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Mutable indexing doesn't seem to work #278
Description
Activity
It's impossible for a BitSlice to return a
&mut boolthrough indexing since it doesn't contain anyboolvalue. It only works with immutable indexing because it returns references to global&falseand&trueconstant values.True, but it could return something that is
impl DerefMut<Output = bool>, achieving mostly the same resultThat might be a bit odd to use, but indeed, that could work.
True, but it could return something that is
impl DerefMut<Output = bool>, achieving mostly the same resultI think it would also have to
impl Drop.DerefMutwould return a temporary&mut bool, but we want to write the mutated value back to the original bit location. And there's no way to write directly to a bit using a&mut bool.So
bitveccould run the bit writing code usingDrop, or a "persist" method you have to call on the returned type.
I use
BitArray<[u8; _]>as a container and then trying to index into it.Immutable indexing to return
&boolworks just fine, but attempt to return&mut boolfails:Not sure what the reason of this is, but it is unexpected for sure.