Enum Error 

pub enum Error {
    DataTooLarge,
    InvalidImage(&'static str),
    Corrupted(&'static str),
    Unsupported(&'static str),
}

Errors produced by roka-qr.

All fallible operations in this crate return Result<T, Error>. Variants are intentionally coarse — most callers only need to distinguish “the input was malformed” from “the QR was readable but couldn’t be recovered”.

Variants

DataTooLarge

Payload is larger than what fits in QR version 40 at the chosen EC level.

InvalidImage(&'static str)

Image bytes are not a valid PNG / PBM / supported format.

Corrupted(&'static str)

The QR code was found in the image, but its data could not be recovered (too many errors, or unsupported encoding mode).

Unsupported(&'static str)

The QR uses a feature this crate does not implement (e.g. kanji mode).

Trait Implementations

impl Clone for Error

fn clone(&self) -> Error

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

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 Error

fn eq(&self, other: &Error) -> 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 Eq for Error

impl StructuralPartialEq for Error