Method equal_range

src/fl/stl/multi_set.h:315–319

equal_range returns [lower_bound, upper_bound) for the given key

    // equal_range returns [lower_bound, upper_bound) for the given key
    fl::pair<iterator, iterator> equal_range(const Key& key) {
        iterator lower = lower_bound(key);
        iterator upper = upper_bound(key);
        return fl::pair<iterator, iterator>(lower, upper);
    }

    fl::pair<const_iterator, const_iterator> equal_range(const Key& key) const {
        const_iterator lower = lower_bound(key);