Macro lut::merge_tables

macro_rules! merge_tables {
    (
        $(#[$attr:meta])*
        pub struct $name:ident {
            static $_f:ident: [$tp:ty;$size:tt]
            = $first:ty { $($flag:ty),* }
            $(
                + $next:ty { $($nflag:ty),* }
            )*;
        }
    ) => { ... };
    (
        $(#[$attr:meta])*
        pub($($vis:tt)+) struct $name:ident {
            static $_f:ident: [$tp:ty;$size:tt]
            = $first:ty { $($flag:ty),* }
            $(
                + $next:ty { $($nflag:ty),* }
            )*;
        }
    ) => { ... };
    (
        $(#[$attr:meta])*
        struct $name:ident {
            static $_f:ident: [$tp:ty;$size:tt]
            = $first:ty { $($flag:ty),* }
            $(
                + $next:ty { $($nflag:ty),* }
            )*;
        }
    ) => { ... };
}

Example