Enum Format 

pub enum Format {
    Uuid,
    Email,
    Hostname,
    Ipv4,
    Ipv6,
}

A named format a string must satisfy.

Variants

Uuid

8-4-4-4-12 lowercase or uppercase hex. Any version, any variant: version bits are a fact about who generated it, not about whether the value is a UUID.

Email

A structural check only: one @, a non-empty local part, and a domain that looks like a hostname.

Deliberately not RFC 5322, which admits comments, quoted strings and nested parentheses that no mail system in use accepts. Deliberately not a deliverability check either — that needs the network, and a validator that reached the network at a boundary would be a much worse idea than a permissive check.

Hostname

A DNS hostname per RFC 1123: dot-separated labels of letters, digits and hyphens, each 1 to 63 characters, not starting or ending with a hyphen, 253 characters in total.

Ipv4

Four decimal octets. Leading zeros are rejected, because 010 is octal to some resolvers and decimal to others, and a value that means two different things on two hosts is exactly what this project exists to refuse.

Ipv6

An IPv6 address, including the :: short form and a trailing IPv4 part. Zone identifiers (%eth0) are rejected: they name an interface on one machine and mean nothing on another.

Implementations

impl Format

pub const ALL: [Format; 5]

Every name, in declaration order, for an error message that tells the author what they could have written instead.

pub fn name(self) -> &'static str

pub fn parse(name: &str) -> Option<Format>

pub fn matches(self, value: &str) -> bool

Trait Implementations

impl Clone for Format

fn clone(&self) -> Format

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Format

impl Debug for Format

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for Format

impl PartialEq for Format

fn eq(&self, other: &Format) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Format