mirror of https://github.com/rust-lang/rust
46 lines
1008 B
Rust
46 lines
1008 B
Rust
//@ run-rustfix
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trait Greeter0 {
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fn greet(&self);
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}
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trait Greeter1 {
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fn greet(&self);
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}
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type BoxedGreeter<'a> = (Box<dyn Greeter0 + 'a>, Box<dyn Greeter1 + 'a>);
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//~^ HELP to declare that the trait object captures data from argument `self`, you can add a lifetime parameter `'a` in the type alias
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struct FixedGreeter<'a>(pub &'a str);
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impl Greeter0 for FixedGreeter<'_> {
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fn greet(&self) {
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println!("0 {}", self.0)
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}
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}
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impl Greeter1 for FixedGreeter<'_> {
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fn greet(&self) {
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println!("1 {}", self.0)
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}
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}
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struct Greetings(pub Vec<String>);
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impl Greetings {
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pub fn get(&self, i: usize) -> BoxedGreeter {
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(Box::new(FixedGreeter(&self.0[i])), Box::new(FixedGreeter(&self.0[i])))
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//~^ ERROR lifetime may not live long enough
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}
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}
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fn main() {
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let mut g = Greetings {0 : vec!()};
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g.0.push("a".to_string());
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g.0.push("b".to_string());
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g.get(0).0.greet();
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g.get(0).1.greet();
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g.get(1).0.greet();
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g.get(1).1.greet();
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}
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