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