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Initial UnsafePinned/UnsafeUnpin impl [Part 1: Libs]

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Sky 2025-02-14 15:56:24 -05:00
parent ae06b79dcb
commit 21b7360a9a
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11 changed files with 290 additions and 8 deletions
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13
compiler/rustc_middle/src/ty/adt.rs
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@ -53,6 +53,10 @@ bitflags::bitflags! {
const IS_VARIANT_LIST_NON_EXHAUSTIVE = 1 << 8;
/// Indicates whether the type is `UnsafeCell`.
const IS_UNSAFE_CELL = 1 << 9;
/// Indicates whether the type is `UnsafePinned`.
const IS_UNSAFE_PINNED = 1 << 10;
/// Indicates whether the type is anonymous.
const IS_ANONYMOUS = 1 << 11;
}
}
rustc_data_structures::external_bitflags_debug! { AdtFlags }
@ -302,6 +306,9 @@ impl AdtDefData {
if tcx.is_lang_item(did, LangItem::UnsafeCell) {
flags |= AdtFlags::IS_UNSAFE_CELL;
}
if tcx.is_lang_item(did, LangItem::UnsafePinned) {
flags |= AdtFlags::IS_UNSAFE_PINNED;
}
AdtDefData { did, variants, flags, repr }
}
@ -405,6 +412,12 @@ impl<'tcx> AdtDef<'tcx> {
self.flags().contains(AdtFlags::IS_UNSAFE_CELL)
}
/// Returns `true` if this is `UnsafePinned<T>`.
#[inline]
pub fn is_unsafe_pinned(self) -> bool {
self.flags().contains(AdtFlags::IS_UNSAFE_PINNED)
}
/// Returns `true` if this is `ManuallyDrop<T>`.
#[inline]
pub fn is_manually_drop(self) -> bool {