mirror of
https://github.com/rust-lang/rust
synced 2024-10-18 14:33:50 +00:00
UnsafeCell now has no niches, ever.
This commit is contained in:
Oli Scherer
parent
e78e747f53
commit
2a899dc1cf
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@ -856,7 +856,6 @@ pub enum ReprAttr {
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ReprSimd,
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ReprTransparent,
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ReprAlign(u32),
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ReprNoNiche,
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}
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#[derive(Eq, PartialEq, Debug, Copy, Clone)]
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@ -904,7 +903,6 @@ pub fn parse_repr_attr(sess: &Session, attr: &Attribute) -> Vec<ReprAttr> {
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sym::packed => Some(ReprPacked(1)),
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sym::simd => Some(ReprSimd),
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sym::transparent => Some(ReprTransparent),
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sym::no_niche => Some(ReprNoNiche),
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sym::align => {
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let mut err = struct_span_err!(
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diagnostic,
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@ -943,7 +941,7 @@ pub fn parse_repr_attr(sess: &Session, attr: &Attribute) -> Vec<ReprAttr> {
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Ok(literal) => acc.push(ReprPacked(literal)),
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Err(message) => literal_error = Some(message),
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};
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} else if matches!(name, sym::C | sym::simd | sym::transparent | sym::no_niche)
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} else if matches!(name, sym::C | sym::simd | sym::transparent)
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|| int_type_of_word(name).is_some()
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{
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recognised = true;
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@ -1001,7 +999,7 @@ pub fn parse_repr_attr(sess: &Session, attr: &Attribute) -> Vec<ReprAttr> {
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} else {
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if matches!(
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meta_item.name_or_empty(),
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sym::C | sym::simd | sym::transparent | sym::no_niche
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sym::C | sym::simd | sym::transparent
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) || int_type_of_word(meta_item.name_or_empty()).is_some()
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{
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recognised = true;
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@ -1039,7 +1037,7 @@ pub fn parse_repr_attr(sess: &Session, attr: &Attribute) -> Vec<ReprAttr> {
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.emit();
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} else if matches!(
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meta_item.name_or_empty(),
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sym::C | sym::simd | sym::transparent | sym::no_niche
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sym::C | sym::simd | sym::transparent
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) || int_type_of_word(meta_item.name_or_empty()).is_some()
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{
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recognised = true;
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@ -217,7 +217,7 @@ fn visit_aggregate(
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}
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if let Some(def) = mplace.layout.ty.ty_adt_def() {
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if Some(def.did()) == self.ecx.tcx.lang_items().unsafe_cell_type() {
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if def.is_unsafe_cell() {
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// We are crossing over an `UnsafeCell`, we can mutate again. This means that
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// References we encounter inside here are interned as pointing to mutable
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// allocations.
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@ -821,7 +821,7 @@ fn visit_value(&mut self, op: &OpTy<'tcx, M::PointerTag>) -> InterpResult<'tcx>
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// Special check preventing `UnsafeCell` in the inner part of constants
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if let Some(def) = op.layout.ty.ty_adt_def() {
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if matches!(self.ctfe_mode, Some(CtfeValidationMode::Const { inner: true, .. }))
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&& Some(def.did()) == self.ecx.tcx.lang_items().unsafe_cell_type()
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&& def.is_unsafe_cell()
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{
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throw_validation_failure!(self.path, { "`UnsafeCell` in a `const`" });
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}
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@ -96,13 +96,13 @@ fn in_any_value_of_ty<'tcx>(cx: &ConstCx<'_, 'tcx>, ty: Ty<'tcx>) -> bool {
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}
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fn in_adt_inherently<'tcx>(
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cx: &ConstCx<'_, 'tcx>,
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_cx: &ConstCx<'_, 'tcx>,
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adt: AdtDef<'tcx>,
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_: SubstsRef<'tcx>,
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) -> bool {
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// Exactly one type, `UnsafeCell`, has the `HasMutInterior` qualif inherently.
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// It arises structurally for all other types.
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Some(adt.did()) == cx.tcx.lang_items().unsafe_cell_type()
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adt.is_unsafe_cell()
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}
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}
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@ -156,9 +156,6 @@ pub fn set(&self, features: &mut Features, span: Span) {
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(active, intrinsics, "1.0.0", None, None),
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/// Allows using `#[lang = ".."]` attribute for linking items to special compiler logic.
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(active, lang_items, "1.0.0", None, None),
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/// Allows `#[repr(no_niche)]` (an implementation detail of `rustc`,
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/// it is not on path for eventual stabilization).
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(active, no_niche, "1.42.0", None, None),
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/// Allows using `#[omit_gdb_pretty_printer_section]`.
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(active, omit_gdb_pretty_printer_section, "1.5.0", None, None),
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/// Allows using `#[prelude_import]` on glob `use` items.
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@ -705,7 +705,7 @@ fn ty_is_known_nonnull<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>, mode: CItemKi
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// Types with a `#[repr(no_niche)]` attribute have their niche hidden.
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// The attribute is used by the UnsafeCell for example (the only use so far).
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if def.repr().hide_niche() {
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if def.is_unsafe_cell() {
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return false;
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}
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@ -52,6 +52,8 @@ pub struct AdtFlags: u32 {
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/// Indicates whether the variant list of this ADT is `#[non_exhaustive]`.
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/// (i.e., this flag is never set unless this ADT is an enum).
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const IS_VARIANT_LIST_NON_EXHAUSTIVE = 1 << 8;
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/// Indicates whether the type is `UnsafeCell`.
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const IS_UNSAFE_CELL = 1 << 9;
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}
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}
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@ -242,6 +244,9 @@ pub(super) fn new(
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if Some(did) == tcx.lang_items().manually_drop() {
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flags |= AdtFlags::IS_MANUALLY_DROP;
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}
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if Some(did) == tcx.lang_items().unsafe_cell_type() {
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flags |= AdtFlags::IS_UNSAFE_CELL;
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}
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AdtDefData { did, variants, flags, repr }
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}
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@ -328,6 +333,12 @@ pub fn is_box(self) -> bool {
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self.flags().contains(AdtFlags::IS_BOX)
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}
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/// Returns `true` if this is UnsafeCell<T>.
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#[inline]
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pub fn is_unsafe_cell(self) -> bool {
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self.flags().contains(AdtFlags::IS_UNSAFE_CELL)
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}
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/// Returns `true` if this is `ManuallyDrop<T>`.
