[libcxx-commits] [libcxx] [libc++] Fix ambiguous call in {ranges, std}::find (PR #122641)

[Peng Liu via libcxx-commits]

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@@ -38,29 +40,82 @@ _LIBCPP_BEGIN_NAMESPACE_STD
   return __builtin_ctzll(__x);
 }
 
+#ifndef _LIBCPP_CXX03_LANG
+// constexpr implementation for C++11 and later
+
+// Precondition: __t != 0 (the caller __countr_zero handles __t == 0 as a special case)
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winner245 wrote:

A `_LIBCPP_ASSERT_INTERNAL` assertion has been added to make the precondition more explicit. 

https://github.com/llvm/llvm-project/pull/122641