Tag relevant functions with #[rustc_as_ptr] attribute

Author: gavincrawford

Diff for: alloc/src/boxed.rs

@@ -1499,6 +1499,7 @@ impl<T: ?Sized, A: Allocator> Box<T, A> {
     /// [`as_ptr`]: Self::as_ptr
     #[unstable(feature = "box_as_ptr", issue = "129090")]
     #[rustc_never_returns_null_ptr]
+    #[cfg_attr(not(bootstrap), rustc_as_ptr)]
     #[inline]
     pub fn as_mut_ptr(b: &mut Self) -> *mut T {
         // This is a primitive deref, not going through `DerefMut`, and therefore not materializing
@@ -1547,6 +1548,7 @@ impl<T: ?Sized, A: Allocator> Box<T, A> {
     /// [`as_ptr`]: Self::as_ptr
     #[unstable(feature = "box_as_ptr", issue = "129090")]
     #[rustc_never_returns_null_ptr]
+    #[cfg_attr(not(bootstrap), rustc_as_ptr)]
     #[inline]
     pub fn as_ptr(b: &Self) -> *const T {
         // This is a primitive deref, not going through `DerefMut`, and therefore not materializing

Diff for: alloc/src/vec/mod.rs

@@ -1662,6 +1662,7 @@ impl<T, A: Allocator> Vec<T, A> {
     #[stable(feature = "vec_as_ptr", since = "1.37.0")]
     #[rustc_const_unstable(feature = "const_vec_string_slice", issue = "129041")]
     #[rustc_never_returns_null_ptr]
+    #[cfg_attr(not(bootstrap), rustc_as_ptr)]
     #[inline]
     pub const fn as_ptr(&self) -> *const T {
         // We shadow the slice method of the same name to avoid going through
@@ -1724,6 +1725,7 @@ impl<T, A: Allocator> Vec<T, A> {
     #[stable(feature = "vec_as_ptr", since = "1.37.0")]
     #[rustc_const_unstable(feature = "const_vec_string_slice", issue = "129041")]
     #[rustc_never_returns_null_ptr]
+    #[cfg_attr(not(bootstrap), rustc_as_ptr)]
     #[inline]
     pub const fn as_mut_ptr(&mut self) -> *mut T {
         // We shadow the slice method of the same name to avoid going through

Diff for: core/src/cell.rs

@@ -587,6 +587,7 @@ impl<T: ?Sized> Cell<T> {
     #[inline]
     #[stable(feature = "cell_as_ptr", since = "1.12.0")]
     #[rustc_const_stable(feature = "const_cell_as_ptr", since = "1.32.0")]
+    #[cfg_attr(not(bootstrap), rustc_as_ptr)]
     #[rustc_never_returns_null_ptr]
     pub const fn as_ptr(&self) -> *mut T {
         self.value.get()
@@ -1149,6 +1150,7 @@ impl<T: ?Sized> RefCell<T> {
     /// ```
     #[inline]
     #[stable(feature = "cell_as_ptr", since = "1.12.0")]
+    #[cfg_attr(not(bootstrap), rustc_as_ptr)]
     #[rustc_never_returns_null_ptr]
     pub fn as_ptr(&self) -> *mut T {
         self.value.get()
@@ -2157,6 +2159,7 @@ impl<T: ?Sized> UnsafeCell<T> {
     #[inline(always)]
     #[stable(feature = "rust1", since = "1.0.0")]
     #[rustc_const_stable(feature = "const_unsafecell_get", since = "1.32.0")]
+    #[cfg_attr(not(bootstrap), rustc_as_ptr)]
     #[rustc_never_returns_null_ptr]
     pub const fn get(&self) -> *mut T {
         // We can just cast the pointer from `UnsafeCell<T>` to `T` because of
@@ -2303,6 +2306,7 @@ impl<T: ?Sized> SyncUnsafeCell<T> {
     /// when casting to `&mut T`, and ensure that there are no mutations
     /// or mutable aliases going on when casting to `&T`
     #[inline]
+    #[cfg_attr(not(bootstrap), rustc_as_ptr)]
     #[rustc_never_returns_null_ptr]
     pub const fn get(&self) -> *mut T {
         self.value.get()

