Trait MultiPolygon 

pub trait MultiPolygon: Geometry<Kind = MultiPolygonTag> {
    type ItemPolygon: Polygon<Point = Self::Point>;

    // Required method
    fn polygons(&self) -> impl ExactSizeIterator<Item = &Self::ItemPolygon>;
}

A multi-polygon — a collection of polygons belonging to each other (e.g. Hawaii).

Mirrors the MultiPolygon concept (doc/concept/multi_polygon.qbk); the canonical model is boost::geometry::model::multi_polygon in boost/geometry/geometries/multi_polygon.hpp, which derives from std::vector<Polygon> and asserts concepts::Polygon<Polygon> on its element type. The Rust port mirrors that assertion by bounding MultiPolygon::ItemPolygon on the Polygon concept, and additionally pins ItemPolygon::Point = Self::Point so the multi’s point_type<MPG> projection stays consistent across the collection.

Examples

use geometry_trait::MultiPolygon;
fn count<M: MultiPolygon>(m: &M) -> usize { m.polygons().len() }

Required Associated Types

type ItemPolygon: Polygon<Point = Self::Point>

The element polygon type.

Mirrors the Polygon template parameter on boost::geometry::model::multi_polygon<Polygon, …> (boost/geometry/geometries/multi_polygon.hpp).

Required Methods

fn polygons(&self) -> impl ExactSizeIterator<Item = &Self::ItemPolygon>

The polygons of this multi-polygon, in declared order.

Plays the role of boost::begin(mpg) / boost::end(mpg) from boost/geometry/geometries/multi_polygon.hpp when read together.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors