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#ifndef BOOST_SIMPLE_LOG_ARCHIVE_HPP
#define BOOST_SIMPLE_LOG_ARCHIVE_HPP
// MS compatible compilers support #pragma once
#if defined(_MSC_VER)
# pragma once
#endif
/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
// simple_log_archive.hpp
// (C) Copyright 2010 Robert Ramey - http://www.rrsd.com .
// Use, modification and distribution is subject to 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)
// See http://www.boost.org for updates, documentation, and revision history.
#include <ostream>
#include <cstddef> // std::size_t
#include <boost/config.hpp>
#if defined(BOOST_NO_STDC_NAMESPACE)
namespace std{
using ::size_t;
} // namespace std
#endif
#include <boost/type_traits/is_enum.hpp>
#include <boost/mpl/bool.hpp>
#include <boost/mpl/eval_if.hpp>
#include <boost/mpl/int.hpp>
#include <boost/mpl/equal_to.hpp>
#include <boost/serialization/nvp.hpp>
#include <boost/serialization/array.hpp>
#include <boost/serialization/string.hpp>
#include <boost/serialization/access.hpp>
/////////////////////////////////////////////////////////////////////////
// log data to an output stream. This illustrates a simpler implemenation
// of text output which is useful for getting a formatted display of
// any serializable class. Intended to be useful as a debugging aid.
class simple_log_archive {
std::ostream & m_os;
unsigned int m_depth;
template<class Archive>
struct save_enum_type {
template<class T>
static void invoke(Archive &ar, const T &t){
ar.m_os << static_cast<int>(t);
}
};
template<class Archive>
struct save_primitive {
template<class T>
static void invoke(Archive & ar, const T & t){
ar.m_os << t;
}
};
template<class Archive>
struct save_only {
template<class T>
static void invoke(Archive & ar, const T & t){
// make sure call is routed through the highest interface that might
// be specialized by the user.
boost::serialization::serialize_adl(
ar,
const_cast<T &>(t),
::boost::serialization::version< T >::value
);
}
};
template<class T>
void save(const T &t){
typedef
BOOST_DEDUCED_TYPENAME boost::mpl::eval_if<boost::is_enum< T >,
boost::mpl::identity<save_enum_type<simple_log_archive> >,
//else
BOOST_DEDUCED_TYPENAME boost::mpl::eval_if<
// if its primitive
boost::mpl::equal_to<
boost::serialization::implementation_level< T >,
boost::mpl::int_<boost::serialization::primitive_type>
>,
boost::mpl::identity<save_primitive<simple_log_archive> >,
// else
boost::mpl::identity<save_only<simple_log_archive> >
> >::type typex;
typex::invoke(*this, t);
}
#ifndef BOOST_NO_STD_WSTRING
void save(const std::wstring &ws){
m_os << "wide string types not suported in log archive";
}
#endif
public:
///////////////////////////////////////////////////
// Implement requirements for archive concept
typedef boost::mpl::bool_<false> is_loading;
typedef boost::mpl::bool_<true> is_saving;
// this can be a no-op since we ignore pointer polymorphism
template<class T>
void register_type(const T * = NULL){}
unsigned int get_library_version(){
return 0;
}
void
save_binary(const void *address, std::size_t count){
m_os << "save_binary not implemented";
}
// the << operators
template<class T>
simple_log_archive & operator<<(T const & t){
m_os << ' ';
save(t);
return * this;
}
template<class T>
simple_log_archive & operator<<(T * const t){
m_os << " ->";
if(NULL == t)
m_os << " null";
else
*this << * t;
return * this;
}
template<class T, int N>
simple_log_archive & operator<<(const T (&t)[N]){
return *this << boost::serialization::make_array(
static_cast<const T *>(&t[0]),
N
);
}
template<class T>
simple_log_archive & operator<<(const boost::serialization::nvp< T > & t){
m_os << '\n'; // start line with each named object
// indent according to object depth
for(unsigned int i = 0; i < m_depth; ++i)
m_os << ' ';
++m_depth;
m_os << t.name(); // output the name of the object
* this << t.const_value();
--m_depth;
return * this;
}
// the & operator
template<class T>
simple_log_archive & operator&(const T & t){
return * this << t;
}
///////////////////////////////////////////////
simple_log_archive(std::ostream & os) :
m_os(os),
m_depth(0)
{}
};
#endif // BOOST_SIMPLE_LOG_ARCHIVE_HPP
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