Enum ErrorKind 

#[non_exhaustive]
pub enum ErrorKind {
    KeyLength,
    Radix,
    Length,
    ValueRange,
    TweakLength,
    Alphabet,
    AlphabetRequired,
}

What kind of input was rejected.

One variant per exception class in the fpr-ff1 Python package, so code ported between the two maps each exception to exactly one kind:

Kind	Python exception
KeyLength	KeyLengthError
Radix	RadixError
Length	LengthError
ValueRange	ValueRangeError
TweakLength	TweakLengthError
Alphabet	AlphabetError
AlphabetRequired	FF1Error (the base class)

Python’s BackendError has no counterpart: backend selection is a Python-side concern.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

KeyLength

The key is not 16, 24 or 32 bytes.

Radix

The radix is outside 2 <= radix < 2**16.

Length

The input length is below the minimum domain for the radix, or above 2**32 - 1.

ValueRange

A numeral is not less than the radix, or a character is not in the alphabet.

TweakLength

A tweak or a tweak-length bound is outside the configured bounds or above the four-byte encodable maximum.

Alphabet

The alphabet’s length does not equal the radix, or a character repeats.

AlphabetRequired

The string interface was used without an alphabet.

Trait Implementations

impl Clone for ErrorKind

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ErrorKind

impl Debug for ErrorKind

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

Formats the value using the given formatter.

impl Eq for ErrorKind

impl Hash for ErrorKind

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 ErrorKind

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ErrorKind