Method check_next

aiscript-lexer/src/lib.rs:278–291

Looks ahead at the next N characters without consuming them

(&self, n: usize)

    // Looks ahead at the next N characters without consuming them
    fn check_next(&self, n: usize) -> Option<&str> {
        let mut chars = self.source[self.current..].char_indices();
        match chars.nth(n - 1) {
            Some((end_offset, ch)) => {
                let end = self.current + end_offset + ch.len_utf8();
                if end <= self.source.len() {
                    Some(&self.source[self.current..end])
                } else {
                    None
                }
            }
            None => None,
        }
    }

    // Returns the next 2 characters as a string slice
    fn next2(&mut self) -> &str {