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// Copyright David Abrahams 2001.
// 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 BOOST_PYTHON_SOURCE
# define BOOST_PYTHON_SOURCE
#endif
#include <boost/python/errors.hpp>
#include <boost/cast.hpp>
#include <boost/python/detail/exception_handler.hpp>
namespace boost { namespace python {
error_already_set::~error_already_set() {}
// IMPORTANT: this function may only be called from within a catch block!
BOOST_PYTHON_DECL bool handle_exception_impl(function0<void> f)
{
try
{
if (detail::exception_handler::chain)
return detail::exception_handler::chain->handle(f);
f();
return false;
}
catch(const boost::python::error_already_set&)
{
// The python error reporting has already been handled.
}
catch(const std::bad_alloc&)
{
PyErr_NoMemory();
}
catch(const bad_numeric_cast& x)
{
PyErr_SetString(PyExc_OverflowError, x.what());
}
catch(const std::out_of_range& x)
{
PyErr_SetString(PyExc_IndexError, x.what());
}
catch(const std::invalid_argument& x)
{
PyErr_SetString(PyExc_ValueError, x.what());
}
catch(const std::exception& x)
{
PyErr_SetString(PyExc_RuntimeError, x.what());
}
catch(...)
{
PyErr_SetString(PyExc_RuntimeError, "unidentifiable C++ exception");
}
return true;
}
void BOOST_PYTHON_DECL throw_error_already_set()
{
throw error_already_set();
}
namespace detail {
bool exception_handler::operator()(function0<void> const& f) const
{
if (m_next)
{
return m_next->handle(f);
}
else
{
f();
return false;
}
}
exception_handler::exception_handler(handler_function const& impl)
: m_impl(impl)
, m_next(0)
{
if (chain != 0)
tail->m_next = this;
else
chain = this;
tail = this;
}
exception_handler* exception_handler::chain;
exception_handler* exception_handler::tail;
BOOST_PYTHON_DECL void register_exception_handler(handler_function const& f)
{
// the constructor links the new object into a handler chain, so
// this object isn't actaully leaked (until, of course, the
// interpreter exits).
new exception_handler(f);
}
} // namespace boost::python::detail
}} // namespace boost::python
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