23 lines
446 B
Rust
23 lines
446 B
Rust
#![allow(dead_code)]
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use std::cell::Cell;
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#[derive(Copy, Clone)]
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struct Point {x: isize, y: isize, z: isize}
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fn f(p: &Cell<Point>) {
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assert_eq!(p.get().z, 12);
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p.set(Point {x: 10, y: 11, z: 13});
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assert_eq!(p.get().z, 13);
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}
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pub fn main() {
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let a: Point = Point {x: 10, y: 11, z: 12};
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let b: &Cell<Point> = &Cell::new(a);
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assert_eq!(b.get().z, 12);
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f(b);
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assert_eq!(a.z, 12);
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assert_eq!(b.get().z, 13);
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}
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