+2000-03-29 Ken Raeburn <raeburn@gnu.org>
+
+ * config.in (ENABLE_CHECKING): Undef.
+
+ * lisp.h (struct interval): Replace "parent" field with a union of
+ interval pointer and Lisp_Object; add new bitfield to use as
+ discriminant. Change other flag fields to bitfields.
+ (CHECK): New macro for consistency checking. If ENABLE_CHECKING
+ is defined and the supplied test fails, print a message and
+ abort.
+ (eassert): New macro. Use CHECK to provide an assert-like
+ facility.
+
+ * intervals.h (NULL_INTERVAL_P): Now applies only to real interval
+ pointers; abort if the value looks like a lisp object.
+ (NULL_INTERVAL_P, NULL_PARENT, HAS_PARENT, HAS_OBJECT, SET_PARENT,
+ SET_OBJECT, INTERVAL_PARENT, GET_INTERVAL_OBJECT, COPY_PARENT):
+ Modify for new interval parent definition.
+
+ * alloc.c (mark_interval_tree, MARK_INTERVAL_TREE,
+ UNMARK_BALANCE_INTERVALS): Update references that need an
+ addressable lisp object in the interval structure.
+ (die): New function.
+ (suppress_checking): New variable.
+
+ * intervals.c (interval_start_pos): Just return 0 if there's no
+ parent object.
+
2000-03-29 Gerd Moellmann <gerd@gnu.org>
* lread.c (read1): Accept `.' (period) as symbol start like in CL