Re: _ExtPtr_allocator

Re: _ExtPtr_allocator

[Jonathan Wakely]

[-- Attachment #1: Type: text/plain, Size: 1031 bytes --]

On 10 June 2011 22:06, Jonathan Wakely wrote:
>
> * overload construct and destroy so both the old- and new-style
> signatures are present.
>
>      template<typename... _Args>
>        void
>        construct(pointer __p, _Args&&... __args)
>        { construct(__p.get(), std::forward<_Args>(__args)...); }
>
>      void destroy(pointer __p)
>      { destroy(__p.get()); }

Here's a patch implementing this option along with some tests to use
the ExtPtr_allocator in C++0x mode Those tests fail without the patch
so I'm committing this so that ExtPtr_allocator isn't completely
broken in C++0x mode.

2011-06-11  Jonathan Wakely  <jwakely.gcc@gmail.com>

        * include/ext/extptr_allocator.h (construct, destroy): Fix for C++0x
        mode by overloading to take allocator's pointer type.
        * testsuite/23_containers/vector/ext_pointer/types/2.cc: New.
        * testsuite/23_containers/vector/ext_pointer/explicit_instantiation/
        2.cc: New.

Tested x86_64-linux, committed to trunk.

[-- Attachment #2: extptr_alloc.txt --]
[-- Type: text/plain, Size: 4270 bytes --]

Index: include/ext/extptr_allocator.h
===================================================================
--- include/ext/extptr_allocator.h	(revision 174931)
+++ include/ext/extptr_allocator.h	(working copy)
@@ -107,10 +107,19 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
         construct(_Up* __p, _Args&&... __args)
 	{ ::new((void *)__p) _Up(std::forward<_Args>(__args)...); }
 
+      template<typename... _Args>
+        void
+        construct(pointer __p, _Args&&... __args)
+	{ construct(__p.get(), std::forward<_Args>(__args)...); }
+
       template<typename _Up>
         void 
         destroy(_Up* __p)
         { __p->~_Up(); }
+
+      void destroy(pointer __p)
+      { destroy(__p.get()); }
+
 #else
 
       void construct(pointer __p, const _Tp& __val)
Index: testsuite/23_containers/vector/ext_pointer/types/2.cc
===================================================================
--- testsuite/23_containers/vector/ext_pointer/types/2.cc	(revision 0)
+++ testsuite/23_containers/vector/ext_pointer/types/2.cc	(revision 0)
@@ -0,0 +1,63 @@
+// Test for Container using non-standard pointer types.
+
+// Copyright (C) 2011
+// 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-options "-std=gnu++0x" }
+
+// This is a copy of vector/types/1.cc with altered allocator.
+// The operator+()s in this test initially failed the test -
+// they stress the accurate recognition, by the compiler,
+// of _Pointer_adapter's own pointer arithmetic functions,
+// which have to match perfectly on the int type to get
+// chosen by the compiler when it sees: _Pointer_adapter<T> + int, etc.
+
+#include <vector>
+#include <ext/extptr_allocator.h>
+
+namespace N
+{
+  struct X { };
+
+  template<typename T>
+    X operator+(T, std::size_t)
+    { return X(); }
+
+  template<typename T>
+    X operator-(T, T)
+    { return X(); }
+}
+
+int main()
+{
+  std::vector<N::X, __gnu_cxx::_ExtPtr_allocator<N::X> > v(5);
+  const std::vector<N::X, __gnu_cxx::_ExtPtr_allocator<N::X> > w(1);
+
+  v[0];
+  w[0];
+  v.size();
+  v.capacity();
+  v.resize(1);
+  v.insert(v.begin(), N::X());
+  v.insert(v.begin(), 1, N::X());
+  v.insert(v.begin(), w.begin(), w.end());
+  v = w;
+
+  return 0;
+}
Index: testsuite/23_containers/vector/ext_pointer/explicit_instantiation/2.cc
===================================================================
--- testsuite/23_containers/vector/ext_pointer/explicit_instantiation/2.cc	(revision 0)
+++ testsuite/23_containers/vector/ext_pointer/explicit_instantiation/2.cc	(revision 0)
@@ -0,0 +1,28 @@
+// Test for Container using non-standard pointer types.
+
+// Copyright (C) 2011
+// 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 <vector>
+#include <ext/extptr_allocator.h>
+
+// { dg-do compile }
+// { dg-options "-std=gnu++0x" }
+
+template class std::vector<int, __gnu_cxx::_ExtPtr_allocator<int> >;