Enum IsinError 

#[non_exhaustive]
pub enum IsinError {
    Empty,
    InvalidLength {
        found: usize,
    },
    InvalidCharacter {
        character: char,
        position: u8,
        expected: CharacterClass,
    },
    InvalidCheckDigit {
        expected: u8,
        found: u8,
    },
}

The set of reasons an ISIN string can fail validation.

Every fallible constructor of Isin returns this type; each variant maps to a single, specific failure so callers can react programmatically (for example, highlighting the offending character in a form field) rather than parsing a human-readable message.

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.

Empty

The input was an empty string.

InvalidLength

After trimming surrounding whitespace, the input did not contain exactly 12 characters.

Fields

found: usize

The number of characters found after trimming.

InvalidCharacter

A character outside the allowed set was found at a given position.

Fields

character: char

The offending character, as originally provided (before case folding).

position: u8

1-indexed position within the 12 characters.

expected: CharacterClass

The character class that was expected at this position.

InvalidCheckDigit

The Luhn check digit (position 12) did not match the value computed from the first 11 characters.

Fields

expected: u8

The check digit computed by the ISO 6166 Luhn algorithm.

found: u8

The check digit actually present in the input.

Trait Implementations

impl Clone for IsinError

fn clone(&self) -> IsinError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for IsinError

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

Formats the value using the given formatter.

impl Display for IsinError

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

Formats the value using the given formatter.

impl Eq for IsinError

impl Error for IsinError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl PartialEq for IsinError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for IsinError