[libcxx-commits] [libcxx] r363072 - [libcxx] Slightly improved policy for handling experimental features
Louis Dionne via libcxx-commits
libcxx-commits at lists.llvm.org
Tue Jun 11 07:48:40 PDT 2019
Author: ldionne
Date: Tue Jun 11 07:48:40 2019
New Revision: 363072
URL: http://llvm.org/viewvc/llvm-project?rev=363072&view=rev
Log:
[libcxx] Slightly improved policy for handling experimental features
Summary:
Following the discussion on the libcxx-dev mailing list
(http://lists.llvm.org/pipermail/libcxx-dev/2019-May/000358.html),
this implements the new policy for handling experimental features and
their deprecation. We basically add a deprecation warning for
std::experimental::filesystem, and we remove a bunch of <experimental/*>
headers that were now empty.
Reviewers: mclow.lists, EricWF
Subscribers: mgorny, christof, jkorous, dexonsmith, arphaman, libcxx-commits, jfb
Tags: #libc
Differential Revision: https://reviews.llvm.org/D62428
Added:
libcxx/trunk/docs/DesignDocs/ExperimentalFeatures.rst
libcxx/trunk/test/libcxx/experimental/filesystem/deprecated.fail.cpp
libcxx/trunk/test/std/experimental/filesystem/lit.local.cfg
Removed:
libcxx/trunk/include/experimental/any
libcxx/trunk/include/experimental/chrono
libcxx/trunk/include/experimental/numeric
libcxx/trunk/include/experimental/optional
libcxx/trunk/include/experimental/ratio
libcxx/trunk/include/experimental/string_view
libcxx/trunk/include/experimental/system_error
libcxx/trunk/include/experimental/tuple
libcxx/trunk/test/libcxx/experimental/diagnostics/
libcxx/trunk/test/libcxx/experimental/numerics/
libcxx/trunk/test/libcxx/experimental/strings/
libcxx/trunk/test/libcxx/experimental/utilities/
libcxx/trunk/www/TS_deprecation.html
Modified:
libcxx/trunk/docs/UsingLibcxx.rst
libcxx/trunk/docs/index.rst
libcxx/trunk/include/CMakeLists.txt
libcxx/trunk/include/experimental/__config
libcxx/trunk/test/libcxx/experimental/filesystem/version.pass.cpp
libcxx/trunk/www/index.html
Added: libcxx/trunk/docs/DesignDocs/ExperimentalFeatures.rst
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/docs/DesignDocs/ExperimentalFeatures.rst?rev=363072&view=auto
==============================================================================
--- libcxx/trunk/docs/DesignDocs/ExperimentalFeatures.rst (added)
+++ libcxx/trunk/docs/DesignDocs/ExperimentalFeatures.rst Tue Jun 11 07:48:40 2019
@@ -0,0 +1,203 @@
+=====================
+Experimental Features
+=====================
+
+.. contents::
+ :local:
+
+.. _experimental features:
+
+Overview
+========
+
+Libc++ implements technical specifications (TSes) and ships them as experimental
+features that users are free to try out. The goal is to allow getting feedback
+on those experimental features.
+
+However, libc++ does not provide the same guarantees about those features as
+it does for the rest of the library. In particular, no ABI or API stability
+is guaranteed, and experimental features are deprecated once the non-experimental
+equivalent has shipped in the library. This document outlines the details of
+that process.
+
+Background
+==========
+
+The "end game" of a Technical Specification (TS) is to have the features in
+there added to a future version of the C++ Standard. When this happens, the TS
+can be retired. Sometimes, only part of at TS is added to the standard, and
+the rest of the features may be incorporated into the next version of the TS.
+
+Adoption leaves library implementors with two implementations of a feature,
+one in namespace ``std``, and the other in namespace ``std::experimental``.
+The first one will continue to evolve (via issues and papers), while the other
+will not. Gradually they will diverge. It's not good for users to have two
+(subtly) different implementations of the same functionality in the same library.
+
+Design
+======
+
+When a feature is adopted into the main standard, we implement it in namespace
+``std``. Once that implementation is complete, we then create a deprecation
+warning for the corresponding experimental feature warning users to move off
+of it and to the now-standardized feature.
+
+These deprecation warnings are guarded by a macro of the form
+``_LIBCPP_NO_EXPERIMENTAL_DEPRECATION_WARNING_<FEATURE>``, which
+can be defined by users to disable the deprecation warning. Whenever
+possible, deprecation warnings are put on a per-declaration basis
+using the ``[[deprecated]]`` attribute, which also allows disabling
+the warnings using ``-Wno-deprecated-declarations``.
+
+After **2 releases** of LLVM, the experimental feature is removed completely
+(and the deprecation notice too). Using the experimental feature simply becomes
+an error. Furthermore, when an experimental header becomes empty due to the
+removal of the corresponding experimental feature, the header is removed.