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#[inline]
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pub fn is_manually_drop(self) -> bool {
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@ -542,14 +542,12 @@ fn univariant_uninterned(
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debug!("univariant offset: {:?} field: {:#?}", offset, field);
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offsets[i as usize] = offset;
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if !repr.hide_niche() {
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if let Some(mut niche) = field.largest_niche {
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let available = niche.available(dl);
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if available > largest_niche_available {
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largest_niche_available = available;
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niche.offset += offset;
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largest_niche = Some(niche);
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}
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if let Some(mut niche) = field.largest_niche {
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let available = niche.available(dl);
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if available > largest_niche_available {
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largest_niche_available = available;
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niche.offset += offset;
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largest_niche = Some(niche);
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}
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}
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@ -1104,23 +1102,29 @@ fn layout_of_uncached(&self, ty: Ty<'tcx>) -> Result<Layout<'tcx>, LayoutError<'
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assert!(valid_range.end >= end);
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valid_range.end = end;
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}
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// Update `largest_niche` if we have introduced a larger niche.
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let niche = if def.repr().hide_niche() {
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None
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} else {
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Niche::from_scalar(dl, Size::ZERO, *scalar)
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};
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if let Some(niche) = niche {
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match st.largest_niche {
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Some(largest_niche) => {
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// Replace the existing niche even if they're equal,
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// because this one is at a lower offset.
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if largest_niche.available(dl) <= niche.available(dl) {
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st.largest_niche = Some(niche);
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}
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if def.is_unsafe_cell() {
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match scalar {
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Scalar::Initialized { value, valid_range } => {
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*valid_range = WrappingRange::full(value.size(dl))
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}
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// Already doesn't have any niches
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Scalar::Union { .. } => {}
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}
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st.largest_niche = None;
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} else {
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// Update `largest_niche` if we have introduced a larger niche.
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let niche = Niche::from_scalar(dl, Size::ZERO, *scalar);
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if let Some(niche) = niche {
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match st.largest_niche {
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Some(largest_niche) => {
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// Replace the existing niche even if they're equal,
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// because this one is at a lower offset.
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if largest_niche.available(dl) <= niche.available(dl) {
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st.largest_niche = Some(niche);
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}
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}
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None => st.largest_niche = Some(niche),
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}
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None => st.largest_niche = Some(niche),
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}
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}
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}
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@ -1719,11 +1719,9 @@ pub struct ReprFlags: u8 {
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const IS_TRANSPARENT = 1 << 2;
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// Internal only for now. If true, don't reorder fields.
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const IS_LINEAR = 1 << 3;
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// If true, don't expose any niche to type's context.
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const HIDE_NICHE = 1 << 4;
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// If true, the type's layout can be randomized using
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// the seed stored in `ReprOptions.layout_seed`
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const RANDOMIZE_LAYOUT = 1 << 5;
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const RANDOMIZE_LAYOUT = 1 << 4;
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// Any of these flags being set prevent field reordering optimisation.
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const IS_UNOPTIMISABLE = ReprFlags::IS_C.bits
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| ReprFlags::IS_SIMD.bits
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@ -1780,7 +1778,6 @@ pub fn new(tcx: TyCtxt<'_>, did: DefId) -> ReprOptions {
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ReprFlags::empty()
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}
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attr::ReprTransparent => ReprFlags::IS_TRANSPARENT,
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attr::ReprNoNiche => ReprFlags::HIDE_NICHE,
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attr::ReprSimd => ReprFlags::IS_SIMD,
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attr::ReprInt(i) => {
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size = Some(i);
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@ -1833,11 +1830,6 @@ pub fn linear(&self) -> bool {
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self.flags.contains(ReprFlags::IS_LINEAR)
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}
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#[inline]
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pub fn hide_niche(&self) -> bool {
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self.flags.contains(ReprFlags::HIDE_NICHE)
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}
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/// Returns the discriminant type, given these `repr` options.
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/// This must only be called on enums!
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pub fn discr_type(&self) -> attr::IntType {
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@ -1808,21 +1808,6 @@ fn check_repr(
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_ => ("a", "struct, enum, or union"),
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}
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}
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sym::no_niche => {
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if !self.tcx.features().enabled(sym::no_niche) {
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feature_err(
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&self.tcx.sess.parse_sess,
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sym::no_niche,
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hint.span(),
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"the attribute `repr(no_niche)` is currently unstable",
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)
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.emit();
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}
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match target {
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Target::Struct | Target::Enum => continue,
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_ => ("a", "struct or enum"),
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}
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}
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sym::i8
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| sym::u8
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| sym::i16
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@ -1870,10 +1855,8 @@ fn check_repr(
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// This is not ideal, but tracking precisely which ones are at fault is a huge hassle.
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let hint_spans = hints.iter().map(|hint| hint.span());
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// Error on repr(transparent, <anything else apart from no_niche>).
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let non_no_niche = |hint: &&NestedMetaItem| hint.name_or_empty() != sym::no_niche;
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let non_no_niche_count = hints.iter().filter(non_no_niche).count();
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if is_transparent && non_no_niche_count > 1 {
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// Error on repr(transparent, <anything else>).
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if is_transparent && hints.len() > 1 {
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let hint_spans: Vec<_> = hint_spans.clone().collect();
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struct_span_err!(
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self.tcx.sess,
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@ -979,7 +979,6 @@
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no_link,
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no_main,
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no_mangle,
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no_niche,
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no_sanitize,
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no_stack_check,
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no_start,
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@ -1152,7 +1151,6 @@
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repr128,
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repr_align,
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repr_align_enum,
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repr_no_niche,
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repr_packed,
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repr_simd,
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repr_transparent,
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@ -1856,7 +1856,6 @@ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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#[lang = "unsafe_cell"]
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#[stable(feature = "rust1", since = "1.0.0")]
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#[repr(transparent)]
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#[repr(no_niche)] // rust-lang/rust#68303.
