Macro proc_easy::easy_argument_group

macro_rules! easy_argument_group {
    (
        $(#[$meta:meta])*
        $vis:vis enum $name:ident {
            $( $(#[$vmeta:meta])* $vname:ident ( $(#[$vtmeta:meta])* $vtype:ty ) ),*
            $(,)?
        }
    ) => { ... };
}

Defines argument group as enum where each variant is argument type.