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33 lines
712 B
Rust
33 lines
712 B
Rust
//@ run-pass
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pub trait Clone2 {
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/// Returns a copy of the value. The contents of boxes
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/// are copied to maintain uniqueness, while the contents of
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/// managed pointers are not copied.
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fn clone(&self) -> Self;
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}
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trait Getter<T: Clone> {
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fn do_get(&self) -> T;
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fn do_get2(&self) -> (T, T) {
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let x = self.do_get();
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(x.clone(), x.clone())
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}
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}
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impl Getter<isize> for isize {
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fn do_get(&self) -> isize { *self }
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}
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impl<T: Clone> Getter<T> for Option<T> {
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fn do_get(&self) -> T { self.as_ref().unwrap().clone() }
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}
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pub fn main() {
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assert_eq!(3.do_get2(), (3, 3));
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assert_eq!(Some("hi".to_string()).do_get2(), ("hi".to_string(), "hi".to_string()));
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}
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