[libc++] Removes deprecated _LIBCPP_ENABLE_<VERSION>_REMOVED_FEATURES macros

[mordante]

We marked those macros as deprecated in the last release with the intent of
removing them in LLVM 19. This commit performs the removal.

[llvmbot]

@llvm/pr-subscribers-libcxx

Author: Mark de Wever (mordante)

Changes

---

Full diff: https://github.com/llvm/llvm-project/pull/88548.diff

6 Files Affected:

• (modified) libcxx/docs/ReleaseNotes/19.rst (+1-1)
• (modified) libcxx/docs/UsingLibcxx.rst (-12)
• (modified) libcxx/include/__config (-26)
• (removed) libcxx/test/libcxx/depr/enable_removed_cpp17_features.compile.pass.cpp (-36)
• (removed) libcxx/test/libcxx/depr/enable_removed_cpp17_features.deprecated.verify.cpp (-20)
• (removed) libcxx/test/libcxx/depr/enable_removed_cpp20_features.deprecated.verify.cpp (-20)

diff --git a/libcxx/docs/ReleaseNotes/19.rst b/libcxx/docs/ReleaseNotes/19.rst
index 7bc0148c9ff0aa..c8d331e76a0d56 100644
--- a/libcxx/docs/ReleaseNotes/19.rst
+++ b/libcxx/docs/ReleaseNotes/19.rst
@@ -89,7 +89,7 @@ Deprecations and Removals
 - The ``_LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS`` and ``_LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_VOID_SPECIALIZATION``
   macros have been removed in LLVM 19.
 
-- TODO: The ``_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES`` and ``_LIBCPP_ENABLE_CXX20_REMOVED_FEATURES`` macros have
+- The ``_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES`` and ``_LIBCPP_ENABLE_CXX20_REMOVED_FEATURES`` macros have
   been removed in LLVM 19. C++17 and C++20 removed features can still be re-enabled individually.
 
 - The ``_LIBCPP_INLINE_VISIBILITY`` and ``_VSTD`` macros have been removed in LLVM 19.
diff --git a/libcxx/docs/UsingLibcxx.rst b/libcxx/docs/UsingLibcxx.rst
index bc7817d14d04d0..821bd774555b8f 100644
--- a/libcxx/docs/UsingLibcxx.rst
+++ b/libcxx/docs/UsingLibcxx.rst
@@ -208,12 +208,6 @@ safety annotations.
 
 C++17 Specific Configuration Macros
 -----------------------------------
-**_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES**:
-  This macro is used to re-enable all the features removed in C++17. The effect
-  is equivalent to manually defining each macro listed below.
-  This macro is deprecated and will be removed in LLVM-19. Use the
-  individual macros listed below.
-
 **_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR**:
   This macro is used to re-enable `auto_ptr`.
 
@@ -238,12 +232,6 @@ C++20 Specific Configuration Macros
   This macro is used to re-enable the function
   ``std::shared_ptr<...>::unique()``.
 
-**_LIBCPP_ENABLE_CXX20_REMOVED_FEATURES**:
-  This macro is used to re-enable all the features removed in C++20. The effect
-  is equivalent to manually defining each macro listed below.
-  This macro is deprecated and will be removed in LLVM-19. Use the
-  individual macros listed below.
-
 **_LIBCPP_ENABLE_CXX20_REMOVED_BINDER_TYPEDEFS**:
   This macro is used to re-enable the `argument_type`, `result_type`,
   `first_argument_type`, and `second_argument_type` members of class
diff --git a/libcxx/include/__config b/libcxx/include/__config
index d98b54926bbe81..6c4ae59ec908ef 100644
--- a/libcxx/include/__config
+++ b/libcxx/include/__config
@@ -16,17 +16,6 @@
 #  pragma GCC system_header
 #endif
 
-#if defined(_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES) && !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS)
-#  pragma clang deprecated(                                                                                            \
-      _LIBCPP_ENABLE_CXX17_REMOVED_FEATURES,                                                                           \
-      "_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES is deprecated in LLVM 18 and will be removed in LLVM 19")
-#endif
-#if defined(_LIBCPP_ENABLE_CXX20_REMOVED_FEATURES) && !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS)
-#  pragma clang deprecated(                                                                                            \
-      _LIBCPP_ENABLE_CXX20_REMOVED_FEATURES,                                                                           \
-      "_LIBCPP_ENABLE_CXX20_REMOVED_FEATURES is deprecated in LLVM 18 and will be removed in LLVM 19")
-#endif
-
 #if defined(__apple_build_version__)
 // Given AppleClang XX.Y.Z, _LIBCPP_APPLE_CLANG_VER is XXYZ (e.g. AppleClang 14.0.3 => 1403)
 #  define _LIBCPP_COMPILER_CLANG_BASED
@@ -1247,21 +1236,6 @@ __sanitizer_verify_double_ended_contiguous_container(const void*, const void*, c
 #    define _LIBCPP_IF_WIDE_CHARACTERS(...) __VA_ARGS__
 #  endif
 
