chars.go 712 B

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  1. package validate
  2. import (
  3. "strings"
  4. )
  5. // Validation error.
  6. var (
  7. ErrDisallowedChars = NewError("contains disallowed characters")
  8. )
  9. // Chars validates whether a string contains only allowed characters.
  10. func Chars(allow string) func(string) error {
  11. return func(value string) error {
  12. for _, r := range value {
  13. if !strings.ContainsRune(allow, r) {
  14. return ErrDisallowedChars
  15. }
  16. }
  17. return nil
  18. }
  19. }
  20. // ExceptChars validates whether a string does not contain disallowed characters.
  21. func ExceptChars(disallow string) func(string) error {
  22. return func(value string) error {
  23. for _, r := range disallow {
  24. if strings.ContainsRune(value, r) {
  25. return ErrDisallowedChars
  26. }
  27. }
  28. return nil
  29. }
  30. }