126     source: &'a str,  field
144             source: s,  in new()
168                 self.pos = self.source.len();  in next_ch()
184         self.source[self.pos..].starts_with(prefix)  in looking_at()
232                 None | Some('\n') => return &self.source[begin..self.pos],  in rest_of_line()
304         let text = &self.source[begin..self.pos];  in scan_number()
325         let text = &self.source[begin..self.pos];  in scan_word()
411         token(Token::Name(&self.source[begin..end]), loc)  in scan_name()
432         token(Token::String(&self.source[begin..end]), loc)  in scan_string()
448         token(Token::HexSequence(&self.source[begin..end]), loc)  in scan_hex_sequence()
469         token(Token::SourceLoc(&self.source[begin..end]), loc)  in scan_srcloc()