1use super::{Context, Error, Parse, Parser};
2use decoded_char::DecodedChar;
3
4impl Parse for () {
5 fn parse_in<C, E>(
6 parser: &mut Parser<C, E>,
7 _context: Context,
8 ) -> Result<(Self, usize), Error<E>>
9 where
10 C: Iterator<Item = Result<DecodedChar, E>>,
11 {
12 let i = parser.begin_fragment();
13 match parser.next_char()? {
14 (_, Some('n')) => match parser.next_char()? {
15 (_, Some('u')) => match parser.next_char()? {
16 (_, Some('l')) => match parser.next_char()? {
17 (_, Some('l')) => {
18 parser.end_fragment(i);
19 Ok(((), i))
20 }
21 (p, unexpected) => Err(Error::unexpected(p, unexpected)),
22 },
23 (p, unexpected) => Err(Error::unexpected(p, unexpected)),
24 },
25 (p, unexpected) => Err(Error::unexpected(p, unexpected)),
26 },
27 (p, unexpected) => Err(Error::unexpected(p, unexpected)),
28 }
29 }
30}