(scm_class_keyword): Removed. (Class is automatically created by
make_smob_classes.)
(scm_smob_class): Array of smob classes indexed by smobnum.
(scm_make_extended_class): "Plugin" function pointer for creation
of wrapper classes for smob and struct types.
(scm_class_of): Handle compiled closures. (Currently regarded as
<procedure>.);
Use scm_smob_class to handle smob types;
Handle scm_tc16_bigpos, scm_tc16_bigneg, and, scm_tc16_keyword
through scm_smob_class;
Handle structs.
* Makefile.am, init.c, libguile.h, objects.c, root.h: Replaced
"kw" --> "keywords" everywhere.
(I doubt that this will cause big compatibility problems since the
application interface is unaffected.)
make_class_object; exported; error checking moved to
scm_make_class_object and scm_make_subclass_object.
(scm_make_class_object, scm_make_subclass_object): Use
scm_i_make_class_object.
(scm_make_subclass_object): Let the subclass have same metaclass
as the superclass.
Some indentation fixes.
* objects.h (SCM_METACLASS_STANDARD_LAYOUT): Printer field is no
longer a user field; New field: class_flags.
* objets.c, objects.h: New metaclass: scm_metaclass_operator.
