Macro literals

macro_rules! literals {
    (
        $(
            $( #[ $attr:meta ] )*
            $vis:vis $name:ident => $($($value:literal)..=+)|+;
        )*
    ) => { ... };
    (
        IMPL
        $( #[ $attr:meta ] )*
        $vis:vis $name:ident => $($($value:literal)..=+)|+
    ) => { ... };
}