Struct TagNumber

pub struct TagNumber(/* private fields */);

ASN.1 tag numbers (i.e. lower 5 bits of a Tag).

From X.690 Section 8.1.2.2:

bits 5 to 1 shall encode the number of the tag as a binary integer with bit 5 as the most significant bit.

This library supports tag numbers ranging from zero to 30 (inclusive), which can be represented as a single identifier octet.

Section 8.1.2.4 describes how to support multi-byte tag numbers, which are encoded by using a leading tag number of 31 (0b11111). This library deliberately does not support this: tag numbers greater than 30 are disallowed.

Implementations

impl TagNumber

pub const N0: Self = _

Tag number 0

pub const N1: Self = _

Tag number 1

pub const N2: Self = _

Tag number 2

pub const N3: Self = _

Tag number 3

pub const N4: Self = _

Tag number 4

pub const N5: Self = _

Tag number 5

pub const N6: Self = _

Tag number 6

pub const N7: Self = _

Tag number 7

pub const N8: Self = _

Tag number 8

pub const N9: Self = _

Tag number 9

pub const N10: Self = _

Tag number 10

pub const N11: Self = _

Tag number 11

pub const N12: Self = _

Tag number 12

pub const N13: Self = _

Tag number 13

pub const N14: Self = _

Tag number 14

pub const N15: Self = _

Tag number 15

pub const N16: Self = _

Tag number 16

pub const N17: Self = _

Tag number 17

pub const N18: Self = _

Tag number 18

pub const N19: Self = _

Tag number 19

pub const N20: Self = _

Tag number 20

pub const N21: Self = _

Tag number 21

pub const N22: Self = _

Tag number 22

pub const N23: Self = _

Tag number 23

pub const N24: Self = _

Tag number 24

pub const N25: Self = _

Tag number 25

pub const N26: Self = _

Tag number 26

pub const N27: Self = _

Tag number 27

pub const N28: Self = _

Tag number 28

pub const N29: Self = _

Tag number 29

pub const N30: Self = _

Tag number 30

pub const fn new(byte: u8) -> Self

Create a new tag number (const-friendly).

Panics if the tag number is greater than 30. For a fallible conversion, use TryFrom instead.

pub fn application(self, constructed: bool) -> Tag

Create an APPLICATION tag with this tag number.

pub fn context_specific(self, constructed: bool) -> Tag

Create a CONTEXT-SPECIFIC tag with this tag number.

pub fn private(self, constructed: bool) -> Tag

Create a PRIVATE tag with this tag number.

pub fn value(self) -> u8

Get the inner value.

Trait Implementations

impl Clone for TagNumber

fn clone(&self) -> TagNumber

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for TagNumber

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

Formats the value using the given formatter.

impl Display for TagNumber

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

Formats the value using the given formatter.

impl From<TagNumber> for u8

fn from(tag_number: TagNumber) -> u8

Converts to this type from the input type.

impl Ord for TagNumber

fn cmp(&self, other: &TagNumber) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for TagNumber

fn eq(&self, other: &TagNumber) -> 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 PartialOrd for TagNumber

fn partial_cmp(&self, other: &TagNumber) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl TryFrom<u8> for TagNumber

type Error = Error

The type returned in the event of a conversion error.

fn try_from(byte: u8) -> Result<Self>

Performs the conversion.

impl Copy for TagNumber

impl Eq for TagNumber

impl StructuralPartialEq for TagNumber