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7.23.2.2 Assorted Object Functions

• - integer ‘__count’(object o);

  is the number of parameters of the function referred by o

• - integer ‘__fid’(object o);

  is the type ID of the function referred by o

• - text ‘__ftype’(object o);

  is the type name of the function referred by o

• - text ‘__function’(object o);

  is the name of the function referred by o

  See Function Pointers.

• - object ‘__hold’(integer c, object o, object r);

  is o if c is not zero, r otherwise

• - integer ‘__id’(object o);

  is the type ID describing data boxed by o

• - integer ‘__pid’(object o, integer i);

  is the type ID of the i indexed parameter of the function referred by o (negative position indications are interpreted with respect to the end of parameters list)

• - text ‘__ptype’(object o, integer i);

  is the type name of the i indexed parameter of the function referred by o (negative position indications are interpreted with respect to the end of parameters list)

• - integer ‘__referable’(object o);

  is non zero if the type of data boxed by o allows multiple data references, zero otherwise

  See Referable Objects.

• - text ‘__type’(object o);

  is the type name describing data boxed by o