false, this can happen when a nested struct is nil and so the field
could not be retrived because it didnt exist.
package validator
import (
	"fmt"
	"reflect"
	"strconv"
	"strings"
)
const (
	dash               = "-"
	blank              = ""
	namespaceSeparator = "."
	leftBracket        = "["
	rightBracket       = "]"
	restrictedTagChars = ".[],|=+()`~!@#$%^&*\\\"/?<>{}"
	restrictedAliasErr = "Alias '%s' either contains restricted characters or is the same as a restricted tag needed for normal operation"
	restrictedTagErr   = "Tag '%s' either contains restricted characters or is the same as a restricted tag needed for normal operation"
)
var (
	restrictedTags = map[string]*struct{}{
		diveTag:           emptyStructPtr,
		existsTag:         emptyStructPtr,
		structOnlyTag:     emptyStructPtr,
		omitempty:         emptyStructPtr,
		skipValidationTag: emptyStructPtr,
		utf8HexComma:      emptyStructPtr,
		utf8Pipe:          emptyStructPtr,
		noStructLevelTag:  emptyStructPtr,
	}
)
func (v *Validate) ExtractType(current reflect.Value) (reflect.Value, reflect.Kind) {
	switch current.Kind() {
	case reflect.Ptr:
		if current.IsNil() {
			return current, reflect.Ptr
		}
		return v.ExtractType(current.Elem())
	case reflect.Interface:
		if current.IsNil() {
			return current, reflect.Interface
		}
		return v.ExtractType(current.Elem())
	case reflect.Invalid:
		return current, reflect.Invalid
	default:
		if v.hasCustomFuncs {
			if fn, ok := v.customTypeFuncs[current.Type()]; ok {
				return v.ExtractType(reflect.ValueOf(fn(current)))
			}
		}
		return current, current.Kind()
	}
}