What is the meaning of this 'box ref foo' syntax found in the tutorial over at
http://doc.rust-lang.org/tutorial.html#references
In short, it's:
enum Shape { Sphere(Box<f32>) }
let shape = Sphere(box 1.0f32);
let r = match shape {
Sphere(box ref radius) => *radius
};
I thought the 'box' keyword meant: "allocate on heap and wrap into a Box". That
doesn't make sense to me in the context of 'box ref radius'.
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