Chris@16: //  Boost system_error.hpp  --------------------------------------------------//
Chris@16: 
Chris@16: //  Copyright Beman Dawes 2006
Chris@16: 
Chris@16: //  Distributed under the Boost Software License, Version 1.0. (See accompanying
Chris@16: //  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16: #ifndef BOOST_SYSTEM_ERROR_HPP
Chris@16: #define BOOST_SYSTEM_ERROR_HPP
Chris@16: 
Chris@16: #include <string>
Chris@16: #include <stdexcept>
Chris@16: #include <cassert>
Chris@16: #include <boost/system/error_code.hpp>
Chris@16: 
Chris@16: namespace boost
Chris@16: {
Chris@16:   namespace system
Chris@16:   {
Chris@16:     //  class system_error  ------------------------------------------------------------//
Chris@16: 
Chris@16:     class BOOST_SYMBOL_VISIBLE system_error : public std::runtime_error
Chris@16:     // BOOST_SYMBOL_VISIBLE is needed by GCC to ensure system_error thrown from a shared
Chris@16:     // library can be caught. See svn.boost.org/trac/boost/ticket/3697
Chris@16:     {
Chris@16:     public:
Chris@16:       system_error( error_code ec )
Chris@16:           : std::runtime_error(""), m_error_code(ec) {}
Chris@16: 
Chris@16:       system_error( error_code ec, const std::string & what_arg )
Chris@16:           : std::runtime_error(what_arg), m_error_code(ec) {}
Chris@16: 
Chris@16:       system_error( error_code ec, const char* what_arg )
Chris@16:           : std::runtime_error(what_arg), m_error_code(ec) {}
Chris@16: 
Chris@16:       system_error( int ev, const error_category & ecat )
Chris@16:           : std::runtime_error(""), m_error_code(ev,ecat) {}
Chris@16: 
Chris@16:       system_error( int ev, const error_category & ecat,
Chris@16:         const std::string & what_arg )
Chris@16:           : std::runtime_error(what_arg), m_error_code(ev,ecat) {}
Chris@16: 
Chris@16:       system_error( int ev, const error_category & ecat,
Chris@16:         const char * what_arg )
Chris@16:           : std::runtime_error(what_arg), m_error_code(ev,ecat) {}
Chris@16: 
Chris@16:       virtual ~system_error() throw() {}
Chris@16: 
Chris@16:       const error_code &  code() const throw() { return m_error_code; }
Chris@16:       const char *        what() const throw();
Chris@16: 
Chris@16:     private:
Chris@16:       error_code           m_error_code;
Chris@16:       mutable std::string  m_what;
Chris@16:     };
Chris@16: 
Chris@16:     //  implementation  ------------------------------------------------------//
Chris@16: 
Chris@16:     inline const char * system_error::what() const throw()
Chris@16:     // see http://www.boost.org/more/error_handling.html for lazy build rationale
Chris@16:     {
Chris@16:       if ( m_what.empty() )
Chris@16:       {
Chris@16: #ifndef BOOST_NO_EXCEPTIONS
Chris@16:         try
Chris@16: #endif
Chris@16:         {
Chris@16:           m_what = this->std::runtime_error::what();
Chris@16:           if ( !m_what.empty() ) m_what += ": ";
Chris@16:           m_what += m_error_code.message();
Chris@16:         }
Chris@16: #ifndef BOOST_NO_EXCEPTIONS
Chris@16:         catch (...) { return std::runtime_error::what(); }
Chris@16: #endif
Chris@16:       }
Chris@16:       return m_what.c_str();
Chris@16:     }
Chris@16: 
Chris@16:   } // namespace system
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #endif // BOOST_SYSTEM_ERROR_HPP
Chris@16: 
Chris@16: