source: src/Fragmentation/Summation/Containers/VMGData_printKeyNames.hpp

/*
 * VMGData_printKeyNames.hpp
 *
 *  Created on: 08.08.2012
 *      Author: heber
 */

#ifndef VMGDATA_PRINTKEYNAMES_HPP_
#define VMGDATA_PRINTKEYNAMES_HPP_

// include config.h
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "Fragmentation/Summation/printKeyNames.hpp"

//#include <iosfwd>
#include <string>

#include "Fragmentation/Summation/printKeyNames.hpp"

#include <boost/preprocessor/iteration/local.hpp>
#include <boost/preprocessor/seq/elem.hpp>
#include <boost/preprocessor/seq/seq.hpp>
#include <boost/preprocessor/seq/size.hpp>
#include <boost/preprocessor/stringize.hpp>

/** this is the boost::preprocessor::sequence of the keys in the boost::fusion::map
 *
 * Basically, every key appears here in brackets. If so, then the preprocessor magic
 * below will create a template specialization of the printName() function in the
 * namespace printKeyNames.
 */
#define tokensequence \
        (sampled_potential) \
  (both_sampled_potential) \
  (nuclei_long) \
  (electron_long) \
  (forces) \
  (electron_longrange) \
  (electron_shortrange) \
  (mixed_longrange) \
  (mixed_shortrange) \
  (nuclei_longrange) \
  (nuclei_shortrange) \
  (total_longrange) \
  (total_shortrange) \
  (forces_longrange) \
  (forces_shortrange)

/// we take note of the number of keys in tokensequence as (local) loop bounds below
#ifndef tokensequence
#define MAXTOKENS 0
#else
#define MAXTOKENS BOOST_PP_SEQ_SIZE(tokensequence)
#endif

/** This is the macro function which prints the specialized template function.
 *
 * We need make it inline as it is fully specialized and hence multiple instances
 * are not combined into one anymore.
 */
#define printName_specializer(z, n, NAMESPACE, TOKENSEQ, NAMESEQ ) \
  template<> inline std::string printName< NAMESPACE :: BOOST_PP_SEQ_ELEM( n, TOKENSEQ ) >() { \
    return std::string( BOOST_PP_STRINGIZE( BOOST_PP_SEQ_ELEM( n, NAMESEQ ) ) ); \
  }

/** Specific namespace for all the specialized template functions that print
 * a useful name for each of the boost::fusion::map key.
 */
namespace printKeyNames {
  /* iterate (line-wise) over the sequence and spill out a specialized printName
   * for each member in the boost::fusion::map.
   */
#if defined tokensequence && defined MAXTOKENS && defined printName_specializer
#define BOOST_PP_LOCAL_MACRO(n) printName_specializer(~, n, VMGDataFused, tokensequence, tokensequence)
#define BOOST_PP_LOCAL_LIMITS  (0, MAXTOKENS-1)
#include BOOST_PP_LOCAL_ITERATE()
#endif

}; /* namespace printKeyNames */

#undef tokensequence
#undef printName_specializer

#undef MAXTOKENS

#endif /* VMGDATA_PRINTKEYNAMES_HPP_ */