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