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pub struct UnsafeCell<T: ?Sized> {
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value: T,
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}
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@ -191,7 +191,6 @@
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#![feature(never_type)]
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#![feature(no_core)]
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#![feature(no_coverage)] // rust-lang/rust#84605
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#![feature(no_niche)] // rust-lang/rust#68303
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#![feature(platform_intrinsics)]
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#![feature(prelude_import)]
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#![feature(repr_simd)]
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@ -5,8 +5,6 @@
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// run-pass
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#![feature(no_niche)]
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use std::cell::UnsafeCell;
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use std::mem::size_of;
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use std::num::NonZeroU32 as N32;
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@ -16,8 +14,7 @@
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#[repr(transparent)]
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struct Transparent<T>(T);
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#[repr(no_niche)]
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struct NoNiche<T>(T);
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struct NoNiche<T>(UnsafeCell<T>);
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fn main() {
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assert_eq!(size_of::<Option<Wrapper<u32>>>(), 8);
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@ -1,7 +1,6 @@
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// check-pass
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// aux-build:external_extern_fn.rs
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#![crate_type = "lib"]
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#![feature(no_niche)]
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#![warn(clashing_extern_declarations)]
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mod redeclared_different_signature {
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@ -400,9 +399,8 @@ mod b {
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#[repr(transparent)]
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struct Transparent { x: NonZeroUsize }
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#[repr(no_niche)]
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#[repr(transparent)]
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struct TransparentNoNiche { y: NonZeroUsize }
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struct TransparentNoNiche { y: UnsafeCell<NonZeroUsize> }
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extern "C" {
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fn hidden_niche_transparent() -> Option<Transparent>;
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|
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@ -1,5 +1,5 @@
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warning: `clash` redeclared with a different signature
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--> $DIR/clashing-extern-fn.rs:15:13
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--> $DIR/clashing-extern-fn.rs:14:13
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|
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LL | fn clash(x: u8);
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| ---------------- `clash` previously declared here
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@ -8,7 +8,7 @@ LL | fn clash(x: u64);
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| ^^^^^^^^^^^^^^^^^ this signature doesn't match the previous declaration
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|
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note: the lint level is defined here
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--> $DIR/clashing-extern-fn.rs:5:9
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--> $DIR/clashing-extern-fn.rs:4:9
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|
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LL | #![warn(clashing_extern_declarations)]
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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@ -16,7 +16,7 @@ LL | #![warn(clashing_extern_declarations)]
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found `unsafe extern "C" fn(u64)`
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warning: `extern_link_name` redeclared with a different signature
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--> $DIR/clashing-extern-fn.rs:53:9
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--> $DIR/clashing-extern-fn.rs:52:9
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|
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LL | / #[link_name = "extern_link_name"]
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LL | | fn some_new_name(x: i16);
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@ -29,7 +29,7 @@ LL | fn extern_link_name(x: u32);
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found `unsafe extern "C" fn(u32)`
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warning: `some_other_extern_link_name` redeclares `some_other_new_name` with a different signature
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--> $DIR/clashing-extern-fn.rs:56:9
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--> $DIR/clashing-extern-fn.rs:55:9
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|
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LL | fn some_other_new_name(x: i16);
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| ------------------------------- `some_other_new_name` previously declared here
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@ -43,7 +43,7 @@ LL | | fn some_other_extern_link_name(x: u32);
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found `unsafe extern "C" fn(u32)`
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warning: `other_both_names_different` redeclares `link_name_same` with a different signature
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--> $DIR/clashing-extern-fn.rs:60:9
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--> $DIR/clashing-extern-fn.rs:59:9
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|
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LL | / #[link_name = "link_name_same"]
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LL | | fn both_names_different(x: i16);
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@ -58,7 +58,7 @@ LL | | fn other_both_names_different(x: u32);
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found `unsafe extern "C" fn(u32)`
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warning: `different_mod` redeclared with a different signature
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--> $DIR/clashing-extern-fn.rs:73:9
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--> $DIR/clashing-extern-fn.rs:72:9
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|
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LL | fn different_mod(x: u8);
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| ------------------------ `different_mod` previously declared here
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|
|
@ -70,7 +70,7 @@ LL | fn different_mod(x: u64);
|
|||
found `unsafe extern "C" fn(u64)`
|
||||
|
||||
warning: `variadic_decl` redeclared with a different signature
|
||||
--> $DIR/clashing-extern-fn.rs:83:9
|
||||
--> $DIR/clashing-extern-fn.rs:82:9
|
||||
|
|
||||
LL | fn variadic_decl(x: u8, ...);
|
||||
