Attribute Macro command 

#[command]

Attribute macro for function-first command definitions.

The annotated function parameters must use click parameter attributes such as #[option(...)] or #[argument(...)]. The macro generates:

• a hidden derive-backed struct that carries the parameter metadata
• a <function_name>_command() helper that builds a click::Command

Example

#[click::command(name = "hello")]
fn hello(#[argument] name: String, #[option(short, long)] loud: bool) -> click::Result<()> {
    if loud { println!("HELLO, {}!", name); } else { println!("Hello, {}!", name); }
    Ok(())
}

let cmd = hello_command();