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