| ----------------------------- `variadic_decl` previously declared here
|
||||
|
|
@ -82,7 +82,7 @@ LL | fn variadic_decl(x: u8);
|
|||
found `unsafe extern "C" fn(u8)`
|
||||
|
||||
warning: `weigh_banana` redeclared with a different signature
|
||||
--> $DIR/clashing-extern-fn.rs:143:13
|
||||
--> $DIR/clashing-extern-fn.rs:142:13
|
||||
|
|
||||
LL | fn weigh_banana(count: *const Banana) -> u64;
|
||||
| --------------------------------------------- `weigh_banana` previously declared here
|
||||
|
|
@ -94,7 +94,7 @@ LL | fn weigh_banana(count: *const Banana) -> u64;
|
|||
found `unsafe extern "C" fn(*const three::Banana) -> u64`
|
||||
|
||||
warning: `draw_point` redeclared with a different signature
|
||||
--> $DIR/clashing-extern-fn.rs:172:13
|
||||
--> $DIR/clashing-extern-fn.rs:171:13
|
||||
|
|
||||
LL | fn draw_point(p: Point);
|
||||
| ------------------------ `draw_point` previously declared here
|
||||
|
|
@ -106,7 +106,7 @@ LL | fn draw_point(p: Point);
|
|||
found `unsafe extern "C" fn(sameish_members::b::Point)`
|
||||
|
||||
warning: `origin` redeclared with a different signature
|
||||
--> $DIR/clashing-extern-fn.rs:198:13
|
||||
--> $DIR/clashing-extern-fn.rs:197:13
|
||||
|
|
||||
LL | fn origin() -> Point3;
|
||||
| ---------------------- `origin` previously declared here
|
||||
|
|
@ -118,7 +118,7 @@ LL | fn origin() -> Point3;
|
|||
found `unsafe extern "C" fn() -> same_sized_members_clash::b::Point3`
|
||||
|
||||
warning: `transparent_incorrect` redeclared with a different signature
|
||||
--> $DIR/clashing-extern-fn.rs:221:13
|
||||
--> $DIR/clashing-extern-fn.rs:220:13
|
||||
|
|
||||
LL | fn transparent_incorrect() -> T;
|
||||
| -------------------------------- `transparent_incorrect` previously declared here
|
||||
|
|
@ -130,7 +130,7 @@ LL | fn transparent_incorrect() -> isize;
|
|||
found `unsafe extern "C" fn() -> isize`
|
||||
|
||||
warning: `missing_return_type` redeclared with a different signature
|
||||
--> $DIR/clashing-extern-fn.rs:239:13
|
||||
--> $DIR/clashing-extern-fn.rs:238:13
|
||||
|
|
||||
LL | fn missing_return_type() -> usize;
|
||||
| ---------------------------------- `missing_return_type` previously declared here
|
||||
|
|
@ -142,7 +142,7 @@ LL | fn missing_return_type();
|
|||
found `unsafe extern "C" fn()`
|
||||
|
||||
warning: `non_zero_usize` redeclared with a different signature
|
||||
--> $DIR/clashing-extern-fn.rs:257:13
|
||||
--> $DIR/clashing-extern-fn.rs:256:13
|
||||
|
|
||||
LL | fn non_zero_usize() -> core::num::NonZeroUsize;
|
||||
| ----------------------------------------------- `non_zero_usize` previously declared here
|
||||
|
|
@ -154,7 +154,7 @@ LL | fn non_zero_usize() -> usize;
|
|||
found `unsafe extern "C" fn() -> usize`
|
||||
|
||||
warning: `non_null_ptr` redeclared with a different signature
|
||||
--> $DIR/clashing-extern-fn.rs:259:13
|
||||
--> $DIR/clashing-extern-fn.rs:258:13
|
||||
|
|
||||
LL | fn non_null_ptr() -> core::ptr::NonNull<usize>;
|
||||
| ----------------------------------------------- `non_null_ptr` previously declared here
|
||||
|
|
@ -166,7 +166,7 @@ LL | fn non_null_ptr() -> *const usize;
|
|||
found `unsafe extern "C" fn() -> *const usize`
|
||||
|
||||
warning: `option_non_zero_usize_incorrect` redeclared with a different signature
|
||||
--> $DIR/clashing-extern-fn.rs:357:13
|
||||
--> $DIR/clashing-extern-fn.rs:356:13
|
||||
|
|
||||
LL | fn option_non_zero_usize_incorrect() -> usize;
|
||||
| ---------------------------------------------- `option_non_zero_usize_incorrect` previously declared here
|
||||
|
|
@ -178,7 +178,7 @@ LL | fn option_non_zero_usize_incorrect() -> isize;
|
|||
found `unsafe extern "C" fn() -> isize`
|
||||
|
||||
warning: `option_non_null_ptr_incorrect` redeclared with a different signature
|
||||
--> $DIR/clashing-extern-fn.rs:359:13
|
||||
--> $DIR/clashing-extern-fn.rs:358:13
|
||||
|
|
||||
LL | fn option_non_null_ptr_incorrect() -> *const usize;
|
||||
| --------------------------------------------------- `option_non_null_ptr_incorrect` previously declared here
|
||||
|
|
@ -190,7 +190,7 @@ LL | fn option_non_null_ptr_incorrect() -> *const isize;
|
|||
found `unsafe extern "C" fn() -> *const isize`
|
||||
|
||||
warning: `hidden_niche_transparent_no_niche` redeclared with a different signature
|
||||
--> $DIR/clashing-extern-fn.rs:410:13
|
||||
--> $DIR/clashing-extern-fn.rs:408:13
|
||||
|
|
||||
LL | fn hidden_niche_transparent_no_niche() -> usize;
|
||||
| ------------------------------------------------ `hidden_niche_transparent_no_niche` previously declared here
|
||||
|
|
@ -202,7 +202,7 @@ LL | fn hidden_niche_transparent_no_niche() -> Option<TransparentNoN
|
|||
found `unsafe extern "C" fn() -> Option<TransparentNoNiche>`
|
||||
|
||||
warning: `hidden_niche_unsafe_cell` redeclared with a different signature
|
||||
--> $DIR/clashing-extern-fn.rs:414:13
|
||||
--> $DIR/clashing-extern-fn.rs:412:13
|
||||
|
|
||||
LL | fn hidden_niche_unsafe_cell() -> usize;
|
||||
| --------------------------------------- `hidden_niche_unsafe_cell` previously declared here
|
||||
|
|
@ -214,7 +214,7 @@ LL | fn hidden_niche_unsafe_cell() -> Option<UnsafeCell<NonZeroUsize
|
|||
found `unsafe extern "C" fn() -> Option<UnsafeCell<NonZeroUsize>>`
|
||||
|
||||
warning: `extern` block uses type `Option<TransparentNoNiche>`, which is not FFI-safe
|
||||
--> $DIR/clashing-extern-fn.rs:410:55
|
||||
--> $DIR/clashing-extern-fn.rs:408:55
|
||||
|
|
||||
LL | fn hidden_niche_transparent_no_niche() -> Option<TransparentNoNiche>;
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
|
||||
|
|
@ -224,7 +224,7 @@ LL | fn hidden_niche_transparent_no_niche() -> Option<TransparentNoN
|
|||
= note: enum has no representation hint
|
||||
|
||||
warning: `extern` block uses type `Option<UnsafeCell<NonZeroUsize>>`, which is not FFI-safe
|
||||
--> $DIR/clashing-extern-fn.rs:414:46
|
||||
--> $DIR/clashing-extern-fn.rs:412:46
|
||||
|
|
||||
LL | fn hidden_niche_unsafe_cell() -> Option<UnsafeCell<NonZeroUsize>>;
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
|
||||
|
|
|
|||
|
|
@ -1,20 +0,0 @@
|
|||
use std::num::NonZeroU8 as N8;
|
||||
use std::num::NonZeroU16 as N16;
|
||||
|
||||
#[repr(no_niche)]
|
||||
pub struct Cloaked(N16);
|
||||
//~^^ ERROR the attribute `repr(no_niche)` is currently unstable [E0658]
|
||||
|
||||
#[repr(transparent, no_niche)]
|
||||
pub struct Shadowy(N16);
|
||||
//~^^ ERROR the attribute `repr(no_niche)` is currently unstable [E0658]
|
||||
|
||||
#[repr(no_niche)]
|
||||
pub enum Cloaked1 { _A(N16), }
|
||||
//~^^ ERROR the attribute `repr(no_niche)` is currently unstable [E0658]
|
||||
|
||||
#[repr(no_niche)]
|
||||
pub enum Cloaked2 { _A(N16), _B(u8, N8) }
|
||||
//~^^ ERROR the attribute `repr(no_niche)` is currently unstable [E0658]
|
||||
|
||||
fn main() { }
|
||||
|
|
@ -1,35 +0,0 @@
|
|||
error[E0658]: the attribute `repr(no_niche)` is currently unstable
|
||||
--> $DIR/feature-gate-no-niche.rs:4:8
|
||||
|
|
||||
LL | #[repr(no_niche)]
|
||||
| ^^^^^^^^
|
||||
|
|
||||
= help: add `#![feature(no_niche)]` to the crate attributes to enable
|
||||
|
||||
error[E0658]: the attribute `repr(no_niche)` is currently unstable
|
||||
--> $DIR/feature-gate-no-niche.rs:8:21
|
||||
|
|
||||
LL | #[repr(transparent, no_niche)]
|
||||
| ^^^^^^^^
|
||||
|
|
||||
= help: add `#![feature(no_niche)]` to the crate attributes to enable
|
||||
|
||||
error[E0658]: the attribute `repr(no_niche)` is currently unstable
|
||||
--> $DIR/feature-gate-no-niche.rs:12:8
|
||||
|
|
||||
LL | #[repr(no_niche)]
|
||||
| ^^^^^^^^
|
||||
|
|
||||
= help: add `#![feature(no_niche)]` to the crate attributes to enable
|
||||
|
||||
error[E0658]: the attribute `repr(no_niche)` is currently unstable
|
||||
--> $DIR/feature-gate-no-niche.rs:16:8
|
||||
|
|
||||
LL | #[repr(no_niche)]
|
||||
| ^^^^^^^^
|
||||
|
|
||||
= help: add `#![feature(no_niche)]` to the crate attributes to enable
|
||||
|
||||
error: aborting due to 4 previous errors
|
||||
|
||||
For more information about this error, try `rustc --explain E0658`.
