OPID parsing methods in Rust

rustitup.rs

impl Form {
    /// Converts legacy `__form__0` to `0`.
    pub fn get_id(&self) -> Result<i32, std::num::ParseIntError> {
        parse_form_opid(self.opid.as_str())
    }
}


impl Field {
    /// Taking the old school `"__0"` and turning it into `0`
    pub fn get_id(&self) -> Result<i32, std::num::ParseIntError> {
        self.opid.trim_start_matches("__").parse()
    }
    pub fn get_form_id(&self) -> Option<i32> {
        if let Some(form_id) = &self.form_opid {
            parse_form_opid(form_id.as_str()).ok()
        } else {
            None
        }
    }
}


fn parse_form_opid(opid: &str) -> Result<i32, std::num::ParseIntError> {
    opid.trim_start_matches("__form__").parse()
}