boost/exception/info.hpp
//Copyright (c) 2006-2010 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 BOOST_EXCEPTION_8D22C4CA9CC811DCAA9133D256D89593 #define BOOST_EXCEPTION_8D22C4CA9CC811DCAA9133D256D89593 #include <boost/config.hpp> #include <boost/exception/exception.hpp> #include <boost/exception/to_string_stub.hpp> #include <boost/exception/detail/error_info_impl.hpp> #include <boost/exception/detail/shared_ptr.hpp> #include <map> #ifndef BOOST_EXCEPTION_ENABLE_WARNINGS #if defined(__GNUC__) && __GNUC__*100+__GNUC_MINOR__>301 #pragma GCC system_header #endif #ifdef __clang__ #pragma clang system_header #endif #ifdef _MSC_VER #pragma warning(push,1) #endif #endif namespace boost { template <class Tag,class T> inline std::string error_info_name( error_info<Tag,T> const & ) { return tag_type_name<Tag>(); } template <class Tag,class T> inline std::string to_string( error_info<Tag,T> const & x ) { return '[' + error_info_name(x) + "] = " + to_string_stub(x.value()) + '\n'; } template <class Tag,class T> inline std::string error_info<Tag,T>:: name_value_string() const { return to_string_stub(*this); } namespace exception_detail { class error_info_container_impl BOOST_FINAL: public error_info_container { public: error_info_container_impl(): count_(0) { } ~error_info_container_impl() BOOST_NOEXCEPT_OR_NOTHROW { } void set( shared_ptr<error_info_base> const & x, type_info_ const & typeid_ ) { BOOST_ASSERT(x); info_[typeid_] = x; diagnostic_info_str_.clear(); } shared_ptr<error_info_base> get( type_info_ const & ti ) const { error_info_map::const_iterator i=info_.find(ti); if( info_.end()!=i ) { shared_ptr<error_info_base> const & p = i->second; return p; } return shared_ptr<error_info_base>(); } char const * diagnostic_information( char const * header ) const { if( header ) { std::ostringstream tmp; tmp << header; for( error_info_map::const_iterator i=info_.begin(),end=info_.end(); i!=end; ++i ) { error_info_base const & x = *i->second; tmp << x.name_value_string(); } tmp.str().swap(diagnostic_info_str_); } return diagnostic_info_str_.c_str(); } private: friend class boost::exception; typedef std::map< type_info_, shared_ptr<error_info_base> > error_info_map; error_info_map info_; mutable std::string diagnostic_info_str_; mutable int count_; error_info_container_impl( error_info_container_impl const & ); error_info_container_impl & operator=( error_info_container const & ); void add_ref() const { ++count_; } bool release() const { if( --count_ ) return false; else { delete this; return true; } } refcount_ptr<error_info_container> clone() const { refcount_ptr<error_info_container> p; error_info_container_impl * c=new error_info_container_impl; p.adopt(c); for( error_info_map::const_iterator i=info_.begin(),e=info_.end(); i!=e; ++i ) { shared_ptr<error_info_base> cp(i->second->clone()); c->info_.insert(std::make_pair(i->first,cp)); } return p; } }; template <class E,class Tag,class T> inline E const & set_info( E const & x, error_info<Tag,T> const & v ) { typedef error_info<Tag,T> error_info_tag_t; shared_ptr<error_info_tag_t> p( new error_info_tag_t(v) ); exception_detail::error_info_container * c=x.data_.get(); if( !c ) x.data_.adopt(c=new exception_detail::error_info_container_impl); c->set(p,BOOST_EXCEPTION_STATIC_TYPEID(error_info_tag_t)); return x; } #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES template <class E,class Tag,class T> E const & set_info( E const &, error_info<Tag,T> && ); template <class T> struct set_info_rv; template <class Tag,class T> struct set_info_rv<error_info<Tag,T> > { template <class E,class Tag1,class T1> friend E const & set_info( E const &, error_info<Tag1,T1> && ); template <class E> static E const & set( E const & x, error_info<Tag,T> && v ) { typedef error_info<Tag,T> error_info_tag_t; shared_ptr<error_info_tag_t> p( new error_info_tag_t(std::move(v)) ); exception_detail::error_info_container * c=x.data_.get(); if( !c ) x.data_.adopt(c=new exception_detail::error_info_container_impl); c->set(p,BOOST_EXCEPTION_STATIC_TYPEID(error_info_tag_t)); return x; } }; template <> struct set_info_rv<throw_function> { template <class E,class Tag1,class T1> friend E const & set_info( E const &, error_info<Tag1,T1> && ); template <class E> static E const & set( E const & x, throw_function && y ) { x.throw_function_=y.v_; return x; } }; template <> struct set_info_rv<throw_file> { template <class E,class Tag1,class T1> friend E const & set_info( E const &, error_info<Tag1,T1> && ); template <class E> static E const & set( E const & x, throw_file && y ) { x.throw_file_=y.v_; return x; } }; template <> struct set_info_rv<throw_line> { template <class E,class Tag1,class T1> friend E const & set_info( E const &, error_info<Tag1,T1> && ); template <class E> static E const & set( E const & x, throw_line && y ) { x.throw_line_=y.v_; return x; } }; template <class E,class Tag,class T> inline E const & set_info( E const & x, error_info<Tag,T> && v ) { return set_info_rv<error_info<Tag,T> >::template set<E>(x,std::move(v)); } #endif template <class T> struct derives_boost_exception { enum e { value = (sizeof(dispatch_boost_exception((T*)0))==sizeof(large_size)) }; }; } template <class E,class Tag,class T> inline typename enable_if<exception_detail::derives_boost_exception<E>,E const &>::type operator<<( E const & x, error_info<Tag,T> const & v ) { return exception_detail::set_info(x,v); } #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES template <class E,class Tag,class T> inline typename enable_if<exception_detail::derives_boost_exception<E>,E const &>::type operator<<( E const & x, error_info<Tag,T> && v ) { return exception_detail::set_info(x,std::move(v)); } #endif } #if defined(_MSC_VER) && !defined(BOOST_EXCEPTION_ENABLE_WARNINGS) #pragma warning(pop) #endif #endif