|
||||
|
|
@ -1,14 +0,0 @@
|
|||
#![feature(no_niche)]
|
||||
|
||||
use std::num::NonZeroU8 as N8;
|
||||
use std::num::NonZeroU16 as N16;
|
||||
|
||||
#[repr(no_niche)]
|
||||
pub union Cloaked1 { _A: N16 }
|
||||
//~^^ ERROR attribute should be applied to a struct or enum [E0517]
|
||||
|
||||
#[repr(no_niche)]
|
||||
pub union Cloaked2 { _A: N16, _B: (u8, N8) }
|
||||
//~^^ ERROR attribute should be applied to a struct or enum [E0517]
|
||||
|
||||
fn main() { }
|
||||
|
|
@ -1,19 +0,0 @@
|
|||
error[E0517]: attribute should be applied to a struct or enum
|
||||
--> $DIR/repr-no-niche-inapplicable-to-unions.rs:6:8
|
||||
|
|
||||
LL | #[repr(no_niche)]
|
||||
| ^^^^^^^^
|
||||
LL | pub union Cloaked1 { _A: N16 }
|
||||
| ------------------------------ not a struct or enum
|
||||
|
||||
error[E0517]: attribute should be applied to a struct or enum
|
||||
--> $DIR/repr-no-niche-inapplicable-to-unions.rs:10:8
|
||||
|
|
||||
LL | #[repr(no_niche)]
|
||||
| ^^^^^^^^
|
||||
LL | pub union Cloaked2 { _A: N16, _B: (u8, N8) }
|
||||
| -------------------------------------------- not a struct or enum
|
||||
|
||||
error: aborting due to 2 previous errors
|
||||
|
||||
For more information about this error, try `rustc --explain E0517`.
|
||||
|
|
@ -1,327 +0,0 @@
|
|||
// run-pass
|
||||
|
||||
// This file tests repr(no_niche), which causes an struct/enum to hide
|
||||
// any niche space that may exist in its internal state from the
|
||||
// context it appears in.
|
||||
|
||||
// Here are the axes this test is seeking to cover:
|
||||
//
|
||||
// repr annotation:
|
||||
// visible: (); cloaked: (no_niche); transparent: (transparent); shadowy: (transparent, no_niche)
|
||||
//
|
||||
// enum vs struct
|
||||
//
|
||||
// niche-type via type-parameter vs inline declaration
|
||||
|
||||
#![feature(decl_macro)]
|
||||
#![feature(no_niche)]
|
||||
|
||||
use std::mem::size_of;
|
||||
use std::num::{NonZeroU8, NonZeroU16};
|
||||
|
||||
mod struct_inline {
|
||||
use std::num::NonZeroU16 as N16;
|
||||
|
||||
#[derive(Debug)] pub struct Visible(N16);
|
||||
|
||||
#[repr(no_niche)]
|
||||
#[derive(Debug)] pub struct Cloaked(N16);
|
||||
|
||||
#[repr(transparent)]
|
||||
#[derive(Debug)] pub struct Transparent(N16);
|
||||
|
||||
#[repr(transparent, no_niche)]
|
||||
#[derive(Debug)] pub struct Shadowy(N16);
|
||||
}
|
||||
|
||||
mod struct_param {
|
||||
#[derive(Debug)] pub struct Visible<T>(T);
|
||||
|
||||
#[repr(no_niche)]
|
||||
#[derive(Debug)] pub struct Cloaked<T>(T);
|
||||
|
||||
#[repr(transparent)]
|
||||
#[derive(Debug)] pub struct Transparent<T>(T);
|
||||
|
||||
#[repr(transparent, no_niche)]
|
||||
#[derive(Debug)] pub struct Shadowy<T>(T);
|
||||
}
|
||||
|
||||
mod enum_inline {
|
||||
use crate::two_fifty_six_variant_enum;
|
||||
use std::num::{NonZeroU8 as N8, NonZeroU16 as N16};
|
||||
|
||||
#[derive(Debug)] pub enum Visible1 { _A(N16), }
|
||||
|
||||
#[repr(no_niche)]
|
||||
#[derive(Debug)] pub enum Cloaked1 { _A(N16), }
|
||||
|
||||
// (N.B.: transparent enums must be univariant)
|
||||
#[repr(transparent)]
|
||||
#[derive(Debug)] pub enum Transparent { _A(N16), }
|
||||
|
||||
#[repr(transparent, no_niche)]
|
||||
#[derive(Debug)] pub enum Shadowy { _A(N16), }
|
||||
|
||||
// including multivariant enums for completeness. Payload and
|
||||
// number of variants (i.e. discriminant size) have been chosen so
|
||||
// that layout including discriminant is 4 bytes, with no space in
|
||||
// padding to hide another discrimnant from the surrounding
|
||||
// context.
|
||||
//
|
||||
// (Note that multivariant enums cannot usefully expose a niche in
|
||||
// general; this test is relying on that.)
|
||||
two_fifty_six_variant_enum!(Visible2, N8);
|
||||
|
||||
two_fifty_six_variant_enum!(#[repr(no_niche)] Cloaked2, N8);
|
||||
}
|
||||
|
||||
mod enum_param {
|
||||
use super::two_fifty_six_variant_enum;
|
||||
|
||||
#[derive(Debug)] pub enum Visible1<T> { _A(T), }
|
||||
|
||||
#[repr(no_niche)]
|
||||
#[derive(Debug)] pub enum Cloaked1<T> { _A(T), }
|
||||
|
||||
// (N.B.: transparent enums must be univariant)
|
||||
#[repr(transparent)]
|
||||
#[derive(Debug)] pub enum Transparent<T> { _A(T), }
|
||||
|
||||
#[repr(transparent, no_niche)]
|
||||
#[derive(Debug)] pub enum Shadowy<T> { _A(T), }
|
||||
|
||||
// including multivariant enums for completeness. Same notes apply
|
||||
// here as above (assuming `T` is instantiated with `NonZeroU8`).
