Macro required_field 

macro_rules! required_field {
    ($field:expr, $error:expr) => { ... };
}

Extracts and validates a required Option<T> field.

This macro simplifies the common pattern of extracting a required field from an Option, returning an error if the field is None.

Arguments

• $field - The Option<T> field to extract
• $error - The error to return if the field is None

Examples

fn extract_fields(self) -> Result<(u32, String)> {
    let id = required_field!(self.id, Error::message(Error::MESSAGE_ID_REQUIRED))?;
    let name = required_field!(self.name, Error::message(Error::MESSAGE_NAME_EMPTY))?;
    Ok((id, name))
}