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31 lines
545 B
Rust
31 lines
545 B
Rust
use std::fmt;
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struct Number {
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n: i64
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}
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impl fmt::Display for Number {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "{}", self.n)
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}
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}
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struct List {
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list: Vec<Box<dyn ToString + 'static>> }
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impl List {
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fn push(&mut self, n: Box<dyn ToString + 'static>) {
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self.list.push(n);
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}
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}
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fn main() {
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let n: Box<_> = Number { n: 42 }.into();
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let mut l: Box<_> = List { list: Vec::new() }.into();
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l.push(n);
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let x = n.to_string();
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//~^ ERROR: borrow of moved value: `n`
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}
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