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use std::{error, fmt};
#[derive(Copy, Clone, PartialEq, Eq)]
pub enum Error {
InvalidChar(char),
OddLengthString(usize),
InvalidLength(usize, usize),
}
impl fmt::Debug for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
Error::InvalidChar(ch) => write!(f, "invalid hex character {}", ch),
Error::OddLengthString(ell) => write!(f, "odd hex string length {}", ell),
Error::InvalidLength(ell, ell2) => write!(f, "bad hex string length {} (expected {})", ell2, ell),
}
}
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
fmt::Debug::fmt(self, f)
}
}
impl error::Error for Error {
fn cause(&self) -> Option<&error::Error> {
None
}
fn description(&self) -> &str {
match *self {
Error::InvalidChar(_) => "invalid hex character",
Error::OddLengthString(_) => "odd hex string length",
Error::InvalidLength(_, _) => "bad hex string length",
}
}
}