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9fed13030c
Extend ptr::null and null_mut to all thin (including extern) types Fixes https://github.com/rust-lang/rust/issues/93959 This change was accepted in https://rust-lang.github.io/rfcs/2580-ptr-meta.html Note that this changes the signature of **stable** functions. The change should be backward-compatible, but it is **insta-stable** since it cannot (easily, at all?) be made available only through a `#![feature(…)]` opt-in. The RFC also proposed the same change for `NonNull::dangling`, which makes sense it terms of its signature but not in terms of its implementation. `dangling` uses `align_of()` as an address. But what `align_of()` should be for extern types or whether it should be allowed at all remains an open question. This commit depends on https://github.com/rust-lang/rust/pull/93977, which is not yet part of the bootstrap compiler. So `#[cfg]` is used to only apply the change in stage 1+. As far a I know bounds cannot be made conditional with `#[cfg]`, so the entire functions are duplicated. This is unfortunate but temporary. Since this duplication makes it less obvious in the diff, the new definitions differ in: * More permissive bounds (`Thin` instead of implied `Sized`) * Different implementation * Having `rustc_allow_const_fn_unstable(const_fn_trait_bound)` * Having `rustc_allow_const_fn_unstable(ptr_metadata)` |
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| fmt | ||
| hash | ||
| iter | ||
| num | ||
| ops | ||
| alloc.rs | ||
| any.rs | ||
| array.rs | ||
| ascii.rs | ||
| asserting.rs | ||
| atomic.rs | ||
| bool.rs | ||
| cell.rs | ||
| char.rs | ||
| clone.rs | ||
| cmp.rs | ||
| const_ptr.rs | ||
| convert.rs | ||
| future.rs | ||
| intrinsics.rs | ||
| lazy.rs | ||
| lib.rs | ||
| macros.rs | ||
| manually_drop.rs | ||
| mem.rs | ||
| nonzero.rs | ||
| ops.rs | ||
| option.rs | ||
| pattern.rs | ||
| pin.rs | ||
| pin_macro.rs | ||
| ptr.rs | ||
| result.rs | ||
| simd.rs | ||
| slice.rs | ||
| str.rs | ||
| str_lossy.rs | ||
| task.rs | ||
| time.rs | ||
| tuple.rs | ||
| unicode.rs | ||
| waker.rs | ||