Method next_ch

cranelift/reader/src/lexer.rs:159–174

Advance to the next character. Return the next lookahead character, or None when the end is encountered. Always update cur_ch to reflect

(&mut self)

    // Return the next lookahead character, or None when the end is encountered.
    // Always update cur_ch to reflect
    fn next_ch(&mut self) -> Option<char> {
        if self.lookahead == Some('\n') {
            self.line_number += 1;
        }
        match self.chars.next() {
            Some((idx, ch)) => {
                self.pos = idx;
                self.lookahead = Some(ch);
            }
            None => {
                self.pos = self.source.len();
                self.lookahead = None;
            }
        }
        self.lookahead
    }

    // Get the location corresponding to `lookahead`.
    fn loc(&self) -> Location {