54 lines
1.7 KiB
Rust
54 lines
1.7 KiB
Rust
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#![feature(dropck_eyepatch)]
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struct Implee1<'a, T, const N: usize>(&'a T);
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struct Implee2<'a, T, const N: usize>(&'a T);
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struct Implee3<'a, T, const N: usize>(&'a T);
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trait NotDrop {}
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unsafe impl<#[may_dangle] 'a, T, const N: usize> NotDrop for Implee1<'a, T, N> {}
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//~^ ERROR must be applied to a lifetime or type generic parameter in `Drop` impl
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unsafe impl<'a, #[may_dangle] T, const N: usize> NotDrop for Implee2<'a, T, N> {}
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//~^ ERROR must be applied to a lifetime or type generic parameter in `Drop` impl
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unsafe impl<'a, T, #[may_dangle] const N: usize> Drop for Implee1<'a, T, N> {
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//~^ ERROR must be applied to a lifetime or type generic parameter in `Drop` impl
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fn drop(&mut self) {}
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}
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// Ok, lifetime param in a `Drop` impl.
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unsafe impl<#[may_dangle] 'a, T, const N: usize> Drop for Implee2<'a, T, N> {
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fn drop(&mut self) {}
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}
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// Ok, type param in a `Drop` impl.
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unsafe impl<'a, #[may_dangle] T, const N: usize> Drop for Implee3<'a, T, N> {
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fn drop(&mut self) {}
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}
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// Check that this check is not textual.
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mod fake {
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trait Drop {
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fn drop(&mut self);
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}
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struct Implee<T>(T);
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unsafe impl<#[may_dangle] T> Drop for Implee<T> {
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//~^ ERROR must be applied to a lifetime or type generic parameter in `Drop` impl
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fn drop(&mut self) {}
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}
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}
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#[may_dangle] //~ ERROR must be applied to a lifetime or type generic parameter in `Drop` impl
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struct Dangling;
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#[may_dangle] //~ ERROR must be applied to a lifetime or type generic parameter in `Drop` impl
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impl NotDrop for () {
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}
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#[may_dangle] //~ ERROR must be applied to a lifetime or type generic parameter in `Drop` impl
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fn main() {
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#[may_dangle] //~ ERROR must be applied to a lifetime or type generic parameter in `Drop` impl
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let () = ();
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}
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