mirror of
https://github.com/rust-lang/rust.git
synced 2024-10-30 05:51:58 +00:00
make ptr metadata functions callable from stable const fn
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58420a065b
commit
5c3ceb3bd9
@ -3160,7 +3160,7 @@ pub const fn type_id<T: ?Sized + 'static>() -> u128 {
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/// change the possible layouts of pointers.
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#[rustc_nounwind]
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#[unstable(feature = "core_intrinsics", issue = "none")]
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#[rustc_const_unstable(feature = "ptr_metadata", issue = "81513")]
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#[rustc_const_stable(feature = "ptr_metadata_const", since = "CURRENT_RUSTC_VERSION")]
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#[rustc_intrinsic]
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#[rustc_intrinsic_must_be_overridden]
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pub const fn aggregate_raw_ptr<P: AggregateRawPtr<D, Metadata = M>, D, M>(_data: D, _meta: M) -> P {
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@ -3185,7 +3185,7 @@ impl<P: ?Sized, T: ptr::Thin> AggregateRawPtr<*mut T> for *mut P {
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/// This is used to implement functions like `ptr::metadata`.
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#[rustc_nounwind]
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#[unstable(feature = "core_intrinsics", issue = "none")]
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#[rustc_const_unstable(feature = "ptr_metadata", issue = "81513")]
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#[rustc_const_stable(feature = "ptr_metadata_const", since = "CURRENT_RUSTC_VERSION")]
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#[rustc_intrinsic]
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#[rustc_intrinsic_must_be_overridden]
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pub const fn ptr_metadata<P: ptr::Pointee<Metadata = M> + ?Sized, M>(_ptr: *const P) -> M {
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@ -92,7 +92,7 @@ impl<T: ?Sized> *const T {
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/// }
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/// ```
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#[unstable(feature = "set_ptr_value", issue = "75091")]
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#[rustc_const_unstable(feature = "set_ptr_value", issue = "75091")]
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#[rustc_const_stable(feature = "ptr_metadata_const", since = "CURRENT_RUSTC_VERSION")]
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#[must_use = "returns a new pointer rather than modifying its argument"]
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#[inline]
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pub const fn with_metadata_of<U>(self, meta: *const U) -> *const U
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@ -412,7 +412,6 @@ impl<T: ?Sized> *const T {
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#[inline(always)]
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#[stable(feature = "pointer_byte_offsets", since = "1.75.0")]
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#[rustc_const_stable(feature = "const_pointer_byte_offsets", since = "1.75.0")]
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#[rustc_allow_const_fn_unstable(set_ptr_value)]
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#[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
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pub const unsafe fn byte_offset(self, count: isize) -> Self {
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// SAFETY: the caller must uphold the safety contract for `offset`.
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@ -495,7 +494,6 @@ impl<T: ?Sized> *const T {
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#[inline(always)]
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#[stable(feature = "pointer_byte_offsets", since = "1.75.0")]
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#[rustc_const_stable(feature = "const_pointer_byte_offsets", since = "1.75.0")]
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#[rustc_allow_const_fn_unstable(set_ptr_value)]
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pub const fn wrapping_byte_offset(self, count: isize) -> Self {
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self.cast::<u8>().wrapping_offset(count).with_metadata_of(self)
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}
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@ -645,7 +643,6 @@ impl<T: ?Sized> *const T {
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#[inline(always)]
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#[stable(feature = "pointer_byte_offsets", since = "1.75.0")]
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#[rustc_const_stable(feature = "const_pointer_byte_offsets", since = "1.75.0")]
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#[rustc_allow_const_fn_unstable(set_ptr_value)]
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#[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
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pub const unsafe fn byte_offset_from<U: ?Sized>(self, origin: *const U) -> isize {
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// SAFETY: the caller must uphold the safety contract for `offset_from`.
