JVectorize.cc

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#include <iostream>
#include <iomanip>
#include <vector>

#include "JLang/JVectorize.hh"

#include "Jeep/JParser.hh"
#include "Jeep/JMessage.hh"


namespace {

  struct __A__ 
  {
    __A__() :
      i(0)
    {}

    __A__(const int __i) :
      i(__i)
    {}

    int get() const { return i; }

    friend inline std::ostream& operator<<(std::ostream& out, const __A__& object)
    {
      return out << object.i;
    }

    int i;
  };
  
  
  /**
   * Print data.
   *
   * \param  out        output stream
   * \param  N          number of elements
   * \param  p          pointer to data
   */
  template<class T>
  inline void print(std::ostream& out, int N, T* p)
  {
    using namespace std;

    for (int i = 0; i != N; ++i) {
      out << ' ' << setw(2) << p[i];
    }

    cout << endl;
  }
}


/**
 * \file
 *
 * Example program to test JLANG::make_array method.
 * \author mdejong
 */
int main(int argc, char **argv)
{
  using namespace std;

  int         debug;

  try {

    JParser<> zap("Example program to test converions of array of objects to array of data members.");

    zap['d'] = make_field(debug)            = 3;

    zap(argc, argv);
  }
  catch(const exception &error) {
    FATAL(error.what() << endl);
  }


  using namespace JPP;

  vector<__A__> buffer;

  int numberOfElements = 5;

  for (int i = 0; i != numberOfElements; ++i) {
    buffer.push_back(__A__(i));
  }

  if (debug >= debug_t) {
    print(cout, numberOfElements, buffer.data());
    print(cout, numberOfElements, make_array(buffer.begin(), buffer.end(), &__A__::get).data());
    print(cout, numberOfElements, make_array(buffer.begin(), buffer.end(), &__A__::i)  .data());
  }

  {
    const int* p = make_array(buffer.begin(), buffer.end(), &__A__::get).data();

    for (int i = 0; i != numberOfElements; ++i, ++p) {
      ASSERT(buffer[i].get() == *p);
    }
  }

  {
    const int* p = make_array(buffer.begin(), buffer.end(), &__A__::i).data();

    for (int i = 0; i != numberOfElements; ++i, ++p) {
      ASSERT(buffer[i].i == *p);
    }
  }

  return 0;
}