To Do (or: known bugs and planned features)
+ patterns for phyla, 'with' over abstract_phylum
+ clean up printer ( ... }<CR><TAB>... leads to too much whitespace )
+ allow constructors for list phylums
+ malloc
+ overlap checks

Internal tracking:
? still_unique probably broken
+ doc: '::'
+ generated prototypes have spurious spaces at end

 - wrt the function argument declaration:
      currently onlysimple arguments are allowed: plain types,
      pointers and function pointers, but no arrays.
      this should be more complete, probably also including ANSI C things
      like const and volatile.
 - wrt CSGIO error reporting:
      keeping a line count, error rports should refer to the line in
      the structure file where the error occured.
 - wrt atomic (predefined) phyla:
      allowing the user to specify own atomic phyla, in a way similar
      as in the SG.


* --no-linedirec makes no line direcs, add --lindirec-comment or such
* try to warn about using the same pattern multiple times, better sorting
* rename: KC_LANGUAGE -> is_language, KC_SET_LANGUAGE -> set_language, move KC_TEXT
* think again about offsetlist and subphylalist (global? rather attribute)
* get rid of kc_void_ptr
* incorporate kc4.4->4.6 changes
* make CSGIOread usable w/o type (fred::CSGI...)
* remove longjmp in CSGIO
* intialisation for non-static %attr; _no_ static %attr
* %attr and %member must be attributes like the old-style ones for copy
* make %attr and %member behave differently wrt CSGIO
* remove GLOBAL_ATTRIBUTE_PATCH
* YYSTYPE optional
* kc_integer -> integer
* integer value per macro
* remove COPY_ATTRIBUTES
* remove CREATE_ROUTINE
* namespace
* outmost patterns with conditions
* phylum_cast
* unparse(seemingly_old_printer_function, uview) in abstract_phylum
* options for covariant return
* kc_do_free_phylum: get rid of voidptr
* should kc_CSGIOscan_{integer|real} still exist? NO!
* get rid of all offset stuff (KC_OFFSET.., KC_SUBPHY...)
* in kc_CSGIOread2dft: YYSTYPE.yt_voidptr assignments must cast to voidptr (but see below)
* don't use YYSTYPE as often
* enable NO_COVARIANT_RETURN
* in kc_CSGIOwrite2structure: wrong casts from kc_p
* in kc_CSGIOscan: cases are incorrectly indented
* unparse needs printer_function instead of void(*)(char*, uview)
* unparse templates (in k.h) must use printer_function
- v_*_printer in error.k need to be printer_function
* in v_file_printer: 4th arg must be const, accordingly where it is called
* in kc_do_printdot_add_edge: cast to voidptr (but see below)
* kc_do_print_phylum does not accept kc_void_ptr
* kc_CSGIOscan takes kc_phylum* as second parameter
* in kc_CSGIOscan, l. 12: add const_cast
* in kc_CSGIOscan_{integer|real}, kc_CSGIOwrite2structure: add const (or c_) and const_cast for kc_p