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@ -873,7 +870,6 @@ impl<T: ?Sized> *const T {
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#[inline(always)]
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#[stable(feature = "pointer_byte_offsets", since = "1.75.0")]
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#[rustc_const_stable(feature = "const_pointer_byte_offsets", since = "1.75.0")]
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#[rustc_allow_const_fn_unstable(set_ptr_value)]
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#[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
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pub const unsafe fn byte_add(self, count: usize) -> Self {
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// SAFETY: the caller must uphold the safety contract for `add`.
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@ -956,7 +952,6 @@ impl<T: ?Sized> *const T {
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#[inline(always)]
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#[stable(feature = "pointer_byte_offsets", since = "1.75.0")]
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#[rustc_const_stable(feature = "const_pointer_byte_offsets", since = "1.75.0")]
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#[rustc_allow_const_fn_unstable(set_ptr_value)]
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#[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
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pub const unsafe fn byte_sub(self, count: usize) -> Self {
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// SAFETY: the caller must uphold the safety contract for `sub`.
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@ -1039,7 +1034,6 @@ impl<T: ?Sized> *const T {
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#[inline(always)]
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#[stable(feature = "pointer_byte_offsets", since = "1.75.0")]
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#[rustc_const_stable(feature = "const_pointer_byte_offsets", since = "1.75.0")]
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#[rustc_allow_const_fn_unstable(set_ptr_value)]
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pub const fn wrapping_byte_add(self, count: usize) -> Self {
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self.cast::<u8>().wrapping_add(count).with_metadata_of(self)
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}
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@ -1120,7 +1114,6 @@ impl<T: ?Sized> *const T {
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#[inline(always)]
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#[stable(feature = "pointer_byte_offsets", since = "1.75.0")]
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#[rustc_const_stable(feature = "const_pointer_byte_offsets", since = "1.75.0")]
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#[rustc_allow_const_fn_unstable(set_ptr_value)]
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pub const fn wrapping_byte_sub(self, count: usize) -> Self {
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self.cast::<u8>().wrapping_sub(count).with_metadata_of(self)
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}
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@ -1554,7 +1547,6 @@ impl<T> *const [T] {
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#[inline]
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#[stable(feature = "slice_ptr_len", since = "1.79.0")]
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#[rustc_const_stable(feature = "const_slice_ptr_len", since = "1.79.0")]
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#[rustc_allow_const_fn_unstable(ptr_metadata)]
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pub const fn len(self) -> usize {
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metadata(self)
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}
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@ -92,7 +92,7 @@ pub trait Thin = Pointee<Metadata = ()>;
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///
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/// assert_eq!(std::ptr::metadata("foo"), 3_usize);
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/// ```
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#[rustc_const_unstable(feature = "ptr_metadata", issue = "81513")]
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#[rustc_const_stable(feature = "ptr_metadata_const", since = "CURRENT_RUSTC_VERSION")]
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#[inline]
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pub const fn metadata<T: ?Sized>(ptr: *const T) -> <T as Pointee>::Metadata {
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ptr_metadata(ptr)
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@ -106,7 +106,7 @@ pub const fn metadata<T: ?Sized>(ptr: *const T) -> <T as Pointee>::Metadata {
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///
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/// [`slice::from_raw_parts`]: crate::slice::from_raw_parts
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#[unstable(feature = "ptr_metadata", issue = "81513")]
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#[rustc_const_unstable(feature = "ptr_metadata", issue = "81513")]
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#[rustc_const_stable(feature = "ptr_metadata_const", since = "CURRENT_RUSTC_VERSION")]
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#[inline]
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pub const fn from_raw_parts<T: ?Sized>(
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data_pointer: *const impl Thin,
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@ -120,7 +120,7 @@ pub const fn from_raw_parts<T: ?Sized>(
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///
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/// See the documentation of [`from_raw_parts`] for more details.
