Tested on Linux-x64.
The issue doesn't have a proposed resolution yet, so we can certainly wait
with this, but I have an inkling that this implementation is what the proposed
resolution must say. :)
2016-12-20 Ville Voutilainen <ville.voutilai...@gmail.com>
Implement 2801, Default-constructibility of unique_ptr.
* include/bits/unique_ptr.h (unique_ptr()): Constrain.
(unique_ptr(pointer)): Likewise.
(unique_ptr(nullptr_t)): Likewise.
(unique_ptr<_Tp[], _Dp>::unique_ptr()): Likewise.
(unique_ptr<_Tp[], _Dp>::unique_ptr(_Up)): Likewise.
(unique_ptr<_Tp[], _Dp>::unique_ptr(nullptr_t)): Likewise.
* testsuite/20_util/unique_ptr/assign/48635_neg.cc: Adjust.
* testsuite/20_util/unique_ptr/cons/cv_qual_neg.cc: Likewise.
* testsuite/20_util/unique_ptr/cons/default.cc: New.
* testsuite/20_util/unique_ptr/cons/ptr_deleter_neg.cc: Adjust.
diff --git a/libstdc++-v3/include/bits/unique_ptr.h
b/libstdc++-v3/include/bits/unique_ptr.h
index 56e6ec0..63dff37 100644
--- a/libstdc++-v3/include/bits/unique_ptr.h
+++ b/libstdc++-v3/include/bits/unique_ptr.h
@@ -175,10 +175,14 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
// Constructors.
/// Default constructor, creates a unique_ptr that owns nothing.
+ template <typename _Up = deleter_type,
+ typename enable_if<
+ __and_<__not_<is_pointer<_Up>>,
+ is_default_constructible<_Up>>::value,
+ bool>::type = false>
constexpr unique_ptr() noexcept
: _M_t()
- { static_assert(!is_pointer<deleter_type>::value,
- "constructed with null function pointer deleter"); }
+ { }
/** Takes ownership of a pointer.
*
@@ -186,11 +190,15 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
*
* The deleter will be value-initialized.
*/
+ template <typename _Up = deleter_type,
+ typename enable_if<
+ __and_<__not_<is_pointer<_Up>>,
+ is_default_constructible<_Up>>::value,
+ bool>::type = false>
explicit
unique_ptr(pointer __p) noexcept
: _M_t(__p)
- { static_assert(!is_pointer<deleter_type>::value,
- "constructed with null function pointer deleter"); }
+ { }
/** Takes ownership of a pointer.
*
@@ -218,6 +226,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
"rvalue deleter bound to reference"); }
/// Creates a unique_ptr that owns nothing.
+ template <typename _Up = deleter_type,
+ typename enable_if<
+ __and_<__not_<is_pointer<_Up>>,
+ is_default_constructible<_Up>>::value,
+ bool>::type = false>
constexpr unique_ptr(nullptr_t) noexcept : unique_ptr() { }
// Move constructors.
@@ -432,10 +445,14 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
// Constructors.
/// Default constructor, creates a unique_ptr that owns nothing.
+ template <typename _Up = deleter_type,
+ typename enable_if<
+ __and_<__not_<is_pointer<_Up>>,
+ is_default_constructible<_Up>>::value,
+ bool>::type = false>
constexpr unique_ptr() noexcept
: _M_t()
- { static_assert(!std::is_pointer<deleter_type>::value,
- "constructed with null function pointer deleter"); }
+ { }
/** Takes ownership of a pointer.
*
@@ -445,13 +462,17 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
* The deleter will be value-initialized.
*/
template<typename _Up,
- typename = typename enable_if<
+ typename _Vp = deleter_type,
+ typename enable_if<
+ __and_<__not_<is_pointer<_Vp>>,
+ is_default_constructible<_Vp>>::value,
+ bool>::type = false,
+ typename = typename enable_if<
__safe_conversion_raw<_Up>::value, bool>::type>
explicit
unique_ptr(_Up __p) noexcept
: _M_t(__p)
- { static_assert(!is_pointer<deleter_type>::value,
- "constructed with null function pointer deleter"); }
+ { }
/** Takes ownership of a pointer.
*
@@ -491,6 +512,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
: _M_t(__u.release(), std::forward<deleter_type>(__u.get_deleter())) { }
/// Creates a unique_ptr that owns nothing.
