mirror of https://github.com/rust-lang/rust
16 lines
421 B
Rust
16 lines
421 B
Rust
fn main() {
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let mut x: Option<isize> = None;
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match x {
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None => {
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// Note: on this branch, no borrow has occurred.
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x = Some(0);
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}
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Some(ref i) => {
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// But on this branch, `i` is an outstanding borrow
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x = Some(*i+1); //~ ERROR cannot assign to `x` because it is borrowed
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drop(i);
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}
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}
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x.clone(); // just to prevent liveness warnings
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}
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