diff options
author | Jonathan Wakely <jwakely@redhat.com> | 2018-10-23 14:10:26 +0100 |
---|---|---|
committer | Jonathan Wakely <redi@gcc.gnu.org> | 2018-10-23 14:10:26 +0100 |
commit | c3ba63c314d61362f7c48c4feeefa13ea3978344 (patch) | |
tree | 3c251d913f928aff73255661bf886c61668373ac /libstdc++-v3 | |
parent | 99c24b911b385a3dddfe8fe5730d2c659a92222a (diff) | |
download | gcc-c3ba63c314d61362f7c48c4feeefa13ea3978344.tar.gz |
PR libstdc++/87704 fix unique_ptr(nullptr_t) constructors
Using a delegating constructor to implement these constructors means
that they instantiate the destructor, which requires the element_type to
be complete. In C++11 and C++14 they were specified to be delegating,
but that was changed as part of LWG 2801 so in C++17 they don't require
a complete type (as was intended all along).
PR libstdc++/87704
* include/bits/unique_ptr.h (unique_ptr::unique_ptr(nullptr_t)): Do
not delegate to default constructor.
(unique_ptr<T[], D>::unique_ptr(nullptr_t)): Likewise.
* testsuite/20_util/unique_ptr/cons/incomplete.cc: New test.
From-SVN: r265423
Diffstat (limited to 'libstdc++-v3')
-rw-r--r-- | libstdc++-v3/ChangeLog | 8 | ||||
-rw-r--r-- | libstdc++-v3/include/bits/unique_ptr.h | 12 | ||||
-rw-r--r-- | libstdc++-v3/testsuite/20_util/unique_ptr/cons/incomplete.cc | 32 |
3 files changed, 48 insertions, 4 deletions
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog index 438206b33a8..7c583dd726e 100644 --- a/libstdc++-v3/ChangeLog +++ b/libstdc++-v3/ChangeLog @@ -1,3 +1,11 @@ +2018-10-23 Jonathan Wakely <jwakely@redhat.com> + + PR libstdc++/87704 + * include/bits/unique_ptr.h (unique_ptr::unique_ptr(nullptr_t)): Do + not delegate to default constructor. + (unique_ptr<T[], D>::unique_ptr(nullptr_t)): Likewise. + * testsuite/20_util/unique_ptr/cons/incomplete.cc: New test. + 2018-10-20 François Dumont <fdumont@gcc.gnu.org> * testsuite/util/testsuite_containers.h diff --git a/libstdc++-v3/include/bits/unique_ptr.h b/libstdc++-v3/include/bits/unique_ptr.h index 0717c1e2728..dcb866d37bc 100644 --- a/libstdc++-v3/include/bits/unique_ptr.h +++ b/libstdc++-v3/include/bits/unique_ptr.h @@ -195,7 +195,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION template<typename _Del = _Dp, typename = _DeleterConstraint<_Del>> constexpr unique_ptr() noexcept : _M_t() - { } + { } /** Takes ownership of a pointer. * @@ -244,7 +244,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION /// Creates a unique_ptr that owns nothing. template<typename _Del = _Dp, typename = _DeleterConstraint<_Del>> - constexpr unique_ptr(nullptr_t) noexcept : unique_ptr() { } + constexpr unique_ptr(nullptr_t) noexcept + : _M_t() + { } // Move constructors. @@ -472,7 +474,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION template<typename _Del = _Dp, typename = _DeleterConstraint<_Del>> constexpr unique_ptr() noexcept : _M_t() - { } + { } /** Takes ownership of a pointer. * @@ -535,7 +537,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION /// Creates a unique_ptr that owns nothing. template<typename _Del = _Dp, typename = _DeleterConstraint<_Del>> - constexpr unique_ptr(nullptr_t) noexcept : unique_ptr() { } + constexpr unique_ptr(nullptr_t) noexcept + : _M_t() + { } template<typename _Up, typename _Ep, typename = _Require<__safe_conversion_up<_Up, _Ep>>> diff --git a/libstdc++-v3/testsuite/20_util/unique_ptr/cons/incomplete.cc b/libstdc++-v3/testsuite/20_util/unique_ptr/cons/incomplete.cc new file mode 100644 index 00000000000..1a8f28838a1 --- /dev/null +++ b/libstdc++-v3/testsuite/20_util/unique_ptr/cons/incomplete.cc @@ -0,0 +1,32 @@ +// Copyright (C) 2018 Free Software Foundation, Inc. +// +// This file is part of the GNU ISO C++ Library. This library is free +// software; you can redistribute it and/or modify it under the +// terms of the GNU General Public License as published by the +// Free Software Foundation; either version 3, or (at your option) +// any later version. + +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License along +// with this library; see the file COPYING3. If not see +// <http://www.gnu.org/licenses/>. + +// { dg-do compile { target c++11 } } + +#include <memory> + +struct Incomplete; + +void f(void** p) +{ + ::new (p[0]) std::unique_ptr<Incomplete>(); + ::new (p[1]) std::unique_ptr<Incomplete[]>(); + + // PR libstdc++/87704 + ::new (p[2]) std::unique_ptr<Incomplete>(nullptr); + ::new (p[3]) std::unique_ptr<Incomplete[]>(nullptr); +} |