[libcxx-commits] [libcxx] [libc++] `std::ranges::advance`: avoid unneeded bounds checks when advancing iterator (PR #84126)

[Jan Kokemüller via libcxx-commits]

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@@ -213,6 +221,20 @@ constexpr bool test() {
     assert(i == iota_iterator{INT_MIN+1});
   }
 
+  // Check that we don't do an unneeded bounds check when decrementing a
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jiixyj wrote:

OK, I've removed that misleading comment for the `check_backward` tests and adapted them to take bidirectional iterators. Then, I could also remove my "special case" test I had added, since the `check_backward` tests now cover the "decrement one by one" case as well.

https://github.com/llvm/llvm-project/pull/84126