length.go 672 B

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  1. package validate
  2. var (
  3. ErrMustBeLonger = NewError("must contain at least %d characters")
  4. ErrMustBeShorter = NewError("must contain no more than %d characters")
  5. )
  6. // MaxLength validates the length of a string as being less than or equal to a given maximum.
  7. func MaxLength(l int) func(string) error {
  8. return func(value string) error {
  9. if len(value) > l {
  10. return ErrMustBeShorter.With(l)
  11. }
  12. return nil
  13. }
  14. }
  15. // MinLength validates the length of a string as being greater than or equal to a given minimum.
  16. func MinLength(l int) func(string) error {
  17. return func(value string) error {
  18. if len(value) < l {
  19. return ErrMustBeLonger.With(l)
  20. }
  21. return nil
  22. }
  23. }