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- To: firstname.lastname@example.org
- Subject: arrays
- From: Richard Berman <email@example.com>
- Date: Wed, 20 May 87 16:22:48 PDT
- Posted-date: Wed, 20 May 87 16:22:48 PDT
On bit vectors:
on page 12:
"One dimensional arrays of bits (that is, of integers whose values are 0 or 1)
are called bit vectors"
implies that any array of all 0 and 1 integers is a bit vector.
"All implementations are also required to provide specialized arrays of bits,
that is, arrays of type (array bit); the one-dimensional instances of this
specialization are called bit-vectors."
"Vectors whose elements are restricted to type bit are called bit-vectors"
This implies strongly that a bit vector won't let one store any other value
than 0 or 1.
So, is this a bit vector?
#(1 0 0 1) and should things like BIT-NOT which specifically want a bit vector
work on it. Does it return a general vector like this in this case rather
than something like *0110???
It is my *opinion* that #(1 0 0 1) is not a bit vector because there is a
precise input style for such (like *1001) and bit vectors are specialized.
What do you think? Is this a real maybe?
- From: David A. Moon <Moon@STONY-BROOK.SCRC.Symbolics.COM>