bors c6e3d7fa31 Auto merge of #53508 - japaric:maybe-uninit, r=RalfJung ...

Implement `MaybeUninit`

This PR:

- Adds `MaybeUninit` (see #53491) to `{core,std}::mem`.
- Makes `mem::{uninitialized,zeroed}` panic when they are used to instantiate an uninhabited type.
- Does *not* deprecate `mem::{uninitialized,zeroed}` just yet. As per https://github.com/rust-lang/rust/issues/53491#issuecomment-414147666, we should not deprecate them until `MaybeUninit` is stabilized.
- It replaces uses of `mem::{uninitialized,zeroed}` in core and alloc with `MaybeUninit`.

There are still several instances of `mem::{uninitialized,zeroed}` in `std` that *this* PR doesn't address.

r? @RalfJung
cc @eddyb you may want to look at the new panicking logic

2018-09-22 23:08:03 +00:00

..

cast.rs

make ptr_op finally reponsible for all ops involving pointers; make ValTy constructor private

2018-08-29 08:44:37 +02:00

eval_context.rs

miri loop detector hashing: fix enum hashing to also consider discriminant; do not hash extra machine state

2018-09-09 10:53:36 +02:00

intrinsics.rs

Use binary_op_val instead of doing the check manually.

2018-09-06 15:11:56 +02:00

machine.rs

miri loop detector hashing: fix enum hashing to also consider discriminant; do not hash extra machine state

2018-09-09 10:53:36 +02:00

memory.rs

keep around some information for dead allocations so that we can use it to make sure a dangling ptr aligned and non-NULL

2018-09-15 16:34:30 +02:00

mod.rs

Move EvalSnapshot into its own module

2018-09-03 20:02:35 +02:00

operand.rs

use is_uninhabited in more places

2018-09-22 21:01:21 +02:00

operator.rs

make ptr_op finally reponsible for all ops involving pointers; make ValTy constructor private

2018-08-29 08:44:37 +02:00

place.rs

miri: correctly compute expected alignment for field

2018-09-17 18:05:17 +02:00

snapshot.rs

miri loop detector hashing: fix enum hashing to also consider discriminant; do not hash extra machine state

2018-09-09 10:53:36 +02:00

step.rs

Refactor 'ReadForMatch' into 'FakeRead' and add the cause of the fake read

2018-09-18 14:36:37 +02:00

terminator.rs

renamed mk_nil to mk_unit

2018-09-10 11:07:13 +09:00

traits.rs

move some Scalar helpers from miri here, and use them where appropriate

2018-08-29 08:44:37 +02:00

validity.rs

Optimize miri checking of integer array/slices

2018-09-08 07:13:19 +03:00