mut-vec-iter.rs

extern crate core;

struct Point {
	t: f32,
	l: f32,
}

impl core::fmt::Show for Point {
    fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
		write!(f, "Point(left={}, top={})", self.l, self.t)
	}
}

pub fn main() {
	// Create points
	let mut points: Vec<Point> = Vec::new();
	points.push(Point{t: 10f32, l: 10f32});
	println!("points: {}", points);

	// Mutate points
	for &mut point in points.iter() {
		point.t += 10f32;
	}
	println!("points: {}", points);
}

// Actual output:
//   points: [Point(left=10, top=10)]
//   points: [Point(left=10, top=10)]
//
// Expected output:
//   points: [Point(left=10, top=10)]
//   points: [Point(left=10, top=20)] <- difference is here