570 lines
14 KiB
C++
570 lines
14 KiB
C++
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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 BOOST_EXCEPTION_274DA366004E11DCB1DDFE2E56D89593
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#define BOOST_EXCEPTION_274DA366004E11DCB1DDFE2E56D89593
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#include <boost/assert/source_location.hpp>
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#include <boost/config.hpp>
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#include <exception>
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#ifdef BOOST_EXCEPTION_MINI_BOOST
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#include <memory>
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namespace boost { namespace exception_detail { using std::shared_ptr; } }
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#else
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namespace boost { template <class T> class shared_ptr; }
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namespace boost { namespace exception_detail { using boost::shared_ptr; } }
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#endif
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#if !defined(BOOST_EXCEPTION_ENABLE_WARNINGS)
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#if __GNUC__*100+__GNUC_MINOR__>301
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#pragma GCC system_header
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#endif
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#ifdef __clang__
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#pragma clang system_header
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#endif
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#ifdef _MSC_VER
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#pragma warning(push,1)
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#pragma warning(disable: 4265)
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#endif
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#endif
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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_ && px_->release() )
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px_=0;
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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 throw_function_,char const *> throw_function;
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typedef error_info<struct throw_file_,char const *> throw_file;
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typedef error_info<struct throw_line_,int> throw_line;
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typedef error_info<struct throw_column_,int> throw_column;
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template <>
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class
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error_info<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<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<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 <>
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class
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error_info<throw_column_,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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class
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BOOST_SYMBOL_VISIBLE
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exception;
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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( char const * ) const = 0;
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virtual shared_ptr<error_info_base> get( type_info_ const & ) const = 0;
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virtual void set( shared_ptr<error_info_base> const &, type_info_ const & ) = 0;
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virtual void add_ref() const = 0;
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virtual bool release() const = 0;
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virtual refcount_ptr<exception_detail::error_info_container> clone() const = 0;
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protected:
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~error_info_container() BOOST_NOEXCEPT_OR_NOTHROW
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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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template <>
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struct get_info<throw_column>;
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template <class>
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struct set_info_rv;
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template <>
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struct set_info_rv<throw_function>;
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template <>
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struct set_info_rv<throw_file>;
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template <>
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struct set_info_rv<throw_line>;
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template <>
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struct set_info_rv<throw_column>;
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char const * get_diagnostic_information( exception const &, char const * );
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void copy_boost_exception( exception *, exception const * );
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template <class E,class Tag,class T>
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E const & set_info( E const &, error_info<Tag,T> const & );
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template <class E>
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E const & set_info( E const &, throw_function const & );
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template <class E>
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E const & set_info( E const &, throw_file const & );
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template <class E>
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E const & set_info( E const &, throw_line const & );
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template <class E>
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E const & set_info( E const &, throw_column const & );
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boost::source_location get_exception_throw_location( exception const & );
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}
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class
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BOOST_SYMBOL_VISIBLE
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exception
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{
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//<N3757>
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public:
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template <class Tag> void set( typename Tag::type const & );
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template <class Tag> typename Tag::type const * get() const;
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//</N3757>
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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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throw_column_(-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 ) BOOST_NOEXCEPT_OR_NOTHROW:
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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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throw_column_(x.throw_column_)
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{
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}
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#endif
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virtual ~exception() BOOST_NOEXCEPT_OR_NOTHROW
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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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#if (defined(__MWERKS__) && __MWERKS__<=0x3207) || (defined(_MSC_VER) && _MSC_VER<=1310)
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public:
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#else
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private:
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template <class E>
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friend E const & exception_detail::set_info( E const &, throw_function const & );
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template <class E>
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friend E const & exception_detail::set_info( E const &, throw_file const & );
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template <class E>
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friend E const & exception_detail::set_info( E const &, throw_line const & );
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template <class E>
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friend E const & exception_detail::set_info( E const &, throw_column const & );
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template <class E,class Tag,class T>
