Backmerge of last trunk modifications

git-svn-id: svn+ssh://scm.gforge.inria.fr/svnroot/gudhi/branches/alphashapes@959 636b058d-ea47-450e-bf9e-a15bfbe3eedb

Former-commit-id: a5c6ef0ae2ee1e18fff88b98131ff4d14a252152

1 files changed, 55 insertions, 0 deletions

diff --git a/src/common/include/gudhi/allocator.h b/src/common/include/gudhi/allocator.h
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+++ b/src/common/include/gudhi/allocator.h
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+/*    This file is part of the Gudhi Library. The Gudhi library
+ *    (Geometric Understanding in Higher Dimensions) is a generic C++
+ *    library for computational topology.
+ *
+ *    Author(s):       Marc Glisse
+ *
+ *    Copyright (C) 2015  INRIA Saclay - Ile de France
+ *
+ *    This program 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 of the License, or
+ *    (at your option) any later version.
+ *
+ *    This program 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 program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef ALLOCATOR_H_
+#define ALLOCATOR_H_
+
+#include <memory>
+#include <utility>
+
+namespace Gudhi {
+
+/** \private
+ * An allocator that can be used to build an uninitialized vector.
+ */
+template <class T, class Base = std::allocator<T>>
+struct no_init_allocator : Base {
+  typedef std::allocator_traits<Base> Base_traits;
+  template <class U> struct rebind {
+    typedef no_init_allocator<U, typename Base_traits::template rebind_alloc<U>> other;
+  };
+
+  // Inherit constructors.
+  using Base::Base;
+
+  // Do nothing: that's the whole point!
+  template<class P>
+  void construct(P*) noexcept {}
+
+  template<class P, class...U> void construct(P*p, U&&...u) {
+    Base_traits::construct(*(Base*)this, p, std::forward<U>(u)...);
+  }
+};
+
+}  // namespace Gudhi
+
+#endif  // ALLOCATOR_H_