[libcxx-commits] [libcxx] [libc++][ranges] add static_assert for ranges::to (PR #135802)

[Nikolas Klauser via libcxx-commits]

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@@ -81,7 +83,7 @@ template <class _Container, input_range _Range, class... _Args>
   static_assert(!is_const_v<_Container>, "The target container cannot be const-qualified, please remove the const");
   static_assert(
       !is_volatile_v<_Container>, "The target container cannot be volatile-qualified, please remove the volatile");
-
+  static_assert(is_class_v<_Container> || is_union_v<_Container>, "The target must be a class type");
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philnik777 wrote:

I think it would be better to say "must be a class or union". Most people don't know that a class type is a class or union.

https://github.com/llvm/llvm-project/pull/135802