[libcxx-commits] [libcxx] "[libc++] Try again LWG3233 Broken requirements for shared_ptr converting constructors" (PR #96103)
via libcxx-commits
libcxx-commits at lists.llvm.org
Wed Jun 19 12:11:01 PDT 2024
https://github.com/huixie90 created https://github.com/llvm/llvm-project/pull/96103
- Revert "[libc++] Revert LWG3223 Broken requirements for shared_ptr converting constructors (#93071)"
- Revert "[libc++] Revert temporary attempt to implement LWG 4110 (#95263)"
- test for default_delete
- Revert "Revert "[libc++] Revert temporary attempt to implement LWG 4110 (#95263)""
- test for NULL
>From 2b2be731d5c29699b2ec7e73b77927f97d8c7fc9 Mon Sep 17 00:00:00 2001
From: Hui <hui.xie0621 at gmail.com>
Date: Mon, 17 Jun 2024 19:39:21 +0100
Subject: [PATCH 1/5] Revert "[libc++] Revert LWG3223 Broken requirements for
shared_ptr converting constructors (#93071)"
This reverts commit e7d563501f056d0ae54440468df04b04c10f8070.
---
libcxx/docs/Status/Cxx20Issues.csv | 2 +-
libcxx/include/__memory/shared_ptr.h | 7 ++-
.../nullptr_t_deleter.pass.cpp | 20 ++++++++
.../nullptr_t_deleter_allocator.pass.cpp | 21 ++++++++
.../pointer_deleter.pass.cpp | 44 +++--------------
.../pointer_deleter_allocator.pass.cpp | 47 ++++--------------
.../util.smartptr.shared.const/types.h | 49 +++++++++++++++++++
7 files changed, 113 insertions(+), 77 deletions(-)
create mode 100644 libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/types.h
diff --git a/libcxx/docs/Status/Cxx20Issues.csv b/libcxx/docs/Status/Cxx20Issues.csv
index 6453f227cfcc2..e748ff6ad749b 100644
--- a/libcxx/docs/Status/Cxx20Issues.csv
+++ b/libcxx/docs/Status/Cxx20Issues.csv
@@ -200,7 +200,7 @@
"`3200 <https://wg21.link/LWG3200>`__","``midpoint``\ should not constrain ``T``\ is complete","Prague","|Nothing To Do|",""
"`3201 <https://wg21.link/LWG3201>`__","``lerp``\ should be marked as ``noexcept``\ ","Prague","|Complete|",""
"`3226 <https://wg21.link/LWG3226>`__","``zoned_time``\ constructor from ``string_view``\ should accept ``zoned_time<Duration2, TimeZonePtr2>``\ ","Prague","","","|chrono|"
-"`3233 <https://wg21.link/LWG3233>`__","Broken requirements for ``shared_ptr``\ converting constructors","Prague","",""
+"`3233 <https://wg21.link/LWG3233>`__","Broken requirements for ``shared_ptr``\ converting constructors","Prague","|Complete|","19.0"
"`3237 <https://wg21.link/LWG3237>`__","LWG 3038 and 3190 have inconsistent PRs","Prague","|Complete|","16.0"
"`3238 <https://wg21.link/LWG3238>`__","Insufficiently-defined behavior of ``std::function``\ deduction guides","Prague","|Nothing To Do|",""
"`3242 <https://wg21.link/LWG3242>`__","``std::format``\ : missing rules for ``arg-id``\ in ``width``\ and ``precision``\ ","Prague","|Complete|","14.0","|format|"
diff --git a/libcxx/include/__memory/shared_ptr.h b/libcxx/include/__memory/shared_ptr.h
index 358a851958db1..c4001a2bc927d 100644
--- a/libcxx/include/__memory/shared_ptr.h
+++ b/libcxx/include/__memory/shared_ptr.h
@@ -403,6 +403,9 @@ struct __shared_ptr_deleter_ctor_reqs {
__well_formed_deleter<_Dp, _Yp*>::value;
};
+template <class _Dp, class _Tp>
+using __shared_ptr_nullptr_deleter_ctor_reqs = _And<is_move_constructible<_Dp>, __well_formed_deleter<_Dp, nullptr_t> >;
+
#if defined(_LIBCPP_ABI_ENABLE_SHARED_PTR_TRIVIAL_ABI)
# define _LIBCPP_SHARED_PTR_TRIVIAL_ABI __attribute__((__trivial_abi__))
#else
@@ -502,7 +505,7 @@ class _LIBCPP_SHARED_PTR_TRIVIAL_ABI _LIBCPP_TEMPLATE_VIS shared_ptr {
#endif // _LIBCPP_HAS_NO_EXCEPTIONS
}
- template <class _Dp>
+ template <class _Dp, __enable_if_t<__shared_ptr_nullptr_deleter_ctor_reqs<_Dp, _Tp>::value, int> = 0 >
_LIBCPP_HIDE_FROM_ABI shared_ptr(nullptr_t __p, _Dp __d) : __ptr_(nullptr) {
#ifndef _LIBCPP_HAS_NO_EXCEPTIONS
try {
@@ -522,7 +525,7 @@ class _LIBCPP_SHARED_PTR_TRIVIAL_ABI _LIBCPP_TEMPLATE_VIS shared_ptr {
#endif // _LIBCPP_HAS_NO_EXCEPTIONS
}
- template <class _Dp, class _Alloc>
+ template <class _Dp, class _Alloc, __enable_if_t<__shared_ptr_nullptr_deleter_ctor_reqs<_Dp, _Tp>::value, int> = 0 >
