Chris@16: // Copyright David Abrahams 2003.
Chris@16: // Distributed under the Boost Software License, Version 1.0. (See
Chris@16: // accompanying file LICENSE_1_0.txt or copy at
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: #ifndef DEF_VISITOR_DWA2003810_HPP
Chris@16: # define DEF_VISITOR_DWA2003810_HPP
Chris@16: 
Chris@16: # include <boost/python/detail/prefix.hpp>
Chris@16: # include <boost/detail/workaround.hpp>
Chris@16: 
Chris@16: namespace boost { namespace python { 
Chris@16: 
Chris@16: template <class DerivedVisitor> class def_visitor;
Chris@16: template <class T, class X1, class X2, class X3> class class_;
Chris@16: 
Chris@16: class def_visitor_access
Chris@16: {
Chris@16: # if defined(BOOST_NO_MEMBER_TEMPLATE_FRIENDS)                  \
Chris@16:     || BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
Chris@16:     // Tasteless as this may seem, making all members public allows member templates
Chris@16:     // to work in the absence of member template friends.
Chris@16:  public:
Chris@16: # else      
Chris@16:     template <class Derived> friend class def_visitor;
Chris@16: # endif
Chris@16:     
Chris@16:     // unnamed visit, c.f. init<...>, container suites
Chris@16:     template <class V, class classT>
Chris@16:     static void visit(V const& v, classT& c)
Chris@16:     {
Chris@16:         v.derived_visitor().visit(c);
Chris@16:     }
Chris@16: 
Chris@16:     // named visit, c.f. object, pure_virtual
Chris@16:     template <class V, class classT, class OptionalArgs>
Chris@16:     static void visit(
Chris@16:         V const& v
Chris@16:       , classT& c
Chris@16:       , char const* name
Chris@16:       , OptionalArgs const& options
Chris@16:     ) 
Chris@16:     {
Chris@16:         v.derived_visitor().visit(c, name, options);
Chris@16:     }
Chris@16:     
Chris@16: };
Chris@16: 
Chris@16: 
Chris@16: template <class DerivedVisitor>
Chris@16: class def_visitor
Chris@16: {
Chris@16:     friend class def_visitor_access;
Chris@16:     
Chris@16: # if defined(BOOST_NO_MEMBER_TEMPLATE_FRIENDS)                  \
Chris@16:     || BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
Chris@16:     // Tasteless as this may seem, making all members public allows member templates
Chris@16:     // to work in the absence of member template friends.
Chris@16:  public:
Chris@16: # else      
Chris@16:     template <class T, class X1, class X2, class X3> friend class class_;
Chris@16: # endif
Chris@16:     
Chris@16:     // unnamed visit, c.f. init<...>, container suites
Chris@16:     template <class classT>
Chris@16:     void visit(classT& c) const
Chris@16:     {
Chris@16:         def_visitor_access::visit(*this, c);
Chris@16:     }
Chris@16: 
Chris@16:     // named visit, c.f. object, pure_virtual
Chris@16:     template <class classT, class OptionalArgs>
Chris@16:     void visit(classT& c, char const* name, OptionalArgs const& options) const
Chris@16:     {
Chris@16:         def_visitor_access::visit(*this, c, name, options);
Chris@16:     }
Chris@16:     
Chris@16:  protected:
Chris@16:     DerivedVisitor const& derived_visitor() const
Chris@16:     {
Chris@16:         return static_cast<DerivedVisitor const&>(*this);
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: }} // namespace boost::python
Chris@16: 
Chris@16: #endif // DEF_VISITOR_DWA2003810_HPP