common

func IsAlpha ¶

func IsAlpha(r rune) bool

func IsAlphanumeric ¶

func IsAlphanumeric(r rune) bool

func IsDigit ¶

func IsDigit(r rune) bool

func IsLowerAlpha ¶

func IsLowerAlpha(r rune) bool

func IsSpecialCharacter ¶

func IsSpecialCharacter(r rune) bool

func IsText ¶

func IsText(value string) bool

IsText checks the given value to contain only visible characters and various whitespaces, including line breaks. No ring bells and other control characters. The value is allowed to be empty.

func IsTitle ¶

func IsTitle(value string) bool

IsTitle checks the given value is a single non-empty line with neither leading nor trailing spaces. It must contain only printable characters and single ASCII spaces (a space must not follow a space). No tabulations, no unbreakable spaces, no ring bells and other control characters.

func IsUpperAlpha ¶

func IsUpperAlpha(r rune) bool