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#[unstable(feature = "ptr_metadata", issue = "81513")]
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#[rustc_const_unstable(feature = "ptr_metadata", issue = "81513")]
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#[rustc_const_stable(feature = "ptr_metadata_const", since = "CURRENT_RUSTC_VERSION")]
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#[inline]
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pub const fn from_raw_parts_mut<T: ?Sized>(
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data_pointer: *mut impl Thin,
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@ -599,7 +599,6 @@ pub unsafe fn drop_in_place<T: ?Sized>(to_drop: *mut T) {
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#[stable(feature = "rust1", since = "1.0.0")]
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#[rustc_promotable]
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#[rustc_const_stable(feature = "const_ptr_null", since = "1.24.0")]
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#[rustc_allow_const_fn_unstable(ptr_metadata)]
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#[rustc_diagnostic_item = "ptr_null"]
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pub const fn null<T: ?Sized + Thin>() -> *const T {
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from_raw_parts(without_provenance::<()>(0), ())
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@ -625,7 +624,6 @@ pub const fn null<T: ?Sized + Thin>() -> *const T {
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#[stable(feature = "rust1", since = "1.0.0")]
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#[rustc_promotable]
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#[rustc_const_stable(feature = "const_ptr_null", since = "1.24.0")]
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#[rustc_allow_const_fn_unstable(ptr_metadata)]
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#[rustc_diagnostic_item = "ptr_null_mut"]
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pub const fn null_mut<T: ?Sized + Thin>() -> *mut T {
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from_raw_parts_mut(without_provenance_mut::<()>(0), ())
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@ -949,7 +947,6 @@ pub const fn from_mut<T: ?Sized>(r: &mut T) -> *mut T {
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#[inline]
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#[stable(feature = "slice_from_raw_parts", since = "1.42.0")]
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#[rustc_const_stable(feature = "const_slice_from_raw_parts", since = "1.64.0")]
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#[rustc_allow_const_fn_unstable(ptr_metadata)]
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#[rustc_diagnostic_item = "ptr_slice_from_raw_parts"]
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pub const fn slice_from_raw_parts<T>(data: *const T, len: usize) -> *const [T] {
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from_raw_parts(data, len)
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@ -74,7 +74,7 @@ impl<T: ?Sized> *mut T {
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/// }
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/// ```
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#[unstable(feature = "set_ptr_value", issue = "75091")]
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#[rustc_const_unstable(feature = "set_ptr_value", issue = "75091")]
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#[rustc_const_stable(feature = "ptr_metadata_const", since = "CURRENT_RUSTC_VERSION")]
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#[must_use = "returns a new pointer rather than modifying its argument"]
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#[inline]
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pub const fn with_metadata_of<U>(self, meta: *const U) -> *mut U
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@ -412,7 +412,6 @@ impl<T: ?Sized> *mut T {
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#[inline(always)]
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#[stable(feature = "pointer_byte_offsets", since = "1.75.0")]
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#[rustc_const_stable(feature = "const_pointer_byte_offsets", since = "1.75.0")]
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#[rustc_allow_const_fn_unstable(set_ptr_value)]
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#[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
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pub const unsafe fn byte_offset(self, count: isize) -> Self {
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// SAFETY: the caller must uphold the safety contract for `offset`.
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@ -492,7 +491,6 @@ impl<T: ?Sized> *mut T {
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#[inline(always)]
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#[stable(feature = "pointer_byte_offsets", since = "1.75.0")]
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#[rustc_const_stable(feature = "const_pointer_byte_offsets", since = "1.75.0")]
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#[rustc_allow_const_fn_unstable(set_ptr_value)]
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pub const fn wrapping_byte_offset(self, count: isize) -> Self {
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self.cast::<u8>().wrapping_offset(count).with_metadata_of(self)
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}
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@ -808,7 +806,6 @@ impl<T: ?Sized> *mut T {
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#[inline(always)]
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#[stable(feature = "pointer_byte_offsets", since = "1.75.0")]
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#[rustc_const_stable(feature = "const_pointer_byte_offsets", since = "1.75.0")]
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#[rustc_allow_const_fn_unstable(set_ptr_value)]
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#[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
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pub const unsafe fn byte_offset_from<U: ?Sized>(self, origin: *const U) -> isize {
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// SAFETY: the caller must uphold the safety contract for `offset_from`.
