[libc++] Use a different smart ptr type alias (#102089)

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

(cherry picked from commit 7951673)

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_));
     }
   }

libcxx/test/libcxx/system_reserved_names.gen.py

@@ -17,7 +17,8 @@
 from libcxx.header_information import lit_header_restrictions, public_headers
 
 for header in public_headers:
-  print(f"""\
+    print(
+        f"""\
 //--- {header}.compile.pass.cpp
 {lit_header_restrictions.get(header, '')}
 
@@ -162,6 +163,18 @@
 #define erase SYSTEM_RESERVED_NAME
 #define refresh SYSTEM_RESERVED_NAME
 
+// Dinkumware libc ctype.h uses these definitions
+#define _XA SYSTEM_RESERVED_NAME
+#define _XS SYSTEM_RESERVED_NAME
+#define _BB SYSTEM_RESERVED_NAME
+#define _CN SYSTEM_RESERVED_NAME
+#define _DI SYSTEM_RESERVED_NAME
+#define _LO SYSTEM_RESERVED_NAME
+#define _PU SYSTEM_RESERVED_NAME
+#define _SP SYSTEM_RESERVED_NAME
+#define _UP SYSTEM_RESERVED_NAME
+#define _XD SYSTEM_RESERVED_NAME
+
 #include <{header}>
 
 // Make sure we don't swallow the definition of the macros we push/pop
@@ -172,4 +185,5 @@
 static_assert(__builtin_strcmp(STRINGIFY(move), STRINGIFY(SYSTEM_RESERVED_NAME)) == 0, "");
 static_assert(__builtin_strcmp(STRINGIFY(erase), STRINGIFY(SYSTEM_RESERVED_NAME)) == 0, "");
 static_assert(__builtin_strcmp(STRINGIFY(refresh), STRINGIFY(SYSTEM_RESERVED_NAME)) == 0, "");
-""")
+"""
+    )