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friend E const & exception_detail::set_info( E const &, error_info<Tag,T> const & );
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friend char const * exception_detail::get_diagnostic_information( exception const &, char const * );
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friend boost::source_location exception_detail::get_exception_throw_location( exception 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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friend struct exception_detail::get_info<throw_column>;
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template <class>
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friend struct exception_detail::set_info_rv;
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friend struct exception_detail::set_info_rv<throw_function>;
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friend struct exception_detail::set_info_rv<throw_file>;
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friend struct exception_detail::set_info_rv<throw_line>;
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friend struct exception_detail::set_info_rv<throw_column>;
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friend void exception_detail::copy_boost_exception( exception *, exception const * );
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#endif
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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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mutable int throw_column_;
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};
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inline
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exception::
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~exception() BOOST_NOEXCEPT_OR_NOTHROW
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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 E>
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E const &
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set_info( 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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E const &
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set_info( 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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E const &
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set_info( 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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template <class E>
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E const &
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set_info( E const & x, throw_column const & y )
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{
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x.throw_column_=y.v_;
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return x;
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}
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#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
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template <>
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struct
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set_info_rv<throw_column>
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{
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template <class E>
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static
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E const &
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set( E const & x, throw_column && y )
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{
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x.throw_column_=y.v_;
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return x;
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}
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};
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#endif
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inline boost::source_location get_exception_throw_location( exception const & x )
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{
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return boost::source_location(
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x.throw_file_? x.throw_file_: "",
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x.throw_line_ >= 0? x.throw_line_: 0,
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x.throw_function_? x.throw_function_: "",
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x.throw_column_ >= 0? x.throw_column_: 0
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);
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}
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}
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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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BOOST_SYMBOL_VISIBLE
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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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|
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T(x)
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{
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}
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~error_info_injector() BOOST_NOEXCEPT_OR_NOTHROW
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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_boost_exception( exception const * );
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|
struct small_size { };
|
||
|
|
small_size dispatch_boost_exception( void const * );
|
||
|
|
|
||
|
|
template <class,int>
|
||
|
|
struct enable_error_info_helper;
|
||
|
|
|
||
|
|
template <class T>
|
||
|
|
struct
|
||
|
|
enable_error_info_helper<T,sizeof(large_size)>
|
||
|
|
{
|
||
|
|
typedef T type;
|
||
|
|
};
|
||
|
|
|
||
|
|
template <class T>
|
||
|
|
struct
|
||
|
|
enable_error_info_helper<T,sizeof(small_size)>
|
||
|
|
{
|
||
|
|
typedef error_info_injector<T> type;
|
||
|
|
};
|
||
|
|
|
||
|
|
template <class T>
|
||
|
|
struct
|
||
|
|
enable_error_info_return_type
|
||
|
|
{
|
||
|
|
typedef typename enable_error_info_helper<T,sizeof(exception_detail::dispatch_boost_exception(static_cast<T *>(0)))>::type type;
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
template <class T>
|
||
|
|
inline
|
||
|
|
typename
|
||
|
|
exception_detail::enable_error_info_return_type<T>::type
|
||
|
|
enable_error_info( T const & x )
|
||
|
|
{
|
||
|
|
typedef typename exception_detail::enable_error_info_return_type<T>::type rt;
|
||
|
|
return rt(x);
|
||
|
|
}
|
||
|
|
|
||
|
|
////////////////////////////////////////////////////////////////////////
|
||
|
|
#if defined(BOOST_NO_EXCEPTIONS)
|
||
|
|
BOOST_NORETURN void throw_exception(std::exception const & e); // user defined
|
||
|
|
#endif
|
||
|
|
|
||
|
|
namespace
|
||
|
|
exception_detail
|
||
|
|
{
|
||
|
|
class
|
||
|
|
BOOST_SYMBOL_VISIBLE
|
||
|
|
clone_base
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
|
||
|
|
virtual clone_base const * clone() const = 0;
|
||
|
|
virtual void rethrow() const = 0;
|
||
|
|
|
||
|
|
virtual
|
||
|
|
~clone_base() BOOST_NOEXCEPT_OR_NOTHROW
|
||
|
|
{
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
inline
|
||
|
|
void
|
||
|
|
copy_boost_exception( exception * a, exception const * b )
|
||
|
|
{
|
||
|
|
refcount_ptr<error_info_container> data;
|
||
|
|
if( error_info_container * d=b->data_.get() )
|
||
|
|
data = d->clone();
|
||
|
|
a->throw_file_ = b->throw_file_;
|
||
|
|
a->throw_line_ = b->throw_line_;
|
||
|
|
a->throw_function_ = b->throw_function_;
|
||
|
|
a->throw_column_ = b->throw_column_;
|
||
|
|
a->data_ = data;
|
||
|
|
}
|
||
|
|
|
||
|
|
inline
|
||
|
|
void
|
||
|
|
copy_boost_exception( void *, void const * )
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
template <class T>
|
||
|
|
class
|
||
|
|
BOOST_SYMBOL_VISIBLE
|
||
|
|
clone_impl:
|
||
|
|
public T,
|
||
|
|
public virtual clone_base
|
||
|
|
{
|
||
|
|
struct clone_tag { };
|
||
|
|
clone_impl( clone_impl const & x, clone_tag ):
|
||
|
|
T(x)
|
||
|
|
{
|
||
|
|
copy_boost_exception(this,&x);
|
||
|
|
}
|
||
|
|
|
||
|
|
public:
|
||
|
|
|
||
|
|
explicit
|
||
|
|
clone_impl( T const & x ):
|
||
|
|
T(x)
|
||
|
|
{
|
||
|
|
copy_boost_exception(this,&x);
|
||
|
|
}
|
||
|
|
|
||
|
|
~clone_impl() BOOST_NOEXCEPT_OR_NOTHROW
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
private:
|
||
|
|
|
||
|
|
clone_base const *
|
||
|
|
clone() const
|
||
|
|
{
|
||
|
|
return new clone_impl(*this,clone_tag());
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|
||
|
|
rethrow() const
|
||
|
|
{
|
||
|
|
#if defined(BOOST_NO_EXCEPTIONS)
|
||
|
|
boost::throw_exception(*this);
|
||
|
|
#else
|
||
|
|
throw*this;
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
template <class T>
|
||
|
|
inline
|
||
|
|
exception_detail::clone_impl<T>
|
||
|
|
enable_current_exception( T const & x )
|
||
|
|
{
|
||
|
|
return exception_detail::clone_impl<T>(x);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#if defined(_MSC_VER) && !defined(BOOST_EXCEPTION_ENABLE_WARNINGS)
|
||
|
|
#pragma warning(pop)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif // #ifndef BOOST_EXCEPTION_274DA366004E11DCB1DDFE2E56D89593
|