Macro ARGONE 

macro_rules! ARGONE {
    (@PassOrB $a:expr, $b:expr) => { ... };
    (@PassOrB , $b:expr) => { ... };
    (@Parse) => { ... };
    (@Parse $file:literal, $($prefix:literal)?, $( ($($config_panic:expr),*) )?) => { ... };
    (@SetConfig $config:expr, $file:literal, ,) => { ... };
    (@SetConfig $config:expr, $file:literal, , ($($config_panic:expr),*)) => { ... };
    (@SetConfig $config:expr, $file:literal, $prefix:literal,) => { ... };
    (@SetConfig $config:expr, $file:literal, $prefix:literal, ($($config_panic:expr),*)) => { ... };
    (@SetConfig @If $conf:expr, $opts:expr, $name:ident,) => { ... };
    (@SetConfig @If $conf:expr, $opts:expr, [Config] $name:ident, $($default:expr)?) => { ... };
    (
        @Args {
            {
                $(#[$meta:meta])*
            }
            $(
                $(#[$f_meta:meta])*
                $([$tt:tt])? $name:ident: $ty:ty$( = $default:expr)?,
            )*
        }
    ) => { ... };
    (
        $(#[$main_meta:meta])*
        $(version = $version:literal $(;)?$(,)?)?
        $(author = $author:literal $(;)?$(,)?)?
        $(about = $about:literal $(;)?$(,)?)?
        $(Config {
            file = $config_file:literal $(;)?$(,)?
            $(prefix = $config_prefix:literal $(;)?$(,)?)?
            $(panic = ($($config_panic:expr),*) $(;)?$(,)?)?
        })?
        Args {
            $(
                $(#[$args_meta:meta])*
                $(($($clap_arg:stmt),*))?
                $([$tt:tt])? $args_name:ident: $args_ty:ty $(= $args_default:expr)? $(;)?$(,)?
            )+
        }
        $(
            $(#[$subcommands_meta:meta])*
            commands = $subcommands:ty $(;)?$(,)?
        )?
    ) => { ... };
}