fn from()

in src/builder.rs [111:135]

• 21 lines of code
• 7 McCabe index (conditional complexity)

    fn from(mut builder: RibbonBuilder<'a, W, T>) -> ExactRibbon<W, T> {
        assert!(builder.universe_size == 0 || builder.universe_size == builder.items.len());
        if let Some(filter) = builder.filter {
            if filter.block_is_empty(&builder.id) {
                // The approximate filter is empty, so it gives a definitive result on every
                // item and there's nothing to encode in the exact filter.
                return ExactRibbon::new(&builder.id, 0, filter.block_is_inverted(&builder.id));
            }
        }
        let mut out = ExactRibbon::new(&builder.id, builder.items.len(), builder.inverted);
        // By inserting the included items first, we ensure that any exceptions that occur during
        // insertion are for excluded items.
        let mut excluded = vec![];
        for item in builder.items.drain(..) {
            if item.included() {
                out.insert(item);
            } else {
                excluded.push(item);
            }
        }
        for item in excluded.drain(..) {
            out.insert(item);
        }
        out
    }