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#[derive(Clone, Debug, PartialEq)]
pub struct Error {
    pub line: usize,
    pub column: usize,
    pub msg: String,
}

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

}

impl ::std::fmt::Display for Error {
    fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
        write!(f, "{} at {}:{}", self.msg, self.line, self.column)
    }
}

#[derive(Clone, Debug)]
pub struct RawError {
    pub idx: usize,
    pub msg: String,
}

impl ::std::error::Error for RawError {

}

impl ::std::fmt::Display for RawError {
    fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
        write!(f, "{} at {}", self.msg, self.idx)
    }
}