Macro make_code_point_set_property

macro_rules! make_code_point_set_property {
    (
        // currently unused
        property: $property:expr;
        // currently unused
        marker: $marker_name:ident;
        keyed_data_marker: $keyed_data_marker:ty;
        func:
        $(#[$doc:meta])+
        $cvis:vis const fn $constname:ident() => $singleton_name:ident;
        $vis:vis fn $funcname:ident();
    ) => { ... };
}