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25 lines
629 B
Rust
25 lines
629 B
Rust
// options3.rs
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//
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// Execute `rustlings hint options3` or use the `hint` watch subcommand for a
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// hint.
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// I can use the Copy (and clone) typeclasses
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//#[derive(Clone, Copy)]
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struct Point {
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x: i32,
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y: i32,
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}
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fn main() {
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// if I use the typeclasses this stay clean
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//let y: Option<Point> = Some(Point { x: 100, y: 200 });
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// or I can use the reference in the pattern, adding the &
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let y: Option<&Point> = Some(&Point { x: 100, y: 200 });
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match y {
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Some(p) => println!("Co-ordinates are {},{} ", p.x, p.y),
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_ => panic!("no match!"),
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}
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y; // Fix without deleting this line.
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}
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