|
||||
two_fifty_six_variant_enum!(Visible2<T>);
|
||||
|
||||
two_fifty_six_variant_enum!(#[repr(no_niche)] Cloaked2<T>);
|
||||
}
|
||||
|
||||
fn main() {
|
||||
// sanity-checks
|
||||
assert_eq!(size_of::<struct_inline::Visible>(), 2);
|
||||
assert_eq!(size_of::<struct_inline::Cloaked>(), 2);
|
||||
assert_eq!(size_of::<struct_inline::Transparent>(), 2);
|
||||
assert_eq!(size_of::<struct_inline::Shadowy>(), 2);
|
||||
|
||||
assert_eq!(size_of::<struct_param::Visible<NonZeroU16>>(), 2);
|
||||
assert_eq!(size_of::<struct_param::Cloaked<NonZeroU16>>(), 2);
|
||||
assert_eq!(size_of::<struct_param::Transparent<NonZeroU16>>(), 2);
|
||||
assert_eq!(size_of::<struct_param::Shadowy<NonZeroU16>>(), 2);
|
||||
|
||||
assert_eq!(size_of::<enum_inline::Visible1>(), 2);
|
||||
assert_eq!(size_of::<enum_inline::Cloaked1>(), 2);
|
||||
assert_eq!(size_of::<enum_inline::Transparent>(), 2); // transparent enums are univariant
|
||||
assert_eq!(size_of::<enum_inline::Shadowy>(), 2);
|
||||
assert_eq!(size_of::<enum_inline::Visible2>(), 4);
|
||||
assert_eq!(size_of::<enum_inline::Cloaked2>(), 4);
|
||||
|
||||
assert_eq!(size_of::<enum_param::Visible1<NonZeroU16>>(), 2);
|
||||
assert_eq!(size_of::<enum_param::Cloaked1<NonZeroU16>>(), 2);
|
||||
assert_eq!(size_of::<enum_param::Transparent<NonZeroU16>>(), 2);
|
||||
assert_eq!(size_of::<enum_param::Shadowy<NonZeroU16>>(), 2);
|
||||
assert_eq!(size_of::<enum_param::Visible2<NonZeroU8>>(), 4);
|
||||
assert_eq!(size_of::<enum_param::Cloaked2<NonZeroU8>>(), 4);
|
||||
|
||||
// now the actual tests of no_niche: how do inputs above compose
|
||||
// with `Option` type constructor. The cases with a `_+2` are the
|
||||
// ones where no_niche fires.
|
||||
assert_eq!(size_of::<Option<struct_inline::Visible>>(), 2);
|
||||
assert_eq!(size_of::<Option<struct_inline::Cloaked>>(), 2+2);
|
||||
assert_eq!(size_of::<Option<struct_inline::Transparent>>(), 2);
|
||||
assert_eq!(size_of::<Option<struct_inline::Shadowy>>(), 2+2);
|
||||
|
||||
assert_eq!(size_of::<Option<struct_param::Visible<NonZeroU16>>>(), 2);
|
||||
assert_eq!(size_of::<Option<struct_param::Cloaked<NonZeroU16>>>(), 2+2);
|
||||
assert_eq!(size_of::<Option<struct_param::Transparent<NonZeroU16>>>(), 2);
|
||||
assert_eq!(size_of::<Option<struct_param::Shadowy<NonZeroU16>>>(), 2+2);
|
||||
|
||||
assert_eq!(size_of::<Option<enum_inline::Visible1>>(), 2);
|
||||
assert_eq!(size_of::<Option<enum_inline::Cloaked1>>(), 2+2);
|
||||
assert_eq!(size_of::<Option<enum_inline::Transparent>>(), 2);
|
||||
assert_eq!(size_of::<Option<enum_inline::Shadowy>>(), 2+2);
|
||||
// cannot use niche of multivariant payload
|
||||
assert_eq!(size_of::<Option<enum_inline::Visible2>>(), 4+2);
|
||||
assert_eq!(size_of::<Option<enum_inline::Cloaked2>>(), 4+2);
|
||||
|
||||
assert_eq!(size_of::<Option<enum_param::Visible1<NonZeroU16>>>(), 2);
|
||||
assert_eq!(size_of::<Option<enum_param::Cloaked1<NonZeroU16>>>(), 2+2);
|
||||
assert_eq!(size_of::<Option<enum_param::Transparent<NonZeroU16>>>(), 2);
|
||||
assert_eq!(size_of::<Option<enum_param::Shadowy<NonZeroU16>>>(), 2+2);
|
||||
// cannot use niche of multivariant payload
|
||||
assert_eq!(size_of::<Option<enum_param::Visible2<NonZeroU8>>>(), 4+2);
|
||||
assert_eq!(size_of::<Option<enum_param::Cloaked2<NonZeroU8>>>(), 4+2);
|
||||
}
|
||||
|
||||
macro two_fifty_six_variant_enum {
|
||||
($(#[$attr:meta])* $name:ident<$param:ident>) => {
|
||||
#[derive(Debug)] $(#[$attr])*
|
||||
pub enum $name<$param> {
|
||||
_V00($param, u16), _V01(u16, $param), _V02($param, u16), _V03(u16, $param),
|
||||
_V04($param, u16), _V05(u16, $param), _V06($param, u16), _V07(u16, $param),
|
||||
_V08($param, u16), _V09(u16, $param), _V0a($param, u16), _V0b(u16, $param),
|
||||
_V0c($param, u16), _V0d(u16, $param), _V0e($param, u16), _V0f(u16, $param),
|
||||
|
||||
_V10($param, u16), _V11(u16, $param), _V12($param, u16), _V13(u16, $param),
|
||||
_V14($param, u16), _V15(u16, $param), _V16($param, u16), _V17(u16, $param),
|
||||
_V18($param, u16), _V19(u16, $param), _V1a($param, u16), _V1b(u16, $param),
|
||||
_V1c($param, u16), _V1d(u16, $param), _V1e($param, u16), _V1f(u16, $param),
|
||||
|
||||
_V20($param, u16), _V21(u16, $param), _V22($param, u16), _V23(u16, $param),
|
||||
_V24($param, u16), _V25(u16, $param), _V26($param, u16), _V27(u16, $param),
|
||||
_V28($param, u16), _V29(u16, $param), _V2a($param, u16), _V2b(u16, $param),
|
||||
_V2c($param, u16), _V2d(u16, $param), _V2e($param, u16), _V2f(u16, $param),
|
||||
|
||||
_V30($param, u16), _V31(u16, $param), _V32($param, u16), _V33(u16, $param),
|
||||
_V34($param, u16), _V35(u16, $param), _V36($param, u16), _V37(u16, $param),
|
||||
_V38($param, u16), _V39(u16, $param), _V3a($param, u16), _V3b(u16, $param),
|
||||
_V3c($param, u16), _V3d(u16, $param), _V3e($param, u16), _V3f(u16, $param),
|
||||
|
||||
_V40($param, u16), _V41(u16, $param), _V42($param, u16), _V43(u16, $param),
|
||||
_V44($param, u16), _V45(u16, $param), _V46($param, u16), _V47(u16, $param),
|
||||
_V48($param, u16), _V49(u16, $param), _V4a($param, u16), _V4b(u16, $param),
