Type

Summary

The string type.

Package

common-lisp

Signature

string length element-type

Arguments

length

The length of the string (or * , meaning any).

element-type

The type of string element. The default is the value of *default-character-element-type* rather than * .

Description

The union of all string types as specified in the standard, but extended with an extra parameter: element-type .

(string length element-type ) means all string types whose element type is a subtype of element-type . That is:

(string * base-char) = (vector base-char *)

(string * lw:simple-char) = (or (vector base-char *)

                                (vector lw:simple-char *))

(string * character)      = (or (vector base-char *)

                                (vector lw:simple-char *)

                                (vector character *)) 

Example

CL-USER 235 > (lw:set-default-character-element-type

                     'base-char)

BASE-CHAR

CL-USER 236 > (concatenate 'string "f" "o" "o")

"foo"

CL-USER 237 > (type-of *)

SIMPLE-BASE-STRING

See also

*default-character-element-type*
set-default-character-element-type