Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

72 files changed, 4861 insertions, 0 deletions

diff --git a/third_party/rust/pin-project/tests/expand/default/enum.expanded.rs b/third_party/rust/pin-project/tests/expand/default/enum.expanded.rs
new file mode 100644
index 0000000000..490bf2e453
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/default/enum.expanded.rs
@@ -0,0 +1,145 @@
+use pin_project::pin_project;
+#[pin(__private(project = EnumProj, project_ref = EnumProjRef))]
+enum Enum<T, U> {
+    Struct { #[pin] pinned: T, unpinned: U },
+    Tuple(#[pin] T, U),
+    Unit,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(dead_code)]
+#[allow(clippy::mut_mut)]
+enum EnumProj<'pin, T, U>
+where
+    Enum<T, U>: 'pin,
+{
+    Struct {
+        pinned: ::pin_project::__private::Pin<&'pin mut (T)>,
+        unpinned: &'pin mut (U),
+    },
+    Tuple(::pin_project::__private::Pin<&'pin mut (T)>, &'pin mut (U)),
+    Unit,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(dead_code)]
+#[allow(clippy::ref_option_ref)]
+enum EnumProjRef<'pin, T, U>
+where
+    Enum<T, U>: 'pin,
+{
+    Struct { pinned: ::pin_project::__private::Pin<&'pin (T)>, unpinned: &'pin (U) },
+    Tuple(::pin_project::__private::Pin<&'pin (T)>, &'pin (U)),
+    Unit,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    impl<T, U> Enum<T, U> {
+        #[allow(dead_code)]
+        fn project<'pin>(
+            self: _pin_project::__private::Pin<&'pin mut Self>,
+        ) -> EnumProj<'pin, T, U> {
+            unsafe {
+                match self.get_unchecked_mut() {
+                    Self::Struct { pinned, unpinned } => {
+                        EnumProj::Struct {
+                            pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                            unpinned,
+                        }
+                    }
+                    Self::Tuple(_0, _1) => {
+                        EnumProj::Tuple(
+                            _pin_project::__private::Pin::new_unchecked(_0),
+                            _1,
+                        )
+                    }
+                    Self::Unit => EnumProj::Unit,
+                }
+            }
+        }
+        #[allow(dead_code)]
+        #[allow(clippy::missing_const_for_fn)]
+        fn project_ref<'pin>(
+            self: _pin_project::__private::Pin<&'pin Self>,
+        ) -> EnumProjRef<'pin, T, U> {
+            unsafe {
+                match self.get_ref() {
+                    Self::Struct { pinned, unpinned } => {
+                        EnumProjRef::Struct {
+                            pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                            unpinned,
+                        }
+                    }
+                    Self::Tuple(_0, _1) => {
+                        EnumProjRef::Tuple(
+                            _pin_project::__private::Pin::new_unchecked(_0),
+                            _1,
+                        )
+                    }
+                    Self::Unit => EnumProjRef::Unit,
+                }
+            }
+        }
+    }
+    #[allow(missing_debug_implementations)]
+    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,
+        __field1: T,
+    }
+    impl<'pin, T, U> _pin_project::__private::Unpin for Enum<T, U>
+    where
+        __Enum<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for Enum<T, U>
+    where
+        __Enum<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    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> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for Enum<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/default/enum.rs b/third_party/rust/pin-project/tests/expand/default/enum.rs
new file mode 100644
index 0000000000..ff056150ad
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/default/enum.rs
@@ -0,0 +1,14 @@
+use pin_project::pin_project;
+
+#[pin_project(project = EnumProj, project_ref = EnumProjRef)]
+enum Enum<T, U> {
+    Struct {
+        #[pin]
+        pinned: T,
+        unpinned: U,
+    },
+    Tuple(#[pin] T, U),
+    Unit,
+}
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/default/struct.expanded.rs b/third_party/rust/pin-project/tests/expand/default/struct.expanded.rs
new file mode 100644
index 0000000000..0005d863c4
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/default/struct.expanded.rs
@@ -0,0 +1,104 @@
+use pin_project::pin_project;
+#[pin(__private())]
+struct Struct<T, U> {
+    #[pin]
+    pinned: T,
+    unpinned: U,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    #[allow(dead_code)]
+    #[allow(clippy::mut_mut)]
+    struct __StructProjection<'pin, T, U>
+    where
+        Struct<T, U>: 'pin,
+    {
+        pinned: ::pin_project::__private::Pin<&'pin mut (T)>,
+        unpinned: &'pin mut (U),
+    }
+    #[allow(dead_code)]
+    #[allow(clippy::ref_option_ref)]
+    struct __StructProjectionRef<'pin, T, U>
+    where
+        Struct<T, U>: 'pin,
+    {
+        pinned: ::pin_project::__private::Pin<&'pin (T)>,
+        unpinned: &'pin (U),
+    }
+    impl<T, U> Struct<T, U> {
+        #[allow(dead_code)]
+        fn project<'pin>(
+            self: _pin_project::__private::Pin<&'pin mut Self>,
+        ) -> __StructProjection<'pin, T, U> {
+            unsafe {
+                let Self { pinned, unpinned } = self.get_unchecked_mut();
+                __StructProjection {
+                    pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                    unpinned,
+                }
+            }
+        }
+        #[allow(dead_code)]
+        #[allow(clippy::missing_const_for_fn)]
+        fn project_ref<'pin>(
+            self: _pin_project::__private::Pin<&'pin Self>,
+        ) -> __StructProjectionRef<'pin, T, U> {
+            unsafe {
+                let Self { pinned, unpinned } = self.get_ref();
+                __StructProjectionRef {
+                    pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                    unpinned,
+                }
+            }
+        }
+    }
+    #[forbid(unaligned_references, safe_packed_borrows)]
+    fn __assert_not_repr_packed<T, U>(this: &Struct<T, U>) {
+        let _ = &this.pinned;
+        let _ = &this.unpinned;
+    }
+    #[allow(missing_debug_implementations)]
+    struct __Struct<'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 Struct<T, U>
+    where
+        __Struct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for Struct<T, U>
+    where
+        __Struct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    trait StructMustNotImplDrop {}
+    #[allow(clippy::drop_bounds, drop_bounds)]
+    impl<T: _pin_project::__private::Drop> StructMustNotImplDrop for T {}
+    impl<T, U> StructMustNotImplDrop for Struct<T, U> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for Struct<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/default/struct.rs b/third_party/rust/pin-project/tests/expand/default/struct.rs
new file mode 100644
index 0000000000..474f0a1161
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/default/struct.rs
@@ -0,0 +1,10 @@
+use pin_project::pin_project;
+
+#[pin_project]
+struct Struct<T, U> {
+    #[pin]
+    pinned: T,
+    unpinned: U,
+}
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/default/tuple_struct.expanded.rs b/third_party/rust/pin-project/tests/expand/default/tuple_struct.expanded.rs
new file mode 100644
index 0000000000..1c5e3b08be
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/default/tuple_struct.expanded.rs
@@ -0,0 +1,98 @@
+use pin_project::pin_project;
+#[pin(__private())]
+struct TupleStruct<T, U>(#[pin] T, U);
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    #[allow(dead_code)]
+    #[allow(clippy::mut_mut)]
+    struct __TupleStructProjection<'pin, T, U>(
+        ::pin_project::__private::Pin<&'pin mut (T)>,
+        &'pin mut (U),
+    )
+    where
+        TupleStruct<T, U>: 'pin;
+    #[allow(dead_code)]
+    #[allow(clippy::ref_option_ref)]
+    struct __TupleStructProjectionRef<'pin, T, U>(
+        ::pin_project::__private::Pin<&'pin (T)>,
+        &'pin (U),
+    )
+    where
+        TupleStruct<T, U>: 'pin;
+    impl<T, U> TupleStruct<T, U> {
+        #[allow(dead_code)]
+        fn project<'pin>(
+            self: _pin_project::__private::Pin<&'pin mut Self>,
+        ) -> __TupleStructProjection<'pin, T, U> {
+            unsafe {
+                let Self(_0, _1) = self.get_unchecked_mut();
+                __TupleStructProjection(
+                    _pin_project::__private::Pin::new_unchecked(_0),
+                    _1,
+                )
+            }
+        }
+        #[allow(dead_code)]
+        #[allow(clippy::missing_const_for_fn)]
+        fn project_ref<'pin>(
+            self: _pin_project::__private::Pin<&'pin Self>,
+        ) -> __TupleStructProjectionRef<'pin, T, U> {
+            unsafe {
+                let Self(_0, _1) = self.get_ref();
+                __TupleStructProjectionRef(
+                    _pin_project::__private::Pin::new_unchecked(_0),
+                    _1,
+                )
+            }
+        }
+    }
+    #[forbid(unaligned_references, safe_packed_borrows)]
+    fn __assert_not_repr_packed<T, U>(this: &TupleStruct<T, U>) {
+        let _ = &this.0;
+        let _ = &this.1;
+    }
+    #[allow(missing_debug_implementations)]
+    struct __TupleStruct<'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 TupleStruct<T, U>
+    where
+        __TupleStruct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for TupleStruct<T, U>
+    where
+        __TupleStruct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    trait TupleStructMustNotImplDrop {}
+    #[allow(clippy::drop_bounds, drop_bounds)]
+    impl<T: _pin_project::__private::Drop> TupleStructMustNotImplDrop for T {}
+    impl<T, U> TupleStructMustNotImplDrop for TupleStruct<T, U> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for TupleStruct<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/default/tuple_struct.rs b/third_party/rust/pin-project/tests/expand/default/tuple_struct.rs
new file mode 100644
index 0000000000..398b14f3a5
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/default/tuple_struct.rs
@@ -0,0 +1,6 @@
+use pin_project::pin_project;
+
+#[pin_project]
+struct TupleStruct<T, U>(#[pin] T, U);
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/multifields/enum.expanded.rs b/third_party/rust/pin-project/tests/expand/multifields/enum.expanded.rs
new file mode 100644
index 0000000000..8223de3418
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/multifields/enum.expanded.rs
@@ -0,0 +1,268 @@
+use pin_project::pin_project;
+#[pin(
+    __private(
+        project = EnumProj,
+        project_ref = EnumProjRef,
+        project_replace = EnumProjOwn
+    )
+)]
+enum Enum<T, U> {
+    Struct { #[pin] pinned1: T, #[pin] pinned2: T, unpinned1: U, unpinned2: U },
+    Tuple(#[pin] T, #[pin] T, U, U),
+    Unit,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(dead_code)]
+#[allow(clippy::mut_mut)]
+enum EnumProj<'pin, T, U>
+where
+    Enum<T, U>: 'pin,
+{
+    Struct {
+        pinned1: ::pin_project::__private::Pin<&'pin mut (T)>,
+        pinned2: ::pin_project::__private::Pin<&'pin mut (T)>,
+        unpinned1: &'pin mut (U),
+        unpinned2: &'pin mut (U),
+    },
+    Tuple(
+        ::pin_project::__private::Pin<&'pin mut (T)>,
+        ::pin_project::__private::Pin<&'pin mut (T)>,
+        &'pin mut (U),
+        &'pin mut (U),
+    ),
+    Unit,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(dead_code)]
+#[allow(clippy::ref_option_ref)]
+enum EnumProjRef<'pin, T, U>
+where
+    Enum<T, U>: 'pin,
+{
+    Struct {
+        pinned1: ::pin_project::__private::Pin<&'pin (T)>,
+        pinned2: ::pin_project::__private::Pin<&'pin (T)>,
+        unpinned1: &'pin (U),
+        unpinned2: &'pin (U),
+    },
+    Tuple(
+        ::pin_project::__private::Pin<&'pin (T)>,
+        ::pin_project::__private::Pin<&'pin (T)>,
+        &'pin (U),
+        &'pin (U),
+    ),
+    Unit,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(dead_code)]
+#[allow(variant_size_differences)]
+#[allow(clippy::large_enum_variant)]
+enum EnumProjOwn<T, U> {
+    Struct {
+        pinned1: ::pin_project::__private::PhantomData<T>,
+        pinned2: ::pin_project::__private::PhantomData<T>,
+        unpinned1: U,
+        unpinned2: U,
+    },
+    Tuple(
+        ::pin_project::__private::PhantomData<T>,
+        ::pin_project::__private::PhantomData<T>,
+        U,
+        U,
+    ),
+    Unit,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    impl<T, U> Enum<T, U> {
+        #[allow(dead_code)]
+        fn project<'pin>(
+            self: _pin_project::__private::Pin<&'pin mut Self>,
+        ) -> EnumProj<'pin, T, U> {
+            unsafe {
+                match self.get_unchecked_mut() {
+                    Self::Struct { pinned1, pinned2, unpinned1, unpinned2 } => {
+                        EnumProj::Struct {
+                            pinned1: _pin_project::__private::Pin::new_unchecked(
+                                pinned1,
+                            ),
+                            pinned2: _pin_project::__private::Pin::new_unchecked(
+                                pinned2,
+                            ),
+                            unpinned1,
+                            unpinned2,
+                        }
+                    }
+                    Self::Tuple(_0, _1, _2, _3) => {
+                        EnumProj::Tuple(
+                            _pin_project::__private::Pin::new_unchecked(_0),
+                            _pin_project::__private::Pin::new_unchecked(_1),
+                            _2,
+                            _3,
+                        )
+                    }
+                    Self::Unit => EnumProj::Unit,
+                }
+            }
+        }
+        #[allow(dead_code)]
+        #[allow(clippy::missing_const_for_fn)]
+        fn project_ref<'pin>(
+            self: _pin_project::__private::Pin<&'pin Self>,
+        ) -> EnumProjRef<'pin, T, U> {
+            unsafe {
+                match self.get_ref() {
+                    Self::Struct { pinned1, pinned2, unpinned1, unpinned2 } => {
+                        EnumProjRef::Struct {
+                            pinned1: _pin_project::__private::Pin::new_unchecked(
+                                pinned1,
+                            ),
+                            pinned2: _pin_project::__private::Pin::new_unchecked(
+                                pinned2,
+                            ),
+                            unpinned1,
+                            unpinned2,
+                        }
+                    }
+                    Self::Tuple(_0, _1, _2, _3) => {
+                        EnumProjRef::Tuple(
+                            _pin_project::__private::Pin::new_unchecked(_0),
+                            _pin_project::__private::Pin::new_unchecked(_1),
+                            _2,
+                            _3,
+                        )
+                    }
+                    Self::Unit => EnumProjRef::Unit,
+                }
+            }
+        }
+        #[allow(dead_code)]
+        fn project_replace(
+            self: _pin_project::__private::Pin<&mut Self>,
+            __replacement: Self,
+        ) -> EnumProjOwn<T, U> {
+            unsafe {
+                let __self_ptr: *mut Self = self.get_unchecked_mut();
+                let __guard = _pin_project::__private::UnsafeOverwriteGuard::new(
+                    __self_ptr,
+                    __replacement,
+                );
+                match &mut *__self_ptr {
+                    Self::Struct { pinned1, pinned2, unpinned1, unpinned2 } => {
+                        let __result = EnumProjOwn::Struct {
+                            pinned1: _pin_project::__private::PhantomData,
+                            pinned2: _pin_project::__private::PhantomData,
+                            unpinned1: _pin_project::__private::ptr::read(unpinned1),
+                            unpinned2: _pin_project::__private::ptr::read(unpinned2),
+                        };
+                        {
+                            let __guard = _pin_project::__private::UnsafeDropInPlaceGuard::new(
+                                pinned2,
+                            );
+                            let __guard = _pin_project::__private::UnsafeDropInPlaceGuard::new(
+                                pinned1,
+                            );
+                        }
+                        __result
+                    }
+                    Self::Tuple(_0, _1, _2, _3) => {
+                        let __result = EnumProjOwn::Tuple(
+                            _pin_project::__private::PhantomData,
+                            _pin_project::__private::PhantomData,
+                            _pin_project::__private::ptr::read(_2),
+                            _pin_project::__private::ptr::read(_3),
+                        );
+                        {
+                            let __guard = _pin_project::__private::UnsafeDropInPlaceGuard::new(
+                                _1,
+                            );
+                            let __guard = _pin_project::__private::UnsafeDropInPlaceGuard::new(
+                                _0,
