is

Documentation

Overview

Package is provides pure predicates for common string formats.

Index

• func Base64(s string) bool
• func CIDR(s string) bool
• func CIDRv4(s string) bool
• func CIDRv6(s string) bool
• func CreditCard(s string) bool
• func E164(s string) bool
• func Email(s string) bool
• func FQDN(s string) bool
• func HexColor(s string) bool
• func Hostname(s string) bool
• func IP(s string) bool
• func IPv4(s string) bool
• func IPv6(s string) bool
• func JSON(s string) bool
• func JWT(s string) bool
• func Latitude(s string) bool
• func Longitude(s string) bool
• func Luhn(s string) bool
• func MAC(s string) bool
• func Semver(s string) bool
• func TimeZone(s string) bool
• func ULID(s string) bool
• func URI(s string) bool
• func URL(s string) bool
• func UUID(s string) bool

Functions

func Base64

func Base64(s string) bool

func CIDR

func CIDR(s string) bool

CIDR reports a valid CIDR notation (IPv4 or IPv6).

func CIDRv4

func CIDRv4(s string) bool

CIDRv4 reports a valid IPv4 CIDR notation.

func CIDRv6

func CIDRv6(s string) bool

CIDRv6 reports a valid IPv6 CIDR notation.

func CreditCard

func CreditCard(s string) bool

CreditCard reports a 12-19 digit card number passing Luhn; spaces and dashes between digit groups are ignored.

func E164

func E164(s string) bool

E164 reports an international phone number in E.164 form (+14155552671).

func Email

func Email(s string) bool

func FQDN

func FQDN(s string) bool

FQDN reports a fully qualified domain name (requires a TLD, unlike Hostname).

func HexColor

func HexColor(s string) bool

HexColor reports a #-prefixed hex color (3, 4, 6 or 8 digits).

func Hostname

func Hostname(s string) bool

func IP

func IP(s string) bool

func IPv4

func IPv4(s string) bool

func IPv6

func IPv6(s string) bool

func JSON

func JSON(s string) bool

JSON reports whether s is well-formed JSON (empty is not).

func JWT

func JWT(s string) bool

JWT reports the three dot-separated base64url segments of a JWT.

func Latitude

func Latitude(s string) bool

Latitude reports a decimal latitude in [-90, 90].

func Longitude

func Longitude(s string) bool

Longitude reports a decimal longitude in [-180, 180].

func Luhn

func Luhn(s string) bool

Luhn reports a digit string passing the Luhn checksum.

func MAC

func MAC(s string) bool

MAC accepts any net.ParseMAC format.

func Semver

func Semver(s string) bool

Semver reports a semantic version per semver.org (no leading "v").

func TimeZone

func TimeZone(s string) bool

TimeZone reports an IANA time zone name ("UTC", "Asia/Shanghai"); "Local" and the empty name are rejected as environment-dependent.

func ULID

func ULID(s string) bool

ULID reports a Crockford base32 ULID (case-insensitive).

func URI

func URI(s string) bool

URI requires a scheme but no host, unlike URL.

func URL

func URL(s string) bool

func UUID

func UUID(s string) bool