Enum DtmfDigit 

pub enum DtmfDigit {
    D0,
    D1,
    D2,
    D3,
    D4,
    D5,
    D6,
    D7,
    D8,
    D9,
    Star,
    Pound,
    A,
    B,
    C,
    D,
}

A single DTMF digit per RFC 4733 §2.5.2.1 event codes 0-15.

D0-D9, Star, Pound, A-D. The letter variants are vestigial (US AUTOVON keypad) and almost never appear in practice; consumers should typically only expose the digits and * # in their UI.

Variants

D0

D1

D2

D3

D4

D5

D6

D7

D8

D9

Star

Pound

A

B

C

D

Implementations

impl DtmfDigit

pub fn from_char(c: char) -> Option<Self>

Parse a digit from one of 0-9, *, #, or A-D (case-insensitive for the letters). Returns None for anything else, including whitespace.

pub fn as_char(self) -> char

The canonical character for this digit, e.g. 5 for D5, * for Star, A (uppercase) for A.

pub fn from_event_code(code: u8) -> Option<Self>

Map an RFC 4733 §2.5.2.1 event code back to a digit — the inverse of DtmfDigit::event_code. Returns None for codes ≥ 16 (flash-hook and the other non-DTMF telephone events).

pub fn event_code(self) -> u8

The RFC 4733 §2.5.2.1 event code (0-15) for this digit.

Trait Implementations

impl Clone for DtmfDigit

fn clone(&self) -> DtmfDigit

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for DtmfDigit

impl Debug for DtmfDigit

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

Formats the value using the given formatter.

impl Eq for DtmfDigit

impl Hash for DtmfDigit

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for DtmfDigit

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for DtmfDigit