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+/* vim: set sw=4 sts=4 et foldmethod=syntax : */
+
+/*
+ * Copyright (c) 2005, 2006 Ciaran McCreesh <ciaranm@gentoo.org>
+ *
+ * This file is part of the Paludis package manager. Paludis is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU General
+ * Public License version 2, as published by the Free Software Foundation.
+ *
+ * Paludis 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, write to the Free Software Foundation, Inc., 59 Temple
+ * Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef PALUDIS_GUARD_PALUDIS_PRIVATE_IMPLEMENTATION_PATTERN_HH
+#define PALUDIS_GUARD_PALUDIS_PRIVATE_IMPLEMENTATION_PATTERN_HH 1
+
+#include <paludis/util/counted_ptr.hh>
+#include <paludis/util/instantiation_policy.hh>
+
+namespace paludis
+{
+ /**
+ * Private implementation data, to be specialised for any class that
+ * uses PrivateImplementationPattern.
+ */
+ template <typename C_>
+ struct Implementation;
+
+ /**
+ * A class descended from PrivateImplementationPattern has an associated
+ * Implementation instance.
+ */
+ template <typename C_>
+ class PrivateImplementationPattern :
+ private InstantiationPolicy<PrivateImplementationPattern<C_>, instantiation_method::NonCopyableTag>
+ {
+ protected:
+ /**
+ * Pointer to our implementation data.
+ */
+ CountedPtr<Implementation<C_>, count_policy::InternalCountTag> _implementation;
+
+ public:
+ /**
+ * Constructor.
+ */
+ explicit PrivateImplementationPattern(Implementation<C_> * i) :
+ _implementation(i)
+ {
+ }
+ };
+}
+
+#endif