Add [A]RcBorrow -> Weak conversion without strong clone #59
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Also includes a
cargo update
and adjusts removes unneccessary use of autocfg.Closes #58, cc @yvt: do you have any other suggestions for what this method should be called?
If I could go back in time, it would be
$RcBorrow::upgrade(Self) -> $Rc
,$RcBorrow::downgrade(Self) -> $Weak
, and$RcBorrow::extend(Self) -> &'a T
, but that ship has sailed.It might still be worth it to deprecate
downgrade
and replace it withextend
or some other better name, asdowngrade
does not match context, where the point is to get a longer-lived reference.