Macro spi_dispatch_function

macro_rules! spi_dispatch_function {
    (
        $service:ident,
        $funs:ident, $ctx:ident, $inst:ident,
        @dispatch: {
            $(
                $(#[$attr:meta])*
                $code:pat=>$mod:path,
            )*
        },
        @args: $args: tt
    ) => { ... };
}