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// Original code (./enum-default.rs):
//
// ```rust
// #![allow(dead_code)]
//
// use pin_project::pin_project;
//
// #[pin_project(project = EnumProj)]
// enum Enum<T, U> {
// Pinned(#[pin] T),
// Unpinned(U),
// }
//
// fn main() {}
// ```
#![allow(dead_code, unused_imports, unused_parens, unknown_lints, renamed_and_removed_lints)]
#![allow(clippy::needless_lifetimes, clippy::just_underscores_and_digits)]
use pin_project::pin_project;
// #[pin_project(project = EnumProj)]
enum Enum<T, U> {
Pinned(/* #[pin] */ T),
Unpinned(U),
}
enum EnumProj<'pin, T, U>
where
Enum<T, U>: 'pin,
{
Pinned(::pin_project::__private::Pin<&'pin mut (T)>),
Unpinned(&'pin mut (U)),
}
const _: () = {
// When `#[pin_project]` is used on enums, only named projection types and
// methods are generated because there is no way to access variants of
// projected types without naming it.
// (When `#[pin_project]` is used on structs, both methods are always generated.)
impl<T, U> Enum<T, U> {
fn project<'pin>(
self: ::pin_project::__private::Pin<&'pin mut Self>,
) -> EnumProj<'pin, T, U> {
unsafe {
match self.get_unchecked_mut() {
Self::Pinned(_0) => {
EnumProj::Pinned(::pin_project::__private::Pin::new_unchecked(_0))
}
Self::Unpinned(_0) => EnumProj::Unpinned(_0),
}
}
}
}
// Automatically create the appropriate conditional `Unpin` implementation.
//
// See ./struct-default-expanded.rs and https://github.com/taiki-e/pin-project/pull/53.
// for details.
struct __Enum<'pin, T, U> {
__pin_project_use_generics: ::pin_project::__private::AlwaysUnpin<
'pin,
(::pin_project::__private::PhantomData<T>, ::pin_project::__private::PhantomData<U>),
>,
__field0: T,
}
impl<'pin, T, U> ::pin_project::__private::Unpin for Enum<T, U> where
__Enum<'pin, T, U>: ::pin_project::__private::Unpin
{
}
// A dummy impl of `UnsafeUnpin`, to ensure that the user cannot implement it.
#[doc(hidden)]
unsafe impl<'pin, T, U> ::pin_project::UnsafeUnpin for Enum<T, U> where
__Enum<'pin, T, U>: ::pin_project::__private::Unpin
{
}
// Ensure that enum does not implement `Drop`.
//
// See ./struct-default-expanded.rs for details.
trait EnumMustNotImplDrop {}
#[allow(clippy::drop_bounds, drop_bounds)]
impl<T: ::pin_project::__private::Drop> EnumMustNotImplDrop for T {}
impl<T, U> EnumMustNotImplDrop for Enum<T, U> {}
// A dummy impl of `PinnedDrop`, to ensure that users don't accidentally
// write a non-functional `PinnedDrop` impls.
#[doc(hidden)]
impl<T, U> ::pin_project::__private::PinnedDrop for Enum<T, U> {
unsafe fn drop(self: ::pin_project::__private::Pin<&mut Self>) {}
}
// We don't need to check for `#[repr(packed)]`,
// since it does not apply to enums.
};
fn main() {}
|
