use pin_project_lite::pin_project; enum Enum { Struct { pinned: T, unpinned: U }, Unit, } #[allow(dead_code)] #[allow(single_use_lifetimes)] #[allow(clippy::unknown_clippy_lints)] #[allow(clippy::mut_mut)] #[allow(clippy::redundant_pub_crate)] #[allow(clippy::ref_option_ref)] #[allow(clippy::type_repetition_in_bounds)] enum EnumProj<'__pin, T, U> where Enum: '__pin, { Struct { pinned: ::pin_project_lite::__private::Pin<&'__pin mut (T)>, unpinned: &'__pin mut (U), }, Unit, } #[allow(dead_code)] #[allow(single_use_lifetimes)] #[allow(clippy::unknown_clippy_lints)] #[allow(clippy::mut_mut)] #[allow(clippy::redundant_pub_crate)] #[allow(clippy::ref_option_ref)] #[allow(clippy::type_repetition_in_bounds)] enum EnumProjRef<'__pin, T, U> where Enum: '__pin, { Struct { pinned: ::pin_project_lite::__private::Pin<&'__pin (T)>, unpinned: &'__pin (U), }, Unit, } #[allow(dead_code)] #[allow(single_use_lifetimes)] #[allow(clippy::mut_mut)] #[allow(clippy::redundant_pub_crate)] #[allow(clippy::type_repetition_in_bounds)] enum EnumProjReplace { Struct { pinned: ::pin_project_lite::__private::PhantomData, unpinned: U, }, Unit, } #[allow(single_use_lifetimes)] #[allow(clippy::unknown_clippy_lints)] #[allow(clippy::used_underscore_binding)] const _: () = { impl Enum { fn project<'__pin>( self: ::pin_project_lite::__private::Pin<&'__pin mut Self>, ) -> EnumProj<'__pin, T, U> { unsafe { match self.get_unchecked_mut() { Self::Struct { pinned, unpinned } => EnumProj::Struct { pinned: ::pin_project_lite::__private::Pin::new_unchecked(pinned), unpinned: unpinned, }, Self::Unit => EnumProj::Unit, } } } fn project_ref<'__pin>( self: ::pin_project_lite::__private::Pin<&'__pin Self>, ) -> EnumProjRef<'__pin, T, U> { unsafe { match self.get_ref() { Self::Struct { pinned, unpinned } => EnumProjRef::Struct { pinned: ::pin_project_lite::__private::Pin::new_unchecked(pinned), unpinned: unpinned, }, Self::Unit => EnumProjRef::Unit, } } } fn project_replace( self: ::pin_project_lite::__private::Pin<&mut Self>, replacement: Self, ) -> EnumProjReplace { 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 { pinned, unpinned } => { let result = EnumProjReplace::Struct { pinned: ::pin_project_lite::__private::PhantomData, unpinned: ::pin_project_lite::__private::ptr::read(unpinned), }; { ( ::pin_project_lite::__private::UnsafeDropInPlaceGuard::new(pinned), (), ); } result } Self::Unit => EnumProjReplace::Unit, } } } } #[allow(non_snake_case)] struct __Origin<'__pin, T, U> { __dummy_lifetime: ::pin_project_lite::__private::PhantomData<&'__pin ()>, Struct: (T, ::pin_project_lite::__private::AlwaysUnpin), Unit: (), } impl<'__pin, T, U> ::pin_project_lite::__private::Unpin for Enum where __Origin<'__pin, T, U>: ::pin_project_lite::__private::Unpin { } trait MustNotImplDrop {} #[allow(clippy::drop_bounds, drop_bounds)] impl MustNotImplDrop for T {} impl MustNotImplDrop for Enum {} }; fn main() {}