exception/detail/error_info_impl.hpp

0001 //Copyright (c) 2006-2010 Emil Dotchevski and Reverge Studios, Inc.
0002
0003 //Distributed under the Boost Software License, Version 1.0. (See accompanying
0004 //file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0005
0006 #ifndef BOOST_EXCEPTION_CE6983AC753411DDA764247956D89593
0007 #define BOOST_EXCEPTION_CE6983AC753411DDA764247956D89593
0008
0009 #include <boost/config.hpp>
0010 #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
0011 #include <boost/type_traits/is_nothrow_move_constructible.hpp>
0012 #endif
0013 #include <utility>
0014 #include <string>
0015
0016 #ifndef BOOST_EXCEPTION_ENABLE_WARNINGS
0017 #if defined(__GNUC__) && __GNUC__*100+__GNUC_MINOR__>301
0018 #pragma GCC system_header
0019 #endif
0020 #ifdef __clang__
0021 #pragma clang system_header
0022 #endif
0023 #ifdef _MSC_VER
0024 #pragma warning(push,1)
0025 #endif
0026 #endif
0027
0028 namespace
0029 boost
0030     {
0031     namespace
0032     exception_detail
0033         {
0034         class
0035         error_info_base
0036             {
0037             public:
0038
0039             virtual std::string name_value_string() const = 0;
0040             virtual error_info_base * clone() const = 0;
0041
0042             virtual
0043             ~error_info_base() BOOST_NOEXCEPT_OR_NOTHROW
0044                 {
0045                 }
0046             };
0047         }
0048
0049     template <class Tag,class T>
0050     class
0051     error_info:
0052         public exception_detail::error_info_base
0053         {
0054         exception_detail::error_info_base *
0055         clone() const
0056             {
0057             return new error_info<Tag,T>(*this);
0058             }
0059         public:
0060         typedef T value_type;
0061         error_info( value_type const & v ):
0062             v_(v)
0063             {
0064             }
0065 #if (__GNUC__*100+__GNUC_MINOR__!=406) //workaround for g++ bug
0066 #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
0067         error_info( error_info const & x ):
0068             v_(x.v_)
0069             {
0070             }
0071         error_info( T && v ) BOOST_NOEXCEPT_IF(boost::is_nothrow_move_constructible<T>::value):
0072             v_(std::move(v))
0073             {
0074             }
0075         error_info( error_info && x ) BOOST_NOEXCEPT_IF(boost::is_nothrow_move_constructible<T>::value):
0076             v_(std::move(x.v_))
0077             {
0078             }
0079 #endif
0080 #endif
0081         ~error_info() BOOST_NOEXCEPT_OR_NOTHROW
0082             {
0083             }
0084         value_type const &
0085         value() const
0086             {
0087             return v_;
0088             }
0089         value_type &
0090         value()
0091             {
0092             return v_;
0093             }
0094         private:
0095         error_info & operator=( error_info const & );
0096 #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
0097         error_info & operator=( error_info && x );
0098 #endif
0099         std::string name_value_string() const;
0100         value_type v_;
0101         };
0102     }
0103
0104 #if defined(_MSC_VER) && !defined(BOOST_EXCEPTION_ENABLE_WARNINGS)
0105 #pragma warning(pop)
0106 #endif
0107 #endif