boost exception

[SVN r43485]

include/boost/exception/exception.hpp

@@ -0,0 +1,90 @@
+//Copyright (c) 2006-2008 Emil Dotchevski and Reverge Studios, Inc.
+
+//Distributed under the Boost Software License, Version 1.0. (See accompanying
+//file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef UUID_274DA366004E11DCB1DDFE2E56D89593
+#define UUID_274DA366004E11DCB1DDFE2E56D89593
+
+#include <boost/exception/detail/counted_base.hpp>
+#include <boost/intrusive_ptr.hpp>
+#include <typeinfo>
+
+namespace
+boost
+	{
+	template <class T>
+	class shared_ptr;
+
+	namespace
+	exception_detail
+		{
+		class error_info_base;
+
+		struct
+		error_info_container:
+			public exception_detail::counted_base
+			{
+			virtual char const * what( std::type_info const & ) const = 0;
+			virtual shared_ptr<error_info_base const> get( std::type_info const & ) const = 0;
+			virtual void set( shared_ptr<error_info_base const> const & ) = 0;
+			};
+		}
+
+	template <class Tag,class T>
+	class error_info;
+
+	template <class E,class Tag,class T>
+	E const & operator<<( E const &, error_info<Tag,T> const & );
+
+	template <class ErrorInfo,class E>
+	shared_ptr<typename ErrorInfo::value_type const> get_error_info( E const & );
+
+	class
+	exception
+		{
+		public:
+
+		virtual ~exception() throw()=0;
+		virtual char const * what() const throw();
+
+		private:
+
+		shared_ptr<exception_detail::error_info_base const> get( std::type_info const & ) const;
+		void set( shared_ptr<exception_detail::error_info_base const> const & ) const;
+
+		template <class E,class Tag,class T>
+		friend E const & operator<<( E const &, error_info<Tag,T> const & );
+
+		template <class ErrorInfo,class E>
+		friend shared_ptr<typename ErrorInfo::value_type const> get_error_info( E const & );
+
+		intrusive_ptr<exception_detail::error_info_container> mutable data_;
+		};
+
+	inline
+	exception::
+	~exception() throw()
+		{
+		}
+
+	inline
+	char const *
+	exception::
+	what() const throw()
+		{
+		if( data_ )
+			try
+				{
+				char const * w = data_->what(typeid(*this));
+				BOOST_ASSERT(0!=w);
+				return w;
+				}
+			catch(...)
+				{
+				}
+		return typeid(*this).name();
+		}
+	}
+
+#endif