rust/tests/ui/transmutability/maybeuninit.stderr
Jack Wrenn 1ad218f3af safe transmute: Rename BikeshedIntrinsicFrom to TransmuteFrom
As our implementation of MCP411 nears completion and we begin to
solicit testing, it's no longer reasonable to expect testers to
type or remember `BikeshedIntrinsicFrom`. The name degrades the
ease-of-reading of documentation, and the overall experience of
using compiler safe transmute.

Tentatively, we'll instead adopt `TransmuteFrom`.

This name seems to be the one most likely to be stabilized, after
discussion on Zulip [1]. We may want to revisit the ordering of
`Src` and `Dst` before stabilization, at which point we'd likely
consider `TransmuteInto` or `Transmute`.

[1] https://rust-lang.zulipchat.com/#narrow/stream/216762-project-safe-transmute/topic/What.20should.20.60BikeshedIntrinsicFrom.60.20be.20named.3F
2024-08-27 14:05:54 +00:00

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error[E0277]: `MaybeUninit<u8>` cannot be safely transmuted into `u8`
--> $DIR/maybeuninit.rs:21:54
|
LL | assert::is_maybe_transmutable::<MaybeUninit<u8>, u8>();
| ^^ at least one value of `MaybeUninit<u8>` isn't a bit-valid value of `u8`
|
note: required by a bound in `is_maybe_transmutable`
--> $DIR/maybeuninit.rs:12:14
|
LL | pub fn is_maybe_transmutable<Src, Dst>()
| --------------------- required by a bound in this function
LL | where
LL | Dst: TransmuteFrom<Src, { Assume::SAFETY }>
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `is_maybe_transmutable`
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0277`.