Function add_to_config

vmm/src/config.rs:423–429

(items: &mut Option<Vec<T>>, item: T)

type ValidationResult<T> = std::result::Result<T, ValidationError>;

pub fn add_to_config<T>(items: &mut Option<Vec<T>>, item: T) {
    if let Some(items) = items {
        items.push(item);
    } else {
        *items = Some(vec![item]);
    }
}

/// Check that the PCI device supplied is neither out of range nor does
/// it use any reserved device ID.