Macro webserver_rs::router

macro_rules! router {
    ([$($method:ident),+] => $($m:ident)::* $(<**$rest:ident>)?) => { ... };
    ([$($method:ident),+] => $(/)? $($prefix:ident)/+ @ $($m:ident)::* $(/<**$rest:ident>)?) => { ... };
    (IN $e:expr, $m:path , $($method:ident),+) => { ... };
}