python/detail/exception_handler.hpp

0001 // Copyright David Abrahams 2002.
0002 // Distributed under the Boost Software License, Version 1.0. (See
0003 // accompanying file LICENSE_1_0.txt or copy at
0004 // http://www.boost.org/LICENSE_1_0.txt)
0005 #ifndef EXCEPTION_HANDLER_DWA2002810_HPP
0006 # define EXCEPTION_HANDLER_DWA2002810_HPP
0007
0008 # include <boost/python/detail/config.hpp>
0009 # include <boost/function/function0.hpp>
0010 # include <boost/function/function2.hpp>
0011
0012 namespace boost { namespace python { namespace detail {
0013
0014 struct exception_handler;
0015
0016 typedef function2<bool, exception_handler const&, function0<void> const&> handler_function;
0017
0018 struct BOOST_PYTHON_DECL exception_handler
0019 {
0020  private: // types
0021
0022  public:
0023     explicit exception_handler(handler_function const& impl);
0024
0025     inline bool handle(function0<void> const& f) const;
0026
0027     bool operator()(function0<void> const& f) const;
0028
0029     static exception_handler* chain;
0030
0031  private:
0032     static exception_handler* tail;
0033
0034     handler_function m_impl;
0035     exception_handler* m_next;
0036 };
0037
0038
0039 inline bool exception_handler::handle(function0<void> const& f) const
0040 {
0041     return this->m_impl(*this, f);
0042 }
0043
0044 BOOST_PYTHON_DECL void register_exception_handler(handler_function const& f);
0045
0046 }}} // namespace boost::python::detail
0047
0048 #endif // EXCEPTION_HANDLER_DWA2002810_HPP