+                            );
+                        }
+                        __result
+                    }
+                    Self::Unit => {
+                        let __result = EnumProjOwn::Unit;
+                        {}
+                        __result
+                    }
+                }
+            }
+        }
+    }
+    #[allow(missing_debug_implementations)]
+    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,
+        __field1: T,
+        __field2: T,
+        __field3: T,
+    }
+    impl<'pin, T, U> _pin_project::__private::Unpin for Enum<T, U>
+    where
+        __Enum<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for Enum<T, U>
+    where
+        __Enum<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    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> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for Enum<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/multifields/enum.rs b/third_party/rust/pin-project/tests/expand/multifields/enum.rs
new file mode 100644
index 0000000000..754d48c9f9
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/multifields/enum.rs
@@ -0,0 +1,17 @@
+use pin_project::pin_project;
+
+#[pin_project(project = EnumProj, project_ref = EnumProjRef, project_replace = EnumProjOwn)]
+enum Enum<T, U> {
+    Struct {
+        #[pin]
+        pinned1: T,
+        #[pin]
+        pinned2: T,
+        unpinned1: U,
+        unpinned2: U,
+    },
+    Tuple(#[pin] T, #[pin] T, U, U),
+    Unit,
+}
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/multifields/struct.expanded.rs b/third_party/rust/pin-project/tests/expand/multifields/struct.expanded.rs
new file mode 100644
index 0000000000..df8dc92575
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/multifields/struct.expanded.rs
@@ -0,0 +1,155 @@
+use pin_project::pin_project;
+#[pin(__private(project_replace))]
+struct Struct<T, U> {
+    #[pin]
+    pinned1: T,
+    #[pin]
+    pinned2: T,
+    unpinned1: U,
+    unpinned2: U,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    #[allow(dead_code)]
+    #[allow(clippy::mut_mut)]
+    struct __StructProjection<'pin, T, U>
+    where
+        Struct<T, U>: 'pin,
+    {
+        pinned1: ::pin_project::__private::Pin<&'pin mut (T)>,
+        pinned2: ::pin_project::__private::Pin<&'pin mut (T)>,
+        unpinned1: &'pin mut (U),
+        unpinned2: &'pin mut (U),
+    }
+    #[allow(dead_code)]
+    #[allow(clippy::ref_option_ref)]
+    struct __StructProjectionRef<'pin, T, U>
+    where
+        Struct<T, U>: 'pin,
+    {
+        pinned1: ::pin_project::__private::Pin<&'pin (T)>,
+        pinned2: ::pin_project::__private::Pin<&'pin (T)>,
+        unpinned1: &'pin (U),
+        unpinned2: &'pin (U),
+    }
+    #[allow(dead_code)]
+    struct __StructProjectionOwned<T, U> {
+        pinned1: ::pin_project::__private::PhantomData<T>,
+        pinned2: ::pin_project::__private::PhantomData<T>,
+        unpinned1: U,
+        unpinned2: U,
+    }
+    impl<T, U> Struct<T, U> {
+        #[allow(dead_code)]
+        fn project<'pin>(
+            self: _pin_project::__private::Pin<&'pin mut Self>,
+        ) -> __StructProjection<'pin, T, U> {
+            unsafe {
+                let Self { pinned1, pinned2, unpinned1, unpinned2 } = self
+                    .get_unchecked_mut();
+                __StructProjection {
+                    pinned1: _pin_project::__private::Pin::new_unchecked(pinned1),
+                    pinned2: _pin_project::__private::Pin::new_unchecked(pinned2),
+                    unpinned1,
+                    unpinned2,
+                }
+            }
+        }
+        #[allow(dead_code)]
+        #[allow(clippy::missing_const_for_fn)]
+        fn project_ref<'pin>(
+            self: _pin_project::__private::Pin<&'pin Self>,
+        ) -> __StructProjectionRef<'pin, T, U> {
+            unsafe {
+                let Self { pinned1, pinned2, unpinned1, unpinned2 } = self.get_ref();
+                __StructProjectionRef {
+                    pinned1: _pin_project::__private::Pin::new_unchecked(pinned1),
+                    pinned2: _pin_project::__private::Pin::new_unchecked(pinned2),
+                    unpinned1,
+                    unpinned2,
+                }
+            }
+        }
+        #[allow(dead_code)]
+        fn project_replace(
+            self: _pin_project::__private::Pin<&mut Self>,
+            __replacement: Self,
+        ) -> __StructProjectionOwned<T, U> {
+            unsafe {
+                let __self_ptr: *mut Self = self.get_unchecked_mut();
+                let __guard = _pin_project::__private::UnsafeOverwriteGuard::new(
+                    __self_ptr,
+                    __replacement,
+                );
+                let Self { pinned1, pinned2, unpinned1, unpinned2 } = &mut *__self_ptr;
+                let __result = __StructProjectionOwned {
+                    pinned1: _pin_project::__private::PhantomData,
+                    pinned2: _pin_project::__private::PhantomData,
+                    unpinned1: _pin_project::__private::ptr::read(unpinned1),
+                    unpinned2: _pin_project::__private::ptr::read(unpinned2),
+                };
+                {
+                    let __guard = _pin_project::__private::UnsafeDropInPlaceGuard::new(
+                        pinned2,
+                    );
+                    let __guard = _pin_project::__private::UnsafeDropInPlaceGuard::new(
+                        pinned1,
+                    );
+                }
+                __result
+            }
+        }
+    }
+    #[forbid(unaligned_references, safe_packed_borrows)]
+    fn __assert_not_repr_packed<T, U>(this: &Struct<T, U>) {
+        let _ = &this.pinned1;
+        let _ = &this.pinned2;
+        let _ = &this.unpinned1;
+        let _ = &this.unpinned2;
+    }
+    #[allow(missing_debug_implementations)]
+    struct __Struct<'pin, T, U> {
+        __pin_project_use_generics: _pin_project::__private::AlwaysUnpin<
+            'pin,
+            (
+                _pin_project::__private::PhantomData<T>,
+                _pin_project::__private::PhantomData<U>,
+            ),
+        >,
+        __field0: T,
+        __field1: T,
+    }
+    impl<'pin, T, U> _pin_project::__private::Unpin for Struct<T, U>
+    where
+        __Struct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for Struct<T, U>
+    where
+        __Struct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    trait StructMustNotImplDrop {}
+    #[allow(clippy::drop_bounds, drop_bounds)]
+    impl<T: _pin_project::__private::Drop> StructMustNotImplDrop for T {}
+    impl<T, U> StructMustNotImplDrop for Struct<T, U> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for Struct<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/multifields/struct.rs b/third_party/rust/pin-project/tests/expand/multifields/struct.rs
new file mode 100644
index 0000000000..3b319bf813
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/multifields/struct.rs
@@ -0,0 +1,13 @@
+use pin_project::pin_project;
+
+#[pin_project(project_replace)]
+struct Struct<T, U> {
+    #[pin]
+    pinned1: T,
+    #[pin]
+    pinned2: T,
+    unpinned1: U,
+    unpinned2: U,
+}
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/multifields/tuple_struct.expanded.rs b/third_party/rust/pin-project/tests/expand/multifields/tuple_struct.expanded.rs
new file mode 100644
index 0000000000..0c85f9a605
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/multifields/tuple_struct.expanded.rs
@@ -0,0 +1,145 @@
+use pin_project::pin_project;
+#[pin(__private(project_replace))]
+struct TupleStruct<T, U>(#[pin] T, #[pin] T, U, U);
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    #[allow(dead_code)]
+    #[allow(clippy::mut_mut)]
+    struct __TupleStructProjection<'pin, T, U>(
+        ::pin_project::__private::Pin<&'pin mut (T)>,
+        ::pin_project::__private::Pin<&'pin mut (T)>,
+        &'pin mut (U),
+        &'pin mut (U),
+    )
+    where
+        TupleStruct<T, U>: 'pin;
+    #[allow(dead_code)]
+    #[allow(clippy::ref_option_ref)]
+    struct __TupleStructProjectionRef<'pin, T, U>(
+        ::pin_project::__private::Pin<&'pin (T)>,
+        ::pin_project::__private::Pin<&'pin (T)>,
+        &'pin (U),
+        &'pin (U),
+    )
+    where
+        TupleStruct<T, U>: 'pin;
+    #[allow(dead_code)]
+    struct __TupleStructProjectionOwned<T, U>(
+        ::pin_project::__private::PhantomData<T>,
+        ::pin_project::__private::PhantomData<T>,
+        U,
+        U,
+    );
+    impl<T, U> TupleStruct<T, U> {
+        #[allow(dead_code)]
+        fn project<'pin>(
+            self: _pin_project::__private::Pin<&'pin mut Self>,
+        ) -> __TupleStructProjection<'pin, T, U> {
+            unsafe {
+                let Self(_0, _1, _2, _3) = self.get_unchecked_mut();
+                __TupleStructProjection(
+                    _pin_project::__private::Pin::new_unchecked(_0),
+                    _pin_project::__private::Pin::new_unchecked(_1),
+                    _2,
+                    _3,
+                )
+            }
+        }
+        #[allow(dead_code)]
+        #[allow(clippy::missing_const_for_fn)]
+        fn project_ref<'pin>(
+            self: _pin_project::__private::Pin<&'pin Self>,
+        ) -> __TupleStructProjectionRef<'pin, T, U> {
+            unsafe {
+                let Self(_0, _1, _2, _3) = self.get_ref();
+                __TupleStructProjectionRef(
+                    _pin_project::__private::Pin::new_unchecked(_0),
+                    _pin_project::__private::Pin::new_unchecked(_1),
+                    _2,
+                    _3,
+                )
+            }
+        }
+        #[allow(dead_code)]
+        fn project_replace(
+            self: _pin_project::__private::Pin<&mut Self>,
+            __replacement: Self,
+        ) -> __TupleStructProjectionOwned<T, U> {
+            unsafe {
+                let __self_ptr: *mut Self = self.get_unchecked_mut();
+                let __guard = _pin_project::__private::UnsafeOverwriteGuard::new(
+                    __self_ptr,
+                    __replacement,
+                );
+                let Self(_0, _1, _2, _3) = &mut *__self_ptr;
+                let __result = __TupleStructProjectionOwned(
+                    _pin_project::__private::PhantomData,
+                    _pin_project::__private::PhantomData,
+                    _pin_project::__private::ptr::read(_2),
+                    _pin_project::__private::ptr::read(_3),
+                );
+                {
+                    let __guard = _pin_project::__private::UnsafeDropInPlaceGuard::new(
+                        _1,
+                    );
+                    let __guard = _pin_project::__private::UnsafeDropInPlaceGuard::new(
+                        _0,
+                    );
+                }
+                __result
+            }
+        }
+    }
+    #[forbid(unaligned_references, safe_packed_borrows)]
+    fn __assert_not_repr_packed<T, U>(this: &TupleStruct<T, U>) {
+        let _ = &this.0;
+        let _ = &this.1;
+        let _ = &this.2;
+        let _ = &this.3;
+    }
+    #[allow(missing_debug_implementations)]
+    struct __TupleStruct<'pin, T, U> {
+        __pin_project_use_generics: _pin_project::__private::AlwaysUnpin<
+            'pin,
+            (
+                _pin_project::__private::PhantomData<T>,
+                _pin_project::__private::PhantomData<U>,
+            ),
+        >,
+        __field0: T,
+        __field1: T,
+    }
+    impl<'pin, T, U> _pin_project::__private::Unpin for TupleStruct<T, U>
+    where
+        __TupleStruct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for TupleStruct<T, U>
+    where
+        __TupleStruct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    trait TupleStructMustNotImplDrop {}
+    #[allow(clippy::drop_bounds, drop_bounds)]
+    impl<T: _pin_project::__private::Drop> TupleStructMustNotImplDrop for T {}
+    impl<T, U> TupleStructMustNotImplDrop for TupleStruct<T, U> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for TupleStruct<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/multifields/tuple_struct.rs b/third_party/rust/pin-project/tests/expand/multifields/tuple_struct.rs
new file mode 100644
index 0000000000..bc92eee52c
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/multifields/tuple_struct.rs
@@ -0,0 +1,6 @@
+use pin_project::pin_project;
+
+#[pin_project(project_replace)]
+struct TupleStruct<T, U>(#[pin] T, #[pin] T, U, U);
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/naming/enum-all.expanded.rs b/third_party/rust/pin-project/tests/expand/naming/enum-all.expanded.rs
new file mode 100644
index 0000000000..8dbe768ef3
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/naming/enum-all.expanded.rs
@@ -0,0 +1,204 @@
+use pin_project::pin_project;
+#[pin(__private(project = Proj, project_ref = ProjRef, project_replace = ProjOwn))]
+enum Enum<T, U> {
+    Struct { #[pin] pinned: T, unpinned: U },
+    Tuple(#[pin] T, U),
+    Unit,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(dead_code)]
+#[allow(clippy::mut_mut)]
+enum Proj<'pin, T, U>
+where
+    Enum<T, U>: 'pin,
+{
+    Struct {
+        pinned: ::pin_project::__private::Pin<&'pin mut (T)>,
+        unpinned: &'pin mut (U),
+    },
+    Tuple(::pin_project::__private::Pin<&'pin mut (T)>, &'pin mut (U)),
+    Unit,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(dead_code)]
+#[allow(clippy::ref_option_ref)]
+enum ProjRef<'pin, T, U>
+where
+    Enum<T, U>: 'pin,
+{
+    Struct { pinned: ::pin_project::__private::Pin<&'pin (T)>, unpinned: &'pin (U) },
+    Tuple(::pin_project::__private::Pin<&'pin (T)>, &'pin (U)),
+    Unit,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(dead_code)]
+#[allow(variant_size_differences)]
+#[allow(clippy::large_enum_variant)]
+enum ProjOwn<T, U> {
+    Struct { pinned: ::pin_project::__private::PhantomData<T>, unpinned: U },
+    Tuple(::pin_project::__private::PhantomData<T>, U),
+    Unit,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    impl<T, U> Enum<T, U> {
+        #[allow(dead_code)]
+        fn project<'pin>(
+            self: _pin_project::__private::Pin<&'pin mut Self>,
+        ) -> Proj<'pin, T, U> {
+            unsafe {
+                match self.get_unchecked_mut() {
+                    Self::Struct { pinned, unpinned } => {
+                        Proj::Struct {
+                            pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                            unpinned,
+                        }
+                    }
+                    Self::Tuple(_0, _1) => {
+                        Proj::Tuple(_pin_project::__private::Pin::new_unchecked(_0), _1)
+                    }
+                    Self::Unit => Proj::Unit,
+                }
+            }
+        }
+        #[allow(dead_code)]
+        #[allow(clippy::missing_const_for_fn)]
+        fn project_ref<'pin>(
+            self: _pin_project::__private::Pin<&'pin Self>,
+        ) -> ProjRef<'pin, T, U> {
+            unsafe {
+                match self.get_ref() {
+                    Self::Struct { pinned, unpinned } => {
+                        ProjRef::Struct {
+                            pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                            unpinned,
+                        }
+                    }
+                    Self::Tuple(_0, _1) => {
+                        ProjRef::Tuple(
+                            _pin_project::__private::Pin::new_unchecked(_0),
+                            _1,
+                        )
+                    }
+                    Self::Unit => ProjRef::Unit,
+                }
+            }
+        }
+        #[allow(dead_code)]
+        fn project_replace(
+            self: _pin_project::__private::Pin<&mut Self>,
+            __replacement: Self,
+        ) -> ProjOwn<T, U> {
+            unsafe {
+                let __self_ptr: *mut Self = self.get_unchecked_mut();
+                let __guard = _pin_project::__private::UnsafeOverwriteGuard::new(
+                    __self_ptr,
+                    __replacement,
+                );
+                match &mut *__self_ptr {
+                    Self::Struct { pinned, unpinned } => {
+                        let __result = ProjOwn::Struct {
+                            pinned: _pin_project::__private::PhantomData,
+                            unpinned: _pin_project::__private::ptr::read(unpinned),
+                        };
+                        {
+                            let __guard = _pin_project::__private::UnsafeDropInPlaceGuard::new(
+                                pinned,
+                            );
+                        }
+                        __result
+                    }
+                    Self::Tuple(_0, _1) => {
+                        let __result = ProjOwn::Tuple(
+                            _pin_project::__private::PhantomData,
+                            _pin_project::__private::ptr::read(_1),
+                        );
+                        {
+                            let __guard = _pin_project::__private::UnsafeDropInPlaceGuard::new(
+                                _0,
+                            );
+                        }
+                        __result
