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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/104602] std::source_location::current uses cast from
 void*
Date: Mon, 21 Feb 2022 21:06:24 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D104602

--- 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 =3D __UINT_LEAST32_TYPE__;
+    using __builtin_ret_type =3D decltype(__builtin_source_location());

   public:

     // [support.srcloc.cons], creation
     static consteval source_location
-    current(const void* __p =3D __builtin_source_location()) noexcept
+    current(__builtin_ret_type __p =3D __builtin_source_location()) noexce=
pt
     {
       source_location __ret;
       __ret._M_impl =3D static_cast <const __impl*>(__p);=