use pin_project_lite::pin_project; enum Enum<T, U> { Struct { pinned1: T, pinned2: T, unpinned1: U, unpinned2: U }, Unit, } #[doc(hidden)] #[allow( dead_code, single_use_lifetimes, clippy::unknown_clippy_lints, clippy::absolute_paths, clippy::min_ident_chars, clippy::mut_mut, clippy::redundant_pub_crate, clippy::single_char_lifetime_names, clippy::type_repetition_in_bounds )] enum EnumProjReplace<T, U> { Struct { pinned1: ::pin_project_lite::__private::PhantomData<T>, pinned2: ::pin_project_lite::__private::PhantomData<T>, unpinned1: U, unpinned2: U, }, Unit, } #[allow( single_use_lifetimes, clippy::unknown_clippy_lints, clippy::absolute_paths, clippy::min_ident_chars, clippy::single_char_lifetime_names, clippy::used_underscore_binding )] const _: () = { impl<T, U> Enum<T, U> { #[doc(hidden)] #[inline] fn project_replace( self: ::pin_project_lite::__private::Pin<&mut Self>, replacement: Self, ) -> EnumProjReplace<T, U> { unsafe { let __self_ptr: *mut Self = self.get_unchecked_mut(); let __guard = ::pin_project_lite::__private::UnsafeOverwriteGuard::new( __self_ptr, replacement, ); match &mut *__self_ptr { Self::Struct { pinned1, pinned2, unpinned1, unpinned2 } => { let result = EnumProjReplace::Struct { pinned1: ::pin_project_lite::__private::PhantomData, pinned2: ::pin_project_lite::__private::PhantomData, unpinned1: ::pin_project_lite::__private::ptr::read( unpinned1, ), unpinned2: ::pin_project_lite::__private::ptr::read( unpinned2, ), }; { ( ::pin_project_lite::__private::UnsafeDropInPlaceGuard::new( pinned1, ), ::pin_project_lite::__private::UnsafeDropInPlaceGuard::new( pinned2, ), (), (), ); } result } Self::Unit => EnumProjReplace::Unit, } } } } #[allow(non_snake_case)] struct __Origin<'__pin, T, U> { __dummy_lifetime: ::pin_project_lite::__private::PhantomData<&'__pin ()>, Struct: ( T, T, ::pin_project_lite::__private::AlwaysUnpin<U>, ::pin_project_lite::__private::AlwaysUnpin<U>, ), Unit: (), } impl<'__pin, T, U> ::pin_project_lite::__private::Unpin for Enum<T, U> where ::pin_project_lite::__private::PinnedFieldsOf< __Origin<'__pin, T, U>, >: ::pin_project_lite::__private::Unpin, {} trait MustNotImplDrop {} #[allow(clippy::drop_bounds, drop_bounds)] impl<T: ::pin_project_lite::__private::Drop> MustNotImplDrop for T {} impl<T, U> MustNotImplDrop for Enum<T, U> {} }; fn main() {}