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12 Commits

Author SHA1 Message Date
Alan Egerton
9208c08a77
Use liballoc's specialised in-place vec collection 
liballoc already specialises in-place vector collection, so manually
reimplementing it in `IdFunctor::try_map_id` was superfluous.
 2022-06-08 12:14:49 +01:00
Alan Egerton
acd39ff0fe
Make IdFunctor::try_map_id panic-safe 2021-12-07 11:11:23 +00:00
Matthias Krüger
31003a3089
Rollup merge of #88906 - Kixunil:box-maybe-uninit-write, r=dtolnay 
Implement write() method for Box<MaybeUninit<T>>

This adds method similar to `MaybeUninit::write` main difference being
it returns owned `Box`. This can be used to elide copy from stack
safely, however it's not currently tested that the optimization actually
occurs.

Analogous methods are not provided for `Rc` and `Arc` as those need to
handle the possibility of sharing. Some version of them may be added in
the future.

This was discussed in #63291 which this change extends.
 2021-12-03 06:24:11 +01:00
Martin Habovstiak
41e21aa1c2 Implement write() method for Box<MaybeUninit<T>> 
This adds method similar to `MaybeUninit::write` main difference being
it returns owned `Box`. This can be used to elide copy from stack
safely, however it's not currently tested that the optimization actually
occurs.

Analogous methods are not provided for `Rc` and `Arc` as those need to
handle the possibility of sharing. Some version of them may be added in
the future.

This was discussed in #63291 which this change extends.
 2021-12-02 17:18:34 +01:00
Alan Egerton
db7295fa96
Remove no-longer used IdFunctor::map_id 2021-12-02 15:45:40 +00:00
Alan Egerton
afa6f92c46
Use intrinsic pointer methods 2021-11-27 16:59:18 +00:00
Alan Egerton
9f714ef035
Delegate from map_id to try_map_id 2021-11-27 16:55:21 +00:00
Alan Egerton
04f1c09f90
Avoid UB when short-circuiting try_map_id for Vec 2021-11-27 15:06:06 +00:00
LeSeulArtichaut
6e3fa20b00
Make TypeFoldable implementors short-circuit on error 
Co-authored-by: Alan Egerton <eggyal@gmail.com>
 2021-11-26 07:17:59 +00:00
est31
403b80d32e Use MaybeUninit::write in functor.rs 
MaybeUninit::write is stable as of 1.55.0.
 2021-08-30 17:23:49 +02:00
lcnr
a6cbd64dae words 2020-11-16 22:42:09 +01:00
Bastian Kauschke
3ec6720bf1 add IdFunctor to rustc_data_structures 2020-11-16 22:27:20 +01:00