1 files changed, 86 insertions, 0 deletions
diff --git a/third_party/rust/pin-project/examples/enum-default-expanded.rs b/third_party/rust/pin-project/examples/enum-default-expanded.rs
new file mode 100644
index 0000000000..568f9b2c23
--- /dev/null
+++ b/third_party/rust/pin-project/examples/enum-default-expanded.rs
@@ -0,0 +1,86 @@
+// Original code (./enum-default.rs):
+//
+// ```rust
+// #![allow(dead_code)]
+//
+// use pin_project::pin_project;
+//
+// #[pin_project]
+// enum Enum<T, U> {
+//     Pinned(#[pin] T),
+//     Unpinned(U),
+// }
+//
+// fn main() {}
+// ```
+
+#![allow(dead_code, unused_imports, unused_parens)]
+
+use pin_project::pin_project;
+
+enum Enum<T, U> {
+    Pinned(/* #[pin] */ T),
+    Unpinned(U),
+}
+
+#[allow(clippy::mut_mut)] // This lint warns `&mut &mut <ty>`.
+#[allow(dead_code)] // This lint warns unused fields/variants.
+enum __EnumProjection<'pin, T, U> {
+    Pinned(::core::pin::Pin<&'pin mut (T)>),
+    Unpinned(&'pin mut (U)),
+}
+
+#[allow(dead_code)] // This lint warns unused fields/variants.
+enum __EnumProjectionRef<'pin, T, U> {
+    Pinned(::core::pin::Pin<&'pin (T)>),
+    Unpinned(&'pin (U)),
+}
+
+impl<T, U> Enum<T, U> {
+    fn project<'pin>(self: ::core::pin::Pin<&'pin mut Self>) -> __EnumProjection<'pin, T, U> {
+        unsafe {
+            match self.get_unchecked_mut() {
+                Enum::Pinned(_0) => __EnumProjection::Pinned(::core::pin::Pin::new_unchecked(_0)),
+                Enum::Unpinned(_0) => __EnumProjection::Unpinned(_0),
+            }
+        }
+    }
+    fn project_ref<'pin>(self: ::core::pin::Pin<&'pin Self>) -> __EnumProjectionRef<'pin, T, U> {
+        unsafe {
+            match self.get_ref() {
+                Enum::Pinned(_0) => {
+                    __EnumProjectionRef::Pinned(::core::pin::Pin::new_unchecked(_0))
+                }
+                Enum::Unpinned(_0) => __EnumProjectionRef::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.
+#[allow(non_snake_case)]
+fn __unpin_scope_Enum() {
+    struct __Enum<'pin, T, U> {
+        __pin_project_use_generics: ::pin_project::__private::AlwaysUnpin<'pin, (T, U)>,
+        __field0: T,
+    }
+    impl<'pin, T, U> ::core::marker::Unpin for Enum<T, U> where __Enum<'pin, T, U>: ::core::marker::Unpin
+    {}
+}
+
+// Ensure that enum does not implement `Drop`.
+//
+// See ./struct-default-expanded.rs for details.
+trait EnumMustNotImplDrop {}
+#[allow(clippy::drop_bounds)]
+impl<T: ::core::ops::Drop> EnumMustNotImplDrop for T {}
+#[allow(single_use_lifetimes)]
+impl<T, U> EnumMustNotImplDrop for Enum<T, U> {}
+
+// We don't need to check for '#[repr(packed)]',
+// since it does not apply to enums.
+
+fn main() {}