_LIBCPP_HIDE_FROM_ABI shared_ptr(nullptr_t __p, _Dp __d, _Alloc __a) : __ptr_(nullptr) {
#ifndef _LIBCPP_HAS_NO_EXCEPTIONS
try {
diff --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/nullptr_t_deleter.pass.cpp b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/nullptr_t_deleter.pass.cpp
index 49497b6956b9f..13340ed5294c0 100644
--- a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/nullptr_t_deleter.pass.cpp
+++ b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/nullptr_t_deleter.pass.cpp
@@ -17,6 +17,7 @@
#include "test_macros.h"
#include "deleter_types.h"
+#include "types.h"
struct A
{
static int count;
@@ -28,6 +29,25 @@ struct A
int A::count = 0;
+// LWG 3233. Broken requirements for shared_ptr converting constructors
+// https://cplusplus.github.io/LWG/issue3233
+static_assert( std::is_constructible<std::shared_ptr<int>, std::nullptr_t, test_deleter<int> >::value, "");
+static_assert(!std::is_constructible<std::shared_ptr<int>, std::nullptr_t, bad_deleter>::value, "");
+static_assert(!std::is_constructible<std::shared_ptr<int>, std::nullptr_t, no_nullptr_deleter>::value, "");
+static_assert(!std::is_constructible<std::shared_ptr<int>, std::nullptr_t, no_move_deleter>::value, "");
+
+#if TEST_STD_VER >= 17
+static_assert( std::is_constructible<std::shared_ptr<int[]>, std::nullptr_t, test_deleter<int> >::value, "");
+static_assert(!std::is_constructible<std::shared_ptr<int[]>, std::nullptr_t, bad_deleter>::value, "");
+static_assert(!std::is_constructible<std::shared_ptr<int[]>, std::nullptr_t, no_nullptr_deleter>::value, "");
+static_assert(!std::is_constructible<std::shared_ptr<int[]>, std::nullptr_t, no_move_deleter>::value, "");
+
+static_assert( std::is_constructible<std::shared_ptr<int[5]>, std::nullptr_t, test_deleter<int> >::value, "");
+static_assert(!std::is_constructible<std::shared_ptr<int[5]>, std::nullptr_t, bad_deleter>::value, "");
+static_assert(!std::is_constructible<std::shared_ptr<int[5]>, std::nullptr_t, no_nullptr_deleter>::value, "");
+static_assert(!std::is_constructible<std::shared_ptr<int[5]>, std::nullptr_t, no_move_deleter>::value, "");
+#endif
+
int main(int, char**)
{
{
diff --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/nullptr_t_deleter_allocator.pass.cpp b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/nullptr_t_deleter_allocator.pass.cpp
index 4e9fc227b99e8..53ca6fb5b234d 100644
--- a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/nullptr_t_deleter_allocator.pass.cpp
+++ b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/nullptr_t_deleter_allocator.pass.cpp
@@ -17,6 +17,8 @@
#include "test_allocator.h"
#include "min_allocator.h"
+#include "types.h"
+
struct A
{
static int count;
@@ -28,6 +30,25 @@ struct A
int A::count = 0;
+// LWG 3233. Broken requirements for shared_ptr converting constructors
+// https://cplusplus.github.io/LWG/issue3233
+static_assert( std::is_constructible<std::shared_ptr<int>, std::nullptr_t, test_deleter<int>, test_allocator<int> >::value, "");
+static_assert(!std::is_constructible<std::shared_ptr<int>, std::nullptr_t, bad_deleter, test_allocator<int> >::value, "");
+static_assert(!std::is_constructible<std::shared_ptr<int>, std::nullptr_t, no_nullptr_deleter, test_allocator<int> >::value, "");
+static_assert(!std::is_constructible<std::shared_ptr<int>, std::nullptr_t, no_move_deleter, test_allocator<int> >::value, "");
+
+#if TEST_STD_VER >= 17
+static_assert( std::is_constructible<std::shared_ptr<int[]>, std::nullptr_t, test_deleter<int>, test_allocator<int> >::value, "");
+static_assert(!std::is_constructible<std::shared_ptr<int[]>, std::nullptr_t, bad_deleter, test_allocator<int> >::value, "");
+static_assert(!std::is_constructible<std::shared_ptr<int[]>, std::nullptr_t, no_nullptr_deleter, test_allocator<int> >::value, "");
+static_assert(!std::is_constructible<std::shared_ptr<int[]>, std::nullptr_t, no_move_deleter, test_allocator<int> >::value, "");
+