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@ -954,7 +951,6 @@ impl<T: ?Sized> *mut T {
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#[inline(always)]
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#[stable(feature = "pointer_byte_offsets", since = "1.75.0")]
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#[rustc_const_stable(feature = "const_pointer_byte_offsets", since = "1.75.0")]
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#[rustc_allow_const_fn_unstable(set_ptr_value)]
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#[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
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pub const unsafe fn byte_add(self, count: usize) -> Self {
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// SAFETY: the caller must uphold the safety contract for `add`.
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@ -1037,7 +1033,6 @@ impl<T: ?Sized> *mut T {
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#[inline(always)]
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#[stable(feature = "pointer_byte_offsets", since = "1.75.0")]
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#[rustc_const_stable(feature = "const_pointer_byte_offsets", since = "1.75.0")]
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#[rustc_allow_const_fn_unstable(set_ptr_value)]
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#[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
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pub const unsafe fn byte_sub(self, count: usize) -> Self {
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// SAFETY: the caller must uphold the safety contract for `sub`.
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@ -1118,7 +1113,6 @@ impl<T: ?Sized> *mut T {
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#[inline(always)]
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#[stable(feature = "pointer_byte_offsets", since = "1.75.0")]
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#[rustc_const_stable(feature = "const_pointer_byte_offsets", since = "1.75.0")]
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#[rustc_allow_const_fn_unstable(set_ptr_value)]
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pub const fn wrapping_byte_add(self, count: usize) -> Self {
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self.cast::<u8>().wrapping_add(count).with_metadata_of(self)
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}
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@ -1197,7 +1191,6 @@ impl<T: ?Sized> *mut T {
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#[inline(always)]
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#[stable(feature = "pointer_byte_offsets", since = "1.75.0")]
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#[rustc_const_stable(feature = "const_pointer_byte_offsets", since = "1.75.0")]
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#[rustc_allow_const_fn_unstable(set_ptr_value)]
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pub const fn wrapping_byte_sub(self, count: usize) -> Self {
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self.cast::<u8>().wrapping_sub(count).with_metadata_of(self)
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}
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@ -1804,7 +1797,6 @@ impl<T> *mut [T] {
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#[inline(always)]
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#[stable(feature = "slice_ptr_len", since = "1.79.0")]
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#[rustc_const_stable(feature = "const_slice_ptr_len", since = "1.79.0")]
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#[rustc_allow_const_fn_unstable(ptr_metadata)]
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pub const fn len(self) -> usize {
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metadata(self)
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}
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@ -567,7 +567,6 @@ impl<T: ?Sized> NonNull<T> {
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#[must_use]
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#[inline(always)]
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#[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
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#[rustc_allow_const_fn_unstable(set_ptr_value)]
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#[stable(feature = "non_null_convenience", since = "1.80.0")]
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#[rustc_const_stable(feature = "non_null_convenience", since = "1.80.0")]
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pub const unsafe fn byte_add(self, count: usize) -> Self {
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@ -651,7 +650,6 @@ impl<T: ?Sized> NonNull<T> {
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#[must_use]
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#[inline(always)]
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#[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
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#[rustc_allow_const_fn_unstable(set_ptr_value)]
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#[stable(feature = "non_null_convenience", since = "1.80.0")]
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#[rustc_const_stable(feature = "non_null_convenience", since = "1.80.0")]
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pub const unsafe fn byte_sub(self, count: usize) -> Self {
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@ -111,7 +111,6 @@ impl<T> [T] {
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#[lang = "slice_len_fn"]
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#[stable(feature = "rust1", since = "1.0.0")]
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#[rustc_const_stable(feature = "const_slice_len", since = "1.39.0")]
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#[rustc_allow_const_fn_unstable(ptr_metadata)]
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#[inline]
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#[must_use]
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pub const fn len(&self) -> usize {
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