Macro enso_shapely::define_singleton_enum

macro_rules! define_singleton_enum {
    (
        $(#$meta:tt)*
        $name:ident {
            $( $(#$field_meta:tt)* $field:ident ),* $(,)?
        }
    ) => { ... };
}

Defines singletons and an associated enum type. It expands to the same as define_singletons and define_singleton_enum_from.