+static_assert( std::is_constructible<std::shared_ptr<int[5]>, std::nullptr_t, test_deleter<int>, test_allocator<int> >::value, "");
+static_assert(!std::is_constructible<std::shared_ptr<int[5]>, std::nullptr_t, bad_deleter, test_allocator<int> >::value, "");
+static_assert(!std::is_constructible<std::shared_ptr<int[5]>, std::nullptr_t, no_nullptr_deleter, test_allocator<int> >::value, "");
+static_assert(!std::is_constructible<std::shared_ptr<int[5]>, std::nullptr_t, no_move_deleter, test_allocator<int> >::value, "");
+#endif
+
int main(int, char**)
{
test_allocator_statistics alloc_stats;
diff --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter.pass.cpp b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter.pass.cpp
index 0f4aa0f5c0689..562acf56d96fe 100644
--- a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter.pass.cpp
+++ b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter.pass.cpp
@@ -17,6 +17,8 @@
#include "test_macros.h"
#include "deleter_types.h"
+#include "types.h"
+
struct A
{
static int count;
@@ -28,38 +30,8 @@ struct A
int A::count = 0;
-struct bad_ty { };
-
-struct bad_deleter
-{
- void operator()(bad_ty) { }
-};
-
-struct no_move_deleter
-{
- no_move_deleter(no_move_deleter const&) = delete;
- no_move_deleter(no_move_deleter &&) = delete;
- void operator()(int*) { }
-};
-
-static_assert(!std::is_move_constructible<no_move_deleter>::value, "");
-
-struct Base { };
-struct Derived : Base { };
-
-template<class T>
-class MoveDeleter
-{
- MoveDeleter();
- MoveDeleter(MoveDeleter const&);
-public:
- MoveDeleter(MoveDeleter&&) {}
-
- explicit MoveDeleter(int) {}
-
- void operator()(T* ptr) { delete ptr; }
-};
-
+// LWG 3233. Broken requirements for shared_ptr converting constructors
+// https://cplusplus.github.io/LWG/issue3233
// https://llvm.org/PR60258
// Invalid constructor SFINAE for std::shared_ptr's array ctors
static_assert( std::is_constructible<std::shared_ptr<int>, int*, test_deleter<int> >::value, "");
@@ -68,12 +40,12 @@ static_assert( std::is_constructible<std::shared_ptr<Base>, Derived*, test_dele
static_assert(!std::is_constructible<std::shared_ptr<A>, int*, test_deleter<A> >::value, "");
#if TEST_STD_VER >= 17
-static_assert( std::is_constructible<std::shared_ptr<int[]>, int*, test_deleter<int>>::value, "");
+static_assert( std::is_constructible<std::shared_ptr<int[]>, int*, test_deleter<int> >::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[]>, int*, bad_deleter>::value, "");
-static_assert(!std::is_constructible<std::shared_ptr<int[]>, int(*)[], test_deleter<int>>::value, "");
-static_assert( std::is_constructible<std::shared_ptr<int[5]>, int*, test_deleter<int>>::value, "");
+static_assert(!std::is_constructible<std::shared_ptr<int[]>, int(*)[], test_deleter<int> >::value, "");
+static_assert( std::is_constructible<std::shared_ptr<int[5]>, int*, test_deleter<int> >::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[5]>, int*, bad_deleter>::value, "");
-static_assert(!std::is_constructible<std::shared_ptr<int[5]>, int(*)[5], test_deleter<int>>::value, "");
+static_assert(!std::is_constructible<std::shared_ptr<int[5]>, int(*)[5], test_deleter<int> >::value, "");
#endif
int f() { return 5; }
diff --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter_allocator.pass.cpp b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter_allocator.pass.cpp
index a110525b9b922..9dffbcdd59a73 100644
--- a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter_allocator.pass.cpp
+++ b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter_allocator.pass.cpp
@@ -17,6 +17,7 @@
#include "test_allocator.h"
#include "min_allocator.h"
+#include "types.h"
struct A
{
static int count;
@@ -28,38 +29,8 @@ struct A
int A::count = 0;
-struct bad_ty { };
-
-struct bad_deleter
-{
- void operator()(bad_ty) { }
-};
-
-struct no_move_deleter
-{
- no_move_deleter(no_move_deleter const&) = delete;
- no_move_deleter(no_move_deleter &&) = delete;
- void operator()(int*) { }
-};
-
-static_assert(!std::is_move_constructible<no_move_deleter>::value, "");
