Issue: BIT-ARRAY-FUNCTIONS (version 6)

[David A. Moon <Moon@STONY-BROOK.SCRC.Symbolics.COM>]

    Date: Mon, 19 Jun 89 13:31 EDT
    From: Barry Margolin <barmar@Think.COM>

    I'd like to suggest an additional change, which seems to be consistent
    with the attitude about use of bit vectors expressed in the proposal.
    The BIT and SBIT functions should return 0 if asked to access outside
    the bit array.  This would maintain the tautology

	    (bit (bit-XXX v1 v2) n) == (logXXX (bit v1 n) (bit v2 n))

    If slowing down these functions (they'd be the only array accessors
    REQUIRED to check the dimensions) is considered unacceptable, then a new
    accessor should be added.

I don't like this idea.

If upon reflection you still like it, could you prepare an amendment
to bring up at the meeting next week?