Enum Error 

pub enum Error {
    GuessingFormatFailed(String),
    OpeningImageFailed(String),
}

Enum representing all possible values the application can fail.

Variants

GuessingFormatFailed(String)

Failed to guess the image format.

OpeningImageFailed(String)

Failed to open image file.

Implementations

impl Error

pub fn print_error<W: Write>(&self, err_out: &mut W)

Get the executable exit value from an Error instance.

Examples

let mut out = Vec::new();
Error::GuessingFormatFailed("not_image.rs".to_string()).print_error(&mut out);
assert_eq!(String::from_iter(out.iter().map(|&i| i as char)),
           "Failed to guess format of \"not_image.rs\".\n".to_string());

pub fn exit_value(&self) -> i32

Get the executable exit value from an Error instance.

Examples

assert_eq!(Error::GuessingFormatFailed("".to_string()).exit_value(), 1);
assert_eq!(Error::OpeningImageFailed("".to_string()).exit_value(), 2);

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 Hash for Error

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 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