-
-struct Base { };
-struct Derived : Base { };
-
-template<class T>
-class MoveDeleter
-{
- MoveDeleter();
- MoveDeleter(MoveDeleter const&);
-public:
- MoveDeleter(MoveDeleter&&) {}
-
- explicit MoveDeleter(int) {}
-
- void operator()(T* ptr) { delete ptr; }
-};
-
+// LWG 3233. Broken requirements for shared_ptr converting constructors
+// https://cplusplus.github.io/LWG/issue3233
// https://llvm.org/PR60258
// Invalid constructor SFINAE for std::shared_ptr's array ctors
static_assert( std::is_constructible<std::shared_ptr<int>, int*, test_deleter<int>, test_allocator<int> >::value, "");
@@ -68,12 +39,12 @@ static_assert( std::is_constructible<std::shared_ptr<Base>, Derived*, test_dele
static_assert(!std::is_constructible<std::shared_ptr<A>, int*, test_deleter<A>, test_allocator<A> >::value, "");
#if TEST_STD_VER >= 17
-static_assert( std::is_constructible<std::shared_ptr<int[]>, int*, test_deleter<int>, test_allocator<int>>::value, "");
-static_assert(!std::is_constructible<std::shared_ptr<int[]>, int*, bad_deleter, test_allocator<int>>::value, "");
-static_assert(!std::is_constructible<std::shared_ptr<int[]>, int(*)[], test_deleter<int>, test_allocator<int>>::value, "");
-static_assert( std::is_constructible<std::shared_ptr<int[5]>, int*, test_deleter<int>, test_allocator<int>>::value, "");
-static_assert(!std::is_constructible<std::shared_ptr<int[5]>, int*, bad_deleter, test_allocator<int>>::value, "");
-static_assert(!std::is_constructible<std::shared_ptr<int[5]>, int(*)[5], test_deleter<int>, test_allocator<int>>::value, "");
+static_assert( std::is_constructible<std::shared_ptr<int[]>, int*, test_deleter<int>, test_allocator<int> >::value, "");
+static_assert(!std::is_constructible<std::shared_ptr<int[]>, int*, bad_deleter, test_allocator<int> >::value, "");
+static_assert(!std::is_constructible<std::shared_ptr<int[]>, int(*)[], test_deleter<int>, test_allocator<int> >::value, "");
+static_assert( std::is_constructible<std::shared_ptr<int[5]>, int*, test_deleter<int>, test_allocator<int> >::value, "");
+static_assert(!std::is_constructible<std::shared_ptr<int[5]>, int*, bad_deleter, test_allocator<int> >::value, "");
+static_assert(!std::is_constructible<std::shared_ptr<int[5]>, int(*)[5], test_deleter<int>, test_allocator<int> >::value, "");
#endif
diff --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/types.h b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/types.h
new file mode 100644
index 0000000000000..5bfb3d70febea
--- /dev/null
+++ b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/types.h
@@ -0,0 +1,49 @@
+//===----------------------------------------------------------------------===//
+//
+// 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 TEST_STD_UTILITIES_MEMORY_UTIL_SMARTPTR_SHARED_CONST_TYPES_H
+#define TEST_STD_UTILITIES_MEMORY_UTIL_SMARTPTR_SHARED_CONST_TYPES_H
+
+#include <type_traits>
+
+struct bad_ty {};
+
+struct bad_deleter {
+ void operator()(bad_ty) {}
+};
+
+struct no_move_deleter {
+ no_move_deleter(no_move_deleter const&) = delete;
+ no_move_deleter(no_move_deleter&&) = delete;
+ void operator()(int*) {}
+};
+
+static_assert(!std::is_move_constructible<no_move_deleter>::value, "");
+
+struct no_nullptr_deleter {
+ void operator()(int*) const {}
+ void operator()(std::nullptr_t) const = delete;
+};
+
+struct Base {};
+struct Derived : Base {};
+
+template <class T>
+class MoveDeleter {
+ MoveDeleter();
+ MoveDeleter(MoveDeleter const&);
+
+public:
+ MoveDeleter(MoveDeleter&&) {}
+
+ explicit MoveDeleter(int) {}
+
+ void operator()(T* ptr) { delete ptr; }
+};
+
+#endif // TEST_STD_UTILITIES_MEMORY_UTIL_SMARTPTR_SHARED_CONST_TYPES_H
>From 8bdab5c359647570520d4bdbdafff222d73d9997 Mon Sep 17 00:00:00 2001
From: Hui <hui.xie0621 at gmail.com>
Date: Mon, 17 Jun 2024 19:54:10 +0100
Subject: [PATCH 2/5] Revert "[libc++] Revert temporary attempt to implement
LWG 4110 (#95263)"
This reverts commit a66e2a1988cb14ec2feadfbc3dd1ff4bd77f4be9.
