1use codespan::Span;
2
3#[derive(Clone, Debug, Eq, PartialEq)]
4pub struct LexicalError {
5 pub err: String,
6 pub span: Span,
7}
8
9impl std::fmt::Display for LexicalError {
10 fn fmt(&self, fmt: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
11 if self.span.start().0 == 0 && self.span.end().0 == 0 {
12 write!(fmt, "{}", self.err)
13 } else {
14 write!(fmt, "{} at {:?}", self.err, self.span)
15 }
16 }
17}
18
19impl LexicalError {
20 pub fn new<E: ToString>(err: E, span: Span) -> Self {
21 LexicalError {
22 err: err.to_string(),
23 span,
24 }
25 }
26}