crftng-intrprtrs/src/lexer/error.rs

use core::fmt;
use std::error::Error;

#[derive(Debug)]
pub struct LexingError {
	pub line: usize,
	pub kind: LexingErrorKind,
}

impl fmt::Display for LexingError {
	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
		write!(f, "Error: {}\n on line: {}", self.kind, self.line)
	}
}

impl Error for LexingError {
	fn source(&self) -> Option<&(dyn Error + 'static)> {
		Some(&self.kind)
	}
}

#[derive(Debug)]
pub enum LexingErrorKind {
	UnmatchedQuote,
	UnexpectedCharacter(char),
}

impl fmt::Display for LexingErrorKind {
	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
		match *self {
			LexingErrorKind::UnmatchedQuote => write!(f, "Unmatched \" character"),
			LexingErrorKind::UnexpectedCharacter(c) => write!(f, "Unexpected character {c}"),
		}
	}
}

impl Error for LexingErrorKind {}