Macro helix::codegen_pub_classes

macro_rules! codegen_pub_classes {
    {
            $({
                type: class,
                rust_name: $rust_name:tt,
                ruby_name: $ruby_name:tt,
                meta: { pub: $pub:tt, reopen: $reopen:tt },
                struct: $struct:tt,
                methods: [ $($method:tt)* ]
            })*
    } => { ... };
    {
        type: class,
        rust_name: $rust_name:tt,
        ruby_name: $ruby_name:tt,
        pub: false
    } => { ... };
    {
        type: class,
        rust_name: $rust_name:tt,
        ruby_name: $ruby_name:tt,
        pub: true
    } => { ... };
}