length.go 662 B

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  1. package validate
  2. import (
  3. "errors"
  4. )
  5. // Validation error.
  6. var (
  7. ErrTooFewChars = errors.New("too few characters")
  8. ErrTooManyChars = errors.New("too many characters")
  9. )
  10. // MaxLength validates the length of a string as being less than or equal to a given maximum.
  11. func MaxLength(l int) func(string) error {
  12. return func(value string) error {
  13. if len(value) > l {
  14. return ErrTooManyChars
  15. }
  16. return nil
  17. }
  18. }
  19. // MinLength validates the length of a string as being greater than or equal to a given minimum.
  20. func MinLength(l int) func(string) error {
  21. return func(value string) error {
  22. if len(value) < l {
  23. return ErrTooFewChars
  24. }
  25. return nil
  26. }
  27. }