mirror of https://github.com/rust-lang/rust
23 lines
331 B
Rust
23 lines
331 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 {
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fn change(self: Box<Self>) -> Box<Self>;
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}
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impl Changer for X {
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fn change(mut self: Box<X>) -> Box<X> {
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self.a = 55;
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self
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}
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}
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pub fn main() {
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let x: Box<_> = Box::new(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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}
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