mirror of https://github.com/rust-lang/rust.git
28 lines
510 B
Rust
28 lines
510 B
Rust
//@ run-pass
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//@ check-run-results
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#![feature(dyn_star)]
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//~^ WARN the feature `dyn_star` is incomplete and may not be safe to use and/or cause compiler crashes
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trait AddOne {
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fn add1(&mut self) -> usize;
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}
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impl AddOne for usize {
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fn add1(&mut self) -> usize {
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*self += 1;
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*self
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}
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}
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fn add_one(i: &mut (dyn* AddOne + '_)) -> usize {
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i.add1()
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}
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fn main() {
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let mut x = 42usize as dyn* AddOne;
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println!("{}", add_one(&mut x));
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println!("{}", add_one(&mut x));
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}
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