16 Aug
2005
16 Aug
'05
1:58 a.m.
Hello,
Incremental redisplay uses objects of type output-record to determine what to redisplay. Output records are subclasses of bounding-rectangle. But bounding-rectangle is not a subclass of region, so one cannot use region-intersects-region-p to check whether two output records overlap. But this is in fact the case in the current incremental redisplay code.
--
Robert Strandh
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Greenspun's Tenth Rule of Programming: any sufficiently complicated C
or Fortran program contains an ad hoc informally-specified bug-ridden
slow implementation of half of Common Lisp.
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