1// Copyright David Abrahams 2003.
2// Distributed under the Boost Software License, Version 1.0. (See
3// accompanying file LICENSE_1_0.txt or copy at
4// http://www.boost.org/LICENSE_1_0.txt)
5#ifndef DEF_VISITOR_DWA2003810_HPP
6# define DEF_VISITOR_DWA2003810_HPP
7
8# include <boost/python/detail/prefix.hpp>
9# include <boost/detail/workaround.hpp>
10
11namespace boost { namespace python {
12
13template <class DerivedVisitor> class def_visitor;
14template <class T, class X1, class X2, class X3> class class_;
15
16class def_visitor_access
17{
18# if defined(BOOST_NO_MEMBER_TEMPLATE_FRIENDS) \
19 || BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
20 // Tasteless as this may seem, making all members public allows member templates
21 // to work in the absence of member template friends.
22 public:
23# else
24 template <class Derived> friend class def_visitor;
25# endif
26
27 // unnamed visit, c.f. init<...>, container suites
28 template <class V, class classT>
29 static void visit(V const& v, classT& c)
30 {
31 v.derived_visitor().visit(c);
32 }
33
34 // named visit, c.f. object, pure_virtual
35 template <class V, class classT, class OptionalArgs>
36 static void visit(
37 V const& v
38 , classT& c
39 , char const* name
40 , OptionalArgs const& options
41 )
42 {
43 v.derived_visitor().visit(c, name, options);
44 }
45
46};
47
48
49template <class DerivedVisitor>
50class def_visitor
51{
52 friend class def_visitor_access;
53
54# if defined(BOOST_NO_MEMBER_TEMPLATE_FRIENDS) \
55 || BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
56 // Tasteless as this may seem, making all members public allows member templates
57 // to work in the absence of member template friends.
58 public:
59# else
60 template <class T, class X1, class X2, class X3> friend class class_;
61# endif
62
63 // unnamed visit, c.f. init<...>, container suites
64 template <class classT>
65 void visit(classT& c) const
66 {
67 def_visitor_access::visit(*this, c);
68 }
69
70 // named visit, c.f. object, pure_virtual
71 template <class classT, class OptionalArgs>
72 void visit(classT& c, char const* name, OptionalArgs const& options) const
73 {
74 def_visitor_access::visit(*this, c, name, options);
75 }
76
77 protected:
78 DerivedVisitor const& derived_visitor() const
79 {
80 return static_cast<DerivedVisitor const&>(*this);
81 }
82};
83
84}} // namespace boost::python
85
86#endif // DEF_VISITOR_DWA2003810_HPP
87

source code of boost/boost/python/def_visitor.hpp