mirror of https://github.com/rust-lang/rust
22 lines
485 B
Rust
22 lines
485 B
Rust
//@ run-pass
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//@ pretty-expanded FIXME #23616
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#![allow(unused_variables)]
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trait Bar {
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fn noop(&self); //~ WARN method `noop` is never used
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}
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impl Bar for u8 {
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fn noop(&self) {}
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}
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fn main() {
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let (a, b) = (&5u8 as &dyn Bar, &9u8 as &dyn Bar);
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let (c, d): (&dyn Bar, &dyn Bar) = (a, b);
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let (a, b) = (Box::new(5u8) as Box<dyn Bar>, Box::new(9u8) as Box<dyn Bar>);
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let (c, d): (&dyn Bar, &dyn Bar) = (&*a, &*b);
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let (c, d): (&dyn Bar, &dyn Bar) = (&5, &9);
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}
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