+/*
+ * This file is part of the GROMACS molecular simulation package.
+ *
+ * Copyright (c) 2017,2018, by the GROMACS development team, led by
+ * Mark Abraham, David van der Spoel, Berk Hess, and Erik Lindahl,
+ * and including many others, as listed in the AUTHORS file in the
+ * top-level source directory and at http://www.gromacs.org.
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+#ifndef GMX_COMPAT_MAKE_UNIQUE_H
+#define GMX_COMPAT_MAKE_UNIQUE_H
+/*! \libinternal
+ * \defgroup module_compat C++ standard library compatibility helpers.
+ * \brief Provide uniform interface to selected C++ standard library features.
+ *
+ * For some features not available on all platforms supported by
+ * \Gromacs, provide back-ports or mappings to available standard
+ * library implementations as appropriate.
+ */
+
+/*!
+ * \file
+ * \brief Provides template gmx::compat::make_unique
+ *
+ * The implementation of gmx::compat::make_unique is copied with little
+ * modification from C++ standardization doc N3656
+ * at http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3656.htm
+ * though additional wrapping has been added for use in \Gromacs.
+ *
+ * \author M. Eric Irrgang <ericirrgang@gmail.com>
+ * \ingroup module_compat
+ * \inlibraryapi
+ */
+/*! \addtogroup module_compat
+ * ### gmx::compat::make_unique
+ *
+ * Provide a trivially adapted implementation of the C++ standard library `make_unique` function template.
+ * When All supported \Gromacs build platforms provide `std::make_unique`, this should be removed.
+ *
+ */
+#include <cstddef>
+
+#include <memory>
+#include <type_traits>
+#include <utility>
+
+namespace gmx
+{
+namespace compat
+{
+
+///\cond
+
+// All gmx::compat code should use std::unique_ptr
+using ::std::unique_ptr;
+
+template<class T> struct Unique_if {
+ typedef unique_ptr<T> Single_object;
+};
+
+template<class T> struct Unique_if<T[]> {
+ typedef unique_ptr<T[]> Unknown_bound;
+};
+
+template<class T, size_t N> struct Unique_if<T[N]> {
+ typedef void Known_bound;
+};
+
+template<class T, class ... Args>
+typename Unique_if<T>::Single_object
+make_unique(Args && ... args)
+{
+ return unique_ptr<T>(new T(::std::forward<Args>(args) ...));
+}
+
+template<class T>
+typename Unique_if<T>::Unknown_bound
+make_unique(size_t n)
+{
+ typedef typename ::std::remove_extent<T>::type U;
+ return unique_ptr<T>(new U[n]());
+}
+
+template<class T, class ... Args>
+typename Unique_if<T>::Known_bound
+make_unique(Args && ...) = delete;
+
+///\endcond
+
+} // namespace compat
+} // namespace gmx
+
+#endif // header guard