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23 lines
446 B
Rust
23 lines
446 B
Rust
union Test {
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a: A, //~ ERROR field must implement `Copy` or be wrapped in `ManuallyDrop<...>` to be used in a union
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b: B
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}
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#[derive(Debug)]
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struct A(i32);
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impl Drop for A {
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fn drop(&mut self) { println!("A"); }
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}
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#[derive(Debug)]
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struct B(f32);
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impl Drop for B {
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fn drop(&mut self) { println!("B"); }
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}
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fn main() {
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let mut test = Test { a: A(3) };
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println!("{:?}", unsafe { test.b });
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unsafe { test.b = B(0.5); }
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}
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