[feature wanted] can i use validate_type macro in my project

[honwhy]

can i use validate_type macro in my project
valid_types!(ValidRectType: u32);

[twistedfall]

Well, theoretically there shouldn't be anything preventing you from using any type with Rect_ I just wanted to be on the safe side. Can you still please tell me why you need it?

[honwhy]

as we use coordinate x and y, (0,0) starts from left-top, maybe it is more precisely using usize type.
I am doing some kind of exercise, code
follow the example, which using photon-rs to do image crop,

impl SpecTransform<&Crop> for Photon {
    fn transform(&mut self, op: &Crop) {
        let img = transform::crop(&mut self.0, op.x1, op.y1, op.x2, op.y2);
        self.0 = img;
    }
}

while I try to implement crop with opencv-rs, I have to type casting

impl SpecTransform<&Crop> for Opencv {
    fn transform(&mut self, op: &Crop) {
        let rect = Rect_::from_points(
            Point_::<i32>::new(op.x1 as i32, op.y1 as i32),
            Point_::<i32>::new(op.x2 as i32, op.y2 as i32),
        );
        let dest = Mat::roi(&self.0, rect).unwrap();
        self.0 = dest;
    }
}

[twistedfall]

It should be fixed on 0.63.0, Rect_, Point_, Size_, Point3_, VecN no longer impose restrictions on its container types.