34 lines
516 B
Rust
34 lines
516 B
Rust
// run-pass
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#![feature(specialization)] //~ WARN the feature `specialization` is incomplete
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trait Iterator {
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fn next(&self);
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}
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trait WithAssoc {
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type Item;
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}
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impl<'a> WithAssoc for &'a () {
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type Item = &'a u32;
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}
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struct Cloned<I>(#[allow(dead_code)] I);
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impl<'a, I, T: 'a> Iterator for Cloned<I>
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where I: WithAssoc<Item=&'a T>, T: Clone
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{
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fn next(&self) {}
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}
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impl<'a, I, T: 'a> Iterator for Cloned<I>
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where I: WithAssoc<Item=&'a T>, T: Copy
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{
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}
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fn main() {
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Cloned(&()).next();
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}
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