|
||||
_V4c($param, u16), _V4d(u16, $param), _V4e($param, u16), _V4f(u16, $param),
|
||||
|
||||
_V50($param, u16), _V51(u16, $param), _V52($param, u16), _V53(u16, $param),
|
||||
_V54($param, u16), _V55(u16, $param), _V56($param, u16), _V57(u16, $param),
|
||||
_V58($param, u16), _V59(u16, $param), _V5a($param, u16), _V5b(u16, $param),
|
||||
_V5c($param, u16), _V5d(u16, $param), _V5e($param, u16), _V5f(u16, $param),
|
||||
|
||||
_V60($param, u16), _V61(u16, $param), _V62($param, u16), _V63(u16, $param),
|
||||
_V64($param, u16), _V65(u16, $param), _V66($param, u16), _V67(u16, $param),
|
||||
_V68($param, u16), _V69(u16, $param), _V6a($param, u16), _V6b(u16, $param),
|
||||
_V6c($param, u16), _V6d(u16, $param), _V6e($param, u16), _V6f(u16, $param),
|
||||
|
||||
_V70($param, u16), _V71(u16, $param), _V72($param, u16), _V73(u16, $param),
|
||||
_V74($param, u16), _V75(u16, $param), _V76($param, u16), _V77(u16, $param),
|
||||
_V78($param, u16), _V79(u16, $param), _V7a($param, u16), _V7b(u16, $param),
|
||||
_V7c($param, u16), _V7d(u16, $param), _V7e($param, u16), _V7f(u16, $param),
|
||||
|
||||
_V80($param, u16), _V81(u16, $param), _V82($param, u16), _V83(u16, $param),
|
||||
_V84($param, u16), _V85(u16, $param), _V86($param, u16), _V87(u16, $param),
|
||||
_V88($param, u16), _V89(u16, $param), _V8a($param, u16), _V8b(u16, $param),
|
||||
_V8c($param, u16), _V8d(u16, $param), _V8e($param, u16), _V8f(u16, $param),
|
||||
|
||||
_V90($param, u16), _V91(u16, $param), _V92($param, u16), _V93(u16, $param),
|
||||
_V94($param, u16), _V95(u16, $param), _V96($param, u16), _V97(u16, $param),
|
||||
_V98($param, u16), _V99(u16, $param), _V9a($param, u16), _V9b(u16, $param),
|
||||
_V9c($param, u16), _V9d(u16, $param), _V9e($param, u16), _V9f(u16, $param),
|
||||
|
||||
_Va0($param, u16), _Va1(u16, $param), _Va2($param, u16), _Va3(u16, $param),
|
||||
_Va4($param, u16), _Va5(u16, $param), _Va6($param, u16), _Va7(u16, $param),
|
||||
_Va8($param, u16), _Va9(u16, $param), _Vaa($param, u16), _Vab(u16, $param),
|
||||
_Vac($param, u16), _Vad(u16, $param), _Vae($param, u16), _Vaf(u16, $param),
|
||||
|
||||
_Vb0($param, u16), _Vb1(u16, $param), _Vb2($param, u16), _Vb3(u16, $param),
|
||||
_Vb4($param, u16), _Vb5(u16, $param), _Vb6($param, u16), _Vb7(u16, $param),
|
||||
_Vb8($param, u16), _Vb9(u16, $param), _Vba($param, u16), _Vbb(u16, $param),
|
||||
_Vbc($param, u16), _Vbd(u16, $param), _Vbe($param, u16), _Vbf(u16, $param),
|
||||
|
||||
_Vc0($param, u16), _Vc1(u16, $param), _Vc2($param, u16), _Vc3(u16, $param),
|
||||
_Vc4($param, u16), _Vc5(u16, $param), _Vc6($param, u16), _Vc7(u16, $param),
|
||||
_Vc8($param, u16), _Vc9(u16, $param), _Vca($param, u16), _Vcb(u16, $param),
|
||||
_Vcc($param, u16), _Vcd(u16, $param), _Vce($param, u16), _Vcf(u16, $param),
|
||||
|
||||
_Vd0($param, u16), _Vd1(u16, $param), _Vd2($param, u16), _Vd3(u16, $param),
|
||||
_Vd4($param, u16), _Vd5(u16, $param), _Vd6($param, u16), _Vd7(u16, $param),
|
||||
_Vd8($param, u16), _Vd9(u16, $param), _Vda($param, u16), _Vdb(u16, $param),
|
||||
_Vdc($param, u16), _Vdd(u16, $param), _Vde($param, u16), _Vdf(u16, $param),
|
||||
|
||||
_Ve0($param, u16), _Ve1(u16, $param), _Ve2($param, u16), _Ve3(u16, $param),
|
||||
_Ve4($param, u16), _Ve5(u16, $param), _Ve6($param, u16), _Ve7(u16, $param),
|
||||
_Ve8($param, u16), _Ve9(u16, $param), _Vea($param, u16), _Veb(u16, $param),
|
||||
_Vec($param, u16), _Ved(u16, $param), _Vee($param, u16), _Vef(u16, $param),
|
||||
|
||||
_Vf0($param, u16), _Vf1(u16, $param), _Vf2($param, u16), _Vf3(u16, $param),
|
||||
_Vf4($param, u16), _Vf5(u16, $param), _Vf6($param, u16), _Vf7(u16, $param),
|
||||
_Vf8($param, u16), _Vf9(u16, $param), _Vfa($param, u16), _Vfb(u16, $param),
|
||||
_Vfc($param, u16), _Vfd(u16, $param), _Vfe($param, u16), _Vff(u16, $param),
|
||||
}
|
||||
},
|
||||
|
||||
($(#[$attr:meta])* $name:ident, $param:ty) => {
|
||||
#[derive(Debug)] $(#[$attr])*
|
||||
pub enum $name {
|
||||
_V00($param, u16), _V01(u16, $param), _V02($param, u16), _V03(u16, $param),
|
||||
_V04($param, u16), _V05(u16, $param), _V06($param, u16), _V07(u16, $param),
|
||||
_V08($param, u16), _V09(u16, $param), _V0a($param, u16), _V0b(u16, $param),
|
||||
_V0c($param, u16), _V0d(u16, $param), _V0e($param, u16), _V0f(u16, $param),
|
||||
|
||||
_V10($param, u16), _V11(u16, $param), _V12($param, u16), _V13(u16, $param),
|
||||
_V14($param, u16), _V15(u16, $param), _V16($param, u16), _V17(u16, $param),
|
||||
_V18($param, u16), _V19(u16, $param), _V1a($param, u16), _V1b(u16, $param),
|
||||
_V1c($param, u16), _V1d(u16, $param), _V1e($param, u16), _V1f(u16, $param),
|
||||
|
||||
_V20($param, u16), _V21(u16, $param), _V22($param, u16), _V23(u16, $param),
|
||||
_V24($param, u16), _V25(u16, $param), _V26($param, u16), _V27(u16, $param),
|
||||
_V28($param, u16), _V29(u16, $param), _V2a($param, u16), _V2b(u16, $param),
|
||||
_V2c($param, u16), _V2d(u16, $param), _V2e($param, u16), _V2f(u16, $param),
|
||||
|
||||
_V30($param, u16), _V31(u16, $param), _V32($param, u16), _V33(u16, $param),
