- Syntax:
-
make-sequence
result-type size &key initial-element
sequence
- Arguments and Values:
-
result-type - a sequence type specifier.
size - a non-negative integer.
initial-element - an object.
The default is implementation-dependent.
sequence - a proper sequence.
- Description:
-
Returns a sequence of the type result-type and of length size,
each of the elements of which has been initialized to initial-element.
If the result-type is a subtype of list,
the result will be a list.
If the result-type is a subtype of vector,
then if the implementation can determine the element type specified
for the result-type, the element type of the resulting array
is the result of upgrading that element type; or, if the
implementation can determine that the element type is unspecified (or *),
the element type of the resulting array is t;
otherwise, an error is signaled.
- Examples:
-
(make-sequence 'list 0) ()
(make-sequence 'string 26 :initial-element #\.)
".........................."
(make-sequence '(vector double-float) 2
:initial-element 1d0)
#(1.0d0 1.0d0)
(make-sequence '(vector * 2) 3) should signal an error
(make-sequence '(vector * 4) 3) should signal an error
- Affected By:
-
The implementation.
- Exceptional Situations:
-
The consequences are unspecified if initial-element
is not an object which can be stored in the resulting sequence.
An error of type type-error must be signaled if the result-type is neither
a recognizable subtype of list,
nor a recognizable subtype of vector.
An error of type type-error should be signaled if result-type specifies
the number of elements and size is different from that number.
- See Also:
-
make-array, make-list
- Notes:
-
(make-sequence 'string 5) ==(make-string 5)
- Allegro CL Implementation Details:
-
None.
17 Sequences