mirror of https://github.com/rust-lang/rust
17 lines
479 B
Rust
17 lines
479 B
Rust
// This is not exactly right, yet.
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// Ideally we should be suggesting `as_mut` for the first case,
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// and suggesting to change `as_ref` to `as_mut` in the second.
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fn x(cb: &mut Option<&mut dyn FnMut()>) {
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cb.map(|cb| cb());
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//~^ ERROR cannot move out of `*cb` which is behind a mutable reference
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}
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fn x2(cb: &mut Option<&mut dyn FnMut()>) {
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cb.as_ref().map(|cb| cb());
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//~^ ERROR cannot borrow `*cb` as mutable, as it is behind a `&` reference
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}
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fn main() {}
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