7 Nov
2005
7 Nov
'05
1:53 p.m.
* Luke Gorrie [2005-11-07 09:40+0100] writes:
Do you remember why we have *READ-SUPPRESS* bound to NIL when we call READ-AND-RECORD-SOURCE-MAP? I don't and it seems comment-worthy.
READ returns always nil if *READ-SUPPRESS* is t, but we need the form for the lookup in the source-map. (It doesn't matter if we read it in the wrong package.)
We set *READ-SUPPRESS* to t while skipping over the uninteresting top-level forms just to avoid unnecessary interning. This seems to be a bigger annoyance because many readmacro writers forget to test their code with *READ-SUPPRESS* = t.
Helmut.