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use std::error::Error;
use std::fmt;
use std::fmt::Display;
use std::io;
use std::time::SystemTimeError;
#[cfg(test)]
#[path = "./error_test.rs"]
mod error_test;
#[derive(Debug)]
pub enum FsIOError {
PathAlreadyExists(String),
NotFile(String),
IOError(String, Option<io::Error>),
SystemTimeError(String, Option<SystemTimeError>),
}
impl Display for FsIOError {
fn fmt(&self, formatter: &mut fmt::Formatter) -> Result<(), fmt::Error> {
match self {
Self::PathAlreadyExists(ref message) => write!(formatter, "{}", message),
Self::NotFile(ref message) => write!(formatter, "{}", message),
Self::IOError(ref message, ref cause) => {
writeln!(formatter, "{}", message)?;
match cause {
Some(cause_err) => cause_err.fmt(formatter),
None => Ok(()),
}
}
Self::SystemTimeError(ref message, ref cause) => {
writeln!(formatter, "{}", message)?;
match cause {
Some(cause_err) => cause_err.fmt(formatter),
None => Ok(()),
}
}
}
}
}
impl Error for FsIOError {
fn source(&self) -> Option<&(dyn Error + 'static)> {
match self {
Self::PathAlreadyExists(_) => None,
Self::NotFile(_) => None,
Self::IOError(_, error) => error.as_ref().map(|io_error| {
let std_error: &dyn Error = io_error;
std_error
}),
Self::SystemTimeError(_, error) => error.as_ref().map(|system_time_error| {
let std_error: &dyn Error = system_time_error;
std_error
}),
}
}
}