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

[Konstantin Varlamov via libcxx-commits]

Jan =?utf-8?q?Kokem=C3=BCller?= <jan.kokemueller at gmail.com>,
Jan =?utf-8?q?Kokem=C3=BCller?= <jan.kokemueller at gmail.com>
Message-ID:
In-Reply-To: <llvm.org/llvm/llvm-project/pull/84126 at github.com>


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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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var-const wrote:

Question: can you briefly explain why this case is special?

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