New type-checking internal function.

[Eduardo]

Hi, while dealing with the  octave_value interface I am missing a function like "is_idx_type()". Imho should look like something like this:

bool is_idx_type(void) const
  {
    #if defined (USE_64_BIT_IDX_T)

     return is_int64_type();

   #else

     return is_integer_type();

   #endif

  }

provided how things are done in the following functions:

 octave_idx_type

octave_value::idx_type_value (bool req_int, bool frc_str_conv) const

{

#if defined (USE_64_BIT_IDX_T)

   return int64_value (req_int, frc_str_conv);

#else

   return int_value (req_int, frc_str_conv);

#endif

bool is_int64_type (void) const

   { return rep->is_int64_type (); }

bool is_integer_type (void) const

   { return rep->is_integer_type (); }

What about including something like that in the octave_value class?