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//! Error handling for application manifest embedding.
use std::fmt::{self, Display, Formatter};
use std::io::{self, ErrorKind};
/// The error type which is returned when application manifest embedding fails.
#[derive(Debug)]
pub struct Error {
repr: Repr,
}
#[derive(Debug)]
enum Repr {
IoError(io::Error),
UnknownTarget,
}
impl Error {
pub(crate) fn unknown_target() -> Error {
Error {
repr: Repr::UnknownTarget,
}
}
}
impl Display for Error {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
match self.repr {
Repr::IoError(ref e) => write!(f, "I/O error: {}", e),
Repr::UnknownTarget => f.write_str("unknown target"),
}
}
}
impl std::error::Error for Error {
fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
match self.repr {
Repr::IoError(ref e) => Some(e),
_ => None,
}
}
}
impl From<io::Error> for Error {
fn from(e: io::Error) -> Self {
Error { repr: Repr::IoError(e) }
}
}
impl From<Error> for io::Error {
fn from(e: Error) -> Self {
match e.repr {
Repr::IoError(ioe) => ioe,
_ => io::Error::new(ErrorKind::Other, e),
}
}
}