Next: *read-base*, Previous: set-syntax-from-char, Up: Reader Dictionary
with-standard-io-syntax {form}* ⇒ {result}*
forms—an implicit progn.
results—the values returned by the forms.
Within the dynamic extent of the body of forms, all reader/printer control variables, including any implementation-defined ones not specified by this standard, are bound to values that produce standard read/print behavior. The values for the variables specified by this standard are listed in Figure 23–1.
[Reviewer Note by Barrett: *print-pprint-dispatch* should probably be mentioned here, too.]
Variable Value
*package* The CL-USER package
*print-array* t
*print-base* 10
*print-case* :upcase
*print-circle* nil
*print-escape* t
*print-gensym* t
*print-length* nil
*print-level* nil
*print-lines* nil
*print-miser-width* nil
*print-pprint-dispatch* The standard pprint dispatch table
*print-pretty* nil
*print-radix* nil
*print-readably* t
*print-right-margin* nil
*read-base* 10
*read-default-float-format* single-float
*read-eval* t
*read-suppress* nil
*readtable* The standard readtable
Figure 23–1: Values of standard control variables
(with-open-file (file pathname :direction :output)
(with-standard-io-syntax
(print data file)))
;;; ... Later, in another Lisp:
(with-open-file (file pathname :direction :input)
(with-standard-io-syntax
(setq data (read file))))