+Keeping the header around creates incorrect assumptions from users and breaks
+``__has_include``.
+
+
+Status of TSes
+==============
+
+Library Fundamentals TS `V1 <https://wg21.link/N4480>`__ and `V2 <https://wg21.link/N4617>`__
+---------------------------------------------------------------------------------------------
+
+Most (but not all) of the features of the LFTS were accepted into C++17.
+
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| Section | Feature | Shipped in ``std`` | To be removed from ``std::experimental`` | Notes |
++=========+=======================================================+====================+==========================================+=========================+
+| 2.1 | ``uses_allocator construction`` | 5.0 | 7.0 | |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 3.1.2 | ``erased_type`` | | n/a | Not part of C++17 |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 3.2.1 | ``tuple_size_v`` | 5.0 | 7.0 | Removed |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 3.2.2 | ``apply`` | 5.0 | 7.0 | Removed |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 3.3.1 | All of the ``_v`` traits in ``<type_traits>`` | 5.0 | 7.0 | Removed |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 3.3.2 | ``invocation_type`` and ``raw_invocation_type`` | | n/a | Not part of C++17 |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 3.3.3 | Logical operator traits | 5.0 | 7.0 | Removed |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 3.3.3 | Detection Idiom | 5.0 | | Only partially in C++17 |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 3.4.1 | All of the ``_v`` traits in ``<ratio>`` | 5.0 | 7.0 | Removed |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 3.5.1 | All of the ``_v`` traits in ``<chrono>`` | 5.0 | 7.0 | Removed |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 3.6.1 | All of the ``_v`` traits in ``<system_error>`` | 5.0 | 7.0 | Removed |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 3.7 | ``propagate_const`` | | n/a | Not part of C++17 |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 4.2 | Enhancements to ``function`` | Not yet | | |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 4.3 | searchers | 7.0 | 9.0 | |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 5 | optional | 5.0 | 7.0 | Removed |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 6 | ``any`` | 5.0 | 7.0 | Removed |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 7 | ``string_view`` | 5.0 | 7.0 | Removed |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 8.2.1 | ``shared_ptr`` enhancements | Not yet | Never added | |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 8.2.2 | ``weak_ptr`` enhancements | Not yet | Never added | |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 8.5 | ``memory_resource`` | Not yet | | |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 8.6 | ``polymorphic_allocator`` | Not yet | | |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 8.7 | ``resource_adaptor`` | | n/a | Not part of C++17 |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 8.8 | Access to program-wide ``memory_resource`` objects | Not yet | | |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 8.9 | Pool resource classes | Not yet | | |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 8.10 | ``monotonic_buffer_resource`` | Not yet | | |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 8.11 | Alias templates using polymorphic memory resources | Not yet | | |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 8.12 | Non-owning pointers | | n/a | Not part of C++17 |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 11.2 | ``promise`` | | n/a | Not part of C++17 |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 11.3 | ``packaged_task`` | | n/a | Not part of C++17 |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 12.2 | ``search`` | 7.0 | 9.0 | |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 12.3 | ``sample`` | 5.0 | 7.0 | Removed |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 12.4 | ``shuffle`` | | | Not part of C++17 |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 13.1 | ``gcd`` and ``lcm`` | 5.0 | 7.0 | Removed |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 13.2 | Random number generation | | | Not part of C++17 |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+| 14 | Reflection Library | | | Not part of C++17 |
++---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+
+
+`FileSystem TS <https://wg21.link/N4100>`__
+-------------------------------------------
+The FileSystem TS was accepted (in totality) for C++17.
+The FileSystem TS implementation was shipped in namespace ``std`` in LLVM 7.0, and will be removed in LLVM 11.0 (due to the lack of deprecation warnings before LLVM 9.0).
+
+Parallelism TS `V1 <https://wg21.link/N4507>`__ and `V2 <https://wg21.link/N4706>`__
+------------------------------------------------------------------------------------
+Some (most) of the Parallelism TS was accepted for C++17.
+We have not yet shipped an implementation of the Parallelism TS.
+
+`Coroutines TS <https://wg21.link/N4680>`__
+-------------------------------------------
+The Coroutines TS is not yet part of a shipping standard.
+We are shipping (as of v5.0) an implementation of the Coroutines TS in namespace ``std::experimental``.
+
+`Networking TS <https://wg21.link/N4656>`__
+-------------------------------------------
+The Networking TS is not yet part of a shipping standard.
+We have not yet shipped an implementation of the Networking TS.
+
+`Ranges TS <https://wg21.link/N4685>`__
+---------------------------------------
+The Ranges TS is not yet part of a shipping standard.
+We have not yet shipped an implementation of the Ranges TS.
+
+`Concepts TS <https://wg21.link/N4641>`__
+-----------------------------------------
+The Concepts TS is not yet part of a shipping standard, but it has been adopted into the C++20 working draft.
+We have not yet shipped an implementation of the Concepts TS.
+
+`Concurrency TS <https://wg21.link/P0159>`__
+--------------------------------------------
+The Concurrency TS was adopted in Kona (2015).
+None of the Concurrency TS was accepted for C++17.
+We have not yet shipped an implementation of the Concurrency TS.
+
+.. +---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+.. | Section | Feature | Shipped in ``std`` | To be removed from ``std::experimental`` | Notes |
+.. +=========+=======================================================+====================+==========================================+=========================+
+.. | 2.3 | class template ``future`` | | | |
+.. +---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+.. | 2.4 | class template ``shared_future`` | | | |
+.. +---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+.. | 2.5 | class template ``promise`` | | | Only using ``future`` |
+.. +---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+.. | 2.6 | class template ``packaged_task`` | | | Only using ``future`` |
+.. +---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+.. | 2.7 | function template ``when_all`` | | | Not part of C++17 |
+.. +---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+.. | 2.8 | class template ``when_any_result`` | | | Not part of C++17 |
+.. +---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+.. | 2.9 | function template ``when_any`` | | | Not part of C++17 |
+.. +---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+.. | 2.10 | function template ``make_ready_future`` | | | Not part of C++17 |
+.. +---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+.. | 2.11 | function template ``make_exeptional_future`` | | | Not part of C++17 |
+.. +---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+.. | 3 | ``latches`` and ``barriers`` | | | Not part of C++17 |
+.. +---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
+.. | 4 | Atomic Smart Pointers | | | Adopted for C++20 |
+.. +---------+-------------------------------------------------------+--------------------+------------------------------------------+-------------------------+
Modified: libcxx/trunk/docs/UsingLibcxx.rst
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/docs/UsingLibcxx.rst?rev=363072&r1=363071&r2=363072&view=diff
==============================================================================
--- libcxx/trunk/docs/UsingLibcxx.rst (original)
+++ libcxx/trunk/docs/UsingLibcxx.rst Tue Jun 11 07:48:40 2019
@@ -84,6 +84,9 @@ page.
* The contents of the ``<experimental/...>`` headers and ``libc++experimental.a``
library will not remain compatible between versions.
* No guarantees of API or ABI stability are provided.
+ * When we implement the standardized version of an experimental feature,
+ the experimental feature is removed two releases after the non-experimental
+ version has shipped. The full policy is explained :ref:`here <experimental features>`.
Using libc++ on Linux
=====================
Modified: libcxx/trunk/docs/index.rst
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/docs/index.rst?rev=363072&r1=363071&r2=363072&view=diff
==============================================================================
--- libcxx/trunk/docs/index.rst (original)
+++ libcxx/trunk/docs/index.rst Tue Jun 11 07:48:40 2019
@@ -137,6 +137,7 @@ Design Documents
DesignDocs/DebugMode
DesignDocs/CapturingConfigInfo
DesignDocs/ABIVersioning
+ DesignDocs/ExperimentalFeatures
DesignDocs/VisibilityMacros
DesignDocs/ThreadingSupportAPI
DesignDocs/FileTimeType
Modified: libcxx/trunk/include/CMakeLists.txt
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/include/CMakeLists.txt?rev=363072&r1=363071&r2=363072&view=diff
==============================================================================
--- libcxx/trunk/include/CMakeLists.txt (original)
+++ libcxx/trunk/include/CMakeLists.txt Tue Jun 11 07:48:40 2019
@@ -65,8 +65,6 @@ set(files
experimental/__config
experimental/__memory
experimental/algorithm
- experimental/any
- experimental/chrono
experimental/coroutine
experimental/deque
experimental/filesystem
@@ -76,17 +74,11 @@ set(files
experimental/list
experimental/map
experimental/memory_resource
- experimental/numeric
- experimental/optional
experimental/propagate_const
- experimental/ratio
experimental/regex
experimental/set
experimental/simd
experimental/string
- experimental/string_view
- experimental/system_error
- experimental/tuple
experimental/type_traits
experimental/unordered_map
experimental/unordered_set
Modified: libcxx/trunk/include/experimental/__config
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/include/experimental/__config?rev=363072&r1=363071&r2=363072&view=diff
==============================================================================
--- libcxx/trunk/include/experimental/__config (original)
+++ libcxx/trunk/include/experimental/__config Tue Jun 11 07:48:40 2019
@@ -36,8 +36,14 @@
namespace chrono { namespace experimental { inline namespace fundamentals_v1 {
#define _LIBCPP_END_NAMESPACE_CHRONO_LFTS _LIBCPP_END_NAMESPACE_STD } } }
+#if defined(_LIBCPP_NO_EXPERIMENTAL_DEPRECATION_WARNING_FILESYSTEM)
+# define _LIBCPP_DEPRECATED_EXPERIMENTAL_FILESYSTEM /* nothing */
+#else
+# define _LIBCPP_DEPRECATED_EXPERIMENTAL_FILESYSTEM __attribute__((deprecated("std::experimental::filesystem has now been deprecated in favor of C++17's std::filesystem. Please stop using it and start using std::filesystem. This experimental version will be removed in LLVM 11. You can remove this warning by defining the _LIBCPP_NO_EXPERIMENTAL_DEPRECATION_WARNING_FILESYSTEM macro.")))
+#endif
+
#define _LIBCPP_BEGIN_NAMESPACE_EXPERIMENTAL_FILESYSTEM \
- _LIBCPP_BEGIN_NAMESPACE_EXPERIMENTAL namespace filesystem { \
+ _LIBCPP_BEGIN_NAMESPACE_EXPERIMENTAL namespace filesystem _LIBCPP_DEPRECATED_EXPERIMENTAL_FILESYSTEM { \
inline namespace v1 {
#define _LIBCPP_END_NAMESPACE_EXPERIMENTAL_FILESYSTEM \
Removed: libcxx/trunk/include/experimental/any
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/include/experimental/any?rev=363071&view=auto
==============================================================================
--- libcxx/trunk/include/experimental/any (original)
+++ libcxx/trunk/include/experimental/any (removed)
@@ -1,20 +0,0 @@
-// -*- C++ -*-
-//===------------------------------- any ----------------------------------===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-#ifndef _LIBCPP_EXPERIMENTAL_ANY
-#define _LIBCPP_EXPERIMENTAL_ANY
-
-#include <__config>
-
-#ifdef _LIBCPP_WARNING
-_LIBCPP_WARNING("<experimental/any> has been removed. Use <any> instead.")
-#else
-# warning "<experimental/any> has been removed. Use <any> instead."
-#endif
-
-#endif // _LIBCPP_EXPERIMENTAL_ANY
Removed: libcxx/trunk/include/experimental/chrono
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/include/experimental/chrono?rev=363071&view=auto
==============================================================================
--- libcxx/trunk/include/experimental/chrono (original)
+++ libcxx/trunk/include/experimental/chrono (removed)
@@ -1,20 +0,0 @@
-// -*- C++ -*-
-//===---------------------------- chrono ----------------------------------===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-#ifndef _LIBCPP_EXPERIMENTAL_CHRONO
-#define _LIBCPP_EXPERIMENTAL_CHRONO
-
-#include <__config>
-
-#ifdef _LIBCPP_WARNING
-_LIBCPP_WARNING("<experimental/chrono> has been removed. Use <chrono> instead.")
-#else
-# warning "<experimental/chrono> has been removed. Use <chrono> instead."
-#endif
-
-#endif // _LIBCPP_EXPERIMENTAL_CHRONO
Removed: libcxx/trunk/include/experimental/numeric
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/include/experimental/numeric?rev=363071&view=auto
==============================================================================
--- libcxx/trunk/include/experimental/numeric (original)
+++ libcxx/trunk/include/experimental/numeric (removed)
@@ -1,20 +0,0 @@
-// -*- C++ -*-
-//===--------------------------- numeric ----------------------------------===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-#ifndef _LIBCPP_EXPERIMENTAL_NUMERIC
-#define _LIBCPP_EXPERIMENTAL_NUMERIC
-
-#include <__config>
-
-#ifdef _LIBCPP_WARNING
-_LIBCPP_WARNING("<experimental/numeric> has been removed. Use <numeric> instead.")
-#else
-# warning "<experimental/numeric> has been removed. Use <numeric> instead."
-#endif
-
-#endif // _LIBCPP_EXPERIMENTAL_NUMERIC
Removed: libcxx/trunk/include/experimental/optional
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/include/experimental/optional?rev=363071&view=auto
==============================================================================
--- libcxx/trunk/include/experimental/optional (original)
+++ libcxx/trunk/include/experimental/optional (removed)
@@ -1,20 +0,0 @@
-// -*- C++ -*-
-//===-------------------------- optional ----------------------------------===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-#ifndef _LIBCPP_EXPERIMENTAL_OPTIONAL
-#define _LIBCPP_EXPERIMENTAL_OPTIONAL
-
-#include <__config>
-
-#ifdef _LIBCPP_WARNING
-_LIBCPP_WARNING("<experimental/optional> has been removed. Use <optional> instead.")
-#else
-# warning "<experimental/optional> has been removed. Use <optional> instead."
-#endif
-
-#endif // _LIBCPP_EXPERIMENTAL_OPTIONAL
Removed: libcxx/trunk/include/experimental/ratio
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/include/experimental/ratio?rev=363071&view=auto
==============================================================================
--- libcxx/trunk/include/experimental/ratio (original)
+++ libcxx/trunk/include/experimental/ratio (removed)
@@ -1,20 +0,0 @@
-// -*- C++ -*-
-//===----------------------------- ratio ----------------------------------===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-#ifndef _LIBCPP_EXPERIMENTAL_RATIO
-#define _LIBCPP_EXPERIMENTAL_RATIO
-
-#include <__config>
-
-#ifdef _LIBCPP_WARNING
-_LIBCPP_WARNING("<experimental/ratio> has been removed. Use <ratio> instead.")
