37 lines
805 B
Rust
37 lines
805 B
Rust
use core::fmt;
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use std::error::Error;
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#[derive(Debug)]
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pub struct LexingError {
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pub line: usize,
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pub kind: LexingErrorKind,
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}
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impl fmt::Display for LexingError {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "Error: {}\n on line: {}", self.kind, self.line)
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}
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}
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impl Error for LexingError {
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fn source(&self) -> Option<&(dyn Error + 'static)> {
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Some(&self.kind)
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}
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}
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#[derive(Debug)]
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pub enum LexingErrorKind {
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UnmatchedQuote,
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UnexpectedCharacter(char),
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}
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impl fmt::Display for LexingErrorKind {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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match *self {
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LexingErrorKind::UnmatchedQuote => write!(f, "Unmatched \" character"),
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LexingErrorKind::UnexpectedCharacter(c) => write!(f, "Unexpected character {c}"),
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}
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}
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}
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impl Error for LexingErrorKind {}
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