-#  if defined(_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES)
-#    define _LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR
-#    define _LIBCPP_ENABLE_CXX17_REMOVED_BINDERS
-#    define _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE
-#    define _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS
-#    define _LIBCPP_ENABLE_CXX17_REMOVED_UNARY_BINARY_FUNCTION
-#  endif // _LIBCPP_ENABLE_CXX17_REMOVED_FEATURES
-
-#  if defined(_LIBCPP_ENABLE_CXX20_REMOVED_FEATURES)
-#    define _LIBCPP_ENABLE_CXX20_REMOVED_BINDER_TYPEDEFS
-#    define _LIBCPP_ENABLE_CXX20_REMOVED_NEGATORS
-#    define _LIBCPP_ENABLE_CXX20_REMOVED_RAW_STORAGE_ITERATOR
-#    define _LIBCPP_ENABLE_CXX20_REMOVED_TYPE_TRAITS
-#  endif // _LIBCPP_ENABLE_CXX20_REMOVED_FEATURES
-
 // clang-format off
 #  define _LIBCPP_PUSH_MACROS _Pragma("push_macro(\"min\")") _Pragma("push_macro(\"max\")") _Pragma("push_macro(\"refresh\")") _Pragma("push_macro(\"move\")") _Pragma("push_macro(\"erase\")")
 #  define _LIBCPP_POP_MACROS _Pragma("pop_macro(\"min\")") _Pragma("pop_macro(\"max\")") _Pragma("pop_macro(\"refresh\")") _Pragma("pop_macro(\"move\")") _Pragma("pop_macro(\"erase\")")
diff --git a/libcxx/test/libcxx/depr/enable_removed_cpp17_features.compile.pass.cpp b/libcxx/test/libcxx/depr/enable_removed_cpp17_features.compile.pass.cpp
deleted file mode 100644
index 1b7acad3cfa464..00000000000000
--- a/libcxx/test/libcxx/depr/enable_removed_cpp17_features.compile.pass.cpp
+++ /dev/null
@@ -1,36 +0,0 @@
-//===----------------------------------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-// Test that defining _LIBCPP_ENABLE_CXX17_REMOVED_FEATURES correctly defines
-// _LIBCPP_ENABLE_CXX17_REMOVED_FOO for each individual component macro.
-
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES -Wno-deprecated-pragma
-
-#include <__config>
-
-#include "test_macros.h"
-
-#ifndef _LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR
-#  error _LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR must be defined
-#endif
-
-#ifndef _LIBCPP_ENABLE_CXX17_REMOVED_BINDERS
-#  error _LIBCPP_ENABLE_CXX17_REMOVED_BINDERS must be defined
-#endif
-
-#ifndef _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE
-#  error _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE must be defined
-#endif
-
-#ifndef _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS
-#error _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS must be defined
-#endif
-
-#ifndef _LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR
-#error _LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR must be defined
-#endif
diff --git a/libcxx/test/libcxx/depr/enable_removed_cpp17_features.deprecated.verify.cpp b/libcxx/test/libcxx/depr/enable_removed_cpp17_features.deprecated.verify.cpp
deleted file mode 100644
index 059c1b3ead4f15..00000000000000
--- a/libcxx/test/libcxx/depr/enable_removed_cpp17_features.deprecated.verify.cpp
+++ /dev/null
@@ -1,20 +0,0 @@
-//===----------------------------------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-// <__config>
-
-// Ensure that defining _LIBCPP_ENABLE_CXX17_REMOVED_FEATURES yields a
-// deprecation warning. We intend to issue a deprecation warning in LLVM 18
-// and remove the macro entirely in LLVM 19. As such, this test will be quite
-// short lived.
-
-// UNSUPPORTED: clang-modules-build
-
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES
-
-#include <__config> // expected-warning@* 1+ {{macro '_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES' has been marked as deprecated}}
diff --git a/libcxx/test/libcxx/depr/enable_removed_cpp20_features.deprecated.verify.cpp b/libcxx/test/libcxx/depr/enable_removed_cpp20_features.deprecated.verify.cpp
deleted file mode 100644
index 163ff7d8fbda03..00000000000000
--- a/libcxx/test/libcxx/depr/enable_removed_cpp20_features.deprecated.verify.cpp
+++ /dev/null
@@ -1,20 +0,0 @@
-//===----------------------------------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-// <__config>
-
-// Ensure that defining _LIBCPP_ENABLE_CXX20_REMOVED_FEATURES yields a
-// deprecation warning. We intend to issue a deprecation warning in LLVM 18
-// and remove the macro entirely in LLVM 19. As such, this test will be quite
-// short lived.
-
-// UNSUPPORTED: clang-modules-build
-
-// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_ENABLE_CXX20_REMOVED_FEATURES
-
-#include <version> // expected-warning@* 1+ {{macro '_LIBCPP_ENABLE_CXX20_REMOVED_FEATURES' has been marked as deprecated}}