+                    }
+                    Self::Unit => {
+                        let __result = ProjOwn::Unit;
+                        {}
+                        __result
+                    }
+                }
+            }
+        }
+    }
+    #[allow(missing_debug_implementations)]
+    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,
+        __field1: T,
+    }
+    impl<'pin, T, U> _pin_project::__private::Unpin for Enum<T, U>
+    where
+        __Enum<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for Enum<T, U>
+    where
+        __Enum<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    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> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for Enum<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/naming/enum-all.rs b/third_party/rust/pin-project/tests/expand/naming/enum-all.rs
new file mode 100644
index 0000000000..dd513e6c36
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/naming/enum-all.rs
@@ -0,0 +1,14 @@
+use pin_project::pin_project;
+
+#[pin_project(project = Proj, project_ref = ProjRef, project_replace = ProjOwn)]
+enum Enum<T, U> {
+    Struct {
+        #[pin]
+        pinned: T,
+        unpinned: U,
+    },
+    Tuple(#[pin] T, U),
+    Unit,
+}
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/naming/enum-mut.expanded.rs b/third_party/rust/pin-project/tests/expand/naming/enum-mut.expanded.rs
new file mode 100644
index 0000000000..c6916ece85
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/naming/enum-mut.expanded.rs
@@ -0,0 +1,99 @@
+use pin_project::pin_project;
+#[pin(__private(project = Proj))]
+enum Enum<T, U> {
+    Struct { #[pin] pinned: T, unpinned: U },
+    Tuple(#[pin] T, U),
+    Unit,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(dead_code)]
+#[allow(clippy::mut_mut)]
+enum Proj<'pin, T, U>
+where
+    Enum<T, U>: 'pin,
+{
+    Struct {
+        pinned: ::pin_project::__private::Pin<&'pin mut (T)>,
+        unpinned: &'pin mut (U),
+    },
+    Tuple(::pin_project::__private::Pin<&'pin mut (T)>, &'pin mut (U)),
+    Unit,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    impl<T, U> Enum<T, U> {
+        #[allow(dead_code)]
+        fn project<'pin>(
+            self: _pin_project::__private::Pin<&'pin mut Self>,
+        ) -> Proj<'pin, T, U> {
+            unsafe {
+                match self.get_unchecked_mut() {
+                    Self::Struct { pinned, unpinned } => {
+                        Proj::Struct {
+                            pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                            unpinned,
+                        }
+                    }
+                    Self::Tuple(_0, _1) => {
+                        Proj::Tuple(_pin_project::__private::Pin::new_unchecked(_0), _1)
+                    }
+                    Self::Unit => Proj::Unit,
+                }
+            }
+        }
+    }
+    #[allow(missing_debug_implementations)]
+    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,
+        __field1: T,
+    }
+    impl<'pin, T, U> _pin_project::__private::Unpin for Enum<T, U>
+    where
+        __Enum<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for Enum<T, U>
+    where
+        __Enum<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    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> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for Enum<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/naming/enum-mut.rs b/third_party/rust/pin-project/tests/expand/naming/enum-mut.rs
new file mode 100644
index 0000000000..818276f39c
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/naming/enum-mut.rs
@@ -0,0 +1,14 @@
+use pin_project::pin_project;
+
+#[pin_project(project = Proj)]
+enum Enum<T, U> {
+    Struct {
+        #[pin]
+        pinned: T,
+        unpinned: U,
+    },
+    Tuple(#[pin] T, U),
+    Unit,
+}
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/naming/enum-none.expanded.rs b/third_party/rust/pin-project/tests/expand/naming/enum-none.expanded.rs
new file mode 100644
index 0000000000..46477d1e9d
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/naming/enum-none.expanded.rs
@@ -0,0 +1,56 @@
+use pin_project::pin_project;
+#[pin(__private())]
+enum Enum<T, U> {
+    Struct { #[pin] pinned: T, unpinned: U },
+    Tuple(#[pin] T, U),
+    Unit,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    impl<T, U> Enum<T, U> {}
+    #[allow(missing_debug_implementations)]
+    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,
+        __field1: T,
+    }
+    impl<'pin, T, U> _pin_project::__private::Unpin for Enum<T, U>
+    where
+        __Enum<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for Enum<T, U>
+    where
+        __Enum<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    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> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for Enum<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/naming/enum-none.rs b/third_party/rust/pin-project/tests/expand/naming/enum-none.rs
new file mode 100644
index 0000000000..a87438db38
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/naming/enum-none.rs
@@ -0,0 +1,14 @@
+use pin_project::pin_project;
+
+#[pin_project]
+enum Enum<T, U> {
+    Struct {
+        #[pin]
+        pinned: T,
+        unpinned: U,
+    },
+    Tuple(#[pin] T, U),
+    Unit,
+}
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/naming/enum-own.expanded.rs b/third_party/rust/pin-project/tests/expand/naming/enum-own.expanded.rs
new file mode 100644
index 0000000000..ddeb00c4b5
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/naming/enum-own.expanded.rs
@@ -0,0 +1,119 @@
+use pin_project::pin_project;
+#[pin(__private(project_replace = ProjOwn))]
+enum Enum<T, U> {
+    Struct { #[pin] pinned: T, unpinned: U },
+    Tuple(#[pin] T, U),
+    Unit,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(dead_code)]
+#[allow(variant_size_differences)]
+#[allow(clippy::large_enum_variant)]
+enum ProjOwn<T, U> {
+    Struct { pinned: ::pin_project::__private::PhantomData<T>, unpinned: U },
+    Tuple(::pin_project::__private::PhantomData<T>, U),
+    Unit,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    impl<T, U> Enum<T, U> {
+        #[allow(dead_code)]
+        fn project_replace(
+            self: _pin_project::__private::Pin<&mut Self>,
+            __replacement: Self,
+        ) -> ProjOwn<T, U> {
+            unsafe {
+                let __self_ptr: *mut Self = self.get_unchecked_mut();
+                let __guard = _pin_project::__private::UnsafeOverwriteGuard::new(
+                    __self_ptr,
+                    __replacement,
+                );
+                match &mut *__self_ptr {
+                    Self::Struct { pinned, unpinned } => {
+                        let __result = ProjOwn::Struct {
+                            pinned: _pin_project::__private::PhantomData,
+                            unpinned: _pin_project::__private::ptr::read(unpinned),
+                        };
+                        {
+                            let __guard = _pin_project::__private::UnsafeDropInPlaceGuard::new(
+                                pinned,
+                            );
+                        }
+                        __result
+                    }
+                    Self::Tuple(_0, _1) => {
+                        let __result = ProjOwn::Tuple(
+                            _pin_project::__private::PhantomData,
+                            _pin_project::__private::ptr::read(_1),
+                        );
+                        {
+                            let __guard = _pin_project::__private::UnsafeDropInPlaceGuard::new(
+                                _0,
+                            );
+                        }
+                        __result
+                    }
+                    Self::Unit => {
+                        let __result = ProjOwn::Unit;
+                        {}
+                        __result
+                    }
+                }
+            }
+        }
+    }
+    #[allow(missing_debug_implementations)]
+    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,
+        __field1: T,
+    }
+    impl<'pin, T, U> _pin_project::__private::Unpin for Enum<T, U>
+    where
+        __Enum<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for Enum<T, U>
+    where
+        __Enum<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    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> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for Enum<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/naming/enum-own.rs b/third_party/rust/pin-project/tests/expand/naming/enum-own.rs
new file mode 100644
index 0000000000..cf886974db
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/naming/enum-own.rs
@@ -0,0 +1,14 @@
+use pin_project::pin_project;
+
+#[pin_project(project_replace = ProjOwn)]
+enum Enum<T, U> {
+    Struct {
+        #[pin]
+        pinned: T,
+        unpinned: U,
+    },
+    Tuple(#[pin] T, U),
+    Unit,
+}
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/naming/enum-ref.expanded.rs b/third_party/rust/pin-project/tests/expand/naming/enum-ref.expanded.rs
new file mode 100644
index 0000000000..1a49584e75
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/naming/enum-ref.expanded.rs
@@ -0,0 +1,100 @@
+use pin_project::pin_project;
+#[pin(__private(project_ref = ProjRef))]
+enum Enum<T, U> {
+    Struct { #[pin] pinned: T, unpinned: U },
+    Tuple(#[pin] T, U),
+    Unit,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(dead_code)]
+#[allow(clippy::ref_option_ref)]
+enum ProjRef<'pin, T, U>
+where
+    Enum<T, U>: 'pin,
+{
+    Struct { pinned: ::pin_project::__private::Pin<&'pin (T)>, unpinned: &'pin (U) },
+    Tuple(::pin_project::__private::Pin<&'pin (T)>, &'pin (U)),
+    Unit,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    impl<T, U> Enum<T, U> {
+        #[allow(dead_code)]
+        #[allow(clippy::missing_const_for_fn)]
+        fn project_ref<'pin>(
+            self: _pin_project::__private::Pin<&'pin Self>,
+        ) -> ProjRef<'pin, T, U> {
+            unsafe {
+                match self.get_ref() {
+                    Self::Struct { pinned, unpinned } => {
+                        ProjRef::Struct {
+                            pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                            unpinned,
+                        }
+                    }
+                    Self::Tuple(_0, _1) => {
+                        ProjRef::Tuple(
+                            _pin_project::__private::Pin::new_unchecked(_0),
+                            _1,
+                        )
+                    }
+                    Self::Unit => ProjRef::Unit,
+                }
+            }
+        }
+    }
+    #[allow(missing_debug_implementations)]
+    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,
+        __field1: T,
+    }
+    impl<'pin, T, U> _pin_project::__private::Unpin for Enum<T, U>
+    where
+        __Enum<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for Enum<T, U>
+    where
+        __Enum<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    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> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for Enum<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/naming/enum-ref.rs b/third_party/rust/pin-project/tests/expand/naming/enum-ref.rs
new file mode 100644
index 0000000000..b1ff805ce5
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/naming/enum-ref.rs
@@ -0,0 +1,14 @@
+use pin_project::pin_project;
+
+#[pin_project(project_ref = ProjRef)]
+enum Enum<T, U> {
+    Struct {
+        #[pin]
+        pinned: T,
+        unpinned: U,
+    },
+    Tuple(#[pin] T, U),
+    Unit,
+}
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/naming/struct-all.expanded.rs b/third_party/rust/pin-project/tests/expand/naming/struct-all.expanded.rs
new file mode 100644
index 0000000000..e598a4f354
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/naming/struct-all.expanded.rs
@@ -0,0 +1,163 @@
+use pin_project::pin_project;
+#[pin(__private(project = Proj, project_ref = ProjRef, project_replace = ProjOwn))]
+struct Struct<T, U> {
+    #[pin]
+    pinned: T,
+    unpinned: U,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(dead_code)]
+#[allow(clippy::mut_mut)]
+struct Proj<'pin, T, U>
+where
+    Struct<T, U>: 'pin,
+{
+    pinned: ::pin_project::__private::Pin<&'pin mut (T)>,
+    unpinned: &'pin mut (U),
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(dead_code)]
+#[allow(clippy::ref_option_ref)]
+struct ProjRef<'pin, T, U>
+where
+    Struct<T, U>: 'pin,
+{
+    pinned: ::pin_project::__private::Pin<&'pin (T)>,
+    unpinned: &'pin (U),
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(dead_code)]
+struct ProjOwn<T, U> {
+    pinned: ::pin_project::__private::PhantomData<T>,
+    unpinned: U,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    impl<T, U> Struct<T, U> {
+        #[allow(dead_code)]
+        fn project<'pin>(
+            self: _pin_project::__private::Pin<&'pin mut Self>,
+        ) -> Proj<'pin, T, U> {
+            unsafe {
+                let Self { pinned, unpinned } = self.get_unchecked_mut();
+                Proj {
+                    pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                    unpinned,
+                }
+            }
+        }
+        #[allow(dead_code)]
+        #[allow(clippy::missing_const_for_fn)]
+        fn project_ref<'pin>(
+            self: _pin_project::__private::Pin<&'pin Self>,
+        ) -> ProjRef<'pin, T, U> {
+            unsafe {
+                let Self { pinned, unpinned } = self.get_ref();
+                ProjRef {
+                    pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                    unpinned,
+                }
+            }
+        }
+        #[allow(dead_code)]
+        fn project_replace(
+            self: _pin_project::__private::Pin<&mut Self>,
+            __replacement: Self,
+        ) -> ProjOwn<T, U> {
+            unsafe {
+                let __self_ptr: *mut Self = self.get_unchecked_mut();
+                let __guard = _pin_project::__private::UnsafeOverwriteGuard::new(
+                    __self_ptr,
+                    __replacement,
+                );
+                let Self { pinned, unpinned } = &mut *__self_ptr;
+                let __result = ProjOwn {
+                    pinned: _pin_project::__private::PhantomData,
+                    unpinned: _pin_project::__private::ptr::read(unpinned),
+                };
+                {
+                    let __guard = _pin_project::__private::UnsafeDropInPlaceGuard::new(
+                        pinned,
+                    );
+                }
+                __result
+            }
+        }
+    }
+    #[forbid(unaligned_references, safe_packed_borrows)]
+    fn __assert_not_repr_packed<T, U>(this: &Struct<T, U>) {
+        let _ = &this.pinned;
+        let _ = &this.unpinned;
+    }
+    #[allow(missing_debug_implementations)]
+    struct __Struct<'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 Struct<T, U>
+    where
+        __Struct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for Struct<T, U>
+    where
+        __Struct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    trait StructMustNotImplDrop {}
+    #[allow(clippy::drop_bounds, drop_bounds)]
+    impl<T: _pin_project::__private::Drop> StructMustNotImplDrop for T {}
+    impl<T, U> StructMustNotImplDrop for Struct<T, U> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for Struct<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/naming/struct-all.rs b/third_party/rust/pin-project/tests/expand/naming/struct-all.rs
new file mode 100644
index 0000000000..c229ba4e0e
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/naming/struct-all.rs
@@ -0,0 +1,10 @@
+use pin_project::pin_project;
+
+#[pin_project(project = Proj, project_ref = ProjRef, project_replace = ProjOwn)]
+struct Struct<T, U> {
+    #[pin]
+    pinned: T,
+    unpinned: U,
+}
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/naming/struct-mut.expanded.rs b/third_party/rust/pin-project/tests/expand/naming/struct-mut.expanded.rs
new file mode 100644
index 0000000000..88782ee253
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/naming/struct-mut.expanded.rs
@@ -0,0 +1,114 @@
+use pin_project::pin_project;
+#[pin(__private(project = Proj))]
+struct Struct<T, U> {
+    #[pin]
+    pinned: T,
+    unpinned: U,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(dead_code)]
+#[allow(clippy::mut_mut)]
+struct Proj<'pin, T, U>
+where
+    Struct<T, U>: 'pin,
+{
+    pinned: ::pin_project::__private::Pin<&'pin mut (T)>,
+    unpinned: &'pin mut (U),
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    #[allow(dead_code)]
+    #[allow(clippy::ref_option_ref)]
+    struct __StructProjectionRef<'pin, T, U>
+    where
+        Struct<T, U>: 'pin,
+    {
+        pinned: ::pin_project::__private::Pin<&'pin (T)>,
+        unpinned: &'pin (U),
+    }
+    impl<T, U> Struct<T, U> {
+        #[allow(dead_code)]
+        fn project<'pin>(
+            self: _pin_project::__private::Pin<&'pin mut Self>,
+        ) -> Proj<'pin, T, U> {
+            unsafe {
