How to iterate over fields of struct

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5

One way to do this is by defining a new struct that holds a reference to the Vector3D, and a counter, and to implement Iterator on that new struct. You can get this struct by calling .iter() on the Vector3D:

fn main() {
    let vec3 = Vector3D {
        x: 3.0,
        y: 7.0,
        z: 22.0,
    };
    for a in vec3.iter() {
        dbg!(a);
    }
}

[src/main.rs:8] a = 3.0
[src/main.rs:8] a = 7.0
[src/main.rs:8] a = 22.0

See the implementation details here: Rust Playground

Personally, I'd prefer converting the Vector3D into an array and iterating over the array like RustyYato suggested. It's simpler and less code to write.

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