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| ANSI Common Lisp 2 Syntax 2.4 Standard Macro Characters 2.4.8 Sharpsign ### 2.4.8.4 Sharpsign Asterisk Syntax: `#*<<bits>>` A simple bit vector is constructed containing the indicated bits (`0`'s and `1`'s), where the leftmost bit has index zero and the subsequent bits have increasing indices. Syntax: `#<<n>>*<<bits>>` With an argument n, the vector to be created is of length n. If the number of bits is less than n but greater than zero, the last bit is used to fill all remaining bits of the bit vector. The notations `#*` and `#0*` each denote an empty bit vector. Regardless of whether the optional numeric argument n is provided, the token that follows the asterisk is delimited by a normal token delimiter. However, (unless the value of *read-suppress* is true) an error of type reader-error is signaled if that token is not composed entirely of `0`'s and `1`'s, or if n was supplied and the token is composed of more than n bits, or if n is greater than one, but no bits were specified. Neither a single escape nor a multiple escape is permitted in this token. For information on how the Lisp printer prints bit vectors, see Section 22.1.3.6 Printing Bit Vectors. 2.4.8.4.1 Examples of Sharpsign Asterisk

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