+                let Self { pinned, unpinned } = self.get_unchecked_mut();
+                Proj {
+                    pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                    unpinned,
+                }
+            }
+        }
+        #[allow(dead_code)]
+        #[allow(clippy::missing_const_for_fn)]
+        fn project_ref<'pin>(
+            self: _pin_project::__private::Pin<&'pin Self>,
+        ) -> __StructProjectionRef<'pin, T, U> {
+            unsafe {
+                let Self { pinned, unpinned } = self.get_ref();
+                __StructProjectionRef {
+                    pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                    unpinned,
+                }
+            }
+        }
+    }
+    #[forbid(unaligned_references, safe_packed_borrows)]
+    fn __assert_not_repr_packed<T, U>(this: &Struct<T, U>) {
+        let _ = &this.pinned;
+        let _ = &this.unpinned;
+    }
+    #[allow(missing_debug_implementations)]
+    struct __Struct<'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 Struct<T, U>
+    where
+        __Struct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for Struct<T, U>
+    where
+        __Struct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    trait StructMustNotImplDrop {}
+    #[allow(clippy::drop_bounds, drop_bounds)]
+    impl<T: _pin_project::__private::Drop> StructMustNotImplDrop for T {}
+    impl<T, U> StructMustNotImplDrop for Struct<T, U> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for Struct<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/naming/struct-mut.rs b/third_party/rust/pin-project/tests/expand/naming/struct-mut.rs
new file mode 100644
index 0000000000..2f554d324d
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/naming/struct-mut.rs
@@ -0,0 +1,10 @@
+use pin_project::pin_project;
+
+#[pin_project(project = Proj)]
+struct Struct<T, U> {
+    #[pin]
+    pinned: T,
+    unpinned: U,
+}
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/naming/struct-none.expanded.rs b/third_party/rust/pin-project/tests/expand/naming/struct-none.expanded.rs
new file mode 100644
index 0000000000..0005d863c4
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/naming/struct-none.expanded.rs
@@ -0,0 +1,104 @@
+use pin_project::pin_project;
+#[pin(__private())]
+struct Struct<T, U> {
+    #[pin]
+    pinned: T,
+    unpinned: U,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    #[allow(dead_code)]
+    #[allow(clippy::mut_mut)]
+    struct __StructProjection<'pin, T, U>
+    where
+        Struct<T, U>: 'pin,
+    {
+        pinned: ::pin_project::__private::Pin<&'pin mut (T)>,
+        unpinned: &'pin mut (U),
+    }
+    #[allow(dead_code)]
+    #[allow(clippy::ref_option_ref)]
+    struct __StructProjectionRef<'pin, T, U>
+    where
+        Struct<T, U>: 'pin,
+    {
+        pinned: ::pin_project::__private::Pin<&'pin (T)>,
+        unpinned: &'pin (U),
+    }
+    impl<T, U> Struct<T, U> {
+        #[allow(dead_code)]
+        fn project<'pin>(
+            self: _pin_project::__private::Pin<&'pin mut Self>,
+        ) -> __StructProjection<'pin, T, U> {
+            unsafe {
+                let Self { pinned, unpinned } = self.get_unchecked_mut();
+                __StructProjection {
+                    pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                    unpinned,
+                }
+            }
+        }
+        #[allow(dead_code)]
+        #[allow(clippy::missing_const_for_fn)]
+        fn project_ref<'pin>(
+            self: _pin_project::__private::Pin<&'pin Self>,
+        ) -> __StructProjectionRef<'pin, T, U> {
+            unsafe {
+                let Self { pinned, unpinned } = self.get_ref();
+                __StructProjectionRef {
+                    pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                    unpinned,
+                }
+            }
+        }
+    }
+    #[forbid(unaligned_references, safe_packed_borrows)]
+    fn __assert_not_repr_packed<T, U>(this: &Struct<T, U>) {
+        let _ = &this.pinned;
+        let _ = &this.unpinned;
+    }
+    #[allow(missing_debug_implementations)]
+    struct __Struct<'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 Struct<T, U>
+    where
+        __Struct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for Struct<T, U>
+    where
+        __Struct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    trait StructMustNotImplDrop {}
+    #[allow(clippy::drop_bounds, drop_bounds)]
+    impl<T: _pin_project::__private::Drop> StructMustNotImplDrop for T {}
+    impl<T, U> StructMustNotImplDrop for Struct<T, U> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for Struct<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/naming/struct-none.rs b/third_party/rust/pin-project/tests/expand/naming/struct-none.rs
new file mode 100644
index 0000000000..474f0a1161
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/naming/struct-none.rs
@@ -0,0 +1,10 @@
+use pin_project::pin_project;
+
+#[pin_project]
+struct Struct<T, U> {
+    #[pin]
+    pinned: T,
+    unpinned: U,
+}
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/naming/struct-own.expanded.rs b/third_party/rust/pin-project/tests/expand/naming/struct-own.expanded.rs
new file mode 100644
index 0000000000..cc248628a9
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/naming/struct-own.expanded.rs
@@ -0,0 +1,143 @@
+use pin_project::pin_project;
+#[pin(__private(project_replace = ProjOwn))]
+struct Struct<T, U> {
+    #[pin]
+    pinned: T,
+    unpinned: U,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(dead_code)]
+struct ProjOwn<T, U> {
+    pinned: ::pin_project::__private::PhantomData<T>,
+    unpinned: U,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    #[allow(dead_code)]
+    #[allow(clippy::mut_mut)]
+    struct __StructProjection<'pin, T, U>
+    where
+        Struct<T, U>: 'pin,
+    {
+        pinned: ::pin_project::__private::Pin<&'pin mut (T)>,
+        unpinned: &'pin mut (U),
+    }
+    #[allow(dead_code)]
+    #[allow(clippy::ref_option_ref)]
+    struct __StructProjectionRef<'pin, T, U>
+    where
+        Struct<T, U>: 'pin,
+    {
+        pinned: ::pin_project::__private::Pin<&'pin (T)>,
+        unpinned: &'pin (U),
+    }
+    impl<T, U> Struct<T, U> {
+        #[allow(dead_code)]
+        fn project<'pin>(
+            self: _pin_project::__private::Pin<&'pin mut Self>,
+        ) -> __StructProjection<'pin, T, U> {
+            unsafe {
+                let Self { pinned, unpinned } = self.get_unchecked_mut();
+                __StructProjection {
+                    pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                    unpinned,
+                }
+            }
+        }
+        #[allow(dead_code)]
+        #[allow(clippy::missing_const_for_fn)]
+        fn project_ref<'pin>(
+            self: _pin_project::__private::Pin<&'pin Self>,
+        ) -> __StructProjectionRef<'pin, T, U> {
+            unsafe {
+                let Self { pinned, unpinned } = self.get_ref();
+                __StructProjectionRef {
+                    pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                    unpinned,
+                }
+            }
+        }
+        #[allow(dead_code)]
+        fn project_replace(
+            self: _pin_project::__private::Pin<&mut Self>,
+            __replacement: Self,
+        ) -> ProjOwn<T, U> {
+            unsafe {
+                let __self_ptr: *mut Self = self.get_unchecked_mut();
+                let __guard = _pin_project::__private::UnsafeOverwriteGuard::new(
+                    __self_ptr,
+                    __replacement,
+                );
+                let Self { pinned, unpinned } = &mut *__self_ptr;
+                let __result = ProjOwn {
+                    pinned: _pin_project::__private::PhantomData,
+                    unpinned: _pin_project::__private::ptr::read(unpinned),
+                };
+                {
+                    let __guard = _pin_project::__private::UnsafeDropInPlaceGuard::new(
+                        pinned,
+                    );
+                }
+                __result
+            }
+        }
+    }
+    #[forbid(unaligned_references, safe_packed_borrows)]
+    fn __assert_not_repr_packed<T, U>(this: &Struct<T, U>) {
+        let _ = &this.pinned;
+        let _ = &this.unpinned;
+    }
+    #[allow(missing_debug_implementations)]
+    struct __Struct<'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 Struct<T, U>
+    where
+        __Struct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for Struct<T, U>
+    where
+        __Struct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    trait StructMustNotImplDrop {}
+    #[allow(clippy::drop_bounds, drop_bounds)]
+    impl<T: _pin_project::__private::Drop> StructMustNotImplDrop for T {}
+    impl<T, U> StructMustNotImplDrop for Struct<T, U> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for Struct<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/naming/struct-own.rs b/third_party/rust/pin-project/tests/expand/naming/struct-own.rs
new file mode 100644
index 0000000000..4924362ba0
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/naming/struct-own.rs
@@ -0,0 +1,10 @@
+use pin_project::pin_project;
+
+#[pin_project(project_replace = ProjOwn)]
+struct Struct<T, U> {
+    #[pin]
+    pinned: T,
+    unpinned: U,
+}
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/naming/struct-ref.expanded.rs b/third_party/rust/pin-project/tests/expand/naming/struct-ref.expanded.rs
new file mode 100644
index 0000000000..e392f6f9c3
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/naming/struct-ref.expanded.rs
@@ -0,0 +1,114 @@
+use pin_project::pin_project;
+#[pin(__private(project_ref = ProjRef))]
+struct Struct<T, U> {
+    #[pin]
+    pinned: T,
+    unpinned: U,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(dead_code)]
+#[allow(clippy::ref_option_ref)]
+struct ProjRef<'pin, T, U>
+where
+    Struct<T, U>: 'pin,
+{
+    pinned: ::pin_project::__private::Pin<&'pin (T)>,
+    unpinned: &'pin (U),
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    #[allow(dead_code)]
+    #[allow(clippy::mut_mut)]
+    struct __StructProjection<'pin, T, U>
+    where
+        Struct<T, U>: 'pin,
+    {
+        pinned: ::pin_project::__private::Pin<&'pin mut (T)>,
+        unpinned: &'pin mut (U),
+    }
+    impl<T, U> Struct<T, U> {
+        #[allow(dead_code)]
+        fn project<'pin>(
+            self: _pin_project::__private::Pin<&'pin mut Self>,
+        ) -> __StructProjection<'pin, T, U> {
+            unsafe {
+                let Self { pinned, unpinned } = self.get_unchecked_mut();
+                __StructProjection {
+                    pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                    unpinned,
+                }
+            }
+        }
+        #[allow(dead_code)]
+        #[allow(clippy::missing_const_for_fn)]
+        fn project_ref<'pin>(
+            self: _pin_project::__private::Pin<&'pin Self>,
+        ) -> ProjRef<'pin, T, U> {
+            unsafe {
+                let Self { pinned, unpinned } = self.get_ref();
+                ProjRef {
+                    pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                    unpinned,
+                }
+            }
+        }
+    }
+    #[forbid(unaligned_references, safe_packed_borrows)]
+    fn __assert_not_repr_packed<T, U>(this: &Struct<T, U>) {
+        let _ = &this.pinned;
+        let _ = &this.unpinned;
+    }
+    #[allow(missing_debug_implementations)]
+    struct __Struct<'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 Struct<T, U>
+    where
+        __Struct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for Struct<T, U>
+    where
+        __Struct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    trait StructMustNotImplDrop {}
+    #[allow(clippy::drop_bounds, drop_bounds)]
+    impl<T: _pin_project::__private::Drop> StructMustNotImplDrop for T {}
+    impl<T, U> StructMustNotImplDrop for Struct<T, U> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for Struct<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/naming/struct-ref.rs b/third_party/rust/pin-project/tests/expand/naming/struct-ref.rs
new file mode 100644
index 0000000000..4e29a162d4
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/naming/struct-ref.rs
@@ -0,0 +1,10 @@
+use pin_project::pin_project;
+
+#[pin_project(project_ref = ProjRef)]
+struct Struct<T, U> {
+    #[pin]
+    pinned: T,
+    unpinned: U,
+}
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/naming/tuple_struct-all.expanded.rs b/third_party/rust/pin-project/tests/expand/naming/tuple_struct-all.expanded.rs
new file mode 100644
index 0000000000..8c148ed95b
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/naming/tuple_struct-all.expanded.rs
@@ -0,0 +1,148 @@
+use pin_project::pin_project;
+#[pin(__private(project = Proj, project_ref = ProjRef, project_replace = ProjOwn))]
+struct TupleStruct<T, U>(#[pin] T, U);
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(dead_code)]
+#[allow(clippy::mut_mut)]
+struct Proj<'pin, T, U>(
+    ::pin_project::__private::Pin<&'pin mut (T)>,
+    &'pin mut (U),
+)
+where
+    TupleStruct<T, U>: 'pin;
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(dead_code)]
+#[allow(clippy::ref_option_ref)]
+struct ProjRef<'pin, T, U>(
+    ::pin_project::__private::Pin<&'pin (T)>,
+    &'pin (U),
+)
+where
+    TupleStruct<T, U>: 'pin;
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(dead_code)]
+struct ProjOwn<T, U>(::pin_project::__private::PhantomData<T>, U);
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    impl<T, U> TupleStruct<T, U> {
+        #[allow(dead_code)]
+        fn project<'pin>(
+            self: _pin_project::__private::Pin<&'pin mut Self>,
+        ) -> Proj<'pin, T, U> {
+            unsafe {
+                let Self(_0, _1) = self.get_unchecked_mut();
+                Proj(_pin_project::__private::Pin::new_unchecked(_0), _1)
+            }
+        }
+        #[allow(dead_code)]
+        #[allow(clippy::missing_const_for_fn)]
+        fn project_ref<'pin>(
+            self: _pin_project::__private::Pin<&'pin Self>,
+        ) -> ProjRef<'pin, T, U> {
+            unsafe {
+                let Self(_0, _1) = self.get_ref();
+                ProjRef(_pin_project::__private::Pin::new_unchecked(_0), _1)
+            }
+        }
+        #[allow(dead_code)]
+        fn project_replace(
+            self: _pin_project::__private::Pin<&mut Self>,
+            __replacement: Self,
+        ) -> ProjOwn<T, U> {
+            unsafe {
+                let __self_ptr: *mut Self = self.get_unchecked_mut();
+                let __guard = _pin_project::__private::UnsafeOverwriteGuard::new(
+                    __self_ptr,
+                    __replacement,
+                );
+                let Self(_0, _1) = &mut *__self_ptr;
+                let __result = ProjOwn(
+                    _pin_project::__private::PhantomData,
+                    _pin_project::__private::ptr::read(_1),
+                );
+                {
+                    let __guard = _pin_project::__private::UnsafeDropInPlaceGuard::new(
+                        _0,
+                    );
+                }
+                __result
+            }
+        }
+    }
+    #[forbid(unaligned_references, safe_packed_borrows)]
+    fn __assert_not_repr_packed<T, U>(this: &TupleStruct<T, U>) {
+        let _ = &this.0;
+        let _ = &this.1;
+    }
+    #[allow(missing_debug_implementations)]
+    struct __TupleStruct<'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 TupleStruct<T, U>
+    where
+        __TupleStruct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for TupleStruct<T, U>
+    where
+        __TupleStruct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    trait TupleStructMustNotImplDrop {}
+    #[allow(clippy::drop_bounds, drop_bounds)]
+    impl<T: _pin_project::__private::Drop> TupleStructMustNotImplDrop for T {}
+    impl<T, U> TupleStructMustNotImplDrop for TupleStruct<T, U> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for TupleStruct<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/naming/tuple_struct-all.rs b/third_party/rust/pin-project/tests/expand/naming/tuple_struct-all.rs
new file mode 100644
index 0000000000..0d95cb0080
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/naming/tuple_struct-all.rs
@@ -0,0 +1,6 @@
+use pin_project::pin_project;
+
+#[pin_project(project = Proj, project_ref = ProjRef, project_replace = ProjOwn)]
+struct TupleStruct<T, U>(#[pin] T, U);
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/naming/tuple_struct-mut.expanded.rs b/third_party/rust/pin-project/tests/expand/naming/tuple_struct-mut.expanded.rs
new file mode 100644
index 0000000000..79c790100d
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/naming/tuple_struct-mut.expanded.rs
@@ -0,0 +1,105 @@
+use pin_project::pin_project;
+#[pin(__private(project = Proj))]
+struct TupleStruct<T, U>(#[pin] T, U);
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(dead_code)]
+#[allow(clippy::mut_mut)]
+struct Proj<'pin, T, U>(
+    ::pin_project::__private::Pin<&'pin mut (T)>,
+    &'pin mut (U),
+)
+where
+    TupleStruct<T, U>: 'pin;
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    #[allow(dead_code)]
