anchor.diff:    !---------------------------------------------------------------------------------------------------------------------------------
     endfunction str_I1P
   
  -  !> @brief Procedure for converting integer to string, prefixing with the right number of zeros. This function achieves casting of
  -  !> integer to string.
     elemental function strz_I8P(nz_pad,n) result(str)
  +  !---------------------------------------------------------------------------------------------------------------------------------
  +  !< Procedure for converting integer to string, prefixing with the right number of zeros. This function achieves casting of
  +  !< integer to string.
     !---------------------------------------------------------------------------------------------------------------------------------
     implicit none
     integer(I4P), intent(IN), optional:: nz_pad !< Number of zeros padding.
  
positive.code:   !---------------------------------------------------------------------------------------------------------------------------------
    endfunction strf_I1P
  
    !> @brief Procedure for converting real to string. This function achieves casting of real to string.
    elemental function str_R16P(no_sign,n) result(str)
    !---------------------------------------------------------------------------------------------------------------------------------
    implicit none
    logical,    intent(IN), optional:: no_sign !< Flag for leaving out the sign.
  
negative.code:   !---------------------------------------------------------------------------------------------------------------------------------
    endfunction byte_size_I8P
  
    elemental function byte_size_I4P(i) result(bytes)
    !---------------------------------------------------------------------------------------------------------------------------------
    !< Procedure for computing the number of bytes of an integer variable.
    !---------------------------------------------------------------------------------------------------------------------------------
    implicit none
    integer(I4P), intent(IN):: i     !< Integer variable whose number of bytes must be computed.
  