Method eat_token

src/program/serde.rs:124–130

(&mut self, token: &str)

    }

    pub fn eat_token(&mut self, token: &str) -> Result<()> {
        if self.input.starts_with(token) {
            self.input = self.input[token.len()..].trim();
            return Ok(());
        }
        eyre::bail!("input `{}` should start with {token}.", self.input)
    }

    pub fn is_next_token(&self, token: &str) -> bool {
        self.input.starts_with(token)