+    #[allow(clippy::ref_option_ref)]
+    struct __TupleStructProjectionRef<'pin, T, U>(
+        ::pin_project::__private::Pin<&'pin (T)>,
+        &'pin (U),
+    )
+    where
+        TupleStruct<T, U>: 'pin;
+    impl<T, U> TupleStruct<T, U> {
+        #[allow(dead_code)]
+        fn project<'pin>(
+            self: _pin_project::__private::Pin<&'pin mut Self>,
+        ) -> Proj<'pin, T, U> {
+            unsafe {
+                let Self(_0, _1) = self.get_unchecked_mut();
+                Proj(_pin_project::__private::Pin::new_unchecked(_0), _1)
+            }
+        }
+        #[allow(dead_code)]
+        #[allow(clippy::missing_const_for_fn)]
+        fn project_ref<'pin>(
+            self: _pin_project::__private::Pin<&'pin Self>,
+        ) -> __TupleStructProjectionRef<'pin, T, U> {
+            unsafe {
+                let Self(_0, _1) = self.get_ref();
+                __TupleStructProjectionRef(
+                    _pin_project::__private::Pin::new_unchecked(_0),
+                    _1,
+                )
+            }
+        }
+    }
+    #[forbid(unaligned_references, safe_packed_borrows)]
+    fn __assert_not_repr_packed<T, U>(this: &TupleStruct<T, U>) {
+        let _ = &this.0;
+        let _ = &this.1;
+    }
+    #[allow(missing_debug_implementations)]
+    struct __TupleStruct<'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 TupleStruct<T, U>
+    where
+        __TupleStruct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for TupleStruct<T, U>
+    where
+        __TupleStruct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    trait TupleStructMustNotImplDrop {}
+    #[allow(clippy::drop_bounds, drop_bounds)]
+    impl<T: _pin_project::__private::Drop> TupleStructMustNotImplDrop for T {}
+    impl<T, U> TupleStructMustNotImplDrop for TupleStruct<T, U> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for TupleStruct<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/naming/tuple_struct-mut.rs b/third_party/rust/pin-project/tests/expand/naming/tuple_struct-mut.rs
new file mode 100644
index 0000000000..e9779a6cad
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/naming/tuple_struct-mut.rs
@@ -0,0 +1,6 @@
+use pin_project::pin_project;
+
+#[pin_project(project = Proj)]
+struct TupleStruct<T, U>(#[pin] T, U);
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/naming/tuple_struct-none.expanded.rs b/third_party/rust/pin-project/tests/expand/naming/tuple_struct-none.expanded.rs
new file mode 100644
index 0000000000..1c5e3b08be
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/naming/tuple_struct-none.expanded.rs
@@ -0,0 +1,98 @@
+use pin_project::pin_project;
+#[pin(__private())]
+struct TupleStruct<T, U>(#[pin] T, U);
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    #[allow(dead_code)]
+    #[allow(clippy::mut_mut)]
+    struct __TupleStructProjection<'pin, T, U>(
+        ::pin_project::__private::Pin<&'pin mut (T)>,
+        &'pin mut (U),
+    )
+    where
+        TupleStruct<T, U>: 'pin;
+    #[allow(dead_code)]
+    #[allow(clippy::ref_option_ref)]
+    struct __TupleStructProjectionRef<'pin, T, U>(
+        ::pin_project::__private::Pin<&'pin (T)>,
+        &'pin (U),
+    )
+    where
+        TupleStruct<T, U>: 'pin;
+    impl<T, U> TupleStruct<T, U> {
+        #[allow(dead_code)]
+        fn project<'pin>(
+            self: _pin_project::__private::Pin<&'pin mut Self>,
+        ) -> __TupleStructProjection<'pin, T, U> {
+            unsafe {
+                let Self(_0, _1) = self.get_unchecked_mut();
+                __TupleStructProjection(
+                    _pin_project::__private::Pin::new_unchecked(_0),
+                    _1,
+                )
+            }
+        }
+        #[allow(dead_code)]
+        #[allow(clippy::missing_const_for_fn)]
+        fn project_ref<'pin>(
+            self: _pin_project::__private::Pin<&'pin Self>,
+        ) -> __TupleStructProjectionRef<'pin, T, U> {
+            unsafe {
+                let Self(_0, _1) = self.get_ref();
+                __TupleStructProjectionRef(
+                    _pin_project::__private::Pin::new_unchecked(_0),
+                    _1,
+                )
+            }
+        }
+    }
+    #[forbid(unaligned_references, safe_packed_borrows)]
+    fn __assert_not_repr_packed<T, U>(this: &TupleStruct<T, U>) {
+        let _ = &this.0;
+        let _ = &this.1;
+    }
+    #[allow(missing_debug_implementations)]
+    struct __TupleStruct<'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 TupleStruct<T, U>
+    where
+        __TupleStruct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for TupleStruct<T, U>
+    where
+        __TupleStruct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    trait TupleStructMustNotImplDrop {}
+    #[allow(clippy::drop_bounds, drop_bounds)]
+    impl<T: _pin_project::__private::Drop> TupleStructMustNotImplDrop for T {}
+    impl<T, U> TupleStructMustNotImplDrop for TupleStruct<T, U> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for TupleStruct<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/naming/tuple_struct-none.rs b/third_party/rust/pin-project/tests/expand/naming/tuple_struct-none.rs
new file mode 100644
index 0000000000..398b14f3a5
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/naming/tuple_struct-none.rs
@@ -0,0 +1,6 @@
+use pin_project::pin_project;
+
+#[pin_project]
+struct TupleStruct<T, U>(#[pin] T, U);
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/naming/tuple_struct-own.expanded.rs b/third_party/rust/pin-project/tests/expand/naming/tuple_struct-own.expanded.rs
new file mode 100644
index 0000000000..37e4c34373
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/naming/tuple_struct-own.expanded.rs
@@ -0,0 +1,134 @@
+use pin_project::pin_project;
+#[pin(__private(project_replace = ProjOwn))]
+struct TupleStruct<T, U>(#[pin] T, U);
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(dead_code)]
+struct ProjOwn<T, U>(::pin_project::__private::PhantomData<T>, U);
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    #[allow(dead_code)]
+    #[allow(clippy::mut_mut)]
+    struct __TupleStructProjection<'pin, T, U>(
+        ::pin_project::__private::Pin<&'pin mut (T)>,
+        &'pin mut (U),
+    )
+    where
+        TupleStruct<T, U>: 'pin;
+    #[allow(dead_code)]
+    #[allow(clippy::ref_option_ref)]
+    struct __TupleStructProjectionRef<'pin, T, U>(
+        ::pin_project::__private::Pin<&'pin (T)>,
+        &'pin (U),
+    )
+    where
+        TupleStruct<T, U>: 'pin;
+    impl<T, U> TupleStruct<T, U> {
+        #[allow(dead_code)]
+        fn project<'pin>(
+            self: _pin_project::__private::Pin<&'pin mut Self>,
+        ) -> __TupleStructProjection<'pin, T, U> {
+            unsafe {
+                let Self(_0, _1) = self.get_unchecked_mut();
+                __TupleStructProjection(
+                    _pin_project::__private::Pin::new_unchecked(_0),
+                    _1,
+                )
+            }
+        }
+        #[allow(dead_code)]
+        #[allow(clippy::missing_const_for_fn)]
+        fn project_ref<'pin>(
+            self: _pin_project::__private::Pin<&'pin Self>,
+        ) -> __TupleStructProjectionRef<'pin, T, U> {
+            unsafe {
+                let Self(_0, _1) = self.get_ref();
+                __TupleStructProjectionRef(
+                    _pin_project::__private::Pin::new_unchecked(_0),
+                    _1,
+                )
+            }
+        }
+        #[allow(dead_code)]
+        fn project_replace(
+            self: _pin_project::__private::Pin<&mut Self>,
+            __replacement: Self,
+        ) -> ProjOwn<T, U> {
+            unsafe {
+                let __self_ptr: *mut Self = self.get_unchecked_mut();
+                let __guard = _pin_project::__private::UnsafeOverwriteGuard::new(
+                    __self_ptr,
+                    __replacement,
+                );
+                let Self(_0, _1) = &mut *__self_ptr;
+                let __result = ProjOwn(
+                    _pin_project::__private::PhantomData,
+                    _pin_project::__private::ptr::read(_1),
+                );
+                {
+                    let __guard = _pin_project::__private::UnsafeDropInPlaceGuard::new(
+                        _0,
+                    );
+                }
+                __result
+            }
+        }
+    }
+    #[forbid(unaligned_references, safe_packed_borrows)]
+    fn __assert_not_repr_packed<T, U>(this: &TupleStruct<T, U>) {
+        let _ = &this.0;
+        let _ = &this.1;
+    }
+    #[allow(missing_debug_implementations)]
+    struct __TupleStruct<'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 TupleStruct<T, U>
+    where
+        __TupleStruct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for TupleStruct<T, U>
+    where
+        __TupleStruct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    trait TupleStructMustNotImplDrop {}
+    #[allow(clippy::drop_bounds, drop_bounds)]
+    impl<T: _pin_project::__private::Drop> TupleStructMustNotImplDrop for T {}
+    impl<T, U> TupleStructMustNotImplDrop for TupleStruct<T, U> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for TupleStruct<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/naming/tuple_struct-own.rs b/third_party/rust/pin-project/tests/expand/naming/tuple_struct-own.rs
new file mode 100644
index 0000000000..a15ad4094a
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/naming/tuple_struct-own.rs
@@ -0,0 +1,6 @@
+use pin_project::pin_project;
+
+#[pin_project(project_replace = ProjOwn)]
+struct TupleStruct<T, U>(#[pin] T, U);
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/naming/tuple_struct-ref.expanded.rs b/third_party/rust/pin-project/tests/expand/naming/tuple_struct-ref.expanded.rs
new file mode 100644
index 0000000000..8c8686808c
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/naming/tuple_struct-ref.expanded.rs
@@ -0,0 +1,105 @@
+use pin_project::pin_project;
+#[pin(__private(project_ref = ProjRef))]
+struct TupleStruct<T, U>(#[pin] T, U);
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(dead_code)]
+#[allow(clippy::ref_option_ref)]
+struct ProjRef<'pin, T, U>(
+    ::pin_project::__private::Pin<&'pin (T)>,
+    &'pin (U),
+)
+where
+    TupleStruct<T, U>: 'pin;
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    #[allow(dead_code)]
+    #[allow(clippy::mut_mut)]
+    struct __TupleStructProjection<'pin, T, U>(
+        ::pin_project::__private::Pin<&'pin mut (T)>,
+        &'pin mut (U),
+    )
+    where
+        TupleStruct<T, U>: 'pin;
+    impl<T, U> TupleStruct<T, U> {
+        #[allow(dead_code)]
+        fn project<'pin>(
+            self: _pin_project::__private::Pin<&'pin mut Self>,
+        ) -> __TupleStructProjection<'pin, T, U> {
+            unsafe {
+                let Self(_0, _1) = self.get_unchecked_mut();
+                __TupleStructProjection(
+                    _pin_project::__private::Pin::new_unchecked(_0),
+                    _1,
+                )
+            }
+        }
+        #[allow(dead_code)]
+        #[allow(clippy::missing_const_for_fn)]
+        fn project_ref<'pin>(
+            self: _pin_project::__private::Pin<&'pin Self>,
+        ) -> ProjRef<'pin, T, U> {
+            unsafe {
+                let Self(_0, _1) = self.get_ref();
+                ProjRef(_pin_project::__private::Pin::new_unchecked(_0), _1)
+            }
+        }
+    }
+    #[forbid(unaligned_references, safe_packed_borrows)]
+    fn __assert_not_repr_packed<T, U>(this: &TupleStruct<T, U>) {
+        let _ = &this.0;
+        let _ = &this.1;
+    }
+    #[allow(missing_debug_implementations)]
+    struct __TupleStruct<'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 TupleStruct<T, U>
+    where
+        __TupleStruct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for TupleStruct<T, U>
+    where
+        __TupleStruct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    trait TupleStructMustNotImplDrop {}
+    #[allow(clippy::drop_bounds, drop_bounds)]
+    impl<T: _pin_project::__private::Drop> TupleStructMustNotImplDrop for T {}
+    impl<T, U> TupleStructMustNotImplDrop for TupleStruct<T, U> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for TupleStruct<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/naming/tuple_struct-ref.rs b/third_party/rust/pin-project/tests/expand/naming/tuple_struct-ref.rs
new file mode 100644
index 0000000000..cc61edfb79
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/naming/tuple_struct-ref.rs
@@ -0,0 +1,6 @@
+use pin_project::pin_project;
+
+#[pin_project(project_ref = ProjRef)]
+struct TupleStruct<T, U>(#[pin] T, U);
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/not_unpin/enum.expanded.rs b/third_party/rust/pin-project/tests/expand/not_unpin/enum.expanded.rs
new file mode 100644
index 0000000000..98e7bbe16d
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/not_unpin/enum.expanded.rs
@@ -0,0 +1,139 @@
+use pin_project::pin_project;
+#[pin(__private(!Unpin, project = EnumProj, project_ref = EnumProjRef))]
+enum Enum<T, U> {
+    Struct { #[pin] pinned: T, unpinned: U },
+    Tuple(#[pin] T, U),
+    Unit,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(dead_code)]
+#[allow(clippy::mut_mut)]
+enum EnumProj<'pin, T, U>
+where
+    Enum<T, U>: 'pin,
+{
+    Struct {
+        pinned: ::pin_project::__private::Pin<&'pin mut (T)>,
+        unpinned: &'pin mut (U),
+    },
+    Tuple(::pin_project::__private::Pin<&'pin mut (T)>, &'pin mut (U)),
+    Unit,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(dead_code)]
+#[allow(clippy::ref_option_ref)]
+enum EnumProjRef<'pin, T, U>
+where
+    Enum<T, U>: 'pin,
+{
+    Struct { pinned: ::pin_project::__private::Pin<&'pin (T)>, unpinned: &'pin (U) },
+    Tuple(::pin_project::__private::Pin<&'pin (T)>, &'pin (U)),
+    Unit,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    impl<T, U> Enum<T, U> {
+        #[allow(dead_code)]
+        fn project<'pin>(
+            self: _pin_project::__private::Pin<&'pin mut Self>,
+        ) -> EnumProj<'pin, T, U> {
+            unsafe {
+                match self.get_unchecked_mut() {
+                    Self::Struct { pinned, unpinned } => {
+                        EnumProj::Struct {
+                            pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                            unpinned,
+                        }
+                    }
+                    Self::Tuple(_0, _1) => {
+                        EnumProj::Tuple(
+                            _pin_project::__private::Pin::new_unchecked(_0),
+                            _1,
+                        )
+                    }
+                    Self::Unit => EnumProj::Unit,
+                }
+            }
+        }
+        #[allow(dead_code)]
+        #[allow(clippy::missing_const_for_fn)]
+        fn project_ref<'pin>(
+            self: _pin_project::__private::Pin<&'pin Self>,
+        ) -> EnumProjRef<'pin, T, U> {
+            unsafe {
+                match self.get_ref() {
+                    Self::Struct { pinned, unpinned } => {
+                        EnumProjRef::Struct {
+                            pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                            unpinned,
+                        }
+                    }
+                    Self::Tuple(_0, _1) => {
+                        EnumProjRef::Tuple(
+                            _pin_project::__private::Pin::new_unchecked(_0),
+                            _1,
+                        )
+                    }
+                    Self::Unit => EnumProjRef::Unit,
+                }
+            }
+        }
+    }
+    impl<'pin, T, U> _pin_project::__private::Unpin for Enum<T, U>
+    where
+        _pin_project::__private::Wrapper<
+            'pin,
+            _pin_project::__private::PhantomPinned,
+        >: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for Enum<T, U>
+    where
+        _pin_project::__private::Wrapper<
+            'pin,
+            _pin_project::__private::PhantomPinned,
+        >: _pin_project::__private::Unpin,
+    {}
+    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> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for Enum<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/not_unpin/enum.rs b/third_party/rust/pin-project/tests/expand/not_unpin/enum.rs
new file mode 100644
index 0000000000..ac0b3b80c0
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/not_unpin/enum.rs
@@ -0,0 +1,14 @@
+use pin_project::pin_project;
+
+#[pin_project(!Unpin, project = EnumProj, project_ref = EnumProjRef)]
+enum Enum<T, U> {
+    Struct {
+        #[pin]
+        pinned: T,
+        unpinned: U,
+    },
+    Tuple(#[pin] T, U),
+    Unit,
+}
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/not_unpin/struct.expanded.rs b/third_party/rust/pin-project/tests/expand/not_unpin/struct.expanded.rs
new file mode 100644
index 0000000000..420f21aaaf
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/not_unpin/struct.expanded.rs
@@ -0,0 +1,99 @@
+use pin_project::pin_project;
+#[pin(__private(!Unpin))]
+struct Struct<T, U> {
+    #[pin]
+    pinned: T,
+    unpinned: U,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    #[allow(dead_code)]
+    #[allow(clippy::mut_mut)]
+    struct __StructProjection<'pin, T, U>
+    where
+        Struct<T, U>: 'pin,