+ template <typename _Up = deleter_type,
+ typename enable_if<
+ __and_<__not_<is_pointer<_Up>>,
+ is_default_constructible<_Up>>::value,
+ bool>::type = false>
constexpr unique_ptr(nullptr_t) noexcept : unique_ptr() { }
template<typename _Up, typename _Ep,
diff --git a/libstdc++-v3/testsuite/20_util/unique_ptr/assign/48635_neg.cc
b/libstdc++-v3/testsuite/20_util/unique_ptr/assign/48635_neg.cc
index e9655f1..2489b26 100644
--- a/libstdc++-v3/testsuite/20_util/unique_ptr/assign/48635_neg.cc
+++ b/libstdc++-v3/testsuite/20_util/unique_ptr/assign/48635_neg.cc
@@ -42,10 +42,10 @@ void f()
std::unique_ptr<int, D&> ud(nullptr, d);
ub = std::move(ud); // { dg-error "no match" }
ub2 = ud; // { dg-error "no match" }
-// { dg-error "no type" "" { target *-*-* } 289 }
+// { dg-error "no type" "" { target *-*-* } 302 }
std::unique_ptr<int[], B&> uba(nullptr, b);
std::unique_ptr<int[], D&> uda(nullptr, d);
uba = std::move(uda); // { dg-error "no match" }
-// { dg-error "no type" "" { target *-*-* } 540 }
+// { dg-error "no type" "" { target *-*-* } 566 }
}
diff --git a/libstdc++-v3/testsuite/20_util/unique_ptr/cons/cv_qual_neg.cc
b/libstdc++-v3/testsuite/20_util/unique_ptr/cons/cv_qual_neg.cc
index 3e6f41b..824f3c3 100644
--- a/libstdc++-v3/testsuite/20_util/unique_ptr/cons/cv_qual_neg.cc
+++ b/libstdc++-v3/testsuite/20_util/unique_ptr/cons/cv_qual_neg.cc
@@ -39,7 +39,7 @@ test07()
std::unique_ptr<const A[]> cA3(p); // { dg-error "no matching function" }
std::unique_ptr<volatile A[]> vA3(p); // { dg-error "no matching function" }
std::unique_ptr<const volatile A[]> cvA3(p); // { dg-error "no matching
function" }
- // { dg-error "no type" "" { target *-*-* } 448 }
+ // { dg-error "no type" "" { target *-*-* } 470 }
}
template<typename T>
diff --git a/libstdc++-v3/testsuite/20_util/unique_ptr/cons/default.cc
b/libstdc++-v3/testsuite/20_util/unique_ptr/cons/default.cc
new file mode 100644
index 0000000..968b2f1
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/unique_ptr/cons/default.cc
@@ -0,0 +1,40 @@
+// { dg-do compile { target c++11 } }
+
+// Copyright (C) 2011-2016 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/>.
+
+#include <memory>
+#include <type_traits>
+
+static_assert(!std::is_default_constructible<std::unique_ptr<int,
+ std::default_delete<int>&>>::value, "");
+static_assert(!std::is_default_constructible<std::unique_ptr<int,
+ void(*)(int*)>>::value, "");
+static_assert(!std::is_constructible<std::unique_ptr<int,
+ std::default_delete<int>&>, int*>::value, "");
+static_assert(!std::is_constructible<std::unique_ptr<int,
+ void(*)(int*)>, int*>::value, "");
+
+static_assert(!std::is_default_constructible<std::unique_ptr<int[],
+ std::default_delete<int>&>>::value, "");
+static_assert(!std::is_default_constructible<std::unique_ptr<int[],
+ void(*)(int*)>>::value, "");
+static_assert(!std::is_constructible<std::unique_ptr<int[],
+ std::default_delete<int>&>, int*>::value, "");
+static_assert(!std::is_constructible<std::unique_ptr<int[],
+ void(*)(int*)>, int*>::value, "");
+
diff --git a/libstdc++-v3/testsuite/20_util/unique_ptr/cons/ptr_deleter_neg.cc
b/libstdc++-v3/testsuite/20_util/unique_ptr/cons/ptr_deleter_neg.cc
index 1aa8d43..b7d97e6 100644
--- a/libstdc++-v3/testsuite/20_util/unique_ptr/cons/ptr_deleter_neg.cc
+++ b/libstdc++-v3/testsuite/20_util/unique_ptr/cons/ptr_deleter_neg.cc
@@ -23,26 +23,31 @@
using std::unique_ptr;
-// { dg-prune-output "static assertion failed" }
+// { dg-error "no type" "" { target *-*-* } 182 }
+// { dg-error "no type" "" { target *-*-* } 197 }
+// { dg-error "no type" "" { target *-*-* } 233 }
+// { dg-error "no type" "" { target *-*-* } 452 }
+// { dg-error "no type" "" { target *-*-* } 469 }
+// { dg-error "no type" "" { target *-*-* } 519 }
void
test01()
{
- unique_ptr<long, void(*)(long*)> p1; // { dg-error "here" }
+ unique_ptr<long, void(*)(long*)> p1; // { dg-error "no matching" }
- unique_ptr<short, void(*)(short*)> p2(nullptr); // { dg-error "here" }
+ unique_ptr<short, void(*)(short*)> p2(nullptr); // { dg-error "no matching" }
- unique_ptr<int, void(*)(int*)> p3(new int); // { dg-error "here" }
+ unique_ptr<int, void(*)(int*)> p3(new int); // { dg-error "no matching" }
}
void
test02()
{
- unique_ptr<long[], void(*)(long*)> p1; // { dg-error "here" }
+ unique_ptr<long[], void(*)(long*)> p1; // { dg-error "no matching" }
- unique_ptr<short[], void(*)(short*)> p2(nullptr); // { dg-error "here" }
+ unique_ptr<short[], void(*)(short*)> p2(nullptr); // { dg-error "no
matching" }
- unique_ptr<int[], void(*)(int*)> p3(new int[1]); // { dg-error "here" }
+ unique_ptr<int[], void(*)(int*)> p3(new int[1]); // { dg-error "no matching"
}
}
