add Cell::as_array_of_cells, similar to Cell::as_slice_of_cells #87944
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r? @scottmcm (rust-highfive has picked a reviewer for you, use r? to override) |
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I've put a standalone version of this function in this repo: https://github.com/oconnor663/cell_utils |
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@scottmcm should I add someone else to review? |
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Sorry for being slow. This seems perfectly reasonable to me, given that it's already possible (much less nicely) by going through slices. Can you open a Library Tracking Issue for it, and add that to the |
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Previously, converting `&mut [T; N]` to `&[Cell<T>; N]` looks like this:
let array = &mut [1, 2, 3];
let cells: &[Cell<i32>; 3] = Cell::from_mut(&mut array[..])
.as_slice_of_cells()
.try_into()
.unwrap();
With this new helper method, it looks like this:
let array = &mut [1, 2, 3];
let cells: &[Cell<i32>; 3] = Cell::from_mut(array).as_array_of_cells();
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No worries. Done! |
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@bors r+ |
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📌 Commit 9c44d80 has been approved by |
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Aug 25, 2021
…eulArtichaut Rollup of 16 pull requests Successful merges: - rust-lang#87944 (add Cell::as_array_of_cells, similar to Cell::as_slice_of_cells) - rust-lang#88156 (Adjust / fix documentation of `Arc::make_mut`) - rust-lang#88157 (bootstrap.py: recognize riscv64 when auto-detect) - rust-lang#88196 (Refactor `named_asm_labels` to a HIR lint) - rust-lang#88218 (Remove `Session.trait_methods_not_found`) - rust-lang#88223 (Remove the `TryV2` alias) - rust-lang#88226 (Fix typo “a Rc” → “an Rc” (and a few more)) - rust-lang#88267 (2229: Update signature for truncate function) - rust-lang#88273 (Fix references to `ControlFlow` in docs) - rust-lang#88277 (Update books) - rust-lang#88291 (Add SAFETY comments to core::slice::sort::partition_in_blocks) - rust-lang#88293 (Fix grammar in alloc test) - rust-lang#88298 (Errorkind reorder) - rust-lang#88299 (Stabilise BufWriter::into_parts) - rust-lang#88314 (Add type of a let tait test) - rust-lang#88325 (Add mutable-noalias to the release notes for 1.54) Failed merges: r? `@ghost` `@rustbot` modify labels: rollup
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I'd like to propose adding
Cell::as_array_of_cells, as a natural analog toCell::as_slice_of_cells. I don't have a specific use case in mind, other than that supporting slices but not arrays feels like a gap. Do other folks agree with that intuition? Would this addition be substantial enough to need an RFC?Previously, converting
&mut [T; N]to&[Cell<T>; N]looks like this:With this new helper method, it looks like this: