seq/map.h

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#ifndef GRPPI_SEQ_MAP_H
#define GRPPI_SEQ_MAP_H

#include "sequential_execution.h"

#include "../common/iterator.h"

namespace grppi {

template <typename InputIt, typename OutputIt, typename Transformer>
void map(sequential_execution & ex, 
         InputIt first, InputIt last, OutputIt first_out, 
         Transformer && transf_op) 
{
  while(first != last) {
    *first_out = transf_op(*first);
    first++;
    first_out++;
  }
}

template <typename InputIt, typename OutputIt, typename Transformer,
          typename ... OtherInputIts>
void map(sequential_execution & ex, 
         InputIt first, InputIt last, OutputIt first_out, 
         Transformer && transf_op, 
         OtherInputIts ... other_firsts) 
{
  while( first != last ) {
    *first_out = transf_op(*first, *other_firsts...);
    advance_iterators(other_firsts...);
    first++;
    first_out++;
  }
}

}
#endif