error.rs

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25

use std::fmt;


#[derive(Debug, Clone, PartialEq, Eq)]
pub struct Error {
    pub message: String,
    pub position: usize,
}


impl Error {
    pub fn new(message: impl Into<String>, position: usize) -> Error {
        Error {message: message.into(), position}
    }
}


impl fmt::Display for Error {
    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
        write!(formatter, "{} (at character {})", self.message, self.position + 1)
    }
}


impl std::error::Error for Error {}