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