---
libcxx/docs/Status/Cxx2cIssues.csv | 1 +
libcxx/include/__memory/shared_ptr.h | 2 +-
.../nullptr_t_deleter.pass.cpp | 7 +++----
.../nullptr_t_deleter_allocator.pass.cpp | 12 ++++++++----
.../pointer_deleter.pass.cpp | 8 ++++++++
.../pointer_deleter_allocator.pass.cpp | 8 ++++++++
6 files changed, 29 insertions(+), 9 deletions(-)
diff --git a/libcxx/docs/Status/Cxx2cIssues.csv b/libcxx/docs/Status/Cxx2cIssues.csv
index 8d24457186310..28359b7bb49ac 100644
--- a/libcxx/docs/Status/Cxx2cIssues.csv
+++ b/libcxx/docs/Status/Cxx2cIssues.csv
@@ -65,4 +65,5 @@
"`3343 <https://wg21.link/LWG3343>`__","Ordering of calls to ``unlock()`` and ``notify_all()`` in Effects element of ``notify_all_at_thread_exit()`` should be reversed","Not Yet Adopted","|Complete|","16.0",""
"XXXX","","The sys_info range should be affected by save","Not Yet Adopted","|Complete|","19.0"
"`4071 <https://wg21.link/LWG4071>`__","","``reference_wrapper`` comparisons are not SFINAE-friendly","Not Yet Adopted","|Complete|","19.0"
+"`4110 <https://wg21.link/LWG4110>`__","","``shared_ptr(nullptr_t, Deleter)`` is overconstrained, breaking some sensible deleters","Not Yet Adopted","|Complete|","19.0"
"","","","","",""
diff --git a/libcxx/include/__memory/shared_ptr.h b/libcxx/include/__memory/shared_ptr.h
index c4001a2bc927d..1b4c0e139d3c2 100644
--- a/libcxx/include/__memory/shared_ptr.h
+++ b/libcxx/include/__memory/shared_ptr.h
@@ -404,7 +404,7 @@ struct __shared_ptr_deleter_ctor_reqs {
};
template <class _Dp, class _Tp>
-using __shared_ptr_nullptr_deleter_ctor_reqs = _And<is_move_constructible<_Dp>, __well_formed_deleter<_Dp, nullptr_t> >;
+using __shared_ptr_nullptr_deleter_ctor_reqs = _And<is_move_constructible<_Dp>, __well_formed_deleter<_Dp, _Tp*> >;
#if defined(_LIBCPP_ABI_ENABLE_SHARED_PTR_TRIVIAL_ABI)
# define _LIBCPP_SHARED_PTR_TRIVIAL_ABI __attribute__((__trivial_abi__))
diff --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/nullptr_t_deleter.pass.cpp b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/nullptr_t_deleter.pass.cpp
index 13340ed5294c0..4ea752b36bd01 100644
--- a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/nullptr_t_deleter.pass.cpp
+++ b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/nullptr_t_deleter.pass.cpp
@@ -32,17 +32,16 @@ int A::count = 0;
// LWG 3233. Broken requirements for shared_ptr converting constructors
// https://cplusplus.github.io/LWG/issue3233
static_assert( std::is_constructible<std::shared_ptr<int>, std::nullptr_t, test_deleter<int> >::value, "");
-static_assert(!std::is_constructible<std::shared_ptr<int>, std::nullptr_t, bad_deleter>::value, "");
-static_assert(!std::is_constructible<std::shared_ptr<int>, std::nullptr_t, no_nullptr_deleter>::value, "");
+static_assert(!std::is_constructible<std::shared_ptr<int>, std::nullptr_t, bad_deleter>::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int>, std::nullptr_t, no_move_deleter>::value, "");
#if TEST_STD_VER >= 17
-static_assert( std::is_constructible<std::shared_ptr<int[]>, std::nullptr_t, test_deleter<int> >::value, "");
+static_assert(std::is_constructible<std::shared_ptr<int[]>, std::nullptr_t, test_deleter<int[]> >::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[]>, std::nullptr_t, bad_deleter>::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[]>, std::nullptr_t, no_nullptr_deleter>::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[]>, std::nullptr_t, no_move_deleter>::value, "");
-static_assert( std::is_constructible<std::shared_ptr<int[5]>, std::nullptr_t, test_deleter<int> >::value, "");
+static_assert(std::is_constructible<std::shared_ptr<int[5]>, std::nullptr_t, test_deleter<int[5]> >::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[5]>, std::nullptr_t, bad_deleter>::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[5]>, std::nullptr_t, no_nullptr_deleter>::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[5]>, std::nullptr_t, no_move_deleter>::value, "");
diff --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/nullptr_t_deleter_allocator.pass.cpp b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/nullptr_t_deleter_allocator.pass.cpp
index 53ca6fb5b234d..a479b24c4595a 100644
--- a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/nullptr_t_deleter_allocator.pass.cpp
+++ b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/nullptr_t_deleter_allocator.pass.cpp
@@ -33,17 +33,21 @@ int A::count = 0;
// LWG 3233. Broken requirements for shared_ptr converting constructors
// https://cplusplus.github.io/LWG/issue3233
static_assert( std::is_constructible<std::shared_ptr<int>, std::nullptr_t, test_deleter<int>, test_allocator<int> >::value, "");
-static_assert(!std::is_constructible<std::shared_ptr<int>, std::nullptr_t, bad_deleter, test_allocator<int> >::value, "");
-static_assert(!std::is_constructible<std::shared_ptr<int>, std::nullptr_t, no_nullptr_deleter, test_allocator<int> >::value, "");
+static_assert(!std::is_constructible<std::shared_ptr<int>, std::nullptr_t, bad_deleter, test_allocator<int> >::value,
+ "");
static_assert(!std::is_constructible<std::shared_ptr<int>, std::nullptr_t, no_move_deleter, test_allocator<int> >::value, "");
#if TEST_STD_VER >= 17
-static_assert( std::is_constructible<std::shared_ptr<int[]>, std::nullptr_t, test_deleter<int>, test_allocator<int> >::value, "");
+static_assert(
+ std::is_constructible<std::shared_ptr<int[]>, std::nullptr_t, test_deleter<int[]>, test_allocator<int> >::value,
+ "");
static_assert(!std::is_constructible<std::shared_ptr<int[]>, std::nullptr_t, bad_deleter, test_allocator<int> >::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[]>, std::nullptr_t, no_nullptr_deleter, test_allocator<int> >::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[]>, std::nullptr_t, no_move_deleter, test_allocator<int> >::value, "");
-static_assert( std::is_constructible<std::shared_ptr<int[5]>, std::nullptr_t, test_deleter<int>, test_allocator<int> >::value, "");
+static_assert(
+ std::is_constructible<std::shared_ptr<int[5]>, std::nullptr_t, test_deleter<int[5]>, test_allocator<int> >::value,
+ "");
static_assert(!std::is_constructible<std::shared_ptr<int[5]>, std::nullptr_t, bad_deleter, test_allocator<int> >::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[5]>, std::nullptr_t, no_nullptr_deleter, test_allocator<int> >::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[5]>, std::nullptr_t, no_move_deleter, test_allocator<int> >::value, "");
diff --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter.pass.cpp b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter.pass.cpp
index 562acf56d96fe..95dcb92b51993 100644
--- a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter.pass.cpp
+++ b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter.pass.cpp
@@ -115,6 +115,14 @@ int main(int, char**)
}
#endif // TEST_STD_VER >= 11
+#if TEST_STD_VER >= 14
+ {
+ // LWG 4110
+ auto deleter = [](auto pointer) { delete pointer; };
+ std::shared_ptr<int> p(new int, deleter);
+ }
+#endif
+
test_function_type();
return 0;
}
diff --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter_allocator.pass.cpp b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter_allocator.pass.cpp
index 9dffbcdd59a73..89e7d0b02d421 100644
--- a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter_allocator.pass.cpp
+++ b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter_allocator.pass.cpp
@@ -165,5 +165,13 @@ int main(int, char**)
test_allocator<Derived[4]> >::value, "");
}
+#if TEST_STD_VER >= 14
+ {
+ // LWG 4110
+ auto deleter = [](auto pointer) { delete pointer; };
+ std::shared_ptr<int> p(new int, deleter, std::allocator<int>());
+ }
+#endif
+
return 0;
}
>From dac5e232541d7503c3f820b54cc753de3017f052 Mon Sep 17 00:00:00 2001
From: Hui <hui.xie0621 at gmail.com>
Date: Mon, 17 Jun 2024 20:50:09 +0100
Subject: [PATCH 3/5] test for default_delete
---
.../pointer_deleter.pass.cpp | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter.pass.cpp b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter.pass.cpp
index 95dcb92b51993..e2ee719abe6ab 100644
--- a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter.pass.cpp
+++ b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter.pass.cpp
@@ -123,6 +123,13 @@ int main(int, char**)
}
#endif
- test_function_type();
- return 0;
+#if TEST_STD_VER >= 17
+ {
+ // See https://github.com/llvm/llvm-project/pull/93071#issuecomment-2166047398
+ std::shared_ptr<char[]> a(new char[10], std::default_delete<char[]>());
+ }
+#endif
+
+ test_function_type();
+ return 0;
}
>From e7a5989adefa312d636c42b17f58b39a96af5879 Mon Sep 17 00:00:00 2001
From: Hui <hui.xie0621 at gmail.com>
Date: Wed, 19 Jun 2024 09:21:36 +0100
Subject: [PATCH 4/5] Revert "Revert "[libc++] Revert temporary attempt to
implement LWG 4110 (#95263)""
This reverts commit 8bdab5c359647570520d4bdbdafff222d73d9997.