-#else
-# warning "<experimental/ratio> has been removed. Use <ratio> instead."
-#endif
-
-#endif // _LIBCPP_EXPERIMENTAL_RATIO
Removed: libcxx/trunk/include/experimental/string_view
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/include/experimental/string_view?rev=363071&view=auto
==============================================================================
--- libcxx/trunk/include/experimental/string_view (original)
+++ libcxx/trunk/include/experimental/string_view (removed)
@@ -1,20 +0,0 @@
-// -*- C++ -*-
-//===------------------------ string_view ---------------------------------===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-#ifndef _LIBCPP_EXPERIMENTAL_STRING_VIEW
-#define _LIBCPP_EXPERIMENTAL_STRING_VIEW
-
-#include <__config>
-
-#ifdef _LIBCPP_WARNING
-_LIBCPP_WARNING("<experimental/string_view> has been removed. Use <string_view> instead.")
-#else
-# warning "<experimental/string_view> has been removed. Use <string_view> instead."
-#endif
-
-#endif // _LIBCPP_EXPERIMENTAL_STRING_VIEW
Removed: libcxx/trunk/include/experimental/system_error
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/include/experimental/system_error?rev=363071&view=auto
==============================================================================
--- libcxx/trunk/include/experimental/system_error (original)
+++ libcxx/trunk/include/experimental/system_error (removed)
@@ -1,20 +0,0 @@
-// -*- C++ -*-
-//===-------------------------- system_error ------------------------------===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-#ifndef _LIBCPP_EXPERIMENTAL_SYSTEM_ERROR
-#define _LIBCPP_EXPERIMENTAL_SYSTEM_ERROR
-
-#include <__config>
-
-#ifdef _LIBCPP_WARNING
-_LIBCPP_WARNING("<experimental/system_error> has been removed. Use <system_error> instead.")
-#else
-# warning "<experimental/system_error> has been removed. Use <system_error> instead."
-#endif
-
-#endif // _LIBCPP_EXPERIMENTAL_SYSTEM_ERROR
Removed: libcxx/trunk/include/experimental/tuple
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/include/experimental/tuple?rev=363071&view=auto
==============================================================================
--- libcxx/trunk/include/experimental/tuple (original)
+++ libcxx/trunk/include/experimental/tuple (removed)
@@ -1,20 +0,0 @@
-// -*- C++ -*-
-//===----------------------------- tuple ----------------------------------===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-#ifndef _LIBCPP_EXPERIMENTAL_TUPLE
-#define _LIBCPP_EXPERIMENTAL_TUPLE
-
-#include <__config>
-
-#ifdef _LIBCPP_WARNING
-_LIBCPP_WARNING("<experimental/tuple> has been removed. Use <tuple> instead.")
-#else
-# warning "<experimental/tuple> has been removed. Use <tuple> instead."
-#endif
-
-#endif // _LIBCPP_EXPERIMENTAL_TUPLE
Added: libcxx/trunk/test/libcxx/experimental/filesystem/deprecated.fail.cpp
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/libcxx/experimental/filesystem/deprecated.fail.cpp?rev=363072&view=auto
==============================================================================
--- libcxx/trunk/test/libcxx/experimental/filesystem/deprecated.fail.cpp (added)
+++ libcxx/trunk/test/libcxx/experimental/filesystem/deprecated.fail.cpp Tue Jun 11 07:48:40 2019
@@ -0,0 +1,20 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// REQUIRES: verify-support
+// UNSUPPORTED: c++98, c++03
+
+// <experimental/filesystem>
+
+#include <experimental/filesystem>
+
+using namespace std::experimental::filesystem; // expected-error {{'filesystem' is deprecated: std::experimental::filesystem has now been deprecated in favor of C++17's std::filesystem. Please stop using it and start using std::filesystem. This experimental version will be removed in LLVM 11. You can remove this warning by defining the _LIBCPP_NO_EXPERIMENTAL_DEPRECATION_WARNING_FILESYSTEM macro.}}
+
+int main(int, char**) {
+ return 0;
+}
Modified: libcxx/trunk/test/libcxx/experimental/filesystem/version.pass.cpp
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/libcxx/experimental/filesystem/version.pass.cpp?rev=363072&r1=363071&r2=363072&view=diff
==============================================================================
--- libcxx/trunk/test/libcxx/experimental/filesystem/version.pass.cpp (original)
