100 lines
2.6 KiB
C++
100 lines
2.6 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 TO_PYTHON_CONVERTER_DWA200221_HPP
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# define TO_PYTHON_CONVERTER_DWA200221_HPP
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# include <boost/python/detail/prefix.hpp>
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# include <boost/python/converter/registry.hpp>
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# include <boost/python/converter/as_to_python_function.hpp>
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#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
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# include <boost/python/converter/pytype_function.hpp>
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#endif
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# include <boost/python/type_id.hpp>
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namespace boost { namespace python {
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#if 0 //get_pytype member detection
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namespace detail
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{
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typedef char yes_type;
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typedef struct {char a[2]; } no_type;
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template<PyTypeObject const * (*f)()> struct test_get_pytype1 { };
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template<PyTypeObject * (*f)()> struct test_get_pytype2 { };
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template<class T> yes_type tester(test_get_pytype1<&T::get_pytype>*);
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template<class T> yes_type tester(test_get_pytype2<&T::get_pytype>*);
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template<class T> no_type tester(...);
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template<class T>
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struct test_get_pytype_base
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{
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BOOST_STATIC_CONSTANT(bool, value= (sizeof(detail::tester<T>(0)) == sizeof(yes_type)));
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};
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template<class T>
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struct test_get_pytype : boost::mpl::bool_<test_get_pytype_base<T>::value>
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{
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};
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}
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#endif
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template < class T, class Conversion, bool has_get_pytype=false >
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struct to_python_converter
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{
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#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
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#if 0 //defined _MSC_VER && _MSC_VER >=1310
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//probably other compilers could come here as well
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typedef typename detail::test_get_pytype<Conversion> HasGetPytype;
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#else
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typedef boost::mpl::bool_<has_get_pytype> HasGetPytype;
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#endif
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static PyTypeObject const* get_pytype_1(boost::mpl::true_ *)
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{
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return Conversion::get_pytype();
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}
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static PyTypeObject const* get_pytype_1(boost::mpl::false_ *)
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{
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return 0;
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}
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static PyTypeObject const* get_pytype_impl()
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{
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return get_pytype_1((HasGetPytype*)0);
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}
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#endif
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to_python_converter();
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};
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//
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// implementation
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//
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template <class T, class Conversion ,bool has_get_pytype>
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to_python_converter<T,Conversion, has_get_pytype>::to_python_converter()
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{
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typedef converter::as_to_python_function<
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T, Conversion
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> normalized;
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converter::registry::insert(
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&normalized::convert
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, type_id<T>()
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#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
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, &get_pytype_impl
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#endif
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);
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}
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}} // namespace boost::python
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#endif // TO_PYTHON_CONVERTER_DWA200221_HPP
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