mirror of https://github.com/rust-lang/rust
29 lines
702 B
Rust
29 lines
702 B
Rust
use std::marker::PhantomData;
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struct Example<E, FakeParam>(PhantomData<(fn(E), fn(FakeParam))>);
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struct NoLifetime;
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struct Immutable<'a>(PhantomData<&'a ()>);
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impl<'a, E: 'a> Copy for Example<E, Immutable<'a>> {}
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impl<'a, E: 'a> Clone for Example<E, Immutable<'a>> {
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fn clone(&self) -> Self {
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*self
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}
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}
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impl<E, FakeParam> Example<E, FakeParam> {
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unsafe fn change<NewFakeParam>(self) -> Example<E, NewFakeParam> {
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Example(PhantomData)
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}
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}
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impl<E> Example<E, NoLifetime> {
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fn the_ice(&mut self) -> Example<E, Immutable<'_>> {
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unsafe { self.change() }
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//~^ ERROR cannot move out of `*self` which is behind a mutable reference
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}
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}
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fn main() {}
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