1 files changed, 71 insertions, 0 deletions
diff --git a/odb/odb/semantics/namespace.hxx b/odb/odb/semantics/namespace.hxx
new file mode 100644
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+++ b/odb/odb/semantics/namespace.hxx
@@ -0,0 +1,71 @@
+// file      : odb/semantics/namespace.hxx
+// license   : GNU GPL v3; see accompanying LICENSE file
+
+#ifndef ODB_SEMANTICS_NAMESPACE_HXX
+#define ODB_SEMANTICS_NAMESPACE_HXX
+
+#include <vector>
+
+#include <odb/semantics/elements.hxx>
+
+namespace semantics
+{
+  class namespace_: public scope
+  {
+    typedef std::vector<namespace_*> extensions_type;
+
+  public:
+    bool
+    extension () const
+    {
+      return original_ != 0;
+    }
+
+    namespace_&
+    original ()
+    {
+      return *original_;
+    }
+
+    void
+    original (namespace_& ns)
+    {
+      original_ = &ns;
+      ns.extensions_.push_back (this);
+    }
+
+  public:
+    typedef extensions_type::const_iterator extensions_iterator;
+
+    extensions_iterator
+    extensions_begin () const {return extensions_.begin ();}
+
+    extensions_iterator
+    extensions_end () const {return extensions_.end ();}
+
+  public:
+    virtual names*
+    lookup (string const& name,
+            type_id const&,
+            unsigned int flags = 0,
+            bool* hidden = 0) const;
+
+    using scope::lookup;
+
+  public:
+    namespace_ (path const&, size_t line, size_t column, tree);
+
+    // Resolve conflict between scope::scope and nameable::scope.
+    //
+    using nameable::scope;
+
+  protected:
+    namespace_ ();
+
+  private:
+    namespace_* original_;
+    extensions_type extensions_;
+  };
+}
+
+#endif // ODB_SEMANTICS_NAMESPACE_HXX