+    {
+        pinned: ::pin_project::__private::Pin<&'pin mut (T)>,
+        unpinned: &'pin mut (U),
+    }
+    #[allow(dead_code)]
+    #[allow(clippy::ref_option_ref)]
+    struct __StructProjectionRef<'pin, T, U>
+    where
+        Struct<T, U>: 'pin,
+    {
+        pinned: ::pin_project::__private::Pin<&'pin (T)>,
+        unpinned: &'pin (U),
+    }
+    impl<T, U> Struct<T, U> {
+        #[allow(dead_code)]
+        fn project<'pin>(
+            self: _pin_project::__private::Pin<&'pin mut Self>,
+        ) -> __StructProjection<'pin, T, U> {
+            unsafe {
+                let Self { pinned, unpinned } = self.get_unchecked_mut();
+                __StructProjection {
+                    pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                    unpinned,
+                }
+            }
+        }
+        #[allow(dead_code)]
+        #[allow(clippy::missing_const_for_fn)]
+        fn project_ref<'pin>(
+            self: _pin_project::__private::Pin<&'pin Self>,
+        ) -> __StructProjectionRef<'pin, T, U> {
+            unsafe {
+                let Self { pinned, unpinned } = self.get_ref();
+                __StructProjectionRef {
+                    pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                    unpinned,
+                }
+            }
+        }
+    }
+    #[forbid(unaligned_references, safe_packed_borrows)]
+    fn __assert_not_repr_packed<T, U>(this: &Struct<T, U>) {
+        let _ = &this.pinned;
+        let _ = &this.unpinned;
+    }
+    impl<'pin, T, U> _pin_project::__private::Unpin for Struct<T, U>
+    where
+        _pin_project::__private::Wrapper<
+            'pin,
+            _pin_project::__private::PhantomPinned,
+        >: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for Struct<T, U>
+    where
+        _pin_project::__private::Wrapper<
+            'pin,
+            _pin_project::__private::PhantomPinned,
+        >: _pin_project::__private::Unpin,
+    {}
+    trait StructMustNotImplDrop {}
+    #[allow(clippy::drop_bounds, drop_bounds)]
+    impl<T: _pin_project::__private::Drop> StructMustNotImplDrop for T {}
+    impl<T, U> StructMustNotImplDrop for Struct<T, U> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for Struct<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/not_unpin/struct.rs b/third_party/rust/pin-project/tests/expand/not_unpin/struct.rs
new file mode 100644
index 0000000000..233e6d41f8
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/not_unpin/struct.rs
@@ -0,0 +1,10 @@
+use pin_project::pin_project;
+
+#[pin_project(!Unpin)]
+struct Struct<T, U> {
+    #[pin]
+    pinned: T,
+    unpinned: U,
+}
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/not_unpin/tuple_struct.expanded.rs b/third_party/rust/pin-project/tests/expand/not_unpin/tuple_struct.expanded.rs
new file mode 100644
index 0000000000..99621f496d
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/not_unpin/tuple_struct.expanded.rs
@@ -0,0 +1,93 @@
+use pin_project::pin_project;
+#[pin(__private(!Unpin))]
+struct TupleStruct<T, U>(#[pin] T, U);
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    #[allow(dead_code)]
+    #[allow(clippy::mut_mut)]
+    struct __TupleStructProjection<'pin, T, U>(
+        ::pin_project::__private::Pin<&'pin mut (T)>,
+        &'pin mut (U),
+    )
+    where
+        TupleStruct<T, U>: 'pin;
+    #[allow(dead_code)]
+    #[allow(clippy::ref_option_ref)]
+    struct __TupleStructProjectionRef<'pin, T, U>(
+        ::pin_project::__private::Pin<&'pin (T)>,
+        &'pin (U),
+    )
+    where
+        TupleStruct<T, U>: 'pin;
+    impl<T, U> TupleStruct<T, U> {
+        #[allow(dead_code)]
+        fn project<'pin>(
+            self: _pin_project::__private::Pin<&'pin mut Self>,
+        ) -> __TupleStructProjection<'pin, T, U> {
+            unsafe {
+                let Self(_0, _1) = self.get_unchecked_mut();
+                __TupleStructProjection(
+                    _pin_project::__private::Pin::new_unchecked(_0),
+                    _1,
+                )
+            }
+        }
+        #[allow(dead_code)]
+        #[allow(clippy::missing_const_for_fn)]
+        fn project_ref<'pin>(
+            self: _pin_project::__private::Pin<&'pin Self>,
+        ) -> __TupleStructProjectionRef<'pin, T, U> {
+            unsafe {
+                let Self(_0, _1) = self.get_ref();
+                __TupleStructProjectionRef(
+                    _pin_project::__private::Pin::new_unchecked(_0),
+                    _1,
+                )
+            }
+        }
+    }
+    #[forbid(unaligned_references, safe_packed_borrows)]
+    fn __assert_not_repr_packed<T, U>(this: &TupleStruct<T, U>) {
+        let _ = &this.0;
+        let _ = &this.1;
+    }
+    impl<'pin, T, U> _pin_project::__private::Unpin for TupleStruct<T, U>
+    where
+        _pin_project::__private::Wrapper<
+            'pin,
+            _pin_project::__private::PhantomPinned,
+        >: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for TupleStruct<T, U>
+    where
+        _pin_project::__private::Wrapper<
+            'pin,
+            _pin_project::__private::PhantomPinned,
+        >: _pin_project::__private::Unpin,
+    {}
+    trait TupleStructMustNotImplDrop {}
+    #[allow(clippy::drop_bounds, drop_bounds)]
+    impl<T: _pin_project::__private::Drop> TupleStructMustNotImplDrop for T {}
+    impl<T, U> TupleStructMustNotImplDrop for TupleStruct<T, U> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for TupleStruct<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/not_unpin/tuple_struct.rs b/third_party/rust/pin-project/tests/expand/not_unpin/tuple_struct.rs
new file mode 100644
index 0000000000..c8065db6ad
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/not_unpin/tuple_struct.rs
@@ -0,0 +1,6 @@
+use pin_project::pin_project;
+
+#[pin_project(!Unpin)]
+struct TupleStruct<T, U>(#[pin] T, U);
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/pinned_drop/enum.expanded.rs b/third_party/rust/pin-project/tests/expand/pinned_drop/enum.expanded.rs
new file mode 100644
index 0000000000..1a8e746127
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/pinned_drop/enum.expanded.rs
@@ -0,0 +1,157 @@
+use std::pin::Pin;
+use pin_project::{pin_project, pinned_drop};
+#[pin(__private(PinnedDrop, project = EnumProj, project_ref = EnumProjRef))]
+enum Enum<T, U> {
+    Struct { #[pin] pinned: T, unpinned: U },
+    Tuple(#[pin] T, U),
+    Unit,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(dead_code)]
+#[allow(clippy::mut_mut)]
+enum EnumProj<'pin, T, U>
+where
+    Enum<T, U>: 'pin,
+{
+    Struct {
+        pinned: ::pin_project::__private::Pin<&'pin mut (T)>,
+        unpinned: &'pin mut (U),
+    },
+    Tuple(::pin_project::__private::Pin<&'pin mut (T)>, &'pin mut (U)),
+    Unit,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(dead_code)]
+#[allow(clippy::ref_option_ref)]
+enum EnumProjRef<'pin, T, U>
+where
+    Enum<T, U>: 'pin,
+{
+    Struct { pinned: ::pin_project::__private::Pin<&'pin (T)>, unpinned: &'pin (U) },
+    Tuple(::pin_project::__private::Pin<&'pin (T)>, &'pin (U)),
+    Unit,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    impl<T, U> Enum<T, U> {
+        #[allow(dead_code)]
+        fn project<'pin>(
+            self: _pin_project::__private::Pin<&'pin mut Self>,
+        ) -> EnumProj<'pin, T, U> {
+            unsafe {
+                match self.get_unchecked_mut() {
+                    Self::Struct { pinned, unpinned } => {
+                        EnumProj::Struct {
+                            pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                            unpinned,
+                        }
+                    }
+                    Self::Tuple(_0, _1) => {
+                        EnumProj::Tuple(
+                            _pin_project::__private::Pin::new_unchecked(_0),
+                            _1,
+                        )
+                    }
+                    Self::Unit => EnumProj::Unit,
+                }
+            }
+        }
+        #[allow(dead_code)]
+        #[allow(clippy::missing_const_for_fn)]
+        fn project_ref<'pin>(
+            self: _pin_project::__private::Pin<&'pin Self>,
+        ) -> EnumProjRef<'pin, T, U> {
+            unsafe {
+                match self.get_ref() {
+                    Self::Struct { pinned, unpinned } => {
+                        EnumProjRef::Struct {
+                            pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                            unpinned,
+                        }
+                    }
+                    Self::Tuple(_0, _1) => {
+                        EnumProjRef::Tuple(
+                            _pin_project::__private::Pin::new_unchecked(_0),
+                            _1,
+                        )
+                    }
+                    Self::Unit => EnumProjRef::Unit,
+                }
+            }
+        }
+    }
+    #[allow(missing_debug_implementations)]
+    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,
+        __field1: T,
+    }
+    impl<'pin, T, U> _pin_project::__private::Unpin for Enum<T, U>
+    where
+        __Enum<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for Enum<T, U>
+    where
+        __Enum<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    impl<T, U> _pin_project::__private::Drop for Enum<T, U> {
+        fn drop(&mut self) {
+            unsafe {
+                let __pinned_self = _pin_project::__private::Pin::new_unchecked(self);
+                _pin_project::__private::PinnedDrop::drop(__pinned_self);
+            }
+        }
+    }
+};
+#[doc(hidden)]
+impl<T, U> ::pin_project::__private::PinnedDrop for Enum<T, U> {
+    unsafe fn drop(self: Pin<&mut Self>) {
+        #[allow(clippy::needless_pass_by_value)]
+        fn __drop_inner<T, U>(__self: Pin<&mut Enum<T, U>>) {
+            fn __drop_inner() {}
+            let _ = __self;
+        }
+        __drop_inner(self);
+    }
+}
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/pinned_drop/enum.rs b/third_party/rust/pin-project/tests/expand/pinned_drop/enum.rs
new file mode 100644
index 0000000000..c162ef6b2b
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/pinned_drop/enum.rs
@@ -0,0 +1,23 @@
+use std::pin::Pin;
+
+use pin_project::{pin_project, pinned_drop};
+
+#[pin_project(PinnedDrop, project = EnumProj, project_ref = EnumProjRef)]
+enum Enum<T, U> {
+    Struct {
+        #[pin]
+        pinned: T,
+        unpinned: U,
+    },
+    Tuple(#[pin] T, U),
+    Unit,
+}
+
+#[pinned_drop]
+impl<T, U> PinnedDrop for Enum<T, U> {
+    fn drop(self: Pin<&mut Self>) {
+        let _ = self;
+    }
+}
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/pinned_drop/struct.expanded.rs b/third_party/rust/pin-project/tests/expand/pinned_drop/struct.expanded.rs
new file mode 100644
index 0000000000..d21440d347
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/pinned_drop/struct.expanded.rs
@@ -0,0 +1,116 @@
+use std::pin::Pin;
+use pin_project::{pin_project, pinned_drop};
+#[pin(__private(PinnedDrop))]
+struct Struct<T, U> {
+    #[pin]
+    pinned: T,
+    unpinned: U,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    #[allow(dead_code)]
+    #[allow(clippy::mut_mut)]
+    struct __StructProjection<'pin, T, U>
+    where
+        Struct<T, U>: 'pin,
+    {
+        pinned: ::pin_project::__private::Pin<&'pin mut (T)>,
+        unpinned: &'pin mut (U),
+    }
+    #[allow(dead_code)]
+    #[allow(clippy::ref_option_ref)]
+    struct __StructProjectionRef<'pin, T, U>
+    where
+        Struct<T, U>: 'pin,
+    {
+        pinned: ::pin_project::__private::Pin<&'pin (T)>,
+        unpinned: &'pin (U),
+    }
+    impl<T, U> Struct<T, U> {
+        #[allow(dead_code)]
+        fn project<'pin>(
+            self: _pin_project::__private::Pin<&'pin mut Self>,
+        ) -> __StructProjection<'pin, T, U> {
+            unsafe {
+                let Self { pinned, unpinned } = self.get_unchecked_mut();
+                __StructProjection {
+                    pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                    unpinned,
+                }
+            }
+        }
+        #[allow(dead_code)]
+        #[allow(clippy::missing_const_for_fn)]
+        fn project_ref<'pin>(
+            self: _pin_project::__private::Pin<&'pin Self>,
+        ) -> __StructProjectionRef<'pin, T, U> {
+            unsafe {
+                let Self { pinned, unpinned } = self.get_ref();
+                __StructProjectionRef {
+                    pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                    unpinned,
+                }
+            }
+        }
+    }
+    #[forbid(unaligned_references, safe_packed_borrows)]
+    fn __assert_not_repr_packed<T, U>(this: &Struct<T, U>) {
+        let _ = &this.pinned;
+        let _ = &this.unpinned;
+    }
+    #[allow(missing_debug_implementations)]
+    struct __Struct<'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 Struct<T, U>
+    where
+        __Struct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for Struct<T, U>
+    where
+        __Struct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    impl<T, U> _pin_project::__private::Drop for Struct<T, U> {
+        fn drop(&mut self) {
+            unsafe {
+                let __pinned_self = _pin_project::__private::Pin::new_unchecked(self);
+                _pin_project::__private::PinnedDrop::drop(__pinned_self);
+            }
+        }
+    }
+};
+#[doc(hidden)]
+impl<T, U> ::pin_project::__private::PinnedDrop for Struct<T, U> {
+    unsafe fn drop(self: Pin<&mut Self>) {
+        #[allow(clippy::needless_pass_by_value)]
+        fn __drop_inner<T, U>(__self: Pin<&mut Struct<T, U>>) {
+            fn __drop_inner() {}
+            let _ = __self;
+        }
+        __drop_inner(self);
+    }
+}
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/pinned_drop/struct.rs b/third_party/rust/pin-project/tests/expand/pinned_drop/struct.rs
new file mode 100644
index 0000000000..691d3cb4a0
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/pinned_drop/struct.rs
@@ -0,0 +1,19 @@
+use std::pin::Pin;
+
+use pin_project::{pin_project, pinned_drop};
+
+#[pin_project(PinnedDrop)]
+struct Struct<T, U> {
+    #[pin]
+    pinned: T,
+    unpinned: U,
+}
+
+#[pinned_drop]
+impl<T, U> PinnedDrop for Struct<T, U> {
+    fn drop(self: Pin<&mut Self>) {
+        let _ = self;
+    }
+}
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/pinned_drop/tuple_struct.expanded.rs b/third_party/rust/pin-project/tests/expand/pinned_drop/tuple_struct.expanded.rs
new file mode 100644
index 0000000000..9a614ae551
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/pinned_drop/tuple_struct.expanded.rs
@@ -0,0 +1,110 @@
+use std::pin::Pin;
+use pin_project::{pin_project, pinned_drop};
+#[pin(__private(PinnedDrop))]
+struct TupleStruct<T, U>(#[pin] T, U);
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    #[allow(dead_code)]
+    #[allow(clippy::mut_mut)]
+    struct __TupleStructProjection<'pin, T, U>(
+        ::pin_project::__private::Pin<&'pin mut (T)>,
+        &'pin mut (U),
+    )
+    where
+        TupleStruct<T, U>: 'pin;
+    #[allow(dead_code)]
+    #[allow(clippy::ref_option_ref)]
+    struct __TupleStructProjectionRef<'pin, T, U>(
+        ::pin_project::__private::Pin<&'pin (T)>,
+        &'pin (U),
+    )
+    where
+        TupleStruct<T, U>: 'pin;
+    impl<T, U> TupleStruct<T, U> {
+        #[allow(dead_code)]
+        fn project<'pin>(
+            self: _pin_project::__private::Pin<&'pin mut Self>,
+        ) -> __TupleStructProjection<'pin, T, U> {
+            unsafe {
+                let Self(_0, _1) = self.get_unchecked_mut();
+                __TupleStructProjection(
+                    _pin_project::__private::Pin::new_unchecked(_0),
+                    _1,
+                )
+            }
+        }
+        #[allow(dead_code)]
+        #[allow(clippy::missing_const_for_fn)]
+        fn project_ref<'pin>(
+            self: _pin_project::__private::Pin<&'pin Self>,
+        ) -> __TupleStructProjectionRef<'pin, T, U> {
+            unsafe {
+                let Self(_0, _1) = self.get_ref();
+                __TupleStructProjectionRef(
+                    _pin_project::__private::Pin::new_unchecked(_0),
+                    _1,
+                )
+            }
+        }
+    }
+    #[forbid(unaligned_references, safe_packed_borrows)]
+    fn __assert_not_repr_packed<T, U>(this: &TupleStruct<T, U>) {
+        let _ = &this.0;
+        let _ = &this.1;
+    }
+    #[allow(missing_debug_implementations)]
+    struct __TupleStruct<'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 TupleStruct<T, U>
+    where
+        __TupleStruct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for TupleStruct<T, U>
+    where
+        __TupleStruct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    impl<T, U> _pin_project::__private::Drop for TupleStruct<T, U> {
+        fn drop(&mut self) {
+            unsafe {
+                let __pinned_self = _pin_project::__private::Pin::new_unchecked(self);
+                _pin_project::__private::PinnedDrop::drop(__pinned_self);
+            }
+        }
+    }
+};
+#[doc(hidden)]
+impl<T, U> ::pin_project::__private::PinnedDrop for TupleStruct<T, U> {
