Enum IoError 

pub enum IoError {
    InvalidFormat {
        reason: &'static str,
    },
    UnsupportedFeature {
        reason: &'static str,
    },
    DecodeFailed {
        source: Box<dyn Error + Send + Sync>,
    },
    EncodeFailed {
        source: Box<dyn Error + Send + Sync>,
    },
    Io(Error),
}

Crate-level I/O error.

Each variant classifies what went wrong. Variants that wrap a codec error carry a type-erased source via Box<dyn Error + Send + Sync>, keeping this type codec-agnostic (no feature-gated fields).

Match on the enum directly to branch on the error category.

Examples

use fovea_io::IoError;

let err = IoError::InvalidFormat { reason: "not a PNG file" };
assert_eq!(err.to_string(), "invalid format: not a PNG file");

match err {
    IoError::InvalidFormat { reason } => assert_eq!(reason, "not a PNG file"),
    _ => unreachable!(),
}

Variants

InvalidFormat

The input bytes don’t match the expected format signature.

Fields

reason: &'static str

A short, static description of why the format is invalid.

UnsupportedFeature

The file is structurally valid but contains data we can’t decode (e.g. unsupported bit depth, compression method, colour type).

Fields

reason: &'static str

A short, static description of the unsupported feature.

DecodeFailed

The codec reported a corruption or constraint violation during decoding. The wrapped source carries the codec-specific detail.

Fields

source: Box<dyn Error + Send + Sync>

The underlying codec error.

EncodeFailed

An encoding operation failed. The wrapped source carries the codec-specific detail.

Fields

source: Box<dyn Error + Send + Sync>

The underlying codec error.

Io(Error)

A standard I/O error (read/write/seek failure).

Trait Implementations

impl Debug for IoError

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

Formats the value using the given formatter.

impl Display for IoError

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

Formats the value using the given formatter.

impl Error for IoError

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 From<Error> for IoError

fn from(source: Error) -> Self

Converts to this type from the input type.