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36 lines
524 B
Rust
36 lines
524 B
Rust
// run-pass
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#![allow(dead_code)]
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#![allow(unused_mut)]
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#![allow(unused_variables)]
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use std::io::{self, Write};
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trait Trait {
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fn f(&self);
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}
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#[derive(Copy, Clone)]
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struct Struct {
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x: isize,
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y: isize,
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}
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impl Trait for Struct {
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fn f(&self) {
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println!("Hi!");
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}
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}
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fn foo(mut a: Box<dyn Write>) {}
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pub fn main() {
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let a = Struct { x: 1, y: 2 };
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let b: Box<dyn Trait> = Box::new(a);
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b.f();
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let c: &dyn Trait = &a;
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c.f();
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let out = io::stdout();
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foo(Box::new(out));
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}
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