surrealdb_core/syn/lexer/compound/
regex.rs

1use regex::Regex;
2
3use crate::syn::{
4	error::{bail, syntax_error, SyntaxError},
5	lexer::Lexer,
6	token::{t, Token},
7};
8
9pub fn regex(lexer: &mut Lexer, start: Token) -> Result<Regex, SyntaxError> {
10	assert_eq!(start.kind, t!("/"), "Invalid start token of regex compound");
11	lexer.scratch.clear();
12
13	loop {
14		match lexer.reader.next() {
15			Some(b'\\') => {
16				// We can't just eat all bytes after a \ because a byte might be non-ascii.
17				if lexer.eat(b'/') {
18					lexer.scratch.push('/');
19				} else {
20					lexer.scratch.push('\\');
21				}
22			}
23			Some(b'/') => break,
24			Some(x) => {
25				if !x.is_ascii() {
26					match lexer.reader.complete_char(x) {
27						Err(e) => {
28							let span = lexer.current_span();
29							bail!("Invalid token: {e}", @span);
30						}
31						Ok(x) => {
32							lexer.scratch.push(x);
33						}
34					}
35				} else {
36					lexer.scratch.push(x as char);
37				}
38			}
39			None => {
40				let span = lexer.current_span();
41				bail!("Failed to lex regex, unexpected eof", @span);
42			}
43		}
44	}
45
46	let span = lexer.current_span();
47	let regex = lexer.scratch.parse().map_err(|e| syntax_error!("Invalid regex: {e}", @span))?;
48	lexer.scratch.clear();
49	Ok(regex)
50}
surrealdb_core/syn/lexer/compound/regex.rs

surrealdb_core/syn/lexer/compound/
regex.rs