+    unsafe fn drop(self: Pin<&mut Self>) {
+        #[allow(clippy::needless_pass_by_value)]
+        fn __drop_inner<T, U>(__self: Pin<&mut TupleStruct<T, U>>) {
+            fn __drop_inner() {}
+            let _ = __self;
+        }
+        __drop_inner(self);
+    }
+}
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/pinned_drop/tuple_struct.rs b/third_party/rust/pin-project/tests/expand/pinned_drop/tuple_struct.rs
new file mode 100644
index 0000000000..1f4917c221
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/pinned_drop/tuple_struct.rs
@@ -0,0 +1,15 @@
+use std::pin::Pin;
+
+use pin_project::{pin_project, pinned_drop};
+
+#[pin_project(PinnedDrop)]
+struct TupleStruct<T, U>(#[pin] T, U);
+
+#[pinned_drop]
+impl<T, U> PinnedDrop for TupleStruct<T, U> {
+    fn drop(self: Pin<&mut Self>) {
+        let _ = self;
+    }
+}
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/project_replace/enum.expanded.rs b/third_party/rust/pin-project/tests/expand/project_replace/enum.expanded.rs
new file mode 100644
index 0000000000..178cb99758
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/project_replace/enum.expanded.rs
@@ -0,0 +1,119 @@
+use pin_project::pin_project;
+#[pin(__private(project_replace = EnumProjOwn))]
+enum Enum<T, U> {
+    Struct { #[pin] pinned: T, unpinned: U },
+    Tuple(#[pin] T, U),
+    Unit,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(dead_code)]
+#[allow(variant_size_differences)]
+#[allow(clippy::large_enum_variant)]
+enum EnumProjOwn<T, U> {
+    Struct { pinned: ::pin_project::__private::PhantomData<T>, unpinned: U },
+    Tuple(::pin_project::__private::PhantomData<T>, U),
+    Unit,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    impl<T, U> Enum<T, U> {
+        #[allow(dead_code)]
+        fn project_replace(
+            self: _pin_project::__private::Pin<&mut Self>,
+            __replacement: Self,
+        ) -> EnumProjOwn<T, U> {
+            unsafe {
+                let __self_ptr: *mut Self = self.get_unchecked_mut();
+                let __guard = _pin_project::__private::UnsafeOverwriteGuard::new(
+                    __self_ptr,
+                    __replacement,
+                );
+                match &mut *__self_ptr {
+                    Self::Struct { pinned, unpinned } => {
+                        let __result = EnumProjOwn::Struct {
+                            pinned: _pin_project::__private::PhantomData,
+                            unpinned: _pin_project::__private::ptr::read(unpinned),
+                        };
+                        {
+                            let __guard = _pin_project::__private::UnsafeDropInPlaceGuard::new(
+                                pinned,
+                            );
+                        }
+                        __result
+                    }
+                    Self::Tuple(_0, _1) => {
+                        let __result = EnumProjOwn::Tuple(
+                            _pin_project::__private::PhantomData,
+                            _pin_project::__private::ptr::read(_1),
+                        );
+                        {
+                            let __guard = _pin_project::__private::UnsafeDropInPlaceGuard::new(
+                                _0,
+                            );
+                        }
+                        __result
+                    }
+                    Self::Unit => {
+                        let __result = EnumProjOwn::Unit;
+                        {}
+                        __result
+                    }
+                }
+            }
+        }
+    }
+    #[allow(missing_debug_implementations)]
+    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,
+        __field1: T,
+    }
+    impl<'pin, T, U> _pin_project::__private::Unpin for Enum<T, U>
+    where
+        __Enum<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for Enum<T, U>
+    where
+        __Enum<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    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> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for Enum<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/project_replace/enum.rs b/third_party/rust/pin-project/tests/expand/project_replace/enum.rs
new file mode 100644
index 0000000000..d737f649bf
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/project_replace/enum.rs
@@ -0,0 +1,14 @@
+use pin_project::pin_project;
+
+#[pin_project(project_replace = EnumProjOwn)]
+enum Enum<T, U> {
+    Struct {
+        #[pin]
+        pinned: T,
+        unpinned: U,
+    },
+    Tuple(#[pin] T, U),
+    Unit,
+}
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/project_replace/struct.expanded.rs b/third_party/rust/pin-project/tests/expand/project_replace/struct.expanded.rs
new file mode 100644
index 0000000000..45839a2857
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/project_replace/struct.expanded.rs
@@ -0,0 +1,133 @@
+use pin_project::pin_project;
+#[pin(__private(project_replace))]
+struct Struct<T, U> {
+    #[pin]
+    pinned: T,
+    unpinned: U,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    #[allow(dead_code)]
+    #[allow(clippy::mut_mut)]
+    struct __StructProjection<'pin, T, U>
+    where
+        Struct<T, U>: 'pin,
+    {
+        pinned: ::pin_project::__private::Pin<&'pin mut (T)>,
+        unpinned: &'pin mut (U),
+    }
+    #[allow(dead_code)]
+    #[allow(clippy::ref_option_ref)]
+    struct __StructProjectionRef<'pin, T, U>
+    where
+        Struct<T, U>: 'pin,
+    {
+        pinned: ::pin_project::__private::Pin<&'pin (T)>,
+        unpinned: &'pin (U),
+    }
+    #[allow(dead_code)]
+    struct __StructProjectionOwned<T, U> {
+        pinned: ::pin_project::__private::PhantomData<T>,
+        unpinned: U,
+    }
+    impl<T, U> Struct<T, U> {
+        #[allow(dead_code)]
+        fn project<'pin>(
+            self: _pin_project::__private::Pin<&'pin mut Self>,
+        ) -> __StructProjection<'pin, T, U> {
+            unsafe {
+                let Self { pinned, unpinned } = self.get_unchecked_mut();
+                __StructProjection {
+                    pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                    unpinned,
+                }
+            }
+        }
+        #[allow(dead_code)]
+        #[allow(clippy::missing_const_for_fn)]
+        fn project_ref<'pin>(
+            self: _pin_project::__private::Pin<&'pin Self>,
+        ) -> __StructProjectionRef<'pin, T, U> {
+            unsafe {
+                let Self { pinned, unpinned } = self.get_ref();
+                __StructProjectionRef {
+                    pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                    unpinned,
+                }
+            }
+        }
+        #[allow(dead_code)]
+        fn project_replace(
+            self: _pin_project::__private::Pin<&mut Self>,
+            __replacement: Self,
+        ) -> __StructProjectionOwned<T, U> {
+            unsafe {
+                let __self_ptr: *mut Self = self.get_unchecked_mut();
+                let __guard = _pin_project::__private::UnsafeOverwriteGuard::new(
+                    __self_ptr,
+                    __replacement,
+                );
+                let Self { pinned, unpinned } = &mut *__self_ptr;
+                let __result = __StructProjectionOwned {
+                    pinned: _pin_project::__private::PhantomData,
+                    unpinned: _pin_project::__private::ptr::read(unpinned),
+                };
+                {
+                    let __guard = _pin_project::__private::UnsafeDropInPlaceGuard::new(
+                        pinned,
+                    );
+                }
+                __result
+            }
+        }
+    }
+    #[forbid(unaligned_references, safe_packed_borrows)]
+    fn __assert_not_repr_packed<T, U>(this: &Struct<T, U>) {
+        let _ = &this.pinned;
+        let _ = &this.unpinned;
+    }
+    #[allow(missing_debug_implementations)]
+    struct __Struct<'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 Struct<T, U>
+    where
+        __Struct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for Struct<T, U>
+    where
+        __Struct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    trait StructMustNotImplDrop {}
+    #[allow(clippy::drop_bounds, drop_bounds)]
+    impl<T: _pin_project::__private::Drop> StructMustNotImplDrop for T {}
+    impl<T, U> StructMustNotImplDrop for Struct<T, U> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for Struct<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/project_replace/struct.rs b/third_party/rust/pin-project/tests/expand/project_replace/struct.rs
new file mode 100644
index 0000000000..5865526a58
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/project_replace/struct.rs
@@ -0,0 +1,10 @@
+use pin_project::pin_project;
+
+#[pin_project(project_replace)]
+struct Struct<T, U> {
+    #[pin]
+    pinned: T,
+    unpinned: U,
+}
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/project_replace/tuple_struct.expanded.rs b/third_party/rust/pin-project/tests/expand/project_replace/tuple_struct.expanded.rs
new file mode 100644
index 0000000000..cdee3d149e
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/project_replace/tuple_struct.expanded.rs
@@ -0,0 +1,127 @@
+use pin_project::pin_project;
+#[pin(__private(project_replace))]
+struct TupleStruct<T, U>(#[pin] T, U);
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    #[allow(dead_code)]
+    #[allow(clippy::mut_mut)]
+    struct __TupleStructProjection<'pin, T, U>(
+        ::pin_project::__private::Pin<&'pin mut (T)>,
+        &'pin mut (U),
+    )
+    where
+        TupleStruct<T, U>: 'pin;
+    #[allow(dead_code)]
+    #[allow(clippy::ref_option_ref)]
+    struct __TupleStructProjectionRef<'pin, T, U>(
+        ::pin_project::__private::Pin<&'pin (T)>,
+        &'pin (U),
+    )
+    where
+        TupleStruct<T, U>: 'pin;
+    #[allow(dead_code)]
+    struct __TupleStructProjectionOwned<T, U>(
+        ::pin_project::__private::PhantomData<T>,
+        U,
+    );
+    impl<T, U> TupleStruct<T, U> {
+        #[allow(dead_code)]
+        fn project<'pin>(
+            self: _pin_project::__private::Pin<&'pin mut Self>,
+        ) -> __TupleStructProjection<'pin, T, U> {
+            unsafe {
+                let Self(_0, _1) = self.get_unchecked_mut();
+                __TupleStructProjection(
+                    _pin_project::__private::Pin::new_unchecked(_0),
+                    _1,
+                )
+            }
+        }
+        #[allow(dead_code)]
+        #[allow(clippy::missing_const_for_fn)]
+        fn project_ref<'pin>(
+            self: _pin_project::__private::Pin<&'pin Self>,
+        ) -> __TupleStructProjectionRef<'pin, T, U> {
+            unsafe {
+                let Self(_0, _1) = self.get_ref();
+                __TupleStructProjectionRef(
+                    _pin_project::__private::Pin::new_unchecked(_0),
+                    _1,
+                )
+            }
+        }
+        #[allow(dead_code)]
+        fn project_replace(
+            self: _pin_project::__private::Pin<&mut Self>,
+            __replacement: Self,
+        ) -> __TupleStructProjectionOwned<T, U> {
+            unsafe {
+                let __self_ptr: *mut Self = self.get_unchecked_mut();
+                let __guard = _pin_project::__private::UnsafeOverwriteGuard::new(
+                    __self_ptr,
+                    __replacement,
+                );
+                let Self(_0, _1) = &mut *__self_ptr;
+                let __result = __TupleStructProjectionOwned(
+                    _pin_project::__private::PhantomData,
+                    _pin_project::__private::ptr::read(_1),
+                );
+                {
+                    let __guard = _pin_project::__private::UnsafeDropInPlaceGuard::new(
+                        _0,
+                    );
+                }
+                __result
+            }
+        }
+    }
+    #[forbid(unaligned_references, safe_packed_borrows)]
+    fn __assert_not_repr_packed<T, U>(this: &TupleStruct<T, U>) {
+        let _ = &this.0;
+        let _ = &this.1;
+    }
+    #[allow(missing_debug_implementations)]
+    struct __TupleStruct<'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 TupleStruct<T, U>
+    where
+        __TupleStruct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for TupleStruct<T, U>
+    where
+        __TupleStruct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    trait TupleStructMustNotImplDrop {}
+    #[allow(clippy::drop_bounds, drop_bounds)]
+    impl<T: _pin_project::__private::Drop> TupleStructMustNotImplDrop for T {}
+    impl<T, U> TupleStructMustNotImplDrop for TupleStruct<T, U> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for TupleStruct<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/project_replace/tuple_struct.rs b/third_party/rust/pin-project/tests/expand/project_replace/tuple_struct.rs
new file mode 100644
index 0000000000..c4d05f5faa
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/project_replace/tuple_struct.rs
@@ -0,0 +1,6 @@
+use pin_project::pin_project;
+
+#[pin_project(project_replace)]
+struct TupleStruct<T, U>(#[pin] T, U);
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/pub/enum.expanded.rs b/third_party/rust/pin-project/tests/expand/pub/enum.expanded.rs
new file mode 100644
index 0000000000..90be268005
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/pub/enum.expanded.rs
@@ -0,0 +1,145 @@
+use pin_project::pin_project;
+#[pin(__private(project = EnumProj, project_ref = EnumProjRef))]
+pub enum Enum<T, U> {
+    Struct { #[pin] pinned: T, unpinned: U },
+    Tuple(#[pin] T, U),
+    Unit,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(dead_code)]
+#[allow(clippy::mut_mut)]
+pub(crate) enum EnumProj<'pin, T, U>
+where
+    Enum<T, U>: 'pin,
+{
+    Struct {
+        pinned: ::pin_project::__private::Pin<&'pin mut (T)>,
+        unpinned: &'pin mut (U),
+    },
+    Tuple(::pin_project::__private::Pin<&'pin mut (T)>, &'pin mut (U)),
+    Unit,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(dead_code)]
+#[allow(clippy::ref_option_ref)]
+pub(crate) enum EnumProjRef<'pin, T, U>
+where
+    Enum<T, U>: 'pin,
+{
+    Struct { pinned: ::pin_project::__private::Pin<&'pin (T)>, unpinned: &'pin (U) },
+    Tuple(::pin_project::__private::Pin<&'pin (T)>, &'pin (U)),
+    Unit,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    impl<T, U> Enum<T, U> {
+        #[allow(dead_code)]
+        pub(crate) fn project<'pin>(
+            self: _pin_project::__private::Pin<&'pin mut Self>,
+        ) -> EnumProj<'pin, T, U> {
+            unsafe {
+                match self.get_unchecked_mut() {
+                    Self::Struct { pinned, unpinned } => {
+                        EnumProj::Struct {
+                            pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                            unpinned,
+                        }
+                    }
+                    Self::Tuple(_0, _1) => {
+                        EnumProj::Tuple(
+                            _pin_project::__private::Pin::new_unchecked(_0),
+                            _1,
+                        )
+                    }
+                    Self::Unit => EnumProj::Unit,
+                }
+            }
+        }
+        #[allow(dead_code)]
+        #[allow(clippy::missing_const_for_fn)]
+        pub(crate) fn project_ref<'pin>(
+            self: _pin_project::__private::Pin<&'pin Self>,
+        ) -> EnumProjRef<'pin, T, U> {
+            unsafe {
+                match self.get_ref() {
+                    Self::Struct { pinned, unpinned } => {
+                        EnumProjRef::Struct {
+                            pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                            unpinned,
+                        }
+                    }
+                    Self::Tuple(_0, _1) => {
+                        EnumProjRef::Tuple(
+                            _pin_project::__private::Pin::new_unchecked(_0),
+                            _1,
+                        )
+                    }
+                    Self::Unit => EnumProjRef::Unit,
+                }
+            }
+        }
+    }
+    #[allow(missing_debug_implementations)]
+    pub 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,
+        __field1: T,
+    }
+    impl<'pin, T, U> _pin_project::__private::Unpin for Enum<T, U>
+    where
+        __Enum<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for Enum<T, U>
+    where
+        __Enum<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    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> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for Enum<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/pub/enum.rs b/third_party/rust/pin-project/tests/expand/pub/enum.rs
new file mode 100644
index 0000000000..7c8577fd1b
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/pub/enum.rs
@@ -0,0 +1,14 @@
+use pin_project::pin_project;
+
+#[pin_project(project = EnumProj, project_ref = EnumProjRef)]
+pub enum Enum<T, U> {
+    Struct {
+        #[pin]
+        pinned: T,
+        unpinned: U,
+    },
+    Tuple(#[pin] T, U),
+    Unit,
+}
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/pub/struct.expanded.rs b/third_party/rust/pin-project/tests/expand/pub/struct.expanded.rs
