[Bug libstdc++/104602] std::source_location::current uses cast from void*

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104602

--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
We can make that more readable:

--- a/libstdc++-v3/include/std/source_location
+++ b/libstdc++-v3/include/std/source_location
@@ -43,12 +43,13 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   {
   private:
     using uint_least32_t = __UINT_LEAST32_TYPE__;
+    using __builtin_ret_type = decltype(__builtin_source_location());

   public:

     // [support.srcloc.cons], creation
     static consteval source_location
-    current(const void* __p = __builtin_source_location()) noexcept
+    current(__builtin_ret_type __p = __builtin_source_location()) noexcept
     {
       source_location __ret;
       __ret._M_impl = static_cast <const __impl*>(__p);