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Standard Lisp
number
character symbol
real
string
rational
integer
float
fixnum
bignum
ratio
short-float3
single-float
double-float3
long-float
complex
Considered scalar
types
cons
list
vector
array
hash-table
Other types
scalar
t
Table 1: NST provides methods of generic function arbitrary generating values
of the types in this table.
Value
:standard
:ascii
:ascii-ext
Meaning
Codes up to 96
Codes through 127
Codes through 255
Omitted or with any other value, characters with any code up to
char-code-limit can result. Examples:
(nst:arbitrary ’character)
(nst:arbitrary ’(character :noncontrol t
:range :standard))
• Type symbol.
– Argument existing. If non-nil, requires that the result be a previouslyinterned symbol.
– Argument exported. Requires that the result be not only a previouslyinterned symbol, but also one exported by its package. Ignored if
existing is explicitly set to nil.
– Argument package. Specifies the package from which the symbol
will be generated. If omitted, a package is selected at random from
the existing ones.
– Argument nonnull. If non-nil, allows arbitrary to ignore other
restriction to guarantee returning a non-nil symbol. When null,
arbitrary may return nil.
– Argument gensym. If non-nil, and if arbitrary is explicitly set to
nil, returns a new uninterned symbol.
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