Macro cucumber_rust::cucumber

macro_rules! cucumber {
    (
        features: $featurepath:tt;
        world: $worldtype:path;
        steps: $vec:expr;
        before: $beforefn:expr
    ) => { ... };
    (
        features: $featurepath:tt;
        world: $worldtype:path;
        steps: $vec:expr
    ) => { ... };
    (
        @finish; $featurepath:tt; $worldtype:path; $vec:expr; $beforefn:expr
    ) => { ... };
}