bors 7200da0217 Auto merge of #93873 - Stovent:big-ints, r=m-ou-se
Reimplement `carrying_add` and `borrowing_sub` for signed integers.

As per the discussion in #85532, this PR reimplements `carrying_add` and `borrowing_sub` for signed integers.

It also adds unit tests for both unsigned and signed integers, emphasing on the behaviours of the methods.
2022-09-09 00:59:08 +00:00
..
2022-04-11 07:37:53 +01:00
2022-04-18 23:28:06 +02:00