new file mode 100644
index 0000000000..ca31f3d768
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/pub/struct.expanded.rs
@@ -0,0 +1,104 @@
+use pin_project::pin_project;
+#[pin(__private())]
+pub struct Struct<T, U> {
+    #[pin]
+    pub pinned: T,
+    pub unpinned: U,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    #[allow(dead_code)]
+    #[allow(clippy::mut_mut)]
+    pub(crate) struct __StructProjection<'pin, T, U>
+    where
+        Struct<T, U>: 'pin,
+    {
+        pub pinned: ::pin_project::__private::Pin<&'pin mut (T)>,
+        pub unpinned: &'pin mut (U),
+    }
+    #[allow(dead_code)]
+    #[allow(clippy::ref_option_ref)]
+    pub(crate) struct __StructProjectionRef<'pin, T, U>
+    where
+        Struct<T, U>: 'pin,
+    {
+        pub pinned: ::pin_project::__private::Pin<&'pin (T)>,
+        pub unpinned: &'pin (U),
+    }
+    impl<T, U> Struct<T, U> {
+        #[allow(dead_code)]
+        pub(crate) fn project<'pin>(
+            self: _pin_project::__private::Pin<&'pin mut Self>,
+        ) -> __StructProjection<'pin, T, U> {
+            unsafe {
+                let Self { pinned, unpinned } = self.get_unchecked_mut();
+                __StructProjection {
+                    pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                    unpinned,
+                }
+            }
+        }
+        #[allow(dead_code)]
+        #[allow(clippy::missing_const_for_fn)]
+        pub(crate) fn project_ref<'pin>(
+            self: _pin_project::__private::Pin<&'pin Self>,
+        ) -> __StructProjectionRef<'pin, T, U> {
+            unsafe {
+                let Self { pinned, unpinned } = self.get_ref();
+                __StructProjectionRef {
+                    pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                    unpinned,
+                }
+            }
+        }
+    }
+    #[forbid(unaligned_references, safe_packed_borrows)]
+    fn __assert_not_repr_packed<T, U>(this: &Struct<T, U>) {
+        let _ = &this.pinned;
+        let _ = &this.unpinned;
+    }
+    #[allow(missing_debug_implementations)]
+    pub struct __Struct<'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 Struct<T, U>
+    where
+        __Struct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for Struct<T, U>
+    where
+        __Struct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    trait StructMustNotImplDrop {}
+    #[allow(clippy::drop_bounds, drop_bounds)]
+    impl<T: _pin_project::__private::Drop> StructMustNotImplDrop for T {}
+    impl<T, U> StructMustNotImplDrop for Struct<T, U> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for Struct<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/pub/struct.rs b/third_party/rust/pin-project/tests/expand/pub/struct.rs
new file mode 100644
index 0000000000..f50d1e9272
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/pub/struct.rs
@@ -0,0 +1,10 @@
+use pin_project::pin_project;
+
+#[pin_project]
+pub struct Struct<T, U> {
+    #[pin]
+    pub pinned: T,
+    pub unpinned: U,
+}
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/pub/tuple_struct.expanded.rs b/third_party/rust/pin-project/tests/expand/pub/tuple_struct.expanded.rs
new file mode 100644
index 0000000000..5c7efbf23d
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/pub/tuple_struct.expanded.rs
@@ -0,0 +1,98 @@
+use pin_project::pin_project;
+#[pin(__private())]
+pub struct TupleStruct<T, U>(#[pin] pub T, pub U);
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    #[allow(dead_code)]
+    #[allow(clippy::mut_mut)]
+    pub(crate) struct __TupleStructProjection<'pin, T, U>(
+        pub ::pin_project::__private::Pin<&'pin mut (T)>,
+        pub &'pin mut (U),
+    )
+    where
+        TupleStruct<T, U>: 'pin;
+    #[allow(dead_code)]
+    #[allow(clippy::ref_option_ref)]
+    pub(crate) struct __TupleStructProjectionRef<'pin, T, U>(
+        pub ::pin_project::__private::Pin<&'pin (T)>,
+        pub &'pin (U),
+    )
+    where
+        TupleStruct<T, U>: 'pin;
+    impl<T, U> TupleStruct<T, U> {
+        #[allow(dead_code)]
+        pub(crate) fn project<'pin>(
+            self: _pin_project::__private::Pin<&'pin mut Self>,
+        ) -> __TupleStructProjection<'pin, T, U> {
+            unsafe {
+                let Self(_0, _1) = self.get_unchecked_mut();
+                __TupleStructProjection(
+                    _pin_project::__private::Pin::new_unchecked(_0),
+                    _1,
+                )
+            }
+        }
+        #[allow(dead_code)]
+        #[allow(clippy::missing_const_for_fn)]
+        pub(crate) fn project_ref<'pin>(
+            self: _pin_project::__private::Pin<&'pin Self>,
+        ) -> __TupleStructProjectionRef<'pin, T, U> {
+            unsafe {
+                let Self(_0, _1) = self.get_ref();
+                __TupleStructProjectionRef(
+                    _pin_project::__private::Pin::new_unchecked(_0),
+                    _1,
+                )
+            }
+        }
+    }
+    #[forbid(unaligned_references, safe_packed_borrows)]
+    fn __assert_not_repr_packed<T, U>(this: &TupleStruct<T, U>) {
+        let _ = &this.0;
+        let _ = &this.1;
+    }
+    #[allow(missing_debug_implementations)]
+    pub struct __TupleStruct<'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 TupleStruct<T, U>
+    where
+        __TupleStruct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    #[doc(hidden)]
+    unsafe impl<'pin, T, U> _pin_project::UnsafeUnpin for TupleStruct<T, U>
+    where
+        __TupleStruct<'pin, T, U>: _pin_project::__private::Unpin,
+    {}
+    trait TupleStructMustNotImplDrop {}
+    #[allow(clippy::drop_bounds, drop_bounds)]
+    impl<T: _pin_project::__private::Drop> TupleStructMustNotImplDrop for T {}
+    impl<T, U> TupleStructMustNotImplDrop for TupleStruct<T, U> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for TupleStruct<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/pub/tuple_struct.rs b/third_party/rust/pin-project/tests/expand/pub/tuple_struct.rs
new file mode 100644
index 0000000000..5756aafcc8
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/pub/tuple_struct.rs
@@ -0,0 +1,6 @@
+use pin_project::pin_project;
+
+#[pin_project]
+pub struct TupleStruct<T, U>(#[pin] pub T, pub U);
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/unsafe_unpin/enum.expanded.rs b/third_party/rust/pin-project/tests/expand/unsafe_unpin/enum.expanded.rs
new file mode 100644
index 0000000000..1f88cccae6
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/unsafe_unpin/enum.expanded.rs
@@ -0,0 +1,129 @@
+use pin_project::{pin_project, UnsafeUnpin};
+#[pin(__private(UnsafeUnpin, project = EnumProj, project_ref = EnumProjRef))]
+enum Enum<T, U> {
+    Struct { #[pin] pinned: T, unpinned: U },
+    Tuple(#[pin] T, U),
+    Unit,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(dead_code)]
+#[allow(clippy::mut_mut)]
+enum EnumProj<'pin, T, U>
+where
+    Enum<T, U>: 'pin,
+{
+    Struct {
+        pinned: ::pin_project::__private::Pin<&'pin mut (T)>,
+        unpinned: &'pin mut (U),
+    },
+    Tuple(::pin_project::__private::Pin<&'pin mut (T)>, &'pin mut (U)),
+    Unit,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(dead_code)]
+#[allow(clippy::ref_option_ref)]
+enum EnumProjRef<'pin, T, U>
+where
+    Enum<T, U>: 'pin,
+{
+    Struct { pinned: ::pin_project::__private::Pin<&'pin (T)>, unpinned: &'pin (U) },
+    Tuple(::pin_project::__private::Pin<&'pin (T)>, &'pin (U)),
+    Unit,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    impl<T, U> Enum<T, U> {
+        #[allow(dead_code)]
+        fn project<'pin>(
+            self: _pin_project::__private::Pin<&'pin mut Self>,
+        ) -> EnumProj<'pin, T, U> {
+            unsafe {
+                match self.get_unchecked_mut() {
+                    Self::Struct { pinned, unpinned } => {
+                        EnumProj::Struct {
+                            pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                            unpinned,
+                        }
+                    }
+                    Self::Tuple(_0, _1) => {
+                        EnumProj::Tuple(
+                            _pin_project::__private::Pin::new_unchecked(_0),
+                            _1,
+                        )
+                    }
+                    Self::Unit => EnumProj::Unit,
+                }
+            }
+        }
+        #[allow(dead_code)]
+        #[allow(clippy::missing_const_for_fn)]
+        fn project_ref<'pin>(
+            self: _pin_project::__private::Pin<&'pin Self>,
+        ) -> EnumProjRef<'pin, T, U> {
+            unsafe {
+                match self.get_ref() {
+                    Self::Struct { pinned, unpinned } => {
+                        EnumProjRef::Struct {
+                            pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                            unpinned,
+                        }
+                    }
+                    Self::Tuple(_0, _1) => {
+                        EnumProjRef::Tuple(
+                            _pin_project::__private::Pin::new_unchecked(_0),
+                            _1,
+                        )
+                    }
+                    Self::Unit => EnumProjRef::Unit,
+                }
+            }
+        }
+    }
+    impl<'pin, T, U> _pin_project::__private::Unpin for Enum<T, U>
+    where
+        _pin_project::__private::Wrapper<'pin, Self>: _pin_project::UnsafeUnpin,
+    {}
+    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> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for Enum<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+unsafe impl<T: Unpin, U> UnsafeUnpin for Enum<T, U> {}
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/unsafe_unpin/enum.rs b/third_party/rust/pin-project/tests/expand/unsafe_unpin/enum.rs
new file mode 100644
index 0000000000..d368d7132b
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/unsafe_unpin/enum.rs
@@ -0,0 +1,16 @@
+use pin_project::{pin_project, UnsafeUnpin};
+
+#[pin_project(UnsafeUnpin, project = EnumProj, project_ref = EnumProjRef)]
+enum Enum<T, U> {
+    Struct {
+        #[pin]
+        pinned: T,
+        unpinned: U,
+    },
+    Tuple(#[pin] T, U),
+    Unit,
+}
+
+unsafe impl<T: Unpin, U> UnsafeUnpin for Enum<T, U> {}
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/unsafe_unpin/struct.expanded.rs b/third_party/rust/pin-project/tests/expand/unsafe_unpin/struct.expanded.rs
new file mode 100644
index 0000000000..5fa7271572
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/unsafe_unpin/struct.expanded.rs
@@ -0,0 +1,89 @@
+use pin_project::{pin_project, UnsafeUnpin};
+#[pin(__private(UnsafeUnpin))]
+struct Struct<T, U> {
+    #[pin]
+    pinned: T,
+    unpinned: U,
+}
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    #[allow(dead_code)]
+    #[allow(clippy::mut_mut)]
+    struct __StructProjection<'pin, T, U>
+    where
+        Struct<T, U>: 'pin,
+    {
+        pinned: ::pin_project::__private::Pin<&'pin mut (T)>,
+        unpinned: &'pin mut (U),
+    }
+    #[allow(dead_code)]
+    #[allow(clippy::ref_option_ref)]
+    struct __StructProjectionRef<'pin, T, U>
+    where
+        Struct<T, U>: 'pin,
+    {
+        pinned: ::pin_project::__private::Pin<&'pin (T)>,
+        unpinned: &'pin (U),
+    }
+    impl<T, U> Struct<T, U> {
+        #[allow(dead_code)]
+        fn project<'pin>(
+            self: _pin_project::__private::Pin<&'pin mut Self>,
+        ) -> __StructProjection<'pin, T, U> {
+            unsafe {
+                let Self { pinned, unpinned } = self.get_unchecked_mut();
+                __StructProjection {
+                    pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                    unpinned,
+                }
+            }
+        }
+        #[allow(dead_code)]
+        #[allow(clippy::missing_const_for_fn)]
+        fn project_ref<'pin>(
+            self: _pin_project::__private::Pin<&'pin Self>,
+        ) -> __StructProjectionRef<'pin, T, U> {
+            unsafe {
+                let Self { pinned, unpinned } = self.get_ref();
+                __StructProjectionRef {
+                    pinned: _pin_project::__private::Pin::new_unchecked(pinned),
+                    unpinned,
+                }
+            }
+        }
+    }
+    #[forbid(unaligned_references, safe_packed_borrows)]
+    fn __assert_not_repr_packed<T, U>(this: &Struct<T, U>) {
+        let _ = &this.pinned;
+        let _ = &this.unpinned;
+    }
+    impl<'pin, T, U> _pin_project::__private::Unpin for Struct<T, U>
+    where
+        _pin_project::__private::Wrapper<'pin, Self>: _pin_project::UnsafeUnpin,
+    {}
+    trait StructMustNotImplDrop {}
+    #[allow(clippy::drop_bounds, drop_bounds)]
+    impl<T: _pin_project::__private::Drop> StructMustNotImplDrop for T {}
+    impl<T, U> StructMustNotImplDrop for Struct<T, U> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for Struct<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+unsafe impl<T: Unpin, U> UnsafeUnpin for Struct<T, U> {}
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/unsafe_unpin/struct.rs b/third_party/rust/pin-project/tests/expand/unsafe_unpin/struct.rs
new file mode 100644
index 0000000000..b0851b1ad6
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/unsafe_unpin/struct.rs
@@ -0,0 +1,12 @@
+use pin_project::{pin_project, UnsafeUnpin};
+
+#[pin_project(UnsafeUnpin)]
+struct Struct<T, U> {
+    #[pin]
+    pinned: T,
+    unpinned: U,
+}
+
+unsafe impl<T: Unpin, U> UnsafeUnpin for Struct<T, U> {}
+
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/unsafe_unpin/tuple_struct.expanded.rs b/third_party/rust/pin-project/tests/expand/unsafe_unpin/tuple_struct.expanded.rs
new file mode 100644
index 0000000000..de4e9269cb
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/unsafe_unpin/tuple_struct.expanded.rs
@@ -0,0 +1,83 @@
+use pin_project::{pin_project, UnsafeUnpin};
+#[pin(__private(UnsafeUnpin))]
+struct TupleStruct<T, U>(#[pin] T, U);
+#[allow(box_pointers)]
+#[allow(deprecated)]
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(unreachable_pub)]
+#[allow(unused_tuple_struct_fields)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::pattern_type_mismatch)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+#[allow(unused_qualifications)]
+#[allow(clippy::semicolon_if_nothing_returned)]
+#[allow(clippy::use_self)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+    #[allow(unused_extern_crates)]
+    extern crate pin_project as _pin_project;
+    #[allow(dead_code)]
+    #[allow(clippy::mut_mut)]
+    struct __TupleStructProjection<'pin, T, U>(
+        ::pin_project::__private::Pin<&'pin mut (T)>,
+        &'pin mut (U),
+    )
+    where
+        TupleStruct<T, U>: 'pin;
+    #[allow(dead_code)]
+    #[allow(clippy::ref_option_ref)]
+    struct __TupleStructProjectionRef<'pin, T, U>(
+        ::pin_project::__private::Pin<&'pin (T)>,
+        &'pin (U),
+    )
+    where
+        TupleStruct<T, U>: 'pin;
+    impl<T, U> TupleStruct<T, U> {
+        #[allow(dead_code)]
+        fn project<'pin>(
+            self: _pin_project::__private::Pin<&'pin mut Self>,
+        ) -> __TupleStructProjection<'pin, T, U> {
+            unsafe {
+                let Self(_0, _1) = self.get_unchecked_mut();
+                __TupleStructProjection(
+                    _pin_project::__private::Pin::new_unchecked(_0),
+                    _1,
+                )
+            }
+        }
+        #[allow(dead_code)]
+        #[allow(clippy::missing_const_for_fn)]
+        fn project_ref<'pin>(
+            self: _pin_project::__private::Pin<&'pin Self>,
+        ) -> __TupleStructProjectionRef<'pin, T, U> {
+            unsafe {
+                let Self(_0, _1) = self.get_ref();
+                __TupleStructProjectionRef(
+                    _pin_project::__private::Pin::new_unchecked(_0),
+                    _1,
+                )
+            }
+        }
+    }
+    #[forbid(unaligned_references, safe_packed_borrows)]
+    fn __assert_not_repr_packed<T, U>(this: &TupleStruct<T, U>) {
+        let _ = &this.0;
+        let _ = &this.1;
+    }
+    impl<'pin, T, U> _pin_project::__private::Unpin for TupleStruct<T, U>
+    where
+        _pin_project::__private::Wrapper<'pin, Self>: _pin_project::UnsafeUnpin,
+    {}
+    trait TupleStructMustNotImplDrop {}
+    #[allow(clippy::drop_bounds, drop_bounds)]
+    impl<T: _pin_project::__private::Drop> TupleStructMustNotImplDrop for T {}
+    impl<T, U> TupleStructMustNotImplDrop for TupleStruct<T, U> {}
+    #[doc(hidden)]
+    impl<T, U> _pin_project::__private::PinnedDrop for TupleStruct<T, U> {
+        unsafe fn drop(self: _pin_project::__private::Pin<&mut Self>) {}
+    }
+};
+unsafe impl<T: Unpin, U> UnsafeUnpin for Struct<T, U> {}
+fn main() {}
diff --git a/third_party/rust/pin-project/tests/expand/unsafe_unpin/tuple_struct.rs b/third_party/rust/pin-project/tests/expand/unsafe_unpin/tuple_struct.rs
new file mode 100644
index 0000000000..964617a1c9
--- /dev/null
+++ b/third_party/rust/pin-project/tests/expand/unsafe_unpin/tuple_struct.rs
@@ -0,0 +1,8 @@
+use pin_project::{pin_project, UnsafeUnpin};
+
+#[pin_project(UnsafeUnpin)]
+struct TupleStruct<T, U>(#[pin] T, U);
+
+unsafe impl<T: Unpin, U> UnsafeUnpin for Struct<T, U> {}
+
+fn main() {}