imgtools/imglib/boostlibrary/boost/exception/exception.hpp
author Ross Qin <ross.qin@nokia.com>
Thu, 28 Oct 2010 11:18:50 +0800
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permissions -rw-r--r--
Remove the PrintingServices component from TB10.1 on wards(on behalf of dane.waby@nokia.com)
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//Copyright (c) 2006-2009 Emil Dotchevski and Reverge Studios, Inc.
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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 UUID_274DA366004E11DCB1DDFE2E56D89593
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#define UUID_274DA366004E11DCB1DDFE2E56D89593
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namespace
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boost
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    {
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    namespace
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    exception_detail
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        {
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        template <class T>
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        class
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        refcount_ptr
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            {
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            public:
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            refcount_ptr():
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                px_(0)
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                {
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                }
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            ~refcount_ptr()
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                {
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                release();
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                }
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            refcount_ptr( refcount_ptr const & x ):
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                px_(x.px_)
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                {
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                add_ref();
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                }
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            refcount_ptr &
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            operator=( refcount_ptr const & x )
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                {
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                adopt(x.px_);
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                return *this;
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                }
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            void
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            adopt( T * px )
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                {
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                release();
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                px_=px;
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                add_ref();
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                }
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            T *
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            get() const
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                {
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                return px_;
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                }
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            private:
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            T * px_;
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            void
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            add_ref()
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                {
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                if( px_ )
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                    px_->add_ref();
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                }
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            void
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            release()
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                {
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                if( px_ )
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                    px_->release();
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                }
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            };
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        }
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    ////////////////////////////////////////////////////////////////////////
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    template <class Tag,class T>
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    class error_info;
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    typedef error_info<struct tag_throw_function,char const *> throw_function;
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    typedef error_info<struct tag_throw_file,char const *> throw_file;
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    typedef error_info<struct tag_throw_line,int> throw_line;
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    template <>
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    class
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    error_info<tag_throw_function,char const *>
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        {
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        public:
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        typedef char const * value_type;
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        value_type v_;
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        explicit
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        error_info( value_type v ):
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            v_(v)
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            {
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            }
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        };
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    template <>
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    class
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    error_info<tag_throw_file,char const *>
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        {
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        public:
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        typedef char const * value_type;
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        value_type v_;
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        explicit
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        error_info( value_type v ):
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            v_(v)
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            {
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            }
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        };
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    template <>
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    class
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    error_info<tag_throw_line,int>
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        {
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        public:
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        typedef int value_type;
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        value_type v_;
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        explicit
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        error_info( value_type v ):
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            v_(v)
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            {
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            }
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        };
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    template <class E,class Tag,class T>
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    E const & operator<<( E const &, error_info<Tag,T> const & );
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    class exception;
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    template <class>
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    class shared_ptr;
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    namespace
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    exception_detail
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        {
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        class error_info_base;
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        struct type_info_;
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        struct
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        error_info_container
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            {
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            virtual char const * diagnostic_information() const = 0;
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            virtual shared_ptr<error_info_base const> get( type_info_ const & ) const = 0;
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            virtual void set( shared_ptr<error_info_base const> const &, type_info_ const & ) = 0;
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            virtual void add_ref() const = 0;
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            virtual void release() const = 0;
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            protected:
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            virtual
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            ~error_info_container() throw()
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                {
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                }
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            };
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        template <class>
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        struct get_info;
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        template <>
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        struct get_info<throw_function>;
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        template <>
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        struct get_info<throw_file>;
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        template <>
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        struct get_info<throw_line>;
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        char const * get_diagnostic_information( exception const & );
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        }
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    class
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    exception
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        {
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        protected:
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        exception():
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            throw_function_(0),
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            throw_file_(0),
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            throw_line_(-1)
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            {
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            }
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#ifdef __HP_aCC
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        //On HP aCC, this protected copy constructor prevents throwing boost::exception.
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        //On all other platforms, the same effect is achieved by the pure virtual destructor.
