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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_