Macro register_linestring 

macro_rules! register_linestring {
    ($Ty:ty, $Point:ty, |$s:ident| $iter:expr) => { ... };
}

Register a user-owned linestring type whose storage is iterable as &Point via a user-supplied expression.

Emits impl Geometry for $Ty with Kind = LinestringTag and Point = $Point, plus impl Linestring for $Ty whose points() returns the iterator the closure-shaped argument produces.

Mirrors BOOST_GEOMETRY_REGISTER_LINESTRING from boost/geometry/geometries/register/linestring.hpp. The Boost macro only has to specialise traits::tag<G> because the rest of the linestring concept rides on boost::range for free; the Rust counterpart has to spell the iterator out, which is why the macro takes a closure-shaped expression for the iteration.

The iterator expression must yield an ExactSizeIterator<Item = &$Point> + Clone — the same bound geometry_trait::Linestring::points requires. For the common case of a Vec<$Point> field, |s| s.field.iter() is the right shape.

Example

use geometry_adapt::register_linestring;
use geometry_cs::Cartesian;
use geometry_model::Point2D;
use geometry_trait::Linestring;

struct MyLineString { points: Vec<Point2D<f64, Cartesian>> }

register_linestring!(MyLineString, Point2D<f64, Cartesian>, |s| s.points.iter());

let ls = MyLineString {
    points: vec![Point2D::new(0.0, 0.0), Point2D::new(1.0, 1.0)],
};
assert_eq!(ls.points().count(), 2);