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GeezerVison is showing github.com — python/include/boost/python/def_visitor.hpp at develop · gladk/python

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def_visitor.hpp

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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(BOOST_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(BOOST_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
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