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use std::io;
use std::fmt;
pub type BindingResult<T> = std::result::Result<T, BindingError>;
#[derive(Debug)]
pub struct BindingError {
repr: Repr,
}
#[derive(Debug)]
enum Repr {
Simple(String),
IoErr(io::Error),
}
pub fn new(msg: String) -> BindingError {
BindingError {
repr: Repr::Simple(msg),
}
}
impl fmt::Display for BindingError {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self.repr {
Repr::Simple(ref err_str) => f.pad(err_str),
Repr::IoErr(ref err) => err.fmt(f),
}
}
}
impl std::error::Error for BindingError {
fn description(&self) -> &str {
match self.repr {
Repr::Simple(ref msg) => msg.as_str(),
Repr::IoErr(ref err) => err.description(),
}
}
fn cause(&self) -> Option<&dyn std::error::Error> {
match self.repr {
Repr::Simple(ref _msg) => None,
Repr::IoErr(ref err) => Some(err),
}
}
}
impl From<io::Error> for BindingError {
#[inline]
fn from(err: io::Error) -> Self {
Self {
repr: Repr::IoErr(err),
}
}
}