Method escape_string

aiscript-lexer/src/lib.rs:811–839

(&mut self, input: &str)

    }

    pub fn escape_string(&mut self, input: &str) -> Option<String> {
        let mut escaped_string = String::new();
        let mut chars = input.chars();
        while let Some(ch) = chars.next() {
            if ch == '\\' {
                let c = match chars.next() {
                    Some('n') => '\n',
                    Some('r') => '\r',
                    Some('t') => '\t',
                    Some('\\') => '\\',
                    Some('\'') => '\'',
                    Some('\"') => '\"',
                    Some('0') => '\0',
                    Some(ch) => {
                        self.error(&format!("Invalid escape sequence: \\{}", ch));
                        return None;
                    }
                    None => {
                        self.error("Unterminated escape sequence");
                        return None;
                    }
                };
                escaped_string.push(c);
            } else {
                escaped_string.push(ch);
            }
        }
        Some(escaped_string)
    }

    pub fn advance(&mut self) {
        self.previous = mem::take(&mut self.current);