ext-boost/boost/exception/exception.hpp
2019-08-24 15:39:04 +02:00

526 lines
13 KiB
C++

//Copyright (c) 2006-2009 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/config.hpp>
#ifdef BOOST_EXCEPTION_MINI_BOOST
#include <memory>
namespace boost { namespace exception_detail { using std::shared_ptr; } }
#else
namespace boost { template <class T> class shared_ptr; }
namespace boost { namespace exception_detail { using boost::shared_ptr; } }
#endif
#if defined(__GNUC__) && (__GNUC__*100+__GNUC_MINOR__>301) && !defined(BOOST_EXCEPTION_ENABLE_WARNINGS)
#pragma GCC system_header
#endif
#if defined(_MSC_VER) && !defined(BOOST_EXCEPTION_ENABLE_WARNINGS)
#pragma warning(push,1)
#endif
namespace
boost
{
namespace
exception_detail
{
template <class T>
class
refcount_ptr
{
public:
refcount_ptr():
px_(0)
{
}
~refcount_ptr()
{
release();
}
refcount_ptr( refcount_ptr const & x ):
px_(x.px_)
{
add_ref();
}
refcount_ptr &
operator=( refcount_ptr const & x )
{
adopt(x.px_);
return *this;
}
void
adopt( T * px )
{
release();
px_=px;
add_ref();
}
T *
get() const
{
return px_;
}
private:
T * px_;
void
add_ref()
{
if( px_ )
px_->add_ref();
}
void
release()
{
if( px_ && px_->release() )
px_=0;
}
};
}
////////////////////////////////////////////////////////////////////////
template <class Tag,class T>
class error_info;
typedef error_info<struct throw_function_,char const *> throw_function;
typedef error_info<struct throw_file_,char const *> throw_file;
typedef error_info<struct throw_line_,int> throw_line;
template <>
class
error_info<throw_function_,char const *>
{
public:
typedef char const * value_type;
value_type v_;
explicit
error_info( value_type v ):
v_(v)
{
}
};
template <>
class
error_info<throw_file_,char const *>
{
public:
typedef char const * value_type;
value_type v_;
explicit
error_info( value_type v ):
v_(v)
{
}
};
template <>
class
error_info<throw_line_,int>
{
public:
typedef int value_type;
value_type v_;
explicit
error_info( value_type v ):
v_(v)
{
}
};
class
BOOST_SYMBOL_VISIBLE
exception;
namespace
exception_detail
{
class error_info_base;
struct type_info_;
struct
error_info_container
{
virtual char const * diagnostic_information( char const * ) const = 0;
virtual shared_ptr<error_info_base> get( type_info_ const & ) const = 0;
virtual void set( shared_ptr<error_info_base> const &, type_info_ const & ) = 0;
virtual void add_ref() const = 0;
virtual bool release() const = 0;
virtual refcount_ptr<exception_detail::error_info_container> clone() const = 0;
protected:
~error_info_container() BOOST_NOEXCEPT_OR_NOTHROW
{
}
};
template <class>
struct get_info;
template <>
struct get_info<throw_function>;
template <>
struct get_info<throw_file>;
template <>
struct get_info<throw_line>;
template <class>
struct set_info_rv;
template <>
struct set_info_rv<throw_function>;
template <>
struct set_info_rv<throw_file>;
template <>
struct set_info_rv<throw_line>;
char const * get_diagnostic_information( exception const &, char const * );
void copy_boost_exception( exception *, exception const * );
template <class E,class Tag,class T>
E const & set_info( E const &, error_info<Tag,T> const & );
template <class E>
E const & set_info( E const &, throw_function const & );
template <class E>
E const & set_info( E const &, throw_file const & );
template <class E>
E const & set_info( E const &, throw_line const & );
}
class
BOOST_SYMBOL_VISIBLE
exception
{
//<N3757>
public:
template <class Tag> void set( typename Tag::type const & );
template <class Tag> typename Tag::type const * get() const;
//</N3757>
protected:
exception():
throw_function_(0),
throw_file_(0),
throw_line_(-1)
{
}
#ifdef __HP_aCC
//On HP aCC, this protected copy constructor prevents throwing boost::exception.