|
||||
_V34($param, u16), _V35(u16, $param), _V36($param, u16), _V37(u16, $param),
|
||||
_V38($param, u16), _V39(u16, $param), _V3a($param, u16), _V3b(u16, $param),
|
||||
_V3c($param, u16), _V3d(u16, $param), _V3e($param, u16), _V3f(u16, $param),
|
||||
|
||||
_V40($param, u16), _V41(u16, $param), _V42($param, u16), _V43(u16, $param),
|
||||
_V44($param, u16), _V45(u16, $param), _V46($param, u16), _V47(u16, $param),
|
||||
_V48($param, u16), _V49(u16, $param), _V4a($param, u16), _V4b(u16, $param),
|
||||
_V4c($param, u16), _V4d(u16, $param), _V4e($param, u16), _V4f(u16, $param),
|
||||
|
||||
_V50($param, u16), _V51(u16, $param), _V52($param, u16), _V53(u16, $param),
|
||||
_V54($param, u16), _V55(u16, $param), _V56($param, u16), _V57(u16, $param),
|
||||
_V58($param, u16), _V59(u16, $param), _V5a($param, u16), _V5b(u16, $param),
|
||||
_V5c($param, u16), _V5d(u16, $param), _V5e($param, u16), _V5f(u16, $param),
|
||||
|
||||
_V60($param, u16), _V61(u16, $param), _V62($param, u16), _V63(u16, $param),
|
||||
_V64($param, u16), _V65(u16, $param), _V66($param, u16), _V67(u16, $param),
|
||||
_V68($param, u16), _V69(u16, $param), _V6a($param, u16), _V6b(u16, $param),
|
||||
_V6c($param, u16), _V6d(u16, $param), _V6e($param, u16), _V6f(u16, $param),
|
||||
|
||||
_V70($param, u16), _V71(u16, $param), _V72($param, u16), _V73(u16, $param),
|
||||
_V74($param, u16), _V75(u16, $param), _V76($param, u16), _V77(u16, $param),
|
||||
_V78($param, u16), _V79(u16, $param), _V7a($param, u16), _V7b(u16, $param),
|
||||
_V7c($param, u16), _V7d(u16, $param), _V7e($param, u16), _V7f(u16, $param),
|
||||
|
||||
_V80($param, u16), _V81(u16, $param), _V82($param, u16), _V83(u16, $param),
|
||||
_V84($param, u16), _V85(u16, $param), _V86($param, u16), _V87(u16, $param),
|
||||
_V88($param, u16), _V89(u16, $param), _V8a($param, u16), _V8b(u16, $param),
|
||||
_V8c($param, u16), _V8d(u16, $param), _V8e($param, u16), _V8f(u16, $param),
|
||||
|
||||
_V90($param, u16), _V91(u16, $param), _V92($param, u16), _V93(u16, $param),
|
||||
_V94($param, u16), _V95(u16, $param), _V96($param, u16), _V97(u16, $param),
|
||||
_V98($param, u16), _V99(u16, $param), _V9a($param, u16), _V9b(u16, $param),
|
||||
_V9c($param, u16), _V9d(u16, $param), _V9e($param, u16), _V9f(u16, $param),
|
||||
|
||||
_Va0($param, u16), _Va1(u16, $param), _Va2($param, u16), _Va3(u16, $param),
|
||||
_Va4($param, u16), _Va5(u16, $param), _Va6($param, u16), _Va7(u16, $param),
|
||||
_Va8($param, u16), _Va9(u16, $param), _Vaa($param, u16), _Vab(u16, $param),
|
||||
_Vac($param, u16), _Vad(u16, $param), _Vae($param, u16), _Vaf(u16, $param),
|
||||
|
||||
_Vb0($param, u16), _Vb1(u16, $param), _Vb2($param, u16), _Vb3(u16, $param),
|
||||
_Vb4($param, u16), _Vb5(u16, $param), _Vb6($param, u16), _Vb7(u16, $param),
|
||||
_Vb8($param, u16), _Vb9(u16, $param), _Vba($param, u16), _Vbb(u16, $param),
|
||||
_Vbc($param, u16), _Vbd(u16, $param), _Vbe($param, u16), _Vbf(u16, $param),
|
||||
|
||||
_Vc0($param, u16), _Vc1(u16, $param), _Vc2($param, u16), _Vc3(u16, $param),
|
||||
_Vc4($param, u16), _Vc5(u16, $param), _Vc6($param, u16), _Vc7(u16, $param),
|
||||
_Vc8($param, u16), _Vc9(u16, $param), _Vca($param, u16), _Vcb(u16, $param),
|
||||
_Vcc($param, u16), _Vcd(u16, $param), _Vce($param, u16), _Vcf(u16, $param),
|
||||
|
||||
_Vd0($param, u16), _Vd1(u16, $param), _Vd2($param, u16), _Vd3(u16, $param),
|
||||
_Vd4($param, u16), _Vd5(u16, $param), _Vd6($param, u16), _Vd7(u16, $param),
|
||||
_Vd8($param, u16), _Vd9(u16, $param), _Vda($param, u16), _Vdb(u16, $param),
|
||||
_Vdc($param, u16), _Vdd(u16, $param), _Vde($param, u16), _Vdf(u16, $param),
|
||||
|
||||
_Ve0($param, u16), _Ve1(u16, $param), _Ve2($param, u16), _Ve3(u16, $param),
|
||||
_Ve4($param, u16), _Ve5(u16, $param), _Ve6($param, u16), _Ve7(u16, $param),
|
||||
_Ve8($param, u16), _Ve9(u16, $param), _Vea($param, u16), _Veb(u16, $param),
|
||||
_Vec($param, u16), _Ved(u16, $param), _Vee($param, u16), _Vef(u16, $param),
|
||||
|
||||
_Vf0($param, u16), _Vf1(u16, $param), _Vf2($param, u16), _Vf3(u16, $param),
|
||||
_Vf4($param, u16), _Vf5(u16, $param), _Vf6($param, u16), _Vf7(u16, $param),
|
||||
_Vf8($param, u16), _Vf9(u16, $param), _Vfa($param, u16), _Vfb(u16, $param),
|
||||
_Vfc($param, u16), _Vfd(u16, $param), _Vfe($param, u16), _Vff(u16, $param),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -148,7 +148,7 @@ fn inner<'tcx>(cx: &LateContext<'tcx>, val: mir::ConstantKind<'tcx>) -> bool {
|
|||
match val.ty().kind() {
|
||||
// the fact that we have to dig into every structs to search enums
|
||||
// leads us to the point checking `UnsafeCell` directly is the only option.
|
||||
ty::Adt(ty_def, ..) if Some(ty_def.did()) == cx.tcx.lang_items().unsafe_cell_type() => true,
|
||||
ty::Adt(ty_def, ..) if ty_def.is_unsafe_cell() => true,
|
||||
ty::Array(..) | ty::Adt(..) | ty::Tuple(..) => {
|
||||
let val = cx.tcx.destructure_mir_constant(cx.param_env, val);
|
||||
val.fields.iter().any(|field| inner(cx, *field))
|
||||
|
|
|
|||
Loading…
Reference in a new issue