+++ libcxx/trunk/test/libcxx/experimental/filesystem/version.pass.cpp Tue Jun 11 07:48:40 2019
@@ -8,6 +8,8 @@
// <experimental/filesystem>
+#define _LIBCPP_NO_EXPERIMENTAL_DEPRECATION_WARNING_FILESYSTEM
+
#include <experimental/filesystem>
#include "test_macros.h"
Added: libcxx/trunk/test/std/experimental/filesystem/lit.local.cfg
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/std/experimental/filesystem/lit.local.cfg?rev=363072&view=auto
==============================================================================
--- libcxx/trunk/test/std/experimental/filesystem/lit.local.cfg (added)
+++ libcxx/trunk/test/std/experimental/filesystem/lit.local.cfg Tue Jun 11 07:48:40 2019
@@ -0,0 +1 @@
+config.test_format.cxx.compile_flags += ['-D_LIBCPP_NO_EXPERIMENTAL_DEPRECATION_WARNING_FILESYSTEM']
Removed: libcxx/trunk/www/TS_deprecation.html
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/www/TS_deprecation.html?rev=363071&view=auto
==============================================================================
--- libcxx/trunk/www/TS_deprecation.html (original)
+++ libcxx/trunk/www/TS_deprecation.html (removed)
@@ -1,137 +0,0 @@
-<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
- "http://www.w3.org/TR/html4/strict.dtd">
-<!-- Material used from: HTML 4.01 specs: http://www.w3.org/TR/html401/ -->
-<html>
-<head>
- <meta http-equiv="content-type" content="text/html; charset=utf-8">
- <title>libc++ Technical Specification Status</title>
- <link type="text/css" rel="stylesheet" href="menu.css">
- <link type="text/css" rel="stylesheet" href="content.css">
-</head>
-
-<body>
-<div id="menu">
- <div>
- <a href="https://llvm.org/">LLVM Home</a>
- </div>
-
- <div class="submenu">
- <label>libc++ Info</label>
- <a href="/index.html">About</a>
- </div>
-
- <div class="submenu">
- <label>Quick Links</label>
- <a href="https://lists.llvm.org/mailman/listinfo/cfe-dev">cfe-dev</a>
- <a href="https://lists.llvm.org/mailman/listinfo/cfe-commits">cfe-commits</a>
- <a href="https://bugs.llvm.org/">Bug Reports</a>
- <a href="https://github.com/llvm/llvm-project/tree/master/libcxx/">Browse Sources</a>
- </div>
-</div>
-
-<div id="content">
-<p>The "end game" of a Technical Specification (TS) is to have the features in there added to a future version of the C++ standard. When this happens, the TS can be retired. Sometimes, only part of at TS is added to the standard, and the rest of the features may be incorporated into the next version of the TS.</p>
-
-<p>Adoption leaves library implementors with two implementations of a feature, one in namespace <tt>std</tt>, and the other in namespace <tt>std::experimental</tt>. The first one will continue to evolve (via issues and papers), while the other will not. Gradually they will diverge. It's not good for users to have two (subtly) different implementations of the same functionality in the same library.</p>
-
-<p>As features are adopted into the main standard, we will implement them in namespace <tt>std</tt>, and then remove the versions in <tt>std::experimental</tt>. The removal will not happen immediately, because that would be unhelpful for users - giving them no chance to update their code.</p>
-
-<p>The rule of thumb that libc++ will follow is: <b>one year</b>. <br/>One year after we ship an implementation of a feature in <tt>std</tt>, we will remove it from <tt>std::experimental</tt>.</p>
-
-<p>A specific example: The first release of clang/libc++ that officially supported C++17 was 5.0. For the 7.0 release (one year after 5.0), we will remove the features that were adopted into C++17 from the TSes, <i>and</i> that were present in namespace <tt>std</tt> in the 5.0 release.</p>
-
-<h2>Library Fundamentals TS <a href="https://wg21.link/N4480">V1</a> and <a href="https://wg21.link/N4617">V2</a></h2>
-
-<p>Most (but not all) of the features of the LFTS were accepted into C++17.</p>
-
-<table id="LFTS" border="1">
-<tr><th>Section</th><th>Feature</th><th>shipped in<br/><tt>std</tt></th><th>To be removed from<br/><tt>std::experimental</tt></th><th>Notes</th></tr>
-<tr><td>2.1</td><td>uses_allocator construction</td><td><center>5.0</center></td><td><center>7.0</center></td><td></td></tr>
