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use magnus::{function, method, prelude::*, wrap};
#[wrap(class = "Point")]
struct Point {
x: isize,
y: isize,
}
impl Point {
fn new(x: isize, y: isize) -> Self {
Self { x, y }
}
fn x(&self) -> isize {
self.x
}
fn y(&self) -> isize {
self.y
}
fn distance(&self, other: &Point) -> f64 {
(((other.x - self.x).pow(2) + (other.y - self.y).pow(2)) as f64).sqrt()
}
}
fn main() -> Result<(), String> {
magnus::Ruby::init(|ruby| {
let class = ruby.define_class("Point", ruby.class_object())?;
class.define_singleton_method("new", function!(Point::new, 2))?;
class.define_method("x", method!(Point::x, 0))?;
class.define_method("y", method!(Point::y, 0))?;
class.define_method("distance", method!(Point::distance, 1))?;
let d: f64 = ruby.eval(
"a = Point.new(0, 0)
b = Point.new(5, 10)
a.distance(b)",
)?;
println!("{}", d);
Ok(())
})
}
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