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use std::fmt;
use thiserror::Error;
use crate::proto::{trace, ExtBacktrace};
pub type Result<T> = ::std::result::Result<T, Error>;
#[derive(Eq, PartialEq, Debug, Error, Clone)]
pub enum ErrorKind {
#[error("unexpected end of input")]
EOF,
#[error("illegal character input: {0}")]
IllegalCharacter(char),
#[error("illegal state: {0}")]
IllegalState(&'static str),
#[error("{0}")]
Message(&'static str),
#[error("unclosed list, missing ')'")]
UnclosedList,
#[error("unclosed quoted string")]
UnclosedQuotedString,
#[error("unrecognized character input: {0}")]
UnrecognizedChar(char),
#[error("unrecognized dollar content: {0}")]
UnrecognizedDollar(String),
#[error("unrecognized octet: {0:x}")]
UnrecognizedOctet(u32),
}
#[derive(Clone, Error, Debug)]
pub struct Error {
kind: ErrorKind,
backtrack: Option<ExtBacktrace>,
}
impl Error {
pub fn kind(&self) -> &ErrorKind {
&self.kind
}
}
impl From<ErrorKind> for Error {
fn from(kind: ErrorKind) -> Error {
Error {
kind,
backtrack: trace!(),
}
}
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
if let Some(ref backtrace) = self.backtrack {
fmt::Display::fmt(&self.kind, f)?;
fmt::Debug::fmt(backtrace, f)
} else {
fmt::Display::fmt(&self.kind, f)
}
}
}