-<tr><td>3.1.2</td><td><tt>erased_type</tt></td><td></td><td><center>n/a</center></td><td><i>Not part of C++17</i></td></tr>
-<tr><td>3.2.1</td><td><tt>tuple_size_v</tt></td><td><center>5.0</center></td><td><center>7.0</center></td><td><i>Removed</i></td></tr>
-<tr><td>3.2.2</td><td><tt>apply</tt></td><td><center>5.0</center></td><td><center>7.0</center></td><td><i>Removed</i></td></tr>
-<tr><td>3.3.1</td><td>All of the '_v' traits in <type_traits></td><td><center>5.0</center></td><td><center>7.0</center></td><td><i>Removed</i></td></tr>
-<tr><td>3.3.2</td><td><tt>invocation_type</tt> and <tt>raw_invocation_type</tt></td><td></td><td><center>n/a</center></td><td><I>Not part of C++17</I></td></tr>
-<tr><td>3.3.3</td><td>Logical operator traits</td><td><center>5.0</center></td><td><center>7.0</center></td><td><i>Removed</i></td></tr>
-<tr><td>3.3.3</td><td>Detection Idiom</td><td><center>5.0</center></td><td></td><td><I>Only partially in C++17</I></td></tr>
-<tr><td>3.4.1</td><td>All of the '_v' traits in <ratio></td><td><center>5.0</center></td><td><center>7.0</center></td><td><i>Removed</i></td></tr>
-<tr><td>3.5.1</td><td>All of the '_v' traits in <chrono></td><td><center>5.0</center></td><td><center>7.0</center></td><td><i>Removed</i></td></tr>
-<tr><td>3.6.1</td><td>All of the '_v' traits in <system_error></td><td><center>5.0</center></td><td><center>7.0</center></td><td><i>Removed</i></td></tr>
-<tr><td>3.7</td><td><tt>propagate_const</tt></td><td></td><td><center>n/a</center></td><td><I>Not part of C++17</I></td></tr>
-<tr><td>4.2</td><td>Enhancements to <tt>function</tt></td><td><center>Not yet</center></td><td></td><td></td></tr>
-<tr><td>4.3</td><td>searchers</td><td><center>7.0</center></td><td><center>9.0</center></td><td></td></tr>
-<tr><td>5</td><td><tt>optional</tt></td><td><center>5.0</center></td><td><center>7.0</center></td><td><i>Removed</i></td></tr>
-<tr><td>6</td><td><tt>any</tt></td><td><center>5.0</center></td><td><center>7.0</center></td><td><i>Removed</i></td></tr>
-<tr><td>7</td><td><tt>string_view</tt></td><td><center>5.0</center></td><td><center>7.0</center></td><td><i>Removed</i></td></tr>
-<tr><td>8.2.1</td><td><tt>shared_ptr</tt> enhancements</td><td><center>Not yet</center></td><td><center>Never added</center></td><td></td></tr>
-<tr><td>8.2.2</td><td><tt>weak_ptr</tt> enhancements</td><td><center>Not yet</center></td><td><center>Never added</center></td><td></td></tr>
-<tr><td>8.5</td><td><tt>memory_resource</tt></td><td><center>Not yet</center></td><td></td><td></td></tr>
-<tr><td>8.6</td><td><tt>polymorphic_allocator</tt></td><td><center>Not yet</center></td><td></td><td></td></tr>
-<tr><td>8.7</td><td><tt>resource_adaptor</tt></tt></td><td><center></center></td><td><center>n/a</center></td><td><I>Not part of C++17</I></td></tr>
-<tr><td>8.8</td><td>Access to program-wide <tt>memory_resource</tt> objects</td><td><center>Not yet</center></td><td></td><td></td></tr>
-<tr><td>8.9</td><td>Pool resource classes</td><td><center>Not yet</center></td><td></td><td></td></tr>
-<tr><td>8.10</td><td><tt>monotonic_buffer_resource</tt></td><td><center>Not yet</center></td><td></td><td></td></tr>
-<tr><td>8.11</td><td>Alias templates using polymorphic memory resources</td><td><center>Not yet</center></td><td></td><td></td></tr>
-<tr><td>8.12</td><td>Non-owning pointers</td><td></td><td><center>n/a</center></td><td><I>Not part of C++17</I></td></tr>
-<tr><td>11.2</td><td><tt>promise</tt></td><td></td><td><center>n/a</center></td><td><I>Not part of C++17</I></td></tr>
-<tr><td>11.3</td><td><tt>packaged_task</tt></td><td></td><td><center>n/a</center></td><td><I>Not part of C++17</I></td></tr>
-<tr><td>12.2</td><td><tt>search</tt></td><td><center>7.0</center></td><td><center>9.0</center></td><td><I></I></td></tr>
-<tr><td>12.3</td><td><tt>sample</tt></td><td><center>5.0</center></td><td><center>7.0</center></td><td><i>Removed</i></td></tr>
-<tr><td>12.4</td><td><tt>shuffle</tt></td><td></td><td></td><td><I>Not part of C++17</I></td></tr>
-<tr><td>13.1</td><td><tt>gcd</tt> and <tt>lcm</tt></td><td><center>5.0</center></td><td><center>7.0</center></td><td><i>Removed</i></td></tr>
-<tr><td>13.2</td><td>Random number generation</td><td></td><td><td><I>Not part of C++17</I></td></tr>
