python/include/boost/python/converter/pyobject_type.hpp at python313 · boostorg/python · GitHub

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// Copyright David Abrahams 2002.

// 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 PYOBJECT_TYPE_DWA2002720_HPP

# define PYOBJECT_TYPE_DWA2002720_HPP

# include <boost/python/cast.hpp>

namespace boost { namespace python { namespace converter {

BOOST_PYTHON_DECL inline

PyObject* checked_downcast_impl(PyObject *obj, PyTypeObject *type)

{

return (PyType_IsSubtype(Py_TYPE(obj), type) ? obj : NULL);

}

// Used as a base class for specializations which need to provide

// Python type checking capability.

template <class Object, PyTypeObject* pytype>

struct pyobject_type

{

static bool check(PyObject* x)

{

return ::PyObject_IsInstance(x, (PyObject*)pytype);

}

static Object* checked_downcast(PyObject* x)

{

return python::downcast<Object>(

(checked_downcast_impl)(x, pytype)

);

}

#ifndef BOOST_PYTHON_NO_PY_SIGNATURES

static PyTypeObject const* get_pytype() { return pytype; }

#endif

};

}}} // namespace boost::python::converter

#endif // PYOBJECT_TYPE_DWA2002720_HPP

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