rvs_parser/
error.rs

1use std::fmt;
2use std::io;
3use std::error;
4
5pub type Result<T> = ::std::result::Result<T, Error>;
6
7#[derive(Debug)]
8pub enum Error {
9    Parse(ParseError),
10    Io(io::Error),
11}
12
13#[derive(Debug)]
14pub struct ParseError {
15    pub description: String,
16}
17
18impl error::Error for Error {
19    fn cause(&self) -> Option<&dyn error::Error> {
20        match *self {
21            Error::Parse(ref err) => Some(err),
22            Error::Io(ref err) => Some(err),
23        }
24    }
25}
26
27impl fmt::Display for Error {
28    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
29        match *self {
30            Error::Parse(ref err) => err.fmt(f),
31            Error::Io(ref err) => err.fmt(f),
32        }
33    }
34}
35
36impl From<io::Error> for Error {
37    fn from(err: io::Error) -> Error {
38        Error::Io(err)
39    }
40}
41
42impl From<ParseError> for Error {
43    fn from(err: ParseError) -> Error {
44        Error::Parse(err)
45    }
46}
47
48pub type ParseResult<T> = ::std::result::Result<T, ParseError>;
49
50impl ParseError {
51    pub fn new(description: String) -> ParseError {
52        ParseError { description }
53    }
54}
55
56impl error::Error for ParseError {
57    fn description(&self) -> &str {
58        &self.description
59    }
60
61    fn cause(&self) -> Option<&dyn error::Error> {
62        None
63    }
64}
65
66impl fmt::Display for ParseError {
67    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
68        write!(f, "{}", self.description)
69    }
70}
rvs_parser/error.rs

rvs_parser/
error.rs
