[libc++] Use a different smart ptr type alias

The `_SP` type is used by some C libraries and this alias could conflict
with it.

Author: androm3da

libcxx/include/__memory/inout_ptr.h

@@ -63,17 +63,17 @@ class _LIBCPP_TEMPLATE_VIS inout_ptr_t {
       }
     }
 
-    using _SP = __pointer_of_or_t<_Smart, _Pointer>;
+    using _SmartPtr = __pointer_of_or_t<_Smart, _Pointer>;
     if constexpr (is_pointer_v<_Smart>) {
-      std::apply([&](auto&&... __args) { __s_ = _Smart(static_cast<_SP>(__p_), std::forward<_Args>(__args)...); },
+      std::apply([&](auto&&... __args) { __s_ = _Smart(static_cast<_SmartPtr>(__p_), std::forward<_Args>(__args)...); },
                  std::move(__a_));
     } else if constexpr (__resettable_smart_pointer_with_args<_Smart, _Pointer, _Args...>) {
-      std::apply([&](auto&&... __args) { __s_.reset(static_cast<_SP>(__p_), std::forward<_Args>(__args)...); },
+      std::apply([&](auto&&... __args) { __s_.reset(static_cast<_SmartPtr>(__p_), std::forward<_Args>(__args)...); },
                  std::move(__a_));
     } else {
-      static_assert(is_constructible_v<_Smart, _SP, _Args...>,
+      static_assert(is_constructible_v<_Smart, _SmartPtr, _Args...>,
                     "The smart pointer must be constructible from arguments of types _Smart, _Pointer, _Args...");
-      std::apply([&](auto&&... __args) { __s_ = _Smart(static_cast<_SP>(__p_), std::forward<_Args>(__args)...); },
+      std::apply([&](auto&&... __args) { __s_ = _Smart(static_cast<_SmartPtr>(__p_), std::forward<_Args>(__args)...); },
                  std::move(__a_));
     }
   }

libcxx/include/__memory/out_ptr.h

@@ -58,14 +58,14 @@ class _LIBCPP_TEMPLATE_VIS out_ptr_t {
       return;
     }
 
-    using _SP = __pointer_of_or_t<_Smart, _Pointer>;
+    using _SmartPtr = __pointer_of_or_t<_Smart, _Pointer>;
     if constexpr (__resettable_smart_pointer_with_args<_Smart, _Pointer, _Args...>) {
-      std::apply([&](auto&&... __args) { __s_.reset(static_cast<_SP>(__p_), std::forward<_Args>(__args)...); },
+      std::apply([&](auto&&... __args) { __s_.reset(static_cast<_SmartPtr>(__p_), std::forward<_Args>(__args)...); },
                  std::move(__a_));
     } else {
-      static_assert(is_constructible_v<_Smart, _SP, _Args...>,
+      static_assert(is_constructible_v<_Smart, _SmartPtr, _Args...>,
                     "The smart pointer must be constructible from arguments of types _Smart, _Pointer, _Args...");
-      std::apply([&](auto&&... __args) { __s_ = _Smart(static_cast<_SP>(__p_), std::forward<_Args>(__args)...); },
+      std::apply([&](auto&&... __args) { __s_ = _Smart(static_cast<_SmartPtr>(__p_), std::forward<_Args>(__args)...); },
                  std::move(__a_));
     }
   }