//On all other platforms, the same effect is achieved by the pure virtual destructor.
exception( exception const & x ) BOOST_NOEXCEPT_OR_NOTHROW:
data_(x.data_),
throw_function_(x.throw_function_),
throw_file_(x.throw_file_),
throw_line_(x.throw_line_)
{
}
#endif
virtual ~exception() BOOST_NOEXCEPT_OR_NOTHROW
#ifndef __HP_aCC
= 0 //Workaround for HP aCC, =0 incorrectly leads to link errors.
#endif
;
#if (defined(__MWERKS__) && __MWERKS__<=0x3207) || (defined(_MSC_VER) && _MSC_VER<=1310)
public:
#else
private:
template <class E>
friend E const & exception_detail::set_info( E const &, throw_function const & );
template <class E>
friend E const & exception_detail::set_info( E const &, throw_file const & );
template <class E>
friend E const & exception_detail::set_info( E const &, throw_line const & );
template <class E,class Tag,class T>
friend E const & exception_detail::set_info( E const &, error_info<Tag,T> const & );
friend char const * exception_detail::get_diagnostic_information( exception const &, char const * );
template <class>
friend struct exception_detail::get_info;
friend struct exception_detail::get_info<throw_function>;
friend struct exception_detail::get_info<throw_file>;
friend struct exception_detail::get_info<throw_line>;
template <class>
friend struct exception_detail::set_info_rv;
friend struct exception_detail::set_info_rv<throw_function>;
friend struct exception_detail::set_info_rv<throw_file>;
friend struct exception_detail::set_info_rv<throw_line>;
friend void exception_detail::copy_boost_exception( exception *, exception const * );
#endif
mutable exception_detail::refcount_ptr<exception_detail::error_info_container> data_;
mutable char const * throw_function_;
mutable char const * throw_file_;
mutable int throw_line_;
};
inline
exception::
~exception() BOOST_NOEXCEPT_OR_NOTHROW
{
}
namespace
exception_detail
{
template <class E>
E const &
set_info( E const & x, throw_function const & y )
{
x.throw_function_=y.v_;
return x;
}
template <class E>
E const &
set_info( E const & x, throw_file const & y )
{
x.throw_file_=y.v_;
return x;
}
template <class E>
E const &
set_info( E const & x, throw_line const & y )
{
x.throw_line_=y.v_;
return x;
}
}
////////////////////////////////////////////////////////////////////////
namespace
exception_detail
{
template <class T>
struct
BOOST_SYMBOL_VISIBLE
error_info_injector:
public T,
public exception
{
explicit
error_info_injector( T const & x ):
T(x)
{
}
~error_info_injector() BOOST_NOEXCEPT_OR_NOTHROW
{
}
};
struct large_size { char c[256]; };
large_size dispatch_boost_exception( exception const * );
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);
}
////////////////////////////////////////////////////////////////////////
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->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
{
throw*this;
}
};
}
template <class T>
inline
exception_detail::clone_impl<T>
enable_current_exception( T const & x )
{
return exception_detail::clone_impl<T>(x);
}
template <class T>
struct
BOOST_SYMBOL_VISIBLE
wrapexcept:
public exception_detail::clone_impl<typename exception_detail::enable_error_info_return_type<T>::type>
{
typedef exception_detail::clone_impl<typename exception_detail::enable_error_info_return_type<T>::type> base_type;
public:
explicit
wrapexcept( typename exception_detail::enable_error_info_return_type<T>::type const & x ):
base_type( x )
{
}
~wrapexcept() BOOST_NOEXCEPT_OR_NOTHROW
{
}
};
namespace
exception_detail
{
template <class T>
struct
remove_error_info_injector
{
typedef T type;
};
template <class T>
struct
remove_error_info_injector< error_info_injector<T> >
{
typedef T type;
};
template <class T>
inline
wrapexcept<typename remove_error_info_injector<T>::type>
enable_both( T const & x )
{
return wrapexcept<typename remove_error_info_injector<T>::type>( enable_error_info( x ) );
}
}
}
#if defined(_MSC_VER) && !defined(BOOST_EXCEPTION_ENABLE_WARNINGS)
#pragma warning(pop)
#endif
#endif