commit c41d68051535fe62e3f22ab9c32b9652f6de437d
author Louis Dionne <ldionne.2@gmail.com> Tue Aug 10 11:35:27 2021 -0400
committer Copybara-Service <copybara-worker@google.com> Wed Aug 11 07:15:11 2021 -0700
tree ee536df327936cfca0e9e810c4c128e5e4f2af74
parent 6f7ea22cc3b287d9a88bd6312077f351250edf0d

[libc++] Remove _LIBCPP_HAS_UNIQUE_OBJECT_REPRESENTATIONS

All supported compilers have implemented __has_unique_object_representations
for a while, so it's reasonable to remove the workaround.

Differential Revision: https://reviews.llvm.org/D107834

NOKEYCHECK=True
GitOrigin-RevId: 15071d2945405f00cf41fc9a48122732e9c42bc3

include/__config

diff --git a/include/__config b/include/__config
index a0b645c..ca7d9ed 100644
--- a/include/__config
+++ b/include/__config
@@ -510,10 +510,6 @@
 #define _LIBCPP_COMPILER_HAS_BUILTIN_CONSTANT_P
 #endif
 
-#if !__is_identifier(__has_unique_object_representations)
-#define _LIBCPP_HAS_UNIQUE_OBJECT_REPRESENTATIONS
-#endif
-
 #define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__))
 
 // Literal operators ""d and ""y are supported starting with LLVM Clang 8 and AppleClang 10.0.1
@@ -552,7 +548,6 @@
 #if _GNUC_VER >= 700
 #define _LIBCPP_COMPILER_HAS_BUILTIN_LAUNDER
 #define _LIBCPP_COMPILER_HAS_BUILTIN_CONSTANT_P
-#define _LIBCPP_HAS_UNIQUE_OBJECT_REPRESENTATIONS
 #endif
 
 #define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__))

include/type_traits

diff --git a/include/type_traits b/include/type_traits
index 0d060b6..af2f620 100644
--- a/include/type_traits
+++ b/include/type_traits
@@ -1914,7 +1914,7 @@
 
 // has_unique_object_representations
 
-#if _LIBCPP_STD_VER > 14 && defined(_LIBCPP_HAS_UNIQUE_OBJECT_REPRESENTATIONS)
+#if _LIBCPP_STD_VER > 14
 
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS has_unique_object_representations
     : public integral_constant<bool,

include/version

diff --git a/include/version b/include/version
index ce094f8..6fae891 100644
--- a/include/version
+++ b/include/version
@@ -222,9 +222,7 @@
 # endif
 # define __cpp_lib_gcd_lcm                              201606L
 // # define __cpp_lib_hardware_interference_size           201703L
-# if defined(_LIBCPP_HAS_UNIQUE_OBJECT_REPRESENTATIONS)
-#   define __cpp_lib_has_unique_object_representations  201606L
-# endif
+# define __cpp_lib_has_unique_object_representations    201606L
 # define __cpp_lib_hypot                                201603L
 # define __cpp_lib_incomplete_container_elements        201505L
 # define __cpp_lib_invoke                               201411L