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+// file : xsd/cxx/tree/comparison-map.hxx
+// author : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : Copyright (c) 2005-2009 Code Synthesis Tools CC
+// license : GNU GPL v2 + exceptions; see accompanying LICENSE file
+
+#ifndef XSD_CXX_TREE_COMPARISON_MAP_HXX
+#define XSD_CXX_TREE_COMPARISON_MAP_HXX
+
+#include <map>
+#include <cstddef> // std::size_t
+#include <typeinfo>
+
+#include <xsd/cxx/tree/elements.hxx>
+
+namespace xsd
+{
+ namespace cxx
+ {
+ namespace tree
+ {
+ template <typename C>
+ struct comparison_map
+ {
+ typedef std::type_info type_id;
+ typedef bool (*comparator) (const type&, const type&);
+
+ comparison_map ();
+
+ void
+ register_type (const type_id&, comparator, bool override = true);
+
+ bool
+ compare (const type&, const type&);
+
+ public:
+ comparator
+ find (const type_id&) const;
+
+ private:
+ struct type_id_comparator
+ {
+ bool
+ operator() (const type_id* x, const type_id* y) const
+ {
+ // XL C++ on AIX has buggy type_info::before() in that
+ // it returns true for two different type_info objects
+ // that happened to be for the same type.
+ //
+#if defined(__xlC__) && defined(_AIX)
+ return *x != *y && x->before (*y);
+#else
+ return x->before (*y);
+#endif
+ }
+ };
+
+ typedef
+ std::map<const type_id*, comparator, type_id_comparator>
+ type_map;
+
+ type_map type_map_;
+ };
+
+ //
+ //
+ template<unsigned long id, typename C>
+ struct comparison_plate
+ {
+ static comparison_map<C>* map;
+ static std::size_t count;
+
+ comparison_plate ();
+ ~comparison_plate ();
+ };
+
+ template<unsigned long id, typename C>
+ comparison_map<C>* comparison_plate<id, C>::map = 0;
+
+ template<unsigned long id, typename C>
+ std::size_t comparison_plate<id, C>::count = 0;
+
+
+ //
+ //
+ template<unsigned long id, typename C>
+ inline comparison_map<C>&
+ comparison_map_instance ()
+ {
+ return *comparison_plate<id, C>::map;
+ }
+
+ //
+ //
+ template<typename T>
+ bool
+ comparator_impl (const type&, const type&);
+
+ template<unsigned long id, typename C, typename T>
+ struct comparison_initializer
+ {
+ comparison_initializer ();
+ };
+ }
+ }
+}
+
+#include <xsd/cxx/tree/comparison-map.txx>
+
+#endif // XSD_CXX_TREE_COMPARISON_MAP_HXX