You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: shorthand_or_long_field.rs
    path of file: ./repos/darling/examples
    
    the code of the file until where you have to start completion: //! Example showing potentially-nested meta item parsing with `darling::util::Override`.
//!
//! Based on https://stackoverflow.com/q/68046070/86381 by https://github.com/peterjoel

// The use of fields in debug print commands does not count as "used",
// which causes the fields to trigger
    
fn main() {
    let missing = from_str(
        r#"
        #[derive(MyTrait)]
        struct Foo(u64);
    "#,
    )
    .unwrap_err();

    let short_form = from_str(
        r#"
        #[derive(MyTrait)]
        #[myderive(table)]
        struct Foo(u64);
    "#,
    )
    .unwrap();

    let long_form = from_str(
        r#"
        #[derive(MyTrait)]
        #[myderive(table(name = "Custom"))]
        struct Foo(u64);
    "#,
    )
    .unwrap();

    println!("Error when missing: {}", missing);
    println!("Short form: {:?}", short_form.table());
    println!("Long form: {:?}", long_form.table());
}