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ANSI Common Lisp  15 Arrays 15.2 Dictionary of Arrays
| 15.2.33 bit, sbit |
Accessor |
- Syntax:
-
| bit bit-array &rest subscripts | 
bit |
| sbit bit-array &rest subscripts |
new-bit |
(setf(bit bit-array &rest subscrips) new-bit)
(setf(sbit bit-array &rest subscrips) new-bit)
- Arguments and Values:
-
bit-array - for bit, a bit array;
for sbit, a simple bit array.
subscripts - a list of valid array indices
for the bit-array.
bit - a bit.
- Description:
-
bit and sbit access the bit-array
element specified by subscripts.
These functions ignore the fill pointer when accessing elements.
- Examples:
-
(bit (setq ba (make-array 8
:element-type 'bit
:initial-element 1))
3) 1
(setf (bit ba 3) 0) 0
(bit ba 3) 0
(sbit ba 5) 1
(setf (sbit ba 5) 1) 1
(sbit ba 5) 1
- See Also:
-
aref,
Section 3.2.1 Compiler Terminology
- Notes:
-
bit and sbit are like aref
except that they require arrays to be
a bit array and a simple bit array, respectively.
bit and sbit, unlike char and schar,
allow the first argument to be an array of any rank.
- Allegro CL Implementation Details:
-
None.
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