100 lines
3.0 KiB
C++
100 lines
3.0 KiB
C++
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// Copyright David Abrahams 2002.
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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 REGISTRATIONS_DWA2002223_HPP
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# define REGISTRATIONS_DWA2002223_HPP
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# include <boost/python/detail/prefix.hpp>
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# include <boost/python/type_id.hpp>
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# include <boost/python/converter/convertible_function.hpp>
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# include <boost/python/converter/constructor_function.hpp>
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# include <boost/python/converter/to_python_function_type.hpp>
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# include <boost/detail/workaround.hpp>
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namespace boost { namespace python { namespace converter {
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struct lvalue_from_python_chain
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{
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convertible_function convert;
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lvalue_from_python_chain* next;
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};
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struct rvalue_from_python_chain
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{
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convertible_function convertible;
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constructor_function construct;
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PyTypeObject const* (*expected_pytype)();
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rvalue_from_python_chain* next;
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};
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struct BOOST_PYTHON_DECL registration
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{
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public: // member functions
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explicit registration(type_info target, bool is_shared_ptr = false);
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~registration();
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// Convert the appropriately-typed data to Python
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PyObject* to_python(void const volatile*) const;
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// Return the class object, or raise an appropriate Python
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// exception if no class has been registered.
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PyTypeObject* get_class_object() const;
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// Return common denominator of the python class objects,
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// convertable to target. Inspects the m_class_object and the value_chains.
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PyTypeObject const* expected_from_python_type() const;
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PyTypeObject const* to_python_target_type() const;
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public: // data members. So sue me.
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const python::type_info target_type;
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// The chain of eligible from_python converters when an lvalue is required
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lvalue_from_python_chain* lvalue_chain;
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// The chain of eligible from_python converters when an rvalue is acceptable
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rvalue_from_python_chain* rvalue_chain;
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// The class object associated with this type
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PyTypeObject* m_class_object;
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// The unique to_python converter for the associated C++ type.
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to_python_function_t m_to_python;
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PyTypeObject const* (*m_to_python_target_type)();
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// True iff this type is a shared_ptr. Needed for special rvalue
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// from_python handling.
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const bool is_shared_ptr;
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# if BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003))
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private:
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void operator=(registration); // This is not defined, and just keeps MWCW happy.
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# endif
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};
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//
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// implementations
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//
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inline registration::registration(type_info target_type, bool is_shared_ptr)
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: target_type(target_type)
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, lvalue_chain(0)
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, rvalue_chain(0)
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, m_class_object(0)
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, m_to_python(0)
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, m_to_python_target_type(0)
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, is_shared_ptr(is_shared_ptr)
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{}
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inline bool operator<(registration const& lhs, registration const& rhs)
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{
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return lhs.target_type < rhs.target_type;
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}
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}}} // namespace boost::python::converter
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#endif // REGISTRATIONS_DWA2002223_HPP
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