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: main.rs
    path of file: ./repos/windows-rs/crates/tools/riddle/src
    
    the code of the file until where you have to start completion: fn main() {
    let args: Vec<String> = std::env::args().skip(1).collect();

    if args.is_empty() {
        println!(
            r#"Usage: riddle.exe [options...]

    
fn main() {
    let args: Vec<String> = std::env::args().skip(1).collect();

    if args.is_empty() {
        println!(
            r#"Usage: riddle.exe [options...]

Options:
  --in  <path>          Path to files and directories containing .winmd and .rdl files
  --out <path>          Path to .winmd, .rdl, or .rs file to generate
  --filter <namespace>  Namespaces to include or !exclude in output
  --config <key=value>  Override a configuration value
  --format              Format .rdl files only
  --etc <path>          File containing command line options
"#
        );
    } else {
        match windows_bindgen::bindgen(args) {
            Ok(ok) => println!("{ok}"),
            Err(error) => {
                eprintln!("{error}");
                std::process::exit(1);
            }
        }
    }
}