comparison DEPENDENCIES/generic/include/boost/icl/detail/on_absorbtion.hpp @ 16:2665513ce2d3

Add boost headers

+/*-----------------------------------------------------------------------------+    
+Copyright (c) 2010-2010: Joachim Faulhaber
++------------------------------------------------------------------------------+
+   Distributed under the Boost Software License, Version 1.0.
+      (See accompanying file LICENCE.txt or copy at
+           http://www.boost.org/LICENSE_1_0.txt)
++-----------------------------------------------------------------------------*/
+#ifndef BOOST_ICL_TYPE_TRAITS_ON_ABSORBTION_HPP_JOFA_100915
+#define BOOST_ICL_TYPE_TRAITS_ON_ABSORBTION_HPP_JOFA_100915
+
+namespace boost{ namespace icl
+{
+
+template<class Type, class Combiner, bool absorbs_identities>
+struct on_absorbtion;
+
+template<class Type, class Combiner>
+struct on_absorbtion<Type, Combiner, false>
+{
+    typedef on_absorbtion type;
+    typedef typename Type::codomain_type codomain_type;
+
+    static bool is_absorbable(const codomain_type&){ return false; }
+};
+
+template<class Type, class Combiner>
+struct on_absorbtion<Type, Combiner, true>
+{
+    typedef on_absorbtion type;
+    typedef typename Type::codomain_type codomain_type;
+    typedef typename Type::codomain_combine codomain_combine;
+
+    static bool is_absorbable(const codomain_type& co_value)
+    {
+        return co_value == Combiner::identity_element();
+    }
+};
+
+}} // namespace boost icl
+
+#endif
+
+