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        exception( exception const & x ) throw():
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            data_(x.data_),
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            throw_function_(x.throw_function_),
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            throw_file_(x.throw_file_),
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            throw_line_(x.throw_line_)
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            {
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            }
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#endif
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        virtual ~exception() throw()
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#ifndef __HP_aCC
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            = 0 //Workaround for HP aCC, =0 incorrectly leads to link errors.
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#endif
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            ;
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        private:
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        template <class E>
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        friend
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        E const &
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        operator<<( E const & x, throw_function const & y )
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            {
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            x.throw_function_=y.v_;
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            return x;
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            }
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        template <class E>
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        friend
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        E const &
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        operator<<( E const & x, throw_file const & y )
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            {
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            x.throw_file_=y.v_;
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            return x;
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            }
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        template <class E>
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        friend
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        E const &
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        operator<<( E const & x, throw_line const & y )
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            {
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            x.throw_line_=y.v_;
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            return x;
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            }
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        friend char const * exception_detail::get_diagnostic_information( exception const & );
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        template <class E,class Tag,class T>
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        friend E const & operator<<( E const &, error_info<Tag,T> const & );
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        template <class>
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        friend struct exception_detail::get_info;
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        friend struct exception_detail::get_info<throw_function>;
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        friend struct exception_detail::get_info<throw_file>;
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        friend struct exception_detail::get_info<throw_line>;
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        mutable exception_detail::refcount_ptr<exception_detail::error_info_container> data_;
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        mutable char const * throw_function_;
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        mutable char const * throw_file_;
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        mutable int throw_line_;
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        };
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    inline
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    exception::
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    ~exception() throw()
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        {
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        }
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    ////////////////////////////////////////////////////////////////////////
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    namespace
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    exception_detail
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        {
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        template <class T>
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        struct
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        error_info_injector:
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            public T,
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            public exception
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            {
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            explicit
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            error_info_injector( T const & x ):
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                T(x)
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                {
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                }
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            ~error_info_injector() throw()
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                {
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                }
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            };
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        struct large_size { char c[256]; };
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        large_size dispatch( exception * );
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        struct small_size { };
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        small_size dispatch( void * );
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        template <class,int>
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        struct enable_error_info_helper;
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        template <class T>
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        struct
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        enable_error_info_helper<T,sizeof(large_size)>
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            {
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            typedef T type;
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            };
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        template <class T>
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        struct
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        enable_error_info_helper<T,sizeof(small_size)>
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            {
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            typedef error_info_injector<T> type;
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            };
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        template <class T>
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        struct
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        enable_error_info_return_type
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            {
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            typedef typename enable_error_info_helper<T,sizeof(dispatch((T*)0))>::type type;
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            };
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        }
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    template <class T>
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    inline
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    typename
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    exception_detail::enable_error_info_return_type<T>::type
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    enable_error_info( T const & x )
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        {
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        typedef typename exception_detail::enable_error_info_return_type<T>::type rt;
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        return rt(x);
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        }
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    ////////////////////////////////////////////////////////////////////////
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    namespace
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    exception_detail
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        {
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        class
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        clone_base
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            {
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            public:
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            virtual clone_base const * clone() const = 0;
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            virtual void rethrow() const = 0;
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            virtual
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            ~clone_base() throw()
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                {
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                }
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            };
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        inline
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        void
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        copy_boost_exception( exception * a, exception const * b )
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            {
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            *a = *b;
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            }
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        inline
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        void
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        copy_boost_exception( void *, void const * )
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            {
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            }
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        template <class T>
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        class
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        clone_impl:
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            public T,
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            public clone_base
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            {
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            public:
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            explicit
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            clone_impl( T const & x ):
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                T(x)
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                {
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                copy_boost_exception(this,&x);
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                }
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            ~clone_impl() throw()
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                {
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                }
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            private:
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            clone_base const *
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            clone() const
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                {
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                return new clone_impl(*this);
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                }
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            void
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            rethrow() const
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                {
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                throw*this;
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                }
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            };
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        }
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    template <class T>
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    inline
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    exception_detail::clone_impl<T>
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    enable_current_exception( T const & x )
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        {
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        return exception_detail::clone_impl<T>(x);
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        }
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    }
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#endif