---
libcxx/docs/Status/Cxx2cIssues.csv | 1 -
libcxx/include/__memory/shared_ptr.h | 2 +-
.../nullptr_t_deleter.pass.cpp | 7 ++++---
.../nullptr_t_deleter_allocator.pass.cpp | 12 ++++--------
.../pointer_deleter.pass.cpp | 4 ++--
.../pointer_deleter_allocator.pass.cpp | 8 --------
6 files changed, 11 insertions(+), 23 deletions(-)
diff --git a/libcxx/docs/Status/Cxx2cIssues.csv b/libcxx/docs/Status/Cxx2cIssues.csv
index 28359b7bb49ac..8d24457186310 100644
--- a/libcxx/docs/Status/Cxx2cIssues.csv
+++ b/libcxx/docs/Status/Cxx2cIssues.csv
@@ -65,5 +65,4 @@
"`3343 <https://wg21.link/LWG3343>`__","Ordering of calls to ``unlock()`` and ``notify_all()`` in Effects element of ``notify_all_at_thread_exit()`` should be reversed","Not Yet Adopted","|Complete|","16.0",""
"XXXX","","The sys_info range should be affected by save","Not Yet Adopted","|Complete|","19.0"
"`4071 <https://wg21.link/LWG4071>`__","","``reference_wrapper`` comparisons are not SFINAE-friendly","Not Yet Adopted","|Complete|","19.0"
-"`4110 <https://wg21.link/LWG4110>`__","","``shared_ptr(nullptr_t, Deleter)`` is overconstrained, breaking some sensible deleters","Not Yet Adopted","|Complete|","19.0"
"","","","","",""
diff --git a/libcxx/include/__memory/shared_ptr.h b/libcxx/include/__memory/shared_ptr.h
index 1b4c0e139d3c2..c4001a2bc927d 100644
--- a/libcxx/include/__memory/shared_ptr.h
+++ b/libcxx/include/__memory/shared_ptr.h
@@ -404,7 +404,7 @@ struct __shared_ptr_deleter_ctor_reqs {
};
template <class _Dp, class _Tp>
-using __shared_ptr_nullptr_deleter_ctor_reqs = _And<is_move_constructible<_Dp>, __well_formed_deleter<_Dp, _Tp*> >;
+using __shared_ptr_nullptr_deleter_ctor_reqs = _And<is_move_constructible<_Dp>, __well_formed_deleter<_Dp, nullptr_t> >;
#if defined(_LIBCPP_ABI_ENABLE_SHARED_PTR_TRIVIAL_ABI)
# define _LIBCPP_SHARED_PTR_TRIVIAL_ABI __attribute__((__trivial_abi__))
diff --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/nullptr_t_deleter.pass.cpp b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/nullptr_t_deleter.pass.cpp
index 4ea752b36bd01..13340ed5294c0 100644
--- a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/nullptr_t_deleter.pass.cpp
+++ b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/nullptr_t_deleter.pass.cpp
@@ -32,16 +32,17 @@ int A::count = 0;
// LWG 3233. Broken requirements for shared_ptr converting constructors
// https://cplusplus.github.io/LWG/issue3233
static_assert( std::is_constructible<std::shared_ptr<int>, std::nullptr_t, test_deleter<int> >::value, "");
-static_assert(!std::is_constructible<std::shared_ptr<int>, std::nullptr_t, bad_deleter>::value, "");
+static_assert(!std::is_constructible<std::shared_ptr<int>, std::nullptr_t, bad_deleter>::value, "");
+static_assert(!std::is_constructible<std::shared_ptr<int>, std::nullptr_t, no_nullptr_deleter>::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int>, std::nullptr_t, no_move_deleter>::value, "");
#if TEST_STD_VER >= 17
-static_assert(std::is_constructible<std::shared_ptr<int[]>, std::nullptr_t, test_deleter<int[]> >::value, "");
+static_assert( std::is_constructible<std::shared_ptr<int[]>, std::nullptr_t, test_deleter<int> >::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[]>, std::nullptr_t, bad_deleter>::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[]>, std::nullptr_t, no_nullptr_deleter>::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[]>, std::nullptr_t, no_move_deleter>::value, "");
-static_assert(std::is_constructible<std::shared_ptr<int[5]>, std::nullptr_t, test_deleter<int[5]> >::value, "");
+static_assert( std::is_constructible<std::shared_ptr<int[5]>, std::nullptr_t, test_deleter<int> >::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[5]>, std::nullptr_t, bad_deleter>::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[5]>, std::nullptr_t, no_nullptr_deleter>::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[5]>, std::nullptr_t, no_move_deleter>::value, "");
diff --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/nullptr_t_deleter_allocator.pass.cpp b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/nullptr_t_deleter_allocator.pass.cpp
index a479b24c4595a..53ca6fb5b234d 100644
--- a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/nullptr_t_deleter_allocator.pass.cpp
+++ b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/nullptr_t_deleter_allocator.pass.cpp
@@ -33,21 +33,17 @@ int A::count = 0;
// LWG 3233. Broken requirements for shared_ptr converting constructors
// https://cplusplus.github.io/LWG/issue3233
static_assert( std::is_constructible<std::shared_ptr<int>, std::nullptr_t, test_deleter<int>, test_allocator<int> >::value, "");
-static_assert(!std::is_constructible<std::shared_ptr<int>, std::nullptr_t, bad_deleter, test_allocator<int> >::value,
- "");
+static_assert(!std::is_constructible<std::shared_ptr<int>, std::nullptr_t, bad_deleter, test_allocator<int> >::value, "");
+static_assert(!std::is_constructible<std::shared_ptr<int>, std::nullptr_t, no_nullptr_deleter, test_allocator<int> >::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int>, std::nullptr_t, no_move_deleter, test_allocator<int> >::value, "");
#if TEST_STD_VER >= 17
-static_assert(
- std::is_constructible<std::shared_ptr<int[]>, std::nullptr_t, test_deleter<int[]>, test_allocator<int> >::value,
- "");
+static_assert( std::is_constructible<std::shared_ptr<int[]>, std::nullptr_t, test_deleter<int>, test_allocator<int> >::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[]>, std::nullptr_t, bad_deleter, test_allocator<int> >::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[]>, std::nullptr_t, no_nullptr_deleter, test_allocator<int> >::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[]>, std::nullptr_t, no_move_deleter, test_allocator<int> >::value, "");
-static_assert(
- std::is_constructible<std::shared_ptr<int[5]>, std::nullptr_t, test_deleter<int[5]>, test_allocator<int> >::value,
- "");
+static_assert( std::is_constructible<std::shared_ptr<int[5]>, std::nullptr_t, test_deleter<int>, test_allocator<int> >::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[5]>, std::nullptr_t, bad_deleter, test_allocator<int> >::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[5]>, std::nullptr_t, no_nullptr_deleter, test_allocator<int> >::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[5]>, std::nullptr_t, no_move_deleter, test_allocator<int> >::value, "");
diff --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter.pass.cpp b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter.pass.cpp
index e2ee719abe6ab..7c2ee78605c97 100644
--- a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter.pass.cpp
+++ b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter.pass.cpp
@@ -130,6 +130,6 @@ int main(int, char**)
}
#endif
- test_function_type();
- return 0;
+ test_function_type();
+ return 0;
}
diff --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter_allocator.pass.cpp b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter_allocator.pass.cpp
index 89e7d0b02d421..9dffbcdd59a73 100644
--- a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter_allocator.pass.cpp
+++ b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter_allocator.pass.cpp
@@ -165,13 +165,5 @@ int main(int, char**)
test_allocator<Derived[4]> >::value, "");
}
-#if TEST_STD_VER >= 14
- {
- // LWG 4110
- auto deleter = [](auto pointer) { delete pointer; };
- std::shared_ptr<int> p(new int, deleter, std::allocator<int>());
- }
-#endif
-
return 0;
}
>From d9246cd48c19027134f8b3f7590cbb2981e31162 Mon Sep 17 00:00:00 2001
From: Hui <hui.xie0621 at gmail.com>
Date: Wed, 19 Jun 2024 10:22:34 +0100
Subject: [PATCH 5/5] test for NULL
---
.../util.smartptr.shared.const/pointer_deleter.pass.cpp | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter.pass.cpp b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter.pass.cpp
index 7c2ee78605c97..017e012e34b10 100644
--- a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter.pass.cpp
+++ b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter.pass.cpp
@@ -121,6 +121,10 @@ int main(int, char**)
auto deleter = [](auto pointer) { delete pointer; };
std::shared_ptr<int> p(new int, deleter);
}
+
+ {
+ std::shared_ptr<int> p(NULL, [](auto){});
+ }
#endif
#if TEST_STD_VER >= 17
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