text: 
  /*
   * This header defines a couple of types used by HiOp. 
   * 
   * This header is shared by both C and C++ interfaces of HiOp and this is
   * the only place where these types should/need to be modified.
   */
  
  //
  // int types 
  //
  typedef int hiop_index_type;
  typedef int hiop_size_type;
  #ifdef HIOP_USE_MPI
  #include "mpi.h"
  // MPI_Datatype corresponding to the above types should be specified below
  #define MPI_HIOP_INDEX_TYPE MPI_INT
  #define MPI_HIOP_SIZE_TYPE MPI_INT
  #endif
  
  //
  // Same types as above but in C++
  //
  #ifdef __cplusplus
  namespace hiop
  {
    using index_type = hiop_index_type;
    using size_type  = hiop_size_type;
  }
  #endif
  