36 lines
572 B
Rust
36 lines
572 B
Rust
//@ run-pass
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struct X {
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a: isize
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}
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trait Changer : Sized {
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fn change(mut self) -> Self {
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self.set_to(55);
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self
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}
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fn change_again(mut self: Box<Self>) -> Box<Self> {
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self.set_to(45);
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self
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}
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fn set_to(&mut self, a: isize);
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}
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impl Changer for X {
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fn set_to(&mut self, a: isize) {
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self.a = a;
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}
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}
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pub fn main() {
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let x = X { a: 32 };
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let new_x = x.change();
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assert_eq!(new_x.a, 55);
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let x: Box<_> = Box::new(new_x);
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let new_x = x.change_again();
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assert_eq!(new_x.a, 45);
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}
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