-<tr><td>14</td><td>Reflection Library</td><td></td><td><td><I>Not part of C++17</I></td></tr>
-</table>
-
-<h2><a href="https://wg21.link/N4100">FileSystem TS</a></h2>
-<p>The FileSystem TS was accepted (in toto) for C++17.</p>
-<p>The FileSystem TS implementation is still (as of v6.0) in namespace <tt>std::experimental</tt>.</p>
-
-<h2>Parallelism TS <a href="https://wg21.link/N4507">V1</a> and <a href="https://wg21.link/N4706">V2</a></h2>
-<p>Some (most) of the Parallelism TS was accepted for C++17.</p>
-<p>We have not yet shipped an implementation of the Parallelism TS.</p>
-
-<h2><a href="https://wg21.link/N4680">Coroutines TS</a></h2>
-<p>The Coroutines TS is not yet part of a shipping standard.</p>
-<p>We are shipping (as of v5.0) an implementation of the Coroutines TS in namespace <tt>std::experimental</tt>.</p>
-
-<h2><a href="https://wg21.link/N4656">Networking TS</a></h2>
-<p>The Networking TS is not yet part of a shipping standard.</p>
-<p>We have not yet shipped an implementation of the Networking TS.</p>
-
-<h2><a href="https://wg21.link/N4685">Ranges TS</a></h2>
-<p>The Ranges TS is not yet part of a shipping standard.</p>
-<p>We have not yet shipped an implementation of the Ranges TS.</p>
-
-<h2><a href="https://wg21.link/N4641">Concepts TS</a></h2>
-<p>The Concepts TS is not yet part of a shipping standard, but it has been adopted into the C++20 working draft.</p>
-<p>We have not yet shipped an implementation of the Concepts TS.</p>
-
-<h2><a href="https://wg21.link/P0159">Concurrency TS</a></h2>
-<!-- The Concurrency TS was adopted in Kona (2015). -->
-<p>None of the Concurrency TS was accepted for C++17.</p>
-<p>We have not yet shipped an implementation of the Concurrency TS.</p>
-
-<!--
-><table id="Concurrency" border="1">
-<tr><th>Section</th><th>Feature</th><th>shipped in <tt>std</tt></th><th>To be removed from <tt>std::experimental</tt></th><th>Notes</th></tr>
-<tr><td>2.3</td><td>class template <tt>future</tt></td><td></td><td><td></td></tr>
-<tr><td>2.4</td><td>class template <tt>shared_future</tt></td><td></td><td><td></td></tr>
-<tr><td>2.5</td><td>class template <tt>promise</tt></td><td></td><td><td><center><I>Only using <tt>future</tt></I></center></td></tr>
-<tr><td>2.6</td><td>class template <tt>packaged_task</tt></td><td></td><td><td><center><I>Only using <tt>future</tt></I></center></td></tr>
-<tr><td>2.7</td><td>function template <tt>when_all</tt></td><td></td><td><td><center><I>Not part of C++17</I></center></td></tr>
-<tr><td>2.8</td><td>class template <tt>when_any_result</tt></td><td></td><td><td><center><I>Not part of C++17</I></center></td></tr>
-<tr><td>2.9</td><td>function template <tt>when_any</tt></td><td></td><td><td><center><I>Not part of C++17</I></center></td></tr>
-<tr><td>2.10</td><td>function template <tt>make_ready_future</tt></td><td></td><td><td><center><I>Not part of C++17</I></center></td></tr>
-<tr><td>2.11</td><td>function template <tt>make_exeptional_future</tt></td><td></td><td><td><center><I>Not part of C++17</I></center></td></tr>
-<tr><td>3</td><td><tt>latches</tt> and <tt>barriers</tt></td><td></td><td><td><center><I>Not part of C++17</I></center></td></tr>
-<tr><td>4</td><td>Atomic Smart Pointers</td><td></td><td><td><center><I>Adopted for C++20</I></center></td></tr>
--->
-</table>
-
-
- <hr/>
- <p>Last Updated: 8-Feb-2018</p>
-</div>
-</body>
-</html>
Modified: libcxx/trunk/www/index.html
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/www/index.html?rev=363072&r1=363071&r2=363072&view=diff
==============================================================================
--- libcxx/trunk/www/index.html (original)
+++ libcxx/trunk/www/index.html Tue Jun 11 07:48:40 2019
@@ -145,7 +145,7 @@
and the current status of these features can be found <a href="ts1z_status.html">here</a>.</p>
<p>As features get moved from the Technical Specifications into the main standard, we
will (after a period for migration) remove them from the TS implementation. This
- process is detailed <a href="TS_deprecation.html">here</a>.</p>
+ process is detailed <a href="DesignDocs/ExperimentalFeatures.html">here</a>.</p>
<!--======================================================================-->
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