Diff for: core/src/ffi/c_str.rs

@@ -501,6 +501,7 @@ impl CStr {
     #[must_use]
     #[stable(feature = "rust1", since = "1.0.0")]
     #[rustc_const_stable(feature = "const_str_as_ptr", since = "1.32.0")]
+    #[cfg_attr(not(bootstrap), rustc_as_ptr)]
     #[rustc_never_returns_null_ptr]
     pub const fn as_ptr(&self) -> *const c_char {
         self.inner.as_ptr()

Diff for: core/src/mem/maybe_uninit.rs

@@ -529,6 +529,7 @@ impl<T> MaybeUninit<T> {
     /// until they are, it is advisable to avoid them.)
     #[stable(feature = "maybe_uninit", since = "1.36.0")]
     #[rustc_const_stable(feature = "const_maybe_uninit_as_ptr", since = "1.59.0")]
+    #[cfg_attr(not(bootstrap), rustc_as_ptr)]
     #[inline(always)]
     pub const fn as_ptr(&self) -> *const T {
         // `MaybeUninit` and `ManuallyDrop` are both `repr(transparent)` so we can cast the pointer.
@@ -570,6 +571,7 @@ impl<T> MaybeUninit<T> {
     /// until they are, it is advisable to avoid them.)
     #[stable(feature = "maybe_uninit", since = "1.36.0")]
     #[rustc_const_stable(feature = "const_maybe_uninit_as_mut_ptr", since = "1.83.0")]
+    #[cfg_attr(not(bootstrap), rustc_as_ptr)]
     #[inline(always)]
     pub const fn as_mut_ptr(&mut self) -> *mut T {
         // `MaybeUninit` and `ManuallyDrop` are both `repr(transparent)` so we can cast the pointer.

Diff for: core/src/slice/mod.rs

@@ -735,6 +735,7 @@ impl<T> [T] {
     #[stable(feature = "rust1", since = "1.0.0")]
     #[rustc_const_stable(feature = "const_slice_as_ptr", since = "1.32.0")]
     #[rustc_never_returns_null_ptr]
+    #[cfg_attr(not(bootstrap), rustc_as_ptr)]
     #[inline(always)]
     #[must_use]
     pub const fn as_ptr(&self) -> *const T {
@@ -766,6 +767,7 @@ impl<T> [T] {
     #[rustc_const_stable(feature = "const_ptr_offset", since = "1.61.0")]
     #[rustc_allow_const_fn_unstable(const_mut_refs)]
     #[rustc_never_returns_null_ptr]
+    #[cfg_attr(not(bootstrap), rustc_as_ptr)]
     #[inline(always)]
     #[must_use]
     pub const fn as_mut_ptr(&mut self) -> *mut T {

Diff for: core/src/str/mod.rs

@@ -371,6 +371,7 @@ impl str {
     #[stable(feature = "rust1", since = "1.0.0")]
     #[rustc_const_stable(feature = "rustc_str_as_ptr", since = "1.32.0")]
     #[rustc_never_returns_null_ptr]
+    #[cfg_attr(not(bootstrap), rustc_as_ptr)]
     #[must_use]
     #[inline(always)]
     pub const fn as_ptr(&self) -> *const u8 {
@@ -388,6 +389,7 @@ impl str {
     #[stable(feature = "str_as_mut_ptr", since = "1.36.0")]
     #[rustc_const_stable(feature = "const_str_as_mut", since = "1.83.0")]
     #[rustc_never_returns_null_ptr]
+    #[cfg_attr(not(bootstrap), rustc_as_ptr)]
     #[must_use]
     #[inline(always)]
     pub const fn as_mut_ptr(&mut self) -> *mut u8 {